gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88 # extra breadcrumbs preceding the home link
  89 our @extra_breadcrumbs = ();
  90
  91 # name of your site or organization to appear in page titles
  92 # replace this with something more descriptive for clearer bookmarks
  93 our $site_name = "++GITWEB_SITENAME++"
  94                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  95
  96 # html snippet to include in the <head> section of each page
  97 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109 # URI of GIT logo (72x27 size)
 110 our $logo = "++GITWEB_LOGO++";
 111 # URI of GIT favicon, assumed to be image/png type
 112 our $favicon = "++GITWEB_FAVICON++";
 113 # URI of gitweb.js (JavaScript code for gitweb)
 114 our $javascript = "++GITWEB_JS++";
 115
 116 # URI and label (title) of GIT logo link
 117 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118 #our $logo_label = "git documentation";
 119 our $logo_url = "http://git-scm.com/";
 120 our $logo_label = "git homepage";
 121
 122 # source of projects list
 123 our $projects_list = "++GITWEB_LIST++";
 124
 125 # the width (in characters) of the projects list "Description" column
 126 our $projects_list_description_width = 25;
 127
 128 # group projects by category on the projects list
 129 # (enabled if this variable evaluates to true)
 130 our $projects_list_group_categories = 0;
 131
 132 # default category if none specified
 133 # (leave the empty string for no category)
 134 our $project_list_default_category = "";
 135
 136 # default order of projects list
 137 # valid values are none, project, descr, owner, and age
 138 our $default_projects_order = "project";
 139
 140 # show repository only if this file exists
 141 # (only effective if this variable evaluates to true)
 142 our $export_ok = "++GITWEB_EXPORT_OK++";
 143
 144 # don't generate age column on the projects list page
 145 our $omit_age_column = 0;
 146
 147 # don't generate information about owners of repositories
 148 our $omit_owner=0;
 149
 150 # show repository only if this subroutine returns true
 151 # when given the path to the project, for example:
 152 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 153 our $export_auth_hook = undef;
 154
 155 # only allow viewing of repositories also shown on the overview page
 156 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 157
 158 # list of git base URLs used for URL to where fetch project from,
 159 # i.e. full URL is "$git_base_url/$project"
 160 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 161
 162 # default blob_plain mimetype and default charset for text/plain blob
 163 our $default_blob_plain_mimetype = 'text/plain';
 164 our $default_text_plain_charset  = undef;
 165
 166 # file to use for guessing MIME types before trying /etc/mime.types
 167 # (relative to the current git repository)
 168 our $mimetypes_file = undef;
 169
 170 # assume this charset if line contains non-UTF-8 characters;
 171 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 172 # for which encoding all byte sequences are valid, for example
 173 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 174 # could be even 'utf-8' for the old behavior)
 175 our $fallback_encoding = 'latin1';
 176
 177 # rename detection options for git-diff and git-diff-tree
 178 # - default is '-M', with the cost proportional to
 179 #   (number of removed files) * (number of new files).
 180 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 181 #   (number of changed files + number of removed files) * (number of new files)
 182 # - even more costly is '-C', '--find-copies-harder' with cost
 183 #   (number of files in the original tree) * (number of new files)
 184 # - one might want to include '-B' option, e.g. '-B', '-M'
 185 our @diff_opts = ('-M'); # taken from git_commit
 186
 187 # Disables features that would allow repository owners to inject script into
 188 # the gitweb domain.
 189 our $prevent_xss = 0;
 190
 191 # Path to the highlight executable to use (must be the one from
 192 # http://www.andre-simon.de due to assumptions about parameters and output).
 193 # Useful if highlight is not installed on your webserver's PATH.
 194 # [Default: highlight]
 195 our $highlight_bin = "++HIGHLIGHT_BIN++";
 196
 197 # information about snapshot formats that gitweb is capable of serving
 198 our %known_snapshot_formats = (
 199         # name => {
 200         #       'display' => display name,
 201         #       'type' => mime type,
 202         #       'suffix' => filename suffix,
 203         #       'format' => --format for git-archive,
 204         #       'compressor' => [compressor command and arguments]
 205         #                       (array reference, optional)
 206         #       'disabled' => boolean (optional)}
 207         #
 208         'tgz' => {
 209                 'display' => 'tar.gz',
 210                 'type' => 'application/x-gzip',
 211                 'suffix' => '.tar.gz',
 212                 'format' => 'tar',
 213                 'compressor' => ['gzip', '-n']},
 214
 215         'tbz2' => {
 216                 'display' => 'tar.bz2',
 217                 'type' => 'application/x-bzip2',
 218                 'suffix' => '.tar.bz2',
 219                 'format' => 'tar',
 220                 'compressor' => ['bzip2']},
 221
 222         'txz' => {
 223                 'display' => 'tar.xz',
 224                 'type' => 'application/x-xz',
 225                 'suffix' => '.tar.xz',
 226                 'format' => 'tar',
 227                 'compressor' => ['xz'],
 228                 'disabled' => 1},
 229
 230         'zip' => {
 231                 'display' => 'zip',
 232                 'type' => 'application/x-zip',
 233                 'suffix' => '.zip',
 234                 'format' => 'zip'},
 235 );
 236
 237 # Aliases so we understand old gitweb.snapshot values in repository
 238 # configuration.
 239 our %known_snapshot_format_aliases = (
 240         'gzip'  => 'tgz',
 241         'bzip2' => 'tbz2',
 242         'xz'    => 'txz',
 243
 244         # backward compatibility: legacy gitweb config support
 245         'x-gzip' => undef, 'gz' => undef,
 246         'x-bzip2' => undef, 'bz2' => undef,
 247         'x-zip' => undef, '' => undef,
 248 );
 249
 250 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 251 # are changed, it may be appropriate to change these values too via
 252 # $GITWEB_CONFIG.
 253 our %avatar_size = (
 254         'default' => 16,
 255         'double'  => 32
 256 );
 257
 258 # Used to set the maximum load that we will still respond to gitweb queries.
 259 # If server load exceed this value then return "503 server busy" error.
 260 # If gitweb cannot determined server load, it is taken to be 0.
 261 # Leave it undefined (or set to 'undef') to turn off load checking.
 262 our $maxload = 300;
 263
 264 # configuration for 'highlight' (http://www.andre-simon.de/)
 265 # match by basename
 266 our %highlight_basename = (
 267         #'Program' => 'py',
 268         #'Library' => 'py',
 269         'SConstruct' => 'py', # SCons equivalent of Makefile
 270         'Makefile' => 'make',
 271 );
 272 # match by extension
 273 our %highlight_ext = (
 274         # main extensions, defining name of syntax;
 275         # see files in /usr/share/highlight/langDefs/ directory
 276         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 277         # alternate extensions, see /etc/highlight/filetypes.conf
 278         (map { $_ => 'c'   } qw(c h)),
 279         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 280         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 281         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 282         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 283         (map { $_ => 'make'} qw(make mak mk)),
 284         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 285 );
 286
 287 # You define site-wide feature defaults here; override them with
 288 # $GITWEB_CONFIG as necessary.
 289 our %feature = (
 290         # feature => {
 291         #       'sub' => feature-sub (subroutine),
 292         #       'override' => allow-override (boolean),
 293         #       'default' => [ default options...] (array reference)}
 294         #
 295         # if feature is overridable (it means that allow-override has true value),
 296         # then feature-sub will be called with default options as parameters;
 297         # return value of feature-sub indicates if to enable specified feature
 298         #
 299         # if there is no 'sub' key (no feature-sub), then feature cannot be
 300         # overridden
 301         #
 302         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 303         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 304         # is enabled
 305
 306         # Enable the 'blame' blob view, showing the last commit that modified
 307         # each line in the file. This can be very CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'blame'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'blame'}{'override'} = 1;
 313         # and in project config gitweb.blame = 0|1;
 314         'blame' => {
 315                 'sub' => sub { feature_bool('blame', @_) },
 316                 'override' => 0,
 317                 'default' => [0]},
 318
 319         # Enable the 'snapshot' link, providing a compressed archive of any
 320         # tree. This can potentially generate high traffic if you have large
 321         # project.
 322
 323         # Value is a list of formats defined in %known_snapshot_formats that
 324         # you wish to offer.
 325         # To disable system wide have in $GITWEB_CONFIG
 326         # $feature{'snapshot'}{'default'} = [];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'snapshot'}{'override'} = 1;
 329         # and in project config, a comma-separated list of formats or "none"
 330         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 331         'snapshot' => {
 332                 'sub' => \&feature_snapshot,
 333                 'override' => 0,
 334                 'default' => ['tgz']},
 335
 336         # Enable text search, which will list the commits which match author,
 337         # committer or commit text to a given string.  Enabled by default.
 338         # Project specific override is not supported.
 339         #
 340         # Note that this controls all search features, which means that if
 341         # it is disabled, then 'grep' and 'pickaxe' search would also be
 342         # disabled.
 343         'search' => {
 344                 'override' => 0,
 345                 'default' => [1]},
 346
 347         # Enable grep search, which will list the files in currently selected
 348         # tree containing the given string. Enabled by default. This can be
 349         # potentially CPU-intensive, of course.
 350         # Note that you need to have 'search' feature enabled too.
 351
 352         # To enable system wide have in $GITWEB_CONFIG
 353         # $feature{'grep'}{'default'} = [1];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'grep'}{'override'} = 1;
 356         # and in project config gitweb.grep = 0|1;
 357         'grep' => {
 358                 'sub' => sub { feature_bool('grep', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Enable the pickaxe search, which will list the commits that modified
 363         # a given string in a file. This can be practical and quite faster
 364         # alternative to 'blame', but still potentially CPU-intensive.
 365         # Note that you need to have 'search' feature enabled too.
 366
 367         # To enable system wide have in $GITWEB_CONFIG
 368         # $feature{'pickaxe'}{'default'} = [1];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'pickaxe'}{'override'} = 1;
 371         # and in project config gitweb.pickaxe = 0|1;
 372         'pickaxe' => {
 373                 'sub' => sub { feature_bool('pickaxe', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Enable showing size of blobs in a 'tree' view, in a separate
 378         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 379
 380         # To disable system wide have in $GITWEB_CONFIG
 381         # $feature{'show-sizes'}{'default'} = [0];
 382         # To have project specific config enable override in $GITWEB_CONFIG
 383         # $feature{'show-sizes'}{'override'} = 1;
 384         # and in project config gitweb.showsizes = 0|1;
 385         'show-sizes' => {
 386                 'sub' => sub { feature_bool('showsizes', @_) },
 387                 'override' => 0,
 388                 'default' => [1]},
 389
 390         # Make gitweb use an alternative format of the URLs which can be
 391         # more readable and natural-looking: project name is embedded
 392         # directly in the path and the query string contains other
 393         # auxiliary information. All gitweb installations recognize
 394         # URL in either format; this configures in which formats gitweb
 395         # generates links.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'pathinfo'}{'default'} = [1];
 399         # Project specific override is not supported.
 400
 401         # Note that you will need to change the default location of CSS,
 402         # favicon, logo and possibly other files to an absolute URL. Also,
 403         # if gitweb.cgi serves as your indexfile, you will need to force
 404         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 405         'pathinfo' => {
 406                 'override' => 0,
 407                 'default' => [0]},
 408
 409         # Make gitweb consider projects in project root subdirectories
 410         # to be forks of existing projects. Given project $projname.git,
 411         # projects matching $projname/*.git will not be shown in the main
 412         # projects list, instead a '+' mark will be added to $projname
 413         # there and a 'forks' view will be enabled for the project, listing
 414         # all the forks. If project list is taken from a file, forks have
 415         # to be listed after the main project.
 416
 417         # To enable system wide have in $GITWEB_CONFIG
 418         # $feature{'forks'}{'default'} = [1];
 419         # Project specific override is not supported.
 420         'forks' => {
 421                 'override' => 0,
 422                 'default' => [0]},
 423
 424         # Insert custom links to the action bar of all project pages.
 425         # This enables you mainly to link to third-party scripts integrating
 426         # into gitweb; e.g. git-browser for graphical history representation
 427         # or custom web-based repository administration interface.
 428
 429         # The 'default' value consists of a list of triplets in the form
 430         # (label, link, position) where position is the label after which
 431         # to insert the link and link is a format string where %n expands
 432         # to the project name, %f to the project path within the filesystem,
 433         # %h to the current hash (h gitweb parameter) and %b to the current
 434         # hash base (hb gitweb parameter); %% expands to %.
 435
 436         # To enable system wide have in $GITWEB_CONFIG e.g.
 437         # $feature{'actions'}{'default'} = [('graphiclog',
 438         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 439         # Project specific override is not supported.
 440         'actions' => {
 441                 'override' => 0,
 442                 'default' => []},
 443
 444         # Allow gitweb scan project content tags of project repository,
 445         # and display the popular Web 2.0-ish "tag cloud" near the projects
 446         # list.  Note that this is something COMPLETELY different from the
 447         # normal Git tags.
 448
 449         # gitweb by itself can show existing tags, but it does not handle
 450         # tagging itself; you need to do it externally, outside gitweb.
 451         # The format is described in git_get_project_ctags() subroutine.
 452         # You may want to install the HTML::TagCloud Perl module to get
 453         # a pretty tag cloud instead of just a list of tags.
 454
 455         # To enable system wide have in $GITWEB_CONFIG
 456         # $feature{'ctags'}{'default'} = [1];
 457         # Project specific override is not supported.
 458
 459         # In the future whether ctags editing is enabled might depend
 460         # on the value, but using 1 should always mean no editing of ctags.
 461         'ctags' => {
 462                 'override' => 0,
 463                 'default' => [0]},
 464
 465         # The maximum number of patches in a patchset generated in patch
 466         # view. Set this to 0 or undef to disable patch view, or to a
 467         # negative number to remove any limit.
 468
 469         # To disable system wide have in $GITWEB_CONFIG
 470         # $feature{'patches'}{'default'} = [0];
 471         # To have project specific config enable override in $GITWEB_CONFIG
 472         # $feature{'patches'}{'override'} = 1;
 473         # and in project config gitweb.patches = 0|n;
 474         # where n is the maximum number of patches allowed in a patchset.
 475         'patches' => {
 476                 'sub' => \&feature_patches,
 477                 'override' => 0,
 478                 'default' => [16]},
 479
 480         # Avatar support. When this feature is enabled, views such as
 481         # shortlog or commit will display an avatar associated with
 482         # the email of the committer(s) and/or author(s).
 483
 484         # Currently available providers are gravatar and picon.
 485         # If an unknown provider is specified, the feature is disabled.
 486
 487         # Gravatar depends on Digest::MD5.
 488         # Picon currently relies on the indiana.edu database.
 489
 490         # To enable system wide have in $GITWEB_CONFIG
 491         # $feature{'avatar'}{'default'} = ['<provider>'];
 492         # where <provider> is either gravatar or picon.
 493         # To have project specific config enable override in $GITWEB_CONFIG
 494         # $feature{'avatar'}{'override'} = 1;
 495         # and in project config gitweb.avatar = <provider>;
 496         'avatar' => {
 497                 'sub' => \&feature_avatar,
 498                 'override' => 0,
 499                 'default' => ['']},
 500
 501         # Enable displaying how much time and how many git commands
 502         # it took to generate and display page.  Disabled by default.
 503         # Project specific override is not supported.
 504         'timed' => {
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable turning some links into links to actions which require
 509         # JavaScript to run (like 'blame_incremental').  Not enabled by
 510         # default.  Project specific override is currently not supported.
 511         'javascript-actions' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable and configure ability to change common timezone for dates
 516         # in gitweb output via JavaScript.  Enabled by default.
 517         # Project specific override is not supported.
 518         'javascript-timezone' => {
 519                 'override' => 0,
 520                 'default' => [
 521                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 522                                      # or undef to turn off this feature
 523                         'gitweb_tz', # name of cookie where to store selected timezone
 524                         'datetime',  # CSS class used to mark up dates for manipulation
 525                 ]},
 526
 527         # Syntax highlighting support. This is based on Daniel Svensson's
 528         # and Sham Chukoury's work in gitweb-xmms2.git.
 529         # It requires the 'highlight' program present in $PATH,
 530         # and therefore is disabled by default.
 531
 532         # To enable system wide have in $GITWEB_CONFIG
 533         # $feature{'highlight'}{'default'} = [1];
 534
 535         'highlight' => {
 536                 'sub' => sub { feature_bool('highlight', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539
 540         # Enable displaying of remote heads in the heads list
 541
 542         # To enable system wide have in $GITWEB_CONFIG
 543         # $feature{'remote_heads'}{'default'} = [1];
 544         # To have project specific config enable override in $GITWEB_CONFIG
 545         # $feature{'remote_heads'}{'override'} = 1;
 546         # and in project config gitweb.remoteheads = 0|1;
 547         'remote_heads' => {
 548                 'sub' => sub { feature_bool('remote_heads', @_) },
 549                 'override' => 0,
 550                 'default' => [0]},
 551
 552         # Enable showing branches under other refs in addition to heads
 553
 554         # To set system wide extra branch refs have in $GITWEB_CONFIG
 555         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 556         # To have project specific config enable override in $GITWEB_CONFIG
 557         # $feature{'extra-branch-refs'}{'override'} = 1;
 558         # and in project config gitweb.extrabranchrefs = dirs of choice
 559         # Every directory is separated with whitespace.
 560
 561         'extra-branch-refs' => {
 562                 'sub' => \&feature_extra_branch_refs,
 563                 'override' => 0,
 564                 'default' => []},
 565 );
 566
 567 sub gitweb_get_feature {
 568         my ($name) = @_;
 569         return unless exists $feature{$name};
 570         my ($sub, $override, @defaults) = (
 571                 $feature{$name}{'sub'},
 572                 $feature{$name}{'override'},
 573                 @{$feature{$name}{'default'}});
 574         # project specific override is possible only if we have project
 575         our $git_dir; # global variable, declared later
 576         if (!$override || !defined $git_dir) {
 577                 return @defaults;
 578         }
 579         if (!defined $sub) {
 580                 warn "feature $name is not overridable";
 581                 return @defaults;
 582         }
 583         return $sub->(@defaults);
 584 }
 585
 586 # A wrapper to check if a given feature is enabled.
 587 # With this, you can say
 588 #
 589 #   my $bool_feat = gitweb_check_feature('bool_feat');
 590 #   gitweb_check_feature('bool_feat') or somecode;
 591 #
 592 # instead of
 593 #
 594 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 595 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 596 #
 597 sub gitweb_check_feature {
 598         return (gitweb_get_feature(@_))[0];
 599 }
 600
 601
 602 sub feature_bool {
 603         my $key = shift;
 604         my ($val) = git_get_project_config($key, '--bool');
 605
 606         if (!defined $val) {
 607                 return ($_[0]);
 608         } elsif ($val eq 'true') {
 609                 return (1);
 610         } elsif ($val eq 'false') {
 611                 return (0);
 612         }
 613 }
 614
 615 sub feature_snapshot {
 616         my (@fmts) = @_;
 617
 618         my ($val) = git_get_project_config('snapshot');
 619
 620         if ($val) {
 621                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 622         }
 623
 624         return @fmts;
 625 }
 626
 627 sub feature_patches {
 628         my @val = (git_get_project_config('patches', '--int'));
 629
 630         if (@val) {
 631                 return @val;
 632         }
 633
 634         return ($_[0]);
 635 }
 636
 637 sub feature_avatar {
 638         my @val = (git_get_project_config('avatar'));
 639
 640         return @val ? @val : @_;
 641 }
 642
 643 sub feature_extra_branch_refs {
 644         my (@branch_refs) = @_;
 645         my $values = git_get_project_config('extrabranchrefs');
 646
 647         if ($values) {
 648                 $values = config_to_multi ($values);
 649                 @branch_refs = ();
 650                 foreach my $value (@{$values}) {
 651                         push @branch_refs, split /\s+/, $value;
 652                 }
 653         }
 654
 655         return @branch_refs;
 656 }
 657
 658 # checking HEAD file with -e is fragile if the repository was
 659 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 660 # and then pruned.
 661 sub check_head_link {
 662         my ($dir) = @_;
 663         my $headfile = "$dir/HEAD";
 664         return ((-e $headfile) ||
 665                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 666 }
 667
 668 sub check_export_ok {
 669         my ($dir) = @_;
 670         return (check_head_link($dir) &&
 671                 (!$export_ok || -e "$dir/$export_ok") &&
 672                 (!$export_auth_hook || $export_auth_hook->($dir)));
 673 }
 674
 675 # process alternate names for backward compatibility
 676 # filter out unsupported (unknown) snapshot formats
 677 sub filter_snapshot_fmts {
 678         my @fmts = @_;
 679
 680         @fmts = map {
 681                 exists $known_snapshot_format_aliases{$_} ?
 682                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 683         @fmts = grep {
 684                 exists $known_snapshot_formats{$_} &&
 685                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 686 }
 687
 688 sub filter_and_validate_refs {
 689         my @refs = @_;
 690         my %unique_refs = ();
 691
 692         foreach my $ref (@refs) {
 693                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 694                 # 'heads' are added implicitly in get_branch_refs().
 695                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 696         }
 697         return sort keys %unique_refs;
 698 }
 699
 700 # If it is set to code reference, it is code that it is to be run once per
 701 # request, allowing updating configurations that change with each request,
 702 # while running other code in config file only once.
 703 #
 704 # Otherwise, if it is false then gitweb would process config file only once;
 705 # if it is true then gitweb config would be run for each request.
 706 our $per_request_config = 1;
 707
 708 # read and parse gitweb config file given by its parameter.
 709 # returns true on success, false on recoverable error, allowing
 710 # to chain this subroutine, using first file that exists.
 711 # dies on errors during parsing config file, as it is unrecoverable.
 712 sub read_config_file {
 713         my $filename = shift;
 714         return unless defined $filename;
 715         # die if there are errors parsing config file
 716         if (-e $filename) {
 717                 do $filename;
 718                 die $@ if $@;
 719                 return 1;
 720         }
 721         return;
 722 }
 723
 724 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 725 sub evaluate_gitweb_config {
 726         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 727         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 728         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 729
 730         # Protect against duplications of file names, to not read config twice.
 731         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 732         # there possibility of duplication of filename there doesn't matter.
 733         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 734         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 735
 736         # Common system-wide settings for convenience.
 737         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 738         read_config_file($GITWEB_CONFIG_COMMON);
 739
 740         # Use first config file that exists.  This means use the per-instance
 741         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 742         read_config_file($GITWEB_CONFIG) and return;
 743         read_config_file($GITWEB_CONFIG_SYSTEM);
 744 }
 745
 746 # Get loadavg of system, to compare against $maxload.
 747 # Currently it requires '/proc/loadavg' present to get loadavg;
 748 # if it is not present it returns 0, which means no load checking.
 749 sub get_loadavg {
 750         if( -e '/proc/loadavg' ){
 751                 open my $fd, '<', '/proc/loadavg'
 752                         or return 0;
 753                 my @load = split(/\s+/, scalar <$fd>);
 754                 close $fd;
 755
 756                 # The first three columns measure CPU and IO utilization of the last one,
 757                 # five, and 10 minute periods.  The fourth column shows the number of
 758                 # currently running processes and the total number of processes in the m/n
 759                 # format.  The last column displays the last process ID used.
 760                 return $load[0] || 0;
 761         }
 762         # additional checks for load average should go here for things that don't export
 763         # /proc/loadavg
 764
 765         return 0;
 766 }
 767
 768 # version of the core git binary
 769 our $git_version;
 770 sub evaluate_git_version {
 771         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 772         $number_of_git_cmds++;
 773 }
 774
 775 sub check_loadavg {
 776         if (defined $maxload && get_loadavg() > $maxload) {
 777                 die_error(503, "The load average on the server is too high");
 778         }
 779 }
 780
 781 # ======================================================================
 782 # input validation and dispatch
 783
 784 # input parameters can be collected from a variety of sources (presently, CGI
 785 # and PATH_INFO), so we define an %input_params hash that collects them all
 786 # together during validation: this allows subsequent uses (e.g. href()) to be
 787 # agnostic of the parameter origin
 788
 789 our %input_params = ();
 790
 791 # input parameters are stored with the long parameter name as key. This will
 792 # also be used in the href subroutine to convert parameters to their CGI
 793 # equivalent, and since the href() usage is the most frequent one, we store
 794 # the name -> CGI key mapping here, instead of the reverse.
 795 #
 796 # XXX: Warning: If you touch this, check the search form for updating,
 797 # too.
 798
 799 our @cgi_param_mapping = (
 800         project => "p",
 801         action => "a",
 802         file_name => "f",
 803         file_parent => "fp",
 804         hash => "h",
 805         hash_parent => "hp",
 806         hash_base => "hb",
 807         hash_parent_base => "hpb",
 808         page => "pg",
 809         order => "o",
 810         searchtext => "s",
 811         searchtype => "st",
 812         snapshot_format => "sf",
 813         extra_options => "opt",
 814         search_use_regexp => "sr",
 815         ctag => "by_tag",
 816         diff_style => "ds",
 817         project_filter => "pf",
 818         # this must be last entry (for manipulation from JavaScript)
 819         javascript => "js"
 820 );
 821 our %cgi_param_mapping = @cgi_param_mapping;
 822
 823 # we will also need to know the possible actions, for validation
 824 our %actions = (
 825         "blame" => \&git_blame,
 826         "blame_incremental" => \&git_blame_incremental,
 827         "blame_data" => \&git_blame_data,
 828         "blobdiff" => \&git_blobdiff,
 829         "blobdiff_plain" => \&git_blobdiff_plain,
 830         "blob" => \&git_blob,
 831         "blob_plain" => \&git_blob_plain,
 832         "commitdiff" => \&git_commitdiff,
 833         "commitdiff_plain" => \&git_commitdiff_plain,
 834         "commit" => \&git_commit,
 835         "forks" => \&git_forks,
 836         "heads" => \&git_heads,
 837         "history" => \&git_history,
 838         "log" => \&git_log,
 839         "patch" => \&git_patch,
 840         "patches" => \&git_patches,
 841         "remotes" => \&git_remotes,
 842         "rss" => \&git_rss,
 843         "atom" => \&git_atom,
 844         "search" => \&git_search,
 845         "search_help" => \&git_search_help,
 846         "shortlog" => \&git_shortlog,
 847         "summary" => \&git_summary,
 848         "tag" => \&git_tag,
 849         "tags" => \&git_tags,
 850         "tree" => \&git_tree,
 851         "snapshot" => \&git_snapshot,
 852         "object" => \&git_object,
 853         # those below don't need $project
 854         "opml" => \&git_opml,
 855         "project_list" => \&git_project_list,
 856         "project_index" => \&git_project_index,
 857 );
 858
 859 # finally, we have the hash of allowed extra_options for the commands that
 860 # allow them
 861 our %allowed_options = (
 862         "--no-merges" => [ qw(rss atom log shortlog history) ],
 863 );
 864
 865 # fill %input_params with the CGI parameters. All values except for 'opt'
 866 # should be single values, but opt can be an array. We should probably
 867 # build an array of parameters that can be multi-valued, but since for the time
 868 # being it's only this one, we just single it out
 869 sub evaluate_query_params {
 870         our $cgi;
 871
 872         while (my ($name, $symbol) = each %cgi_param_mapping) {
 873                 if ($symbol eq 'opt') {
 874                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 875                 } else {
 876                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 877                 }
 878         }
 879 }
 880
 881 # now read PATH_INFO and update the parameter list for missing parameters
 882 sub evaluate_path_info {
 883         return if defined $input_params{'project'};
 884         return if !$path_info;
 885         $path_info =~ s,^/+,,;
 886         return if !$path_info;
 887
 888         # find which part of PATH_INFO is project
 889         my $project = $path_info;
 890         $project =~ s,/+$,,;
 891         while ($project && !check_head_link("$projectroot/$project")) {
 892                 $project =~ s,/*[^/]*$,,;
 893         }
 894         return unless $project;
 895         $input_params{'project'} = $project;
 896
 897         # do not change any parameters if an action is given using the query string
 898         return if $input_params{'action'};
 899         $path_info =~ s,^\Q$project\E/*,,;
 900
 901         # next, check if we have an action
 902         my $action = $path_info;
 903         $action =~ s,/.*$,,;
 904         if (exists $actions{$action}) {
 905                 $path_info =~ s,^$action/*,,;
 906                 $input_params{'action'} = $action;
 907         }
 908
 909         # list of actions that want hash_base instead of hash, but can have no
 910         # pathname (f) parameter
 911         my @wants_base = (
 912                 'tree',
 913                 'history',
 914         );
 915
 916         # we want to catch, among others
 917         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 918         my ($parentrefname, $parentpathname, $refname, $pathname) =
 919                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 920
 921         # first, analyze the 'current' part
 922         if (defined $pathname) {
 923                 # we got "branch:filename" or "branch:dir/"
 924                 # we could use git_get_type(branch:pathname), but:
 925                 # - it needs $git_dir
 926                 # - it does a git() call
 927                 # - the convention of terminating directories with a slash
 928                 #   makes it superfluous
 929                 # - embedding the action in the PATH_INFO would make it even
 930                 #   more superfluous
 931                 $pathname =~ s,^/+,,;
 932                 if (!$pathname || substr($pathname, -1) eq "/") {
 933                         $input_params{'action'} ||= "tree";
 934                         $pathname =~ s,/$,,;
 935                 } else {
 936                         # the default action depends on whether we had parent info
 937                         # or not
 938                         if ($parentrefname) {
 939                                 $input_params{'action'} ||= "blobdiff_plain";
 940                         } else {
 941                                 $input_params{'action'} ||= "blob_plain";
 942                         }
 943                 }
 944                 $input_params{'hash_base'} ||= $refname;
 945                 $input_params{'file_name'} ||= $pathname;
 946         } elsif (defined $refname) {
 947                 # we got "branch". In this case we have to choose if we have to
 948                 # set hash or hash_base.
 949                 #
 950                 # Most of the actions without a pathname only want hash to be
 951                 # set, except for the ones specified in @wants_base that want
 952                 # hash_base instead. It should also be noted that hand-crafted
 953                 # links having 'history' as an action and no pathname or hash
 954                 # set will fail, but that happens regardless of PATH_INFO.
 955                 if (defined $parentrefname) {
 956                         # if there is parent let the default be 'shortlog' action
 957                         # (for http://git.example.com/repo.git/A..B links); if there
 958                         # is no parent, dispatch will detect type of object and set
 959                         # action appropriately if required (if action is not set)
 960                         $input_params{'action'} ||= "shortlog";
 961                 }
 962                 if ($input_params{'action'} &&
 963                     grep { $_ eq $input_params{'action'} } @wants_base) {
 964                         $input_params{'hash_base'} ||= $refname;
 965                 } else {
 966                         $input_params{'hash'} ||= $refname;
 967                 }
 968         }
 969
 970         # next, handle the 'parent' part, if present
 971         if (defined $parentrefname) {
 972                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 973                 # someproject/blobdiff/oldrev..newrev:/filename
 974                 if ($parentpathname) {
 975                         $parentpathname =~ s,^/+,,;
 976                         $parentpathname =~ s,/$,,;
 977                         $input_params{'file_parent'} ||= $parentpathname;
 978                 } else {
 979                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 980                 }
 981                 # we assume that hash_parent_base is wanted if a path was specified,
 982                 # or if the action wants hash_base instead of hash
 983                 if (defined $input_params{'file_parent'} ||
 984                         grep { $_ eq $input_params{'action'} } @wants_base) {
 985                         $input_params{'hash_parent_base'} ||= $parentrefname;
 986                 } else {
 987                         $input_params{'hash_parent'} ||= $parentrefname;
 988                 }
 989         }
 990
 991         # for the snapshot action, we allow URLs in the form
 992         # $project/snapshot/$hash.ext
 993         # where .ext determines the snapshot and gets removed from the
 994         # passed $refname to provide the $hash.
