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 = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         # this must be last entry (for manipulation from JavaScript)
 763         javascript => "js"
 764 );
 765 our %cgi_param_mapping = @cgi_param_mapping;
 766
 767 # we will also need to know the possible actions, for validation
 768 our %actions = (
 769         "blame" => \&git_blame,
 770         "blame_incremental" => \&git_blame_incremental,
 771         "blame_data" => \&git_blame_data,
 772         "blobdiff" => \&git_blobdiff,
 773         "blobdiff_plain" => \&git_blobdiff_plain,
 774         "blob" => \&git_blob,
 775         "blob_plain" => \&git_blob_plain,
 776         "commitdiff" => \&git_commitdiff,
 777         "commitdiff_plain" => \&git_commitdiff_plain,
 778         "commit" => \&git_commit,
 779         "forks" => \&git_forks,
 780         "heads" => \&git_heads,
 781         "history" => \&git_history,
 782         "log" => \&git_log,
 783         "patch" => \&git_patch,
 784         "patches" => \&git_patches,
 785         "remotes" => \&git_remotes,
 786         "rss" => \&git_rss,
 787         "atom" => \&git_atom,
 788         "search" => \&git_search,
 789         "search_help" => \&git_search_help,
 790         "shortlog" => \&git_shortlog,
 791         "summary" => \&git_summary,
 792         "tag" => \&git_tag,
 793         "tags" => \&git_tags,
 794         "tree" => \&git_tree,
 795         "snapshot" => \&git_snapshot,
 796         "object" => \&git_object,
 797         # those below don't need $project
 798         "opml" => \&git_opml,
 799         "project_list" => \&git_project_list,
 800         "project_index" => \&git_project_index,
 801 );
 802
 803 # finally, we have the hash of allowed extra_options for the commands that
 804 # allow them
 805 our %allowed_options = (
 806         "--no-merges" => [ qw(rss atom log shortlog history) ],
 807 );
 808
 809 # fill %input_params with the CGI parameters. All values except for 'opt'
 810 # should be single values, but opt can be an array. We should probably
 811 # build an array of parameters that can be multi-valued, but since for the time
 812 # being it's only this one, we just single it out
 813 sub evaluate_query_params {
 814         our $cgi;
 815
 816         while (my ($name, $symbol) = each %cgi_param_mapping) {
 817                 if ($symbol eq 'opt') {
 818                         $input_params{$name} = [ $cgi->param($symbol) ];
 819                 } else {
 820                         $input_params{$name} = $cgi->param($symbol);
 821                 }
 822         }
 823 }
 824
 825 # now read PATH_INFO and update the parameter list for missing parameters
 826 sub evaluate_path_info {
 827         return if defined $input_params{'project'};
 828         return if !$path_info;
 829         $path_info =~ s,^/+,,;
 830         return if !$path_info;
 831
 832         # find which part of PATH_INFO is project
 833         my $project = $path_info;
 834         $project =~ s,/+$,,;
 835         while ($project && !check_head_link("$projectroot/$project")) {
 836                 $project =~ s,/*[^/]*$,,;
 837         }
 838         return unless $project;
 839         $input_params{'project'} = $project;
 840
 841         # do not change any parameters if an action is given using the query string
 842         return if $input_params{'action'};
 843         $path_info =~ s,^\Q$project\E/*,,;
 844
 845         # next, check if we have an action
 846         my $action = $path_info;
 847         $action =~ s,/.*$,,;
 848         if (exists $actions{$action}) {
 849                 $path_info =~ s,^$action/*,,;
 850                 $input_params{'action'} = $action;
 851         }
 852
 853         # list of actions that want hash_base instead of hash, but can have no
 854         # pathname (f) parameter
 855         my @wants_base = (
 856                 'tree',
 857                 'history',
 858         );
 859
 860         # we want to catch, among others
 861         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 862         my ($parentrefname, $parentpathname, $refname, $pathname) =
 863                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 864
 865         # first, analyze the 'current' part
 866         if (defined $pathname) {
 867                 # we got "branch:filename" or "branch:dir/"
 868                 # we could use git_get_type(branch:pathname), but:
 869                 # - it needs $git_dir
 870                 # - it does a git() call
 871                 # - the convention of terminating directories with a slash
 872                 #   makes it superfluous
 873                 # - embedding the action in the PATH_INFO would make it even
 874                 #   more superfluous
 875                 $pathname =~ s,^/+,,;
 876                 if (!$pathname || substr($pathname, -1) eq "/") {
 877                         $input_params{'action'} ||= "tree";
 878                         $pathname =~ s,/$,,;
 879                 } else {
 880                         # the default action depends on whether we had parent info
 881                         # or not
 882                         if ($parentrefname) {
 883                                 $input_params{'action'} ||= "blobdiff_plain";
 884                         } else {
 885                                 $input_params{'action'} ||= "blob_plain";
 886                         }
 887                 }
 888                 $input_params{'hash_base'} ||= $refname;
 889                 $input_params{'file_name'} ||= $pathname;
 890         } elsif (defined $refname) {
 891                 # we got "branch". In this case we have to choose if we have to
 892                 # set hash or hash_base.
 893                 #
 894                 # Most of the actions without a pathname only want hash to be
 895                 # set, except for the ones specified in @wants_base that want
 896                 # hash_base instead. It should also be noted that hand-crafted
 897                 # links having 'history' as an action and no pathname or hash
 898                 # set will fail, but that happens regardless of PATH_INFO.
 899                 if (defined $parentrefname) {
 900                         # if there is parent let the default be 'shortlog' action
 901                         # (for http://git.example.com/repo.git/A..B links); if there
 902                         # is no parent, dispatch will detect type of object and set
 903                         # action appropriately if required (if action is not set)
 904                         $input_params{'action'} ||= "shortlog";
 905                 }
 906                 if ($input_params{'action'} &&
 907                     grep { $_ eq $input_params{'action'} } @wants_base) {
 908                         $input_params{'hash_base'} ||= $refname;
 909                 } else {
 910                         $input_params{'hash'} ||= $refname;
 911                 }
 912         }
 913
 914         # next, handle the 'parent' part, if present
 915         if (defined $parentrefname) {
 916                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 917                 # someproject/blobdiff/oldrev..newrev:/filename
 918                 if ($parentpathname) {
 919                         $parentpathname =~ s,^/+,,;
 920                         $parentpathname =~ s,/$,,;
 921                         $input_params{'file_parent'} ||= $parentpathname;
 922                 } else {
 923                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 924                 }
 925                 # we assume that hash_parent_base is wanted if a path was specified,
 926                 # or if the action wants hash_base instead of hash
 927                 if (defined $input_params{'file_parent'} ||
 928                         grep { $_ eq $input_params{'action'} } @wants_base) {
 929                         $input_params{'hash_parent_base'} ||= $parentrefname;
 930                 } else {
 931                         $input_params{'hash_parent'} ||= $parentrefname;
 932                 }
 933         }
 934
 935         # for the snapshot action, we allow URLs in the form
 936         # $project/snapshot/$hash.ext
 937         # where .ext determines the snapshot and gets removed from the
 938         # passed $refname to provide the $hash.
 939         #
 940         # To be able to tell that $refname includes the format extension, we
 941         # require the following two conditions to be satisfied:
 942         # - the hash input parameter MUST have been set from the $refname part
 943         #   of the URL (i.e. they must be equal)
 944         # - the snapshot format MUST NOT have been defined already (e.g. from
 945         #   CGI parameter sf)
 946         # It's also useless to try any matching unless $refname has a dot,
 947         # so we check for that too
 948         if (defined $input_params{'action'} &&
 949                 $input_params{'action'} eq 'snapshot' &&
 950                 defined $refname && index($refname, '.') != -1 &&
 951                 $refname eq $input_params{'hash'} &&
 952                 !defined $input_params{'snapshot_format'}) {
 953                 # We loop over the known snapshot formats, checking for
 954                 # extensions. Allowed extensions are both the defined suffix
 955                 # (which includes the initial dot already) and the snapshot
 956                 # format key itself, with a prepended dot
 957                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 958                         my $hash = $refname;
 959                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 960                                 next;
 961                         }
 962                         my $sfx = $1;
 963                         # a valid suffix was found, so set the snapshot format
 964                         # and reset the hash parameter
 965                         $input_params{'snapshot_format'} = $fmt;
 966                         $input_params{'hash'} = $hash;
 967                         # we also set the format suffix to the one requested
 968                         # in the URL: this way a request for e.g. .tgz returns
 969                         # a .tgz instead of a .tar.gz
 970                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 971                         last;
 972                 }
 973         }
 974 }
 975
 976 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 977      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 978      $searchtext, $search_regexp);
 979 sub evaluate_and_validate_params {
 980         our $action = $input_params{'action'};
 981         if (defined $action) {
 982                 if (!validate_action($action)) {
 983                         die_error(400, "Invalid action parameter");
 984                 }
 985         }
 986
 987         # parameters which are pathnames
 988         our $project = $input_params{'project'};
 989         if (defined $project) {
 990                 if (!validate_project($project)) {
 991                         undef $project;
 992                         die_error(404, "No such project");
 993                 }
 994         }
 995
 996         our $file_name = $input_params{'file_name'};
 997         if (defined $file_name) {
 998                 if (!validate_pathname($file_name)) {
 999                         die_error(400, "Invalid file parameter");
1000                 }
1001         }
1002
1003         our $file_parent = $input_params{'file_parent'};
1004         if (defined $file_parent) {
1005                 if (!validate_pathname($file_parent)) {
1006                         die_error(400, "Invalid file parent parameter");
1007                 }
1008         }
1009
1010         # parameters which are refnames
1011         our $hash = $input_params{'hash'};
1012         if (defined $hash) {
1013                 if (!validate_refname($hash)) {
1014                         die_error(400, "Invalid hash parameter");
1015                 }
1016         }
1017
1018         our $hash_parent = $input_params{'hash_parent'};
1019         if (defined $hash_parent) {
1020                 if (!validate_refname($hash_parent)) {
1021                         die_error(400, "Invalid hash parent parameter");
1022                 }
1023         }
1024
1025         our $hash_base = $input_params{'hash_base'};
1026         if (defined $hash_base) {
1027                 if (!validate_refname($hash_base)) {
1028                         die_error(400, "Invalid hash base parameter");
1029                 }
1030         }
1031
1032         our @extra_options = @{$input_params{'extra_options'}};
1033         # @extra_options is always defined, since it can only be (currently) set from
1034         # CGI, and $cgi->param() returns the empty array in array context if the param
1035         # is not set
1036         foreach my $opt (@extra_options) {
1037                 if (not exists $allowed_options{$opt}) {
1038                         die_error(400, "Invalid option parameter");
1039                 }
1040                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1041                         die_error(400, "Invalid option parameter for this action");
1042                 }
1043         }
1044
1045         our $hash_parent_base = $input_params{'hash_parent_base'};
1046         if (defined $hash_parent_base) {
1047                 if (!validate_refname($hash_parent_base)) {
1048                         die_error(400, "Invalid hash parent base parameter");
1049                 }
1050         }
1051
1052         # other parameters
1053         our $page = $input_params{'page'};
1054         if (defined $page) {
1055                 if ($page =~ m/[^0-9]/) {
1056                         die_error(400, "Invalid page parameter");
1057                 }
1058         }
1059
1060         our $searchtype = $input_params{'searchtype'};
1061         if (defined $searchtype) {
1062                 if ($searchtype =~ m/[^a-z]/) {
1063                         die_error(400, "Invalid searchtype parameter");
1064                 }
1065         }
1066
1067         our $search_use_regexp = $input_params{'search_use_regexp'};
1068
1069         our $searchtext = $input_params{'searchtext'};
1070         our $search_regexp;
1071         if (defined $searchtext) {
1072                 if (length($searchtext) < 2) {
1073                         die_error(403, "At least two characters are required for search parameter");
1074                 }
1075                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1076         }
1077 }
1078
1079 # path to the current git repository
1080 our $git_dir;
1081 sub evaluate_git_dir {
1082         our $git_dir = "$projectroot/$project" if $project;
1083 }
1084
1085 our (@snapshot_fmts, $git_avatar);
1086 sub configure_gitweb_features {
1087         # list of supported snapshot formats
1088         our @snapshot_fmts = gitweb_get_feature('snapshot');
1089         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1090
1091         # check that the avatar feature is set to a known provider name,
1092         # and for each provider check if the dependencies are satisfied.
1093         # if the provider name is invalid or the dependencies are not met,
1094         # reset $git_avatar to the empty string.
1095         our ($git_avatar) = gitweb_get_feature('avatar');
1096         if ($git_avatar eq 'gravatar') {
1097                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1098         } elsif ($git_avatar eq 'picon') {
1099                 # no dependencies
1100         } else {
1101                 $git_avatar = '';
1102         }
1103 }
1104
1105 # custom error handler: 'die <message>' is Internal Server Error
1106 sub handle_errors_html {
1107         my $msg = shift; # it is already HTML escaped
1108
1109         # to avoid infinite loop where error occurs in die_error,
1110         # change handler to default handler, disabling handle_errors_html
1111         set_message("Error occured when inside die_error:\n$msg");
1112
1113         # you cannot jump out of die_error when called as error handler;
1114         # the subroutine set via CGI::Carp::set_message is called _after_
1115         # HTTP headers are already written, so it cannot write them itself
1116         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1117 }
1118 set_message(\&handle_errors_html);
1119
1120 # dispatch
1121 sub dispatch {
1122         if (!defined $action) {
1123                 if (defined $hash) {
1124                         $action = git_get_type($hash);
1125                 } elsif (defined $hash_base && defined $file_name) {
1126                         $action = git_get_type("$hash_base:$file_name");
1127                 } elsif (defined $project) {
1128                         $action = 'summary';
1129                 } else {
1130                         $action = 'project_list';
1131                 }
1132         }
1133         if (!defined($actions{$action})) {
1134                 die_error(400, "Unknown action");
1135         }
1136         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1137             !$project) {
1138                 die_error(400, "Project needed");
1139         }
1140         $actions{$action}->();
1141 }
1142
1143 sub reset_timer {
1144         our $t0 = [ gettimeofday() ]
1145                 if defined $t0;
1146         our $number_of_git_cmds = 0;
1147 }
1148
1149 our $first_request = 1;
1150 sub run_request {
1151         reset_timer();
1152
1153         evaluate_uri();
1154         if ($first_request) {
1155                 evaluate_gitweb_config();
1156                 evaluate_git_version();
1157         }
1158         if ($per_request_config) {
1159                 if (ref($per_request_config) eq 'CODE') {
1160                         $per_request_config->();
1161                 } elsif (!$first_request) {
1162                         evaluate_gitweb_config();
1163                 }
1164         }
1165         check_loadavg();
1166
1167         # $projectroot and $projects_list might be set in gitweb config file
1168         $projects_list ||= $projectroot;
1169
1170         evaluate_query_params();
1171         evaluate_path_info();
1172         evaluate_and_validate_params();
1173         evaluate_git_dir();
1174
1175         configure_gitweb_features();
1176
1177         dispatch();
1178 }
1179
1180 our $is_last_request = sub { 1 };
1181 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1182 our $CGI = 'CGI';
1183 our $cgi;
1184 sub configure_as_fcgi {
1185         require CGI::Fast;
1186         our $CGI = 'CGI::Fast';
1187
1188         my $request_number = 0;
1189         # let each child service 100 requests
1190         our $is_last_request = sub { ++$request_number > 100 };
1191 }
1192 sub evaluate_argv {
1193         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1194         configure_as_fcgi()
1195                 if $script_name =~ /\.fcgi$/;
1196
1197         return unless (@ARGV);
1198
1199         require Getopt::Long;
1200         Getopt::Long::GetOptions(
1201                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1202                 'nproc|n=i' => sub {
1203                         my ($arg, $val) = @_;
1204                         return unless eval { require FCGI::ProcManager; 1; };
1205                         my $proc_manager = FCGI::ProcManager->new({
1206                                 n_processes => $val,
1207                         });
1208                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1209                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1210                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1211                 },
1212         );
1213 }
1214
1215 sub run {
1216         evaluate_argv();
1217
1218         $first_request = 1;
1219         $pre_listen_hook->()
1220                 if $pre_listen_hook;
1221
1222  REQUEST:
1223         while ($cgi = $CGI->new()) {
1224                 $pre_dispatch_hook->()
1225                         if $pre_dispatch_hook;
1226
1227                 run_request();
1228
1229                 $post_dispatch_hook->()
1230                         if $post_dispatch_hook;
1231                 $first_request = 0;
1232
1233                 last REQUEST if ($is_last_request->());
1234         }
1235
1236  DONE_GITWEB:
1237         1;
1238 }
1239
1240 run();
1241
1242 if (defined caller) {
1243         # wrapped in a subroutine processing requests,
1244         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1245         return;
1246 } else {
1247         # pure CGI script, serving single request
1248         exit;
1249 }
1250
1251 ## ======================================================================
1252 ## action links
1253
1254 # possible values of extra options
1255 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1256 # -replay => 1      - start from a current view (replay with modifications)
1257 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1258 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1259 sub href {
1260         my %params = @_;
1261         # default is to use -absolute url() i.e. $my_uri
1262         my $href = $params{-full} ? $my_url : $my_uri;
1263
1264         # implicit -replay, must be first of implicit params
1265         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1266
1267         $params{'project'} = $project unless exists $params{'project'};
1268
1269         if ($params{-replay}) {
1270                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1271                         if (!exists $params{$name}) {
1272                                 $params{$name} = $input_params{$name};
1273                         }
1274                 }
1275         }
1276
1277         my $use_pathinfo = gitweb_check_feature('pathinfo');
1278         if (defined $params{'project'} &&
1279             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1280                 # try to put as many parameters as possible in PATH_INFO:
1281                 #   - project name
1282                 #   - action
1283                 #   - hash_parent or hash_parent_base:/file_parent
1284                 #   - hash or hash_base:/filename
1285                 #   - the snapshot_format as an appropriate suffix
1286
1287                 # When the script is the root DirectoryIndex for the domain,
1288                 # $href here would be something like http://gitweb.example.com/
1289                 # Thus, we strip any trailing / from $href, to spare us double
1290                 # slashes in the final URL
1291                 $href =~ s,/$,,;
1292
1293                 # Then add the project name, if present
1294                 $href .= "/".esc_path_info($params{'project'});
1295                 delete $params{'project'};
1296
1297                 # since we destructively absorb parameters, we keep this
1298                 # boolean that remembers if we're handling a snapshot
1299                 my $is_snapshot = $params{'action'} eq 'snapshot';
1300
1301                 # Summary just uses the project path URL, any other action is
1302                 # added to the URL
1303                 if (defined $params{'action'}) {
1304                         $href .= "/".esc_path_info($params{'action'})
1305                                 unless $params{'action'} eq 'summary';
1306                         delete $params{'action'};
1307                 }
1308
1309                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1310                 # stripping nonexistent or useless pieces
1311                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1312                         || $params{'hash_parent'} || $params{'hash'});
1313                 if (defined $params{'hash_base'}) {
1314                         if (defined $params{'hash_parent_base'}) {
1315                                 $href .= esc_path_info($params{'hash_parent_base'});
1316                                 # skip the file_parent if it's the same as the file_name
1317                                 if (defined $params{'file_parent'}) {
1318                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1319                                                 delete $params{'file_parent'};
1320                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1321                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1322                                                 delete $params{'file_parent'};
1323                                         }
1324                                 }
1325                                 $href .= "..";
1326                                 delete $params{'hash_parent'};
1327                                 delete $params{'hash_parent_base'};
1328                         } elsif (defined $params{'hash_parent'}) {
1329                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1330                                 delete $params{'hash_parent'};
1331                         }
1332
1333                         $href .= esc_path_info($params{'hash_base'});
1334                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1335                                 $href .= ":/".esc_path_info($params{'file_name'});
1336                                 delete $params{'file_name'};
1337                         }
1338                         delete $params{'hash'};
1339                         delete $params{'hash_base'};
1340                 } elsif (defined $params{'hash'}) {
1341                         $href .= esc_path_info($params{'hash'});
1342                         delete $params{'hash'};
1343                 }
1344
1345                 # If the action was a snapshot, we can absorb the
1346                 # snapshot_format parameter too
1347                 if ($is_snapshot) {
1348                         my $fmt = $params{'snapshot_format'};
1349                         # snapshot_format should always be defined when href()
1350                         # is called, but just in case some code forgets, we
1351                         # fall back to the default
1352                         $fmt ||= $snapshot_fmts[0];
1353                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1354                         delete $params{'snapshot_format'};
1355                 }
1356         }
1357
1358         # now encode the parameters explicitly
1359         my @result = ();
1360         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1361                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1362                 if (defined $params{$name}) {
1363                         if (ref($params{$name}) eq "ARRAY") {
1364                                 foreach my $par (@{$params{$name}}) {
1365                                         push @result, $symbol . "=" . esc_param($par);
1366                                 }
1367                         } else {
1368                                 push @result, $symbol . "=" . esc_param($params{$name});
1369                         }
1370                 }
1371         }
1372         $href .= "?" . join(';', @result) if scalar @result;
1373
1374         # final transformation: trailing spaces must be escaped (URI-encoded)
1375         $href =~ s/(\s+)$/CGI::escape($1)/e;
1376
1377         if ($params{-anchor}) {
1378                 $href .= "#".esc_param($params{-anchor});
1379         }
1380
1381         return $href;
1382 }
1383
1384
1385 ## ======================================================================
1386 ## validation, quoting/unquoting and escaping
1387
1388 sub validate_action {
1389         my $input = shift || return undef;
1390         return undef unless exists $actions{$input};
1391         return $input;
1392 }
1393
1394 sub validate_project {
1395         my $input = shift || return undef;
1396         if (!validate_pathname($input) ||
1397                 !(-d "$projectroot/$input") ||
1398                 !check_export_ok("$projectroot/$input") ||
1399                 ($strict_export && !project_in_list($input))) {
1400                 return undef;
1401         } else {
1402                 return $input;
1403         }
1404 }
1405
1406 sub validate_pathname {
1407         my $input = shift || return undef;
1408
1409         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1410         # at the beginning, at the end, and between slashes.
1411         # also this catches doubled slashes
1412         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1413                 return undef;
1414         }
1415         # no null characters
1416         if ($input =~ m!\0!) {
1417                 return undef;
1418         }
1419         return $input;
1420 }
1421
1422 sub validate_refname {
1423         my $input = shift || return undef;
1424
1425         # textual hashes are O.K.
1426         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1427                 return $input;
1428         }
1429         # it must be correct pathname
1430         $input = validate_pathname($input)
1431                 or return undef;
1432         # restrictions on ref name according to git-check-ref-format
1433         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1434                 return undef;
1435         }
1436         return $input;
1437 }
1438
1439 # decode sequences of octets in utf8 into Perl's internal form,
1440 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1441 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1442 sub to_utf8 {
1443         my $str = shift;
1444         return undef unless defined $str;
1445         if (utf8::valid($str)) {
1446                 utf8::decode($str);
1447                 return $str;
1448         } else {
1449                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1450         }
1451 }
1452
1453 # quote unsafe chars, but keep the slash, even when it's not
1454 # correct, but quoted slashes look too horrible in bookmarks
1455 sub esc_param {
1456         my $str = shift;
1457         return undef unless defined $str;
1458         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1459         $str =~ s/ /\+/g;
1460         return $str;
1461 }
1462
1463 # the quoting rules for path_info fragment are slightly different
1464 sub esc_path_info {
1465         my $str = shift;
1466         return undef unless defined $str;
1467
1468         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1469         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1470
1471         return $str;
1472 }
1473
1474 # quote unsafe chars in whole URL, so some characters cannot be quoted
1475 sub esc_url {
1476         my $str = shift;
1477         return undef unless defined $str;
1478         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1479         $str =~ s/ /\+/g;
1480         return $str;
1481 }
1482
1483 # quote unsafe characters in HTML attributes
1484 sub esc_attr {
1485
1486         # for XHTML conformance escaping '"' to '&quot;' is not enough
1487         return esc_html(@_);
1488 }
1489
1490 # replace invalid utf8 character with SUBSTITUTION sequence
1491 sub esc_html {
1492         my $str = shift;
1493         my %opts = @_;
1494
1495         return undef unless defined $str;
1496
1497         $str = to_utf8($str);
1498         $str = $cgi->escapeHTML($str);
1499         if ($opts{'-nbsp'}) {
1500                 $str =~ s/ /&nbsp;/g;
1501         }
1502         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1503         return $str;
1504 }
1505
1506 # quote control characters and escape filename to HTML
1507 sub esc_path {
1508         my $str = shift;
1509         my %opts = @_;
1510
1511         return undef unless defined $str;
1512
1513         $str = to_utf8($str);
1514         $str = $cgi->escapeHTML($str);
1515         if ($opts{'-nbsp'}) {
1516                 $str =~ s/ /&nbsp;/g;
1517         }
1518         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1519         return $str;
1520 }
1521
1522 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1523 sub sanitize {
1524         my $str = shift;
1525
1526         return undef unless defined $str;
1527
1528         $str = to_utf8($str);
1529         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1530         return $str;
1531 }
1532
1533 # Make control characters "printable", using character escape codes (CEC)
1534 sub quot_cec {
1535         my $cntrl = shift;
1536         my %opts = @_;
1537         my %es = ( # character escape codes, aka escape sequences
1538                 "\t" => '\t',   # tab            (HT)
1539                 "\n" => '\n',   # line feed      (LF)
1540                 "\r" => '\r',   # carrige return (CR)
1541                 "\f" => '\f',   # form feed      (FF)
1542                 "\b" => '\b',   # backspace      (BS)
1543                 "\a" => '\a',   # alarm (bell)   (BEL)
1544                 "\e" => '\e',   # escape         (ESC)
1545                 "\013" => '\v', # vertical tab   (VT)
1546                 "\000" => '\0', # nul character  (NUL)
1547         );
1548         my $chr = ( (exists $es{$cntrl})
1549                     ? $es{$cntrl}
1550                     : sprintf('\%2x', ord($cntrl)) );
1551         if ($opts{-nohtml}) {
1552                 return $chr;
1553         } else {
1554                 return "<span class=\"cntrl\">$chr</span>";
1555         }
1556 }
1557
1558 # Alternatively use unicode control pictures codepoints,
1559 # Unicode "printable representation" (PR)
1560 sub quot_upr {
1561         my $cntrl = shift;
1562         my %opts = @_;
1563
1564         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1565         if ($opts{-nohtml}) {
1566                 return $chr;
1567         } else {
1568                 return "<span class=\"cntrl\">$chr</span>";
1569         }
1570 }
1571
1572 # git may return quoted and escaped filenames
1573 sub unquote {
1574         my $str = shift;
1575
1576         sub unq {
1577                 my $seq = shift;
1578                 my %es = ( # character escape codes, aka escape sequences
1579                         't' => "\t",   # tab            (HT, TAB)
1580                         'n' => "\n",   # newline        (NL)
1581                         'r' => "\r",   # return         (CR)
1582                         'f' => "\f",   # form feed      (FF)
1583                         'b' => "\b",   # backspace      (BS)
1584                         'a' => "\a",   # alarm (bell)   (BEL)
1585                         'e' => "\e",   # escape         (ESC)
1586                         'v' => "\013", # vertical tab   (VT)
1587                 );
1588
1589                 if ($seq =~ m/^[0-7]{1,3}$/) {
1590                         # octal char sequence
1591                         return chr(oct($seq));
1592                 } elsif (exists $es{$seq}) {
1593                         # C escape sequence, aka character escape code
1594                         return $es{$seq};
1595                 }
1596                 # quoted ordinary character
1597                 return $seq;
1598         }
1599
1600         if ($str =~ m/^"(.*)"$/) {
1601                 # needs unquoting
1602                 $str = $1;
1603                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1604         }
1605         return $str;
1606 }
1607
1608 # escape tabs (convert tabs to spaces)
1609 sub untabify {
1610         my $line = shift;
1611
1612         while ((my $pos = index($line, "\t")) != -1) {
1613                 if (my $count = (8 - ($pos % 8))) {
1614                         my $spaces = ' ' x $count;
1615                         $line =~ s/\t/$spaces/;
1616                 }
1617         }
1618
1619         return $line;
1620 }
1621
1622 sub project_in_list {
1623         my $project = shift;
1624         my @list = git_get_projects_list();
1625         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1626 }
1627
1628 ## ----------------------------------------------------------------------
1629 ## HTML aware string manipulation
1630
1631 # Try to chop given string on a word boundary between position
1632 # $len and $len+$add_len. If there is no word boundary there,
1633 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1634 # (marking chopped part) would be longer than given string.