 995         #
 996         # To be able to tell that $refname includes the format extension, we
 997         # require the following two conditions to be satisfied:
 998         # - the hash input parameter MUST have been set from the $refname part
 999         #   of the URL (i.e. they must be equal)
1000         # - the snapshot format MUST NOT have been defined already (e.g. from
1001         #   CGI parameter sf)
1002         # It's also useless to try any matching unless $refname has a dot,
1003         # so we check for that too
1004         if (defined $input_params{'action'} &&
1005                 $input_params{'action'} eq 'snapshot' &&
1006                 defined $refname && index($refname, '.') != -1 &&
1007                 $refname eq $input_params{'hash'} &&
1008                 !defined $input_params{'snapshot_format'}) {
1009                 # We loop over the known snapshot formats, checking for
1010                 # extensions. Allowed extensions are both the defined suffix
1011                 # (which includes the initial dot already) and the snapshot
1012                 # format key itself, with a prepended dot
1013                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1014                         my $hash = $refname;
1015                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1016                                 next;
1017                         }
1018                         my $sfx = $1;
1019                         # a valid suffix was found, so set the snapshot format
1020                         # and reset the hash parameter
1021                         $input_params{'snapshot_format'} = $fmt;
1022                         $input_params{'hash'} = $hash;
1023                         # we also set the format suffix to the one requested
1024                         # in the URL: this way a request for e.g. .tgz returns
1025                         # a .tgz instead of a .tar.gz
1026                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1027                         last;
1028                 }
1029         }
1030 }
1031
1032 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1033      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1034      $searchtext, $search_regexp, $project_filter);
1035 sub evaluate_and_validate_params {
1036         our $action = $input_params{'action'};
1037         if (defined $action) {
1038                 if (!is_valid_action($action)) {
1039                         die_error(400, "Invalid action parameter");
1040                 }
1041         }
1042
1043         # parameters which are pathnames
1044         our $project = $input_params{'project'};
1045         if (defined $project) {
1046                 if (!is_valid_project($project)) {
1047                         undef $project;
1048                         die_error(404, "No such project");
1049                 }
1050         }
1051
1052         our $project_filter = $input_params{'project_filter'};
1053         if (defined $project_filter) {
1054                 if (!is_valid_pathname($project_filter)) {
1055                         die_error(404, "Invalid project_filter parameter");
1056                 }
1057         }
1058
1059         our $file_name = $input_params{'file_name'};
1060         if (defined $file_name) {
1061                 if (!is_valid_pathname($file_name)) {
1062                         die_error(400, "Invalid file parameter");
1063                 }
1064         }
1065
1066         our $file_parent = $input_params{'file_parent'};
1067         if (defined $file_parent) {
1068                 if (!is_valid_pathname($file_parent)) {
1069                         die_error(400, "Invalid file parent parameter");
1070                 }
1071         }
1072
1073         # parameters which are refnames
1074         our $hash = $input_params{'hash'};
1075         if (defined $hash) {
1076                 if (!is_valid_refname($hash)) {
1077                         die_error(400, "Invalid hash parameter");
1078                 }
1079         }
1080
1081         our $hash_parent = $input_params{'hash_parent'};
1082         if (defined $hash_parent) {
1083                 if (!is_valid_refname($hash_parent)) {
1084                         die_error(400, "Invalid hash parent parameter");
1085                 }
1086         }
1087
1088         our $hash_base = $input_params{'hash_base'};
1089         if (defined $hash_base) {
1090                 if (!is_valid_refname($hash_base)) {
1091                         die_error(400, "Invalid hash base parameter");
1092                 }
1093         }
1094
1095         our @extra_options = @{$input_params{'extra_options'}};
1096         # @extra_options is always defined, since it can only be (currently) set from
1097         # CGI, and $cgi->param() returns the empty array in array context if the param
1098         # is not set
1099         foreach my $opt (@extra_options) {
1100                 if (not exists $allowed_options{$opt}) {
1101                         die_error(400, "Invalid option parameter");
1102                 }
1103                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1104                         die_error(400, "Invalid option parameter for this action");
1105                 }
1106         }
1107
1108         our $hash_parent_base = $input_params{'hash_parent_base'};
1109         if (defined $hash_parent_base) {
1110                 if (!is_valid_refname($hash_parent_base)) {
1111                         die_error(400, "Invalid hash parent base parameter");
1112                 }
1113         }
1114
1115         # other parameters
1116         our $page = $input_params{'page'};
1117         if (defined $page) {
1118                 if ($page =~ m/[^0-9]/) {
1119                         die_error(400, "Invalid page parameter");
1120                 }
1121         }
1122
1123         our $searchtype = $input_params{'searchtype'};
1124         if (defined $searchtype) {
1125                 if ($searchtype =~ m/[^a-z]/) {
1126                         die_error(400, "Invalid searchtype parameter");
1127                 }
1128         }
1129
1130         our $search_use_regexp = $input_params{'search_use_regexp'};
1131
1132         our $searchtext = $input_params{'searchtext'};
1133         our $search_regexp = undef;
1134         if (defined $searchtext) {
1135                 if (length($searchtext) < 2) {
1136                         die_error(403, "At least two characters are required for search parameter");
1137                 }
1138                 if ($search_use_regexp) {
1139                         $search_regexp = $searchtext;
1140                         if (!eval { qr/$search_regexp/; 1; }) {
1141                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1142                                 die_error(400, "Invalid search regexp '$search_regexp'",
1143                                           esc_html($error));
1144                         }
1145                 } else {
1146                         $search_regexp = quotemeta $searchtext;
1147                 }
1148         }
1149 }
1150
1151 # path to the current git repository
1152 our $git_dir;
1153 sub evaluate_git_dir {
1154         our $git_dir = "$projectroot/$project" if $project;
1155 }
1156
1157 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1158 sub configure_gitweb_features {
1159         # list of supported snapshot formats
1160         our @snapshot_fmts = gitweb_get_feature('snapshot');
1161         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1162
1163         # check that the avatar feature is set to a known provider name,
1164         # and for each provider check if the dependencies are satisfied.
1165         # if the provider name is invalid or the dependencies are not met,
1166         # reset $git_avatar to the empty string.
1167         our ($git_avatar) = gitweb_get_feature('avatar');
1168         if ($git_avatar eq 'gravatar') {
1169                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1170         } elsif ($git_avatar eq 'picon') {
1171                 # no dependencies
1172         } else {
1173                 $git_avatar = '';
1174         }
1175
1176         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1177         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1178 }
1179
1180 sub get_branch_refs {
1181         return ('heads', @extra_branch_refs);
1182 }
1183
1184 # custom error handler: 'die <message>' is Internal Server Error
1185 sub handle_errors_html {
1186         my $msg = shift; # it is already HTML escaped
1187
1188         # to avoid infinite loop where error occurs in die_error,
1189         # change handler to default handler, disabling handle_errors_html
1190         set_message("Error occurred when inside die_error:\n$msg");
1191
1192         # you cannot jump out of die_error when called as error handler;
1193         # the subroutine set via CGI::Carp::set_message is called _after_
1194         # HTTP headers are already written, so it cannot write them itself
1195         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1196 }
1197 set_message(\&handle_errors_html);
1198
1199 # dispatch
1200 sub dispatch {
1201         if (!defined $action) {
1202                 if (defined $hash) {
1203                         $action = git_get_type($hash);
1204                         $action or die_error(404, "Object does not exist");
1205                 } elsif (defined $hash_base && defined $file_name) {
1206                         $action = git_get_type("$hash_base:$file_name");
1207                         $action or die_error(404, "File or directory does not exist");
1208                 } elsif (defined $project) {
1209                         $action = 'summary';
1210                 } else {
1211                         $action = 'project_list';
1212                 }
1213         }
1214         if (!defined($actions{$action})) {
1215                 die_error(400, "Unknown action");
1216         }
1217         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1218             !$project) {
1219                 die_error(400, "Project needed");
1220         }
1221         $actions{$action}->();
1222 }
1223
1224 sub reset_timer {
1225         our $t0 = [ gettimeofday() ]
1226                 if defined $t0;
1227         our $number_of_git_cmds = 0;
1228 }
1229
1230 our $first_request = 1;
1231 sub run_request {
1232         reset_timer();
1233
1234         evaluate_uri();
1235         if ($first_request) {
1236                 evaluate_gitweb_config();
1237                 evaluate_git_version();
1238         }
1239         if ($per_request_config) {
1240                 if (ref($per_request_config) eq 'CODE') {
1241                         $per_request_config->();
1242                 } elsif (!$first_request) {
1243                         evaluate_gitweb_config();
1244                 }
1245         }
1246         check_loadavg();
1247
1248         # $projectroot and $projects_list might be set in gitweb config file
1249         $projects_list ||= $projectroot;
1250
1251         evaluate_query_params();
1252         evaluate_path_info();
1253         evaluate_and_validate_params();
1254         evaluate_git_dir();
1255
1256         configure_gitweb_features();
1257
1258         dispatch();
1259 }
1260
1261 our $is_last_request = sub { 1 };
1262 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1263 our $CGI = 'CGI';
1264 our $cgi;
1265 sub configure_as_fcgi {
1266         require CGI::Fast;
1267         our $CGI = 'CGI::Fast';
1268
1269         my $request_number = 0;
1270         # let each child service 100 requests
1271         our $is_last_request = sub { ++$request_number > 100 };
1272 }
1273 sub evaluate_argv {
1274         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1275         configure_as_fcgi()
1276                 if $script_name =~ /\.fcgi$/;
1277
1278         return unless (@ARGV);
1279
1280         require Getopt::Long;
1281         Getopt::Long::GetOptions(
1282                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1283                 'nproc|n=i' => sub {
1284                         my ($arg, $val) = @_;
1285                         return unless eval { require FCGI::ProcManager; 1; };
1286                         my $proc_manager = FCGI::ProcManager->new({
1287                                 n_processes => $val,
1288                         });
1289                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1290                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1291                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1292                 },
1293         );
1294 }
1295
1296 sub run {
1297         evaluate_argv();
1298
1299         $first_request = 1;
1300         $pre_listen_hook->()
1301                 if $pre_listen_hook;
1302
1303  REQUEST:
1304         while ($cgi = $CGI->new()) {
1305                 $pre_dispatch_hook->()
1306                         if $pre_dispatch_hook;
1307
1308                 run_request();
1309
1310                 $post_dispatch_hook->()
1311                         if $post_dispatch_hook;
1312                 $first_request = 0;
1313
1314                 last REQUEST if ($is_last_request->());
1315         }
1316
1317  DONE_GITWEB:
1318         1;
1319 }
1320
1321 run();
1322
1323 if (defined caller) {
1324         # wrapped in a subroutine processing requests,
1325         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1326         return;
1327 } else {
1328         # pure CGI script, serving single request
1329         exit;
1330 }
1331
1332 ## ======================================================================
1333 ## action links
1334
1335 # possible values of extra options
1336 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1337 # -replay => 1      - start from a current view (replay with modifications)
1338 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1339 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1340 sub href {
1341         my %params = @_;
1342         # default is to use -absolute url() i.e. $my_uri
1343         my $href = $params{-full} ? $my_url : $my_uri;
1344
1345         # implicit -replay, must be first of implicit params
1346         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1347
1348         $params{'project'} = $project unless exists $params{'project'};
1349
1350         if ($params{-replay}) {
1351                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1352                         if (!exists $params{$name}) {
1353                                 $params{$name} = $input_params{$name};
1354                         }
1355                 }
1356         }
1357
1358         my $use_pathinfo = gitweb_check_feature('pathinfo');
1359         if (defined $params{'project'} &&
1360             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1361                 # try to put as many parameters as possible in PATH_INFO:
1362                 #   - project name
1363                 #   - action
1364                 #   - hash_parent or hash_parent_base:/file_parent
1365                 #   - hash or hash_base:/filename
1366                 #   - the snapshot_format as an appropriate suffix
1367
1368                 # When the script is the root DirectoryIndex for the domain,
1369                 # $href here would be something like http://gitweb.example.com/
1370                 # Thus, we strip any trailing / from $href, to spare us double
1371                 # slashes in the final URL
1372                 $href =~ s,/$,,;
1373
1374                 # Then add the project name, if present
1375                 $href .= "/".esc_path_info($params{'project'});
1376                 delete $params{'project'};
1377
1378                 # since we destructively absorb parameters, we keep this
1379                 # boolean that remembers if we're handling a snapshot
1380                 my $is_snapshot = $params{'action'} eq 'snapshot';
1381
1382                 # Summary just uses the project path URL, any other action is
1383                 # added to the URL
1384                 if (defined $params{'action'}) {
1385                         $href .= "/".esc_path_info($params{'action'})
1386                                 unless $params{'action'} eq 'summary';
1387                         delete $params{'action'};
1388                 }
1389
1390                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1391                 # stripping nonexistent or useless pieces
1392                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1393                         || $params{'hash_parent'} || $params{'hash'});
1394                 if (defined $params{'hash_base'}) {
1395                         if (defined $params{'hash_parent_base'}) {
1396                                 $href .= esc_path_info($params{'hash_parent_base'});
1397                                 # skip the file_parent if it's the same as the file_name
1398                                 if (defined $params{'file_parent'}) {
1399                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1400                                                 delete $params{'file_parent'};
1401                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1402                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1403                                                 delete $params{'file_parent'};
1404                                         }
1405                                 }
1406                                 $href .= "..";
1407                                 delete $params{'hash_parent'};
1408                                 delete $params{'hash_parent_base'};
1409                         } elsif (defined $params{'hash_parent'}) {
1410                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1411                                 delete $params{'hash_parent'};
1412                         }
1413
1414                         $href .= esc_path_info($params{'hash_base'});
1415                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1416                                 $href .= ":/".esc_path_info($params{'file_name'});
1417                                 delete $params{'file_name'};
1418                         }
1419                         delete $params{'hash'};
1420                         delete $params{'hash_base'};
1421                 } elsif (defined $params{'hash'}) {
1422                         $href .= esc_path_info($params{'hash'});
1423                         delete $params{'hash'};
1424                 }
1425
1426                 # If the action was a snapshot, we can absorb the
1427                 # snapshot_format parameter too
1428                 if ($is_snapshot) {
1429                         my $fmt = $params{'snapshot_format'};
1430                         # snapshot_format should always be defined when href()
1431                         # is called, but just in case some code forgets, we
1432                         # fall back to the default
1433                         $fmt ||= $snapshot_fmts[0];
1434                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1435                         delete $params{'snapshot_format'};
1436                 }
1437         }
1438
1439         # now encode the parameters explicitly
1440         my @result = ();
1441         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1442                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1443                 if (defined $params{$name}) {
1444                         if (ref($params{$name}) eq "ARRAY") {
1445                                 foreach my $par (@{$params{$name}}) {
1446                                         push @result, $symbol . "=" . esc_param($par);
1447                                 }
1448                         } else {
1449                                 push @result, $symbol . "=" . esc_param($params{$name});
1450                         }
1451                 }
1452         }
1453         $href .= "?" . join(';', @result) if scalar @result;
1454
1455         # final transformation: trailing spaces must be escaped (URI-encoded)
1456         $href =~ s/(\s+)$/CGI::escape($1)/e;
1457
1458         if ($params{-anchor}) {
1459                 $href .= "#".esc_param($params{-anchor});
1460         }
1461
1462         return $href;
1463 }
1464
1465
1466 ## ======================================================================
1467 ## validation, quoting/unquoting and escaping
1468
1469 sub is_valid_action {
1470         my $input = shift;
1471         return undef unless exists $actions{$input};
1472         return 1;
1473 }
1474
1475 sub is_valid_project {
1476         my $input = shift;
1477
1478         return unless defined $input;
1479         if (!is_valid_pathname($input) ||
1480                 !(-d "$projectroot/$input") ||
1481                 !check_export_ok("$projectroot/$input") ||
1482                 ($strict_export && !project_in_list($input))) {
1483                 return undef;
1484         } else {
1485                 return 1;
1486         }
1487 }
1488
1489 sub is_valid_pathname {
1490         my $input = shift;
1491
1492         return undef unless defined $input;
1493         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1494         # at the beginning, at the end, and between slashes.
1495         # also this catches doubled slashes
1496         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1497                 return undef;
1498         }
1499         # no null characters
1500         if ($input =~ m!\0!) {
1501                 return undef;
1502         }
1503         return 1;
1504 }
1505
1506 sub is_valid_ref_format {
1507         my $input = shift;
1508
1509         return undef unless defined $input;
1510         # restrictions on ref name according to git-check-ref-format
1511         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1512                 return undef;
1513         }
1514         return 1;
1515 }
1516
1517 sub is_valid_refname {
1518         my $input = shift;
1519
1520         return undef unless defined $input;
1521         # textual hashes are O.K.
1522         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1523                 return 1;
1524         }
1525         # it must be correct pathname
1526         is_valid_pathname($input) or return undef;
1527         # check git-check-ref-format restrictions
1528         is_valid_ref_format($input) or return undef;
1529         return 1;
1530 }
1531
1532 # decode sequences of octets in utf8 into Perl's internal form,
1533 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1534 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1535 sub to_utf8 {
1536         my $str = shift;
1537         return undef unless defined $str;
1538
1539         if (utf8::is_utf8($str) || utf8::decode($str)) {
1540                 return $str;
1541         } else {
1542                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1543         }
1544 }
1545
1546 # quote unsafe chars, but keep the slash, even when it's not
1547 # correct, but quoted slashes look too horrible in bookmarks
1548 sub esc_param {
1549         my $str = shift;
1550         return undef unless defined $str;
1551         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1552         $str =~ s/ /\+/g;
1553         return $str;
1554 }
1555
1556 # the quoting rules for path_info fragment are slightly different
1557 sub esc_path_info {
1558         my $str = shift;
1559         return undef unless defined $str;
1560
1561         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1562         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1563
1564         return $str;
1565 }
1566
1567 # quote unsafe chars in whole URL, so some characters cannot be quoted
1568 sub esc_url {
1569         my $str = shift;
1570         return undef unless defined $str;
1571         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1572         $str =~ s/ /\+/g;
1573         return $str;
1574 }
1575
1576 # quote unsafe characters in HTML attributes
1577 sub esc_attr {
1578
1579         # for XHTML conformance escaping '"' to '&quot;' is not enough
1580         return esc_html(@_);
1581 }
1582
1583 # replace invalid utf8 character with SUBSTITUTION sequence
1584 sub esc_html {
1585         my $str = shift;
1586         my %opts = @_;
1587
1588         return undef unless defined $str;
1589
1590         $str = to_utf8($str);
1591         $str = $cgi->escapeHTML($str);
1592         if ($opts{'-nbsp'}) {
1593                 $str =~ s/ /&nbsp;/g;
1594         }
1595         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1596         return $str;
1597 }
1598
1599 # quote control characters and escape filename to HTML
1600 sub esc_path {
1601         my $str = shift;
1602         my %opts = @_;
1603
1604         return undef unless defined $str;
1605
1606         $str = to_utf8($str);
1607         $str = $cgi->escapeHTML($str);
1608         if ($opts{'-nbsp'}) {
1609                 $str =~ s/ /&nbsp;/g;
1610         }
1611         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1612         return $str;
1613 }
1614
1615 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1616 sub sanitize {
1617         my $str = shift;
1618
1619         return undef unless defined $str;
1620
1621         $str = to_utf8($str);
1622         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1623         return $str;
1624 }
1625
1626 # Make control characters "printable", using character escape codes (CEC)
1627 sub quot_cec {
1628         my $cntrl = shift;
1629         my %opts = @_;
1630         my %es = ( # character escape codes, aka escape sequences
1631                 "\t" => '\t',   # tab            (HT)
1632                 "\n" => '\n',   # line feed      (LF)
1633                 "\r" => '\r',   # carrige return (CR)
1634                 "\f" => '\f',   # form feed      (FF)
1635                 "\b" => '\b',   # backspace      (BS)
1636                 "\a" => '\a',   # alarm (bell)   (BEL)
1637                 "\e" => '\e',   # escape         (ESC)
1638                 "\013" => '\v', # vertical tab   (VT)
1639                 "\000" => '\0', # nul character  (NUL)
1640         );
1641         my $chr = ( (exists $es{$cntrl})
1642                     ? $es{$cntrl}
1643                     : sprintf('\%2x', ord($cntrl)) );
1644         if ($opts{-nohtml}) {
1645                 return $chr;
1646         } else {
1647                 return "<span class=\"cntrl\">$chr</span>";
1648         }
1649 }
1650
1651 # Alternatively use unicode control pictures codepoints,
1652 # Unicode "printable representation" (PR)
1653 sub quot_upr {
1654         my $cntrl = shift;
1655         my %opts = @_;
1656
1657         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1658         if ($opts{-nohtml}) {
1659                 return $chr;
1660         } else {
1661                 return "<span class=\"cntrl\">$chr</span>";
1662         }
1663 }
1664
1665 # git may return quoted and escaped filenames
1666 sub unquote {
1667         my $str = shift;
1668
1669         sub unq {
1670                 my $seq = shift;
1671                 my %es = ( # character escape codes, aka escape sequences
1672                         't' => "\t",   # tab            (HT, TAB)
1673                         'n' => "\n",   # newline        (NL)
1674                         'r' => "\r",   # return         (CR)
1675                         'f' => "\f",   # form feed      (FF)
1676                         'b' => "\b",   # backspace      (BS)
1677                         'a' => "\a",   # alarm (bell)   (BEL)
1678                         'e' => "\e",   # escape         (ESC)
1679                         'v' => "\013", # vertical tab   (VT)
1680                 );
1681
1682                 if ($seq =~ m/^[0-7]{1,3}$/) {
1683                         # octal char sequence
1684                         return chr(oct($seq));
1685                 } elsif (exists $es{$seq}) {
1686                         # C escape sequence, aka character escape code
1687                         return $es{$seq};
1688                 }
1689                 # quoted ordinary character
1690                 return $seq;
1691         }
1692
1693         if ($str =~ m/^"(.*)"$/) {
1694                 # needs unquoting
1695                 $str = $1;
1696                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1697         }
1698         return $str;
1699 }
1700
1701 # escape tabs (convert tabs to spaces)
1702 sub untabify {
1703         my $line = shift;
1704
1705         while ((my $pos = index($line, "\t")) != -1) {
1706                 if (my $count = (8 - ($pos % 8))) {
1707                         my $spaces = ' ' x $count;
1708                         $line =~ s/\t/$spaces/;
1709                 }
1710         }
1711
1712         return $line;
1713 }
1714
1715 sub project_in_list {
1716         my $project = shift;
1717         my @list = git_get_projects_list();
1718         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1719 }
1720
1721 ## ----------------------------------------------------------------------
1722 ## HTML aware string manipulation
1723
1724 # Try to chop given string on a word boundary between position
1725 # $len and $len+$add_len. If there is no word boundary there,
1726 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1727 # (marking chopped part) would be longer than given string.
1728 sub chop_str {
1729         my $str = shift;
1730         my $len = shift;
1731         my $add_len = shift || 10;
1732         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1733
1734         # Make sure perl knows it is utf8 encoded so we don't
1735         # cut in the middle of a utf8 multibyte char.
1736         $str = to_utf8($str);
1737
1738         # allow only $len chars, but don't cut a word if it would fit in $add_len
1739         # if it doesn't fit, cut it if it's still longer than the dots we would add
1740         # remove chopped character entities entirely
1741
1742         # when chopping in the middle, distribute $len into left and right part
1743         # return early if chopping wouldn't make string shorter
1744         if ($where eq 'center') {
1745                 return $str if ($len + 5 >= length($str)); # filler is length 5
1746                 $len = int($len/2);
1747         } else {
1748                 return $str if ($len + 4 >= length($str)); # filler is length 4
1749         }
1750
1751         # regexps: ending and beginning with word part up to $add_len
1752         my $endre = qr/.{$len}\w{0,$add_len}/;
1753         my $begre = qr/\w{0,$add_len}.{$len}/;
1754
1755         if ($where eq 'left') {
1756                 $str =~ m/^(.*?)($begre)$/;
1757                 my ($lead, $body) = ($1, $2);
1758                 if (length($lead) > 4) {
1759                         $lead = " ...";
1760                 }
1761                 return "$lead$body";
1762
1763         } elsif ($where eq 'center') {
1764                 $str =~ m/^($endre)(.*)$/;
1765                 my ($left, $str)  = ($1, $2);
1766                 $str =~ m/^(.*?)($begre)$/;
1767                 my ($mid, $right) = ($1, $2);
1768                 if (length($mid) > 5) {
1769                         $mid = " ... ";
1770                 }
1771                 return "$left$mid$right";
1772
1773         } else {
1774                 $str =~ m/^($endre)(.*)$/;
1775                 my $body = $1;
1776                 my $tail = $2;
1777                 if (length($tail) > 4) {
1778                         $tail = "... ";
1779                 }
1780                 return "$body$tail";
1781         }
1782 }
1783
1784 # takes the same arguments as chop_str, but also wraps a <span> around the
1785 # result with a title attribute if it does get chopped. Additionally, the
1786 # string is HTML-escaped.
1787 sub chop_and_escape_str {
1788         my ($str) = @_;
1789
1790         my $chopped = chop_str(@_);
1791         $str = to_utf8($str);
1792         if ($chopped eq $str) {
1793                 return esc_html($chopped);
1794         } else {
1795                 $str =~ s/[[:cntrl:]]/?/g;
1796                 return $cgi->span({-title=>$str}, esc_html($chopped));
1797         }
1798 }
1799
1800 # Highlight selected fragments of string, using given CSS class,
1801 # and escape HTML.  It is assumed that fragments do not overlap.
1802 # Regions are passed as list of pairs (array references).
1803 #
1804 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1805 # '<span class="mark">foo</span>bar'
1806 sub esc_html_hl_regions {
1807         my ($str, $css_class, @sel) = @_;
1808         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1809         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1810         return esc_html($str, %opts) unless @sel;
1811
1812         my $out = '';
1813         my $pos = 0;
1814
1815         for my $s (@sel) {
1816                 my ($begin, $end) = @$s;
1817
1818                 # Don't create empty <span> elements.
1819                 next if $end <= $begin;
1820
1821                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1822                                        %opts);
1823
1824                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1825                         if ($begin - $pos > 0);
1826                 $out .= $cgi->span({-class => $css_class}, $escaped);
1827
1828                 $pos = $end;
1829         }
1830         $out .= esc_html(substr($str, $pos), %opts)
1831                 if ($pos < length($str));
1832
1833         return $out;
1834 }
1835
1836 # return positions of beginning and end of each match
1837 sub matchpos_list {
1838         my ($str, $regexp) = @_;
1839         return unless (defined $str && defined $regexp);
1840
1841         my @matches;
1842         while ($str =~ /$regexp/g) {
1843                 push @matches, [$-[0], $+[0]];
1844         }
1845         return @matches;
1846 }
1847
1848 # highlight match (if any), and escape HTML
1849 sub esc_html_match_hl {
1850         my ($str, $regexp) = @_;
1851         return esc_html($str) unless defined $regexp;
1852
1853         my @matches = matchpos_list($str, $regexp);
1854         return esc_html($str) unless @matches;
1855
1856         return esc_html_hl_regions($str, 'match', @matches);
1857 }
1858
1859
1860 # highlight match (if any) of shortened string, and escape HTML
1861 sub esc_html_match_hl_chopped {
1862         my ($str, $chopped, $regexp) = @_;
1863         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1864
1865         my @matches = matchpos_list($str, $regexp);
1866         return esc_html($chopped) unless @matches;
1867
1868         # filter matches so that we mark chopped string
1869         my $tail = "... "; # see chop_str
1870         unless ($chopped =~ s/\Q$tail\E$//) {
1871                 $tail = '';
1872         }
1873         my $chop_len = length($chopped);
1874         my $tail_len = length($tail);
1875         my @filtered;
1876
1877         for my $m (@matches) {
1878                 if ($m->[0] > $chop_len) {
1879                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1880                         last;
1881                 } elsif ($m->[1] > $chop_len) {
1882                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1883                         last;
1884                 }
1885                 push @filtered, $m;
1886         }
1887
1888         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1889 }
1890
1891 ## ----------------------------------------------------------------------
1892 ## functions returning short strings
1893
1894 # CSS class for given age value (in seconds)
1895 sub age_class {
1896         my $age = shift;
1897
1898         if (!defined $age) {
1899                 return "noage";
1900         } elsif ($age < 60*60*2) {
1901                 return "age0";
1902         } elsif ($age < 60*60*24*2) {
1903                 return "age1";
1904         } else {
1905                 return "age2";
1906         }
1907 }
1908
1909 # convert age in seconds to "nn units ago" string
1910 sub age_string {
1911         my $age = shift;
1912         my $age_str;
1913
1914         if ($age > 60*60*24*365*2) {
1915                 $age_str = (int $age/60/60/24/365);
1916                 $age_str .= " years ago";
1917         } elsif ($age > 60*60*24*(365/12)*2) {
1918                 $age_str = int $age/60/60/24/(365/12);
1919                 $age_str .= " months ago";
1920         } elsif ($age > 60*60*24*7*2) {
1921                 $age_str = int $age/60/60/24/7;
1922                 $age_str .= " weeks ago";
1923         } elsif ($age > 60*60*24*2) {
1924                 $age_str = int $age/60/60/24;
1925                 $age_str .= " days ago";
1926         } elsif ($age > 60*60*2) {
1927                 $age_str = int $age/60/60;
1928                 $age_str .= " hours ago";
1929         } elsif ($age > 60*2) {
1930                 $age_str = int $age/60;
1931                 $age_str .= " min ago";
1932         } elsif ($age > 2) {
1933                 $age_str = int $age;
1934                 $age_str .= " sec ago";
1935         } else {
1936                 $age_str .= " right now";
1937         }
1938         return $age_str;
1939 }
1940
1941 use constant {
1942         S_IFINVALID => 0030000,
1943         S_IFGITLINK => 0160000,
1944 };
1945
1946 # submodule/subproject, a commit object reference
1947 sub S_ISGITLINK {
1948         my $mode = shift;
1949
1950         return (($mode & S_IFMT) == S_IFGITLINK)
1951 }
1952
1953 # convert file mode in octal to symbolic file mode string
1954 sub mode_str {
1955         my $mode = oct shift;
1956
1957         if (S_ISGITLINK($mode)) {
1958                 return 'm---------';
1959         } elsif (S_ISDIR($mode & S_IFMT)) {
1960                 return 'drwxr-xr-x';
1961         } elsif (S_ISLNK($mode)) {
1962                 return 'lrwxrwxrwx';
1963         } elsif (S_ISREG($mode)) {
1964                 # git cares only about the executable bit
1965                 if ($mode & S_IXUSR) {
1966                         return '-rwxr-xr-x';
1967                 } else {
1968                         return '-rw-r--r--';
1969                 };
1970         } else {
1971                 return '----------';
1972         }
1973 }
1974
1975 # convert file mode in octal to file type string
1976 sub file_type {
1977         my $mode = shift;
1978
1979         if ($mode !~ m/^[0-7]+$/) {
1980                 return $mode;
1981         } else {
1982                 $mode = oct $mode;
1983         }
1984
1985         if (S_ISGITLINK($mode)) {
1986                 return "submodule";
1987         } elsif (S_ISDIR($mode & S_IFMT)) {
1988                 return "directory";
1989         } elsif (S_ISLNK($mode)) {
1990                 return "symlink";
1991         } elsif (S_ISREG($mode)) {
1992                 return "file";
1993         } else {
1994                 return "unknown";
1995         }
1996 }
1997
1998 # convert file mode in octal to file type description string
1999 sub file_type_long {
2000         my $mode = shift;
2001
2002         if ($mode !~ m/^[0-7]+$/) {
2003                 return $mode;
2004         } else {
2005                 $mode = oct $mode;
2006         }
2007
2008         if (S_ISGITLINK($mode)) {
2009                 return "submodule";
2010         } elsif (S_ISDIR($mode & S_IFMT)) {
2011                 return "directory";
2012         } elsif (S_ISLNK($mode)) {
2013                 return "symlink";
2014         } elsif (S_ISREG($mode)) {
2015                 if ($mode & S_IXUSR) {
2016                         return "executable";
2017                 } else {
2018                         return "file";
2019                 };
2020         } else {
2021                 return "unknown";
2022         }
2023 }
2024
2025
2026 ## ----------------------------------------------------------------------
2027 ## functions returning short HTML fragments, or transforming HTML fragments
2028 ## which don't belong to other sections
2029
2030 # format line of commit message.
2031 sub format_log_line_html {
2032         my $line = shift;
2033
2034         $line = esc_html($line, -nbsp=>1);
2035         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2036                 $cgi->a({-href => href(action=>"object", hash=>$1),
2037                                         -class => "text"}, $1);
2038         }eg;
2039
2040         return $line;
2041 }
2042
2043 # format marker of refs pointing to given object
2044
2045 # the destination action is chosen based on object type and current context:
2046 # - for annotated tags, we choose the tag view unless it's the current view
2047 #   already, in which case we go to shortlog view
2048 # - for other refs, we keep the current view if we're in history, shortlog or
2049 #   log view, and select shortlog otherwise
2050 sub format_ref_marker {
2051         my ($refs, $id) = @_;
2052         my $markers = '';
2053
2054         if (defined $refs->{$id}) {
2055                 foreach my $ref (@{$refs->{$id}}) {
2056                         # this code exploits the fact that non-lightweight tags are the
2057                         # only indirect objects, and that they are the only objects for which
2058                         # we want to use tag instead of shortlog as action
2059                         my ($type, $name) = qw();
2060                         my $indirect = ($ref =~ s/\^\{\}$//);
2061                         # e.g. tags/v2.6.11 or heads/next
2062                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2063                                 $type = $1;
2064                                 $name = $2;
2065                         } else {
2066                                 $type = "ref";
2067                                 $name = $ref;
2068                         }
2069
2070                         my $class = $type;
2071                         $class .= " indirect" if $indirect;
2072
2073                         my $dest_action = "shortlog";
2074
2075                         if ($indirect) {
2076                                 $dest_action = "tag" unless $action eq "tag";
2077                         } elsif ($action =~ /^(history|(short)?log)$/) {
2078                                 $dest_action = $action;
2079                         }
2080
2081                         my $dest = "";
2082                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2083                         $dest .= $ref;
2084
2085                         my $link = $cgi->a({
2086                                 -href => href(
2087                                         action=>$dest_action,
2088                                         hash=>$dest
2089                                 )}, $name);
2090
2091                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2092                                 $link . "</span>";
2093                 }
2094         }
2095
2096         if ($markers) {
2097                 return ' <span class="refs">'. $markers . '</span>';
2098         } else {
2099                 return "";
2100         }
2101 }
2102
2103 # format, perhaps shortened and with markers, title line
2104 sub format_subject_html {
2105         my ($long, $short, $href, $extra) = @_;
2106         $extra = '' unless defined($extra);
2107
2108         if (length($short) < length($long)) {
2109                 $long =~ s/[[:cntrl:]]/?/g;
2110                 return $cgi->a({-href => $href, -class => "list subject",
2111                                 -title => to_utf8($long)},
2112                        esc_html($short)) . $extra;
2113         } else {
2114                 return $cgi->a({-href => $href, -class => "list subject"},
2115                        esc_html($long)) . $extra;
2116         }
2117 }
2118
2119 # Rather than recomputing the url for an email multiple times, we cache it
2120 # after the first hit. This gives a visible benefit in views where the avatar
2121 # for the same email is used repeatedly (e.g. shortlog).
2122 # The cache is shared by all avatar engines (currently gravatar only), which
2123 # are free to use it as preferred. Since only one avatar engine is used for any
2124 # given page, there's no risk for cache conflicts.
2125 our %avatar_cache = ();
2126
2127 # Compute the picon url for a given email, by using the picon search service over at
2128 # http://www.cs.indiana.edu/picons/search.html
2129 sub picon_url {
2130         my $email = lc shift;
2131         if (!$avatar_cache{$email}) {
2132                 my ($user, $domain) = split('@', $email);
2133                 $avatar_cache{$email} =
2134                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2135                         "$domain/$user/" .
2136                         "users+domains+unknown/up/single";
2137         }
2138         return $avatar_cache{$email};
2139 }
2140
2141 # Compute the gravatar url for a given email, if it's not in the cache already.
2142 # Gravatar stores only the part of the URL before the size, since that's the
2143 # one computationally more expensive. This also allows reuse of the cache for
2144 # different sizes (for this particular engine).
2145 sub gravatar_url {
2146         my $email = lc shift;
2147         my $size = shift;
2148         $avatar_cache{$email} ||=
2149                 "//www.gravatar.com/avatar/" .
2150                         Digest::MD5::md5_hex($email) . "?s=";
2151         return $avatar_cache{$email} . $size;
2152 }
2153
2154 # Insert an avatar for the given $email at the given $size if the feature
2155 # is enabled.
2156 sub git_get_avatar {
2157         my ($email, %opts) = @_;
2158         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2159         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2160         $opts{-size} ||= 'default';
2161         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2162         my $url = "";
2163         if ($git_avatar eq 'gravatar') {
2164                 $url = gravatar_url($email, $size);
2165         } elsif ($git_avatar eq 'picon') {
2166                 $url = picon_url($email);
2167         }
2168         # Other providers can be added by extending the if chain, defining $url
2169         # as needed. If no variant puts something in $url, we assume avatars
2170         # are completely disabled/unavailable.
2171         if ($url) {
2172                 return $pre_white .
2173                        "<img width=\"$size\" " .
2174                             "class=\"avatar\" " .
2175                             "src=\"".esc_url($url)."\" " .
2176                             "alt=\"\" " .
2177                        "/>" . $post_white;
2178         } else {
2179                 return "";
2180         }
2181 }
2182
2183 sub format_search_author {
2184         my ($author, $searchtype, $displaytext) = @_;
2185         my $have_search = gitweb_check_feature('search');
2186
2187         if ($have_search) {
2188                 my $performed = "";
2189                 if ($searchtype eq 'author') {
2190                         $performed = "authored";
2191                 } elsif ($searchtype eq 'committer') {
2192                         $performed = "committed";
2193                 }
2194
2195                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2196                                 searchtext=>$author,
2197                                 searchtype=>$searchtype), class=>"list",
2198                                 title=>"Search for commits $performed by $author"},
2199                                 $displaytext);
2200
2201         } else {
2202                 return $displaytext;
2203         }
2204 }
2205
2206 # format the author name of the given commit with the given tag
2207 # the author name is chopped and escaped according to the other
2208 # optional parameters (see chop_str).
2209 sub format_author_html {
2210         my $tag = shift;
2211         my $co = shift;
2212         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2213         return "<$tag class=\"author\">" .
2214                format_search_author($co->{'author_name'}, "author",
2215                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2216                        $author) .
2217                "</$tag>";
2218 }
2219
2220 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2221 sub format_git_diff_header_line {
2222         my $line = shift;
2223         my $diffinfo = shift;
2224         my ($from, $to) = @_;
2225
2226         if ($diffinfo->{'nparents'}) {
2227                 # combined diff
2228                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2229                 if ($to->{'href'}) {
2230                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2231                                          esc_path($to->{'file'}));
2232                 } else { # file was deleted (no href)
2233                         $line .= esc_path($to->{'file'});
2234                 }
2235         } else {
2236                 # "ordinary" diff
2237                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2238                 if ($from->{'href'}) {
2239                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2240                                          'a/' . esc_path($from->{'file'}));
2241                 } else { # file was added (no href)
2242                         $line .= 'a/' . esc_path($from->{'file'});
2243                 }
2244                 $line .= ' ';
2245                 if ($to->{'href'}) {
2246                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2247                                          'b/' . esc_path($to->{'file'}));
2248                 } else { # file was deleted
2249                         $line .= 'b/' . esc_path($to->{'file'});
2250                 }
2251         }
2252
2253         return "<div class=\"diff header\">$line</div>\n";
2254 }
2255
2256 # format extended diff header line, before patch itself
2257 sub format_extended_diff_header_line {
2258         my $line = shift;
2259         my $diffinfo = shift;
2260         my ($from, $to) = @_;
2261
2262         # match <path>
2263         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2264                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2265                                        esc_path($from->{'file'}));
2266         }
2267         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2268                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2269                                  esc_path($to->{'file'}));
2270         }
2271         # match single <mode>
2272         if ($line =~ m/\s(\d{6})$/) {
2273                 $line .= '<span class="info"> (' .
2274                          file_type_long($1) .
2275                          ')</span>';
2276         }
2277         # match <hash>
2278         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2279                 # can match only for combined diff
2280                 $line = 'index ';
2281                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2282                         if ($from->{'href'}[$i]) {
2283                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2284                                                   -class=>"hash"},
2285                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2286                         } else {
2287                                 $line .= '0' x 7;
2288                         }
2289                         # separator
2290                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2291                 }
2292                 $line .= '..';
2293                 if ($to->{'href'}) {
2294                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2295                                          substr($diffinfo->{'to_id'},0,7));
2296                 } else {
2297                         $line .= '0' x 7;
2298                 }
2299
2300         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2301                 # can match only for ordinary diff
2302                 my ($from_link, $to_link);
2303                 if ($from->{'href'}) {
2304                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2305                                              substr($diffinfo->{'from_id'},0,7));
2306                 } else {
2307                         $from_link = '0' x 7;
2308                 }
2309                 if ($to->{'href'}) {
2310                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2311                                            substr($diffinfo->{'to_id'},0,7));
2312                 } else {
2313                         $to_link = '0' x 7;
2314                 }
2315                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2316                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2317         }
2318
2319         return $line . "<br/>\n";
2320 }
2321
2322 # format from-file/to-file diff header
2323 sub format_diff_from_to_header {
2324         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2325         my $line;
2326         my $result = '';
2327
2328         $line = $from_line;
2329         #assert($line =~ m/^---/) if DEBUG;
2330         # no extra formatting for "^--- /dev/null"
2331         if (! $diffinfo->{'nparents'}) {
2332                 # ordinary (single parent) diff
2333                 if ($line =~ m!^--- "?a/!) {
2334                         if ($from->{'href'}) {
2335                                 $line = '--- a/' .
2336                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2337                                                 esc_path($from->{'file'}));
2338                         } else {
2339                                 $line = '--- a/' .
2340                                         esc_path($from->{'file'});
2341                         }
2342                 }
2343                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2344
2345         } else {
2346                 # combined diff (merge commit)
2347                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2348                         if ($from->{'href'}[$i]) {
2349                                 $line = '--- ' .
2350                                         $cgi->a({-href=>href(action=>"blobdiff",
2351                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2352                                                              hash_parent_base=>$parents[$i],
2353                                                              file_parent=>$from->{'file'}[$i],
2354                                                              hash=>$diffinfo->{'to_id'},
2355                                                              hash_base=>$hash,
2356                                                              file_name=>$to->{'file'}),
2357                                                  -class=>"path",
2358                                                  -title=>"diff" . ($i+1)},
2359                                                 $i+1) .
2360                                         '/' .
2361                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2362                                                 esc_path($from->{'file'}[$i]));
2363                         } else {
2364                                 $line = '--- /dev/null';
2365                         }
2366                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2367                 }
2368         }
2369
2370         $line = $to_line;
2371         #assert($line =~ m/^\+\+\+/) if DEBUG;
2372         # no extra formatting for "^+++ /dev/null"
2373         if ($line =~ m!^\+\+\+ "?b/!) {
2374                 if ($to->{'href'}) {
2375                         $line = '+++ b/' .
2376                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2377                                         esc_path($to->{'file'}));
2378                 } else {
2379                         $line = '+++ b/' .
2380                                 esc_path($to->{'file'});
2381                 }
2382         }
2383         $result .= qq!<div class="diff to_file">$line</div>\n!;
2384
2385         return $result;
2386 }
2387
2388 # create note for patch simplified by combined diff
2389 sub format_diff_cc_simplified {
2390         my ($diffinfo, @parents) = @_;
2391         my $result = '';
2392
2393         $result .= "<div class=\"diff header\">" .
2394                    "diff --cc ";
2395         if (!is_deleted($diffinfo)) {
2396                 $result .= $cgi->a({-href => href(action=>"blob",
2397                                                   hash_base=>$hash,
2398                                                   hash=>$diffinfo->{'to_id'},
2399                                                   file_name=>$diffinfo->{'to_file'}),
2400                                     -class => "path"},
2401                                    esc_path($diffinfo->{'to_file'}));
2402         } else {
2403                 $result .= esc_path($diffinfo->{'to_file'});
2404         }
2405         $result .= "</div>\n" . # class="diff header"
2406                    "<div class=\"diff nodifferences\">" .
2407                    "Simple merge" .
2408                    "</div>\n"; # class="diff nodifferences"
2409
2410         return $result;
2411 }
2412
2413 sub diff_line_class {
2414         my ($line, $from, $to) = @_;
2415
2416         # ordinary diff
2417         my $num_sign = 1;
2418         # combined diff
2419         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2420                 $num_sign = scalar @{$from->{'href'}};
2421         }
2422
2423         my @diff_line_classifier = (
2424                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2425                 { regexp => qr/^\\/,               class => "incomplete"  },
2426                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2427                 # classifier for context must come before classifier add/rem,
2428                 # or we would have to use more complicated regexp, for example
2429                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2430                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2431                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2432         );
2433         for my $clsfy (@diff_line_classifier) {
2434                 return $clsfy->{'class'}
2435                         if ($line =~ $clsfy->{'regexp'});
2436         }
2437
2438         # fallback
2439         return "";
2440 }
2441
2442 # assumes that $from and $to are defined and correctly filled,
2443 # and that $line holds a line of chunk header for unified diff
2444 sub format_unidiff_chunk_header {
2445         my ($line, $from, $to) = @_;
2446
2447         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2448                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2449
2450         $from_lines = 0 unless defined $from_lines;
2451         $to_lines   = 0 unless defined $to_lines;
2452
2453         if ($from->{'href'}) {
2454                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2455                                      -class=>"list"}, $from_text);
2456         }
2457         if ($to->{'href'}) {
2458                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2459                                      -class=>"list"}, $to_text);
2460         }
2461         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2462                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2463         return $line;
2464 }
2465
2466 # assumes that $from and $to are defined and correctly filled,
2467 # and that $line holds a line of chunk header for combined diff
2468 sub format_cc_diff_chunk_header {
2469         my ($line, $from, $to) = @_;
2470
2471         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2472         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2473
2474         @from_text = split(' ', $ranges);
2475         for (my $i = 0; $i < @from_text; ++$i) {
2476                 ($from_start[$i], $from_nlines[$i]) =
2477                         (split(',', substr($from_text[$i], 1)), 0);
2478         }
2479
2480         $to_text   = pop @from_text;
2481         $to_start  = pop @from_start;
2482         $to_nlines = pop @from_nlines;
2483
2484         $line = "<span class=\"chunk_info\">$prefix ";
2485         for (my $i = 0; $i < @from_text; ++$i) {
2486                 if ($from->{'href'}[$i]) {
2487                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2488                                           -class=>"list"}, $from_text[$i]);
2489                 } else {
2490                         $line .= $from_text[$i];
2491                 }
2492                 $line .= " ";
2493         }
2494         if ($to->{'href'}) {
2495                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2496                                   -class=>"list"}, $to_text);
2497         } else {
2498                 $line .= $to_text;
2499         }
2500         $line .= " $prefix</span>" .
2501                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2502         return $line;
2503 }
2504
2505 # process patch (diff) line (not to be used for diff headers),
2506 # returning HTML-formatted (but not wrapped) line.
2507 # If the line is passed as a reference, it is treated as HTML and not
2508 # esc_html()'ed.
2509 sub format_diff_line {
2510         my ($line, $diff_class, $from, $to) = @_;
2511
2512         if (ref($line)) {
2513                 $line = $$line;
2514         } else {
2515                 chomp $line;
2516                 $line = untabify($line);
2517
2518                 if ($from && $to && $line =~ m/^\@{2} /) {
2519                         $line = format_unidiff_chunk_header($line, $from, $to);
2520                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2521                         $line = format_cc_diff_chunk_header($line, $from, $to);
2522                 } else {
2523                         $line = esc_html($line, -nbsp=>1);
2524                 }
2525         }
2526
2527         my $diff_classes = "diff";
2528         $diff_classes .= " $diff_class" if ($diff_class);
2529         $line = "<div class=\"$diff_classes\">$line</div>\n";
2530
2531         return $line;
2532 }
2533
2534 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2535 # linked.  Pass the hash of the tree/commit to snapshot.
2536 sub format_snapshot_links {
2537         my ($hash) = @_;
2538         my $num_fmts = @snapshot_fmts;
2539         if ($num_fmts > 1) {
2540                 # A parenthesized list of links bearing format names.
2541                 # e.g. "snapshot (_tar.gz_ _zip_)"
2542                 return "snapshot (" . join(' ', map
2543                         $cgi->a({
2544                                 -href => href(
2545                                         action=>"snapshot",
2546                                         hash=>$hash,
2547                                         snapshot_format=>$_
2548                                 )
2549                         }, $known_snapshot_formats{$_}{'display'})
2550                 , @snapshot_fmts) . ")";
2551         } elsif ($num_fmts == 1) {
2552                 # A single "snapshot" link whose tooltip bears the format name.
2553                 # i.e. "_snapshot_"
2554                 my ($fmt) = @snapshot_fmts;
2555                 return
2556                         $cgi->a({
2557                                 -href => href(
2558                                         action=>"snapshot",
2559                                         hash=>$hash,
2560                                         snapshot_format=>$fmt
2561                                 ),
2562                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2563                         }, "snapshot");
2564         } else { # $num_fmts == 0
2565                 return undef;
2566         }
2567 }
2568
2569 ## ......................................................................
2570 ## functions returning values to be passed, perhaps after some
2571 ## transformation, to other functions; e.g. returning arguments to href()
2572
2573 # returns hash to be passed to href to generate gitweb URL
2574 # in -title key it returns description of link
2575 sub get_feed_info {
2576         my $format = shift || 'Atom';
2577         my %res = (action => lc($format));
2578         my $matched_ref = 0;
2579
2580         # feed links are possible only for project views
2581         return unless (defined $project);
2582         # some views should link to OPML, or to generic project feed,
2583         # or don't have specific feed yet (so they should use generic)
2584         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2585
2586         my $branch = undef;
2587         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2588         # (fullname) to differentiate from tag links; this also makes
2589         # possible to detect branch links
2590         for my $ref (get_branch_refs()) {
2591                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2592                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2593                         $branch = $1;
2594                         $matched_ref = $ref;
2595                         last;
2596                 }
2597         }
2598         # find log type for feed description (title)
2599         my $type = 'log';
2600         if (defined $file_name) {
2601                 $type  = "history of $file_name";
2602                 $type .= "/" if ($action eq 'tree');
2603                 $type .= " on '$branch'" if (defined $branch);
2604         } else {
2605                 $type = "log of $branch" if (defined $branch);
2606         }
2607
2608         $res{-title} = $type;
2609         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2610         $res{'file_name'} = $file_name;
2611
2612         return %res;
2613 }
2614
2615 ## ----------------------------------------------------------------------
2616 ## git utility subroutines, invoking git commands
2617
2618 # returns path to the core git executable and the --git-dir parameter as list
2619 sub git_cmd {
2620         $number_of_git_cmds++;
2621         return $GIT, '--git-dir='.$git_dir;
2622 }
2623
2624 # quote the given arguments for passing them to the shell
2625 # quote_command("command", "arg 1", "arg with ' and ! characters")
2626 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2627 # Try to avoid using this function wherever possible.
2628 sub quote_command {
2629         return join(' ',
2630                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2631 }
2632
2633 # get HEAD ref of given project as hash
2634 sub git_get_head_hash {
2635         return git_get_full_hash(shift, 'HEAD');
2636 }
2637
2638 sub git_get_full_hash {
2639         return git_get_hash(@_);
2640 }
2641
2642 sub git_get_short_hash {
2643         return git_get_hash(@_, '--short=7');
2644 }
2645
2646 sub git_get_hash {
2647         my ($project, $hash, @options) = @_;
2648         my $o_git_dir = $git_dir;
2649         my $retval = undef;
2650         $git_dir = "$projectroot/$project";
2651         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2652             '--verify', '-q', @options, $hash) {
2653                 $retval = <$fd>;
2654                 chomp $retval if defined $retval;
2655                 close $fd;
2656         }
2657         if (defined $o_git_dir) {
2658                 $git_dir = $o_git_dir;
2659         }
2660         return $retval;
2661 }
2662
2663 # get type of given object
2664 sub git_get_type {
2665         my $hash = shift;
2666
2667         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2668         my $type = <$fd>;
2669         close $fd or return;
2670         chomp $type;
2671         return $type;
2672 }
2673
2674 # repository configuration
2675 our $config_file = '';
2676 our %config;
2677
2678 # store multiple values for single key as anonymous array reference
2679 # single values stored directly in the hash, not as [ <value> ]
2680 sub hash_set_multi {
2681         my ($hash, $key, $value) = @_;
2682
2683         if (!exists $hash->{$key}) {
2684                 $hash->{$key} = $value;
2685         } elsif (!ref $hash->{$key}) {
2686                 $hash->{$key} = [ $hash->{$key}, $value ];
2687         } else {
2688                 push @{$hash->{$key}}, $value;
2689         }
2690 }
2691
2692 # return hash of git project configuration
2693 # optionally limited to some section, e.g. 'gitweb'
2694 sub git_parse_project_config {
2695         my $section_regexp = shift;
2696         my %config;
2697
2698         local $/ = "\0";
2699
2700         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2701                 or return;
2702
2703         while (my $keyval = <$fh>) {
2704                 chomp $keyval;
2705                 my ($key, $value) = split(/\n/, $keyval, 2);
2706
2707                 hash_set_multi(\%config, $key, $value)
2708                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2709         }
2710         close $fh;
2711
2712         return %config;
2713 }
2714
2715 # convert config value to boolean: 'true' or 'false'
2716 # no value, number > 0, 'true' and 'yes' values are true
2717 # rest of values are treated as false (never as error)
2718 sub config_to_bool {
2719         my $val = shift;
2720
2721         return 1 if !defined $val;             # section.key
2722
2723         # strip leading and trailing whitespace
2724         $val =~ s/^\s+//;
2725         $val =~ s/\s+$//;
2726
2727         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2728                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2729 }
2730
2731 # convert config value to simple decimal number
2732 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2733 # to be multiplied by 1024, 1048576, or 1073741824
2734 sub config_to_int {
2735         my $val = shift;
2736
2737         # strip leading and trailing whitespace
2738         $val =~ s/^\s+//;
2739         $val =~ s/\s+$//;
2740
2741         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2742                 $unit = lc($unit);
2743                 # unknown unit is treated as 1
2744                 return $num * ($unit eq 'g' ? 1073741824 :
2745                                $unit eq 'm' ?    1048576 :
2746                                $unit eq 'k' ?       1024 : 1);
2747         }
2748         return $val;
2749 }
2750
2751 # convert config value to array reference, if needed
2752 sub config_to_multi {
2753         my $val = shift;
2754
2755         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2756 }
2757
2758 sub git_get_project_config {
2759         my ($key, $type) = @_;
2760
2761         return unless defined $git_dir;
2762
2763         # key sanity check
2764         return unless ($key);
2765         # only subsection, if exists, is case sensitive,
2766         # and not lowercased by 'git config -z -l'
2767         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2768                 $lo =~ s/_//g;
2769                 $key = join(".", lc($hi), $mi, lc($lo));
2770                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2771         } else {
2772                 $key = lc($key);
2773                 $key =~ s/_//g;
2774                 return if ($key =~ /\W/);
2775         }
2776         $key =~ s/^gitweb\.//;
2777
2778         # type sanity check
2779         if (defined $type) {
2780                 $type =~ s/^--//;
2781                 $type = undef
2782                         unless ($type eq 'bool' || $type eq 'int');
2783         }
2784
2785         # get config
2786         if (!defined $config_file ||
2787             $config_file ne "$git_dir/config") {
2788                 %config = git_parse_project_config('gitweb');
2789                 $config_file = "$git_dir/config";
2790         }
2791
2792         # check if config variable (key) exists
2793         return unless exists $config{"gitweb.$key"};
2794
2795         # ensure given type
2796         if (!defined $type) {
2797                 return $config{"gitweb.$key"};
2798         } elsif ($type eq 'bool') {
2799                 # backward compatibility: 'git config --bool' returns true/false
2800                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2801         } elsif ($type eq 'int') {
2802                 return config_to_int($config{"gitweb.$key"});
2803         }
2804         return $config{"gitweb.$key"};
2805 }
2806
2807 # get hash of given path at given ref
2808 sub git_get_hash_by_path {
2809         my $base = shift;
2810         my $path = shift || return undef;
2811         my $type = shift;
2812
2813         $path =~ s,/+$,,;
2814
2815         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2816                 or die_error(500, "Open git-ls-tree failed");
2817         my $line = <$fd>;
2818         close $fd or return undef;
2819
2820         if (!defined $line) {
2821                 # there is no tree or hash given by $path at $base
2822                 return undef;
2823         }
2824
2825         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2826         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2827         if (defined $type && $type ne $2) {
2828                 # type doesn't match
2829                 return undef;
2830         }
2831         return $3;
2832 }
2833
2834 # get path of entry with given hash at given tree-ish (ref)
2835 # used to get 'from' filename for combined diff (merge commit) for renames
2836 sub git_get_path_by_hash {
2837         my $base = shift || return;
2838         my $hash = shift || return;
2839
2840         local $/ = "\0";
2841
2842         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2843                 or return undef;
2844         while (my $line = <$fd>) {
2845                 chomp $line;
2846
2847                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2848                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2849                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2850                         close $fd;
2851                         return $1;
2852                 }
2853         }
2854         close $fd;
2855         return undef;
2856 }
2857
2858 ## ......................................................................
2859 ## git utility functions, directly accessing git repository
2860
2861 # get the value of config variable either from file named as the variable
2862 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2863 # configuration variable in the repository config file.
2864 sub git_get_file_or_project_config {
2865         my ($path, $name) = @_;
2866
2867         $git_dir = "$projectroot/$path";
2868         open my $fd, '<', "$git_dir/$name"
2869                 or return git_get_project_config($name);
2870         my $conf = <$fd>;
2871         close $fd;
2872         if (defined $conf) {
2873                 chomp $conf;
2874         }
2875         return $conf;
2876 }
2877
2878 sub git_get_project_description {
2879         my $path = shift;
2880         return git_get_file_or_project_config($path, 'description');
2881 }
2882
2883 sub git_get_project_category {
2884         my $path = shift;
2885         return git_get_file_or_project_config($path, 'category');
2886 }
2887
2888
2889 # supported formats:
2890 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2891 #   - if its contents is a number, use it as tag weight,
2892 #   - otherwise add a tag with weight 1
2893 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2894 #   the same value multiple times increases tag weight
2895 # * `gitweb.ctag' multi-valued repo config variable
2896 sub git_get_project_ctags {
2897         my $project = shift;
2898         my $ctags = {};
2899
2900         $git_dir = "$projectroot/$project";
2901         if (opendir my $dh, "$git_dir/ctags") {
2902                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2903                 foreach my $tagfile (@files) {
2904                         open my $ct, '<', $tagfile
2905                                 or next;
2906                         my $val = <$ct>;
2907                         chomp $val if $val;
2908                         close $ct;
2909
2910                         (my $ctag = $tagfile) =~ s#.*/##;
2911                         if ($val =~ /^\d+$/) {
2912                                 $ctags->{$ctag} = $val;
2913                         } else {
2914                                 $ctags->{$ctag} = 1;
2915                         }
2916                 }
2917                 closedir $dh;
2918
2919         } elsif (open my $fh, '<', "$git_dir/ctags") {
2920                 while (my $line = <$fh>) {
2921                         chomp $line;
2922                         $ctags->{$line}++ if $line;
2923                 }
2924                 close $fh;
2925
2926         } else {
2927                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2928                 foreach my $tag (@$taglist) {
2929                         $ctags->{$tag}++;
2930                 }
2931         }
2932
2933         return $ctags;
2934 }
2935
2936 # return hash, where keys are content tags ('ctags'),
2937 # and values are sum of weights of given tag in every project
2938 sub git_gather_all_ctags {
2939         my $projects = shift;
2940         my $ctags = {};
2941
2942         foreach my $p (@$projects) {
2943                 foreach my $ct (keys %{$p->{'ctags'}}) {
2944                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2945                 }
2946         }
2947
2948         return $ctags;
2949 }
2950
2951 sub git_populate_project_tagcloud {
2952         my $ctags = shift;
2953
2954         # First, merge different-cased tags; tags vote on casing
2955         my %ctags_lc;
2956         foreach (keys %$ctags) {
2957                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2958                 if (not $ctags_lc{lc $_}->{topcount}
2959                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2960                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2961                         $ctags_lc{lc $_}->{topname} = $_;
2962                 }
2963         }
2964
2965         my $cloud;
2966         my $matched = $input_params{'ctag'};
2967         if (eval { require HTML::TagCloud; 1; }) {
2968                 $cloud = HTML::TagCloud->new;
2969                 foreach my $ctag (sort keys %ctags_lc) {
2970                         # Pad the title with spaces so that the cloud looks
2971                         # less crammed.
2972                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2973                         $title =~ s/ /&nbsp;/g;
2974                         $title =~ s/^/&nbsp;/g;
2975                         $title =~ s/$/&nbsp;/g;
2976                         if (defined $matched && $matched eq $ctag) {
2977                                 $title = qq(<span class="match">$title</span>);
2978                         }
2979                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2980                                     $ctags_lc{$ctag}->{count});
2981                 }
2982         } else {
2983                 $cloud = {};
2984                 foreach my $ctag (keys %ctags_lc) {
2985                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2986                         if (defined $matched && $matched eq $ctag) {
2987                                 $title = qq(<span class="match">$title</span>);
2988                         }
2989                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2990                         $cloud->{$ctag}{ctag} =
2991                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2992                 }
2993         }
2994         return $cloud;
2995 }
2996
2997 sub git_show_project_tagcloud {
2998         my ($cloud, $count) = @_;
2999         if (ref $cloud eq 'HTML::TagCloud') {
3000                 return $cloud->html_and_css($count);
3001         } else {
3002                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3003                 return
3004                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3005                         join (', ', map {
3006                                 $cloud->{$_}->{'ctag'}
3007                         } splice(@tags, 0, $count)) .
3008                         '</div>';
3009         }
3010 }
3011
3012 sub git_get_project_url_list {
3013         my $path = shift;
3014
3015         $git_dir = "$projectroot/$path";
3016         open my $fd, '<', "$git_dir/cloneurl"
3017                 or return wantarray ?
3018                 @{ config_to_multi(git_get_project_config('url')) } :
3019                    config_to_multi(git_get_project_config('url'));
3020         my @git_project_url_list = map { chomp; $_ } <$fd>;
3021         close $fd;
3022
3023         return wantarray ? @git_project_url_list : \@git_project_url_list;
3024 }
3025
3026 sub git_get_projects_list {
3027         my $filter = shift || '';
3028         my $paranoid = shift;
3029         my @list;
3030
3031         if (-d $projects_list) {
3032                 # search in directory
3033                 my $dir = $projects_list;
3034                 # remove the trailing "/"
3035                 $dir =~ s!/+$!!;
3036                 my $pfxlen = length("$dir");
3037                 my $pfxdepth = ($dir =~ tr!/!!);
3038                 # when filtering, search only given subdirectory
3039                 if ($filter && !$paranoid) {
3040                         $dir .= "/$filter";
3041                         $dir =~ s!/+$!!;
3042                 }
3043
3044                 File::Find::find({
3045                         follow_fast => 1, # follow symbolic links
3046                         follow_skip => 2, # ignore duplicates
3047                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3048                         wanted => sub {
3049                                 # global variables
3050                                 our $project_maxdepth;
3051                                 our $projectroot;
3052                                 # skip project-list toplevel, if we get it.
3053                                 return if (m!^[/.]$!);
3054                                 # only directories can be git repositories
3055                                 return unless (-d $_);
3056                                 # don't traverse too deep (Find is super slow on os x)
3057                                 # $project_maxdepth excludes depth of $projectroot
3058                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3059                                         $File::Find::prune = 1;
3060                                         return;
3061                                 }
3062
3063                                 my $path = substr($File::Find::name, $pfxlen + 1);
3064                                 # paranoidly only filter here
3065                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3066                                         next;
3067                                 }
3068                                 # we check related file in $projectroot
3069                                 if (check_export_ok("$projectroot/$path")) {
3070                                         push @list, { path => $path };
3071                                         $File::Find::prune = 1;
3072                                 }
3073                         },
3074                 }, "$dir");
3075
3076         } elsif (-f $projects_list) {
3077                 # read from file(url-encoded):
3078                 # 'git%2Fgit.git Linus+Torvalds'
3079                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3080                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3081                 open my $fd, '<', $projects_list or return;
3082         PROJECT:
3083                 while (my $line = <$fd>) {
3084                         chomp $line;
3085                         my ($path, $owner) = split ' ', $line;
3086                         $path = unescape($path);
3087                         $owner = unescape($owner);
3088                         if (!defined $path) {
3089                                 next;
3090                         }
3091                         # if $filter is rpovided, check if $path begins with $filter
3092                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3093                                 next;
3094                         }
3095                         if (check_export_ok("$projectroot/$path")) {
3096                                 my $pr = {
3097                                         path => $path
3098                                 };
3099                                 if ($owner) {
3100                                         $pr->{'owner'} = to_utf8($owner);
3101                                 }
3102                                 push @list, $pr;
3103                         }
3104                 }
3105                 close $fd;
3106         }
3107         return @list;
3108 }
3109
3110 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3111 # as side effects it sets 'forks' field to list of forks for forked projects
3112 sub filter_forks_from_projects_list {
3113         my $projects = shift;
3114
3115         my %trie; # prefix tree of directories (path components)
3116         # generate trie out of those directories that might contain forks
3117         foreach my $pr (@$projects) {
3118                 my $path = $pr->{'path'};
3119                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3120                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3121                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3122                 next unless (-d "$projectroot/$path"); # containing directory exists
3123                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3124
3125                 # add to trie
3126                 my @dirs = split('/', $path);
3127                 # walk the trie, until either runs out of components or out of trie
3128                 my $ref = \%trie;
3129                 while (scalar @dirs &&
3130                        exists($ref->{$dirs[0]})) {
3131                         $ref = $ref->{shift @dirs};
3132                 }
3133                 # create rest of trie structure from rest of components
3134                 foreach my $dir (@dirs) {
3135                         $ref = $ref->{$dir} = {};
3136                 }
3137                 # create end marker, store $pr as a data
3138                 $ref->{''} = $pr if (!exists $ref->{''});
3139         }
3140
3141         # filter out forks, by finding shortest prefix match for paths
3142         my @filtered;
3143  PROJECT:
3144         foreach my $pr (@$projects) {
3145                 # trie lookup
3146                 my $ref = \%trie;
3147         DIR:
3148                 foreach my $dir (split('/', $pr->{'path'})) {
3149                         if (exists $ref->{''}) {
3150                                 # found [shortest] prefix, is a fork - skip it
3151                                 push @{$ref->{''}{'forks'}}, $pr;
3152                                 next PROJECT;
3153                         }
3154                         if (!exists $ref->{$dir}) {
3155                                 # not in trie, cannot have prefix, not a fork
3156                                 push @filtered, $pr;
3157                                 next PROJECT;
3158                         }
3159                         # If the dir is there, we just walk one step down the trie.