1635 sub chop_str {
1636         my $str = shift;
1637         my $len = shift;
1638         my $add_len = shift || 10;
1639         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1640
1641         # Make sure perl knows it is utf8 encoded so we don't
1642         # cut in the middle of a utf8 multibyte char.
1643         $str = to_utf8($str);
1644
1645         # allow only $len chars, but don't cut a word if it would fit in $add_len
1646         # if it doesn't fit, cut it if it's still longer than the dots we would add
1647         # remove chopped character entities entirely
1648
1649         # when chopping in the middle, distribute $len into left and right part
1650         # return early if chopping wouldn't make string shorter
1651         if ($where eq 'center') {
1652                 return $str if ($len + 5 >= length($str)); # filler is length 5
1653                 $len = int($len/2);
1654         } else {
1655                 return $str if ($len + 4 >= length($str)); # filler is length 4
1656         }
1657
1658         # regexps: ending and beginning with word part up to $add_len
1659         my $endre = qr/.{$len}\w{0,$add_len}/;
1660         my $begre = qr/\w{0,$add_len}.{$len}/;
1661
1662         if ($where eq 'left') {
1663                 $str =~ m/^(.*?)($begre)$/;
1664                 my ($lead, $body) = ($1, $2);
1665                 if (length($lead) > 4) {
1666                         $lead = " ...";
1667                 }
1668                 return "$lead$body";
1669
1670         } elsif ($where eq 'center') {
1671                 $str =~ m/^($endre)(.*)$/;
1672                 my ($left, $str)  = ($1, $2);
1673                 $str =~ m/^(.*?)($begre)$/;
1674                 my ($mid, $right) = ($1, $2);
1675                 if (length($mid) > 5) {
1676                         $mid = " ... ";
1677                 }
1678                 return "$left$mid$right";
1679
1680         } else {
1681                 $str =~ m/^($endre)(.*)$/;
1682                 my $body = $1;
1683                 my $tail = $2;
1684                 if (length($tail) > 4) {
1685                         $tail = "... ";
1686                 }
1687                 return "$body$tail";
1688         }
1689 }
1690
1691 # takes the same arguments as chop_str, but also wraps a <span> around the
1692 # result with a title attribute if it does get chopped. Additionally, the
1693 # string is HTML-escaped.
1694 sub chop_and_escape_str {
1695         my ($str) = @_;
1696
1697         my $chopped = chop_str(@_);
1698         if ($chopped eq $str) {
1699                 return esc_html($chopped);
1700         } else {
1701                 $str =~ s/[[:cntrl:]]/?/g;
1702                 return $cgi->span({-title=>$str}, esc_html($chopped));
1703         }
1704 }
1705
1706 ## ----------------------------------------------------------------------
1707 ## functions returning short strings
1708
1709 # CSS class for given age value (in seconds)
1710 sub age_class {
1711         my $age = shift;
1712
1713         if (!defined $age) {
1714                 return "noage";
1715         } elsif ($age < 60*60*2) {
1716                 return "age0";
1717         } elsif ($age < 60*60*24*2) {
1718                 return "age1";
1719         } else {
1720                 return "age2";
1721         }
1722 }
1723
1724 # convert age in seconds to "nn units ago" string
1725 sub age_string {
1726         my $age = shift;
1727         my $age_str;
1728
1729         if ($age > 60*60*24*365*2) {
1730                 $age_str = (int $age/60/60/24/365);
1731                 $age_str .= " years ago";
1732         } elsif ($age > 60*60*24*(365/12)*2) {
1733                 $age_str = int $age/60/60/24/(365/12);
1734                 $age_str .= " months ago";
1735         } elsif ($age > 60*60*24*7*2) {
1736                 $age_str = int $age/60/60/24/7;
1737                 $age_str .= " weeks ago";
1738         } elsif ($age > 60*60*24*2) {
1739                 $age_str = int $age/60/60/24;
1740                 $age_str .= " days ago";
1741         } elsif ($age > 60*60*2) {
1742                 $age_str = int $age/60/60;
1743                 $age_str .= " hours ago";
1744         } elsif ($age > 60*2) {
1745                 $age_str = int $age/60;
1746                 $age_str .= " min ago";
1747         } elsif ($age > 2) {
1748                 $age_str = int $age;
1749                 $age_str .= " sec ago";
1750         } else {
1751                 $age_str .= " right now";
1752         }
1753         return $age_str;
1754 }
1755
1756 use constant {
1757         S_IFINVALID => 0030000,
1758         S_IFGITLINK => 0160000,
1759 };
1760
1761 # submodule/subproject, a commit object reference
1762 sub S_ISGITLINK {
1763         my $mode = shift;
1764
1765         return (($mode & S_IFMT) == S_IFGITLINK)
1766 }
1767
1768 # convert file mode in octal to symbolic file mode string
1769 sub mode_str {
1770         my $mode = oct shift;
1771
1772         if (S_ISGITLINK($mode)) {
1773                 return 'm---------';
1774         } elsif (S_ISDIR($mode & S_IFMT)) {
1775                 return 'drwxr-xr-x';
1776         } elsif (S_ISLNK($mode)) {
1777                 return 'lrwxrwxrwx';
1778         } elsif (S_ISREG($mode)) {
1779                 # git cares only about the executable bit
1780                 if ($mode & S_IXUSR) {
1781                         return '-rwxr-xr-x';
1782                 } else {
1783                         return '-rw-r--r--';
1784                 };
1785         } else {
1786                 return '----------';
1787         }
1788 }
1789
1790 # convert file mode in octal to file type string
1791 sub file_type {
1792         my $mode = shift;
1793
1794         if ($mode !~ m/^[0-7]+$/) {
1795                 return $mode;
1796         } else {
1797                 $mode = oct $mode;
1798         }
1799
1800         if (S_ISGITLINK($mode)) {
1801                 return "submodule";
1802         } elsif (S_ISDIR($mode & S_IFMT)) {
1803                 return "directory";
1804         } elsif (S_ISLNK($mode)) {
1805                 return "symlink";
1806         } elsif (S_ISREG($mode)) {
1807                 return "file";
1808         } else {
1809                 return "unknown";
1810         }
1811 }
1812
1813 # convert file mode in octal to file type description string
1814 sub file_type_long {
1815         my $mode = shift;
1816
1817         if ($mode !~ m/^[0-7]+$/) {
1818                 return $mode;
1819         } else {
1820                 $mode = oct $mode;
1821         }
1822
1823         if (S_ISGITLINK($mode)) {
1824                 return "submodule";
1825         } elsif (S_ISDIR($mode & S_IFMT)) {
1826                 return "directory";
1827         } elsif (S_ISLNK($mode)) {
1828                 return "symlink";
1829         } elsif (S_ISREG($mode)) {
1830                 if ($mode & S_IXUSR) {
1831                         return "executable";
1832                 } else {
1833                         return "file";
1834                 };
1835         } else {
1836                 return "unknown";
1837         }
1838 }
1839
1840
1841 ## ----------------------------------------------------------------------
1842 ## functions returning short HTML fragments, or transforming HTML fragments
1843 ## which don't belong to other sections
1844
1845 # format line of commit message.
1846 sub format_log_line_html {
1847         my $line = shift;
1848
1849         $line = esc_html($line, -nbsp=>1);
1850         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1851                 $cgi->a({-href => href(action=>"object", hash=>$1),
1852                                         -class => "text"}, $1);
1853         }eg;
1854
1855         return $line;
1856 }
1857
1858 # format marker of refs pointing to given object
1859
1860 # the destination action is chosen based on object type and current context:
1861 # - for annotated tags, we choose the tag view unless it's the current view
1862 #   already, in which case we go to shortlog view
1863 # - for other refs, we keep the current view if we're in history, shortlog or
1864 #   log view, and select shortlog otherwise
1865 sub format_ref_marker {
1866         my ($refs, $id) = @_;
1867         my $markers = '';
1868
1869         if (defined $refs->{$id}) {
1870                 foreach my $ref (@{$refs->{$id}}) {
1871                         # this code exploits the fact that non-lightweight tags are the
1872                         # only indirect objects, and that they are the only objects for which
1873                         # we want to use tag instead of shortlog as action
1874                         my ($type, $name) = qw();
1875                         my $indirect = ($ref =~ s/\^\{\}$//);
1876                         # e.g. tags/v2.6.11 or heads/next
1877                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1878                                 $type = $1;
1879                                 $name = $2;
1880                         } else {
1881                                 $type = "ref";
1882                                 $name = $ref;
1883                         }
1884
1885                         my $class = $type;
1886                         $class .= " indirect" if $indirect;
1887
1888                         my $dest_action = "shortlog";
1889
1890                         if ($indirect) {
1891                                 $dest_action = "tag" unless $action eq "tag";
1892                         } elsif ($action =~ /^(history|(short)?log)$/) {
1893                                 $dest_action = $action;
1894                         }
1895
1896                         my $dest = "";
1897                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1898                         $dest .= $ref;
1899
1900                         my $link = $cgi->a({
1901                                 -href => href(
1902                                         action=>$dest_action,
1903                                         hash=>$dest
1904                                 )}, $name);
1905
1906                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1907                                 $link . "</span>";
1908                 }
1909         }
1910
1911         if ($markers) {
1912                 return ' <span class="refs">'. $markers . '</span>';
1913         } else {
1914                 return "";
1915         }
1916 }
1917
1918 # format, perhaps shortened and with markers, title line
1919 sub format_subject_html {
1920         my ($long, $short, $href, $extra) = @_;
1921         $extra = '' unless defined($extra);
1922
1923         if (length($short) < length($long)) {
1924                 $long =~ s/[[:cntrl:]]/?/g;
1925                 return $cgi->a({-href => $href, -class => "list subject",
1926                                 -title => to_utf8($long)},
1927                        esc_html($short)) . $extra;
1928         } else {
1929                 return $cgi->a({-href => $href, -class => "list subject"},
1930                        esc_html($long)) . $extra;
1931         }
1932 }
1933
1934 # Rather than recomputing the url for an email multiple times, we cache it
1935 # after the first hit. This gives a visible benefit in views where the avatar
1936 # for the same email is used repeatedly (e.g. shortlog).
1937 # The cache is shared by all avatar engines (currently gravatar only), which
1938 # are free to use it as preferred. Since only one avatar engine is used for any
1939 # given page, there's no risk for cache conflicts.
1940 our %avatar_cache = ();
1941
1942 # Compute the picon url for a given email, by using the picon search service over at
1943 # http://www.cs.indiana.edu/picons/search.html
1944 sub picon_url {
1945         my $email = lc shift;
1946         if (!$avatar_cache{$email}) {
1947                 my ($user, $domain) = split('@', $email);
1948                 $avatar_cache{$email} =
1949                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1950                         "$domain/$user/" .
1951                         "users+domains+unknown/up/single";
1952         }
1953         return $avatar_cache{$email};
1954 }
1955
1956 # Compute the gravatar url for a given email, if it's not in the cache already.
1957 # Gravatar stores only the part of the URL before the size, since that's the
1958 # one computationally more expensive. This also allows reuse of the cache for
1959 # different sizes (for this particular engine).
1960 sub gravatar_url {
1961         my $email = lc shift;
1962         my $size = shift;
1963         $avatar_cache{$email} ||=
1964                 "http://www.gravatar.com/avatar/" .
1965                         Digest::MD5::md5_hex($email) . "?s=";
1966         return $avatar_cache{$email} . $size;
1967 }
1968
1969 # Insert an avatar for the given $email at the given $size if the feature
1970 # is enabled.
1971 sub git_get_avatar {
1972         my ($email, %opts) = @_;
1973         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1974         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1975         $opts{-size} ||= 'default';
1976         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1977         my $url = "";
1978         if ($git_avatar eq 'gravatar') {
1979                 $url = gravatar_url($email, $size);
1980         } elsif ($git_avatar eq 'picon') {
1981                 $url = picon_url($email);
1982         }
1983         # Other providers can be added by extending the if chain, defining $url
1984         # as needed. If no variant puts something in $url, we assume avatars
1985         # are completely disabled/unavailable.
1986         if ($url) {
1987                 return $pre_white .
1988                        "<img width=\"$size\" " .
1989                             "class=\"avatar\" " .
1990                             "src=\"".esc_url($url)."\" " .
1991                             "alt=\"\" " .
1992                        "/>" . $post_white;
1993         } else {
1994                 return "";
1995         }
1996 }
1997
1998 sub format_search_author {
1999         my ($author, $searchtype, $displaytext) = @_;
2000         my $have_search = gitweb_check_feature('search');
2001
2002         if ($have_search) {
2003                 my $performed = "";
2004                 if ($searchtype eq 'author') {
2005                         $performed = "authored";
2006                 } elsif ($searchtype eq 'committer') {
2007                         $performed = "committed";
2008                 }
2009
2010                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2011                                 searchtext=>$author,
2012                                 searchtype=>$searchtype), class=>"list",
2013                                 title=>"Search for commits $performed by $author"},
2014                                 $displaytext);
2015
2016         } else {
2017                 return $displaytext;
2018         }
2019 }
2020
2021 # format the author name of the given commit with the given tag
2022 # the author name is chopped and escaped according to the other
2023 # optional parameters (see chop_str).
2024 sub format_author_html {
2025         my $tag = shift;
2026         my $co = shift;
2027         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2028         return "<$tag class=\"author\">" .
2029                format_search_author($co->{'author_name'}, "author",
2030                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2031                        $author) .
2032                "</$tag>";
2033 }
2034
2035 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2036 sub format_git_diff_header_line {
2037         my $line = shift;
2038         my $diffinfo = shift;
2039         my ($from, $to) = @_;
2040
2041         if ($diffinfo->{'nparents'}) {
2042                 # combined diff
2043                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2044                 if ($to->{'href'}) {
2045                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2046                                          esc_path($to->{'file'}));
2047                 } else { # file was deleted (no href)
2048                         $line .= esc_path($to->{'file'});
2049                 }
2050         } else {
2051                 # "ordinary" diff
2052                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2053                 if ($from->{'href'}) {
2054                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2055                                          'a/' . esc_path($from->{'file'}));
2056                 } else { # file was added (no href)
2057                         $line .= 'a/' . esc_path($from->{'file'});
2058                 }
2059                 $line .= ' ';
2060                 if ($to->{'href'}) {
2061                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2062                                          'b/' . esc_path($to->{'file'}));
2063                 } else { # file was deleted
2064                         $line .= 'b/' . esc_path($to->{'file'});
2065                 }
2066         }
2067
2068         return "<div class=\"diff header\">$line</div>\n";
2069 }
2070
2071 # format extended diff header line, before patch itself
2072 sub format_extended_diff_header_line {
2073         my $line = shift;
2074         my $diffinfo = shift;
2075         my ($from, $to) = @_;
2076
2077         # match <path>
2078         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2079                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2080                                        esc_path($from->{'file'}));
2081         }
2082         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2083                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2084                                  esc_path($to->{'file'}));
2085         }
2086         # match single <mode>
2087         if ($line =~ m/\s(\d{6})$/) {
2088                 $line .= '<span class="info"> (' .
2089                          file_type_long($1) .
2090                          ')</span>';
2091         }
2092         # match <hash>
2093         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2094                 # can match only for combined diff
2095                 $line = 'index ';
2096                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2097                         if ($from->{'href'}[$i]) {
2098                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2099                                                   -class=>"hash"},
2100                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2101                         } else {
2102                                 $line .= '0' x 7;
2103                         }
2104                         # separator
2105                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2106                 }
2107                 $line .= '..';
2108                 if ($to->{'href'}) {
2109                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2110                                          substr($diffinfo->{'to_id'},0,7));
2111                 } else {
2112                         $line .= '0' x 7;
2113                 }
2114
2115         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2116                 # can match only for ordinary diff
2117                 my ($from_link, $to_link);
2118                 if ($from->{'href'}) {
2119                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2120                                              substr($diffinfo->{'from_id'},0,7));
2121                 } else {
2122                         $from_link = '0' x 7;
2123                 }
2124                 if ($to->{'href'}) {
2125                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2126                                            substr($diffinfo->{'to_id'},0,7));
2127                 } else {
2128                         $to_link = '0' x 7;
2129                 }
2130                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2131                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2132         }
2133
2134         return $line . "<br/>\n";
2135 }
2136
2137 # format from-file/to-file diff header
2138 sub format_diff_from_to_header {
2139         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2140         my $line;
2141         my $result = '';
2142
2143         $line = $from_line;
2144         #assert($line =~ m/^---/) if DEBUG;
2145         # no extra formatting for "^--- /dev/null"
2146         if (! $diffinfo->{'nparents'}) {
2147                 # ordinary (single parent) diff
2148                 if ($line =~ m!^--- "?a/!) {
2149                         if ($from->{'href'}) {
2150                                 $line = '--- a/' .
2151                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2152                                                 esc_path($from->{'file'}));
2153                         } else {
2154                                 $line = '--- a/' .
2155                                         esc_path($from->{'file'});
2156                         }
2157                 }
2158                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2159
2160         } else {
2161                 # combined diff (merge commit)
2162                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2163                         if ($from->{'href'}[$i]) {
2164                                 $line = '--- ' .
2165                                         $cgi->a({-href=>href(action=>"blobdiff",
2166                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2167                                                              hash_parent_base=>$parents[$i],
2168                                                              file_parent=>$from->{'file'}[$i],
2169                                                              hash=>$diffinfo->{'to_id'},
2170                                                              hash_base=>$hash,
2171                                                              file_name=>$to->{'file'}),
2172                                                  -class=>"path",
2173                                                  -title=>"diff" . ($i+1)},
2174                                                 $i+1) .
2175                                         '/' .
2176                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2177                                                 esc_path($from->{'file'}[$i]));
2178                         } else {
2179                                 $line = '--- /dev/null';
2180                         }
2181                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2182                 }
2183         }
2184
2185         $line = $to_line;
2186         #assert($line =~ m/^\+\+\+/) if DEBUG;
2187         # no extra formatting for "^+++ /dev/null"
2188         if ($line =~ m!^\+\+\+ "?b/!) {
2189                 if ($to->{'href'}) {
2190                         $line = '+++ b/' .
2191                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2192                                         esc_path($to->{'file'}));
2193                 } else {
2194                         $line = '+++ b/' .
2195                                 esc_path($to->{'file'});
2196                 }
2197         }
2198         $result .= qq!<div class="diff to_file">$line</div>\n!;
2199
2200         return $result;
2201 }
2202
2203 # create note for patch simplified by combined diff
2204 sub format_diff_cc_simplified {
2205         my ($diffinfo, @parents) = @_;
2206         my $result = '';
2207
2208         $result .= "<div class=\"diff header\">" .
2209                    "diff --cc ";
2210         if (!is_deleted($diffinfo)) {
2211                 $result .= $cgi->a({-href => href(action=>"blob",
2212                                                   hash_base=>$hash,
2213                                                   hash=>$diffinfo->{'to_id'},
2214                                                   file_name=>$diffinfo->{'to_file'}),
2215                                     -class => "path"},
2216                                    esc_path($diffinfo->{'to_file'}));
2217         } else {
2218                 $result .= esc_path($diffinfo->{'to_file'});
2219         }
2220         $result .= "</div>\n" . # class="diff header"
2221                    "<div class=\"diff nodifferences\">" .
2222                    "Simple merge" .
2223                    "</div>\n"; # class="diff nodifferences"
2224
2225         return $result;
2226 }
2227
2228 # format patch (diff) line (not to be used for diff headers)
2229 sub format_diff_line {
2230         my $line = shift;
2231         my ($from, $to) = @_;
2232         my $diff_class = "";
2233
2234         chomp $line;
2235
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 # combined diff
2238                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2239                 if ($line =~ m/^\@{3}/) {
2240                         $diff_class = " chunk_header";
2241                 } elsif ($line =~ m/^\\/) {
2242                         $diff_class = " incomplete";
2243                 } elsif ($prefix =~ tr/+/+/) {
2244                         $diff_class = " add";
2245                 } elsif ($prefix =~ tr/-/-/) {
2246                         $diff_class = " rem";
2247                 }
2248         } else {
2249                 # assume ordinary diff
2250                 my $char = substr($line, 0, 1);
2251                 if ($char eq '+') {
2252                         $diff_class = " add";
2253                 } elsif ($char eq '-') {
2254                         $diff_class = " rem";
2255                 } elsif ($char eq '@') {
2256                         $diff_class = " chunk_header";
2257                 } elsif ($char eq "\\") {
2258                         $diff_class = " incomplete";
2259                 }
2260         }
2261         $line = untabify($line);
2262         if ($from && $to && $line =~ m/^\@{2} /) {
2263                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2264                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2265
2266                 $from_lines = 0 unless defined $from_lines;
2267                 $to_lines   = 0 unless defined $to_lines;
2268
2269                 if ($from->{'href'}) {
2270                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2271                                              -class=>"list"}, $from_text);
2272                 }
2273                 if ($to->{'href'}) {
2274                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2275                                              -class=>"list"}, $to_text);
2276                 }
2277                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2278                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2279                 return "<div class=\"diff$diff_class\">$line</div>\n";
2280         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2281                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2282                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2283
2284                 @from_text = split(' ', $ranges);
2285                 for (my $i = 0; $i < @from_text; ++$i) {
2286                         ($from_start[$i], $from_nlines[$i]) =
2287                                 (split(',', substr($from_text[$i], 1)), 0);
2288                 }
2289
2290                 $to_text   = pop @from_text;
2291                 $to_start  = pop @from_start;
2292                 $to_nlines = pop @from_nlines;
2293
2294                 $line = "<span class=\"chunk_info\">$prefix ";
2295                 for (my $i = 0; $i < @from_text; ++$i) {
2296                         if ($from->{'href'}[$i]) {
2297                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2298                                                   -class=>"list"}, $from_text[$i]);
2299                         } else {
2300                                 $line .= $from_text[$i];
2301                         }
2302                         $line .= " ";
2303                 }
2304                 if ($to->{'href'}) {
2305                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2306                                           -class=>"list"}, $to_text);
2307                 } else {
2308                         $line .= $to_text;
2309                 }
2310                 $line .= " $prefix</span>" .
2311                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2312                 return "<div class=\"diff$diff_class\">$line</div>\n";
2313         }
2314         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2315 }
2316
2317 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2318 # linked.  Pass the hash of the tree/commit to snapshot.
2319 sub format_snapshot_links {
2320         my ($hash) = @_;
2321         my $num_fmts = @snapshot_fmts;
2322         if ($num_fmts > 1) {
2323                 # A parenthesized list of links bearing format names.
2324                 # e.g. "snapshot (_tar.gz_ _zip_)"
2325                 return "snapshot (" . join(' ', map
2326                         $cgi->a({
2327                                 -href => href(
2328                                         action=>"snapshot",
2329                                         hash=>$hash,
2330                                         snapshot_format=>$_
2331                                 )
2332                         }, $known_snapshot_formats{$_}{'display'})
2333                 , @snapshot_fmts) . ")";
2334         } elsif ($num_fmts == 1) {
2335                 # A single "snapshot" link whose tooltip bears the format name.
2336                 # i.e. "_snapshot_"
2337                 my ($fmt) = @snapshot_fmts;
2338                 return
2339                         $cgi->a({
2340                                 -href => href(
2341                                         action=>"snapshot",
2342                                         hash=>$hash,
2343                                         snapshot_format=>$fmt
2344                                 ),
2345                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2346                         }, "snapshot");
2347         } else { # $num_fmts == 0
2348                 return undef;
2349         }
2350 }
2351
2352 ## ......................................................................
2353 ## functions returning values to be passed, perhaps after some
2354 ## transformation, to other functions; e.g. returning arguments to href()
2355
2356 # returns hash to be passed to href to generate gitweb URL
2357 # in -title key it returns description of link
2358 sub get_feed_info {
2359         my $format = shift || 'Atom';
2360         my %res = (action => lc($format));
2361
2362         # feed links are possible only for project views
2363         return unless (defined $project);
2364         # some views should link to OPML, or to generic project feed,
2365         # or don't have specific feed yet (so they should use generic)
2366         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2367
2368         my $branch;
2369         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2370         # from tag links; this also makes possible to detect branch links
2371         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2372             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2373                 $branch = $1;
2374         }
2375         # find log type for feed description (title)
2376         my $type = 'log';
2377         if (defined $file_name) {
2378                 $type  = "history of $file_name";
2379                 $type .= "/" if ($action eq 'tree');
2380                 $type .= " on '$branch'" if (defined $branch);
2381         } else {
2382                 $type = "log of $branch" if (defined $branch);
2383         }
2384
2385         $res{-title} = $type;
2386         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2387         $res{'file_name'} = $file_name;
2388
2389         return %res;
2390 }
2391
2392 ## ----------------------------------------------------------------------
2393 ## git utility subroutines, invoking git commands
2394
2395 # returns path to the core git executable and the --git-dir parameter as list
2396 sub git_cmd {
2397         $number_of_git_cmds++;
2398         return $GIT, '--git-dir='.$git_dir;
2399 }
2400
2401 # quote the given arguments for passing them to the shell
2402 # quote_command("command", "arg 1", "arg with ' and ! characters")
2403 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2404 # Try to avoid using this function wherever possible.