3160                         $ref = $ref->{$dir};
3161                 }
3162                 # we ran out of trie
3163                 # (shouldn't happen: it's either no match, or end marker)
3164                 push @filtered, $pr;
3165         }
3166
3167         return @filtered;
3168 }
3169
3170 # note: fill_project_list_info must be run first,
3171 # for 'descr_long' and 'ctags' to be filled
3172 sub search_projects_list {
3173         my ($projlist, %opts) = @_;
3174         my $tagfilter  = $opts{'tagfilter'};
3175         my $search_re = $opts{'search_regexp'};
3176
3177         return @$projlist
3178                 unless ($tagfilter || $search_re);
3179
3180         # searching projects require filling to be run before it;
3181         fill_project_list_info($projlist,
3182                                $tagfilter  ? 'ctags' : (),
3183                                $search_re ? ('path', 'descr') : ());
3184         my @projects;
3185  PROJECT:
3186         foreach my $pr (@$projlist) {
3187
3188                 if ($tagfilter) {
3189                         next unless ref($pr->{'ctags'}) eq 'HASH';
3190                         next unless
3191                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3192                 }
3193
3194                 if ($search_re) {
3195                         next unless
3196                                 $pr->{'path'} =~ /$search_re/ ||
3197                                 $pr->{'descr_long'} =~ /$search_re/;
3198                 }
3199
3200                 push @projects, $pr;
3201         }
3202
3203         return @projects;
3204 }
3205
3206 our $gitweb_project_owner = undef;
3207 sub git_get_project_list_from_file {
3208
3209         return if (defined $gitweb_project_owner);
3210
3211         $gitweb_project_owner = {};
3212         # read from file (url-encoded):
3213         # 'git%2Fgit.git Linus+Torvalds'
3214         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3215         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3216         if (-f $projects_list) {
3217                 open(my $fd, '<', $projects_list);
3218                 while (my $line = <$fd>) {
3219                         chomp $line;
3220                         my ($pr, $ow) = split ' ', $line;
3221                         $pr = unescape($pr);
3222                         $ow = unescape($ow);
3223                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3224                 }
3225                 close $fd;
3226         }
3227 }
3228
3229 sub git_get_project_owner {
3230         my $project = shift;
3231         my $owner;
3232
3233         return undef unless $project;
3234         $git_dir = "$projectroot/$project";
3235
3236         if (!defined $gitweb_project_owner) {
3237                 git_get_project_list_from_file();
3238         }
3239
3240         if (exists $gitweb_project_owner->{$project}) {
3241                 $owner = $gitweb_project_owner->{$project};
3242         }
3243         if (!defined $owner){
3244                 $owner = git_get_project_config('owner');
3245         }
3246         if (!defined $owner) {
3247                 $owner = get_file_owner("$git_dir");
3248         }
3249
3250         return $owner;
3251 }
3252
3253 sub git_get_last_activity {
3254         my ($path) = @_;
3255         my $fd;
3256
3257         $git_dir = "$projectroot/$path";
3258         open($fd, "-|", git_cmd(), 'for-each-ref',
3259              '--format=%(committer)',
3260              '--sort=-committerdate',
3261              '--count=1',
3262              map { "refs/$_" } get_branch_refs ()) or return;
3263         my $most_recent = <$fd>;
3264         close $fd or return;
3265         if (defined $most_recent &&
3266             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3267                 my $timestamp = $1;
3268                 my $age = time - $timestamp;
3269                 return ($age, age_string($age));
3270         }
3271         return (undef, undef);
3272 }
3273
3274 # Implementation note: when a single remote is wanted, we cannot use 'git
3275 # remote show -n' because that command always work (assuming it's a remote URL
3276 # if it's not defined), and we cannot use 'git remote show' because that would
3277 # try to make a network roundtrip. So the only way to find if that particular
3278 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3279 # and when we find what we want.
3280 sub git_get_remotes_list {
3281         my $wanted = shift;
3282         my %remotes = ();
3283
3284         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3285         return unless $fd;
3286         while (my $remote = <$fd>) {
3287                 chomp $remote;
3288                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3289                 next if $wanted and not $remote eq $wanted;
3290                 my ($url, $key) = ($1, $2);
3291
3292                 $remotes{$remote} ||= { 'heads' => () };
3293                 $remotes{$remote}{$key} = $url;
3294         }
3295         close $fd or return;
3296         return wantarray ? %remotes : \%remotes;
3297 }
3298
3299 # Takes a hash of remotes as first parameter and fills it by adding the
3300 # available remote heads for each of the indicated remotes.
3301 sub fill_remote_heads {
3302         my $remotes = shift;
3303         my @heads = map { "remotes/$_" } keys %$remotes;
3304         my @remoteheads = git_get_heads_list(undef, @heads);
3305         foreach my $remote (keys %$remotes) {
3306                 $remotes->{$remote}{'heads'} = [ grep {
3307                         $_->{'name'} =~ s!^$remote/!!
3308                         } @remoteheads ];
3309         }
3310 }
3311
3312 sub git_get_references {
3313         my $type = shift || "";
3314         my %refs;
3315         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3316         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3317         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3318                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3319                 or return;
3320
3321         while (my $line = <$fd>) {
3322                 chomp $line;
3323                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3324                         if (defined $refs{$1}) {
3325                                 push @{$refs{$1}}, $2;
3326                         } else {
3327                                 $refs{$1} = [ $2 ];
3328                         }
3329                 }
3330         }
3331         close $fd or return;
3332         return \%refs;
3333 }
3334
3335 sub git_get_rev_name_tags {
3336         my $hash = shift || return undef;
3337
3338         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3339                 or return;
3340         my $name_rev = <$fd>;
3341         close $fd;
3342
3343         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3344                 return $1;
3345         } else {
3346                 # catches also '$hash undefined' output
3347                 return undef;
3348         }
3349 }
3350
3351 ## ----------------------------------------------------------------------
3352 ## parse to hash functions
3353
3354 sub parse_date {
3355         my $epoch = shift;
3356         my $tz = shift || "-0000";
3357
3358         my %date;
3359         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3360         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3361         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3362         $date{'hour'} = $hour;
3363         $date{'minute'} = $min;
3364         $date{'mday'} = $mday;
3365         $date{'day'} = $days[$wday];
3366         $date{'month'} = $months[$mon];
3367         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3368                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3369         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3370                              $mday, $months[$mon], $hour ,$min;
3371         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3372                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3373
3374         my ($tz_sign, $tz_hour, $tz_min) =
3375                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3376         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3377         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3378         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3379         $date{'hour_local'} = $hour;
3380         $date{'minute_local'} = $min;
3381         $date{'tz_local'} = $tz;
3382         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3383                                   1900+$year, $mon+1, $mday,
3384                                   $hour, $min, $sec, $tz);
3385         return %date;
3386 }
3387
3388 sub parse_tag {
3389         my $tag_id = shift;
3390         my %tag;
3391         my @comment;
3392
3393         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3394         $tag{'id'} = $tag_id;
3395         while (my $line = <$fd>) {
3396                 chomp $line;
3397                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3398                         $tag{'object'} = $1;
3399                 } elsif ($line =~ m/^type (.+)$/) {
3400                         $tag{'type'} = $1;
3401                 } elsif ($line =~ m/^tag (.+)$/) {
3402                         $tag{'name'} = $1;
3403                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3404                         $tag{'author'} = $1;
3405                         $tag{'author_epoch'} = $2;
3406                         $tag{'author_tz'} = $3;
3407                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3408                                 $tag{'author_name'}  = $1;
3409                                 $tag{'author_email'} = $2;
3410                         } else {
3411                                 $tag{'author_name'} = $tag{'author'};
3412                         }
3413                 } elsif ($line =~ m/--BEGIN/) {
3414                         push @comment, $line;
3415                         last;
3416                 } elsif ($line eq "") {
3417                         last;
3418                 }
3419         }
3420         push @comment, <$fd>;
3421         $tag{'comment'} = \@comment;
3422         close $fd or return;
3423         if (!defined $tag{'name'}) {
3424                 return
3425         };
3426         return %tag
3427 }
3428
3429 sub parse_commit_text {
3430         my ($commit_text, $withparents) = @_;
3431         my @commit_lines = split '\n', $commit_text;
3432         my %co;
3433
3434         pop @commit_lines; # Remove '\0'
3435
3436         if (! @commit_lines) {
3437                 return;
3438         }
3439
3440         my $header = shift @commit_lines;
3441         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3442                 return;
3443         }
3444         ($co{'id'}, my @parents) = split ' ', $header;
3445         while (my $line = shift @commit_lines) {
3446                 last if $line eq "\n";
3447                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3448                         $co{'tree'} = $1;
3449                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3450                         push @parents, $1;
3451                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3452                         $co{'author'} = to_utf8($1);
3453                         $co{'author_epoch'} = $2;
3454                         $co{'author_tz'} = $3;
3455                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3456                                 $co{'author_name'}  = $1;
3457                                 $co{'author_email'} = $2;
3458                         } else {
3459                                 $co{'author_name'} = $co{'author'};
3460                         }
3461                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3462                         $co{'committer'} = to_utf8($1);
3463                         $co{'committer_epoch'} = $2;
3464                         $co{'committer_tz'} = $3;
3465                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3466                                 $co{'committer_name'}  = $1;
3467                                 $co{'committer_email'} = $2;
3468                         } else {
3469                                 $co{'committer_name'} = $co{'committer'};
3470                         }
3471                 }
3472         }
3473         if (!defined $co{'tree'}) {
3474                 return;
3475         };
3476         $co{'parents'} = \@parents;
3477         $co{'parent'} = $parents[0];
3478
3479         foreach my $title (@commit_lines) {
3480                 $title =~ s/^    //;
3481                 if ($title ne "") {
3482                         $co{'title'} = chop_str($title, 80, 5);
3483                         # remove leading stuff of merges to make the interesting part visible
3484                         if (length($title) > 50) {
3485                                 $title =~ s/^Automatic //;
3486                                 $title =~ s/^merge (of|with) /Merge ... /i;
3487                                 if (length($title) > 50) {
3488                                         $title =~ s/(http|rsync):\/\///;
3489                                 }
3490                                 if (length($title) > 50) {
3491                                         $title =~ s/(master|www|rsync)\.//;
3492                                 }
3493                                 if (length($title) > 50) {
3494                                         $title =~ s/kernel.org:?//;
3495                                 }
3496                                 if (length($title) > 50) {
3497                                         $title =~ s/\/pub\/scm//;
3498                                 }
3499                         }
3500                         $co{'title_short'} = chop_str($title, 50, 5);
3501                         last;
3502                 }
3503         }
3504         if (! defined $co{'title'} || $co{'title'} eq "") {
3505                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3506         }
3507         # remove added spaces
3508         foreach my $line (@commit_lines) {
3509                 $line =~ s/^    //;
3510         }
3511         $co{'comment'} = \@commit_lines;
3512
3513         my $age = time - $co{'committer_epoch'};
3514         $co{'age'} = $age;
3515         $co{'age_string'} = age_string($age);
3516         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3517         if ($age > 60*60*24*7*2) {
3518                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3519                 $co{'age_string_age'} = $co{'age_string'};
3520         } else {
3521                 $co{'age_string_date'} = $co{'age_string'};
3522                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3523         }
3524         return %co;
3525 }
3526
3527 sub parse_commit {
3528         my ($commit_id) = @_;
3529         my %co;
3530
3531         local $/ = "\0";
3532
3533         open my $fd, "-|", git_cmd(), "rev-list",
3534                 "--parents",
3535                 "--header",
3536                 "--max-count=1",
3537                 $commit_id,
3538                 "--",
3539                 or die_error(500, "Open git-rev-list failed");
3540         %co = parse_commit_text(<$fd>, 1);
3541         close $fd;
3542
3543         return %co;
3544 }
3545
3546 sub parse_commits {
3547         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3548         my @cos;
3549
3550         $maxcount ||= 1;
3551         $skip ||= 0;
3552
3553         local $/ = "\0";
3554
3555         open my $fd, "-|", git_cmd(), "rev-list",
3556                 "--header",
3557                 @args,
3558                 ("--max-count=" . $maxcount),
3559                 ("--skip=" . $skip),
3560                 @extra_options,
3561                 $commit_id,
3562                 "--",
3563                 ($filename ? ($filename) : ())
3564                 or die_error(500, "Open git-rev-list failed");
3565         while (my $line = <$fd>) {
3566                 my %co = parse_commit_text($line);
3567                 push @cos, \%co;
3568         }
3569         close $fd;
3570
3571         return wantarray ? @cos : \@cos;
3572 }
3573
3574 # parse line of git-diff-tree "raw" output
3575 sub parse_difftree_raw_line {
3576         my $line = shift;
3577         my %res;
3578
3579         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3580         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3581         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3582                 $res{'from_mode'} = $1;
3583                 $res{'to_mode'} = $2;
3584                 $res{'from_id'} = $3;
3585                 $res{'to_id'} = $4;
3586                 $res{'status'} = $5;
3587                 $res{'similarity'} = $6;
3588                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3589                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3590                 } else {
3591                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3592                 }
3593         }
3594         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3595         # combined diff (for merge commit)
3596         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3597                 $res{'nparents'}  = length($1);
3598                 $res{'from_mode'} = [ split(' ', $2) ];
3599                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3600                 $res{'from_id'} = [ split(' ', $3) ];
3601                 $res{'to_id'} = pop @{$res{'from_id'}};
3602                 $res{'status'} = [ split('', $4) ];
3603                 $res{'to_file'} = unquote($5);
3604         }
3605         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3606         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3607                 $res{'commit'} = $1;
3608         }
3609
3610         return wantarray ? %res : \%res;
3611 }
3612
3613 # wrapper: return parsed line of git-diff-tree "raw" output
3614 # (the argument might be raw line, or parsed info)
3615 sub parsed_difftree_line {
3616         my $line_or_ref = shift;
3617
3618         if (ref($line_or_ref) eq "HASH") {
3619                 # pre-parsed (or generated by hand)
3620                 return $line_or_ref;
3621         } else {
3622                 return parse_difftree_raw_line($line_or_ref);
3623         }
3624 }
3625
3626 # parse line of git-ls-tree output
3627 sub parse_ls_tree_line {
3628         my $line = shift;
3629         my %opts = @_;
3630         my %res;
3631
3632         if ($opts{'-l'}) {
3633                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3634                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3635
3636                 $res{'mode'} = $1;
3637                 $res{'type'} = $2;
3638                 $res{'hash'} = $3;
3639                 $res{'size'} = $4;
3640                 if ($opts{'-z'}) {
3641                         $res{'name'} = $5;
3642                 } else {
3643                         $res{'name'} = unquote($5);
3644                 }
3645         } else {
3646                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3647                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3648
3649                 $res{'mode'} = $1;
3650                 $res{'type'} = $2;
3651                 $res{'hash'} = $3;
3652                 if ($opts{'-z'}) {
3653                         $res{'name'} = $4;
3654                 } else {
3655                         $res{'name'} = unquote($4);
3656                 }
3657         }
3658
3659         return wantarray ? %res : \%res;
3660 }
3661
3662 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3663 sub parse_from_to_diffinfo {
3664         my ($diffinfo, $from, $to, @parents) = @_;
3665
3666         if ($diffinfo->{'nparents'}) {
3667                 # combined diff
3668                 $from->{'file'} = [];
3669                 $from->{'href'} = [];
3670                 fill_from_file_info($diffinfo, @parents)
3671                         unless exists $diffinfo->{'from_file'};
3672                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3673                         $from->{'file'}[$i] =
3674                                 defined $diffinfo->{'from_file'}[$i] ?
3675                                         $diffinfo->{'from_file'}[$i] :
3676                                         $diffinfo->{'to_file'};
3677                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3678                                 $from->{'href'}[$i] = href(action=>"blob",
3679                                                            hash_base=>$parents[$i],
3680                                                            hash=>$diffinfo->{'from_id'}[$i],
3681                                                            file_name=>$from->{'file'}[$i]);
3682                         } else {
3683                                 $from->{'href'}[$i] = undef;
3684                         }
3685                 }
3686         } else {
3687                 # ordinary (not combined) diff
3688                 $from->{'file'} = $diffinfo->{'from_file'};
3689                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3690                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3691                                                hash=>$diffinfo->{'from_id'},
3692                                                file_name=>$from->{'file'});
3693                 } else {
3694                         delete $from->{'href'};
3695                 }
3696         }
3697
3698         $to->{'file'} = $diffinfo->{'to_file'};
3699         if (!is_deleted($diffinfo)) { # file exists in result
3700                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3701                                      hash=>$diffinfo->{'to_id'},
3702                                      file_name=>$to->{'file'});
3703         } else {
3704                 delete $to->{'href'};
3705         }
3706 }
3707
3708 ## ......................................................................
3709 ## parse to array of hashes functions
3710
3711 sub git_get_heads_list {
3712         my ($limit, @classes) = @_;
3713         @classes = get_branch_refs() unless @classes;
3714         my @patterns = map { "refs/$_" } @classes;
3715         my @headslist;
3716
3717         open my $fd, '-|', git_cmd(), 'for-each-ref',
3718                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3719                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3720                 @patterns
3721                 or return;
3722         while (my $line = <$fd>) {
3723                 my %ref_item;
3724
3725                 chomp $line;
3726                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3727                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3728                 my ($committer, $epoch, $tz) =
3729                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3730                 $ref_item{'fullname'}  = $name;
3731                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3732                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3733                 $ref_item{'name'} = $name;
3734                 # for refs neither in 'heads' nor 'remotes' we want to
3735                 # show their ref dir
3736                 my $ref_dir = (defined $1) ? $1 : '';
3737                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3738                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3739                 }
3740
3741                 $ref_item{'id'}    = $hash;
3742                 $ref_item{'title'} = $title || '(no commit message)';
3743                 $ref_item{'epoch'} = $epoch;
3744                 if ($epoch) {
3745                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3746                 } else {
3747                         $ref_item{'age'} = "unknown";
3748                 }
3749
3750                 push @headslist, \%ref_item;
3751         }
3752         close $fd;
3753
3754         return wantarray ? @headslist : \@headslist;
3755 }
3756
3757 sub git_get_tags_list {
3758         my $limit = shift;
3759         my @tagslist;
3760
3761         open my $fd, '-|', git_cmd(), 'for-each-ref',
3762                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3763                 '--format=%(objectname) %(objecttype) %(refname) '.
3764                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3765                 'refs/tags'
3766                 or return;
3767         while (my $line = <$fd>) {
3768                 my %ref_item;
3769
3770                 chomp $line;
3771                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3772                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3773                 my ($creator, $epoch, $tz) =
3774                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3775                 $ref_item{'fullname'} = $name;
3776                 $name =~ s!^refs/tags/!!;
3777
3778                 $ref_item{'type'} = $type;
3779                 $ref_item{'id'} = $id;
3780                 $ref_item{'name'} = $name;
3781                 if ($type eq "tag") {
3782                         $ref_item{'subject'} = $title;
3783                         $ref_item{'reftype'} = $reftype;
3784                         $ref_item{'refid'}   = $refid;
3785                 } else {
3786                         $ref_item{'reftype'} = $type;
3787                         $ref_item{'refid'}   = $id;
3788                 }
3789
3790                 if ($type eq "tag" || $type eq "commit") {
3791                         $ref_item{'epoch'} = $epoch;
3792                         if ($epoch) {
3793                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3794                         } else {
3795                                 $ref_item{'age'} = "unknown";
3796                         }
3797                 }
3798
3799                 push @tagslist, \%ref_item;
3800         }
3801         close $fd;
3802
3803         return wantarray ? @tagslist : \@tagslist;
3804 }
3805
3806 ## ----------------------------------------------------------------------
3807 ## filesystem-related functions
3808
3809 sub get_file_owner {
3810         my $path = shift;
3811
3812         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3813         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3814         if (!defined $gcos) {
3815                 return undef;
3816         }
3817         my $owner = $gcos;
3818         $owner =~ s/[,;].*$//;
3819         return to_utf8($owner);
3820 }
3821
3822 # assume that file exists
3823 sub insert_file {
3824         my $filename = shift;
3825
3826         open my $fd, '<', $filename;
3827         print map { to_utf8($_) } <$fd>;
3828         close $fd;
3829 }
3830
3831 ## ......................................................................
3832 ## mimetype related functions
3833
3834 sub mimetype_guess_file {
3835         my $filename = shift;
3836         my $mimemap = shift;
3837         -r $mimemap or return undef;
3838
3839         my %mimemap;
3840         open(my $mh, '<', $mimemap) or return undef;
3841         while (<$mh>) {
3842                 next if m/^#/; # skip comments
3843                 my ($mimetype, @exts) = split(/\s+/);
3844                 foreach my $ext (@exts) {
3845                         $mimemap{$ext} = $mimetype;
3846                 }
3847         }
3848         close($mh);
3849
3850         $filename =~ /\.([^.]*)$/;
3851         return $mimemap{$1};
3852 }
3853
3854 sub mimetype_guess {
3855         my $filename = shift;
3856         my $mime;
3857         $filename =~ /\./ or return undef;
3858
3859         if ($mimetypes_file) {
3860                 my $file = $mimetypes_file;
3861                 if ($file !~ m!^/!) { # if it is relative path
3862                         # it is relative to project
3863                         $file = "$projectroot/$project/$file";
3864                 }
3865                 $mime = mimetype_guess_file($filename, $file);
3866         }
3867         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3868         return $mime;
3869 }
3870
3871 sub blob_mimetype {
3872         my $fd = shift;
3873         my $filename = shift;
3874
3875         if ($filename) {
3876                 my $mime = mimetype_guess($filename);
3877                 $mime and return $mime;
3878         }
3879
3880         # just in case
3881         return $default_blob_plain_mimetype unless $fd;
3882
3883         if (-T $fd) {
3884                 return 'text/plain';
3885         } elsif (! $filename) {
3886                 return 'application/octet-stream';
3887         } elsif ($filename =~ m/\.png$/i) {
3888                 return 'image/png';
3889         } elsif ($filename =~ m/\.gif$/i) {
3890                 return 'image/gif';
3891         } elsif ($filename =~ m/\.jpe?g$/i) {
3892                 return 'image/jpeg';
3893         } else {
3894                 return 'application/octet-stream';
3895         }
3896 }
3897
3898 sub blob_contenttype {
3899         my ($fd, $file_name, $type) = @_;
3900
3901         $type ||= blob_mimetype($fd, $file_name);
3902         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3903                 $type .= "; charset=$default_text_plain_charset";
3904         }
3905
3906         return $type;
3907 }
3908
3909 # guess file syntax for syntax highlighting; return undef if no highlighting
3910 # the name of syntax can (in the future) depend on syntax highlighter used
3911 sub guess_file_syntax {
3912         my ($highlight, $mimetype, $file_name) = @_;
3913         return undef unless ($highlight && defined $file_name);
3914         my $basename = basename($file_name, '.in');
3915         return $highlight_basename{$basename}
3916                 if exists $highlight_basename{$basename};
3917
3918         $basename =~ /\.([^.]*)$/;
3919         my $ext = $1 or return undef;
3920         return $highlight_ext{$ext}
3921                 if exists $highlight_ext{$ext};
3922
3923         return undef;
3924 }
3925
3926 # run highlighter and return FD of its output,
3927 # or return original FD if no highlighting
3928 sub run_highlighter {
3929         my ($fd, $highlight, $syntax) = @_;
3930         return $fd unless ($highlight && defined $syntax);
3931
3932         close $fd;
3933         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3934                   quote_command($highlight_bin).
3935                   " --replace-tabs=8 --fragment --syntax $syntax |"
3936                 or die_error(500, "Couldn't open file or run syntax highlighter");
3937         return $fd;
3938 }
3939
3940 ## ======================================================================
3941 ## functions printing HTML: header, footer, error page
3942
3943 sub get_page_title {
3944         my $title = to_utf8($site_name);
3945
3946         unless (defined $project) {
3947                 if (defined $project_filter) {
3948                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3949                 }
3950                 return $title;
3951         }
3952         $title .= " - " . to_utf8($project);
3953
3954         return $title unless (defined $action);
3955         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3956
3957         return $title unless (defined $file_name);
3958         $title .= " - " . esc_path($file_name);
3959         if ($action eq "tree" && $file_name !~ m|/$|) {
3960                 $title .= "/";
3961         }
3962
3963         return $title;
3964 }
3965
3966 sub get_content_type_html {
3967         # require explicit support from the UA if we are to send the page as
3968         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3969         # we have to do this because MSIE sometimes globs '*/*', pretending to
3970         # support xhtml+xml but choking when it gets what it asked for.
3971         if (defined $cgi->http('HTTP_ACCEPT') &&
3972             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3973             $cgi->Accept('application/xhtml+xml') != 0) {
3974                 return 'application/xhtml+xml';
3975         } else {
3976                 return 'text/html';
3977         }
3978 }
3979
3980 sub print_feed_meta {
3981         if (defined $project) {
3982                 my %href_params = get_feed_info();
3983                 if (!exists $href_params{'-title'}) {
3984                         $href_params{'-title'} = 'log';
3985                 }
3986
3987                 foreach my $format (qw(RSS Atom)) {
3988                         my $type = lc($format);
3989                         my %link_attr = (
3990                                 '-rel' => 'alternate',
3991                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3992                                 '-type' => "application/$type+xml"
3993                         );
3994
3995                         $href_params{'extra_options'} = undef;
3996                         $href_params{'action'} = $type;
3997                         $link_attr{'-href'} = href(%href_params);
3998                         print "<link ".
3999                               "rel=\"$link_attr{'-rel'}\" ".
4000                               "title=\"$link_attr{'-title'}\" ".
4001                               "href=\"$link_attr{'-href'}\" ".
4002                               "type=\"$link_attr{'-type'}\" ".
4003                               "/>\n";
4004
4005                         $href_params{'extra_options'} = '--no-merges';
4006                         $link_attr{'-href'} = href(%href_params);
4007                         $link_attr{'-title'} .= ' (no merges)';
4008                         print "<link ".
4009                               "rel=\"$link_attr{'-rel'}\" ".
4010                               "title=\"$link_attr{'-title'}\" ".
4011                               "href=\"$link_attr{'-href'}\" ".
4012                               "type=\"$link_attr{'-type'}\" ".
4013                               "/>\n";
4014                 }
4015
4016         } else {
4017                 printf('<link rel="alternate" title="%s projects list" '.
4018                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4019                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4020                 printf('<link rel="alternate" title="%s projects feeds" '.
4021                        'href="%s" type="text/x-opml" />'."\n",
4022                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4023         }
4024 }
4025
4026 sub print_header_links {
4027         my $status = shift;
4028
4029         # print out each stylesheet that exist, providing backwards capability
4030         # for those people who defined $stylesheet in a config file
4031         if (defined $stylesheet) {
4032                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4033         } else {
4034                 foreach my $stylesheet (@stylesheets) {
4035                         next unless $stylesheet;
4036                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4037                 }
4038         }
4039         print_feed_meta()
4040                 if ($status eq '200 OK');
4041         if (defined $favicon) {
4042                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4043         }
4044 }
4045
4046 sub print_nav_breadcrumbs_path {
4047         my $dirprefix = undef;
4048         while (my $part = shift) {
4049                 $dirprefix .= "/" if defined $dirprefix;
4050                 $dirprefix .= $part;
4051                 print $cgi->a({-href => href(project => undef,
4052                                              project_filter => $dirprefix,
4053                                              action => "project_list")},
4054                               esc_html($part)) . " / ";
4055         }
4056 }
4057
4058 sub print_nav_breadcrumbs {
4059         my %opts = @_;
4060
4061         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4062                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4063         }
4064         if (defined $project) {
4065                 my @dirname = split '/', $project;
4066                 my $projectbasename = pop @dirname;
4067                 print_nav_breadcrumbs_path(@dirname);
4068                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4069                 if (defined $action) {
4070                         my $action_print = $action ;
4071                         if (defined $opts{-action_extra}) {
4072                                 $action_print = $cgi->a({-href => href(action=>$action)},
4073                                         $action);
4074                         }
4075                         print " / $action_print";
4076                 }
4077                 if (defined $opts{-action_extra}) {
4078                         print " / $opts{-action_extra}";
4079                 }
4080                 print "\n";
4081         } elsif (defined $project_filter) {
4082                 print_nav_breadcrumbs_path(split '/', $project_filter);
4083         }
4084 }
4085
4086 sub print_search_form {
4087         if (!defined $searchtext) {
4088                 $searchtext = "";
4089         }
4090         my $search_hash;
4091         if (defined $hash_base) {
4092                 $search_hash = $hash_base;
4093         } elsif (defined $hash) {
4094                 $search_hash = $hash;
4095         } else {
4096                 $search_hash = "HEAD";
4097         }
4098         my $action = $my_uri;
4099         my $use_pathinfo = gitweb_check_feature('pathinfo');
4100         if ($use_pathinfo) {
4101                 $action .= "/".esc_url($project);
4102         }
4103         print $cgi->startform(-method => "get", -action => $action) .
4104               "<div class=\"search\">\n" .
4105               (!$use_pathinfo &&
4106               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4107               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4108               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4109               $cgi->popup_menu(-name => 'st', -default => 'commit',
4110                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4111               " " . $cgi->a({-href => href(action=>"search_help"),
4112                              -title => "search help" }, "?") . " search:\n",
4113               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4114               "<span title=\"Extended regular expression\">" .
4115               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4116                              -checked => $search_use_regexp) .
4117               "</span>" .
4118               "</div>" .
4119               $cgi->end_form() . "\n";
4120 }
4121
4122 sub git_header_html {
4123         my $status = shift || "200 OK";
4124         my $expires = shift;
4125         my %opts = @_;
4126
4127         my $title = get_page_title();
4128         my $content_type = get_content_type_html();
4129         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4130                            -status=> $status, -expires => $expires)
4131                 unless ($opts{'-no_http_header'});
4132         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4133         print <<EOF;
4134 <?xml version="1.0" encoding="utf-8"?>
4135 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4136 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4137 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4138 <!-- git core binaries version $git_version -->
4139 <head>
4140 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4141 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4142 <meta name="robots" content="index, nofollow"/>
4143 <title>$title</title>
4144 EOF
4145         # the stylesheet, favicon etc urls won't work correctly with path_info
4146         # unless we set the appropriate base URL
4147         if ($ENV{'PATH_INFO'}) {
4148                 print "<base href=\"".esc_url($base_url)."\" />\n";
4149         }
4150         print_header_links($status);
4151
4152         if (defined $site_html_head_string) {
4153                 print to_utf8($site_html_head_string);
4154         }
4155
4156         print "</head>\n" .
4157               "<body>\n";
4158
4159         if (defined $site_header && -f $site_header) {
4160                 insert_file($site_header);
4161         }
4162
4163         print "<div class=\"page_header\">\n";
4164         if (defined $logo) {
4165                 print $cgi->a({-href => esc_url($logo_url),
4166                                -title => $logo_label},
4167                               $cgi->img({-src => esc_url($logo),
4168                                          -width => 72, -height => 27,
4169                                          -alt => "git",
4170                                          -class => "logo"}));
4171         }
4172         print_nav_breadcrumbs(%opts);
4173         print "</div>\n";
4174
4175         my $have_search = gitweb_check_feature('search');
4176         if (defined $project && $have_search) {
4177                 print_search_form();
4178         }
4179 }
4180
4181 sub git_footer_html {
4182         my $feed_class = 'rss_logo';
4183
4184         print "<div class=\"page_footer\">\n";
4185         if (defined $project) {
4186                 my $descr = git_get_project_description($project);
4187                 if (defined $descr) {
4188                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4189                 }
4190
4191                 my %href_params = get_feed_info();
4192                 if (!%href_params) {
4193                         $feed_class .= ' generic';
4194                 }
4195                 $href_params{'-title'} ||= 'log';
4196
4197                 foreach my $format (qw(RSS Atom)) {
4198                         $href_params{'action'} = lc($format);
4199                         print $cgi->a({-href => href(%href_params),
4200                                       -title => "$href_params{'-title'} $format feed",
4201                                       -class => $feed_class}, $format)."\n";
4202                 }
4203
4204         } else {
4205                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4206                                              project_filter => $project_filter),
4207                               -class => $feed_class}, "OPML") . " ";
4208                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4209                                              project_filter => $project_filter),
4210                               -class => $feed_class}, "TXT") . "\n";
4211         }
4212         print "</div>\n"; # class="page_footer"
4213
4214         if (defined $t0 && gitweb_check_feature('timed')) {
4215                 print "<div id=\"generating_info\">\n";
4216                 print 'This page took '.
4217                       '<span id="generating_time" class="time_span">'.
4218                       tv_interval($t0, [ gettimeofday() ]).
4219                       ' seconds </span>'.
4220                       ' and '.
4221                       '<span id="generating_cmd">'.
4222                       $number_of_git_cmds.
4223                       '</span> git commands '.
4224                       " to generate.\n";
4225                 print "</div>\n"; # class="page_footer"
4226         }
4227
4228         if (defined $site_footer && -f $site_footer) {
4229                 insert_file($site_footer);
4230         }
4231
4232         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4233         if (defined $action &&
4234             $action eq 'blame_incremental') {
4235                 print qq!<script type="text/javascript">\n!.
4236                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4237                       qq!           "!. href() .qq!");\n!.
4238                       qq!</script>\n!;
4239         } else {
4240                 my ($jstimezone, $tz_cookie, $datetime_class) =
4241                         gitweb_get_feature('javascript-timezone');
4242
4243                 print qq!<script type="text/javascript">\n!.
4244                       qq!window.onload = function () {\n!;
4245                 if (gitweb_check_feature('javascript-actions')) {
4246                         print qq!       fixLinks();\n!;
4247                 }
4248                 if ($jstimezone && $tz_cookie && $datetime_class) {
4249                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4250                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4251                 }
4252                 print qq!};\n!.
4253                       qq!</script>\n!;
4254         }
4255
4256         print "</body>\n" .
4257               "</html>";
4258 }
4259
4260 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4261 # Example: die_error(404, 'Hash not found')
4262 # By convention, use the following status codes (as defined in RFC 2616):
4263 # 400: Invalid or missing CGI parameters, or
4264 #      requested object exists but has wrong type.
4265 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4266 #      this server or project.
4267 # 404: Requested object/revision/project doesn't exist.
4268 # 500: The server isn't configured properly, or
4269 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4270 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4271 # 503: The server is currently unavailable (because it is overloaded,
4272 #      or down for maintenance).  Generally, this is a temporary state.
4273 sub die_error {
4274         my $status = shift || 500;
4275         my $error = esc_html(shift) || "Internal Server Error";
4276         my $extra = shift;
4277         my %opts = @_;
4278
4279         my %http_responses = (
4280                 400 => '400 Bad Request',
4281                 403 => '403 Forbidden',
4282                 404 => '404 Not Found',
4283                 500 => '500 Internal Server Error',
4284                 503 => '503 Service Unavailable',
4285         );
4286         git_header_html($http_responses{$status}, undef, %opts);
4287         print <<EOF;
4288 <div class="page_body">
4289 <br /><br />
4290 $status - $error
4291 <br />
4292 EOF
4293         if (defined $extra) {
4294                 print "<hr />\n" .
4295                       "$extra\n";
4296         }
4297         print "</div>\n";
4298
4299         git_footer_html();
4300         goto DONE_GITWEB
4301                 unless ($opts{'-error_handler'});
4302 }
4303
4304 ## ----------------------------------------------------------------------
4305 ## functions printing or outputting HTML: navigation
4306
4307 sub git_print_page_nav {
4308         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4309         $extra = '' if !defined $extra; # pager or formats
4310
4311         my @navs = qw(summary shortlog log commit commitdiff tree);
4312         if ($suppress) {
4313                 @navs = grep { $_ ne $suppress } @navs;
4314         }
4315
4316         my %arg = map { $_ => {action=>$_} } @navs;
4317         if (defined $head) {
4318                 for (qw(commit commitdiff)) {
4319                         $arg{$_}{'hash'} = $head;
4320                 }
4321                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4322                         for (qw(shortlog log)) {
4323                                 $arg{$_}{'hash'} = $head;
4324                         }
4325                 }
4326         }
4327
4328         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4329         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4330
4331         my @actions = gitweb_get_feature('actions');
4332         my %repl = (
4333                 '%' => '%',
4334                 'n' => $project,         # project name
4335                 'f' => $git_dir,         # project path within filesystem
4336                 'h' => $treehead || '',  # current hash ('h' parameter)
4337                 'b' => $treebase || '',  # hash base ('hb' parameter)
4338         );
4339         while (@actions) {
4340                 my ($label, $link, $pos) = splice(@actions,0,3);
4341                 # insert
4342                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4343                 # munch munch
4344                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4345                 $arg{$label}{'_href'} = $link;
4346         }
4347
4348         print "<div class=\"page_nav\">\n" .
4349                 (join " | ",
4350                  map { $_ eq $current ?
4351                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4352                  } @navs);
4353         print "<br/>\n$extra<br/>\n" .
4354               "</div>\n";
4355 }
4356
4357 # returns a submenu for the nagivation of the refs views (tags, heads,
4358 # remotes) with the current view disabled and the remotes view only
4359 # available if the feature is enabled
4360 sub format_ref_views {
4361         my ($current) = @_;
4362         my @ref_views = qw{tags heads};
4363         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4364         return join " | ", map {
4365                 $_ eq $current ? $_ :
4366                 $cgi->a({-href => href(action=>$_)}, $_)
4367         } @ref_views
4368 }
4369
4370 sub format_paging_nav {
4371         my ($action, $page, $has_next_link) = @_;
4372         my $paging_nav;
4373
4374
4375         if ($page > 0) {
4376                 $paging_nav .=
4377                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4378                         " &sdot; " .
4379                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4380                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4381         } else {
4382                 $paging_nav .= "first &sdot; prev";
4383         }
4384
4385         if ($has_next_link) {
4386                 $paging_nav .= " &sdot; " .
4387                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4388                                  -accesskey => "n", -title => "Alt-n"}, "next");
4389         } else {
4390                 $paging_nav .= " &sdot; next";
4391         }
4392
4393         return $paging_nav;
4394 }
4395
4396 ## ......................................................................
4397 ## functions printing or outputting HTML: div
4398
4399 sub git_print_header_div {
4400         my ($action, $title, $hash, $hash_base) = @_;
4401         my %args = ();
4402
4403         $args{'action'} = $action;
4404         $args{'hash'} = $hash if $hash;
4405         $args{'hash_base'} = $hash_base if $hash_base;
4406
4407         print "<div class=\"header\">\n" .
4408               $cgi->a({-href => href(%args), -class => "title"},
4409               $title ? $title : $action) .
4410               "\n</div>\n";
4411 }
4412
4413 sub format_repo_url {
4414         my ($name, $url) = @_;
4415         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4416 }
4417
4418 # Group output by placing it in a DIV element and adding a header.
4419 # Options for start_div() can be provided by passing a hash reference as the
4420 # first parameter to the function.
4421 # Options to git_print_header_div() can be provided by passing an array
4422 # reference. This must follow the options to start_div if they are present.
4423 # The content can be a scalar, which is output as-is, a scalar reference, which
4424 # is output after html escaping, an IO handle passed either as *handle or
4425 # *handle{IO}, or a function reference. In the latter case all following
4426 # parameters will be taken as argument to the content function call.
4427 sub git_print_section {
4428         my ($div_args, $header_args, $content);
4429         my $arg = shift;
4430         if (ref($arg) eq 'HASH') {
4431                 $div_args = $arg;
4432                 $arg = shift;
4433         }
4434         if (ref($arg) eq 'ARRAY') {
4435                 $header_args = $arg;
4436                 $arg = shift;
4437         }
4438         $content = $arg;
4439
4440         print $cgi->start_div($div_args);
4441         git_print_header_div(@$header_args);
4442
4443         if (ref($content) eq 'CODE') {
4444                 $content->(@_);
4445         } elsif (ref($content) eq 'SCALAR') {
4446                 print esc_html($$content);
4447         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4448                 print <$content>;
4449         } elsif (!ref($content) && defined($content)) {
4450                 print $content;
4451         }
4452
4453         print $cgi->end_div;
4454 }
4455
4456 sub format_timestamp_html {
4457         my $date = shift;
4458         my $strtime = $date->{'rfc2822'};
4459
4460         my (undef, undef, $datetime_class) =
4461                 gitweb_get_feature('javascript-timezone');
4462         if ($datetime_class) {
4463                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4464         }
4465
4466         my $localtime_format = '(%02d:%02d %s)';
4467         if ($date->{'hour_local'} < 6) {
4468                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4469         }
4470         $strtime .= ' ' .
4471                     sprintf($localtime_format,
4472                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4473
4474         return $strtime;
4475 }
4476
4477 # Outputs the author name and date in long form
4478 sub git_print_authorship {
4479         my $co = shift;
4480         my %opts = @_;
4481         my $tag = $opts{-tag} || 'div';
4482         my $author = $co->{'author_name'};
4483
4484         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4485         print "<$tag class=\"author_date\">" .
4486               format_search_author($author, "author", esc_html($author)) .
4487               " [".format_timestamp_html(\%ad)."]".
4488               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4489               "</$tag>\n";
4490 }
4491
4492 # Outputs table rows containing the full author or committer information,
4493 # in the format expected for 'commit' view (& similar).
4494 # Parameters are a commit hash reference, followed by the list of people
4495 # to output information for. If the list is empty it defaults to both
4496 # author and committer.
4497 sub git_print_authorship_rows {
4498         my $co = shift;
4499         # too bad we can't use @people = @_ || ('author', 'committer')
4500         my @people = @_;
4501         @people = ('author', 'committer') unless @people;
4502         foreach my $who (@people) {
4503                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4504                 print "<tr><td>$who</td><td>" .
4505                       format_search_author($co->{"${who}_name"}, $who,
4506                                            esc_html($co->{"${who}_name"})) . " " .
4507                       format_search_author($co->{"${who}_email"}, $who,
4508                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4509                       "</td><td rowspan=\"2\">" .
4510                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4511                       "</td></tr>\n" .
4512                       "<tr>" .
4513                       "<td></td><td>" .
4514                       format_timestamp_html(\%wd) .
4515                       "</td>" .
4516                       "</tr>\n";
4517         }
4518 }
4519
4520 sub git_print_page_path {
4521         my $name = shift;
4522         my $type = shift;
4523         my $hb = shift;
4524
4525
4526         print "<div class=\"page_path\">";
4527         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4528                       -title => 'tree root'}, to_utf8("[$project]"));
4529         print " / ";
4530         if (defined $name) {
4531                 my @dirname = split '/', $name;
4532                 my $basename = pop @dirname;
4533                 my $fullname = '';
4534
4535                 foreach my $dir (@dirname) {
4536                         $fullname .= ($fullname ? '/' : '') . $dir;
4537                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4538                                                      hash_base=>$hb),
4539                                       -title => $fullname}, esc_path($dir));
4540                         print " / ";
4541                 }
4542                 if (defined $type && $type eq 'blob') {
4543                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4544                                                      hash_base=>$hb),
4545                                       -title => $name}, esc_path($basename));
4546                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4547 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4548 <script>
4549 function toggleLineNumbers() {
4550         e = document.getElementById("lineNoStyle");
4551         e2 = document.getElementById("lineNoToggle");
4552         if (e2.innerHTML == "[Hide line numbers]") {
4553                 e.innerHTML = ".linenr { display:none; }";
4554                 e2.innerHTML = "[Show line numbers]";
4555         }
4556         else {
4557                 e.innerHTML = "";
4558                 e2.innerHTML = "[Hide line numbers]";
4559         }
4560 }
4561 var style = document.createElement("style");
4562 style.setAttribute("id", "lineNoStyle");
4563 document.getElementsByTagName("head")[0].appendChild(style);
4564 toggleLineNumbers();
4565 </script>
4566 ';
4567                 } elsif (defined $type && $type eq 'tree') {
4568                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4569                                                      hash_base=>$hb),
4570                                       -title => $name}, esc_path($basename));
4571                         print " / ";
4572                 } else {
4573                         print esc_path($basename);
4574                 }
4575         }
4576         print "<br/></div>\n";
4577 }
4578
4579 sub git_print_log {
4580         my $log = shift;
4581         my %opts = @_;
4582
4583         if ($opts{'-remove_title'}) {
4584                 # remove title, i.e. first line of log
4585                 shift @$log;
4586         }
4587         # remove leading empty lines
4588         while (defined $log->[0] && $log->[0] eq "") {
4589                 shift @$log;
4590         }
4591
4592         # print log
4593         my $skip_blank_line = 0;
4594         foreach my $line (@$log) {
4595                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4596                         if (! $opts{'-remove_signoff'}) {
4597                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4598                                 $skip_blank_line = 1;
4599                         }
4600                         next;
4601                 }
4602
4603                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4604                         if (! $opts{'-remove_signoff'}) {
4605                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4606                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4607                                         "</span><br/>\n";
4608                                 $skip_blank_line = 1;
4609                         }
4610                         next;
4611                 }
4612
4613                 # print only one empty line
4614                 # do not print empty line after signoff
4615                 if ($line eq "") {
4616                         next if ($skip_blank_line);
4617                         $skip_blank_line = 1;
4618                 } else {
4619                         $skip_blank_line = 0;
4620                 }
4621
4622                 print format_log_line_html($line) . "<br/>\n";
4623         }
4624
4625         if ($opts{'-final_empty_line'}) {
4626                 # end with single empty line
4627                 print "<br/>\n" unless $skip_blank_line;
4628         }
4629 }
4630
4631 # return link target (what link points to)
4632 sub git_get_link_target {
4633         my $hash = shift;
4634         my $link_target;
4635
4636         # read link
4637         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4638                 or return;
4639         {
4640                 local $/ = undef;
4641                 $link_target = <$fd>;
4642         }
4643         close $fd
4644                 or return;
4645
4646         return $link_target;
4647 }
4648
4649 # given link target, and the directory (basedir) the link is in,
4650 # return target of link relative to top directory (top tree);
4651 # return undef if it is not possible (including absolute links).
4652 sub normalize_link_target {
4653         my ($link_target, $basedir) = @_;
4654
4655         # absolute symlinks (beginning with '/') cannot be normalized
4656         return if (substr($link_target, 0, 1) eq '/');
4657
4658         # normalize link target to path from top (root) tree (dir)
4659         my $path;
4660         if ($basedir) {
4661                 $path = $basedir . '/' . $link_target;
4662         } else {
4663                 # we are in top (root) tree (dir)
4664                 $path = $link_target;
4665         }
4666
4667         # remove //, /./, and /../
4668         my @path_parts;
4669         foreach my $part (split('/', $path)) {
4670                 # discard '.' and ''
4671                 next if (!$part || $part eq '.');
4672                 # handle '..'
4673                 if ($part eq '..') {
4674                         if (@path_parts) {
4675                                 pop @path_parts;
4676                         } else {
4677                                 # link leads outside repository (outside top dir)
4678                                 return;
4679                         }
4680                 } else {
4681                         push @path_parts, $part;
4682                 }
4683         }
4684         $path = join('/', @path_parts);
4685
4686         return $path;
4687 }
4688
4689 # print tree entry (row of git_tree), but without encompassing <tr> element
4690 sub git_print_tree_entry {
4691         my ($t, $basedir, $hash_base, $have_blame) = @_;
4692
4693         my %base_key = ();
4694         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4695
4696         # The format of a table row is: mode list link.  Where mode is
4697         # the mode of the entry, list is the name of the entry, an href,
4698         # and link is the action links of the entry.
4699
4700         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4701         if (exists $t->{'size'}) {
4702                 print "<td class=\"size\">$t->{'size'}</td>\n";
4703         }
4704         if ($t->{'type'} eq "blob") {
4705                 print "<td class=\"list\">" .
4706                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4707                                                file_name=>"$basedir$t->{'name'}", %base_key),
4708                                 -class => "list"}, esc_path($t->{'name'}));
4709                 if (S_ISLNK(oct $t->{'mode'})) {
4710                         my $link_target = git_get_link_target($t->{'hash'});
4711                         if ($link_target) {
4712                                 my $norm_target = normalize_link_target($link_target, $basedir);
4713                                 if (defined $norm_target) {
4714                                         print " -> " .
4715                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4716                                                                      file_name=>$norm_target),
4717                                                        -title => $norm_target}, esc_path($link_target));
4718                                 } else {
4719                                         print " -> " . esc_path($link_target);
4720                                 }
4721                         }
4722                 }
4723                 print "</td>\n";
4724                 print "<td class=\"link\">";
4725                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4726                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4727                               "blob");
4728                 if ($have_blame) {
4729                         print " | " .
4730                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4731                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4732                                       "blame");
4733                 }
4734                 if (defined $hash_base) {
4735                         print " | " .
4736                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4737                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4738                                       "history");
4739                 }
4740                 print " | " .
4741                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4742                                                file_name=>"$basedir$t->{'name'}")},
4743                                 "raw");
4744                 print "</td>\n";
4745
4746         } elsif ($t->{'type'} eq "tree") {
4747                 print "<td class=\"list\">";
4748                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4749                                              file_name=>"$basedir$t->{'name'}",
4750                                              %base_key)},
4751                               esc_path($t->{'name'}));
4752                 print "</td>\n";
4753                 print "<td class=\"link\">";
4754                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4755                                              file_name=>"$basedir$t->{'name'}",
4756                                              %base_key)},
4757                               "tree");
4758                 if (defined $hash_base) {
4759                         print " | " .
4760                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4761                                                      file_name=>"$basedir$t->{'name'}")},
4762                                       "history");
4763                 }
4764                 print "</td>\n";
4765         } else {
4766                 # unknown object: we can only present history for it
4767                 # (this includes 'commit' object, i.e. submodule support)
4768                 print "<td class=\"list\">" .
4769                       esc_path($t->{'name'}) .
4770                       "</td>\n";
4771                 print "<td class=\"link\">";
4772                 if (defined $hash_base) {
4773                         print $cgi->a({-href => href(action=>"history",
4774                                                      hash_base=>$hash_base,
4775                                                      file_name=>"$basedir$t->{'name'}")},
4776                                       "history");
4777                 }
4778                 print "</td>\n";
4779         }
4780 }
4781
4782 ## ......................................................................
4783 ## functions printing large fragments of HTML
4784
4785 # get pre-image filenames for merge (combined) diff
4786 sub fill_from_file_info {
4787         my ($diff, @parents) = @_;
4788
4789         $diff->{'from_file'} = [ ];
4790         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4791         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4792                 if ($diff->{'status'}[$i] eq 'R' ||
4793                     $diff->{'status'}[$i] eq 'C') {
4794                         $diff->{'from_file'}[$i] =
4795                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4796                 }
4797         }
4798
4799         return $diff;
4800 }
4801
4802 # is current raw difftree line of file deletion
4803 sub is_deleted {
4804         my $diffinfo = shift;
4805
4806         return $diffinfo->{'to_id'} eq ('0' x 40);
4807 }
4808
4809 # does patch correspond to [previous] difftree raw line
4810 # $diffinfo  - hashref of parsed raw diff format
4811 # $patchinfo - hashref of parsed patch diff format
4812 #              (the same keys as in $diffinfo)
4813 sub is_patch_split {
4814         my ($diffinfo, $patchinfo) = @_;
4815
4816         return defined $diffinfo && defined $patchinfo
4817                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4818 }
4819
4820
4821 sub git_difftree_body {
4822         my ($difftree, $hash, @parents) = @_;
4823         my ($parent) = $parents[0];
4824         my $have_blame = gitweb_check_feature('blame');
4825         print "<div class=\"list_head\">\n";
4826         if ($#{$difftree} > 10) {
4827                 print(($#{$difftree} + 1) . " files changed:\n");
4828         }
4829         print "</div>\n";
4830
4831         print "<table class=\"" .
4832               (@parents > 1 ? "combined " : "") .
4833               "diff_tree\">\n";
4834
4835         # header only for combined diff in 'commitdiff' view
4836         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4837         if ($has_header) {
4838                 # table header
4839                 print "<thead><tr>\n" .
4840                        "<th></th><th></th>\n"; # filename, patchN link
4841                 for (my $i = 0; $i < @parents; $i++) {
4842                         my $par = $parents[$i];
4843                         print "<th>" .
4844                               $cgi->a({-href => href(action=>"commitdiff",
4845                                                      hash=>$hash, hash_parent=>$par),
4846                                        -title => 'commitdiff to parent number ' .
4847                                                   ($i+1) . ': ' . substr($par,0,7)},
4848                                       $i+1) .
4849                               "&nbsp;</th>\n";
4850                 }
4851                 print "</tr></thead>\n<tbody>\n";
4852         }
4853
4854         my $alternate = 1;
4855         my $patchno = 0;
4856         foreach my $line (@{$difftree}) {
4857                 my $diff = parsed_difftree_line($line);
4858
4859                 if ($alternate) {
4860                         print "<tr class=\"dark\">\n";
4861                 } else {
4862                         print "<tr class=\"light\">\n";
4863                 }
4864                 $alternate ^= 1;
4865
4866                 if (exists $diff->{'nparents'}) { # combined diff
4867
4868                         fill_from_file_info($diff, @parents)
4869                                 unless exists $diff->{'from_file'};
4870
4871                         if (!is_deleted($diff)) {
4872                                 # file exists in the result (child) commit
4873                                 print "<td>" .
4874                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4875                                                              file_name=>$diff->{'to_file'},
4876                                                              hash_base=>$hash),
4877                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4878                                       "</td>\n";
4879                         } else {
4880                                 print "<td>" .
4881                                       esc_path($diff->{'to_file'}) .
4882                                       "</td>\n";
4883                         }
4884
4885                         if ($action eq 'commitdiff') {
4886                                 # link to patch
4887                                 $patchno++;
4888                                 print "<td class=\"link\">" .
4889                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4890                                               "patch") .
4891                                       " | " .
4892                                       "</td>\n";
4893                         }
4894
4895                         my $has_history = 0;
4896                         my $not_deleted = 0;
4897                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4898                                 my $hash_parent = $parents[$i];
4899                                 my $from_hash = $diff->{'from_id'}[$i];
4900                                 my $from_path = $diff->{'from_file'}[$i];
4901                                 my $status = $diff->{'status'}[$i];
4902
4903                                 $has_history ||= ($status ne 'A');
4904                                 $not_deleted ||= ($status ne 'D');
4905
4906                                 if ($status eq 'A') {
4907                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4908                                 } elsif ($status eq 'D') {
4909                                         print "<td class=\"link\">" .
4910                                               $cgi->a({-href => href(action=>"blob",
4911                                                                      hash_base=>$hash,
4912                                                                      hash=>$from_hash,
4913                                                                      file_name=>$from_path)},
4914                                                       "blob" . ($i+1)) .
4915                                               " | </td>\n";
4916                                 } else {
4917                                         if ($diff->{'to_id'} eq $from_hash) {
4918                                                 print "<td class=\"link nochange\">";
4919                                         } else {
4920                                                 print "<td class=\"link\">";
4921                                         }
4922                                         print $cgi->a({-href => href(action=>"blobdiff",
4923                                                                      hash=>$diff->{'to_id'},
4924                                                                      hash_parent=>$from_hash,
4925                                                                      hash_base=>$hash,
4926                                                                      hash_parent_base=>$hash_parent,
4927                                                                      file_name=>$diff->{'to_file'},
4928                                                                      file_parent=>$from_path)},
4929                                                       "diff" . ($i+1)) .
4930                                               " | </td>\n";
4931                                 }
4932                         }
4933
4934                         print "<td class=\"link\">";
4935                         if ($not_deleted) {
4936                                 print $cgi->a({-href => href(action=>"blob",
4937                                                              hash=>$diff->{'to_id'},
4938                                                              file_name=>$diff->{'to_file'},
4939                                                              hash_base=>$hash)},
4940                                               "blob");
4941                                 print " | " if ($has_history);
4942                         }
4943                         if ($has_history) {
4944                                 print $cgi->a({-href => href(action=>"history",
4945                                                              file_name=>$diff->{'to_file'},
4946                                                              hash_base=>$hash)},
4947                                               "history");
4948                         }
4949                         print "</td>\n";
4950
4951                         print "</tr>\n";
4952                         next; # instead of 'else' clause, to avoid extra indent
4953                 }
4954                 # else ordinary diff
4955
4956                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4957                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4958                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4959                         $to_mode_oct = oct $diff->{'to_mode'};
4960                         if (S_ISREG($to_mode_oct)) { # only for regular file
4961                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4962                         }
4963                         $to_file_type = file_type($diff->{'to_mode'});
4964                 }
4965                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4966                         $from_mode_oct = oct $diff->{'from_mode'};
4967                         if (S_ISREG($from_mode_oct)) { # only for regular file
4968                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4969                         }
4970                         $from_file_type = file_type($diff->{'from_mode'});
4971                 }
4972
4973                 if ($diff->{'status'} eq "A") { # created
4974                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4975                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4976                         $mode_chng   .= "]</span>";
4977                         print "<td>";
4978                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4979                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4980                                       -class => "list"}, esc_path($diff->{'file'}));
4981                         print "</td>\n";
4982                         print "<td>$mode_chng</td>\n";
4983                         print "<td class=\"link\">";
4984                         if ($action eq 'commitdiff') {
4985                                 # link to patch
4986                                 $patchno++;
4987                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4988                                               "patch") .
4989                                       " | ";
4990                         }
4991                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4992                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4993                                       "blob");
4994                         print "</td>\n";
4995
4996                 } elsif ($diff->{'status'} eq "D") { # deleted
4997                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4998                         print "<td>";
4999                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5000                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5001                                        -class => "list"}, esc_path($diff->{'file'}));
5002                         print "</td>\n";
5003                         print "<td>$mode_chng</td>\n";
5004                         print "<td class=\"link\">";
5005                         if ($action eq 'commitdiff') {
5006                                 # link to patch
5007                                 $patchno++;
5008                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5009                                               "patch") .
5010                                       " | ";
5011                         }
5012                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5013                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5014                                       "blob") . " | ";
5015                         if ($have_blame) {
5016                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5017                                                              file_name=>$diff->{'file'})},
5018                                               "blame") . " | ";
5019                         }
5020                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5021                                                      file_name=>$diff->{'file'})},
5022                                       "history");
5023                         print "</td>\n";
5024
5025                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5026                         my $mode_chnge = "";
5027                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5028                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5029                                 if ($from_file_type ne $to_file_type) {
5030                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5031                                 }
5032                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5033                                         if ($from_mode_str && $to_mode_str) {
5034                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5035                                         } elsif ($to_mode_str) {
5036                                                 $mode_chnge .= " mode: $to_mode_str";
5037                                         }
5038                                 }
5039                                 $mode_chnge .= "]</span>\n";
5040                         }
5041                         print "<td>";
5042                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5043                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5044                                       -class => "list"}, esc_path($diff->{'file'}));
5045                         print "</td>\n";
5046                         print "<td>$mode_chnge</td>\n";
5047                         print "<td class=\"link\">";
5048                         if ($action eq 'commitdiff') {
5049                                 # link to patch
5050                                 $patchno++;
5051                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5052                                               "patch") .
5053                                       " | ";
5054                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5055                                 # "commit" view and modified file (not onlu mode changed)
5056                                 print $cgi->a({-href => href(action=>"blobdiff",
5057                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5058                                                              hash_base=>$hash, hash_parent_base=>$parent,
5059                                                              file_name=>$diff->{'file'})},
5060                                               "diff") .
5061                                       " | ";
5062                         }
5063                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5064                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5065                                        "blob") . " | ";
5066                         if ($have_blame) {
5067                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5068                                                              file_name=>$diff->{'file'})},
5069                                               "blame") . " | ";
5070                         }
5071                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5072                                                      file_name=>$diff->{'file'})},
5073                                       "history");
5074                         print "</td>\n";
5075
5076                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5077                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5078                         my $nstatus = $status_name{$diff->{'status'}};
5079                         my $mode_chng = "";
5080                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5081                                 # mode also for directories, so we cannot use $to_mode_str
5082                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5083                         }
5084                         print "<td>" .
5085                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5086                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5087                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5088                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5089                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5090                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5091                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5092                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5093                               "<td class=\"link\">";
5094                         if ($action eq 'commitdiff') {
5095                                 # link to patch
5096                                 $patchno++;
5097                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5098                                               "patch") .
5099                                       " | ";
5100                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5101                                 # "commit" view and modified file (not only pure rename or copy)
5102                                 print $cgi->a({-href => href(action=>"blobdiff",
5103                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5104                                                              hash_base=>$hash, hash_parent_base=>$parent,
5105                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5106                                               "diff") .
5107                                       " | ";
5108                         }
5109                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5110                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5111                                       "blob") . " | ";
5112                         if ($have_blame) {
5113                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5114                                                              file_name=>$diff->{'to_file'})},
5115                                               "blame") . " | ";
5116                         }
5117                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5118                                                     file_name=>$diff->{'to_file'})},
5119                                       "history");
5120                         print "</td>\n";
5121
5122                 } # we should not encounter Unmerged (U) or Unknown (X) status
5123                 print "</tr>\n";
5124         }
5125         print "</tbody>" if $has_header;
5126         print "</table>\n";
5127 }
5128
5129 # Print context lines and then rem/add lines in a side-by-side manner.
5130 sub print_sidebyside_diff_lines {
5131         my ($ctx, $rem, $add) = @_;
5132
5133         # print context block before add/rem block
5134         if (@$ctx) {
5135                 print join '',
5136                         '<div class="chunk_block ctx">',
5137                                 '<div class="old">',
5138                                 @$ctx,
5139                                 '</div>',
5140                                 '<div class="new">',
5141                                 @$ctx,
5142                                 '</div>',
5143                         '</div>';
5144         }
5145
5146         if (!@$add) {
5147                 # pure removal
5148                 print join '',
5149                         '<div class="chunk_block rem">',
5150                                 '<div class="old">',
5151                                 @$rem,
5152                                 '</div>',
5153                         '</div>';
5154         } elsif (!@$rem) {
5155                 # pure addition
5156                 print join '',
5157                         '<div class="chunk_block add">',
5158                                 '<div class="new">',
5159                                 @$add,
5160                                 '</div>',
5161                         '</div>';
5162         } else {
5163                 print join '',
5164                         '<div class="chunk_block chg">',
5165                                 '<div class="old">',
5166                                 @$rem,
5167                                 '</div>',
5168                                 '<div class="new">',
5169                                 @$add,
5170                                 '</div>',
5171                         '</div>';
5172         }
5173 }
5174
5175 # Print context lines and then rem/add lines in inline manner.
5176 sub print_inline_diff_lines {
5177         my ($ctx, $rem, $add) = @_;
5178
5179         print @$ctx, @$rem, @$add;
5180 }
5181
5182 # Format removed and added line, mark changed part and HTML-format them.
5183 # Implementation is based on contrib/diff-highlight
5184 sub format_rem_add_lines_pair {
5185         my ($rem, $add, $num_parents) = @_;
5186
5187         # We need to untabify lines before split()'ing them;
5188         # otherwise offsets would be invalid.
5189         chomp $rem;
5190         chomp $add;
5191         $rem = untabify($rem);
5192         $add = untabify($add);
5193
5194         my @rem = split(//, $rem);
5195         my @add = split(//, $add);
5196         my ($esc_rem, $esc_add);
5197         # Ignore leading +/- characters for each parent.
5198         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5199         my ($prefix_has_nonspace, $suffix_has_nonspace);
5200
5201         my $shorter = (@rem < @add) ? @rem : @add;
5202         while ($prefix_len < $shorter) {
5203                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5204
5205                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5206                 $prefix_len++;
5207         }
5208
5209         while ($prefix_len + $suffix_len < $shorter) {
5210                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5211
5212                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5213                 $suffix_len++;
5214         }
5215
5216         # Mark lines that are different from each other, but have some common
5217         # part that isn't whitespace.  If lines are completely different, don't
5218         # mark them because that would make output unreadable, especially if
5219         # diff consists of multiple lines.
5220         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5221                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5222                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5223                 $esc_add = esc_html_hl_regions($add, 'marked',
5224                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5225         } else {
5226                 $esc_rem = esc_html($rem, -nbsp=>1);
5227                 $esc_add = esc_html($add, -nbsp=>1);
5228         }
5229
5230         return format_diff_line(\$esc_rem, 'rem'),
5231                format_diff_line(\$esc_add, 'add');
5232 }
5233
5234 # HTML-format diff context, removed and added lines.