2405 sub quote_command {
2406         return join(' ',
2407                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2408 }
2409
2410 # get HEAD ref of given project as hash
2411 sub git_get_head_hash {
2412         return git_get_full_hash(shift, 'HEAD');
2413 }
2414
2415 sub git_get_full_hash {
2416         return git_get_hash(@_);
2417 }
2418
2419 sub git_get_short_hash {
2420         return git_get_hash(@_, '--short=7');
2421 }
2422
2423 sub git_get_hash {
2424         my ($project, $hash, @options) = @_;
2425         my $o_git_dir = $git_dir;
2426         my $retval = undef;
2427         $git_dir = "$projectroot/$project";
2428         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2429             '--verify', '-q', @options, $hash) {
2430                 $retval = <$fd>;
2431                 chomp $retval if defined $retval;
2432                 close $fd;
2433         }
2434         if (defined $o_git_dir) {
2435                 $git_dir = $o_git_dir;
2436         }
2437         return $retval;
2438 }
2439
2440 # get type of given object
2441 sub git_get_type {
2442         my $hash = shift;
2443
2444         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2445         my $type = <$fd>;
2446         close $fd or return;
2447         chomp $type;
2448         return $type;
2449 }
2450
2451 # repository configuration
2452 our $config_file = '';
2453 our %config;
2454
2455 # store multiple values for single key as anonymous array reference
2456 # single values stored directly in the hash, not as [ <value> ]
2457 sub hash_set_multi {
2458         my ($hash, $key, $value) = @_;
2459
2460         if (!exists $hash->{$key}) {
2461                 $hash->{$key} = $value;
2462         } elsif (!ref $hash->{$key}) {
2463                 $hash->{$key} = [ $hash->{$key}, $value ];
2464         } else {
2465                 push @{$hash->{$key}}, $value;
2466         }
2467 }
2468
2469 # return hash of git project configuration
2470 # optionally limited to some section, e.g. 'gitweb'
2471 sub git_parse_project_config {
2472         my $section_regexp = shift;
2473         my %config;
2474
2475         local $/ = "\0";
2476
2477         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2478                 or return;
2479
2480         while (my $keyval = <$fh>) {
2481                 chomp $keyval;
2482                 my ($key, $value) = split(/\n/, $keyval, 2);
2483
2484                 hash_set_multi(\%config, $key, $value)
2485                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2486         }
2487         close $fh;
2488
2489         return %config;
2490 }
2491
2492 # convert config value to boolean: 'true' or 'false'
2493 # no value, number > 0, 'true' and 'yes' values are true
2494 # rest of values are treated as false (never as error)
2495 sub config_to_bool {
2496         my $val = shift;
2497
2498         return 1 if !defined $val;             # section.key
2499
2500         # strip leading and trailing whitespace
2501         $val =~ s/^\s+//;
2502         $val =~ s/\s+$//;
2503
2504         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2505                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2506 }
2507
2508 # convert config value to simple decimal number
2509 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2510 # to be multiplied by 1024, 1048576, or 1073741824
2511 sub config_to_int {
2512         my $val = shift;
2513
2514         # strip leading and trailing whitespace
2515         $val =~ s/^\s+//;
2516         $val =~ s/\s+$//;
2517
2518         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2519                 $unit = lc($unit);
2520                 # unknown unit is treated as 1
2521                 return $num * ($unit eq 'g' ? 1073741824 :
2522                                $unit eq 'm' ?    1048576 :
2523                                $unit eq 'k' ?       1024 : 1);
2524         }
2525         return $val;
2526 }
2527
2528 # convert config value to array reference, if needed
2529 sub config_to_multi {
2530         my $val = shift;
2531
2532         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2533 }
2534
2535 sub git_get_project_config {
2536         my ($key, $type) = @_;
2537
2538         return unless defined $git_dir;
2539
2540         # key sanity check
2541         return unless ($key);
2542         # only subsection, if exists, is case sensitive,
2543         # and not lowercased by 'git config -z -l'
2544         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2545                 $key = join(".", lc($hi), $mi, lc($lo));
2546         } else {
2547                 $key = lc($key);
2548         }
2549         $key =~ s/^gitweb\.//;
2550         return if ($key =~ m/\W/);
2551
2552         # type sanity check
2553         if (defined $type) {
2554                 $type =~ s/^--//;
2555                 $type = undef
2556                         unless ($type eq 'bool' || $type eq 'int');
2557         }
2558
2559         # get config
2560         if (!defined $config_file ||
2561             $config_file ne "$git_dir/config") {
2562                 %config = git_parse_project_config('gitweb');
2563                 $config_file = "$git_dir/config";
2564         }
2565
2566         # check if config variable (key) exists
2567         return unless exists $config{"gitweb.$key"};
2568
2569         # ensure given type
2570         if (!defined $type) {
2571                 return $config{"gitweb.$key"};
2572         } elsif ($type eq 'bool') {
2573                 # backward compatibility: 'git config --bool' returns true/false
2574                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2575         } elsif ($type eq 'int') {
2576                 return config_to_int($config{"gitweb.$key"});
2577         }
2578         return $config{"gitweb.$key"};
2579 }
2580
2581 # get hash of given path at given ref
2582 sub git_get_hash_by_path {
2583         my $base = shift;
2584         my $path = shift || return undef;
2585         my $type = shift;
2586
2587         $path =~ s,/+$,,;
2588
2589         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2590                 or die_error(500, "Open git-ls-tree failed");
2591         my $line = <$fd>;
2592         close $fd or return undef;
2593
2594         if (!defined $line) {
2595                 # there is no tree or hash given by $path at $base
2596                 return undef;
2597         }
2598
2599         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2600         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2601         if (defined $type && $type ne $2) {
2602                 # type doesn't match
2603                 return undef;
2604         }
2605         return $3;
2606 }
2607
2608 # get path of entry with given hash at given tree-ish (ref)
2609 # used to get 'from' filename for combined diff (merge commit) for renames
2610 sub git_get_path_by_hash {
2611         my $base = shift || return;
2612         my $hash = shift || return;
2613
2614         local $/ = "\0";
2615
2616         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2617                 or return undef;
2618         while (my $line = <$fd>) {
2619                 chomp $line;
2620
2621                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2622                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2623                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2624                         close $fd;
2625                         return $1;
2626                 }
2627         }
2628         close $fd;
2629         return undef;
2630 }
2631
2632 ## ......................................................................
2633 ## git utility functions, directly accessing git repository
2634
2635 # get the value of config variable either from file named as the variable
2636 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2637 # configuration variable in the repository config file.
2638 sub git_get_file_or_project_config {
2639         my ($path, $name) = @_;
2640
2641         $git_dir = "$projectroot/$path";
2642         open my $fd, '<', "$git_dir/$name"
2643                 or return git_get_project_config($name);
2644         my $conf = <$fd>;
2645         close $fd;
2646         if (defined $conf) {
2647                 chomp $conf;
2648         }
2649         return $conf;
2650 }
2651
2652 sub git_get_project_description {
2653         my $path = shift;
2654         return git_get_file_or_project_config($path, 'description');
2655 }
2656
2657 sub git_get_project_category {
2658         my $path = shift;
2659         return git_get_file_or_project_config($path, 'category');
2660 }
2661
2662
2663 # supported formats:
2664 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2665 #   - if its contents is a number, use it as tag weight,
2666 #   - otherwise add a tag with weight 1
2667 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2668 #   the same value multiple times increases tag weight
2669 # * `gitweb.ctag' multi-valued repo config variable
2670 sub git_get_project_ctags {
2671         my $project = shift;
2672         my $ctags = {};
2673
2674         $git_dir = "$projectroot/$project";
2675         if (opendir my $dh, "$git_dir/ctags") {
2676                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2677                 foreach my $tagfile (@files) {
2678                         open my $ct, '<', $tagfile
2679                                 or next;
2680                         my $val = <$ct>;
2681                         chomp $val if $val;
2682                         close $ct;
2683
2684                         (my $ctag = $tagfile) =~ s#.*/##;
2685                         if ($val =~ /^\d+$/) {
2686                                 $ctags->{$ctag} = $val;
2687                         } else {
2688                                 $ctags->{$ctag} = 1;
2689                         }
2690                 }
2691                 closedir $dh;
2692
2693         } elsif (open my $fh, '<', "$git_dir/ctags") {
2694                 while (my $line = <$fh>) {
2695                         chomp $line;
2696                         $ctags->{$line}++ if $line;
2697                 }
2698                 close $fh;
2699
2700         } else {
2701                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2702                 foreach my $tag (@$taglist) {
2703                         $ctags->{$tag}++;
2704                 }
2705         }
2706
2707         return $ctags;
2708 }
2709
2710 # return hash, where keys are content tags ('ctags'),
2711 # and values are sum of weights of given tag in every project
2712 sub git_gather_all_ctags {
2713         my $projects = shift;
2714         my $ctags = {};
2715
2716         foreach my $p (@$projects) {
2717                 foreach my $ct (keys %{$p->{'ctags'}}) {
2718                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2719                 }
2720         }
2721
2722         return $ctags;
2723 }
2724
2725 sub git_populate_project_tagcloud {
2726         my $ctags = shift;
2727
2728         # First, merge different-cased tags; tags vote on casing
2729         my %ctags_lc;
2730         foreach (keys %$ctags) {
2731                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2732                 if (not $ctags_lc{lc $_}->{topcount}
2733                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2734                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2735                         $ctags_lc{lc $_}->{topname} = $_;
2736                 }
2737         }
2738
2739         my $cloud;
2740         my $matched = $cgi->param('by_tag');
2741         if (eval { require HTML::TagCloud; 1; }) {
2742                 $cloud = HTML::TagCloud->new;
2743                 foreach my $ctag (sort keys %ctags_lc) {
2744                         # Pad the title with spaces so that the cloud looks
2745                         # less crammed.
2746                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2747                         $title =~ s/ /&nbsp;/g;
2748                         $title =~ s/^/&nbsp;/g;
2749                         $title =~ s/$/&nbsp;/g;
2750                         if (defined $matched && $matched eq $ctag) {
2751                                 $title = qq(<span class="match">$title</span>);
2752                         }
2753                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2754                                     $ctags_lc{$ctag}->{count});
2755                 }
2756         } else {
2757                 $cloud = {};
2758                 foreach my $ctag (keys %ctags_lc) {
2759                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2760                         if (defined $matched && $matched eq $ctag) {
2761                                 $title = qq(<span class="match">$title</span>);
2762                         }
2763                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2764                         $cloud->{$ctag}{ctag} =
2765                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2766                 }
2767         }
2768         return $cloud;
2769 }
2770
2771 sub git_show_project_tagcloud {
2772         my ($cloud, $count) = @_;
2773         if (ref $cloud eq 'HTML::TagCloud') {
2774                 return $cloud->html_and_css($count);
2775         } else {
2776                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2777                 return
2778                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2779                         join (', ', map {
2780                                 $cloud->{$_}->{'ctag'}
2781                         } splice(@tags, 0, $count)) .
2782                         '</div>';
2783         }
2784 }
2785
2786 sub git_get_project_url_list {
2787         my $path = shift;
2788
2789         $git_dir = "$projectroot/$path";
2790         open my $fd, '<', "$git_dir/cloneurl"
2791                 or return wantarray ?
2792                 @{ config_to_multi(git_get_project_config('url')) } :
2793                    config_to_multi(git_get_project_config('url'));
2794         my @git_project_url_list = map { chomp; $_ } <$fd>;
2795         close $fd;
2796
2797         return wantarray ? @git_project_url_list : \@git_project_url_list;
2798 }
2799
2800 sub git_get_projects_list {
2801         my $filter = shift || '';
2802         my @list;
2803
2804         $filter =~ s/\.git$//;
2805
2806         if (-d $projects_list) {
2807                 # search in directory
2808                 my $dir = $projects_list;
2809                 # remove the trailing "/"
2810                 $dir =~ s!/+$!!;
2811                 my $pfxlen = length("$projects_list");
2812                 my $pfxdepth = ($projects_list =~ tr!/!!);
2813                 # when filtering, search only given subdirectory
2814                 if ($filter) {
2815                         $dir .= "/$filter";
2816                         $dir =~ s!/+$!!;
2817                 }
2818
2819                 File::Find::find({
2820                         follow_fast => 1, # follow symbolic links
2821                         follow_skip => 2, # ignore duplicates
2822                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2823                         wanted => sub {
2824                                 # global variables
2825                                 our $project_maxdepth;
2826                                 our $projectroot;
2827                                 # skip project-list toplevel, if we get it.
2828                                 return if (m!^[/.]$!);
2829                                 # only directories can be git repositories
2830                                 return unless (-d $_);
2831                                 # don't traverse too deep (Find is super slow on os x)
2832                                 # $project_maxdepth excludes depth of $projectroot
2833                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2834                                         $File::Find::prune = 1;
2835                                         return;
2836                                 }
2837
2838                                 my $path = substr($File::Find::name, $pfxlen + 1);
2839                                 # we check related file in $projectroot
2840                                 if (check_export_ok("$projectroot/$path")) {
2841                                         push @list, { path => $path };
2842                                         $File::Find::prune = 1;
2843                                 }
2844                         },
2845                 }, "$dir");
2846
2847         } elsif (-f $projects_list) {
2848                 # read from file(url-encoded):
2849                 # 'git%2Fgit.git Linus+Torvalds'
2850                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2851                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2852                 open my $fd, '<', $projects_list or return;
2853         PROJECT:
2854                 while (my $line = <$fd>) {
2855                         chomp $line;
2856                         my ($path, $owner) = split ' ', $line;
2857                         $path = unescape($path);
2858                         $owner = unescape($owner);
2859                         if (!defined $path) {
2860                                 next;
2861                         }
2862                         # if $filter is rpovided, check if $path begins with $filter
2863                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2864                                 next;
2865                         }
2866                         if (check_export_ok("$projectroot/$path")) {
2867                                 my $pr = {
2868                                         path => $path,
2869                                         owner => to_utf8($owner),
2870                                 };
2871                                 push @list, $pr;
2872                         }
2873                 }
2874                 close $fd;
2875         }
2876         return @list;
2877 }
2878
2879 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2880 # as side effects it sets 'forks' field to list of forks for forked projects
2881 sub filter_forks_from_projects_list {
2882         my $projects = shift;
2883
2884         my %trie; # prefix tree of directories (path components)
2885         # generate trie out of those directories that might contain forks
2886         foreach my $pr (@$projects) {
2887                 my $path = $pr->{'path'};
2888                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2889                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2890                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2891                 next unless (-d "$projectroot/$path"); # containing directory exists
2892                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2893
2894                 # add to trie
2895                 my @dirs = split('/', $path);
2896                 # walk the trie, until either runs out of components or out of trie
2897                 my $ref = \%trie;
2898                 while (scalar @dirs &&
2899                        exists($ref->{$dirs[0]})) {
2900                         $ref = $ref->{shift @dirs};
2901                 }
2902                 # create rest of trie structure from rest of components
2903                 foreach my $dir (@dirs) {
2904                         $ref = $ref->{$dir} = {};
2905                 }
2906                 # create end marker, store $pr as a data
2907                 $ref->{''} = $pr if (!exists $ref->{''});
2908         }
2909
2910         # filter out forks, by finding shortest prefix match for paths
2911         my @filtered;
2912  PROJECT:
2913         foreach my $pr (@$projects) {
2914                 # trie lookup
2915                 my $ref = \%trie;
2916         DIR:
2917                 foreach my $dir (split('/', $pr->{'path'})) {
2918                         if (exists $ref->{''}) {
2919                                 # found [shortest] prefix, is a fork - skip it
2920                                 push @{$ref->{''}{'forks'}}, $pr;
2921                                 next PROJECT;
2922                         }
2923                         if (!exists $ref->{$dir}) {
2924                                 # not in trie, cannot have prefix, not a fork
2925                                 push @filtered, $pr;
2926                                 next PROJECT;
2927                         }
2928                         # If the dir is there, we just walk one step down the trie.
2929                         $ref = $ref->{$dir};
2930                 }
2931                 # we ran out of trie
2932                 # (shouldn't happen: it's either no match, or end marker)
2933                 push @filtered, $pr;
2934         }
2935
2936         return @filtered;
2937 }
2938
2939 # note: fill_project_list_info must be run first,
2940 # for 'descr_long' and 'ctags' to be filled
2941 sub search_projects_list {
2942         my ($projlist, %opts) = @_;
2943         my $tagfilter  = $opts{'tagfilter'};
2944         my $searchtext = $opts{'searchtext'};
2945
2946         return @$projlist
2947                 unless ($tagfilter || $searchtext);
2948
2949         my @projects;
2950  PROJECT:
2951         foreach my $pr (@$projlist) {
2952
2953                 if ($tagfilter) {
2954                         next unless ref($pr->{'ctags'}) eq 'HASH';
2955                         next unless
2956                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2957                 }
2958
2959                 if ($searchtext) {
2960                         next unless
2961                                 $pr->{'path'} =~ /$searchtext/ ||
2962                                 $pr->{'descr_long'} =~ /$searchtext/;
2963                 }
2964
2965                 push @projects, $pr;
2966         }
2967
2968         return @projects;
2969 }
2970
2971 our $gitweb_project_owner = undef;
2972 sub git_get_project_list_from_file {
2973
2974         return if (defined $gitweb_project_owner);
2975
2976         $gitweb_project_owner = {};
2977         # read from file (url-encoded):
2978         # 'git%2Fgit.git Linus+Torvalds'
2979         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2980         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2981         if (-f $projects_list) {
2982                 open(my $fd, '<', $projects_list);
2983                 while (my $line = <$fd>) {
2984                         chomp $line;
2985                         my ($pr, $ow) = split ' ', $line;
2986                         $pr = unescape($pr);
2987                         $ow = unescape($ow);
2988                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2989                 }
2990                 close $fd;
2991         }
2992 }
2993
2994 sub git_get_project_owner {
2995         my $project = shift;
2996         my $owner;
2997
2998         return undef unless $project;
2999         $git_dir = "$projectroot/$project";
3000
3001         if (!defined $gitweb_project_owner) {
3002                 git_get_project_list_from_file();
3003         }
3004
3005         if (exists $gitweb_project_owner->{$project}) {
3006                 $owner = $gitweb_project_owner->{$project};
3007         }
3008         if (!defined $owner){
3009                 $owner = git_get_project_config('owner');
3010         }
3011         if (!defined $owner) {
3012                 $owner = get_file_owner("$git_dir");
3013         }
3014
3015         return $owner;
3016 }
3017
3018 sub git_get_last_activity {
3019         my ($path) = @_;
3020         my $fd;
3021
3022         $git_dir = "$projectroot/$path";
3023         open($fd, "-|", git_cmd(), 'for-each-ref',
3024              '--format=%(committer)',
3025              '--sort=-committerdate',
3026              '--count=1',
3027              'refs/heads') or return;
3028         my $most_recent = <$fd>;
3029         close $fd or return;
3030         if (defined $most_recent &&
3031             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3032                 my $timestamp = $1;
3033                 my $age = time - $timestamp;
3034                 return ($age, age_string($age));
3035         }
3036         return (undef, undef);
3037 }
3038
3039 # Implementation note: when a single remote is wanted, we cannot use 'git
3040 # remote show -n' because that command always work (assuming it's a remote URL
3041 # if it's not defined), and we cannot use 'git remote show' because that would
3042 # try to make a network roundtrip. So the only way to find if that particular
3043 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3044 # and when we find what we want.
3045 sub git_get_remotes_list {
3046         my $wanted = shift;
3047         my %remotes = ();
3048
3049         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3050         return unless $fd;
3051         while (my $remote = <$fd>) {
3052                 chomp $remote;
3053                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3054                 next if $wanted and not $remote eq $wanted;
3055                 my ($url, $key) = ($1, $2);
3056
3057                 $remotes{$remote} ||= { 'heads' => () };
3058                 $remotes{$remote}{$key} = $url;
3059         }
3060         close $fd or return;
3061         return wantarray ? %remotes : \%remotes;
3062 }
3063
3064 # Takes a hash of remotes as first parameter and fills it by adding the
3065 # available remote heads for each of the indicated remotes.
3066 sub fill_remote_heads {
3067         my $remotes = shift;
3068         my @heads = map { "remotes/$_" } keys %$remotes;
3069         my @remoteheads = git_get_heads_list(undef, @heads);
3070         foreach my $remote (keys %$remotes) {
3071                 $remotes->{$remote}{'heads'} = [ grep {
3072                         $_->{'name'} =~ s!^$remote/!!
3073                         } @remoteheads ];
3074         }
3075 }
3076
3077 sub git_get_references {
3078         my $type = shift || "";
3079         my %refs;
3080         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3081         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3082         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3083                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3084                 or return;
3085
3086         while (my $line = <$fd>) {
3087                 chomp $line;
3088                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3089                         if (defined $refs{$1}) {
3090                                 push @{$refs{$1}}, $2;
3091                         } else {
3092                                 $refs{$1} = [ $2 ];
3093                         }
3094                 }
3095         }
3096         close $fd or return;
3097         return \%refs;
3098 }
3099
3100 sub git_get_rev_name_tags {
3101         my $hash = shift || return undef;
3102
3103         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3104                 or return;
3105         my $name_rev = <$fd>;
3106         close $fd;
3107
3108         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3109                 return $1;
3110         } else {
3111                 # catches also '$hash undefined' output
3112                 return undef;
3113         }
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## parse to hash functions
3118
3119 sub parse_date {
3120         my $epoch = shift;
3121         my $tz = shift || "-0000";
3122
3123         my %date;
3124         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3125         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3126         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3127         $date{'hour'} = $hour;
3128         $date{'minute'} = $min;
3129         $date{'mday'} = $mday;
3130         $date{'day'} = $days[$wday];
3131         $date{'month'} = $months[$mon];
3132         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3133                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3134         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3135                              $mday, $months[$mon], $hour ,$min;
3136         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3137                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3138
3139         my ($tz_sign, $tz_hour, $tz_min) =
3140                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3141         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3142         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3143         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3144         $date{'hour_local'} = $hour;
3145         $date{'minute_local'} = $min;
3146         $date{'tz_local'} = $tz;
3147         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3148                                   1900+$year, $mon+1, $mday,
3149                                   $hour, $min, $sec, $tz);
3150         return %date;
3151 }
3152
3153 sub parse_tag {
3154         my $tag_id = shift;
3155         my %tag;
3156         my @comment;
3157
3158         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3159         $tag{'id'} = $tag_id;
3160         while (my $line = <$fd>) {
3161                 chomp $line;
3162                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3163                         $tag{'object'} = $1;
3164                 } elsif ($line =~ m/^type (.+)$/) {
3165                         $tag{'type'} = $1;
3166                 } elsif ($line =~ m/^tag (.+)$/) {
3167                         $tag{'name'} = $1;
3168                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3169                         $tag{'author'} = $1;
3170                         $tag{'author_epoch'} = $2;
3171                         $tag{'author_tz'} = $3;
3172                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3173                                 $tag{'author_name'}  = $1;
3174                                 $tag{'author_email'} = $2;
3175                         } else {
3176                                 $tag{'author_name'} = $tag{'author'};
3177                         }
3178                 } elsif ($line =~ m/--BEGIN/) {
3179                         push @comment, $line;
3180                         last;
3181                 } elsif ($line eq "") {
3182                         last;
3183                 }
3184         }
3185         push @comment, <$fd>;
3186         $tag{'comment'} = \@comment;
3187         close $fd or return;
3188         if (!defined $tag{'name'}) {
3189                 return
3190         };
3191         return %tag
3192 }
3193
3194 sub parse_commit_text {
3195         my ($commit_text, $withparents) = @_;
3196         my @commit_lines = split '\n', $commit_text;
3197         my %co;
3198
3199         pop @commit_lines; # Remove '\0'
3200
3201         if (! @commit_lines) {
3202                 return;
3203         }
3204
3205         my $header = shift @commit_lines;
3206         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3207                 return;
3208         }
3209         ($co{'id'}, my @parents) = split ' ', $header;
3210         while (my $line = shift @commit_lines) {
3211                 last if $line eq "\n";
3212                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3213                         $co{'tree'} = $1;
3214                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3215                         push @parents, $1;
3216                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3217                         $co{'author'} = to_utf8($1);
3218                         $co{'author_epoch'} = $2;
3219                         $co{'author_tz'} = $3;
3220                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3221                                 $co{'author_name'}  = $1;
3222                                 $co{'author_email'} = $2;
3223                         } else {
3224                                 $co{'author_name'} = $co{'author'};
3225                         }
3226                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3227                         $co{'committer'} = to_utf8($1);
3228                         $co{'committer_epoch'} = $2;
3229                         $co{'committer_tz'} = $3;
3230                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3231                                 $co{'committer_name'}  = $1;
3232                                 $co{'committer_email'} = $2;
3233                         } else {
3234                                 $co{'committer_name'} = $co{'committer'};
3235                         }
3236                 }
3237         }
3238         if (!defined $co{'tree'}) {
3239                 return;
3240         };
3241         $co{'parents'} = \@parents;
3242         $co{'parent'} = $parents[0];
3243
3244         foreach my $title (@commit_lines) {
3245                 $title =~ s/^    //;
3246                 if ($title ne "") {
3247                         $co{'title'} = chop_str($title, 80, 5);
3248                         # remove leading stuff of merges to make the interesting part visible
3249                         if (length($title) > 50) {
3250                                 $title =~ s/^Automatic //;
3251                                 $title =~ s/^merge (of|with) /Merge ... /i;
3252                                 if (length($title) > 50) {
3253                                         $title =~ s/(http|rsync):\/\///;
3254                                 }
3255                                 if (length($title) > 50) {
3256                                         $title =~ s/(master|www|rsync)\.//;
3257                                 }
3258                                 if (length($title) > 50) {
3259                                         $title =~ s/kernel.org:?//;
3260                                 }
3261                                 if (length($title) > 50) {
3262                                         $title =~ s/\/pub\/scm//;
3263                                 }
3264                         }
3265                         $co{'title_short'} = chop_str($title, 50, 5);
3266                         last;
3267                 }
3268         }
3269         if (! defined $co{'title'} || $co{'title'} eq "") {
3270                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3271         }
3272         # remove added spaces
3273         foreach my $line (@commit_lines) {
3274                 $line =~ s/^    //;
3275         }
3276         $co{'comment'} = \@commit_lines;
3277
3278         my $age = time - $co{'committer_epoch'};
3279         $co{'age'} = $age;
3280         $co{'age_string'} = age_string($age);
3281         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3282         if ($age > 60*60*24*7*2) {
3283                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3284                 $co{'age_string_age'} = $co{'age_string'};
3285         } else {
3286                 $co{'age_string_date'} = $co{'age_string'};
3287                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3288         }
3289         return %co;
3290 }
3291
3292 sub parse_commit {
3293         my ($commit_id) = @_;
3294         my %co;
3295
3296         local $/ = "\0";
3297
3298         open my $fd, "-|", git_cmd(), "rev-list",
3299                 "--parents",
3300                 "--header",
3301                 "--max-count=1",
3302                 $commit_id,
3303                 "--",
3304                 or die_error(500, "Open git-rev-list failed");
3305         %co = parse_commit_text(<$fd>, 1);
3306         close $fd;
3307
3308         return %co;
3309 }
3310
3311 sub parse_commits {
3312         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3313         my @cos;
3314
3315         $maxcount ||= 1;
3316         $skip ||= 0;
3317
3318         local $/ = "\0";
3319
3320         open my $fd, "-|", git_cmd(), "rev-list",
3321                 "--header",
3322                 @args,
3323                 ("--max-count=" . $maxcount),
3324                 ("--skip=" . $skip),
3325                 @extra_options,
3326                 $commit_id,
3327                 "--",
3328                 ($filename ? ($filename) : ())
3329                 or die_error(500, "Open git-rev-list failed");
3330         while (my $line = <$fd>) {
3331                 my %co = parse_commit_text($line);
3332                 push @cos, \%co;
3333         }
3334         close $fd;
3335
3336         return wantarray ? @cos : \@cos;
3337 }
3338
3339 # parse line of git-diff-tree "raw" output
3340 sub parse_difftree_raw_line {
3341         my $line = shift;
3342         my %res;
3343
3344         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3345         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3346         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3347                 $res{'from_mode'} = $1;
3348                 $res{'to_mode'} = $2;
3349                 $res{'from_id'} = $3;
3350                 $res{'to_id'} = $4;
3351                 $res{'status'} = $5;
3352                 $res{'similarity'} = $6;
3353                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3354                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3355                 } else {
3356                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3357                 }
3358         }
3359         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3360         # combined diff (for merge commit)
3361         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3362                 $res{'nparents'}  = length($1);
3363                 $res{'from_mode'} = [ split(' ', $2) ];
3364                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3365                 $res{'from_id'} = [ split(' ', $3) ];
3366                 $res{'to_id'} = pop @{$res{'from_id'}};
3367                 $res{'status'} = [ split('', $4) ];
3368                 $res{'to_file'} = unquote($5);
3369         }
3370         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3371         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3372                 $res{'commit'} = $1;
3373         }
3374
3375         return wantarray ? %res : \%res;
3376 }
3377
3378 # wrapper: return parsed line of git-diff-tree "raw" output
3379 # (the argument might be raw line, or parsed info)
3380 sub parsed_difftree_line {
3381         my $line_or_ref = shift;
3382
3383         if (ref($line_or_ref) eq "HASH") {
3384                 # pre-parsed (or generated by hand)
3385                 return $line_or_ref;
3386         } else {
3387                 return parse_difftree_raw_line($line_or_ref);
3388         }
3389 }
3390
3391 # parse line of git-ls-tree output
3392 sub parse_ls_tree_line {
3393         my $line = shift;
3394         my %opts = @_;
3395         my %res;
3396
3397         if ($opts{'-l'}) {
3398                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3399                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3400
3401                 $res{'mode'} = $1;
3402                 $res{'type'} = $2;
3403                 $res{'hash'} = $3;
3404                 $res{'size'} = $4;
3405                 if ($opts{'-z'}) {
3406                         $res{'name'} = $5;
3407                 } else {
3408                         $res{'name'} = unquote($5);
3409                 }
3410         } else {
3411                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3412                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3413
3414                 $res{'mode'} = $1;
3415                 $res{'type'} = $2;
3416                 $res{'hash'} = $3;
3417                 if ($opts{'-z'}) {
3418                         $res{'name'} = $4;
3419                 } else {
3420                         $res{'name'} = unquote($4);
3421                 }
3422         }
3423
3424         return wantarray ? %res : \%res;
3425 }
3426
3427 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3428 sub parse_from_to_diffinfo {
3429         my ($diffinfo, $from, $to, @parents) = @_;
3430
3431         if ($diffinfo->{'nparents'}) {
3432                 # combined diff
3433                 $from->{'file'} = [];
3434                 $from->{'href'} = [];
3435                 fill_from_file_info($diffinfo, @parents)
3436                         unless exists $diffinfo->{'from_file'};
3437                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3438                         $from->{'file'}[$i] =
3439                                 defined $diffinfo->{'from_file'}[$i] ?