5235 sub format_ctx_rem_add_lines {
5236         my ($ctx, $rem, $add, $num_parents) = @_;
5237         my (@new_ctx, @new_rem, @new_add);
5238         my $can_highlight = 0;
5239         my $is_combined = ($num_parents > 1);
5240
5241         # Highlight if every removed line has a corresponding added line.
5242         if (@$add > 0 && @$add == @$rem) {
5243                 $can_highlight = 1;
5244
5245                 # Highlight lines in combined diff only if the chunk contains
5246                 # diff between the same version, e.g.
5247                 #
5248                 #    - a
5249                 #   -  b
5250                 #    + c
5251                 #   +  d
5252                 #
5253                 # Otherwise the highlightling would be confusing.
5254                 if ($is_combined) {
5255                         for (my $i = 0; $i < @$add; $i++) {
5256                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5257                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5258
5259                                 $prefix_rem =~ s/-/+/g;
5260
5261                                 if ($prefix_rem ne $prefix_add) {
5262                                         $can_highlight = 0;
5263                                         last;
5264                                 }
5265                         }
5266                 }
5267         }
5268
5269         if ($can_highlight) {
5270                 for (my $i = 0; $i < @$add; $i++) {
5271                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5272                                 $rem->[$i], $add->[$i], $num_parents);
5273                         push @new_rem, $line_rem;
5274                         push @new_add, $line_add;
5275                 }
5276         } else {
5277                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5278                 @new_add = map { format_diff_line($_, 'add') } @$add;
5279         }
5280
5281         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5282
5283         return (\@new_ctx, \@new_rem, \@new_add);
5284 }
5285
5286 # Print context lines and then rem/add lines.
5287 sub print_diff_lines {
5288         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5289         my $is_combined = $num_parents > 1;
5290
5291         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5292                 $num_parents);
5293
5294         if ($diff_style eq 'sidebyside' && !$is_combined) {
5295                 print_sidebyside_diff_lines($ctx, $rem, $add);
5296         } else {
5297                 # default 'inline' style and unknown styles
5298                 print_inline_diff_lines($ctx, $rem, $add);
5299         }
5300 }
5301
5302 sub print_diff_chunk {
5303         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5304         my (@ctx, @rem, @add);
5305
5306         # The class of the previous line.
5307         my $prev_class = '';
5308
5309         return unless @chunk;
5310
5311         # incomplete last line might be among removed or added lines,
5312         # or both, or among context lines: find which
5313         for (my $i = 1; $i < @chunk; $i++) {
5314                 if ($chunk[$i][0] eq 'incomplete') {
5315                         $chunk[$i][0] = $chunk[$i-1][0];
5316                 }
5317         }
5318
5319         # guardian
5320         push @chunk, ["", ""];
5321
5322         foreach my $line_info (@chunk) {
5323                 my ($class, $line) = @$line_info;
5324
5325                 # print chunk headers
5326                 if ($class && $class eq 'chunk_header') {
5327                         print format_diff_line($line, $class, $from, $to);
5328                         next;
5329                 }
5330
5331                 ## print from accumulator when have some add/rem lines or end
5332                 # of chunk (flush context lines), or when have add and rem
5333                 # lines and new block is reached (otherwise add/rem lines could
5334                 # be reordered)
5335                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5336                     (@rem && @add && $class ne $prev_class)) {
5337                         print_diff_lines(\@ctx, \@rem, \@add,
5338                                          $diff_style, $num_parents);
5339                         @ctx = @rem = @add = ();
5340                 }
5341
5342                 ## adding lines to accumulator
5343                 # guardian value
5344                 last unless $line;
5345                 # rem, add or change
5346                 if ($class eq 'rem') {
5347                         push @rem, $line;
5348                 } elsif ($class eq 'add') {
5349                         push @add, $line;
5350                 }
5351                 # context line
5352                 if ($class eq 'ctx') {
5353                         push @ctx, $line;
5354                 }
5355
5356                 $prev_class = $class;
5357         }
5358 }
5359
5360 sub git_patchset_body {
5361         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5362         my ($hash_parent) = $hash_parents[0];
5363
5364         my $is_combined = (@hash_parents > 1);
5365         my $patch_idx = 0;
5366         my $patch_number = 0;
5367         my $patch_line;
5368         my $diffinfo;
5369         my $to_name;
5370         my (%from, %to);
5371         my @chunk; # for side-by-side diff
5372
5373         print "<div class=\"patchset\">\n";
5374
5375         # skip to first patch
5376         while ($patch_line = <$fd>) {
5377                 chomp $patch_line;
5378
5379                 last if ($patch_line =~ m/^diff /);
5380         }
5381
5382  PATCH:
5383         while ($patch_line) {
5384
5385                 # parse "git diff" header line
5386                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5387                         # $1 is from_name, which we do not use
5388                         $to_name = unquote($2);
5389                         $to_name =~ s!^b/!!;
5390                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5391                         # $1 is 'cc' or 'combined', which we do not use
5392                         $to_name = unquote($2);
5393                 } else {
5394                         $to_name = undef;
5395                 }
5396
5397                 # check if current patch belong to current raw line
5398                 # and parse raw git-diff line if needed
5399                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5400                         # this is continuation of a split patch
5401                         print "<div class=\"patch cont\">\n";
5402                 } else {
5403                         # advance raw git-diff output if needed
5404                         $patch_idx++ if defined $diffinfo;
5405
5406                         # read and prepare patch information
5407                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5408
5409                         # compact combined diff output can have some patches skipped
5410                         # find which patch (using pathname of result) we are at now;
5411                         if ($is_combined) {
5412                                 while ($to_name ne $diffinfo->{'to_file'}) {
5413                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5414                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5415                                               "</div>\n";  # class="patch"
5416
5417                                         $patch_idx++;
5418                                         $patch_number++;
5419
5420                                         last if $patch_idx > $#$difftree;
5421                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5422                                 }
5423                         }
5424
5425                         # modifies %from, %to hashes
5426                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5427
5428                         # this is first patch for raw difftree line with $patch_idx index
5429                         # we index @$difftree array from 0, but number patches from 1
5430                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5431                 }
5432
5433                 # git diff header
5434                 #assert($patch_line =~ m/^diff /) if DEBUG;
5435                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5436                 $patch_number++;
5437                 # print "git diff" header
5438                 print format_git_diff_header_line($patch_line, $diffinfo,
5439                                                   \%from, \%to);
5440
5441                 # print extended diff header
5442                 print "<div class=\"diff extended_header\">\n";
5443         EXTENDED_HEADER:
5444                 while ($patch_line = <$fd>) {
5445                         chomp $patch_line;
5446
5447                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5448
5449                         print format_extended_diff_header_line($patch_line, $diffinfo,
5450                                                                \%from, \%to);
5451                 }
5452                 print "</div>\n"; # class="diff extended_header"
5453
5454                 # from-file/to-file diff header
5455                 if (! $patch_line) {
5456                         print "</div>\n"; # class="patch"
5457                         last PATCH;
5458                 }
5459                 next PATCH if ($patch_line =~ m/^diff /);
5460                 #assert($patch_line =~ m/^---/) if DEBUG;
5461
5462                 my $last_patch_line = $patch_line;
5463                 $patch_line = <$fd>;
5464                 chomp $patch_line;
5465                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5466
5467                 print format_diff_from_to_header($last_patch_line, $patch_line,
5468                                                  $diffinfo, \%from, \%to,
5469                                                  @hash_parents);
5470
5471                 # the patch itself
5472         LINE:
5473                 while ($patch_line = <$fd>) {
5474                         chomp $patch_line;
5475
5476                         next PATCH if ($patch_line =~ m/^diff /);
5477
5478                         my $class = diff_line_class($patch_line, \%from, \%to);
5479
5480                         if ($class eq 'chunk_header') {
5481                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5482                                 @chunk = ();
5483                         }
5484
5485                         push @chunk, [ $class, $patch_line ];
5486                 }
5487
5488         } continue {
5489                 if (@chunk) {
5490                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5491                         @chunk = ();
5492                 }
5493                 print "</div>\n"; # class="patch"
5494         }
5495
5496         # for compact combined (--cc) format, with chunk and patch simplification
5497         # the patchset might be empty, but there might be unprocessed raw lines
5498         for (++$patch_idx if $patch_number > 0;
5499              $patch_idx < @$difftree;
5500              ++$patch_idx) {
5501                 # read and prepare patch information
5502                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5503
5504                 # generate anchor for "patch" links in difftree / whatchanged part
5505                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5506                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5507                       "</div>\n";  # class="patch"
5508
5509                 $patch_number++;
5510         }
5511
5512         if ($patch_number == 0) {
5513                 if (@hash_parents > 1) {
5514                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5515                 } else {
5516                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5517                 }
5518         }
5519
5520         print "</div>\n"; # class="patchset"
5521 }
5522
5523 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5524
5525 sub git_project_search_form {
5526         my ($searchtext, $search_use_regexp) = @_;
5527
5528         my $limit = '';
5529         if ($project_filter) {
5530                 $limit = " in '$project_filter/'";
5531         }
5532
5533         print "<div class=\"projsearch\">\n";
5534         print $cgi->startform(-method => 'get', -action => $my_uri) .
5535               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5536         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5537                 if (defined $project_filter);
5538         print $cgi->textfield(-name => 's', -value => $searchtext,
5539                               -title => "Search project by name and description$limit",
5540                               -size => 60) . "\n" .
5541               "<span title=\"Extended regular expression\">" .
5542               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5543                              -checked => $search_use_regexp) .
5544               "</span>\n" .
5545               $cgi->submit(-name => 'btnS', -value => 'Search') .
5546               $cgi->end_form() . "\n" .
5547               $cgi->a({-href => href(project => undef, searchtext => undef,
5548                                      project_filter => $project_filter)},
5549                       esc_html("List all projects$limit")) . "<br />\n";
5550         print "</div>\n";
5551 }
5552
5553 # entry for given @keys needs filling if at least one of keys in list
5554 # is not present in %$project_info
5555 sub project_info_needs_filling {
5556         my ($project_info, @keys) = @_;
5557
5558         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5559         foreach my $key (@keys) {
5560                 if (!exists $project_info->{$key}) {
5561                         return 1;
5562                 }
5563         }
5564         return;
5565 }
5566
5567 # fills project list info (age, description, owner, category, forks, etc.)
5568 # for each project in the list, removing invalid projects from
5569 # returned list, or fill only specified info.
5570 #
5571 # Invalid projects are removed from the returned list if and only if you
5572 # ask 'age' or 'age_string' to be filled, because they are the only fields
5573 # that run unconditionally git command that requires repository, and
5574 # therefore do always check if project repository is invalid.
5575 #
5576 # USAGE:
5577 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5578 #   ensures that 'descr_long' and 'ctags' fields are filled
5579 # * @project_list = fill_project_list_info(\@project_list)
5580 #   ensures that all fields are filled (and invalid projects removed)
5581 #
5582 # NOTE: modifies $projlist, but does not remove entries from it
5583 sub fill_project_list_info {
5584         my ($projlist, @wanted_keys) = @_;
5585         my @projects;
5586         my $filter_set = sub { return @_; };
5587         if (@wanted_keys) {
5588                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5589                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5590         }
5591
5592         my $show_ctags = gitweb_check_feature('ctags');
5593  PROJECT:
5594         foreach my $pr (@$projlist) {
5595                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5596                         my (@activity) = git_get_last_activity($pr->{'path'});
5597                         unless (@activity) {
5598                                 next PROJECT;
5599                         }
5600                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5601                 }
5602                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5603                         my $descr = git_get_project_description($pr->{'path'}) || "";
5604                         $descr = to_utf8($descr);
5605                         $pr->{'descr_long'} = $descr;
5606                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5607                 }
5608                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5609                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5610                 }
5611                 if ($show_ctags &&
5612                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5613                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5614                 }
5615                 if ($projects_list_group_categories &&
5616                     project_info_needs_filling($pr, $filter_set->('category'))) {
5617                         my $cat = git_get_project_category($pr->{'path'}) ||
5618                                                            $project_list_default_category;
5619                         $pr->{'category'} = to_utf8($cat);
5620                 }
5621
5622                 push @projects, $pr;
5623         }
5624
5625         return @projects;
5626 }
5627
5628 sub sort_projects_list {
5629         my ($projlist, $order) = @_;
5630
5631         sub order_str {
5632                 my $key = shift;
5633                 return sub { $a->{$key} cmp $b->{$key} };
5634         }
5635
5636         sub order_num_then_undef {
5637                 my $key = shift;
5638                 return sub {
5639                         defined $a->{$key} ?
5640                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5641                                 (defined $b->{$key} ? 1 : 0)
5642                 };
5643         }
5644
5645         my %orderings = (
5646                 project => order_str('path'),
5647                 descr => order_str('descr_long'),
5648                 owner => order_str('owner'),
5649                 age => order_num_then_undef('age'),
5650         );
5651
5652         my $ordering = $orderings{$order};
5653         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5654 }
5655
5656 # returns a hash of categories, containing the list of project
5657 # belonging to each category
5658 sub build_projlist_by_category {
5659         my ($projlist, $from, $to) = @_;
5660         my %categories;
5661
5662         $from = 0 unless defined $from;
5663         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5664
5665         for (my $i = $from; $i <= $to; $i++) {
5666                 my $pr = $projlist->[$i];
5667                 push @{$categories{ $pr->{'category'} }}, $pr;
5668         }
5669
5670         return wantarray ? %categories : \%categories;
5671 }
5672
5673 # print 'sort by' <th> element, generating 'sort by $name' replay link
5674 # if that order is not selected
5675 sub print_sort_th {
5676         print format_sort_th(@_);
5677 }
5678
5679 sub format_sort_th {
5680         my ($name, $order, $header) = @_;
5681         my $sort_th = "";
5682         $header ||= ucfirst($name);
5683
5684         if ($order eq $name) {
5685                 $sort_th .= "<th>$header</th>\n";
5686         } else {
5687                 $sort_th .= "<th>" .
5688                             $cgi->a({-href => href(-replay=>1, order=>$name),
5689                                      -class => "header"}, $header) .
5690                             "</th>\n";
5691         }
5692
5693         return $sort_th;
5694 }
5695
5696 sub git_project_list_rows {
5697         my ($projlist, $from, $to, $check_forks) = @_;
5698
5699         $from = 0 unless defined $from;
5700         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5701
5702         my $alternate = 1;
5703         for (my $i = $from; $i <= $to; $i++) {
5704                 my $pr = $projlist->[$i];
5705
5706                 if ($alternate) {
5707                         print "<tr class=\"dark\">\n";
5708                 } else {
5709                         print "<tr class=\"light\">\n";
5710                 }
5711                 $alternate ^= 1;
5712
5713                 if ($check_forks) {
5714                         print "<td>";
5715                         if ($pr->{'forks'}) {
5716                                 my $nforks = scalar @{$pr->{'forks'}};
5717                                 if ($nforks > 0) {
5718                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5719                                                        -title => "$nforks forks"}, "+");
5720                                 } else {
5721                                         print $cgi->span({-title => "$nforks forks"}, "+");
5722                                 }
5723                         }
5724                         print "</td>\n";
5725                 }
5726                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5727                                         -class => "list"},
5728                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5729                       "</td>\n" .
5730                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5731                                         -class => "list",
5732                                         -title => $pr->{'descr_long'}},
5733                                         $search_regexp
5734                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5735                                                                     $pr->{'descr'}, $search_regexp)
5736                                         : esc_html($pr->{'descr'})) .
5737                       "</td>\n";
5738                 unless ($omit_owner) {
5739                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5740                 }
5741                 unless ($omit_age_column) {
5742                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5743                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5744                 }
5745                 print"<td class=\"link\">" .
5746                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5747                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5748                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5749                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5750                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5751                       "</td>\n" .
5752                       "</tr>\n";
5753         }
5754 }
5755
5756 sub git_project_list_body {
5757         # actually uses global variable $project
5758         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5759         my @projects = @$projlist;
5760
5761         my $check_forks = gitweb_check_feature('forks');
5762         my $show_ctags  = gitweb_check_feature('ctags');
5763         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5764         $check_forks = undef
5765                 if ($tagfilter || $search_regexp);
5766
5767         # filtering out forks before filling info allows to do less work
5768         @projects = filter_forks_from_projects_list(\@projects)
5769                 if ($check_forks);
5770         # search_projects_list pre-fills required info
5771         @projects = search_projects_list(\@projects,
5772                                          'search_regexp' => $search_regexp,
5773                                          'tagfilter'  => $tagfilter)
5774                 if ($tagfilter || $search_regexp);
5775         # fill the rest
5776         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5777         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5778         push @all_fields, 'owner' unless($omit_owner);
5779         @projects = fill_project_list_info(\@projects, @all_fields);
5780
5781         $order ||= $default_projects_order;
5782         $from = 0 unless defined $from;
5783         $to = $#projects if (!defined $to || $#projects < $to);
5784
5785         # short circuit
5786         if ($from > $to) {
5787                 print "<center>\n".
5788                       "<b>No such projects found</b><br />\n".
5789                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5790                       "</center>\n<br />\n";
5791                 return;
5792         }
5793
5794         @projects = sort_projects_list(\@projects, $order);
5795
5796         if ($show_ctags) {
5797                 my $ctags = git_gather_all_ctags(\@projects);
5798                 my $cloud = git_populate_project_tagcloud($ctags);
5799                 print git_show_project_tagcloud($cloud, 64);
5800         }
5801
5802         print "<table class=\"project_list\">\n";
5803         unless ($no_header) {
5804                 print "<tr>\n";
5805                 if ($check_forks) {
5806                         print "<th></th>\n";
5807                 }
5808                 print_sort_th('project', $order, 'Project');
5809                 print_sort_th('descr', $order, 'Description');
5810                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5811                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5812                 print "<th></th>\n" . # for links
5813                       "</tr>\n";
5814         }
5815
5816         if ($projects_list_group_categories) {
5817                 # only display categories with projects in the $from-$to window
5818                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5819                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5820                 foreach my $cat (sort keys %categories) {
5821                         unless ($cat eq "") {
5822                                 print "<tr>\n";
5823                                 if ($check_forks) {
5824                                         print "<td></td>\n";
5825                                 }
5826                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5827                                 print "</tr>\n";
5828                         }
5829
5830                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5831                 }
5832         } else {
5833                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5834         }
5835
5836         if (defined $extra) {
5837                 print "<tr>\n";
5838                 if ($check_forks) {
5839                         print "<td></td>\n";
5840                 }
5841                 print "<td colspan=\"5\">$extra</td>\n" .
5842                       "</tr>\n";
5843         }
5844         print "</table>\n";
5845 }
5846
5847 sub git_log_body {
5848         # uses global variable $project
5849         my ($commitlist, $from, $to, $refs, $extra) = @_;
5850
5851         $from = 0 unless defined $from;
5852         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5853
5854         for (my $i = 0; $i <= $to; $i++) {
5855                 my %co = %{$commitlist->[$i]};
5856                 next if !%co;
5857                 my $commit = $co{'id'};
5858                 my $ref = format_ref_marker($refs, $commit);
5859                 git_print_header_div('commit',
5860                                "<span class=\"age\">$co{'age_string'}</span>" .
5861                                esc_html($co{'title'}) . $ref,
5862                                $commit);
5863                 print "<div class=\"title_text\">\n" .
5864                       "<div class=\"log_link\">\n" .
5865                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5866                       " | " .
5867                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5868                       " | " .
5869                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5870                       "<br/>\n" .
5871                       "</div>\n";
5872                       git_print_authorship(\%co, -tag => 'span');
5873                       print "<br/>\n</div>\n";
5874
5875                 print "<div class=\"log_body\">\n";
5876                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5877                 print "</div>\n";
5878         }
5879         if ($extra) {
5880                 print "<div class=\"page_nav\">\n";
5881                 print "$extra\n";
5882                 print "</div>\n";
5883         }
5884 }
5885
5886 sub git_shortlog_body {
5887         # uses global variable $project
5888         my ($commitlist, $from, $to, $refs, $extra) = @_;
5889
5890         $from = 0 unless defined $from;
5891         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5892
5893         print "<table class=\"shortlog\">\n";
5894         my $alternate = 1;
5895         for (my $i = $from; $i <= $to; $i++) {
5896                 my %co = %{$commitlist->[$i]};
5897                 my $commit = $co{'id'};
5898                 my $ref = format_ref_marker($refs, $commit);
5899                 if ($alternate) {
5900                         print "<tr class=\"dark\">\n";
5901                 } else {
5902                         print "<tr class=\"light\">\n";
5903                 }
5904                 $alternate ^= 1;
5905                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5906                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5907                       format_author_html('td', \%co, 10) . "<td>";
5908                 print format_subject_html($co{'title'}, $co{'title_short'},
5909                                           href(action=>"commit", hash=>$commit), $ref);
5910                 print "</td>\n" .
5911                       "<td class=\"link\">" .
5912                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5913                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5914                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5915                 my $snapshot_links = format_snapshot_links($commit);
5916                 if (defined $snapshot_links) {
5917                         print " | " . $snapshot_links;
5918                 }
5919                 print "</td>\n" .
5920                       "</tr>\n";
5921         }
5922         if (defined $extra) {
5923                 print "<tr>\n" .
5924                       "<td colspan=\"4\">$extra</td>\n" .
5925                       "</tr>\n";
5926         }
5927         print "</table>\n";
5928 }
5929
5930 sub git_history_body {
5931         # Warning: assumes constant type (blob or tree) during history
5932         my ($commitlist, $from, $to, $refs, $extra,
5933             $file_name, $file_hash, $ftype) = @_;
5934
5935         $from = 0 unless defined $from;
5936         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5937
5938         print "<table class=\"history\">\n";
5939         my $alternate = 1;
5940         for (my $i = $from; $i <= $to; $i++) {
5941                 my %co = %{$commitlist->[$i]};
5942                 if (!%co) {
5943                         next;
5944                 }
5945                 my $commit = $co{'id'};
5946
5947                 my $ref = format_ref_marker($refs, $commit);
5948
5949                 if ($alternate) {
5950                         print "<tr class=\"dark\">\n";
5951                 } else {
5952                         print "<tr class=\"light\">\n";
5953                 }
5954                 $alternate ^= 1;
5955                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5956         # shortlog:   format_author_html('td', \%co, 10)
5957                       format_author_html('td', \%co, 15, 3) . "<td>";
5958                 # originally git_history used chop_str($co{'title'}, 50)
5959                 print format_subject_html($co{'title'}, $co{'title_short'},
5960                                           href(action=>"commit", hash=>$commit), $ref);
5961                 print "</td>\n" .
5962                       "<td class=\"link\">" .
5963                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5964                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5965
5966                 if ($ftype eq 'blob') {
5967                         my $blob_current = $file_hash;
5968                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5969                         if (defined $blob_current && defined $blob_parent &&
5970                                         $blob_current ne $blob_parent) {
5971                                 print " | " .
5972                                         $cgi->a({-href => href(action=>"blobdiff",
5973                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5974                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5975                                                                file_name=>$file_name)},
5976                                                 "diff to current");
5977                         }
5978                 }
5979                 print "</td>\n" .
5980                       "</tr>\n";
5981         }
5982         if (defined $extra) {
5983                 print "<tr>\n" .
5984                       "<td colspan=\"4\">$extra</td>\n" .
5985                       "</tr>\n";
5986         }
5987         print "</table>\n";
5988 }
5989
5990 sub git_tags_body {
5991         # uses global variable $project
5992         my ($taglist, $from, $to, $extra) = @_;
5993         $from = 0 unless defined $from;
5994         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5995
5996         print "<table class=\"tags\">\n";
5997         my $alternate = 1;
5998         for (my $i = $from; $i <= $to; $i++) {
5999                 my $entry = $taglist->[$i];
6000                 my %tag = %$entry;
6001                 my $comment = $tag{'subject'};
6002                 my $comment_short;
6003                 if (defined $comment) {
6004                         $comment_short = chop_str($comment, 30, 5);
6005                 }
6006                 if ($alternate) {
6007                         print "<tr class=\"dark\">\n";
6008                 } else {
6009                         print "<tr class=\"light\">\n";
6010                 }
6011                 $alternate ^= 1;
6012                 if (defined $tag{'age'}) {
6013                         print "<td><i>$tag{'age'}</i></td>\n";
6014                 } else {
6015                         print "<td></td>\n";
6016                 }
6017                 print "<td>" .
6018                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6019                                -class => "list name"}, esc_html($tag{'name'})) .
6020                       "</td>\n" .
6021                       "<td>";
6022                 if (defined $comment) {
6023                         print format_subject_html($comment, $comment_short,
6024                                                   href(action=>"tag", hash=>$tag{'id'}));
6025                 }
6026                 print "</td>\n" .
6027                       "<td class=\"selflink\">";
6028                 if ($tag{'type'} eq "tag") {
6029                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6030                 } else {
6031                         print "&nbsp;";
6032                 }
6033                 print "</td>\n" .
6034                       "<td class=\"link\">" . " | " .
6035                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6036                 if ($tag{'reftype'} eq "commit") {
6037                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6038                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6039                 } elsif ($tag{'reftype'} eq "blob") {
6040                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6041                 }
6042                 print "</td>\n" .
6043                       "</tr>";
6044         }
6045         if (defined $extra) {
6046                 print "<tr>\n" .
6047                       "<td colspan=\"5\">$extra</td>\n" .
6048                       "</tr>\n";
6049         }
6050         print "</table>\n";
6051 }
6052
6053 sub git_heads_body {
6054         # uses global variable $project
6055         my ($headlist, $head_at, $from, $to, $extra) = @_;
6056         $from = 0 unless defined $from;
6057         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6058
6059         print "<table class=\"heads\">\n";
6060         my $alternate = 1;
6061         for (my $i = $from; $i <= $to; $i++) {
6062                 my $entry = $headlist->[$i];
6063                 my %ref = %$entry;
6064                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6065                 if ($alternate) {
6066                         print "<tr class=\"dark\">\n";
6067                 } else {
6068                         print "<tr class=\"light\">\n";
6069                 }
6070                 $alternate ^= 1;
6071                 print "<td><i>$ref{'age'}</i></td>\n" .
6072                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6073                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6074                                -class => "list name"},esc_html($ref{'name'})) .
6075                       "</td>\n" .
6076                       "<td class=\"link\">" .
6077                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6078                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6079                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6080                       "</td>\n" .
6081                       "</tr>";
6082         }
6083         if (defined $extra) {
6084                 print "<tr>\n" .
6085                       "<td colspan=\"3\">$extra</td>\n" .
6086                       "</tr>\n";
6087         }
6088         print "</table>\n";
6089 }
6090
6091 # Display a single remote block
6092 sub git_remote_block {
6093         my ($remote, $rdata, $limit, $head) = @_;
6094
6095         my $heads = $rdata->{'heads'};
6096         my $fetch = $rdata->{'fetch'};
6097         my $push = $rdata->{'push'};
6098
6099         my $urls_table = "<table class=\"projects_list\">\n" ;
6100
6101         if (defined $fetch) {
6102                 if ($fetch eq $push) {
6103                         $urls_table .= format_repo_url("URL", $fetch);
6104                 } else {
6105                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6106                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6107                 }
6108         } elsif (defined $push) {
6109                 $urls_table .= format_repo_url("Push URL", $push);
6110         } else {
6111                 $urls_table .= format_repo_url("", "No remote URL");
6112         }
6113
6114         $urls_table .= "</table>\n";
6115
6116         my $dots;
6117         if (defined $limit && $limit < @$heads) {
6118                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6119         }
6120
6121         print $urls_table;
6122         git_heads_body($heads, $head, 0, $limit, $dots);
6123 }
6124
6125 # Display a list of remote names with the respective fetch and push URLs
6126 sub git_remotes_list {
6127         my ($remotedata, $limit) = @_;
6128         print "<table class=\"heads\">\n";
6129         my $alternate = 1;
6130         my @remotes = sort keys %$remotedata;
6131
6132         my $limited = $limit && $limit < @remotes;
6133
6134         $#remotes = $limit - 1 if $limited;
6135
6136         while (my $remote = shift @remotes) {
6137                 my $rdata = $remotedata->{$remote};
6138                 my $fetch = $rdata->{'fetch'};
6139                 my $push = $rdata->{'push'};
6140                 if ($alternate) {
6141                         print "<tr class=\"dark\">\n";
6142                 } else {
6143                         print "<tr class=\"light\">\n";
6144                 }
6145                 $alternate ^= 1;
6146                 print "<td>" .
6147                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6148                                -class=> "list name"},esc_html($remote)) .
6149                       "</td>";
6150                 print "<td class=\"link\">" .
6151                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6152                       " | " .
6153                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6154                       "</td>";
6155
6156                 print "</tr>\n";
6157         }
6158
6159         if ($limited) {
6160                 print "<tr>\n" .
6161                       "<td colspan=\"3\">" .
6162                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6163                       "</td>\n" . "</tr>\n";
6164         }
6165
6166         print "</table>";
6167 }
6168
6169 # Display remote heads grouped by remote, unless there are too many
6170 # remotes, in which case we only display the remote names
6171 sub git_remotes_body {
6172         my ($remotedata, $limit, $head) = @_;
6173         if ($limit and $limit < keys %$remotedata) {
6174                 git_remotes_list($remotedata, $limit);
6175         } else {
6176                 fill_remote_heads($remotedata);
6177                 while (my ($remote, $rdata) = each %$remotedata) {
6178                         git_print_section({-class=>"remote", -id=>$remote},
6179                                 ["remotes", $remote, $remote], sub {
6180                                         git_remote_block($remote, $rdata, $limit, $head);
6181                                 });
6182                 }
6183         }
6184 }
6185
6186 sub git_search_message {
6187         my %co = @_;
6188
6189         my $greptype;
6190         if ($searchtype eq 'commit') {
6191                 $greptype = "--grep=";
6192         } elsif ($searchtype eq 'author') {
6193                 $greptype = "--author=";
6194         } elsif ($searchtype eq 'committer') {
6195                 $greptype = "--committer=";
6196         }
6197         $greptype .= $searchtext;
6198         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6199                                        $greptype, '--regexp-ignore-case',
6200                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6201
6202         my $paging_nav = '';
6203         if ($page > 0) {
6204                 $paging_nav .=
6205                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6206                                 "first") .
6207                         " &sdot; " .
6208                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6209                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6210         } else {
6211                 $paging_nav .= "first &sdot; prev";
6212         }
6213         my $next_link = '';
6214         if ($#commitlist >= 100) {
6215                 $next_link =
6216                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6217                                  -accesskey => "n", -title => "Alt-n"}, "next");
6218                 $paging_nav .= " &sdot; $next_link";
6219         } else {
6220                 $paging_nav .= " &sdot; next";
6221         }
6222
6223         git_header_html();
6224
6225         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6226         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6227         if ($page == 0 && !@commitlist) {
6228                 print "<p>No match.</p>\n";
6229         } else {
6230                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6231         }
6232
6233         git_footer_html();
6234 }
6235
6236 sub git_search_changes {
6237         my %co = @_;
6238
6239         local $/ = "\n";
6240         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6241                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6242                 ($search_use_regexp ? '--pickaxe-regex' : ())
6243                         or die_error(500, "Open git-log failed");
6244
6245         git_header_html();
6246
6247         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6248         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6249
6250         print "<table class=\"pickaxe search\">\n";
6251         my $alternate = 1;
6252         undef %co;
6253         my @files;
6254         while (my $line = <$fd>) {
6255                 chomp $line;
6256                 next unless $line;
6257
6258                 my %set = parse_difftree_raw_line($line);
6259                 if (defined $set{'commit'}) {
6260                         # finish previous commit
6261                         if (%co) {
6262                                 print "</td>\n" .
6263                                       "<td class=\"link\">" .
6264                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6265                                               "commit") .
6266                                       " | " .
6267                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6268                                                              hash_base=>$co{'id'})},
6269                                               "tree") .
6270                                       "</td>\n" .
6271                                       "</tr>\n";
6272                         }
6273
6274                         if ($alternate) {
6275                                 print "<tr class=\"dark\">\n";
6276                         } else {
6277                                 print "<tr class=\"light\">\n";
6278                         }
6279                         $alternate ^= 1;
6280                         %co = parse_commit($set{'commit'});
6281                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6282                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6283                               "<td><i>$author</i></td>\n" .
6284                               "<td>" .
6285                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6286                                       -class => "list subject"},
6287                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6288                 } elsif (defined $set{'to_id'}) {
6289                         next if ($set{'to_id'} =~ m/^0{40}$/);
6290
6291                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6292                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6293                                       -class => "list"},
6294                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6295                               "<br/>\n";
6296                 }
6297         }
6298         close $fd;
6299
6300         # finish last commit (warning: repetition!)
6301         if (%co) {
6302                 print "</td>\n" .
6303                       "<td class=\"link\">" .
6304                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6305                               "commit") .
6306                       " | " .