3440                                         $diffinfo->{'from_file'}[$i] :
3441                                         $diffinfo->{'to_file'};
3442                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3443                                 $from->{'href'}[$i] = href(action=>"blob",
3444                                                            hash_base=>$parents[$i],
3445                                                            hash=>$diffinfo->{'from_id'}[$i],
3446                                                            file_name=>$from->{'file'}[$i]);
3447                         } else {
3448                                 $from->{'href'}[$i] = undef;
3449                         }
3450                 }
3451         } else {
3452                 # ordinary (not combined) diff
3453                 $from->{'file'} = $diffinfo->{'from_file'};
3454                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3455                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3456                                                hash=>$diffinfo->{'from_id'},
3457                                                file_name=>$from->{'file'});
3458                 } else {
3459                         delete $from->{'href'};
3460                 }
3461         }
3462
3463         $to->{'file'} = $diffinfo->{'to_file'};
3464         if (!is_deleted($diffinfo)) { # file exists in result
3465                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3466                                      hash=>$diffinfo->{'to_id'},
3467                                      file_name=>$to->{'file'});
3468         } else {
3469                 delete $to->{'href'};
3470         }
3471 }
3472
3473 ## ......................................................................
3474 ## parse to array of hashes functions
3475
3476 sub git_get_heads_list {
3477         my ($limit, @classes) = @_;
3478         @classes = ('heads') unless @classes;
3479         my @patterns = map { "refs/$_" } @classes;
3480         my @headslist;
3481
3482         open my $fd, '-|', git_cmd(), 'for-each-ref',
3483                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3484                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3485                 @patterns
3486                 or return;
3487         while (my $line = <$fd>) {
3488                 my %ref_item;
3489
3490                 chomp $line;
3491                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3492                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3493                 my ($committer, $epoch, $tz) =
3494                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3495                 $ref_item{'fullname'}  = $name;
3496                 $name =~ s!^refs/(?:head|remote)s/!!;
3497
3498                 $ref_item{'name'}  = $name;
3499                 $ref_item{'id'}    = $hash;
3500                 $ref_item{'title'} = $title || '(no commit message)';
3501                 $ref_item{'epoch'} = $epoch;
3502                 if ($epoch) {
3503                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3504                 } else {
3505                         $ref_item{'age'} = "unknown";
3506                 }
3507
3508                 push @headslist, \%ref_item;
3509         }
3510         close $fd;
3511
3512         return wantarray ? @headslist : \@headslist;
3513 }
3514
3515 sub git_get_tags_list {
3516         my $limit = shift;
3517         my @tagslist;
3518
3519         open my $fd, '-|', git_cmd(), 'for-each-ref',
3520                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3521                 '--format=%(objectname) %(objecttype) %(refname) '.
3522                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3523                 'refs/tags'
3524                 or return;
3525         while (my $line = <$fd>) {
3526                 my %ref_item;
3527
3528                 chomp $line;
3529                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3530                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3531                 my ($creator, $epoch, $tz) =
3532                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3533                 $ref_item{'fullname'} = $name;
3534                 $name =~ s!^refs/tags/!!;
3535
3536                 $ref_item{'type'} = $type;
3537                 $ref_item{'id'} = $id;
3538                 $ref_item{'name'} = $name;
3539                 if ($type eq "tag") {
3540                         $ref_item{'subject'} = $title;
3541                         $ref_item{'reftype'} = $reftype;
3542                         $ref_item{'refid'}   = $refid;
3543                 } else {
3544                         $ref_item{'reftype'} = $type;
3545                         $ref_item{'refid'}   = $id;
3546                 }
3547
3548                 if ($type eq "tag" || $type eq "commit") {
3549                         $ref_item{'epoch'} = $epoch;
3550                         if ($epoch) {
3551                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3552                         } else {
3553                                 $ref_item{'age'} = "unknown";
3554                         }
3555                 }
3556
3557                 push @tagslist, \%ref_item;
3558         }
3559         close $fd;
3560
3561         return wantarray ? @tagslist : \@tagslist;
3562 }
3563
3564 ## ----------------------------------------------------------------------
3565 ## filesystem-related functions
3566
3567 sub get_file_owner {
3568         my $path = shift;
3569
3570         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3571         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3572         if (!defined $gcos) {
3573                 return undef;
3574         }
3575         my $owner = $gcos;
3576         $owner =~ s/[,;].*$//;
3577         return to_utf8($owner);
3578 }
3579
3580 # assume that file exists
3581 sub insert_file {
3582         my $filename = shift;
3583
3584         open my $fd, '<', $filename;
3585         print map { to_utf8($_) } <$fd>;
3586         close $fd;
3587 }
3588
3589 ## ......................................................................
3590 ## mimetype related functions
3591
3592 sub mimetype_guess_file {
3593         my $filename = shift;
3594         my $mimemap = shift;
3595         -r $mimemap or return undef;
3596
3597         my %mimemap;
3598         open(my $mh, '<', $mimemap) or return undef;
3599         while (<$mh>) {
3600                 next if m/^#/; # skip comments
3601                 my ($mimetype, @exts) = split(/\s+/);
3602                 foreach my $ext (@exts) {
3603                         $mimemap{$ext} = $mimetype;
3604                 }
3605         }
3606         close($mh);
3607
3608         $filename =~ /\.([^.]*)$/;
3609         return $mimemap{$1};
3610 }
3611
3612 sub mimetype_guess {
3613         my $filename = shift;
3614         my $mime;
3615         $filename =~ /\./ or return undef;
3616
3617         if ($mimetypes_file) {
3618                 my $file = $mimetypes_file;
3619                 if ($file !~ m!^/!) { # if it is relative path
3620                         # it is relative to project
3621                         $file = "$projectroot/$project/$file";
3622                 }
3623                 $mime = mimetype_guess_file($filename, $file);
3624         }
3625         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3626         return $mime;
3627 }
3628
3629 sub blob_mimetype {
3630         my $fd = shift;
3631         my $filename = shift;
3632
3633         if ($filename) {
3634                 my $mime = mimetype_guess($filename);
3635                 $mime and return $mime;
3636         }
3637
3638         # just in case
3639         return $default_blob_plain_mimetype unless $fd;
3640
3641         if (-T $fd) {
3642                 return 'text/plain';
3643         } elsif (! $filename) {
3644                 return 'application/octet-stream';
3645         } elsif ($filename =~ m/\.png$/i) {
3646                 return 'image/png';
3647         } elsif ($filename =~ m/\.gif$/i) {
3648                 return 'image/gif';
3649         } elsif ($filename =~ m/\.jpe?g$/i) {
3650                 return 'image/jpeg';
3651         } else {
3652                 return 'application/octet-stream';
3653         }
3654 }
3655
3656 sub blob_contenttype {
3657         my ($fd, $file_name, $type) = @_;
3658
3659         $type ||= blob_mimetype($fd, $file_name);
3660         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3661                 $type .= "; charset=$default_text_plain_charset";
3662         }
3663
3664         return $type;
3665 }
3666
3667 # guess file syntax for syntax highlighting; return undef if no highlighting
3668 # the name of syntax can (in the future) depend on syntax highlighter used
3669 sub guess_file_syntax {
3670         my ($highlight, $mimetype, $file_name) = @_;
3671         return undef unless ($highlight && defined $file_name);
3672         my $basename = basename($file_name, '.in');
3673         return $highlight_basename{$basename}
3674                 if exists $highlight_basename{$basename};
3675
3676         $basename =~ /\.([^.]*)$/;
3677         my $ext = $1 or return undef;
3678         return $highlight_ext{$ext}
3679                 if exists $highlight_ext{$ext};
3680
3681         return undef;
3682 }
3683
3684 # run highlighter and return FD of its output,
3685 # or return original FD if no highlighting
3686 sub run_highlighter {
3687         my ($fd, $highlight, $syntax) = @_;
3688         return $fd unless ($highlight && defined $syntax);
3689
3690         close $fd;
3691         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3692                   quote_command($highlight_bin).
3693                   " --replace-tabs=8 --fragment --syntax $syntax |"
3694                 or die_error(500, "Couldn't open file or run syntax highlighter");
3695         return $fd;
3696 }
3697
3698 ## ======================================================================
3699 ## functions printing HTML: header, footer, error page
3700
3701 sub get_page_title {
3702         my $title = to_utf8($site_name);
3703
3704         return $title unless (defined $project);
3705         $title .= " - " . to_utf8($project);
3706
3707         return $title unless (defined $action);
3708         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3709
3710         return $title unless (defined $file_name);
3711         $title .= " - " . esc_path($file_name);
3712         if ($action eq "tree" && $file_name !~ m|/$|) {
3713                 $title .= "/";
3714         }
3715
3716         return $title;
3717 }
3718
3719 sub get_content_type_html {
3720         # require explicit support from the UA if we are to send the page as
3721         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3722         # we have to do this because MSIE sometimes globs '*/*', pretending to
3723         # support xhtml+xml but choking when it gets what it asked for.
3724         if (defined $cgi->http('HTTP_ACCEPT') &&
3725             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3726             $cgi->Accept('application/xhtml+xml') != 0) {
3727                 return 'application/xhtml+xml';
3728         } else {
3729                 return 'text/html';
3730         }
3731 }
3732
3733 sub print_feed_meta {
3734         if (defined $project) {
3735                 my %href_params = get_feed_info();
3736                 if (!exists $href_params{'-title'}) {
3737                         $href_params{'-title'} = 'log';
3738                 }
3739
3740                 foreach my $format (qw(RSS Atom)) {
3741                         my $type = lc($format);
3742                         my %link_attr = (
3743                                 '-rel' => 'alternate',
3744                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3745                                 '-type' => "application/$type+xml"
3746                         );
3747
3748                         $href_params{'action'} = $type;
3749                         $link_attr{'-href'} = href(%href_params);
3750                         print "<link ".
3751                               "rel=\"$link_attr{'-rel'}\" ".
3752                               "title=\"$link_attr{'-title'}\" ".
3753                               "href=\"$link_attr{'-href'}\" ".
3754                               "type=\"$link_attr{'-type'}\" ".
3755                               "/>\n";
3756
3757                         $href_params{'extra_options'} = '--no-merges';
3758                         $link_attr{'-href'} = href(%href_params);
3759                         $link_attr{'-title'} .= ' (no merges)';
3760                         print "<link ".
3761                               "rel=\"$link_attr{'-rel'}\" ".
3762                               "title=\"$link_attr{'-title'}\" ".
3763                               "href=\"$link_attr{'-href'}\" ".
3764                               "type=\"$link_attr{'-type'}\" ".
3765                               "/>\n";
3766                 }
3767
3768         } else {
3769                 printf('<link rel="alternate" title="%s projects list" '.
3770                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3771                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3772                 printf('<link rel="alternate" title="%s projects feeds" '.
3773                        'href="%s" type="text/x-opml" />'."\n",
3774                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3775         }
3776 }
3777
3778 sub print_header_links {
3779         my $status = shift;
3780
3781         # print out each stylesheet that exist, providing backwards capability
3782         # for those people who defined $stylesheet in a config file
3783         if (defined $stylesheet) {
3784                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3785         } else {
3786                 foreach my $stylesheet (@stylesheets) {
3787                         next unless $stylesheet;
3788                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3789                 }
3790         }
3791         print_feed_meta()
3792                 if ($status eq '200 OK');
3793         if (defined $favicon) {
3794                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3795         }
3796 }
3797
3798 sub print_nav_breadcrumbs {
3799         my %opts = @_;
3800
3801         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3802         if (defined $project) {
3803                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3804                 if (defined $action) {
3805                         my $action_print = $action ;
3806                         if (defined $opts{-action_extra}) {
3807                                 $action_print = $cgi->a({-href => href(action=>$action)},
3808                                         $action);
3809                         }
3810                         print " / $action_print";
3811                 }
3812                 if (defined $opts{-action_extra}) {
3813                         print " / $opts{-action_extra}";
3814                 }
3815                 print "\n";
3816         }
3817 }
3818
3819 sub print_search_form {
3820         if (!defined $searchtext) {
3821                 $searchtext = "";
3822         }
3823         my $search_hash;
3824         if (defined $hash_base) {
3825                 $search_hash = $hash_base;
3826         } elsif (defined $hash) {
3827                 $search_hash = $hash;
3828         } else {
3829                 $search_hash = "HEAD";
3830         }
3831         my $action = $my_uri;
3832         my $use_pathinfo = gitweb_check_feature('pathinfo');
3833         if ($use_pathinfo) {
3834                 $action .= "/".esc_url($project);
3835         }
3836         print $cgi->startform(-method => "get", -action => $action) .
3837               "<div class=\"search\">\n" .
3838               (!$use_pathinfo &&
3839               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3840               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3841               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3842               $cgi->popup_menu(-name => 'st', -default => 'commit',
3843                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3844               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3845               " search:\n",
3846               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3847               "<span title=\"Extended regular expression\">" .
3848               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3849                              -checked => $search_use_regexp) .
3850               "</span>" .
3851               "</div>" .
3852               $cgi->end_form() . "\n";
3853 }
3854
3855 sub git_header_html {
3856         my $status = shift || "200 OK";
3857         my $expires = shift;
3858         my %opts = @_;
3859
3860         my $title = get_page_title();
3861         my $content_type = get_content_type_html();
3862         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3863                            -status=> $status, -expires => $expires)
3864                 unless ($opts{'-no_http_header'});
3865         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3866         print <<EOF;
3867 <?xml version="1.0" encoding="utf-8"?>
3868 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3869 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3870 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3871 <!-- git core binaries version $git_version -->
3872 <head>
3873 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3874 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3875 <meta name="robots" content="index, nofollow"/>
3876 <title>$title</title>
3877 EOF
3878         # the stylesheet, favicon etc urls won't work correctly with path_info
3879         # unless we set the appropriate base URL
3880         if ($ENV{'PATH_INFO'}) {
3881                 print "<base href=\"".esc_url($base_url)."\" />\n";
3882         }
3883         print_header_links($status);
3884
3885         if (defined $site_html_head_string) {
3886                 print to_utf8($site_html_head_string);
3887         }
3888
3889         print "</head>\n" .
3890               "<body>\n";
3891
3892         if (defined $site_header && -f $site_header) {
3893                 insert_file($site_header);
3894         }
3895
3896         print "<div class=\"page_header\">\n";
3897         if (defined $logo) {
3898                 print $cgi->a({-href => esc_url($logo_url),
3899                                -title => $logo_label},
3900                               $cgi->img({-src => esc_url($logo),
3901                                          -width => 72, -height => 27,
3902                                          -alt => "git",
3903                                          -class => "logo"}));
3904         }
3905         print_nav_breadcrumbs(%opts);
3906         print "</div>\n";
3907
3908         my $have_search = gitweb_check_feature('search');
3909         if (defined $project && $have_search) {
3910                 print_search_form();
3911         }
3912 }
3913
3914 sub git_footer_html {
3915         my $feed_class = 'rss_logo';
3916
3917         print "<div class=\"page_footer\">\n";
3918         if (defined $project) {
3919                 my $descr = git_get_project_description($project);
3920                 if (defined $descr) {
3921                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3922                 }
3923
3924                 my %href_params = get_feed_info();
3925                 if (!%href_params) {
3926                         $feed_class .= ' generic';
3927                 }
3928                 $href_params{'-title'} ||= 'log';
3929
3930                 foreach my $format (qw(RSS Atom)) {
3931                         $href_params{'action'} = lc($format);
3932                         print $cgi->a({-href => href(%href_params),
3933                                       -title => "$href_params{'-title'} $format feed",
3934                                       -class => $feed_class}, $format)."\n";
3935                 }
3936
3937         } else {
3938                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3939                               -class => $feed_class}, "OPML") . " ";
3940                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3941                               -class => $feed_class}, "TXT") . "\n";
3942         }
3943         print "</div>\n"; # class="page_footer"
3944
3945         if (defined $t0 && gitweb_check_feature('timed')) {
3946                 print "<div id=\"generating_info\">\n";
3947                 print 'This page took '.
3948                       '<span id="generating_time" class="time_span">'.
3949                       tv_interval($t0, [ gettimeofday() ]).
3950                       ' seconds </span>'.
3951                       ' and '.
3952                       '<span id="generating_cmd">'.
3953                       $number_of_git_cmds.
3954                       '</span> git commands '.
3955                       " to generate.\n";
3956                 print "</div>\n"; # class="page_footer"
3957         }
3958
3959         if (defined $site_footer && -f $site_footer) {
3960                 insert_file($site_footer);
3961         }
3962
3963         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3964         if (defined $action &&
3965             $action eq 'blame_incremental') {
3966                 print qq!<script type="text/javascript">\n!.
3967                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3968                       qq!           "!. href() .qq!");\n!.
3969                       qq!</script>\n!;
3970         } else {
3971                 my ($jstimezone, $tz_cookie, $datetime_class) =
3972                         gitweb_get_feature('javascript-timezone');
3973
3974                 print qq!<script type="text/javascript">\n!.
3975                       qq!window.onload = function () {\n!;
3976                 if (gitweb_check_feature('javascript-actions')) {
3977                         print qq!       fixLinks();\n!;
3978                 }
3979                 if ($jstimezone && $tz_cookie && $datetime_class) {
3980                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
3981                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
3982                 }
3983                 print qq!};\n!.
3984                       qq!</script>\n!;
3985         }
3986
3987         print "</body>\n" .
3988               "</html>";
3989 }
3990
3991 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3992 # Example: die_error(404, 'Hash not found')
3993 # By convention, use the following status codes (as defined in RFC 2616):
3994 # 400: Invalid or missing CGI parameters, or
3995 #      requested object exists but has wrong type.
3996 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3997 #      this server or project.
3998 # 404: Requested object/revision/project doesn't exist.
3999 # 500: The server isn't configured properly, or
4000 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4001 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4002 # 503: The server is currently unavailable (because it is overloaded,
4003 #      or down for maintenance).  Generally, this is a temporary state.
4004 sub die_error {
4005         my $status = shift || 500;
4006         my $error = esc_html(shift) || "Internal Server Error";
4007         my $extra = shift;
4008         my %opts = @_;
4009
4010         my %http_responses = (
4011                 400 => '400 Bad Request',
4012                 403 => '403 Forbidden',
4013                 404 => '404 Not Found',
4014                 500 => '500 Internal Server Error',
4015                 503 => '503 Service Unavailable',
4016         );
4017         git_header_html($http_responses{$status}, undef, %opts);
4018         print <<EOF;
4019 <div class="page_body">
4020 <br /><br />
4021 $status - $error
4022 <br />
4023 EOF
4024         if (defined $extra) {
4025                 print "<hr />\n" .
4026                       "$extra\n";
4027         }
4028         print "</div>\n";
4029
4030         git_footer_html();
4031         goto DONE_GITWEB
4032                 unless ($opts{'-error_handler'});
4033 }
4034
4035 ## ----------------------------------------------------------------------
4036 ## functions printing or outputting HTML: navigation
4037
4038 sub git_print_page_nav {
4039         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4040         $extra = '' if !defined $extra; # pager or formats
4041
4042         my @navs = qw(summary shortlog log commit commitdiff tree);
4043         if ($suppress) {
4044                 @navs = grep { $_ ne $suppress } @navs;
4045         }
4046
4047         my %arg = map { $_ => {action=>$_} } @navs;
4048         if (defined $head) {
4049                 for (qw(commit commitdiff)) {
4050                         $arg{$_}{'hash'} = $head;
4051                 }
4052                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4053                         for (qw(shortlog log)) {
4054                                 $arg{$_}{'hash'} = $head;
4055                         }
4056                 }
4057         }
4058
4059         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4060         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4061
4062         my @actions = gitweb_get_feature('actions');
4063         my %repl = (
4064                 '%' => '%',
4065                 'n' => $project,         # project name
4066                 'f' => $git_dir,         # project path within filesystem
4067                 'h' => $treehead || '',  # current hash ('h' parameter)
4068                 'b' => $treebase || '',  # hash base ('hb' parameter)
4069         );
4070         while (@actions) {
4071                 my ($label, $link, $pos) = splice(@actions,0,3);
4072                 # insert
4073                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4074                 # munch munch
4075                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4076                 $arg{$label}{'_href'} = $link;
4077         }
4078
4079         print "<div class=\"page_nav\">\n" .
4080                 (join " | ",
4081                  map { $_ eq $current ?
4082                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4083                  } @navs);
4084         print "<br/>\n$extra<br/>\n" .
4085               "</div>\n";
4086 }
4087
4088 # returns a submenu for the nagivation of the refs views (tags, heads,
4089 # remotes) with the current view disabled and the remotes view only
4090 # available if the feature is enabled
4091 sub format_ref_views {
4092         my ($current) = @_;
4093         my @ref_views = qw{tags heads};
4094         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4095         return join " | ", map {
4096                 $_ eq $current ? $_ :
4097                 $cgi->a({-href => href(action=>$_)}, $_)
4098         } @ref_views
4099 }
4100
4101 sub format_paging_nav {
4102         my ($action, $page, $has_next_link) = @_;
4103         my $paging_nav;
4104
4105
4106         if ($page > 0) {
4107                 $paging_nav .=
4108                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4109                         " &sdot; " .
4110                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4111                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4112         } else {
4113                 $paging_nav .= "first &sdot; prev";
4114         }
4115
4116         if ($has_next_link) {
4117                 $paging_nav .= " &sdot; " .
4118                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4119                                  -accesskey => "n", -title => "Alt-n"}, "next");
4120         } else {
4121                 $paging_nav .= " &sdot; next";
4122         }
4123
4124         return $paging_nav;
4125 }
4126
4127 ## ......................................................................
4128 ## functions printing or outputting HTML: div
4129
4130 sub git_print_header_div {
4131         my ($action, $title, $hash, $hash_base) = @_;
4132         my %args = ();
4133
4134         $args{'action'} = $action;
4135         $args{'hash'} = $hash if $hash;
4136         $args{'hash_base'} = $hash_base if $hash_base;
4137
4138         print "<div class=\"header\">\n" .
4139               $cgi->a({-href => href(%args), -class => "title"},
4140               $title ? $title : $action) .
4141               "\n</div>\n";
4142 }
4143
4144 sub format_repo_url {
4145         my ($name, $url) = @_;
4146         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4147 }
4148
4149 # Group output by placing it in a DIV element and adding a header.
4150 # Options for start_div() can be provided by passing a hash reference as the
4151 # first parameter to the function.
4152 # Options to git_print_header_div() can be provided by passing an array
4153 # reference. This must follow the options to start_div if they are present.
4154 # The content can be a scalar, which is output as-is, a scalar reference, which
4155 # is output after html escaping, an IO handle passed either as *handle or
4156 # *handle{IO}, or a function reference. In the latter case all following
4157 # parameters will be taken as argument to the content function call.
4158 sub git_print_section {
4159         my ($div_args, $header_args, $content);
4160         my $arg = shift;
4161         if (ref($arg) eq 'HASH') {
4162                 $div_args = $arg;
4163                 $arg = shift;
4164         }
4165         if (ref($arg) eq 'ARRAY') {
4166                 $header_args = $arg;
4167                 $arg = shift;
4168         }
4169         $content = $arg;
4170
4171         print $cgi->start_div($div_args);
4172         git_print_header_div(@$header_args);
4173
4174         if (ref($content) eq 'CODE') {
4175                 $content->(@_);
4176         } elsif (ref($content) eq 'SCALAR') {
4177                 print esc_html($$content);
4178         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4179                 print <$content>;
4180         } elsif (!ref($content) && defined($content)) {
4181                 print $content;
4182         }
4183
4184         print $cgi->end_div;
4185 }
4186
4187 sub format_timestamp_html {
4188         my $date = shift;
4189         my $strtime = $date->{'rfc2822'};
4190
4191         my (undef, undef, $datetime_class) =
4192                 gitweb_get_feature('javascript-timezone');
4193         if ($datetime_class) {
4194                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4195         }
4196
4197         my $localtime_format = '(%02d:%02d %s)';
4198         if ($date->{'hour_local'} < 6) {
4199                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4200         }
4201         $strtime .= ' ' .