6307                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6308                                              hash_base=>$co{'id'})},
6309                               "tree") .
6310                       "</td>\n" .
6311                       "</tr>\n";
6312         }
6313
6314         print "</table>\n";
6315
6316         git_footer_html();
6317 }
6318
6319 sub git_search_files {
6320         my %co = @_;
6321
6322         local $/ = "\n";
6323         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6324                 $search_use_regexp ? ('-E', '-i') : '-F',
6325                 $searchtext, $co{'tree'}
6326                         or die_error(500, "Open git-grep failed");
6327
6328         git_header_html();
6329
6330         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6331         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6332
6333         print "<table class=\"grep_search\">\n";
6334         my $alternate = 1;
6335         my $matches = 0;
6336         my $lastfile = '';
6337         my $file_href;
6338         while (my $line = <$fd>) {
6339                 chomp $line;
6340                 my ($file, $lno, $ltext, $binary);
6341                 last if ($matches++ > 1000);
6342                 if ($line =~ /^Binary file (.+) matches$/) {
6343                         $file = $1;
6344                         $binary = 1;
6345                 } else {
6346                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6347                         $file =~ s/^$co{'tree'}://;
6348                 }
6349                 if ($file ne $lastfile) {
6350                         $lastfile and print "</td></tr>\n";
6351                         if ($alternate++) {
6352                                 print "<tr class=\"dark\">\n";
6353                         } else {
6354                                 print "<tr class=\"light\">\n";
6355                         }
6356                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6357                                           file_name=>$file);
6358                         print "<td class=\"list\">".
6359                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6360                         print "</td><td>\n";
6361                         $lastfile = $file;
6362                 }
6363                 if ($binary) {
6364                         print "<div class=\"binary\">Binary file</div>\n";
6365                 } else {
6366                         $ltext = untabify($ltext);
6367                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6368                                 $ltext = esc_html($1, -nbsp=>1);
6369                                 $ltext .= '<span class="match">';
6370                                 $ltext .= esc_html($2, -nbsp=>1);
6371                                 $ltext .= '</span>';
6372                                 $ltext .= esc_html($3, -nbsp=>1);
6373                         } else {
6374                                 $ltext = esc_html($ltext, -nbsp=>1);
6375                         }
6376                         print "<div class=\"pre\">" .
6377                                 $cgi->a({-href => $file_href.'#l'.$lno,
6378                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6379                                 ' ' .  $ltext . "</div>\n";
6380                 }
6381         }
6382         if ($lastfile) {
6383                 print "</td></tr>\n";
6384                 if ($matches > 1000) {
6385                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6386                 }
6387         } else {
6388                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6389         }
6390         close $fd;
6391
6392         print "</table>\n";
6393
6394         git_footer_html();
6395 }
6396
6397 sub git_search_grep_body {
6398         my ($commitlist, $from, $to, $extra) = @_;
6399         $from = 0 unless defined $from;
6400         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6401
6402         print "<table class=\"commit_search\">\n";
6403         my $alternate = 1;
6404         for (my $i = $from; $i <= $to; $i++) {
6405                 my %co = %{$commitlist->[$i]};
6406                 if (!%co) {
6407                         next;
6408                 }
6409                 my $commit = $co{'id'};
6410                 if ($alternate) {
6411                         print "<tr class=\"dark\">\n";
6412                 } else {
6413                         print "<tr class=\"light\">\n";
6414                 }
6415                 $alternate ^= 1;
6416                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6417                       format_author_html('td', \%co, 15, 5) .
6418                       "<td>" .
6419                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6420                                -class => "list subject"},
6421                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6422                 my $comment = $co{'comment'};
6423                 foreach my $line (@$comment) {
6424                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6425                                 my ($lead, $match, $trail) = ($1, $2, $3);
6426                                 $match = chop_str($match, 70, 5, 'center');
6427                                 my $contextlen = int((80 - length($match))/2);
6428                                 $contextlen = 30 if ($contextlen > 30);
6429                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6430                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6431
6432                                 $lead  = esc_html($lead);
6433                                 $match = esc_html($match);
6434                                 $trail = esc_html($trail);
6435
6436                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6437                         }
6438                 }
6439                 print "</td>\n" .
6440                       "<td class=\"link\">" .
6441                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6442                       " | " .
6443                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6444                       " | " .
6445                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6446                 print "</td>\n" .
6447                       "</tr>\n";
6448         }
6449         if (defined $extra) {
6450                 print "<tr>\n" .
6451                       "<td colspan=\"3\">$extra</td>\n" .
6452                       "</tr>\n";
6453         }
6454         print "</table>\n";
6455 }
6456
6457 ## ======================================================================
6458 ## ======================================================================
6459 ## actions
6460
6461 sub git_project_list {
6462         my $order = $input_params{'order'};
6463         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6464                 die_error(400, "Unknown order parameter");
6465         }
6466
6467         my @list = git_get_projects_list($project_filter, $strict_export);
6468         if (!@list) {
6469                 die_error(404, "No projects found");
6470         }
6471
6472         git_header_html();
6473         if (defined $home_text && -f $home_text) {
6474                 print "<div class=\"index_include\">\n";
6475                 insert_file($home_text);
6476                 print "</div>\n";
6477         }
6478
6479         git_project_search_form($searchtext, $search_use_regexp);
6480         git_project_list_body(\@list, $order);
6481         git_footer_html();
6482 }
6483
6484 sub git_forks {
6485         my $order = $input_params{'order'};
6486         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6487                 die_error(400, "Unknown order parameter");
6488         }
6489
6490         my $filter = $project;
6491         $filter =~ s/\.git$//;
6492         my @list = git_get_projects_list($filter);
6493         if (!@list) {
6494                 die_error(404, "No forks found");
6495         }
6496
6497         git_header_html();
6498         git_print_page_nav('','');
6499         git_print_header_div('summary', "$project forks");
6500         git_project_list_body(\@list, $order);
6501         git_footer_html();
6502 }
6503
6504 sub git_project_index {
6505         my @projects = git_get_projects_list($project_filter, $strict_export);
6506         if (!@projects) {
6507                 die_error(404, "No projects found");
6508         }
6509
6510         print $cgi->header(
6511                 -type => 'text/plain',
6512                 -charset => 'utf-8',
6513                 -content_disposition => 'inline; filename="index.aux"');
6514
6515         foreach my $pr (@projects) {
6516                 if (!exists $pr->{'owner'}) {
6517                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6518                 }
6519
6520                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6521                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6522                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6523                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6524                 $path  =~ s/ /\+/g;
6525                 $owner =~ s/ /\+/g;
6526
6527                 print "$path $owner\n";
6528         }
6529 }
6530
6531 sub git_summary {
6532         my $descr = git_get_project_description($project) || "none";
6533         my %co = parse_commit("HEAD");
6534         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6535         my $head = $co{'id'};
6536         my $remote_heads = gitweb_check_feature('remote_heads');
6537
6538         my $owner = git_get_project_owner($project);
6539
6540         my $refs = git_get_references();
6541         # These get_*_list functions return one more to allow us to see if
6542         # there are more ...
6543         my @taglist  = git_get_tags_list(16);
6544         my @headlist = git_get_heads_list(16);
6545         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6546         my @forklist;
6547         my $check_forks = gitweb_check_feature('forks');
6548
6549         if ($check_forks) {
6550                 # find forks of a project
6551                 my $filter = $project;
6552                 $filter =~ s/\.git$//;
6553                 @forklist = git_get_projects_list($filter);
6554                 # filter out forks of forks
6555                 @forklist = filter_forks_from_projects_list(\@forklist)
6556                         if (@forklist);
6557         }
6558
6559         git_header_html();
6560         git_print_page_nav('summary','', $head);
6561
6562         print "<div class=\"title\">&nbsp;</div>\n";
6563         print "<table class=\"projects_list\">\n" .
6564               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6565         if ($owner and not $omit_owner) {
6566                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6567         }
6568         if (defined $cd{'rfc2822'}) {
6569                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6570                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6571         }
6572
6573         # use per project git URL list in $projectroot/$project/cloneurl
6574         # or make project git URL from git base URL and project name
6575         my $url_tag = "URL";
6576         my @url_list = git_get_project_url_list($project);
6577         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6578         foreach my $git_url (@url_list) {
6579                 next unless $git_url;
6580                 print format_repo_url($url_tag, $git_url);
6581                 $url_tag = "";
6582         }
6583
6584         # Tag cloud
6585         my $show_ctags = gitweb_check_feature('ctags');
6586         if ($show_ctags) {
6587                 my $ctags = git_get_project_ctags($project);
6588                 if (%$ctags) {
6589                         # without ability to add tags, don't show if there are none
6590                         my $cloud = git_populate_project_tagcloud($ctags);
6591                         print "<tr id=\"metadata_ctags\">" .
6592                               "<td>content tags</td>" .
6593                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6594                               "</tr>\n";
6595                 }
6596         }
6597
6598         print "</table>\n";
6599
6600         # If XSS prevention is on, we don't include README.html.
6601         # TODO: Allow a readme in some safe format.
6602         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6603                 print "<div class=\"title\">readme</div>\n" .
6604                       "<div class=\"readme\">\n";
6605                 insert_file("$projectroot/$project/README.html");
6606                 print "\n</div>\n"; # class="readme"
6607         }
6608
6609         # we need to request one more than 16 (0..15) to check if
6610         # those 16 are all
6611         my @commitlist = $head ? parse_commits($head, 17) : ();
6612         if (@commitlist) {
6613                 git_print_header_div('shortlog');
6614                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6615                                   $#commitlist <=  15 ? undef :
6616                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6617         }
6618
6619         if (@taglist) {
6620                 git_print_header_div('tags');
6621                 git_tags_body(\@taglist, 0, 15,
6622                               $#taglist <=  15 ? undef :
6623                               $cgi->a({-href => href(action=>"tags")}, "..."));
6624         }
6625
6626         if (@headlist) {
6627                 git_print_header_div('heads');
6628                 git_heads_body(\@headlist, $head, 0, 15,
6629                                $#headlist <= 15 ? undef :
6630                                $cgi->a({-href => href(action=>"heads")}, "..."));
6631         }
6632
6633         if (%remotedata) {
6634                 git_print_header_div('remotes');
6635                 git_remotes_body(\%remotedata, 15, $head);
6636         }
6637
6638         if (@forklist) {
6639                 git_print_header_div('forks');
6640                 git_project_list_body(\@forklist, 'age', 0, 15,
6641                                       $#forklist <= 15 ? undef :
6642                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6643                                       'no_header');
6644         }
6645
6646         git_footer_html();
6647 }
6648
6649 sub git_tag {
6650         my %tag = parse_tag($hash);
6651
6652         if (! %tag) {
6653                 die_error(404, "Unknown tag object");
6654         }
6655
6656         my $head = git_get_head_hash($project);
6657         git_header_html();
6658         git_print_page_nav('','', $head,undef,$head);
6659         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6660         print "<div class=\"title_text\">\n" .
6661               "<table class=\"object_header\">\n" .
6662               "<tr>\n" .
6663               "<td>object</td>\n" .
6664               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6665                                $tag{'object'}) . "</td>\n" .
6666               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6667                                               $tag{'type'}) . "</td>\n" .
6668               "</tr>\n";
6669         if (defined($tag{'author'})) {
6670                 git_print_authorship_rows(\%tag, 'author');
6671         }
6672         print "</table>\n\n" .
6673               "</div>\n";
6674         print "<div class=\"page_body\">";
6675         my $comment = $tag{'comment'};
6676         foreach my $line (@$comment) {
6677                 chomp $line;
6678                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6679         }
6680         print "</div>\n";
6681         git_footer_html();
6682 }
6683
6684 sub git_blame_common {
6685         my $format = shift || 'porcelain';
6686         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6687                 $format = 'incremental';
6688                 $action = 'blame_incremental'; # for page title etc
6689         }
6690
6691         # permissions
6692         gitweb_check_feature('blame')
6693                 or die_error(403, "Blame view not allowed");
6694
6695         # error checking
6696         die_error(400, "No file name given") unless $file_name;
6697         $hash_base ||= git_get_head_hash($project);
6698         die_error(404, "Couldn't find base commit") unless $hash_base;
6699         my %co = parse_commit($hash_base)
6700                 or die_error(404, "Commit not found");
6701         my $ftype = "blob";
6702         if (!defined $hash) {
6703                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6704                         or die_error(404, "Error looking up file");
6705         } else {
6706                 $ftype = git_get_type($hash);
6707                 if ($ftype !~ "blob") {
6708                         die_error(400, "Object is not a blob");
6709                 }
6710         }
6711
6712         my $fd;
6713         if ($format eq 'incremental') {
6714                 # get file contents (as base)
6715                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6716                         or die_error(500, "Open git-cat-file failed");
6717         } elsif ($format eq 'data') {
6718                 # run git-blame --incremental
6719                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6720                         $hash_base, "--", $file_name
6721                         or die_error(500, "Open git-blame --incremental failed");
6722         } else {
6723                 # run git-blame --porcelain
6724                 open $fd, "-|", git_cmd(), "blame", '-p',
6725                         $hash_base, '--', $file_name
6726                         or die_error(500, "Open git-blame --porcelain failed");
6727         }
6728         binmode $fd, ':utf8';
6729
6730         # incremental blame data returns early
6731         if ($format eq 'data') {
6732                 print $cgi->header(
6733                         -type=>"text/plain", -charset => "utf-8",
6734                         -status=> "200 OK");
6735                 local $| = 1; # output autoflush
6736                 while (my $line = <$fd>) {
6737                         print to_utf8($line);
6738                 }
6739                 close $fd
6740                         or print "ERROR $!\n";
6741
6742                 print 'END';
6743                 if (defined $t0 && gitweb_check_feature('timed')) {
6744                         print ' '.
6745                               tv_interval($t0, [ gettimeofday() ]).
6746                               ' '.$number_of_git_cmds;
6747                 }
6748                 print "\n";
6749
6750                 return;
6751         }
6752
6753         # page header
6754         git_header_html();
6755         my $formats_nav =
6756                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6757                         "blob") .
6758                 " | ";
6759         if ($format eq 'incremental') {
6760                 $formats_nav .=
6761                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6762                                 "blame") . " (non-incremental)";
6763         } else {
6764                 $formats_nav .=
6765                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6766                                 "blame") . " (incremental)";
6767         }
6768         $formats_nav .=
6769                 " | " .
6770                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6771                         "history") .
6772                 " | " .
6773                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6774                         "HEAD");
6775         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6776         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6777         git_print_page_path($file_name, $ftype, $hash_base);
6778
6779         # page body
6780         if ($format eq 'incremental') {
6781                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6782                       "This page requires JavaScript to run.\n Use ".
6783                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6784                               'this page').
6785                       " instead.\n".
6786                       "</b></center></div>\n</noscript>\n";
6787
6788                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6789         }
6790
6791         print qq!<div class="page_body">\n!;
6792         print qq!<div id="progress_info">... / ...</div>\n!
6793                 if ($format eq 'incremental');
6794         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6795               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6796               qq!<thead>\n!.
6797               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6798               qq!</thead>\n!.
6799               qq!<tbody>\n!;
6800
6801         my @rev_color = qw(light dark);
6802         my $num_colors = scalar(@rev_color);
6803         my $current_color = 0;
6804
6805         if ($format eq 'incremental') {
6806                 my $color_class = $rev_color[$current_color];
6807
6808                 #contents of a file
6809                 my $linenr = 0;
6810         LINE:
6811                 while (my $line = <$fd>) {
6812                         chomp $line;
6813                         $linenr++;
6814
6815                         print qq!<tr id="l$linenr" class="$color_class">!.
6816                               qq!<td class="sha1"><a href=""> </a></td>!.
6817                               qq!<td class="linenr">!.
6818                               qq!<a class="linenr" href="">$linenr</a></td>!;
6819                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6820                         print qq!</tr>\n!;
6821                 }
6822
6823         } else { # porcelain, i.e. ordinary blame
6824                 my %metainfo = (); # saves information about commits
6825
6826                 # blame data
6827         LINE:
6828                 while (my $line = <$fd>) {
6829                         chomp $line;
6830                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6831                         # no <lines in group> for subsequent lines in group of lines
6832                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6833                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6834                         if (!exists $metainfo{$full_rev}) {
6835                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6836                         }
6837                         my $meta = $metainfo{$full_rev};
6838                         my $data;
6839                         while ($data = <$fd>) {
6840                                 chomp $data;
6841                                 last if ($data =~ s/^\t//); # contents of line
6842                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6843                                         $meta->{$1} = $2 unless exists $meta->{$1};
6844                                 }
6845                                 if ($data =~ /^previous /) {
6846                                         $meta->{'nprevious'}++;
6847                                 }
6848                         }
6849                         my $short_rev = substr($full_rev, 0, 8);
6850                         my $author = $meta->{'author'};
6851                         my %date =
6852                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6853                         my $date = $date{'iso-tz'};
6854                         if ($group_size) {
6855                                 $current_color = ($current_color + 1) % $num_colors;
6856                         }
6857                         my $tr_class = $rev_color[$current_color];
6858                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6859                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6860                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6861                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6862                         if ($group_size) {
6863                                 print "<td class=\"sha1\"";
6864                                 print " title=\"". esc_html($author) . ", $date\"";
6865                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6866                                 print ">";
6867                                 print $cgi->a({-href => href(action=>"commit",
6868                                                              hash=>$full_rev,
6869                                                              file_name=>$file_name)},
6870                                               esc_html($short_rev));
6871                                 if ($group_size >= 2) {
6872                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6873                                         if (@author_initials) {
6874                                                 print "<br />" .
6875                                                       esc_html(join('', @author_initials));
6876                                                 #           or join('.', ...)
6877                                         }
6878                                 }
6879                                 print "</td>\n";
6880                         }
6881                         # 'previous' <sha1 of parent commit> <filename at commit>
6882                         if (exists $meta->{'previous'} &&
6883                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6884                                 $meta->{'parent'} = $1;
6885                                 $meta->{'file_parent'} = unquote($2);
6886                         }
6887                         my $linenr_commit =
6888                                 exists($meta->{'parent'}) ?
6889                                 $meta->{'parent'} : $full_rev;
6890                         my $linenr_filename =
6891                                 exists($meta->{'file_parent'}) ?
6892                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6893                         my $blamed = href(action => 'blame',
6894                                           file_name => $linenr_filename,
6895                                           hash_base => $linenr_commit);
6896                         print "<td class=\"linenr\">";
6897                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6898                                         -class => "linenr" },
6899                                       esc_html($lineno));
6900                         print "</td>";
6901                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6902                         print "</tr>\n";
6903                 } # end while
6904
6905         }
6906
6907         # footer
6908         print "</tbody>\n".
6909               "</table>\n"; # class="blame"
6910         print "</div>\n";   # class="blame_body"
6911         close $fd
6912                 or print "Reading blob failed\n";
6913
6914         git_footer_html();
6915 }
6916
6917 sub git_blame {
6918         git_blame_common();
6919 }
6920
6921 sub git_blame_incremental {
6922         git_blame_common('incremental');
6923 }
6924
6925 sub git_blame_data {
6926         git_blame_common('data');
6927 }
6928
6929 sub git_tags {
6930         my $head = git_get_head_hash($project);
6931         git_header_html();
6932         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6933         git_print_header_div('summary', $project);
6934
6935         my @tagslist = git_get_tags_list();
6936         if (@tagslist) {
6937                 git_tags_body(\@tagslist);
6938         }
6939         git_footer_html();
6940 }
6941
6942 sub git_heads {
6943         my $head = git_get_head_hash($project);
6944         git_header_html();
6945         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6946         git_print_header_div('summary', $project);
6947
6948         my @headslist = git_get_heads_list();
6949         if (@headslist) {
6950                 git_heads_body(\@headslist, $head);
6951         }
6952         git_footer_html();
6953 }
6954
6955 # used both for single remote view and for list of all the remotes
6956 sub git_remotes {
6957         gitweb_check_feature('remote_heads')
6958                 or die_error(403, "Remote heads view is disabled");
6959
6960         my $head = git_get_head_hash($project);
6961         my $remote = $input_params{'hash'};
6962
6963         my $remotedata = git_get_remotes_list($remote);
6964         die_error(500, "Unable to get remote information") unless defined $remotedata;
6965
6966         unless (%$remotedata) {
6967                 die_error(404, defined $remote ?
6968                         "Remote $remote not found" :
6969                         "No remotes found");
6970         }
6971
6972         git_header_html(undef, undef, -action_extra => $remote);
6973         git_print_page_nav('', '',  $head, undef, $head,
6974                 format_ref_views($remote ? '' : 'remotes'));
6975
6976         fill_remote_heads($remotedata);
6977         if (defined $remote) {
6978                 git_print_header_div('remotes', "$remote remote for $project");
6979                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6980         } else {
6981                 git_print_header_div('summary', "$project remotes");
6982                 git_remotes_body($remotedata, undef, $head);
6983         }
6984
6985         git_footer_html();
6986 }
6987
6988 sub git_blob_plain {
6989         my $type = shift;
6990         my $expires;
6991
6992         if (!defined $hash) {
6993                 if (defined $file_name) {
6994                         my $base = $hash_base || git_get_head_hash($project);
6995                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6996                                 or die_error(404, "Cannot find file");
6997                 } else {
6998                         die_error(400, "No file name defined");
6999                 }
7000         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7001                 # blobs defined by non-textual hash id's can be cached
7002                 $expires = "+1d";
7003         }
7004
7005         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7006                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7007
7008         # content-type (can include charset)
7009         $type = blob_contenttype($fd, $file_name, $type);
7010
7011         # "save as" filename, even when no $file_name is given
7012         my $save_as = "$hash";
7013         if (defined $file_name) {
7014                 $save_as = $file_name;
7015         } elsif ($type =~ m/^text\//) {
7016                 $save_as .= '.txt';
7017         }
7018
7019         # With XSS prevention on, blobs of all types except a few known safe
7020         # ones are served with "Content-Disposition: attachment" to make sure
7021         # they don't run in our security domain.  For certain image types,
7022         # blob view writes an <img> tag referring to blob_plain view, and we
7023         # want to be sure not to break that by serving the image as an
7024         # attachment (though Firefox 3 doesn't seem to care).
7025         my $sandbox = $prevent_xss &&
7026                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7027
7028         # serve text/* as text/plain
7029         if ($prevent_xss &&
7030             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7031              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7032                 my $rest = $1;
7033                 $rest = defined $rest ? $rest : '';
7034                 $type = "text/plain$rest";
7035         }
7036
7037         print $cgi->header(
7038                 -type => $type,
7039                 -expires => $expires,
7040                 -content_disposition =>
7041                         ($sandbox ? 'attachment' : 'inline')
7042                         . '; filename="' . $save_as . '"');
7043         local $/ = undef;
7044         binmode STDOUT, ':raw';
7045         print <$fd>;
7046         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7047         close $fd;
7048 }
7049
7050 sub git_blob {
7051         my $expires;
7052
7053         if (!defined $hash) {
7054                 if (defined $file_name) {
7055                         my $base = $hash_base || git_get_head_hash($project);
7056                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7057                                 or die_error(404, "Cannot find file");
7058                 } else {
7059                         die_error(400, "No file name defined");
7060                 }
7061         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7062                 # blobs defined by non-textual hash id's can be cached
7063                 $expires = "+1d";
7064         }
7065
7066         my $have_blame = gitweb_check_feature('blame');
7067         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7068                 or die_error(500, "Couldn't cat $file_name, $hash");
7069         my $mimetype = blob_mimetype($fd, $file_name);
7070         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7071         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7072                 close $fd;
7073                 return git_blob_plain($mimetype);
7074         }
7075         # we can have blame only for text/* mimetype
7076         $have_blame &&= ($mimetype =~ m!^text/!);
7077
7078         my $highlight = gitweb_check_feature('highlight');
7079         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7080         $fd = run_highlighter($fd, $highlight, $syntax)
7081                 if $syntax;
7082
7083         git_header_html(undef, $expires);
7084         my $formats_nav = '';
7085         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7086                 if (defined $file_name) {
7087                         if ($have_blame) {
7088                                 $formats_nav .=
7089                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7090                                                 "blame") .
7091                                         " | ";
7092                         }
7093                         $formats_nav .=
7094                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7095                                         "history") .
7096                                 " | " .
7097                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7098                                         "raw") .
7099                                 " | " .
7100                                 $cgi->a({-href => href(action=>"blob",
7101                                                        hash_base=>"HEAD", file_name=>$file_name)},
7102                                         "HEAD");
7103                 } else {
7104                         $formats_nav .=
7105                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7106                                         "raw");
7107                 }
7108                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7109                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7110         } else {
7111                 print "<div class=\"page_nav\">\n" .
7112                       "<br/><br/></div>\n" .
7113                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7114         }
7115         git_print_page_path($file_name, "blob", $hash_base);
7116         print "<div class=\"page_body\">\n";
7117         if ($mimetype =~ m!^image/!) {
7118                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7119                 if ($file_name) {
7120                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7121                 }
7122                 print qq! src="! .
7123                       href(action=>"blob_plain", hash=>$hash,
7124                            hash_base=>$hash_base, file_name=>$file_name) .
7125                       qq!" />\n!;
7126         } else {
7127                 my $nr;
7128                 while (my $line = <$fd>) {
7129                         chomp $line;
7130                         $nr++;
7131                         $line = untabify($line);
7132                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7133                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7134                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7135                 }
7136         }
7137         close $fd
7138                 or print "Reading blob failed.\n";
7139         print "</div>";
7140         git_footer_html();
7141 }
7142
7143 sub git_tree {
7144         if (!defined $hash_base) {
7145                 $hash_base = "HEAD";
7146         }
7147         if (!defined $hash) {
7148                 if (defined $file_name) {
7149                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7150                 } else {
7151                         $hash = $hash_base;
7152                 }
7153         }
7154         die_error(404, "No such tree") unless defined($hash);
7155
7156         my $show_sizes = gitweb_check_feature('show-sizes');
7157         my $have_blame = gitweb_check_feature('blame');
7158
7159         my @entries = ();
7160         {
7161                 local $/ = "\0";
7162                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7163                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7164                         or die_error(500, "Open git-ls-tree failed");
7165                 @entries = map { chomp; $_ } <$fd>;
7166                 close $fd
7167                         or die_error(404, "Reading tree failed");
7168         }
7169
7170         my $refs = git_get_references();
7171         my $ref = format_ref_marker($refs, $hash_base);
7172         git_header_html();
7173         my $basedir = '';
7174         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7175                 my @views_nav = ();
7176                 if (defined $file_name) {
7177                         push @views_nav,
7178                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7179                                         "history"),
7180                                 $cgi->a({-href => href(action=>"tree",
7181                                                        hash_base=>"HEAD", file_name=>$file_name)},
7182                                         "HEAD"),
7183                 }
7184                 my $snapshot_links = format_snapshot_links($hash);
7185                 if (defined $snapshot_links) {
7186                         # FIXME: Should be available when we have no hash base as well.
7187                         push @views_nav, $snapshot_links;
7188                 }
7189                 git_print_page_nav('tree','', $hash_base, undef, undef,
7190                                    join(' | ', @views_nav));
7191                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7192         } else {
7193                 undef $hash_base;
7194                 print "<div class=\"page_nav\">\n";
7195                 print "<br/><br/></div>\n";
7196                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7197         }
7198         if (defined $file_name) {
7199                 $basedir = $file_name;
7200                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7201                         $basedir .= '/';
7202                 }
7203                 git_print_page_path($file_name, 'tree', $hash_base);
7204         }
7205         print "<div class=\"page_body\">\n";
7206         print "<table class=\"tree\">\n";
7207         my $alternate = 1;
7208         # '..' (top directory) link if possible
7209         if (defined $hash_base &&
7210             defined $file_name && $file_name =~ m![^/]+$!) {
7211                 if ($alternate) {
7212                         print "<tr class=\"dark\">\n";
7213                 } else {
7214                         print "<tr class=\"light\">\n";
7215                 }
7216                 $alternate ^= 1;
7217
7218                 my $up = $file_name;
7219                 $up =~ s!/?[^/]+$!!;
7220                 undef $up unless $up;
7221                 # based on git_print_tree_entry
7222                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7223                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7224                 print '<td class="list">';
7225                 print $cgi->a({-href => href(action=>"tree",
7226                                              hash_base=>$hash_base,
7227                                              file_name=>$up)},
7228                               "..");
7229                 print "</td>\n";
7230                 print "<td class=\"link\"></td>\n";
7231
7232                 print "</tr>\n";
7233         }
7234         foreach my $line (@entries) {
7235                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7236
7237                 if ($alternate) {
7238                         print "<tr class=\"dark\">\n";
7239                 } else {
7240                         print "<tr class=\"light\">\n";
7241                 }
7242                 $alternate ^= 1;
7243
7244                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7245
7246                 print "</tr>\n";
7247         }
7248         print "</table>\n" .
7249               "</div>";
7250         git_footer_html();
7251 }
7252
7253 sub sanitize_for_filename {
7254     my $name = shift;
7255
7256     $name =~ s!/!-!g;
7257     $name =~ s/[^[:alnum:]_.-]//g;
7258
7259     return $name;
7260 }
7261
7262 sub snapshot_name {
7263         my ($project, $hash) = @_;
7264
7265         # path/to/project.git  -> project
7266         # path/to/project/.git -> project
7267         my $name = to_utf8($project);
7268         $name =~ s,([^/])/*\.git$,$1,;
7269         $name = sanitize_for_filename(basename($name));
7270
7271         my $ver = $hash;
7272         if ($hash =~ /^[0-9a-fA-F]+$/) {
7273                 # shorten SHA-1 hash
7274                 my $full_hash = git_get_full_hash($project, $hash);
7275                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7276                         $ver = git_get_short_hash($project, $hash);
7277                 }
7278         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7279                 # tags don't need shortened SHA-1 hash
7280                 $ver = $1;
7281         } else {
7282                 # branches and other need shortened SHA-1 hash
7283                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7284                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7285                         my $ref_dir = (defined $1) ? $1 : '';
7286                         $ver = $2;
7287
7288                         $ref_dir = sanitize_for_filename($ref_dir);
7289                         # for refs neither in heads nor remotes we want to
7290                         # add a ref dir to archive name
7291                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7292                                 $ver = $ref_dir . '-' . $ver;
7293                         }
7294                 }
7295                 $ver .= '-' . git_get_short_hash($project, $hash);
7296         }
7297         # special case of sanitization for filename - we change
7298         # slashes to dots instead of dashes
7299         # in case of hierarchical branch names
7300         $ver =~ s!/!.!g;
7301         $ver =~ s/[^[:alnum:]_.-]//g;
7302
7303         # name = project-version_string
7304         $name = "$name-$ver";
7305
7306         return wantarray ? ($name, $name) : $name;
7307 }
7308
7309 sub exit_if_unmodified_since {
7310         my ($latest_epoch) = @_;
7311         our $cgi;
7312
7313         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7314         if (defined $if_modified) {
7315                 my $since;
7316                 if (eval { require HTTP::Date; 1; }) {
7317                         $since = HTTP::Date::str2time($if_modified);
7318                 } elsif (eval { require Time::ParseDate; 1; }) {
7319                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7320                 }
7321                 if (defined $since && $latest_epoch <= $since) {
7322                         my %latest_date = parse_date($latest_epoch);
7323                         print $cgi->header(
7324                                 -last_modified => $latest_date{'rfc2822'},
7325                                 -status => '304 Not Modified');
7326                         goto DONE_GITWEB;
7327                 }
7328         }
7329 }
7330
7331 sub git_snapshot {
7332         my $format = $input_params{'snapshot_format'};
7333         if (!@snapshot_fmts) {
7334                 die_error(403, "Snapshots not allowed");
7335         }
7336         # default to first supported snapshot format
7337         $format ||= $snapshot_fmts[0];
7338         if ($format !~ m/^[a-z0-9]+$/) {
7339                 die_error(400, "Invalid snapshot format parameter");
7340         } elsif (!exists($known_snapshot_formats{$format})) {
7341                 die_error(400, "Unknown snapshot format");
7342         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7343                 die_error(403, "Snapshot format not allowed");
7344         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7345                 die_error(403, "Unsupported snapshot format");
7346         }
7347
7348         my $type = git_get_type("$hash^{}");
7349         if (!$type) {
7350                 die_error(404, 'Object does not exist');
7351         }  elsif ($type eq 'blob') {
7352                 die_error(400, 'Object is not a tree-ish');
7353         }
7354
7355         my ($name, $prefix) = snapshot_name($project, $hash);
7356         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7357
7358         my %co = parse_commit($hash);
7359         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7360
7361         my $cmd = quote_command(
7362                 git_cmd(), 'archive',
7363                 "--format=$known_snapshot_formats{$format}{'format'}",
7364                 "--prefix=$prefix/", $hash);
7365         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7366                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7367         }
7368
7369         $filename =~ s/(["\\])/\\$1/g;
7370         my %latest_date;
7371         if (%co) {
7372                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7373         }
7374
7375         print $cgi->header(
7376                 -type => $known_snapshot_formats{$format}{'type'},
7377                 -content_disposition => 'inline; filename="' . $filename . '"',
7378                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7379                 -status => '200 OK');
7380
7381         open my $fd, "-|", $cmd
7382                 or die_error(500, "Execute git-archive failed");
7383         binmode STDOUT, ':raw';
7384         print <$fd>;
7385         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7386         close $fd;
7387 }
7388
7389 sub git_log_generic {
7390         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7391
7392         my $head = git_get_head_hash($project);
7393         if (!defined $base) {
7394                 $base = $head;
7395         }
7396         if (!defined $page) {
7397                 $page = 0;
7398         }
7399         my $refs = git_get_references();
7400
7401         my $commit_hash = $base;
7402         if (defined $parent) {
7403                 $commit_hash = "$parent..$base";
7404         }
7405         my @commitlist =
7406                 parse_commits($commit_hash, 101, (100 * $page),
7407                               defined $file_name ? ($file_name, "--full-history") : ());
7408
7409         my $ftype;
7410         if (!defined $file_hash && defined $file_name) {
7411                 # some commits could have deleted file in question,
7412                 # and not have it in tree, but one of them has to have it
7413                 for (my $i = 0; $i < @commitlist; $i++) {
7414                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7415                         last if defined $file_hash;
7416                 }
7417         }
7418         if (defined $file_hash) {
7419                 $ftype = git_get_type($file_hash);
7420         }
7421         if (defined $file_name && !defined $ftype) {
7422                 die_error(500, "Unknown type of object");
7423         }
7424         my %co;
7425         if (defined $file_name) {
7426                 %co = parse_commit($base)
7427                         or die_error(404, "Unknown commit object");
7428         }
7429
7430
7431         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7432         my $next_link = '';
7433         if ($#commitlist >= 100) {
7434                 $next_link =
7435                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7436                                  -accesskey => "n", -title => "Alt-n"}, "next");
7437         }
7438         my $patch_max = gitweb_get_feature('patches');
7439         if ($patch_max && !defined $file_name) {
7440                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7441                         $paging_nav .= " &sdot; " .