4202                     sprintf($localtime_format,
4203                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4204
4205         return $strtime;
4206 }
4207
4208 # Outputs the author name and date in long form
4209 sub git_print_authorship {
4210         my $co = shift;
4211         my %opts = @_;
4212         my $tag = $opts{-tag} || 'div';
4213         my $author = $co->{'author_name'};
4214
4215         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4216         print "<$tag class=\"author_date\">" .
4217               format_search_author($author, "author", esc_html($author)) .
4218               " [".format_timestamp_html(\%ad)."]".
4219               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4220               "</$tag>\n";
4221 }
4222
4223 # Outputs table rows containing the full author or committer information,
4224 # in the format expected for 'commit' view (& similar).
4225 # Parameters are a commit hash reference, followed by the list of people
4226 # to output information for. If the list is empty it defaults to both
4227 # author and committer.
4228 sub git_print_authorship_rows {
4229         my $co = shift;
4230         # too bad we can't use @people = @_ || ('author', 'committer')
4231         my @people = @_;
4232         @people = ('author', 'committer') unless @people;
4233         foreach my $who (@people) {
4234                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4235                 print "<tr><td>$who</td><td>" .
4236                       format_search_author($co->{"${who}_name"}, $who,
4237                                            esc_html($co->{"${who}_name"})) . " " .
4238                       format_search_author($co->{"${who}_email"}, $who,
4239                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4240                       "</td><td rowspan=\"2\">" .
4241                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4242                       "</td></tr>\n" .
4243                       "<tr>" .
4244                       "<td></td><td>" .
4245                       format_timestamp_html(\%wd) .
4246                       "</td>" .
4247                       "</tr>\n";
4248         }
4249 }
4250
4251 sub git_print_page_path {
4252         my $name = shift;
4253         my $type = shift;
4254         my $hb = shift;
4255
4256
4257         print "<div class=\"page_path\">";
4258         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4259                       -title => 'tree root'}, to_utf8("[$project]"));
4260         print " / ";
4261         if (defined $name) {
4262                 my @dirname = split '/', $name;
4263                 my $basename = pop @dirname;
4264                 my $fullname = '';
4265
4266                 foreach my $dir (@dirname) {
4267                         $fullname .= ($fullname ? '/' : '') . $dir;
4268                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4269                                                      hash_base=>$hb),
4270                                       -title => $fullname}, esc_path($dir));
4271                         print " / ";
4272                 }
4273                 if (defined $type && $type eq 'blob') {
4274                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4275                                                      hash_base=>$hb),
4276                                       -title => $name}, esc_path($basename));
4277                         if (gitweb_check_feature('highlight')) {
4278                                 print '&nbsp;&nbsp;&nbsp;&nbsp;
4279 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4280 <script>
4281 function toggleLineNumbers() {
4282         e = document.getElementById("lineNoStyle");
4283         e2 = document.getElementById("lineNoToggle");
4284         if (e2.innerHTML == "[Hide line numbers]") {
4285                 e.innerHTML = ".linenr { display:none; }";
4286                 e2.innerHTML = "[Show line numbers]";
4287         }
4288         else {
4289                 e.innerHTML = "";
4290                 e2.innerHTML = "[Hide line numbers]";
4291         }
4292 }
4293 var style = document.createElement("style");
4294 style.setAttribute("id", "lineNoStyle");
4295 document.getElementsByTagName("head")[0].appendChild(style);
4296 toggleLineNumbers();
4297 </script>
4298 ';
4299                         }
4300                 } elsif (defined $type && $type eq 'tree') {
4301                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4302                                                      hash_base=>$hb),
4303                                       -title => $name}, esc_path($basename));
4304                         print " / ";
4305                 } else {
4306                         print esc_path($basename);
4307                 }
4308         }
4309         print "<br/></div>\n";
4310 }
4311
4312 sub git_print_log {
4313         my $log = shift;
4314         my %opts = @_;
4315
4316         if ($opts{'-remove_title'}) {
4317                 # remove title, i.e. first line of log
4318                 shift @$log;
4319         }
4320         # remove leading empty lines
4321         while (defined $log->[0] && $log->[0] eq "") {
4322                 shift @$log;
4323         }
4324
4325         # print log
4326         my $signoff = 0;
4327         my $empty = 0;
4328         foreach my $line (@$log) {
4329                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4330                         $signoff = 1;
4331                         $empty = 0;
4332                         if (! $opts{'-remove_signoff'}) {
4333                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4334                                 next;
4335                         } else {
4336                                 # remove signoff lines
4337                                 next;
4338                         }
4339                 } else {
4340                         $signoff = 0;
4341                 }
4342
4343                 # print only one empty line
4344                 # do not print empty line after signoff
4345                 if ($line eq "") {
4346                         next if ($empty || $signoff);
4347                         $empty = 1;
4348                 } else {
4349                         $empty = 0;
4350                 }
4351
4352                 print format_log_line_html($line) . "<br/>\n";
4353         }
4354
4355         if ($opts{'-final_empty_line'}) {
4356                 # end with single empty line
4357                 print "<br/>\n" unless $empty;
4358         }
4359 }
4360
4361 # return link target (what link points to)
4362 sub git_get_link_target {
4363         my $hash = shift;
4364         my $link_target;
4365
4366         # read link
4367         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4368                 or return;
4369         {
4370                 local $/ = undef;
4371                 $link_target = <$fd>;
4372         }
4373         close $fd
4374                 or return;
4375
4376         return $link_target;
4377 }
4378
4379 # given link target, and the directory (basedir) the link is in,
4380 # return target of link relative to top directory (top tree);
4381 # return undef if it is not possible (including absolute links).
4382 sub normalize_link_target {
4383         my ($link_target, $basedir) = @_;
4384
4385         # absolute symlinks (beginning with '/') cannot be normalized
4386         return if (substr($link_target, 0, 1) eq '/');
4387
4388         # normalize link target to path from top (root) tree (dir)
4389         my $path;
4390         if ($basedir) {
4391                 $path = $basedir . '/' . $link_target;
4392         } else {
4393                 # we are in top (root) tree (dir)
4394                 $path = $link_target;
4395         }
4396
4397         # remove //, /./, and /../
4398         my @path_parts;
4399         foreach my $part (split('/', $path)) {
4400                 # discard '.' and ''
4401                 next if (!$part || $part eq '.');
4402                 # handle '..'
4403                 if ($part eq '..') {
4404                         if (@path_parts) {
4405                                 pop @path_parts;
4406                         } else {
4407                                 # link leads outside repository (outside top dir)
4408                                 return;
4409                         }
4410                 } else {
4411                         push @path_parts, $part;
4412                 }
4413         }
4414         $path = join('/', @path_parts);
4415
4416         return $path;
4417 }
4418
4419 # print tree entry (row of git_tree), but without encompassing <tr> element
4420 sub git_print_tree_entry {
4421         my ($t, $basedir, $hash_base, $have_blame) = @_;
4422
4423         my %base_key = ();
4424         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4425
4426         # The format of a table row is: mode list link.  Where mode is
4427         # the mode of the entry, list is the name of the entry, an href,
4428         # and link is the action links of the entry.
4429
4430         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4431         if (exists $t->{'size'}) {
4432                 print "<td class=\"size\">$t->{'size'}</td>\n";
4433         }
4434         if ($t->{'type'} eq "blob") {
4435                 print "<td class=\"list\">" .
4436                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4437                                                file_name=>"$basedir$t->{'name'}", %base_key),
4438                                 -class => "list"}, esc_path($t->{'name'}));
4439                 if (S_ISLNK(oct $t->{'mode'})) {
4440                         my $link_target = git_get_link_target($t->{'hash'});
4441                         if ($link_target) {
4442                                 my $norm_target = normalize_link_target($link_target, $basedir);
4443                                 if (defined $norm_target) {
4444                                         print " -> " .
4445                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4446                                                                      file_name=>$norm_target),
4447                                                        -title => $norm_target}, esc_path($link_target));
4448                                 } else {
4449                                         print " -> " . esc_path($link_target);
4450                                 }
4451                         }
4452                 }
4453                 print "</td>\n";
4454                 print "<td class=\"link\">";
4455                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4456                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4457                               "blob");
4458                 if ($have_blame) {
4459                         print " | " .
4460                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4461                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4462                                       "blame");
4463                 }
4464                 if (defined $hash_base) {
4465                         print " | " .
4466                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4467                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4468                                       "history");
4469                 }
4470                 print " | " .
4471                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4472                                                file_name=>"$basedir$t->{'name'}")},
4473                                 "raw");
4474                 print "</td>\n";
4475
4476         } elsif ($t->{'type'} eq "tree") {
4477                 print "<td class=\"list\">";
4478                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4479                                              file_name=>"$basedir$t->{'name'}",
4480                                              %base_key)},
4481                               esc_path($t->{'name'}));
4482                 print "</td>\n";
4483                 print "<td class=\"link\">";
4484                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4485                                              file_name=>"$basedir$t->{'name'}",
4486                                              %base_key)},
4487                               "tree");
4488                 if (defined $hash_base) {
4489                         print " | " .
4490                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4491                                                      file_name=>"$basedir$t->{'name'}")},
4492                                       "history");
4493                 }
4494                 print "</td>\n";
4495         } else {
4496                 # unknown object: we can only present history for it
4497                 # (this includes 'commit' object, i.e. submodule support)
4498                 print "<td class=\"list\">" .
4499                       esc_path($t->{'name'}) .
4500                       "</td>\n";
4501                 print "<td class=\"link\">";
4502                 if (defined $hash_base) {
4503                         print $cgi->a({-href => href(action=>"history",
4504                                                      hash_base=>$hash_base,
4505                                                      file_name=>"$basedir$t->{'name'}")},
4506                                       "history");
4507                 }
4508                 print "</td>\n";
4509         }
4510 }
4511
4512 ## ......................................................................
4513 ## functions printing large fragments of HTML
4514
4515 # get pre-image filenames for merge (combined) diff
4516 sub fill_from_file_info {
4517         my ($diff, @parents) = @_;
4518
4519         $diff->{'from_file'} = [ ];
4520         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4521         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4522                 if ($diff->{'status'}[$i] eq 'R' ||
4523                     $diff->{'status'}[$i] eq 'C') {
4524                         $diff->{'from_file'}[$i] =
4525                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4526                 }
4527         }
4528
4529         return $diff;
4530 }
4531
4532 # is current raw difftree line of file deletion
4533 sub is_deleted {
4534         my $diffinfo = shift;
4535
4536         return $diffinfo->{'to_id'} eq ('0' x 40);
4537 }
4538
4539 # does patch correspond to [previous] difftree raw line
4540 # $diffinfo  - hashref of parsed raw diff format
4541 # $patchinfo - hashref of parsed patch diff format
4542 #              (the same keys as in $diffinfo)
4543 sub is_patch_split {
4544         my ($diffinfo, $patchinfo) = @_;
4545
4546         return defined $diffinfo && defined $patchinfo
4547                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4548 }
4549
4550
4551 sub git_difftree_body {
4552         my ($difftree, $hash, @parents) = @_;
4553         my ($parent) = $parents[0];
4554         my $have_blame = gitweb_check_feature('blame');
4555         print "<div class=\"list_head\">\n";
4556         if ($#{$difftree} > 10) {
4557                 print(($#{$difftree} + 1) . " files changed:\n");
4558         }
4559         print "</div>\n";
4560
4561         print "<table class=\"" .
4562               (@parents > 1 ? "combined " : "") .
4563               "diff_tree\">\n";
4564
4565         # header only for combined diff in 'commitdiff' view
4566         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4567         if ($has_header) {
4568                 # table header
4569                 print "<thead><tr>\n" .
4570                        "<th></th><th></th>\n"; # filename, patchN link
4571                 for (my $i = 0; $i < @parents; $i++) {
4572                         my $par = $parents[$i];
4573                         print "<th>" .
4574                               $cgi->a({-href => href(action=>"commitdiff",
4575                                                      hash=>$hash, hash_parent=>$par),
4576                                        -title => 'commitdiff to parent number ' .
4577                                                   ($i+1) . ': ' . substr($par,0,7)},
4578                                       $i+1) .
4579                               "&nbsp;</th>\n";
4580                 }
4581                 print "</tr></thead>\n<tbody>\n";
4582         }
4583
4584         my $alternate = 1;
4585         my $patchno = 0;
4586         foreach my $line (@{$difftree}) {
4587                 my $diff = parsed_difftree_line($line);
4588
4589                 if ($alternate) {
4590                         print "<tr class=\"dark\">\n";
4591                 } else {
4592                         print "<tr class=\"light\">\n";
4593                 }
4594                 $alternate ^= 1;
4595
4596                 if (exists $diff->{'nparents'}) { # combined diff
4597
4598                         fill_from_file_info($diff, @parents)
4599                                 unless exists $diff->{'from_file'};
4600
4601                         if (!is_deleted($diff)) {
4602                                 # file exists in the result (child) commit
4603                                 print "<td>" .
4604                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4605                                                              file_name=>$diff->{'to_file'},
4606                                                              hash_base=>$hash),
4607                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4608                                       "</td>\n";
4609                         } else {
4610                                 print "<td>" .
4611                                       esc_path($diff->{'to_file'}) .
4612                                       "</td>\n";
4613                         }
4614
4615                         if ($action eq 'commitdiff') {
4616                                 # link to patch
4617                                 $patchno++;
4618                                 print "<td class=\"link\">" .
4619                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4620                                               "patch") .
4621                                       " | " .
4622                                       "</td>\n";
4623                         }
4624
4625                         my $has_history = 0;
4626                         my $not_deleted = 0;
4627                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4628                                 my $hash_parent = $parents[$i];
4629                                 my $from_hash = $diff->{'from_id'}[$i];
4630                                 my $from_path = $diff->{'from_file'}[$i];
4631                                 my $status = $diff->{'status'}[$i];
4632
4633                                 $has_history ||= ($status ne 'A');
4634                                 $not_deleted ||= ($status ne 'D');
4635
4636                                 if ($status eq 'A') {
4637                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4638                                 } elsif ($status eq 'D') {
4639                                         print "<td class=\"link\">" .
4640                                               $cgi->a({-href => href(action=>"blob",
4641                                                                      hash_base=>$hash,
4642                                                                      hash=>$from_hash,
4643                                                                      file_name=>$from_path)},
4644                                                       "blob" . ($i+1)) .
4645                                               " | </td>\n";
4646                                 } else {
4647                                         if ($diff->{'to_id'} eq $from_hash) {
4648                                                 print "<td class=\"link nochange\">";
4649                                         } else {
4650                                                 print "<td class=\"link\">";
4651                                         }
4652                                         print $cgi->a({-href => href(action=>"blobdiff",
4653                                                                      hash=>$diff->{'to_id'},
4654                                                                      hash_parent=>$from_hash,
4655                                                                      hash_base=>$hash,
4656                                                                      hash_parent_base=>$hash_parent,
4657                                                                      file_name=>$diff->{'to_file'},
4658                                                                      file_parent=>$from_path)},
4659                                                       "diff" . ($i+1)) .
4660                                               " | </td>\n";
4661                                 }
4662                         }
4663
4664                         print "<td class=\"link\">";
4665                         if ($not_deleted) {
4666                                 print $cgi->a({-href => href(action=>"blob",
4667                                                              hash=>$diff->{'to_id'},
4668                                                              file_name=>$diff->{'to_file'},
4669                                                              hash_base=>$hash)},
4670                                               "blob");
4671                                 print " | " if ($has_history);
4672                         }
4673                         if ($has_history) {
4674                                 print $cgi->a({-href => href(action=>"history",
4675                                                              file_name=>$diff->{'to_file'},
4676                                                              hash_base=>$hash)},
4677                                               "history");
4678                         }
4679                         print "</td>\n";
4680
4681                         print "</tr>\n";
4682                         next; # instead of 'else' clause, to avoid extra indent
4683                 }
4684                 # else ordinary diff
4685
4686                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4687                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4688                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4689                         $to_mode_oct = oct $diff->{'to_mode'};
4690                         if (S_ISREG($to_mode_oct)) { # only for regular file
4691                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4692                         }
4693                         $to_file_type = file_type($diff->{'to_mode'});
4694                 }
4695                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4696                         $from_mode_oct = oct $diff->{'from_mode'};
4697                         if (S_ISREG($from_mode_oct)) { # only for regular file
4698                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4699                         }
4700                         $from_file_type = file_type($diff->{'from_mode'});
4701                 }
4702
4703                 if ($diff->{'status'} eq "A") { # created
4704                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4705                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4706                         $mode_chng   .= "]</span>";
4707                         print "<td>";
4708                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4709                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4710                                       -class => "list"}, esc_path($diff->{'file'}));
4711                         print "</td>\n";
4712                         print "<td>$mode_chng</td>\n";
4713                         print "<td class=\"link\">";
4714                         if ($action eq 'commitdiff') {
4715                                 # link to patch
4716                                 $patchno++;
4717                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4718                                               "patch") .
4719                                       " | ";
4720                         }
4721                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4722                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4723                                       "blob");
4724                         print "</td>\n";
4725
4726                 } elsif ($diff->{'status'} eq "D") { # deleted
4727                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4728                         print "<td>";
4729                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4730                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4731                                        -class => "list"}, esc_path($diff->{'file'}));
4732                         print "</td>\n";
4733                         print "<td>$mode_chng</td>\n";
4734                         print "<td class=\"link\">";
4735                         if ($action eq 'commitdiff') {
4736                                 # link to patch
4737                                 $patchno++;
4738                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4739                                               "patch") .
4740                                       " | ";
4741                         }
4742                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4743                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4744                                       "blob") . " | ";
4745                         if ($have_blame) {
4746                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4747                                                              file_name=>$diff->{'file'})},
4748                                               "blame") . " | ";
4749                         }
4750                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4751                                                      file_name=>$diff->{'file'})},
4752                                       "history");
4753                         print "</td>\n";
4754
4755                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4756                         my $mode_chnge = "";
4757                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4758                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4759                                 if ($from_file_type ne $to_file_type) {
4760                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4761                                 }
4762                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4763                                         if ($from_mode_str && $to_mode_str) {
4764                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4765                                         } elsif ($to_mode_str) {
4766                                                 $mode_chnge .= " mode: $to_mode_str";
4767                                         }
4768                                 }
4769                                 $mode_chnge .= "]</span>\n";
4770                         }
4771                         print "<td>";
4772                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4773                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4774                                       -class => "list"}, esc_path($diff->{'file'}));
4775                         print "</td>\n";
4776                         print "<td>$mode_chnge</td>\n";
4777                         print "<td class=\"link\">";
4778                         if ($action eq 'commitdiff') {
4779                                 # link to patch
4780                                 $patchno++;
4781                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4782                                               "patch") .
4783                                       " | ";
4784                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4785                                 # "commit" view and modified file (not onlu mode changed)
4786                                 print $cgi->a({-href => href(action=>"blobdiff",
4787                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4788                                                              hash_base=>$hash, hash_parent_base=>$parent,
4789                                                              file_name=>$diff->{'file'})},
4790                                               "diff") .
4791                                       " | ";
4792                         }
4793                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4794                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4795                                        "blob") . " | ";
4796                         if ($have_blame) {
4797                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4798                                                              file_name=>$diff->{'file'})},
4799                                               "blame") . " | ";
4800                         }
4801                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4802                                                      file_name=>$diff->{'file'})},
4803                                       "history");
4804                         print "</td>\n";
4805
4806                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4807                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4808                         my $nstatus = $status_name{$diff->{'status'}};
4809                         my $mode_chng = "";
4810                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4811                                 # mode also for directories, so we cannot use $to_mode_str
4812                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4813                         }
4814                         print "<td>" .
4815                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4816                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4817                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4818                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4819                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4820                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4821                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4822                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4823                               "<td class=\"link\">";
4824                         if ($action eq 'commitdiff') {
4825                                 # link to patch
4826                                 $patchno++;
4827                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4828                                               "patch") .
4829                                       " | ";
4830                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4831                                 # "commit" view and modified file (not only pure rename or copy)
4832                                 print $cgi->a({-href => href(action=>"blobdiff",
4833                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4834                                                              hash_base=>$hash, hash_parent_base=>$parent,
4835                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4836                                               "diff") .
4837                                       " | ";
4838                         }
4839                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4840                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4841                                       "blob") . " | ";
4842                         if ($have_blame) {
4843                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4844                                                              file_name=>$diff->{'to_file'})},
4845                                               "blame") . " | ";
4846                         }
4847                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4848                                                     file_name=>$diff->{'to_file'})},
4849                                       "history");
4850                         print "</td>\n";
4851
4852                 } # we should not encounter Unmerged (U) or Unknown (X) status
4853                 print "</tr>\n";
4854         }
4855         print "</tbody>" if $has_header;
4856         print "</table>\n";
4857 }
4858
4859 sub git_patchset_body {
4860         my ($fd, $difftree, $hash, @hash_parents) = @_;
4861         my ($hash_parent) = $hash_parents[0];
4862
4863         my $is_combined = (@hash_parents > 1);
4864         my $patch_idx = 0;
4865         my $patch_number = 0;
4866         my $patch_line;
4867         my $diffinfo;
4868         my $to_name;
4869         my (%from, %to);
4870
4871         print "<div class=\"patchset\">\n";
4872
4873         # skip to first patch
4874         while ($patch_line = <$fd>) {
4875                 chomp $patch_line;
4876
4877                 last if ($patch_line =~ m/^diff /);
4878         }
4879
4880  PATCH:
4881         while ($patch_line) {
4882
4883                 # parse "git diff" header line
4884                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4885                         # $1 is from_name, which we do not use
4886                         $to_name = unquote($2);
4887                         $to_name =~ s!^b/!!;
4888                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4889                         # $1 is 'cc' or 'combined', which we do not use
4890                         $to_name = unquote($2);
4891                 } else {
4892                         $to_name = undef;
4893                 }
4894
4895                 # check if current patch belong to current raw line
4896                 # and parse raw git-diff line if needed
4897                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4898                         # this is continuation of a split patch
4899                         print "<div class=\"patch cont\">\n";
4900                 } else {
4901                         # advance raw git-diff output if needed
4902                         $patch_idx++ if defined $diffinfo;
4903
4904                         # read and prepare patch information
4905                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4906
4907                         # compact combined diff output can have some patches skipped
4908                         # find which patch (using pathname of result) we are at now;
4909                         if ($is_combined) {
4910                                 while ($to_name ne $diffinfo->{'to_file'}) {
4911                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4912                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4913                                               "</div>\n";  # class="patch"
4914
4915                                         $patch_idx++;
4916                                         $patch_number++;
4917
4918                                         last if $patch_idx > $#$difftree;
4919                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4920                                 }
4921                         }
4922
4923                         # modifies %from, %to hashes
4924                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4925
4926                         # this is first patch for raw difftree line with $patch_idx index
4927                         # we index @$difftree array from 0, but number patches from 1
4928                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4929                 }
4930
4931                 # git diff header
4932                 #assert($patch_line =~ m/^diff /) if DEBUG;
4933                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4934                 $patch_number++;
4935                 # print "git diff" header
4936                 print format_git_diff_header_line($patch_line, $diffinfo,
4937                                                   \%from, \%to);
4938
4939                 # print extended diff header
4940                 print "<div class=\"diff extended_header\">\n";
4941         EXTENDED_HEADER:
4942                 while ($patch_line = <$fd>) {
4943                         chomp $patch_line;
4944
4945                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4946
4947                         print format_extended_diff_header_line($patch_line, $diffinfo,
4948                                                                \%from, \%to);
4949                 }
4950                 print "</div>\n"; # class="diff extended_header"
4951
4952                 # from-file/to-file diff header
4953                 if (! $patch_line) {
4954                         print "</div>\n"; # class="patch"
4955                         last PATCH;
4956                 }
4957                 next PATCH if ($patch_line =~ m/^diff /);
4958                 #assert($patch_line =~ m/^---/) if DEBUG;
4959
4960                 my $last_patch_line = $patch_line;
4961                 $patch_line = <$fd>;
4962                 chomp $patch_line;
4963                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4964
4965                 print format_diff_from_to_header($last_patch_line, $patch_line,
4966                                                  $diffinfo, \%from, \%to,
4967                                                  @hash_parents);
4968
4969                 # the patch itself
4970         LINE:
4971                 while ($patch_line = <$fd>) {
4972                         chomp $patch_line;
4973
4974                         next PATCH if ($patch_line =~ m/^diff /);
4975
4976                         print format_diff_line($patch_line, \%from, \%to);
4977                 }
4978
4979         } continue {
4980                 print "</div>\n"; # class="patch"
4981         }
4982
4983         # for compact combined (--cc) format, with chunk and patch simplification
4984         # the patchset might be empty, but there might be unprocessed raw lines
4985         for (++$patch_idx if $patch_number > 0;
4986              $patch_idx < @$difftree;
4987              ++$patch_idx) {
4988                 # read and prepare patch information
4989                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4990
4991                 # generate anchor for "patch" links in difftree / whatchanged part
4992                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4993                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4994                       "</div>\n";  # class="patch"
4995
4996                 $patch_number++;
4997         }
4998
4999         if ($patch_number == 0) {
5000                 if (@hash_parents > 1) {
5001                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5002                 } else {
5003                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5004                 }
5005         }
5006
5007         print "</div>\n"; # class="patchset"
5008 }
5009
5010 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5011
5012 # fills project list info (age, description, owner, category, forks)
5013 # for each project in the list, removing invalid projects from
5014 # returned list
5015 # NOTE: modifies $projlist, but does not remove entries from it
5016 sub fill_project_list_info {
5017         my $projlist = shift;
5018         my @projects;
5019
5020         my $show_ctags = gitweb_check_feature('ctags');
5021  PROJECT:
5022         foreach my $pr (@$projlist) {
5023                 my (@activity) = git_get_last_activity($pr->{'path'});
5024                 unless (@activity) {
5025                         next PROJECT;
5026                 }
5027                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5028                 if (!defined $pr->{'descr'}) {
5029                         my $descr = git_get_project_description($pr->{'path'}) || "";
5030                         $descr = to_utf8($descr);
5031                         $pr->{'descr_long'} = $descr;
5032                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5033                 }
5034                 if (!defined $pr->{'owner'}) {
5035                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5036                 }
5037                 if ($show_ctags) {
5038                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5039                 }
5040                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5041                         my $cat = git_get_project_category($pr->{'path'}) ||
5042                                                            $project_list_default_category;
5043                         $pr->{'category'} = to_utf8($cat);
5044                 }
5045
5046                 push @projects, $pr;
5047         }
5048
5049         return @projects;
5050 }
5051
5052 sub sort_projects_list {
5053         my ($projlist, $order) = @_;
5054         my @projects;
5055
5056         my %order_info = (
5057                 project => { key => 'path', type => 'str' },
5058                 descr => { key => 'descr_long', type => 'str' },
5059                 owner => { key => 'owner', type => 'str' },
5060                 age => { key => 'age', type => 'num' }
5061         );
5062         my $oi = $order_info{$order};
5063         return @$projlist unless defined $oi;
5064         if ($oi->{'type'} eq 'str') {
5065                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5066         } else {
5067                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5068         }
5069
5070         return @projects;
5071 }
5072
5073 # returns a hash of categories, containing the list of project
5074 # belonging to each category
5075 sub build_projlist_by_category {
5076         my ($projlist, $from, $to) = @_;
5077         my %categories;
5078
5079         $from = 0 unless defined $from;
5080         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5081
5082         for (my $i = $from; $i <= $to; $i++) {
5083                 my $pr = $projlist->[$i];
5084                 push @{$categories{ $pr->{'category'} }}, $pr;
5085         }
5086
5087         return wantarray ? %categories : \%categories;
5088 }
5089
5090 # print 'sort by' <th> element, generating 'sort by $name' replay link
5091 # if that order is not selected
5092 sub print_sort_th {
5093         print format_sort_th(@_);
5094 }
5095
5096 sub format_sort_th {
5097         my ($name, $order, $header) = @_;
5098         my $sort_th = "";
5099         $header ||= ucfirst($name);
5100
5101         if ($order eq $name) {
5102                 $sort_th .= "<th>$header</th>\n";
5103         } else {
5104                 $sort_th .= "<th>" .