7442                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7443                                         "patches");
7444                 }
7445         }
7446
7447         git_header_html();
7448         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7449         if (defined $file_name) {
7450                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7451         } else {
7452                 git_print_header_div('summary', $project)
7453         }
7454         git_print_page_path($file_name, $ftype, $hash_base)
7455                 if (defined $file_name);
7456
7457         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7458                      $file_name, $file_hash, $ftype);
7459
7460         git_footer_html();
7461 }
7462
7463 sub git_log {
7464         git_log_generic('log', \&git_log_body,
7465                         $hash, $hash_parent);
7466 }
7467
7468 sub git_commit {
7469         $hash ||= $hash_base || "HEAD";
7470         my %co = parse_commit($hash)
7471             or die_error(404, "Unknown commit object");
7472
7473         my $parent  = $co{'parent'};
7474         my $parents = $co{'parents'}; # listref
7475
7476         # we need to prepare $formats_nav before any parameter munging
7477         my $formats_nav;
7478         if (!defined $parent) {
7479                 # --root commitdiff
7480                 $formats_nav .= '(initial)';
7481         } elsif (@$parents == 1) {
7482                 # single parent commit
7483                 $formats_nav .=
7484                         '(parent: ' .
7485                         $cgi->a({-href => href(action=>"commit",
7486                                                hash=>$parent)},
7487                                 esc_html(substr($parent, 0, 7))) .
7488                         ')';
7489         } else {
7490                 # merge commit
7491                 $formats_nav .=
7492                         '(merge: ' .
7493                         join(' ', map {
7494                                 $cgi->a({-href => href(action=>"commit",
7495                                                        hash=>$_)},
7496                                         esc_html(substr($_, 0, 7)));
7497                         } @$parents ) .
7498                         ')';
7499         }
7500         if (gitweb_check_feature('patches') && @$parents <= 1) {
7501                 $formats_nav .= " | " .
7502                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7503                                 "patch");
7504         }
7505
7506         if (!defined $parent) {
7507                 $parent = "--root";
7508         }
7509         my @difftree;
7510         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7511                 @diff_opts,
7512                 (@$parents <= 1 ? $parent : '-c'),
7513                 $hash, "--"
7514                 or die_error(500, "Open git-diff-tree failed");
7515         @difftree = map { chomp; $_ } <$fd>;
7516         close $fd or die_error(404, "Reading git-diff-tree failed");
7517
7518         # non-textual hash id's can be cached
7519         my $expires;
7520         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7521                 $expires = "+1d";
7522         }
7523         my $refs = git_get_references();
7524         my $ref = format_ref_marker($refs, $co{'id'});
7525
7526         git_header_html(undef, $expires);
7527         git_print_page_nav('commit', '',
7528                            $hash, $co{'tree'}, $hash,
7529                            $formats_nav);
7530
7531         if (defined $co{'parent'}) {
7532                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7533         } else {
7534                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7535         }
7536         print "<div class=\"title_text\">\n" .
7537               "<table class=\"object_header\">\n";
7538         git_print_authorship_rows(\%co);
7539         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7540         print "<tr>" .
7541               "<td>tree</td>" .
7542               "<td class=\"sha1\">" .
7543               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7544                        class => "list"}, $co{'tree'}) .
7545               "</td>" .
7546               "<td class=\"link\">" .
7547               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7548                       "tree");
7549         my $snapshot_links = format_snapshot_links($hash);
7550         if (defined $snapshot_links) {
7551                 print " | " . $snapshot_links;
7552         }
7553         print "</td>" .
7554               "</tr>\n";
7555
7556         foreach my $par (@$parents) {
7557                 print "<tr>" .
7558                       "<td>parent</td>" .
7559                       "<td class=\"sha1\">" .
7560                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7561                                class => "list"}, $par) .
7562                       "</td>" .
7563                       "<td class=\"link\">" .
7564                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7565                       " | " .
7566                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7567                       "</td>" .
7568                       "</tr>\n";
7569         }
7570         print "</table>".
7571               "</div>\n";
7572
7573         print "<div class=\"page_body\">\n";
7574         git_print_log($co{'comment'});
7575         print "</div>\n";
7576
7577         git_difftree_body(\@difftree, $hash, @$parents);
7578
7579         git_footer_html();
7580 }
7581
7582 sub git_object {
7583         # object is defined by:
7584         # - hash or hash_base alone
7585         # - hash_base and file_name
7586         my $type;
7587
7588         # - hash or hash_base alone
7589         if ($hash || ($hash_base && !defined $file_name)) {
7590                 my $object_id = $hash || $hash_base;
7591
7592                 open my $fd, "-|", quote_command(
7593                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7594                         or die_error(404, "Object does not exist");
7595                 $type = <$fd>;
7596                 chomp $type;
7597                 close $fd
7598                         or die_error(404, "Object does not exist");
7599
7600         # - hash_base and file_name
7601         } elsif ($hash_base && defined $file_name) {
7602                 $file_name =~ s,/+$,,;
7603
7604                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7605                         or die_error(404, "Base object does not exist");
7606
7607                 # here errors should not happen
7608                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7609                         or die_error(500, "Open git-ls-tree failed");
7610                 my $line = <$fd>;
7611                 close $fd;
7612
7613                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7614                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7615                         die_error(404, "File or directory for given base does not exist");
7616                 }
7617                 $type = $2;
7618                 $hash = $3;
7619         } else {
7620                 die_error(400, "Not enough information to find object");
7621         }
7622
7623         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7624                                           hash=>$hash, hash_base=>$hash_base,
7625                                           file_name=>$file_name),
7626                              -status => '302 Found');
7627 }
7628
7629 sub git_blobdiff {
7630         my $format = shift || 'html';
7631         my $diff_style = $input_params{'diff_style'} || 'inline';
7632
7633         my $fd;
7634         my @difftree;
7635         my %diffinfo;
7636         my $expires;
7637
7638         # preparing $fd and %diffinfo for git_patchset_body
7639         # new style URI
7640         if (defined $hash_base && defined $hash_parent_base) {
7641                 if (defined $file_name) {
7642                         # read raw output
7643                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7644                                 $hash_parent_base, $hash_base,
7645                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7646                                 or die_error(500, "Open git-diff-tree failed");
7647                         @difftree = map { chomp; $_ } <$fd>;
7648                         close $fd
7649                                 or die_error(404, "Reading git-diff-tree failed");
7650                         @difftree
7651                                 or die_error(404, "Blob diff not found");
7652
7653                 } elsif (defined $hash &&
7654                          $hash =~ /[0-9a-fA-F]{40}/) {
7655                         # try to find filename from $hash
7656
7657                         # read filtered raw output
7658                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7659                                 $hash_parent_base, $hash_base, "--"
7660                                 or die_error(500, "Open git-diff-tree failed");
7661                         @difftree =
7662                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7663                                 # $hash == to_id
7664                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7665                                 map { chomp; $_ } <$fd>;
7666                         close $fd
7667                                 or die_error(404, "Reading git-diff-tree failed");
7668                         @difftree
7669                                 or die_error(404, "Blob diff not found");
7670
7671                 } else {
7672                         die_error(400, "Missing one of the blob diff parameters");
7673                 }
7674
7675                 if (@difftree > 1) {
7676                         die_error(400, "Ambiguous blob diff specification");
7677                 }
7678
7679                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7680                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7681                 $file_name   ||= $diffinfo{'to_file'};
7682
7683                 $hash_parent ||= $diffinfo{'from_id'};
7684                 $hash        ||= $diffinfo{'to_id'};
7685
7686                 # non-textual hash id's can be cached
7687                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7688                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7689                         $expires = '+1d';
7690                 }
7691
7692                 # open patch output
7693                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7694                         '-p', ($format eq 'html' ? "--full-index" : ()),
7695                         $hash_parent_base, $hash_base,
7696                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7697                         or die_error(500, "Open git-diff-tree failed");
7698         }
7699
7700         # old/legacy style URI -- not generated anymore since 1.4.3.
7701         if (!%diffinfo) {
7702                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7703         }
7704
7705         # header
7706         if ($format eq 'html') {
7707                 my $formats_nav =
7708                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7709                                 "raw");
7710                 $formats_nav .= diff_style_nav($diff_style);
7711                 git_header_html(undef, $expires);
7712                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7713                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7714                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7715                 } else {
7716                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7717                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7718                 }
7719                 if (defined $file_name) {
7720                         git_print_page_path($file_name, "blob", $hash_base);
7721                 } else {
7722                         print "<div class=\"page_path\"></div>\n";
7723                 }
7724
7725         } elsif ($format eq 'plain') {
7726                 print $cgi->header(
7727                         -type => 'text/plain',
7728                         -charset => 'utf-8',
7729                         -expires => $expires,
7730                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7731
7732                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7733
7734         } else {
7735                 die_error(400, "Unknown blobdiff format");
7736         }
7737
7738         # patch
7739         if ($format eq 'html') {
7740                 print "<div class=\"page_body\">\n";
7741
7742                 git_patchset_body($fd, $diff_style,
7743                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7744                 close $fd;
7745
7746                 print "</div>\n"; # class="page_body"
7747                 git_footer_html();
7748
7749         } else {
7750                 while (my $line = <$fd>) {
7751                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7752                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7753
7754                         print $line;
7755
7756                         last if $line =~ m!^\+\+\+!;
7757                 }
7758                 local $/ = undef;
7759                 print <$fd>;
7760                 close $fd;
7761         }
7762 }
7763
7764 sub git_blobdiff_plain {
7765         git_blobdiff('plain');
7766 }
7767
7768 # assumes that it is added as later part of already existing navigation,
7769 # so it returns "| foo | bar" rather than just "foo | bar"
7770 sub diff_style_nav {
7771         my ($diff_style, $is_combined) = @_;
7772         $diff_style ||= 'inline';
7773
7774         return "" if ($is_combined);
7775
7776         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7777         my %styles = @styles;
7778         @styles =
7779                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7780
7781         return join '',
7782                 map { " | ".$_ }
7783                 map {
7784                         $_ eq $diff_style ? $styles{$_} :
7785                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7786                 } @styles;
7787 }
7788
7789 sub git_commitdiff {
7790         my %params = @_;
7791         my $format = $params{-format} || 'html';
7792         my $diff_style = $input_params{'diff_style'} || 'inline';
7793
7794         my ($patch_max) = gitweb_get_feature('patches');
7795         if ($format eq 'patch') {
7796                 die_error(403, "Patch view not allowed") unless $patch_max;
7797         }
7798
7799         $hash ||= $hash_base || "HEAD";
7800         my %co = parse_commit($hash)
7801             or die_error(404, "Unknown commit object");
7802
7803         # choose format for commitdiff for merge
7804         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7805                 $hash_parent = '--cc';
7806         }
7807         # we need to prepare $formats_nav before almost any parameter munging
7808         my $formats_nav;
7809         if ($format eq 'html') {
7810                 $formats_nav =
7811                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7812                                 "raw");
7813                 if ($patch_max && @{$co{'parents'}} <= 1) {
7814                         $formats_nav .= " | " .
7815                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7816                                         "patch");
7817                 }
7818                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7819
7820                 if (defined $hash_parent &&
7821                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7822                         # commitdiff with two commits given
7823                         my $hash_parent_short = $hash_parent;
7824                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7825                                 $hash_parent_short = substr($hash_parent, 0, 7);
7826                         }
7827                         $formats_nav .=
7828                                 ' (from';
7829                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7830                                 if ($co{'parents'}[$i] eq $hash_parent) {
7831                                         $formats_nav .= ' parent ' . ($i+1);
7832                                         last;
7833                                 }
7834                         }
7835                         $formats_nav .= ': ' .
7836                                 $cgi->a({-href => href(-replay=>1,
7837                                                        hash=>$hash_parent, hash_base=>undef)},
7838                                         esc_html($hash_parent_short)) .
7839                                 ')';
7840                 } elsif (!$co{'parent'}) {
7841                         # --root commitdiff
7842                         $formats_nav .= ' (initial)';
7843                 } elsif (scalar @{$co{'parents'}} == 1) {
7844                         # single parent commit
7845                         $formats_nav .=
7846                                 ' (parent: ' .
7847                                 $cgi->a({-href => href(-replay=>1,
7848                                                        hash=>$co{'parent'}, hash_base=>undef)},
7849                                         esc_html(substr($co{'parent'}, 0, 7))) .
7850                                 ')';
7851                 } else {
7852                         # merge commit
7853                         if ($hash_parent eq '--cc') {
7854                                 $formats_nav .= ' | ' .
7855                                         $cgi->a({-href => href(-replay=>1,
7856                                                                hash=>$hash, hash_parent=>'-c')},
7857                                                 'combined');
7858                         } else { # $hash_parent eq '-c'
7859                                 $formats_nav .= ' | ' .
7860                                         $cgi->a({-href => href(-replay=>1,
7861                                                                hash=>$hash, hash_parent=>'--cc')},
7862                                                 'compact');
7863                         }
7864                         $formats_nav .=
7865                                 ' (merge: ' .
7866                                 join(' ', map {
7867                                         $cgi->a({-href => href(-replay=>1,
7868                                                                hash=>$_, hash_base=>undef)},
7869                                                 esc_html(substr($_, 0, 7)));
7870                                 } @{$co{'parents'}} ) .
7871                                 ')';
7872                 }
7873         }
7874
7875         my $hash_parent_param = $hash_parent;
7876         if (!defined $hash_parent_param) {
7877                 # --cc for multiple parents, --root for parentless
7878                 $hash_parent_param =
7879                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7880         }
7881
7882         # read commitdiff
7883         my $fd;
7884         my @difftree;
7885         if ($format eq 'html') {
7886                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7887                         "--no-commit-id", "--patch-with-raw", "--full-index",
7888                         $hash_parent_param, $hash, "--"
7889                         or die_error(500, "Open git-diff-tree failed");
7890
7891                 while (my $line = <$fd>) {
7892                         chomp $line;
7893                         # empty line ends raw part of diff-tree output
7894                         last unless $line;
7895                         push @difftree, scalar parse_difftree_raw_line($line);
7896                 }
7897
7898         } elsif ($format eq 'plain') {
7899                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7900                         '-p', $hash_parent_param, $hash, "--"
7901                         or die_error(500, "Open git-diff-tree failed");
7902         } elsif ($format eq 'patch') {
7903                 # For commit ranges, we limit the output to the number of
7904                 # patches specified in the 'patches' feature.
7905                 # For single commits, we limit the output to a single patch,
7906                 # diverging from the git-format-patch default.
7907                 my @commit_spec = ();
7908                 if ($hash_parent) {
7909                         if ($patch_max > 0) {
7910                                 push @commit_spec, "-$patch_max";
7911                         }
7912                         push @commit_spec, '-n', "$hash_parent..$hash";
7913                 } else {
7914                         if ($params{-single}) {
7915                                 push @commit_spec, '-1';
7916                         } else {
7917                                 if ($patch_max > 0) {
7918                                         push @commit_spec, "-$patch_max";
7919                                 }
7920                                 push @commit_spec, "-n";
7921                         }
7922                         push @commit_spec, '--root', $hash;
7923                 }
7924                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7925                         '--encoding=utf8', '--stdout', @commit_spec
7926                         or die_error(500, "Open git-format-patch failed");
7927         } else {
7928                 die_error(400, "Unknown commitdiff format");
7929         }
7930
7931         # non-textual hash id's can be cached
7932         my $expires;
7933         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7934                 $expires = "+1d";
7935         }
7936
7937         # write commit message
7938         if ($format eq 'html') {
7939                 my $refs = git_get_references();
7940                 my $ref = format_ref_marker($refs, $co{'id'});
7941
7942                 git_header_html(undef, $expires);
7943                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7944                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7945                 print "<div class=\"title_text\">\n" .
7946                       "<table class=\"object_header\">\n";
7947                 git_print_authorship_rows(\%co);
7948                 print "</table>".
7949                       "</div>\n";
7950                 print "<div class=\"page_body\">\n";
7951                 if (@{$co{'comment'}} > 1) {
7952                         print "<div class=\"log\">\n";
7953                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7954                         print "</div>\n"; # class="log"
7955                 }
7956
7957         } elsif ($format eq 'plain') {
7958                 my $refs = git_get_references("tags");
7959                 my $tagname = git_get_rev_name_tags($hash);
7960                 my $filename = basename($project) . "-$hash.patch";
7961
7962                 print $cgi->header(
7963                         -type => 'text/plain',
7964                         -charset => 'utf-8',
7965                         -expires => $expires,
7966                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7967                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7968                 print "From: " . to_utf8($co{'author'}) . "\n";
7969                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7970                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7971
7972                 print "X-Git-Tag: $tagname\n" if $tagname;
7973                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7974
7975                 foreach my $line (@{$co{'comment'}}) {
7976                         print to_utf8($line) . "\n";
7977                 }
7978                 print "---\n\n";
7979         } elsif ($format eq 'patch') {
7980                 my $filename = basename($project) . "-$hash.patch";
7981
7982                 print $cgi->header(
7983                         -type => 'text/plain',
7984                         -charset => 'utf-8',
7985                         -expires => $expires,
7986                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7987         }
7988
7989         # write patch
7990         if ($format eq 'html') {
7991                 my $use_parents = !defined $hash_parent ||
7992                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7993                 git_difftree_body(\@difftree, $hash,
7994                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7995                 print "<br/>\n";
7996
7997                 git_patchset_body($fd, $diff_style,
7998                                   \@difftree, $hash,
7999                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8000                 close $fd;
8001                 print "</div>\n"; # class="page_body"
8002                 git_footer_html();
8003
8004         } elsif ($format eq 'plain') {
8005                 local $/ = undef;
8006                 print <$fd>;
8007                 close $fd
8008                         or print "Reading git-diff-tree failed\n";
8009         } elsif ($format eq 'patch') {
8010                 local $/ = undef;
8011                 print <$fd>;
8012                 close $fd
8013                         or print "Reading git-format-patch failed\n";
8014         }
8015 }
8016
8017 sub git_commitdiff_plain {
8018         git_commitdiff(-format => 'plain');
8019 }
8020
8021 # format-patch-style patches
8022 sub git_patch {
8023         git_commitdiff(-format => 'patch', -single => 1);
8024 }
8025
8026 sub git_patches {
8027         git_commitdiff(-format => 'patch');
8028 }
8029
8030 sub git_history {
8031         git_log_generic('history', \&git_history_body,
8032                         $hash_base, $hash_parent_base,
8033                         $file_name, $hash);
8034 }
8035
8036 sub git_search {
8037         $searchtype ||= 'commit';
8038
8039         # check if appropriate features are enabled
8040         gitweb_check_feature('search')
8041                 or die_error(403, "Search is disabled");
8042         if ($searchtype eq 'pickaxe') {
8043                 # pickaxe may take all resources of your box and run for several minutes
8044                 # with every query - so decide by yourself how public you make this feature
8045                 gitweb_check_feature('pickaxe')
8046                         or die_error(403, "Pickaxe search is disabled");
8047         }
8048         if ($searchtype eq 'grep') {
8049                 # grep search might be potentially CPU-intensive, too
8050                 gitweb_check_feature('grep')
8051                         or die_error(403, "Grep search is disabled");
8052         }
8053
8054         if (!defined $searchtext) {
8055                 die_error(400, "Text field is empty");
8056         }
8057         if (!defined $hash) {
8058                 $hash = git_get_head_hash($project);
8059         }
8060         my %co = parse_commit($hash);
8061         if (!%co) {
8062                 die_error(404, "Unknown commit object");
8063         }
8064         if (!defined $page) {
8065                 $page = 0;
8066         }
8067
8068         if ($searchtype eq 'commit' ||
8069             $searchtype eq 'author' ||
8070             $searchtype eq 'committer') {
8071                 git_search_message(%co);
8072         } elsif ($searchtype eq 'pickaxe') {
8073                 git_search_changes(%co);
8074         } elsif ($searchtype eq 'grep') {
8075                 git_search_files(%co);
8076         } else {
8077                 die_error(400, "Unknown search type");
8078         }
8079 }
8080
8081 sub git_search_help {
8082         git_header_html();
8083         git_print_page_nav('','', $hash,$hash,$hash);
8084         print <<EOT;
8085 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8086 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8087 the pattern entered is recognized as the POSIX extended
8088 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8089 insensitive).</p>
8090 <dl>
8091 <dt><b>commit</b></dt>
8092 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8093 EOT
8094         my $have_grep = gitweb_check_feature('grep');
8095         if ($have_grep) {
8096                 print <<EOT;
8097 <dt><b>grep</b></dt>
8098 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8099     a different one) are searched for the given pattern. On large trees, this search can take
8100 a while and put some strain on the server, so please use it with some consideration. Note that
8101 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8102 case-sensitive.</dd>
8103 EOT
8104         }
8105         print <<EOT;
8106 <dt><b>author</b></dt>
8107 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8108 <dt><b>committer</b></dt>
8109 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8110 EOT
8111         my $have_pickaxe = gitweb_check_feature('pickaxe');
8112         if ($have_pickaxe) {
8113                 print <<EOT;
8114 <dt><b>pickaxe</b></dt>
8115 <dd>All commits that caused the string to appear or disappear from any file (changes that
8116 added, removed or "modified" the string) will be listed. This search can take a while and
8117 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8118 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8119 EOT
8120         }
8121         print "</dl>\n";
8122         git_footer_html();
8123 }
8124
8125 sub git_shortlog {
8126         git_log_generic('shortlog', \&git_shortlog_body,
8127                         $hash, $hash_parent);
8128 }
8129
8130 ## ......................................................................
8131 ## feeds (RSS, Atom; OPML)
8132
8133 sub git_feed {
8134         my $format = shift || 'atom';
8135         my $have_blame = gitweb_check_feature('blame');
8136
8137         # Atom: http://www.atomenabled.org/developers/syndication/
8138         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8139         if ($format ne 'rss' && $format ne 'atom') {
8140                 die_error(400, "Unknown web feed format");
8141         }
8142
8143         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8144         my $head = $hash || 'HEAD';
8145         my @commitlist = parse_commits($head, 150, 0, $file_name);
8146
8147         my %latest_commit;
8148         my %latest_date;
8149         my $content_type = "application/$format+xml";
8150         if (defined $cgi->http('HTTP_ACCEPT') &&
8151                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8152                 # browser (feed reader) prefers text/xml
8153                 $content_type = 'text/xml';
8154         }
8155         if (defined($commitlist[0])) {
8156                 %latest_commit = %{$commitlist[0]};
8157                 my $latest_epoch = $latest_commit{'committer_epoch'};
8158                 exit_if_unmodified_since($latest_epoch);
8159                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8160         }
8161         print $cgi->header(
8162                 -type => $content_type,
8163                 -charset => 'utf-8',
8164                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8165                 -status => '200 OK');
8166
8167         # Optimization: skip generating the body if client asks only
8168         # for Last-Modified date.
8169         return if ($cgi->request_method() eq 'HEAD');
8170
8171         # header variables
8172         my $title = "$site_name - $project/$action";
8173         my $feed_type = 'log';
8174         if (defined $hash) {
8175                 $title .= " - '$hash'";
8176                 $feed_type = 'branch log';
8177                 if (defined $file_name) {
8178                         $title .= " :: $file_name";
8179                         $feed_type = 'history';
8180                 }
8181         } elsif (defined $file_name) {
8182                 $title .= " - $file_name";
8183                 $feed_type = 'history';
8184         }
8185         $title .= " $feed_type";
8186         $title = esc_html($title);
8187         my $descr = git_get_project_description($project);
8188         if (defined $descr) {
8189                 $descr = esc_html($descr);
8190         } else {
8191                 $descr = "$project " .
8192                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8193                          " feed";
8194         }
8195         my $owner = git_get_project_owner($project);
8196         $owner = esc_html($owner);
8197
8198         #header
8199         my $alt_url;
8200         if (defined $file_name) {
8201                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8202         } elsif (defined $hash) {
8203                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8204         } else {
8205                 $alt_url = href(-full=>1, action=>"summary");
8206         }
8207         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8208         if ($format eq 'rss') {
8209                 print <<XML;
8210 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8211 <channel>
8212 XML
8213                 print "<title>$title</title>\n" .
8214                       "<link>$alt_url</link>\n" .
8215                       "<description>$descr</description>\n" .
8216                       "<language>en</language>\n" .
8217                       # project owner is responsible for 'editorial' content
8218                       "<managingEditor>$owner</managingEditor>\n";
8219                 if (defined $logo || defined $favicon) {
8220                         # prefer the logo to the favicon, since RSS
8221                         # doesn't allow both
8222                         my $img = esc_url($logo || $favicon);
8223                         print "<image>\n" .
8224                               "<url>$img</url>\n" .
8225                               "<title>$title</title>\n" .
8226                               "<link>$alt_url</link>\n" .
8227                               "</image>\n";
8228                 }
8229                 if (%latest_date) {
8230                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8231                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8232                 }
8233                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8234         } elsif ($format eq 'atom') {
8235                 print <<XML;
8236 <feed xmlns="http://www.w3.org/2005/Atom">
8237 XML
8238                 print "<title>$title</title>\n" .
8239                       "<subtitle>$descr</subtitle>\n" .
8240                       '<link rel="alternate" type="text/html" href="' .
8241                       $alt_url . '" />' . "\n" .
8242                       '<link rel="self" type="' . $content_type . '" href="' .
8243                       $cgi->self_url() . '" />' . "\n" .
8244                       "<id>" . href(-full=>1) . "</id>\n" .
8245                       # use project owner for feed author
8246                       "<author><name>$owner</name></author>\n";
8247                 if (defined $favicon) {
8248                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8249                 }
8250                 if (defined $logo) {
8251                         # not twice as wide as tall: 72 x 27 pixels
8252                         print "<logo>" . esc_url($logo) . "</logo>\n";
8253                 }
8254                 if (! %latest_date) {
8255                         # dummy date to keep the feed valid until commits trickle in:
8256                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8257                 } else {
8258                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8259                 }
8260                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8261         }
8262
8263         # contents
8264         for (my $i = 0; $i <= $#commitlist; $i++) {
8265                 my %co = %{$commitlist[$i]};
8266                 my $commit = $co{'id'};
8267                 # we read 150, we always show 30 and the ones more recent than 48 hours
8268                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8269                         last;
8270                 }
8271                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8272
8273                 # get list of changed files
8274                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8275                         $co{'parent'} || "--root",
8276                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8277                         or next;
8278                 my @difftree = map { chomp; $_ } <$fd>;
8279                 close $fd
8280                         or next;
8281
8282                 # print element (entry, item)
8283                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8284                 if ($format eq 'rss') {
8285                         print "<item>\n" .
8286                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8287                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8288                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8289                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8290                               "<link>$co_url</link>\n" .
8291                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8292                               "<content:encoded>" .
8293                               "<![CDATA[\n";
8294                 } elsif ($format eq 'atom') {
8295                         print "<entry>\n" .
8296                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8297                               "<updated>$cd{'iso-8601'}</updated>\n" .
8298                               "<author>\n" .
8299                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8300                         if ($co{'author_email'}) {
8301                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8302                         }
8303                         print "</author>\n" .
8304                               # use committer for contributor
8305                               "<contributor>\n" .
8306                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8307                         if ($co{'committer_email'}) {
8308                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8309                         }
8310                         print "</contributor>\n" .
8311                               "<published>$cd{'iso-8601'}</published>\n" .
8312                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8313                               "<id>$co_url</id>\n" .
8314                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8315                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8316                 }
8317                 my $comment = $co{'comment'};
8318                 print "<pre>\n";
8319                 foreach my $line (@$comment) {
8320                         $line = esc_html($line);
8321                         print "$line\n";
8322                 }
8323                 print "</pre><ul>\n";
8324                 foreach my $difftree_line (@difftree) {
8325                         my %difftree = parse_difftree_raw_line($difftree_line);
8326                         next if !$difftree{'from_id'};
8327
8328                         my $file = $difftree{'file'} || $difftree{'to_file'};
8329
8330                         print "<li>" .
8331                               "[" .
8332                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8333                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8334                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8335                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8336                                       -title => "diff"}, 'D');
8337                         if ($have_blame) {
8338                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8339                                                              file_name=>$file, hash_base=>$commit),
8340                                               -title => "blame"}, 'B');
8341                         }
8342                         # if this is not a feed of a file history
8343                         if (!defined $file_name || $file_name ne $file) {
8344                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8345                                                              file_name=>$file, hash=>$commit),
8346                                               -title => "history"}, 'H');
8347                         }
8348                         $file = esc_path($file);
8349                         print "] ".
8350                               "$file</li>\n";
8351                 }
8352                 if ($format eq 'rss') {
8353                         print "</ul>]]>\n" .
8354                               "</content:encoded>\n" .
8355                               "</item>\n";
8356                 } elsif ($format eq 'atom') {
8357                         print "</ul>\n</div>\n" .
8358                               "</content>\n" .
8359                               "</entry>\n";
8360                 }
8361         }
8362
8363         # end of feed
8364         if ($format eq 'rss') {
8365                 print "</channel>\n</rss>\n";
8366         } elsif ($format eq 'atom') {
8367                 print "</feed>\n";
8368         }
8369 }
8370
8371 sub git_rss {
8372         git_feed('rss');
8373 }
8374
8375 sub git_atom {
8376         git_feed('atom');
8377 }
8378
8379 sub git_opml {
8380         my @list = git_get_projects_list($project_filter, $strict_export);
8381         if (!@list) {
8382                 die_error(404, "No projects found");
8383         }
8384
8385         print $cgi->header(
8386                 -type => 'text/xml',
8387                 -charset => 'utf-8',
8388                 -content_disposition => 'inline; filename="opml.xml"');
8389
8390         my $title = esc_html($site_name);
8391         my $filter = " within subdirectory ";
8392         if (defined $project_filter) {
8393                 $filter .= esc_html($project_filter);
8394         } else {
8395                 $filter = "";
8396         }
8397         print <<XML;
8398 <?xml version="1.0" encoding="utf-8"?>
8399 <opml version="1.0">
8400 <head>
8401   <title>$title OPML Export$filter</title>
8402 </head>
8403 <body>
8404 <outline text="git RSS feeds">
8405 XML
8406
8407         foreach my $pr (@list) {
8408                 my %proj = %$pr;
8409                 my $head = git_get_head_hash($proj{'path'});
8410                 if (!defined $head) {
8411                         next;
8412                 }
8413                 $git_dir = "$projectroot/$proj{'path'}";
8414                 my %co = parse_commit($head);
8415                 if (!%co) {
8416                         next;
8417                 }
8418
8419                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8420                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8421                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8422                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8423         }
8424         print <<XML;
8425 </outline>
8426 </body>
8427 </opml>
8428 XML
8429 }