5105                             $cgi->a({-href => href(-replay=>1, order=>$name),
5106                                      -class => "header"}, $header) .
5107                             "</th>\n";
5108         }
5109
5110         return $sort_th;
5111 }
5112
5113 sub git_project_list_rows {
5114         my ($projlist, $from, $to, $check_forks) = @_;
5115
5116         $from = 0 unless defined $from;
5117         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5118
5119         my $alternate = 1;
5120         for (my $i = $from; $i <= $to; $i++) {
5121                 my $pr = $projlist->[$i];
5122
5123                 if ($alternate) {
5124                         print "<tr class=\"dark\">\n";
5125                 } else {
5126                         print "<tr class=\"light\">\n";
5127                 }
5128                 $alternate ^= 1;
5129
5130                 if ($check_forks) {
5131                         print "<td>";
5132                         if ($pr->{'forks'}) {
5133                                 my $nforks = scalar @{$pr->{'forks'}};
5134                                 if ($nforks > 0) {
5135                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5136                                                        -title => "$nforks forks"}, "+");
5137                                 } else {
5138                                         print $cgi->span({-title => "$nforks forks"}, "+");
5139                                 }
5140                         }
5141                         print "</td>\n";
5142                 }
5143                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5144                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5145                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5146                                         -class => "list", -title => $pr->{'descr_long'}},
5147                                         esc_html($pr->{'descr'})) . "</td>\n" .
5148                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5149                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5150                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5151                       "<td class=\"link\">" .
5152                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5153                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5154                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5155                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5156                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5157                       "</td>\n" .
5158                       "</tr>\n";
5159         }
5160 }
5161
5162 sub git_project_list_body {
5163         # actually uses global variable $project
5164         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5165         my @projects = @$projlist;
5166
5167         my $check_forks = gitweb_check_feature('forks');
5168         my $show_ctags  = gitweb_check_feature('ctags');
5169         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5170         $check_forks = undef
5171                 if ($tagfilter || $searchtext);
5172
5173         # filtering out forks before filling info allows to do less work
5174         @projects = filter_forks_from_projects_list(\@projects)
5175                 if ($check_forks);
5176         @projects = fill_project_list_info(\@projects);
5177         # searching projects require filling to be run before it
5178         @projects = search_projects_list(\@projects,
5179                                          'searchtext' => $searchtext,
5180                                          'tagfilter'  => $tagfilter)
5181                 if ($tagfilter || $searchtext);
5182
5183         $order ||= $default_projects_order;
5184         $from = 0 unless defined $from;
5185         $to = $#projects if (!defined $to || $#projects < $to);
5186
5187         # short circuit
5188         if ($from > $to) {
5189                 print "<center>\n".
5190                       "<b>No such projects found</b><br />\n".
5191                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5192                       "</center>\n<br />\n";
5193                 return;
5194         }
5195
5196         @projects = sort_projects_list(\@projects, $order);
5197
5198         if ($show_ctags) {
5199                 my $ctags = git_gather_all_ctags(\@projects);
5200                 my $cloud = git_populate_project_tagcloud($ctags);
5201                 print git_show_project_tagcloud($cloud, 64);
5202         }
5203
5204         print "<table class=\"project_list\">\n";
5205         unless ($no_header) {
5206                 print "<tr>\n";
5207                 if ($check_forks) {
5208                         print "<th></th>\n";
5209                 }
5210                 print_sort_th('project', $order, 'Project');
5211                 print_sort_th('descr', $order, 'Description');
5212                 print_sort_th('owner', $order, 'Owner');
5213                 print_sort_th('age', $order, 'Last Change');
5214                 print "<th></th>\n" . # for links
5215                       "</tr>\n";
5216         }
5217
5218         if ($projects_list_group_categories) {
5219                 # only display categories with projects in the $from-$to window
5220                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5221                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5222                 foreach my $cat (sort keys %categories) {
5223                         unless ($cat eq "") {
5224                                 print "<tr>\n";
5225                                 if ($check_forks) {
5226                                         print "<td></td>\n";
5227                                 }
5228                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5229                                 print "</tr>\n";
5230                         }
5231
5232                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5233                 }
5234         } else {
5235                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5236         }
5237
5238         if (defined $extra) {
5239                 print "<tr>\n";
5240                 if ($check_forks) {
5241                         print "<td></td>\n";
5242                 }
5243                 print "<td colspan=\"5\">$extra</td>\n" .
5244                       "</tr>\n";
5245         }
5246         print "</table>\n";
5247 }
5248
5249 sub git_log_body {
5250         # uses global variable $project
5251         my ($commitlist, $from, $to, $refs, $extra) = @_;
5252
5253         $from = 0 unless defined $from;
5254         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5255
5256         for (my $i = 0; $i <= $to; $i++) {
5257                 my %co = %{$commitlist->[$i]};
5258                 next if !%co;
5259                 my $commit = $co{'id'};
5260                 my $ref = format_ref_marker($refs, $commit);
5261                 git_print_header_div('commit',
5262                                "<span class=\"age\">$co{'age_string'}</span>" .
5263                                esc_html($co{'title'}) . $ref,
5264                                $commit);
5265                 print "<div class=\"title_text\">\n" .
5266                       "<div class=\"log_link\">\n" .
5267                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5268                       " | " .
5269                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5270                       " | " .
5271                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5272                       "<br/>\n" .
5273                       "</div>\n";
5274                       git_print_authorship(\%co, -tag => 'span');
5275                       print "<br/>\n</div>\n";
5276
5277                 print "<div class=\"log_body\">\n";
5278                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5279                 print "</div>\n";
5280         }
5281         if ($extra) {
5282                 print "<div class=\"page_nav\">\n";
5283                 print "$extra\n";
5284                 print "</div>\n";
5285         }
5286 }
5287
5288 sub git_shortlog_body {
5289         # uses global variable $project
5290         my ($commitlist, $from, $to, $refs, $extra) = @_;
5291
5292         $from = 0 unless defined $from;
5293         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5294
5295         print "<table class=\"shortlog\">\n";
5296         my $alternate = 1;
5297         for (my $i = $from; $i <= $to; $i++) {
5298                 my %co = %{$commitlist->[$i]};
5299                 my $commit = $co{'id'};
5300                 my $ref = format_ref_marker($refs, $commit);
5301                 if ($alternate) {
5302                         print "<tr class=\"dark\">\n";
5303                 } else {
5304                         print "<tr class=\"light\">\n";
5305                 }
5306                 $alternate ^= 1;
5307                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5308                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5309                       format_author_html('td', \%co, 10) . "<td>";
5310                 print format_subject_html($co{'title'}, $co{'title_short'},
5311                                           href(action=>"commit", hash=>$commit), $ref);
5312                 print "</td>\n" .
5313                       "<td class=\"link\">" .
5314                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5315                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5316                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5317                 my $snapshot_links = format_snapshot_links($commit);
5318                 if (defined $snapshot_links) {
5319                         print " | " . $snapshot_links;
5320                 }
5321                 print "</td>\n" .
5322                       "</tr>\n";
5323         }
5324         if (defined $extra) {
5325                 print "<tr>\n" .
5326                       "<td colspan=\"4\">$extra</td>\n" .
5327                       "</tr>\n";
5328         }
5329         print "</table>\n";
5330 }
5331
5332 sub git_history_body {
5333         # Warning: assumes constant type (blob or tree) during history
5334         my ($commitlist, $from, $to, $refs, $extra,
5335             $file_name, $file_hash, $ftype) = @_;
5336
5337         $from = 0 unless defined $from;
5338         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5339
5340         print "<table class=\"history\">\n";
5341         my $alternate = 1;
5342         for (my $i = $from; $i <= $to; $i++) {
5343                 my %co = %{$commitlist->[$i]};
5344                 if (!%co) {
5345                         next;
5346                 }
5347                 my $commit = $co{'id'};
5348
5349                 my $ref = format_ref_marker($refs, $commit);
5350
5351                 if ($alternate) {
5352                         print "<tr class=\"dark\">\n";
5353                 } else {
5354                         print "<tr class=\"light\">\n";
5355                 }
5356                 $alternate ^= 1;
5357                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5358         # shortlog:   format_author_html('td', \%co, 10)
5359                       format_author_html('td', \%co, 15, 3) . "<td>";
5360                 # originally git_history used chop_str($co{'title'}, 50)
5361                 print format_subject_html($co{'title'}, $co{'title_short'},
5362                                           href(action=>"commit", hash=>$commit), $ref);
5363                 print "</td>\n" .
5364                       "<td class=\"link\">" .
5365                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5366                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5367
5368                 if ($ftype eq 'blob') {
5369                         my $blob_current = $file_hash;
5370                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5371                         if (defined $blob_current && defined $blob_parent &&
5372                                         $blob_current ne $blob_parent) {
5373                                 print " | " .
5374                                         $cgi->a({-href => href(action=>"blobdiff",
5375                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5376                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5377                                                                file_name=>$file_name)},
5378                                                 "diff to current");
5379                         }
5380                 }
5381                 print "</td>\n" .
5382                       "</tr>\n";
5383         }
5384         if (defined $extra) {
5385                 print "<tr>\n" .
5386                       "<td colspan=\"4\">$extra</td>\n" .
5387                       "</tr>\n";
5388         }
5389         print "</table>\n";
5390 }
5391
5392 sub git_tags_body {
5393         # uses global variable $project
5394         my ($taglist, $from, $to, $extra) = @_;
5395         $from = 0 unless defined $from;
5396         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5397
5398         print "<table class=\"tags\">\n";
5399         my $alternate = 1;
5400         for (my $i = $from; $i <= $to; $i++) {
5401                 my $entry = $taglist->[$i];
5402                 my %tag = %$entry;
5403                 my $comment = $tag{'subject'};
5404                 my $comment_short;
5405                 if (defined $comment) {
5406                         $comment_short = chop_str($comment, 30, 5);
5407                 }
5408                 if ($alternate) {
5409                         print "<tr class=\"dark\">\n";
5410                 } else {
5411                         print "<tr class=\"light\">\n";
5412                 }
5413                 $alternate ^= 1;
5414                 if (defined $tag{'age'}) {
5415                         print "<td><i>$tag{'age'}</i></td>\n";
5416                 } else {
5417                         print "<td></td>\n";
5418                 }
5419                 print "<td>" .
5420                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5421                                -class => "list name"}, esc_html($tag{'name'})) .
5422                       "</td>\n" .
5423                       "<td>";
5424                 if (defined $comment) {
5425                         print format_subject_html($comment, $comment_short,
5426                                                   href(action=>"tag", hash=>$tag{'id'}));
5427                 }
5428                 print "</td>\n" .
5429                       "<td class=\"selflink\">";
5430                 if ($tag{'type'} eq "tag") {
5431                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5432                 } else {
5433                         print "&nbsp;";
5434                 }
5435                 print "</td>\n" .
5436                       "<td class=\"link\">" . " | " .
5437                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5438                 if ($tag{'reftype'} eq "commit") {
5439                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5440                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5441                 } elsif ($tag{'reftype'} eq "blob") {
5442                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5443                 }
5444                 print "</td>\n" .
5445                       "</tr>";
5446         }
5447         if (defined $extra) {
5448                 print "<tr>\n" .
5449                       "<td colspan=\"5\">$extra</td>\n" .
5450                       "</tr>\n";
5451         }
5452         print "</table>\n";
5453 }
5454
5455 sub git_heads_body {
5456         # uses global variable $project
5457         my ($headlist, $head, $from, $to, $extra) = @_;
5458         $from = 0 unless defined $from;
5459         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5460
5461         print "<table class=\"heads\">\n";
5462         my $alternate = 1;
5463         for (my $i = $from; $i <= $to; $i++) {
5464                 my $entry = $headlist->[$i];
5465                 my %ref = %$entry;
5466                 my $curr = $ref{'id'} eq $head;
5467                 if ($alternate) {
5468                         print "<tr class=\"dark\">\n";
5469                 } else {
5470                         print "<tr class=\"light\">\n";
5471                 }
5472                 $alternate ^= 1;
5473                 print "<td><i>$ref{'age'}</i></td>\n" .
5474                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5475                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5476                                -class => "list name"},esc_html($ref{'name'})) .
5477                       "</td>\n" .
5478                       "<td class=\"link\">" .
5479                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5480                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5481                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5482                       "</td>\n" .
5483                       "</tr>";
5484         }
5485         if (defined $extra) {
5486                 print "<tr>\n" .
5487                       "<td colspan=\"3\">$extra</td>\n" .
5488                       "</tr>\n";
5489         }
5490         print "</table>\n";
5491 }
5492
5493 # Display a single remote block
5494 sub git_remote_block {
5495         my ($remote, $rdata, $limit, $head) = @_;
5496
5497         my $heads = $rdata->{'heads'};
5498         my $fetch = $rdata->{'fetch'};
5499         my $push = $rdata->{'push'};
5500
5501         my $urls_table = "<table class=\"projects_list\">\n" ;
5502
5503         if (defined $fetch) {
5504                 if ($fetch eq $push) {
5505                         $urls_table .= format_repo_url("URL", $fetch);
5506                 } else {
5507                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5508                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5509                 }
5510         } elsif (defined $push) {
5511                 $urls_table .= format_repo_url("Push URL", $push);
5512         } else {
5513                 $urls_table .= format_repo_url("", "No remote URL");
5514         }
5515
5516         $urls_table .= "</table>\n";
5517
5518         my $dots;
5519         if (defined $limit && $limit < @$heads) {
5520                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5521         }
5522
5523         print $urls_table;
5524         git_heads_body($heads, $head, 0, $limit, $dots);
5525 }
5526
5527 # Display a list of remote names with the respective fetch and push URLs
5528 sub git_remotes_list {
5529         my ($remotedata, $limit) = @_;
5530         print "<table class=\"heads\">\n";
5531         my $alternate = 1;
5532         my @remotes = sort keys %$remotedata;
5533
5534         my $limited = $limit && $limit < @remotes;
5535
5536         $#remotes = $limit - 1 if $limited;
5537
5538         while (my $remote = shift @remotes) {
5539                 my $rdata = $remotedata->{$remote};
5540                 my $fetch = $rdata->{'fetch'};
5541                 my $push = $rdata->{'push'};
5542                 if ($alternate) {
5543                         print "<tr class=\"dark\">\n";
5544                 } else {
5545                         print "<tr class=\"light\">\n";
5546                 }
5547                 $alternate ^= 1;
5548                 print "<td>" .
5549                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5550                                -class=> "list name"},esc_html($remote)) .
5551                       "</td>";
5552                 print "<td class=\"link\">" .
5553                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5554                       " | " .
5555                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5556                       "</td>";
5557
5558                 print "</tr>\n";
5559         }
5560
5561         if ($limited) {
5562                 print "<tr>\n" .
5563                       "<td colspan=\"3\">" .
5564                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5565                       "</td>\n" . "</tr>\n";
5566         }
5567
5568         print "</table>";
5569 }
5570
5571 # Display remote heads grouped by remote, unless there are too many
5572 # remotes, in which case we only display the remote names
5573 sub git_remotes_body {
5574         my ($remotedata, $limit, $head) = @_;
5575         if ($limit and $limit < keys %$remotedata) {
5576                 git_remotes_list($remotedata, $limit);
5577         } else {
5578                 fill_remote_heads($remotedata);
5579                 while (my ($remote, $rdata) = each %$remotedata) {
5580                         git_print_section({-class=>"remote", -id=>$remote},
5581                                 ["remotes", $remote, $remote], sub {
5582                                         git_remote_block($remote, $rdata, $limit, $head);
5583                                 });
5584                 }
5585         }
5586 }
5587
5588 sub git_search_message {
5589         my %co = @_;
5590
5591         my $greptype;
5592         if ($searchtype eq 'commit') {
5593                 $greptype = "--grep=";
5594         } elsif ($searchtype eq 'author') {
5595                 $greptype = "--author=";
5596         } elsif ($searchtype eq 'committer') {
5597                 $greptype = "--committer=";
5598         }
5599         $greptype .= $searchtext;
5600         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5601                                        $greptype, '--regexp-ignore-case',
5602                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5603
5604         my $paging_nav = '';
5605         if ($page > 0) {
5606                 $paging_nav .=
5607                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5608                                 "first") .
5609                         " &sdot; " .
5610                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5611                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5612         } else {
5613                 $paging_nav .= "first &sdot; prev";
5614         }
5615         my $next_link = '';
5616         if ($#commitlist >= 100) {
5617                 $next_link =
5618                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5619                                  -accesskey => "n", -title => "Alt-n"}, "next");
5620                 $paging_nav .= " &sdot; $next_link";
5621         } else {
5622                 $paging_nav .= " &sdot; next";
5623         }
5624
5625         git_header_html();
5626
5627         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5628         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5629         if ($page == 0 && !@commitlist) {
5630                 print "<p>No match.</p>\n";
5631         } else {
5632                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5633         }
5634
5635         git_footer_html();
5636 }
5637
5638 sub git_search_changes {
5639         my %co = @_;
5640
5641         local $/ = "\n";
5642         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5643                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5644                 ($search_use_regexp ? '--pickaxe-regex' : ())
5645                         or die_error(500, "Open git-log failed");
5646
5647         git_header_html();
5648
5649         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5650         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5651
5652         print "<table class=\"pickaxe search\">\n";
5653         my $alternate = 1;
5654         undef %co;
5655         my @files;
5656         while (my $line = <$fd>) {
5657                 chomp $line;
5658                 next unless $line;
5659
5660                 my %set = parse_difftree_raw_line($line);
5661                 if (defined $set{'commit'}) {
5662                         # finish previous commit
5663                         if (%co) {
5664                                 print "</td>\n" .
5665                                       "<td class=\"link\">" .
5666                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5667                                               "commit") .
5668                                       " | " .
5669                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5670                                                              hash_base=>$co{'id'})},
5671                                               "tree") .
5672                                       "</td>\n" .
5673                                       "</tr>\n";
5674                         }
5675
5676                         if ($alternate) {
5677                                 print "<tr class=\"dark\">\n";
5678                         } else {
5679                                 print "<tr class=\"light\">\n";
5680                         }
5681                         $alternate ^= 1;
5682                         %co = parse_commit($set{'commit'});
5683                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5684                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5685                               "<td><i>$author</i></td>\n" .
5686                               "<td>" .
5687                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5688                                       -class => "list subject"},
5689                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5690                 } elsif (defined $set{'to_id'}) {
5691                         next if ($set{'to_id'} =~ m/^0{40}$/);
5692
5693                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5694                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5695                                       -class => "list"},
5696                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5697                               "<br/>\n";
5698                 }
5699         }
5700         close $fd;
5701
5702         # finish last commit (warning: repetition!)
5703         if (%co) {
5704                 print "</td>\n" .
5705                       "<td class=\"link\">" .
5706                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5707                               "commit") .
5708                       " | " .
5709                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5710                                              hash_base=>$co{'id'})},
5711                               "tree") .
5712                       "</td>\n" .
5713                       "</tr>\n";
5714         }
5715
5716         print "</table>\n";
5717
5718         git_footer_html();
5719 }
5720
5721 sub git_search_files {
5722         my %co = @_;
5723
5724         local $/ = "\n";
5725         open my $fd, "-|", git_cmd(), 'grep', '-n',
5726                 $search_use_regexp ? ('-E', '-i') : '-F',
5727                 $searchtext, $co{'tree'}
5728                         or die_error(500, "Open git-grep failed");
5729
5730         git_header_html();
5731
5732         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5733         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5734
5735         print "<table class=\"grep_search\">\n";
5736         my $alternate = 1;
5737         my $matches = 0;
5738         my $lastfile = '';
5739         while (my $line = <$fd>) {
5740                 chomp $line;
5741                 my ($file, $lno, $ltext, $binary);
5742                 last if ($matches++ > 1000);
5743                 if ($line =~ /^Binary file (.+) matches$/) {
5744                         $file = $1;
5745                         $binary = 1;
5746                 } else {
5747                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5748                 }
5749                 if ($file ne $lastfile) {
5750                         $lastfile and print "</td></tr>\n";
5751                         if ($alternate++) {
5752                                 print "<tr class=\"dark\">\n";
5753                         } else {
5754                                 print "<tr class=\"light\">\n";
5755                         }
5756                         print "<td class=\"list\">".
5757                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5758                                                        file_name=>"$file"),
5759                                         -class => "list"}, esc_path($file));
5760                         print "</td><td>\n";
5761                         $lastfile = $file;
5762                 }
5763                 if ($binary) {
5764                         print "<div class=\"binary\">Binary file</div>\n";
5765                 } else {
5766                         $ltext = untabify($ltext);
5767                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5768                                 $ltext = esc_html($1, -nbsp=>1);
5769                                 $ltext .= '<span class="match">';
5770                                 $ltext .= esc_html($2, -nbsp=>1);
5771                                 $ltext .= '</span>';
5772                                 $ltext .= esc_html($3, -nbsp=>1);
5773                         } else {
5774                                 $ltext = esc_html($ltext, -nbsp=>1);
5775                         }
5776                         print "<div class=\"pre\">" .
5777                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5778                                                        file_name=>"$file").'#l'.$lno,
5779                                         -class => "linenr"}, sprintf('%4i', $lno))
5780                                 . ' ' .  $ltext . "</div>\n";
5781                 }
5782         }
5783         if ($lastfile) {
5784                 print "</td></tr>\n";
5785                 if ($matches > 1000) {
5786                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5787                 }
5788         } else {
5789                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5790         }
5791         close $fd;
5792
5793         print "</table>\n";
5794
5795         git_footer_html();
5796 }
5797
5798 sub git_search_grep_body {
5799         my ($commitlist, $from, $to, $extra) = @_;
5800         $from = 0 unless defined $from;
5801         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5802
5803         print "<table class=\"commit_search\">\n";
5804         my $alternate = 1;
5805         for (my $i = $from; $i <= $to; $i++) {
5806                 my %co = %{$commitlist->[$i]};
5807                 if (!%co) {
5808                         next;
5809                 }
5810                 my $commit = $co{'id'};
5811                 if ($alternate) {
5812                         print "<tr class=\"dark\">\n";
5813                 } else {
5814                         print "<tr class=\"light\">\n";
5815                 }
5816                 $alternate ^= 1;
5817                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5818                       format_author_html('td', \%co, 15, 5) .
5819                       "<td>" .
5820                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5821                                -class => "list subject"},
5822                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5823                 my $comment = $co{'comment'};
5824                 foreach my $line (@$comment) {
5825                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5826                                 my ($lead, $match, $trail) = ($1, $2, $3);
5827                                 $match = chop_str($match, 70, 5, 'center');
5828                                 my $contextlen = int((80 - length($match))/2);
5829                                 $contextlen = 30 if ($contextlen > 30);
5830                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5831                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5832
5833                                 $lead  = esc_html($lead);
5834                                 $match = esc_html($match);
5835                                 $trail = esc_html($trail);
5836
5837                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5838                         }
5839                 }
5840                 print "</td>\n" .
5841                       "<td class=\"link\">" .
5842                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5843                       " | " .
5844                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5845                       " | " .
5846                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5847                 print "</td>\n" .
5848                       "</tr>\n";
5849         }
5850         if (defined $extra) {
5851                 print "<tr>\n" .
5852                       "<td colspan=\"3\">$extra</td>\n" .
5853                       "</tr>\n";
5854         }
5855         print "</table>\n";
5856 }
5857
5858 ## ======================================================================
5859 ## ======================================================================
5860 ## actions
5861
5862 sub git_project_list {
5863         my $order = $input_params{'order'};
5864         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5865                 die_error(400, "Unknown order parameter");
5866         }
5867
5868         my @list = git_get_projects_list();
5869         if (!@list) {
5870                 die_error(404, "No projects found");
5871         }
5872
5873         git_header_html();
5874         if (defined $home_text && -f $home_text) {
5875                 print "<div class=\"index_include\">\n";
5876                 insert_file($home_text);
5877                 print "</div>\n";
5878         }
5879         print $cgi->startform(-method => "get") .
5880               "<p class=\"projsearch\">Search:\n" .
5881               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5882               "</p>" .
5883               $cgi->end_form() . "\n";
5884         git_project_list_body(\@list, $order);
5885         git_footer_html();
5886 }
5887
5888 sub git_forks {
5889         my $order = $input_params{'order'};
5890         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5891                 die_error(400, "Unknown order parameter");
5892         }
5893
5894         my @list = git_get_projects_list($project);
5895         if (!@list) {
5896                 die_error(404, "No forks found");
5897         }
5898
5899         git_header_html();
5900         git_print_page_nav('','');
5901         git_print_header_div('summary', "$project forks");
5902         git_project_list_body(\@list, $order);
5903         git_footer_html();
5904 }
5905
5906 sub git_project_index {
5907         my @projects = git_get_projects_list();
5908         if (!@projects) {
5909                 die_error(404, "No projects found");
5910         }
5911
5912         print $cgi->header(
5913                 -type => 'text/plain',
5914                 -charset => 'utf-8',
5915                 -content_disposition => 'inline; filename="index.aux"');
5916
5917         foreach my $pr (@projects) {
5918                 if (!exists $pr->{'owner'}) {
5919                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5920                 }
5921
5922                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5923                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5924                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5925                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5926                 $path  =~ s/ /\+/g;
5927                 $owner =~ s/ /\+/g;
5928
5929                 print "$path $owner\n";
5930         }
5931 }
5932
5933 sub git_summary {
5934         my $descr = git_get_project_description($project) || "none";
5935         my %co = parse_commit("HEAD");
5936         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5937         my $head = $co{'id'};
5938         my $remote_heads = gitweb_check_feature('remote_heads');
5939
5940         my $owner = git_get_project_owner($project);
5941
5942         my $refs = git_get_references();
5943         # These get_*_list functions return one more to allow us to see if
5944         # there are more ...
5945         my @taglist  = git_get_tags_list(16);
5946         my @headlist = git_get_heads_list(16);
5947         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5948         my @forklist;
5949         my $check_forks = gitweb_check_feature('forks');
5950
5951         if ($check_forks) {
5952                 # find forks of a project
5953                 @forklist = git_get_projects_list($project);
5954                 # filter out forks of forks
5955                 @forklist = filter_forks_from_projects_list(\@forklist)
5956                         if (@forklist);
5957         }
5958
5959         git_header_html();
5960         git_print_page_nav('summary','', $head);
5961
5962         print "<div class=\"title\">&nbsp;</div>\n";
5963         print "<table class=\"projects_list\">\n" .
5964               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5965               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5966         if (defined $cd{'rfc2822'}) {
5967                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5968                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5969         }
5970
5971         # use per project git URL list in $projectroot/$project/cloneurl
5972         # or make project git URL from git base URL and project name
5973         my $url_tag = "URL";
5974         my @url_list = git_get_project_url_list($project);
5975         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5976         foreach my $git_url (@url_list) {
5977                 next unless $git_url;
5978                 print format_repo_url($url_tag, $git_url);
5979                 $url_tag = "";
5980         }
5981
5982         # Tag cloud
5983         my $show_ctags = gitweb_check_feature('ctags');
5984         if ($show_ctags) {
5985                 my $ctags = git_get_project_ctags($project);
5986                 if (%$ctags) {
5987                         # without ability to add tags, don't show if there are none
5988                         my $cloud = git_populate_project_tagcloud($ctags);
5989                         print "<tr id=\"metadata_ctags\">" .
5990                               "<td>content tags</td>" .
5991                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5992                               "</tr>\n";
5993                 }
5994         }
5995
5996         print "</table>\n";
5997
5998         # If XSS prevention is on, we don't include README.html.
5999         # TODO: Allow a readme in some safe format.
6000         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6001                 print "<div class=\"title\">readme</div>\n" .
6002                       "<div class=\"readme\">\n";
6003                 insert_file("$projectroot/$project/README.html");
6004                 print "\n</div>\n"; # class="readme"
6005         }
6006
6007         # we need to request one more than 16 (0..15) to check if
6008         # those 16 are all
6009         my @commitlist = $head ? parse_commits($head, 17) : ();
6010         if (@commitlist) {
6011                 git_print_header_div('shortlog');
6012                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6013                                   $#commitlist <=  15 ? undef :
6014                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6015         }
6016
6017         if (@taglist) {
6018                 git_print_header_div('tags');
6019                 git_tags_body(\@taglist, 0, 15,
6020                               $#taglist <=  15 ? undef :
6021                               $cgi->a({-href => href(action=>"tags")}, "..."));
6022         }
6023
6024         if (@headlist) {
6025                 git_print_header_div('heads');
6026                 git_heads_body(\@headlist, $head, 0, 15,
6027                                $#headlist <= 15 ? undef :
6028                                $cgi->a({-href => href(action=>"heads")}, "..."));
6029         }
6030
6031         if (%remotedata) {
6032                 git_print_header_div('remotes');
6033                 git_remotes_body(\%remotedata, 15, $head);
6034         }
6035
6036         if (@forklist) {
6037                 git_print_header_div('forks');
6038                 git_project_list_body(\@forklist, 'age', 0, 15,
6039                                       $#forklist <= 15 ? undef :
6040                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6041                                       'no_header');
6042         }
6043
6044         git_footer_html();
6045 }
6046
6047 sub git_tag {
6048         my %tag = parse_tag($hash);
6049
6050         if (! %tag) {
6051                 die_error(404, "Unknown tag object");
6052         }
6053
6054         my $head = git_get_head_hash($project);
6055         git_header_html();
6056         git_print_page_nav('','', $head,undef,$head);
6057         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6058         print "<div class=\"title_text\">\n" .
6059               "<table class=\"object_header\">\n" .
6060               "<tr>\n" .
6061               "<td>object</td>\n" .
6062               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6063                                $tag{'object'}) . "</td>\n" .
6064               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6065                                               $tag{'type'}) . "</td>\n" .
6066               "</tr>\n";
6067         if (defined($tag{'author'})) {
6068                 git_print_authorship_rows(\%tag, 'author');
6069         }
6070         print "</table>\n\n" .
6071               "</div>\n";
6072         print "<div class=\"page_body\">";
6073         my $comment = $tag{'comment'};
6074         foreach my $line (@$comment) {
6075                 chomp $line;
6076                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6077         }
6078         print "</div>\n";
6079         git_footer_html();
6080 }
6081
6082 sub git_blame_common {
6083         my $format = shift || 'porcelain';
6084         if ($format eq 'porcelain' && $cgi->param('js')) {
6085                 $format = 'incremental';
6086                 $action = 'blame_incremental'; # for page title etc
6087         }
6088
6089         # permissions
6090         gitweb_check_feature('blame')
6091                 or die_error(403, "Blame view not allowed");
6092
6093         # error checking
6094         die_error(400, "No file name given") unless $file_name;
6095         $hash_base ||= git_get_head_hash($project);
6096         die_error(404, "Couldn't find base commit") unless $hash_base;
6097         my %co = parse_commit($hash_base)
6098                 or die_error(404, "Commit not found");
6099         my $ftype = "blob";
6100         if (!defined $hash) {
6101                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6102                         or die_error(404, "Error looking up file");
6103         } else {
6104                 $ftype = git_get_type($hash);
6105                 if ($ftype !~ "blob") {
6106                         die_error(400, "Object is not a blob");
6107                 }
6108         }
6109
6110         my $fd;
6111         if ($format eq 'incremental') {
6112                 # get file contents (as base)
6113                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6114                         or die_error(500, "Open git-cat-file failed");
6115         } elsif ($format eq 'data') {
6116                 # run git-blame --incremental
6117                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6118                         $hash_base, "--", $file_name
6119                         or die_error(500, "Open git-blame --incremental failed");
6120         } else {
6121                 # run git-blame --porcelain
6122                 open $fd, "-|", git_cmd(), "blame", '-p',
6123                         $hash_base, '--', $file_name
6124                         or die_error(500, "Open git-blame --porcelain failed");
6125         }
6126
6127         # incremental blame data returns early
6128         if ($format eq 'data') {
6129                 print $cgi->header(
6130                         -type=>"text/plain", -charset => "utf-8",
6131                         -status=> "200 OK");
6132                 local $| = 1; # output autoflush
6133                 print while <$fd>;
6134                 close $fd
6135                         or print "ERROR $!\n";
6136
6137                 print 'END';
6138                 if (defined $t0 && gitweb_check_feature('timed')) {
6139                         print ' '.
6140                               tv_interval($t0, [ gettimeofday() ]).
6141                               ' '.$number_of_git_cmds;
6142                 }
6143                 print "\n";
6144
6145                 return;
6146         }
6147
6148         # page header
6149         git_header_html();
6150         my $formats_nav =
6151                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6152                         "blob") .
6153                 " | ";
6154         if ($format eq 'incremental') {
6155                 $formats_nav .=
6156                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6157                                 "blame") . " (non-incremental)";
6158         } else {
6159                 $formats_nav .=
6160                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6161                                 "blame") . " (incremental)";
6162         }
6163         $formats_nav .=
6164                 " | " .
6165                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6166                         "history") .
6167                 " | " .
6168                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6169                         "HEAD");
6170         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6171         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6172         git_print_page_path($file_name, $ftype, $hash_base);
6173
6174         # page body
6175         if ($format eq 'incremental') {
6176                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6177                       "This page requires JavaScript to run.\n Use ".
6178                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6179                               'this page').
6180                       " instead.\n".
6181                       "</b></center></div>\n</noscript>\n";
6182
6183                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6184         }
6185
6186         print qq!<div class="page_body">\n!;
6187         print qq!<div id="progress_info">... / ...</div>\n!
6188                 if ($format eq 'incremental');
6189         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6190               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6191               qq!<thead>\n!.
6192               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6193               qq!</thead>\n!.
6194               qq!<tbody>\n!;
6195
6196         my @rev_color = qw(light dark);
6197         my $num_colors = scalar(@rev_color);
6198         my $current_color = 0;
6199
6200         if ($format eq 'incremental') {
6201                 my $color_class = $rev_color[$current_color];
6202
6203                 #contents of a file
6204                 my $linenr = 0;
6205         LINE:
6206                 while (my $line = <$fd>) {
6207                         chomp $line;
6208                         $linenr++;
6209
6210                         print qq!<tr id="l$linenr" class="$color_class">!.
6211                               qq!<td class="sha1"><a href=""> </a></td>!.
6212                               qq!<td class="linenr">!.
6213                               qq!<a class="linenr" href="">$linenr</a></td>!;
6214                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6215                         print qq!</tr>\n!;
6216                 }
6217
6218         } else { # porcelain, i.e. ordinary blame
6219                 my %metainfo = (); # saves information about commits
6220
6221                 # blame data
6222         LINE:
6223                 while (my $line = <$fd>) {
6224                         chomp $line;
6225                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6226                         # no <lines in group> for subsequent lines in group of lines
6227                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6228                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6229                         if (!exists $metainfo{$full_rev}) {
6230                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6231                         }
6232                         my $meta = $metainfo{$full_rev};
6233                         my $data;
6234                         while ($data = <$fd>) {
6235                                 chomp $data;
6236                                 last if ($data =~ s/^\t//); # contents of line
6237                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6238                                         $meta->{$1} = $2 unless exists $meta->{$1};
6239                                 }
6240                                 if ($data =~ /^previous /) {
6241                                         $meta->{'nprevious'}++;
6242                                 }
6243                         }
6244                         my $short_rev = substr($full_rev, 0, 8);
6245                         my $author = $meta->{'author'};
6246                         my %date =
6247                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6248                         my $date = $date{'iso-tz'};
6249                         if ($group_size) {
6250                                 $current_color = ($current_color + 1) % $num_colors;
6251                         }
6252                         my $tr_class = $rev_color[$current_color];
6253                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6254                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6255                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6256                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6257                         if ($group_size) {
6258                                 print "<td class=\"sha1\"";
6259                                 print " title=\"". esc_html($author) . ", $date\"";
6260                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6261                                 print ">";
6262                                 print $cgi->a({-href => href(action=>"commit",
6263                                                              hash=>$full_rev,
6264                                                              file_name=>$file_name)},
6265                                               esc_html($short_rev));
6266                                 if ($group_size >= 2) {
6267                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6268                                         if (@author_initials) {
6269                                                 print "<br />" .
6270                                                       esc_html(join('', @author_initials));
6271                                                 #           or join('.', ...)
6272                                         }
6273                                 }
6274                                 print "</td>\n";
6275                         }
6276                         # 'previous' <sha1 of parent commit> <filename at commit>
6277                         if (exists $meta->{'previous'} &&
6278                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6279                                 $meta->{'parent'} = $1;
6280                                 $meta->{'file_parent'} = unquote($2);
6281                         }
6282                         my $linenr_commit =
6283                                 exists($meta->{'parent'}) ?
6284                                 $meta->{'parent'} : $full_rev;
6285                         my $linenr_filename =
6286                                 exists($meta->{'file_parent'}) ?
6287                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6288                         my $blamed = href(action => 'blame',
6289                                           file_name => $linenr_filename,
6290                                           hash_base => $linenr_commit);
6291                         print "<td class=\"linenr\">";
6292                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6293                                         -class => "linenr" },
6294                                       esc_html($lineno));
6295                         print "</td>";
6296                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6297                         print "</tr>\n";
6298                 } # end while
6299
6300         }
6301
6302         # footer
6303         print "</tbody>\n".
6304               "</table>\n"; # class="blame"
6305         print "</div>\n";   # class="blame_body"
6306         close $fd
6307                 or print "Reading blob failed\n";
6308
6309         git_footer_html();
6310 }
6311
6312 sub git_blame {
6313         git_blame_common();
6314 }
6315
6316 sub git_blame_incremental {
6317         git_blame_common('incremental');
6318 }
6319
6320 sub git_blame_data {
6321         git_blame_common('data');
6322 }
6323
6324 sub git_tags {
6325         my $head = git_get_head_hash($project);
6326         git_header_html();
6327         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6328         git_print_header_div('summary', $project);
6329
6330         my @tagslist = git_get_tags_list();
6331         if (@tagslist) {
6332                 git_tags_body(\@tagslist);
6333         }
6334         git_footer_html();
6335 }
6336
6337 sub git_heads {
6338         my $head = git_get_head_hash($project);
6339         git_header_html();
6340         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6341         git_print_header_div('summary', $project);
6342
6343         my @headslist = git_get_heads_list();
6344         if (@headslist) {
6345                 git_heads_body(\@headslist, $head);
6346         }
6347         git_footer_html();
6348 }
6349
6350 # used both for single remote view and for list of all the remotes
6351 sub git_remotes {
6352         gitweb_check_feature('remote_heads')
6353                 or die_error(403, "Remote heads view is disabled");
6354
6355         my $head = git_get_head_hash($project);
6356         my $remote = $input_params{'hash'};
6357
6358         my $remotedata = git_get_remotes_list($remote);
6359         die_error(500, "Unable to get remote information") unless defined $remotedata;
6360
6361         unless (%$remotedata) {
6362                 die_error(404, defined $remote ?
6363                         "Remote $remote not found" :
6364                         "No remotes found");
6365         }
6366
6367         git_header_html(undef, undef, -action_extra => $remote);
6368         git_print_page_nav('', '',  $head, undef, $head,
6369                 format_ref_views($remote ? '' : 'remotes'));
6370
6371         fill_remote_heads($remotedata);
6372         if (defined $remote) {
6373                 git_print_header_div('remotes', "$remote remote for $project");
6374                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6375         } else {
6376                 git_print_header_div('summary', "$project remotes");
6377                 git_remotes_body($remotedata, undef, $head);
6378         }
6379
6380         git_footer_html();
6381 }
6382
6383 sub git_blob_plain {
6384         my $type = shift;
6385         my $expires;
6386
6387         if (!defined $hash) {
6388                 if (defined $file_name) {
6389                         my $base = $hash_base || git_get_head_hash($project);
6390                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6391                                 or die_error(404, "Cannot find file");
6392                 } else {
6393                         die_error(400, "No file name defined");
6394                 }
6395         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6396                 # blobs defined by non-textual hash id's can be cached
6397                 $expires = "+1d";
6398         }
6399
6400         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6401                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6402
6403         # content-type (can include charset)
6404         $type = blob_contenttype($fd, $file_name, $type);
6405
6406         # "save as" filename, even when no $file_name is given
6407         my $save_as = "$hash";
6408         if (defined $file_name) {
6409                 $save_as = $file_name;
6410         } elsif ($type =~ m/^text\//) {
6411                 $save_as .= '.txt';
6412         }
6413
6414         # With XSS prevention on, blobs of all types except a few known safe
6415         # ones are served with "Content-Disposition: attachment" to make sure
6416         # they don't run in our security domain.  For certain image types,
6417         # blob view writes an <img> tag referring to blob_plain view, and we
6418         # want to be sure not to break that by serving the image as an
6419         # attachment (though Firefox 3 doesn't seem to care).
6420         my $sandbox = $prevent_xss &&
6421                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6422
6423         # serve text/* as text/plain
6424         if ($prevent_xss &&
6425             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6426              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6427                 my $rest = $1;
6428                 $rest = defined $rest ? $rest : '';
6429                 $type = "text/plain$rest";
6430         }
6431
6432         print $cgi->header(
6433                 -type => $type,
6434                 -expires => $expires,
6435                 -content_disposition =>
6436                         ($sandbox ? 'attachment' : 'inline')
6437                         . '; filename="' . $save_as . '"');
6438         local $/ = undef;
6439         binmode STDOUT, ':raw';
6440         print <$fd>;
6441         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6442         close $fd;
6443 }
6444
6445 sub git_blob {
6446         my $expires;
6447
6448         if (!defined $hash) {
6449                 if (defined $file_name) {
6450                         my $base = $hash_base || git_get_head_hash($project);
6451                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6452                                 or die_error(404, "Cannot find file");
6453                 } else {
6454                         die_error(400, "No file name defined");
6455                 }
6456         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6457                 # blobs defined by non-textual hash id's can be cached
6458                 $expires = "+1d";
6459         }
6460
6461         my $have_blame = gitweb_check_feature('blame');
6462         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6463                 or die_error(500, "Couldn't cat $file_name, $hash");
6464         my $mimetype = blob_mimetype($fd, $file_name);
6465         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6466         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6467                 close $fd;
6468                 return git_blob_plain($mimetype);
6469         }
6470         # we can have blame only for text/* mimetype
6471         $have_blame &&= ($mimetype =~ m!^text/!);
6472
6473         my $highlight_js = gitweb_check_feature('syntaxhighlighter_js');
6474         if ($highlight_js) {
6475                 push @stylesheets, $highlight_js->{url} . '/styles/shCore'
6476                         . $highlight_js->{style} . '.css';
6477                 push @stylesheets, $highlight_js->{url} . '/styles/shTheme'
6478                         . $highlight_js->{theme} . '.css';
6479         }
6480
6481         my $highlight = gitweb_check_feature('highlight');
6482         if ($highlight_js && $highlight) {
6483                 die_error(500, 'The highlight and syntaxhighlighter_js are'
6484                         . 'mutually exclusive');
6485         }
6486         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6487         $fd = run_highlighter($fd, $highlight, $syntax)
6488                 if $syntax;
6489
6490         git_header_html(undef, $expires);
6491         my $formats_nav = '';
6492         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6493                 if (defined $file_name) {
6494                         if ($have_blame) {
6495                                 $formats_nav .=
6496                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6497                                                 "blame") .
6498                                         " | ";
6499                         }
6500                         $formats_nav .=
6501                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6502                                         "history") .
6503                                 " | " .
6504                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6505                                         "raw") .
6506                                 " | " .
6507                                 $cgi->a({-href => href(action=>"blob",
6508                                                        hash_base=>"HEAD", file_name=>$file_name)},
6509                                         "HEAD");
6510                 } else {
6511                         $formats_nav .=
6512                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6513                                         "raw");
6514                 }
6515                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6516                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6517         } else {
6518                 print "<div class=\"page_nav\">\n" .
6519                       "<br/><br/></div>\n" .
6520                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6521         }
6522         git_print_page_path($file_name, "blob", $hash_base);
6523         print "<div class=\"page_body\">\n";
6524         if ($mimetype =~ m!^image/!) {
6525                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6526                 if ($file_name) {
6527                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6528                 }
6529                 print qq! src="! .
6530                       href(action=>"blob_plain", hash=>$hash,
6531                            hash_base=>$hash_base, file_name=>$file_name) .
6532                       qq!" />\n!;
6533         } elsif ($highlight_js) {
6534                 my $ext = $file_name;
6535                 $ext =~ s/.*\.//;
6536                 print qq!<pre class="brush:!.$ext.qq!">!;
6537                 while (my $line = <$fd>) {
6538                         $line =~ s!&!\&#38;!g;
6539                         $line =~ s!<!\&#60;!g;
6540                         print $line;
6541                 }
6542                 print qq!</pre>!;
6543                 foreach my $name ('Core', 'Autoloader') {
6544                         print qq!<script src="!.$highlight_js->{url}
6545                                 .qq!/scripts/sh!.$name
6546                                 .qq!.js" type="text/javascript"></script>!;
6547                 }
6548                 print qq!<script type="text/javascript">!;
6549                 print qq!SyntaxHighlighter.defaults["pad-line-numbers"] = 3;!;
6550                 print qq!SyntaxHighlighter.defaults["toolbar"] = false;!;
6551                 # for XHTML compliance
6552                 print qq!SyntaxHighlighter.config["space"] = '&#160;';!;
6553                 print qq!SyntaxHighlighter.autoloader(!;
6554                 my $brush_prefix = $highlight_js->{url} . '/scripts/shBrush';
6555                 foreach my $language ('applescript AppleScript',
6556                                 'actionscript3 as3 AS3',
6557                                 'bash shell Bash',
6558                                 'clj Clojure',
6559                                 'coldfusion cf ColdFusion',
6560                                 'cpp c Cpp',
6561                                 'c# c-sharp csharp CSharp',
6562                                 'css Css',
6563                                 'delphi pascal Delphi',
6564                                 'diff patch pas Diff',
6565                                 'erl erlang Erlang',
6566                                 'groovy Groovy',
6567                                 'java Java',
6568                                 'jfx javafx JavaFX',
6569                                 'js jscript javascript JScript',
6570                                 'perl pl Perl',
6571                                 'php Php',
6572                                 'text plain Plain',
6573                                 'py python Python',
6574                                 'ruby rails ror rb Ruby',
6575                                 'scala Scala',
6576                                 'scm Scheme',
6577                                 'sql Sql',
6578                                 'vb vbnet Vb',
6579                                 'xml xhtml xslt html Xml') {
6580                         my $lang = $language;
6581                         $lang =~ s! (\S+)$! $brush_prefix$1!;
6582                         print "'".$lang.qq!.js',!;
6583                 }
6584                 print qq!''); SyntaxHighlighter.all();!
6585                         .qq!function scrollTo(number) {!
6586                         .qq!  var elements = document.getElementsByClassName(number);!
6587                         .qq!  if (elements.length == 0) setTimeout('scrollTo("' + number + '");', 50);!
6588                         .qq!  else {!
6589                         .qq!    window.scroll(0, elements[0].offsetTop);!
6590                         .qq!    window.scrollTo(0, elements[0].offsetTop);!
6591                         .qq!    elements[0].style.color = '#ff0000';!
6592                         .qq!  }!
6593                         .qq!}!
6594                         .qq!var lineRegex = /#l(\\d+)\$/;!
6595                         .qq!var lineNumber = lineRegex.exec(document.URL);!
6596                         .qq!if (lineNumber)!
6597                         .qq!  scrollTo('number' + lineNumber[1]);!
6598                         .qq!</script>!;
6599         } else {
6600                 my $nr;
6601                 while (my $line = <$fd>) {
6602                         chomp $line;
6603                         $nr++;
6604                         $line = untabify($line);
6605                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6606                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6607                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6608                 }
6609         }
6610         close $fd
6611                 or print "Reading blob failed.\n";
6612         print "</div>";
6613         git_footer_html();
6614 }
6615
6616 sub git_tree {
6617         if (!defined $hash_base) {
6618                 $hash_base = "HEAD";
6619         }
6620         if (!defined $hash) {
6621                 if (defined $file_name) {
6622                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6623                 } else {
6624                         $hash = $hash_base;
6625                 }
6626         }
6627         die_error(404, "No such tree") unless defined($hash);
6628
6629         my $show_sizes = gitweb_check_feature('show-sizes');
6630         my $have_blame = gitweb_check_feature('blame');
6631
6632         my @entries = ();
6633         {
6634                 local $/ = "\0";
6635                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6636                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6637                         or die_error(500, "Open git-ls-tree failed");
6638                 @entries = map { chomp; $_ } <$fd>;
6639                 close $fd
6640                         or die_error(404, "Reading tree failed");
6641         }
6642
6643         my $refs = git_get_references();
6644         my $ref = format_ref_marker($refs, $hash_base);
6645         git_header_html();
6646         my $basedir = '';
6647         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6648                 my @views_nav = ();
6649                 if (defined $file_name) {
6650                         push @views_nav,
6651                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6652                                         "history"),
6653                                 $cgi->a({-href => href(action=>"tree",
6654                                                        hash_base=>"HEAD", file_name=>$file_name)},
6655                                         "HEAD"),
6656                 }
6657                 my $snapshot_links = format_snapshot_links($hash);
6658                 if (defined $snapshot_links) {
6659                         # FIXME: Should be available when we have no hash base as well.
6660                         push @views_nav, $snapshot_links;
6661                 }
6662                 git_print_page_nav('tree','', $hash_base, undef, undef,
6663                                    join(' | ', @views_nav));
6664                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6665         } else {
6666                 undef $hash_base;
6667                 print "<div class=\"page_nav\">\n";
6668                 print "<br/><br/></div>\n";
6669                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6670         }
6671         if (defined $file_name) {
6672                 $basedir = $file_name;
6673                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6674                         $basedir .= '/';
6675                 }
6676                 git_print_page_path($file_name, 'tree', $hash_base);
6677         }
6678         print "<div class=\"page_body\">\n";
6679         print "<table class=\"tree\">\n";
6680         my $alternate = 1;
6681         # '..' (top directory) link if possible
6682         if (defined $hash_base &&
6683             defined $file_name && $file_name =~ m![^/]+$!) {
6684                 if ($alternate) {
6685                         print "<tr class=\"dark\">\n";
6686                 } else {
6687                         print "<tr class=\"light\">\n";
6688                 }
6689                 $alternate ^= 1;
6690
6691                 my $up = $file_name;
6692                 $up =~ s!/?[^/]+$!!;
6693                 undef $up unless $up;
6694                 # based on git_print_tree_entry
6695                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6696                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6697                 print '<td class="list">';
6698                 print $cgi->a({-href => href(action=>"tree",
6699                                              hash_base=>$hash_base,
6700                                              file_name=>$up)},
6701                               "..");
6702                 print "</td>\n";
6703                 print "<td class=\"link\"></td>\n";
6704
6705                 print "</tr>\n";
6706         }
6707         foreach my $line (@entries) {
6708                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6709
6710                 if ($alternate) {
6711                         print "<tr class=\"dark\">\n";
6712                 } else {
6713                         print "<tr class=\"light\">\n";
6714                 }
6715                 $alternate ^= 1;
6716
6717                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6718
6719                 print "</tr>\n";
6720         }
6721         print "</table>\n" .
6722               "</div>";
6723         git_footer_html();
6724 }
6725
6726 sub snapshot_name {
6727         my ($project, $hash) = @_;
6728
6729         # path/to/project.git  -> project
6730         # path/to/project/.git -> project
6731         my $name = to_utf8($project);
6732         $name =~ s,([^/])/*\.git$,$1,;
6733         $name = basename($name);
6734         # sanitize name
6735         $name =~ s/[[:cntrl:]]/?/g;
6736
6737         my $ver = $hash;
6738         if ($hash =~ /^[0-9a-fA-F]+$/) {
6739                 # shorten SHA-1 hash
6740                 my $full_hash = git_get_full_hash($project, $hash);
6741                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6742                         $ver = git_get_short_hash($project, $hash);
6743                 }
6744         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6745                 # tags don't need shortened SHA-1 hash
6746                 $ver = $1;
6747         } else {
6748                 # branches and other need shortened SHA-1 hash
6749                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6750                         $ver = $1;
6751                 }
6752                 $ver .= '-' . git_get_short_hash($project, $hash);
6753         }
6754         # in case of hierarchical branch names
6755         $ver =~ s!/!.!g;
6756
6757         # name = project-version_string
6758         $name = "$name-$ver";
6759
6760         return wantarray ? ($name, $name) : $name;
6761 }
6762
6763 sub git_snapshot {
6764         my $format = $input_params{'snapshot_format'};
6765         if (!@snapshot_fmts) {
6766                 die_error(403, "Snapshots not allowed");
6767         }
6768         # default to first supported snapshot format
6769         $format ||= $snapshot_fmts[0];
6770         if ($format !~ m/^[a-z0-9]+$/) {
6771                 die_error(400, "Invalid snapshot format parameter");
6772         } elsif (!exists($known_snapshot_formats{$format})) {
6773                 die_error(400, "Unknown snapshot format");
6774         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6775                 die_error(403, "Snapshot format not allowed");
6776         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6777                 die_error(403, "Unsupported snapshot format");
6778         }
6779
6780         my $type = git_get_type("$hash^{}");
6781         if (!$type) {
6782                 die_error(404, 'Object does not exist');
6783         }  elsif ($type eq 'blob') {
6784                 die_error(400, 'Object is not a tree-ish');
6785         }
6786
6787         my ($name, $prefix) = snapshot_name($project, $hash);
6788         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6789         my $cmd = quote_command(
6790                 git_cmd(), 'archive',
6791                 "--format=$known_snapshot_formats{$format}{'format'}",
6792                 "--prefix=$prefix/", $hash);
6793         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6794                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6795         }
6796
6797         $filename =~ s/(["\\])/\\$1/g;
6798         print $cgi->header(
6799                 -type => $known_snapshot_formats{$format}{'type'},
6800                 -content_disposition => 'inline; filename="' . $filename . '"',
6801                 -status => '200 OK');
6802
6803         open my $fd, "-|", $cmd
6804                 or die_error(500, "Execute git-archive failed");
6805         binmode STDOUT, ':raw';
6806         print <$fd>;
6807         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6808         close $fd;
6809 }
6810
6811 sub git_log_generic {
6812         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6813
6814         my $head = git_get_head_hash($project);
6815         if (!defined $base) {
6816                 $base = $head;
6817         }
6818         if (!defined $page) {
6819                 $page = 0;
6820         }
6821         my $refs = git_get_references();
6822
6823         my $commit_hash = $base;
6824         if (defined $parent) {
6825                 $commit_hash = "$parent..$base";
6826         }
6827         my @commitlist =
6828                 parse_commits($commit_hash, 101, (100 * $page),
6829                               defined $file_name ? ($file_name, "--full-history") : ());
6830
6831         my $ftype;
6832         if (!defined $file_hash && defined $file_name) {
6833                 # some commits could have deleted file in question,
6834                 # and not have it in tree, but one of them has to have it
6835                 for (my $i = 0; $i < @commitlist; $i++) {
6836                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6837                         last if defined $file_hash;
6838                 }
6839         }
6840         if (defined $file_hash) {
6841                 $ftype = git_get_type($file_hash);
6842         }
6843         if (defined $file_name && !defined $ftype) {
6844                 die_error(500, "Unknown type of object");
6845         }
6846         my %co;
6847         if (defined $file_name) {
6848                 %co = parse_commit($base)
6849                         or die_error(404, "Unknown commit object");
6850         }
6851
6852
6853         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6854         my $next_link = '';
6855         if ($#commitlist >= 100) {
6856                 $next_link =
6857                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6858                                  -accesskey => "n", -title => "Alt-n"}, "next");
6859         }
6860         my $patch_max = gitweb_get_feature('patches');
6861         if ($patch_max && !defined $file_name) {
6862                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6863                         $paging_nav .= " &sdot; " .
6864                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6865                                         "patches");
6866                 }
6867         }
6868
6869         git_header_html();
6870         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6871         if (defined $file_name) {
6872                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6873         } else {
6874                 git_print_header_div('summary', $project)
6875         }
6876         git_print_page_path($file_name, $ftype, $hash_base)
6877                 if (defined $file_name);
6878
6879         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6880                      $file_name, $file_hash, $ftype);
6881
6882         git_footer_html();
6883 }
6884
6885 sub git_log {
6886         git_log_generic('log', \&git_log_body,
6887                         $hash, $hash_parent);
6888 }
6889
6890 sub git_commit {
6891         $hash ||= $hash_base || "HEAD";
6892         my %co = parse_commit($hash)
6893             or die_error(404, "Unknown commit object");
6894
6895         my $parent  = $co{'parent'};
6896         my $parents = $co{'parents'}; # listref
6897
6898         # we need to prepare $formats_nav before any parameter munging
6899         my $formats_nav;
6900         if (!defined $parent) {
6901                 # --root commitdiff
6902                 $formats_nav .= '(initial)';
6903         } elsif (@$parents == 1) {
6904                 # single parent commit
6905                 $formats_nav .=
6906                         '(parent: ' .
6907                         $cgi->a({-href => href(action=>"commit",
6908                                                hash=>$parent)},
6909                                 esc_html(substr($parent, 0, 7))) .
6910                         ')';
6911         } else {
6912                 # merge commit
6913                 $formats_nav .=
6914                         '(merge: ' .
6915                         join(' ', map {
6916                                 $cgi->a({-href => href(action=>"commit",
6917                                                        hash=>$_)},
6918                                         esc_html(substr($_, 0, 7)));
6919                         } @$parents ) .
6920                         ')';
6921         }
6922         if (gitweb_check_feature('patches') && @$parents <= 1) {
6923                 $formats_nav .= " | " .
6924                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6925                                 "patch");
6926         }
6927
6928         if (!defined $parent) {
6929                 $parent = "--root";
6930         }
6931         my @difftree;
6932         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6933                 @diff_opts,
6934                 (@$parents <= 1 ? $parent : '-c'),
6935                 $hash, "--"
6936                 or die_error(500, "Open git-diff-tree failed");
6937         @difftree = map { chomp; $_ } <$fd>;
6938         close $fd or die_error(404, "Reading git-diff-tree failed");
6939
6940         # non-textual hash id's can be cached
6941         my $expires;
6942         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6943                 $expires = "+1d";
6944         }
6945         my $refs = git_get_references();
6946         my $ref = format_ref_marker($refs, $co{'id'});
6947
6948         git_header_html(undef, $expires);
6949         git_print_page_nav('commit', '',
6950                            $hash, $co{'tree'}, $hash,
6951                            $formats_nav);
6952
6953         if (defined $co{'parent'}) {
6954                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6955         } else {
6956                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6957         }
6958         print "<div class=\"title_text\">\n" .
6959               "<table class=\"object_header\">\n";
6960         git_print_authorship_rows(\%co);
6961         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6962         print "<tr>" .
6963               "<td>tree</td>" .
6964               "<td class=\"sha1\">" .
6965               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6966                        class => "list"}, $co{'tree'}) .
6967               "</td>" .
6968               "<td class=\"link\">" .
6969               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6970                       "tree");
6971         my $snapshot_links = format_snapshot_links($hash);
6972         if (defined $snapshot_links) {
6973                 print " | " . $snapshot_links;
6974         }
6975         print "</td>" .
6976               "</tr>\n";
6977
6978         foreach my $par (@$parents) {
6979                 print "<tr>" .
6980                       "<td>parent</td>" .
6981                       "<td class=\"sha1\">" .
6982                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6983                                class => "list"}, $par) .
6984                       "</td>" .
6985                       "<td class=\"link\">" .
6986                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6987                       " | " .
6988                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6989                       "</td>" .
6990                       "</tr>\n";
6991         }
6992         print "</table>".
6993               "</div>\n";
6994
6995         print "<div class=\"page_body\">\n";
6996         git_print_log($co{'comment'});
6997         print "</div>\n";
6998
6999         git_difftree_body(\@difftree, $hash, @$parents);
7000
7001         git_footer_html();
7002 }
7003
7004 sub git_object {
7005         # object is defined by:
7006         # - hash or hash_base alone
7007         # - hash_base and file_name
7008         my $type;
7009
7010         # - hash or hash_base alone
7011         if ($hash || ($hash_base && !defined $file_name)) {
7012                 my $object_id = $hash || $hash_base;
7013
7014                 open my $fd, "-|", quote_command(
7015                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7016                         or die_error(404, "Object does not exist");
7017                 $type = <$fd>;
7018                 chomp $type;
7019                 close $fd
7020                         or die_error(404, "Object does not exist");
7021
7022         # - hash_base and file_name
7023         } elsif ($hash_base && defined $file_name) {
7024                 $file_name =~ s,/+$,,;
7025
7026                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7027                         or die_error(404, "Base object does not exist");
7028
7029                 # here errors should not hapen
7030                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7031                         or die_error(500, "Open git-ls-tree failed");
7032                 my $line = <$fd>;
7033                 close $fd;
7034
7035                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7036                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7037                         die_error(404, "File or directory for given base does not exist");
7038                 }
7039                 $type = $2;
7040                 $hash = $3;
7041         } else {
7042                 die_error(400, "Not enough information to find object");
7043         }
7044
7045         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7046                                           hash=>$hash, hash_base=>$hash_base,
7047                                           file_name=>$file_name),
7048                              -status => '302 Found');
7049 }
7050
7051 sub git_blobdiff {
7052         my $format = shift || 'html';
7053
7054         my $fd;
7055         my @difftree;
7056         my %diffinfo;
7057         my $expires;
7058
7059         # preparing $fd and %diffinfo for git_patchset_body
7060         # new style URI
7061         if (defined $hash_base && defined $hash_parent_base) {
7062                 if (defined $file_name) {
7063                         # read raw output
7064                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7065                                 $hash_parent_base, $hash_base,
7066                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7067                                 or die_error(500, "Open git-diff-tree failed");
7068                         @difftree = map { chomp; $_ } <$fd>;
7069                         close $fd
7070                                 or die_error(404, "Reading git-diff-tree failed");
7071                         @difftree
7072                                 or die_error(404, "Blob diff not found");
7073
7074                 } elsif (defined $hash &&
7075                          $hash =~ /[0-9a-fA-F]{40}/) {
7076                         # try to find filename from $hash
7077
7078                         # read filtered raw output
7079                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7080                                 $hash_parent_base, $hash_base, "--"
7081                                 or die_error(500, "Open git-diff-tree failed");
7082                         @difftree =
7083                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7084                                 # $hash == to_id
7085                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7086                                 map { chomp; $_ } <$fd>;
7087                         close $fd
7088                                 or die_error(404, "Reading git-diff-tree failed");
7089                         @difftree
7090                                 or die_error(404, "Blob diff not found");
7091
7092                 } else {
7093                         die_error(400, "Missing one of the blob diff parameters");
7094                 }
7095
7096                 if (@difftree > 1) {
7097                         die_error(400, "Ambiguous blob diff specification");
7098                 }
7099
7100                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7101                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7102                 $file_name   ||= $diffinfo{'to_file'};
7103
7104                 $hash_parent ||= $diffinfo{'from_id'};
7105                 $hash        ||= $diffinfo{'to_id'};
7106
7107                 # non-textual hash id's can be cached
7108                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7109                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7110                         $expires = '+1d';
7111                 }
7112
7113                 # open patch output
7114                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7115                         '-p', ($format eq 'html' ? "--full-index" : ()),
7116                         $hash_parent_base, $hash_base,
7117                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7118                         or die_error(500, "Open git-diff-tree failed");
7119         }
7120
7121         # old/legacy style URI -- not generated anymore since 1.4.3.
7122         if (!%diffinfo) {
7123                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7124         }
7125
7126         # header
7127         if ($format eq 'html') {
7128                 my $formats_nav =
7129                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7130                                 "raw");
7131                 git_header_html(undef, $expires);
7132                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7133                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7134                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7135                 } else {
7136                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7137                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7138                 }
7139                 if (defined $file_name) {
7140                         git_print_page_path($file_name, "blob", $hash_base);
7141                 } else {
7142                         print "<div class=\"page_path\"></div>\n";
7143                 }
7144
7145         } elsif ($format eq 'plain') {
7146                 print $cgi->header(
7147                         -type => 'text/plain',
7148                         -charset => 'utf-8',
7149                         -expires => $expires,
7150                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7151
7152                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7153
7154         } else {
7155                 die_error(400, "Unknown blobdiff format");
7156         }
7157
7158         # patch
7159         if ($format eq 'html') {
7160                 print "<div class=\"page_body\">\n";
7161
7162                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
7163                 close $fd;
7164
7165                 print "</div>\n"; # class="page_body"
7166                 git_footer_html();
7167
7168         } else {
7169                 while (my $line = <$fd>) {
7170                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7171                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7172
7173                         print $line;
7174
7175                         last if $line =~ m!^\+\+\+!;
7176                 }
7177                 local $/ = undef;
7178                 print <$fd>;
7179                 close $fd;
7180         }
7181 }
7182
7183 sub git_blobdiff_plain {
7184         git_blobdiff('plain');
7185 }
7186
7187 sub git_commitdiff {
7188         my %params = @_;
7189         my $format = $params{-format} || 'html';
7190
7191         my ($patch_max) = gitweb_get_feature('patches');
7192         if ($format eq 'patch') {
7193                 die_error(403, "Patch view not allowed") unless $patch_max;
7194         }
7195
7196         $hash ||= $hash_base || "HEAD";
7197         my %co = parse_commit($hash)
7198             or die_error(404, "Unknown commit object");
7199
7200         # choose format for commitdiff for merge
7201         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7202                 $hash_parent = '--cc';
7203         }
7204         # we need to prepare $formats_nav before almost any parameter munging
7205         my $formats_nav;
7206         if ($format eq 'html') {
7207                 $formats_nav =
7208                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7209                                 "raw");
7210                 if ($patch_max && @{$co{'parents'}} <= 1) {
7211                         $formats_nav .= " | " .
7212                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7213                                         "patch");
7214                 }
7215
7216                 if (defined $hash_parent &&
7217                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7218                         # commitdiff with two commits given
7219                         my $hash_parent_short = $hash_parent;
7220                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7221                                 $hash_parent_short = substr($hash_parent, 0, 7);
7222                         }
7223                         $formats_nav .=
7224                                 ' (from';
7225                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7226                                 if ($co{'parents'}[$i] eq $hash_parent) {
7227                                         $formats_nav .= ' parent ' . ($i+1);
7228                                         last;
7229                                 }
7230                         }
7231                         $formats_nav .= ': ' .
7232                                 $cgi->a({-href => href(action=>"commitdiff",
7233                                                        hash=>$hash_parent)},
7234                                         esc_html($hash_parent_short)) .
7235                                 ')';
7236                 } elsif (!$co{'parent'}) {
7237                         # --root commitdiff
7238                         $formats_nav .= ' (initial)';
7239                 } elsif (scalar @{$co{'parents'}} == 1) {
7240                         # single parent commit
7241                         $formats_nav .=
7242                                 ' (parent: ' .
7243                                 $cgi->a({-href => href(action=>"commitdiff",
7244                                                        hash=>$co{'parent'})},
7245                                         esc_html(substr($co{'parent'}, 0, 7))) .
7246                                 ')';
7247                 } else {
7248                         # merge commit
7249                         if ($hash_parent eq '--cc') {
7250                                 $formats_nav .= ' | ' .
7251                                         $cgi->a({-href => href(action=>"commitdiff",
7252                                                                hash=>$hash, hash_parent=>'-c')},
7253                                                 'combined');
7254                         } else { # $hash_parent eq '-c'
7255                                 $formats_nav .= ' | ' .
7256                                         $cgi->a({-href => href(action=>"commitdiff",
7257                                                                hash=>$hash, hash_parent=>'--cc')},
7258                                                 'compact');
7259                         }
7260                         $formats_nav .=
7261                                 ' (merge: ' .
7262                                 join(' ', map {
7263                                         $cgi->a({-href => href(action=>"commitdiff",
7264                                                                hash=>$_)},
7265                                                 esc_html(substr($_, 0, 7)));
7266                                 } @{$co{'parents'}} ) .
7267                                 ')';
7268                 }
7269         }
7270
7271         my $hash_parent_param = $hash_parent;
7272         if (!defined $hash_parent_param) {
7273                 # --cc for multiple parents, --root for parentless
7274                 $hash_parent_param =
7275                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7276         }
7277
7278         # read commitdiff
7279         my $fd;
7280         my @difftree;
7281         if ($format eq 'html') {
7282                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7283                         "--no-commit-id", "--patch-with-raw", "--full-index",
7284                         $hash_parent_param, $hash, "--"
7285                         or die_error(500, "Open git-diff-tree failed");
7286
7287                 while (my $line = <$fd>) {
7288                         chomp $line;
7289                         # empty line ends raw part of diff-tree output
7290                         last unless $line;
7291                         push @difftree, scalar parse_difftree_raw_line($line);
7292                 }
7293
7294         } elsif ($format eq 'plain') {
7295                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7296                         '-p', $hash_parent_param, $hash, "--"
7297                         or die_error(500, "Open git-diff-tree failed");
7298         } elsif ($format eq 'patch') {
7299                 # For commit ranges, we limit the output to the number of
7300                 # patches specified in the 'patches' feature.
7301                 # For single commits, we limit the output to a single patch,
7302                 # diverging from the git-format-patch default.
7303                 my @commit_spec = ();
7304                 if ($hash_parent) {
7305                         if ($patch_max > 0) {
7306                                 push @commit_spec, "-$patch_max";
7307                         }
7308                         push @commit_spec, '-n', "$hash_parent..$hash";
7309                 } else {
7310                         if ($params{-single}) {
7311                                 push @commit_spec, '-1';
7312                         } else {
7313                                 if ($patch_max > 0) {
7314                                         push @commit_spec, "-$patch_max";
7315                                 }
7316                                 push @commit_spec, "-n";
7317                         }
7318                         push @commit_spec, '--root', $hash;
7319                 }
7320                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7321                         '--encoding=utf8', '--stdout', @commit_spec
7322                         or die_error(500, "Open git-format-patch failed");
7323         } else {
7324                 die_error(400, "Unknown commitdiff format");
7325         }
7326
7327         # non-textual hash id's can be cached
7328         my $expires;
7329         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7330                 $expires = "+1d";
7331         }
7332
7333         # write commit message
7334         if ($format eq 'html') {
7335                 my $refs = git_get_references();
7336                 my $ref = format_ref_marker($refs, $co{'id'});
7337
7338                 git_header_html(undef, $expires);
7339                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7340                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7341                 print "<div class=\"title_text\">\n" .
7342                       "<table class=\"object_header\">\n";
7343                 git_print_authorship_rows(\%co);
7344                 print "</table>".
7345                       "</div>\n";
7346                 print "<div class=\"page_body\">\n";
7347                 if (@{$co{'comment'}} > 1) {
7348                         print "<div class=\"log\">\n";
7349                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7350                         print "</div>\n"; # class="log"
7351                 }
7352
7353         } elsif ($format eq 'plain') {
7354                 my $refs = git_get_references("tags");
7355                 my $tagname = git_get_rev_name_tags($hash);
7356                 my $filename = basename($project) . "-$hash.patch";
7357
7358                 print $cgi->header(
7359                         -type => 'text/plain',
7360                         -charset => 'utf-8',
7361                         -expires => $expires,
7362                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7363                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7364                 print "From: " . to_utf8($co{'author'}) . "\n";
7365                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7366                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7367
7368                 print "X-Git-Tag: $tagname\n" if $tagname;
7369                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7370
7371                 foreach my $line (@{$co{'comment'}}) {
7372                         print to_utf8($line) . "\n";
7373                 }
7374                 print "---\n\n";
7375         } elsif ($format eq 'patch') {
7376                 my $filename = basename($project) . "-$hash.patch";
7377
7378                 print $cgi->header(
7379                         -type => 'text/plain',
7380                         -charset => 'utf-8',
7381                         -expires => $expires,
7382                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7383         }
7384
7385         # write patch
7386         if ($format eq 'html') {
7387                 my $use_parents = !defined $hash_parent ||
7388                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7389                 git_difftree_body(\@difftree, $hash,
7390                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7391                 print "<br/>\n";
7392
7393                 git_patchset_body($fd, \@difftree, $hash,
7394                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7395                 close $fd;
7396                 print "</div>\n"; # class="page_body"
7397                 git_footer_html();
7398
7399         } elsif ($format eq 'plain') {
7400                 local $/ = undef;
7401                 print <$fd>;
7402                 close $fd
7403                         or print "Reading git-diff-tree failed\n";
7404         } elsif ($format eq 'patch') {
7405                 local $/ = undef;
7406                 print <$fd>;
7407                 close $fd
7408                         or print "Reading git-format-patch failed\n";
7409         }
7410 }
7411
7412 sub git_commitdiff_plain {
7413         git_commitdiff(-format => 'plain');
7414 }
7415
7416 # format-patch-style patches
7417 sub git_patch {
7418         git_commitdiff(-format => 'patch', -single => 1);
7419 }
7420
7421 sub git_patches {
7422         git_commitdiff(-format => 'patch');
7423 }
7424
7425 sub git_history {
7426         git_log_generic('history', \&git_history_body,
7427                         $hash_base, $hash_parent_base,
7428                         $file_name, $hash);
7429 }
7430
7431 sub git_search {
7432         $searchtype ||= 'commit';
7433
7434         # check if appropriate features are enabled
7435         gitweb_check_feature('search')
7436                 or die_error(403, "Search is disabled");
7437         if ($searchtype eq 'pickaxe') {
7438                 # pickaxe may take all resources of your box and run for several minutes
7439                 # with every query - so decide by yourself how public you make this feature
7440                 gitweb_check_feature('pickaxe')
7441                         or die_error(403, "Pickaxe search is disabled");
7442         }
7443         if ($searchtype eq 'grep') {
7444                 # grep search might be potentially CPU-intensive, too
7445                 gitweb_check_feature('grep')
7446                         or die_error(403, "Grep search is disabled");
7447         }
7448
7449         if (!defined $searchtext) {
7450                 die_error(400, "Text field is empty");
7451         }
7452         if (!defined $hash) {
7453                 $hash = git_get_head_hash($project);
7454         }
7455         my %co = parse_commit($hash);
7456         if (!%co) {
7457                 die_error(404, "Unknown commit object");
7458         }
7459         if (!defined $page) {
7460                 $page = 0;
7461         }
7462
7463         if ($searchtype eq 'commit' ||
7464             $searchtype eq 'author' ||
7465             $searchtype eq 'committer') {
7466                 git_search_message(%co);
7467         } elsif ($searchtype eq 'pickaxe') {
7468                 git_search_changes(%co);
7469         } elsif ($searchtype eq 'grep') {
7470                 git_search_files(%co);
7471         } else {
7472                 die_error(400, "Unknown search type");
7473         }
7474 }
7475
7476 sub git_search_help {
7477         git_header_html();
7478         git_print_page_nav('','', $hash,$hash,$hash);
7479         print <<EOT;
7480 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7481 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7482 the pattern entered is recognized as the POSIX extended
7483 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7484 insensitive).</p>
7485 <dl>
7486 <dt><b>commit</b></dt>
7487 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7488 EOT
7489         my $have_grep = gitweb_check_feature('grep');
7490         if ($have_grep) {
7491                 print <<EOT;
7492 <dt><b>grep</b></dt>
7493 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7494     a different one) are searched for the given pattern. On large trees, this search can take
7495 a while and put some strain on the server, so please use it with some consideration. Note that
7496 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7497 case-sensitive.</dd>
7498 EOT
7499         }
7500         print <<EOT;
7501 <dt><b>author</b></dt>
7502 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7503 <dt><b>committer</b></dt>
7504 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7505 EOT
7506         my $have_pickaxe = gitweb_check_feature('pickaxe');
7507         if ($have_pickaxe) {
7508                 print <<EOT;
7509 <dt><b>pickaxe</b></dt>
7510 <dd>All commits that caused the string to appear or disappear from any file (changes that
7511 added, removed or "modified" the string) will be listed. This search can take a while and
7512 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7513 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7514 EOT
7515         }
7516         print "</dl>\n";
7517         git_footer_html();
7518 }
7519
7520 sub git_shortlog {
7521         git_log_generic('shortlog', \&git_shortlog_body,
7522                         $hash, $hash_parent);
7523 }
7524
7525 ## ......................................................................
7526 ## feeds (RSS, Atom; OPML)
7527
7528 sub git_feed {
7529         my $format = shift || 'atom';
7530         my $have_blame = gitweb_check_feature('blame');
7531
7532         # Atom: http://www.atomenabled.org/developers/syndication/
7533         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7534         if ($format ne 'rss' && $format ne 'atom') {
7535                 die_error(400, "Unknown web feed format");
7536         }
7537
7538         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7539         my $head = $hash || 'HEAD';
7540         my @commitlist = parse_commits($head, 150, 0, $file_name);
7541
7542         my %latest_commit;
7543         my %latest_date;
7544         my $content_type = "application/$format+xml";
7545         if (defined $cgi->http('HTTP_ACCEPT') &&
7546                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7547                 # browser (feed reader) prefers text/xml
7548                 $content_type = 'text/xml';
7549         }
7550         if (defined($commitlist[0])) {
7551                 %latest_commit = %{$commitlist[0]};
7552                 my $latest_epoch = $latest_commit{'committer_epoch'};
7553                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7554                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7555                 if (defined $if_modified) {
7556                         my $since;
7557                         if (eval { require HTTP::Date; 1; }) {
7558                                 $since = HTTP::Date::str2time($if_modified);
7559                         } elsif (eval { require Time::ParseDate; 1; }) {
7560                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7561                         }
7562                         if (defined $since && $latest_epoch <= $since) {
7563                                 print $cgi->header(
7564                                         -type => $content_type,
7565                                         -charset => 'utf-8',
7566                                         -last_modified => $latest_date{'rfc2822'},
7567                                         -status => '304 Not Modified');
7568                                 return;
7569                         }
7570                 }
7571                 print $cgi->header(
7572                         -type => $content_type,
7573                         -charset => 'utf-8',
7574                         -last_modified => $latest_date{'rfc2822'});
7575         } else {
7576                 print $cgi->header(
7577                         -type => $content_type,
7578                         -charset => 'utf-8');
7579         }
7580
7581         # Optimization: skip generating the body if client asks only
7582         # for Last-Modified date.
7583         return if ($cgi->request_method() eq 'HEAD');
7584
7585         # header variables
7586         my $title = "$site_name - $project/$action";
7587         my $feed_type = 'log';
7588         if (defined $hash) {
7589                 $title .= " - '$hash'";
7590                 $feed_type = 'branch log';
7591                 if (defined $file_name) {
7592                         $title .= " :: $file_name";
7593                         $feed_type = 'history';
7594                 }
7595         } elsif (defined $file_name) {
7596                 $title .= " - $file_name";
7597                 $feed_type = 'history';
7598         }
7599         $title .= " $feed_type";
7600         my $descr = git_get_project_description($project);
7601         if (defined $descr) {
7602                 $descr = esc_html($descr);
7603         } else {
7604                 $descr = "$project " .
7605                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7606                          " feed";
7607         }
7608         my $owner = git_get_project_owner($project);
7609         $owner = esc_html($owner);
7610
7611         #header
7612         my $alt_url;
7613         if (defined $file_name) {
7614                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7615         } elsif (defined $hash) {
7616                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7617         } else {
7618                 $alt_url = href(-full=>1, action=>"summary");
7619         }
7620         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7621         if ($format eq 'rss') {
7622                 print <<XML;
7623 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7624 <channel>
7625 XML
7626                 print "<title>$title</title>\n" .
7627                       "<link>$alt_url</link>\n" .
7628                       "<description>$descr</description>\n" .
7629                       "<language>en</language>\n" .
7630                       # project owner is responsible for 'editorial' content
7631                       "<managingEditor>$owner</managingEditor>\n";
7632                 if (defined $logo || defined $favicon) {
7633                         # prefer the logo to the favicon, since RSS
7634                         # doesn't allow both
7635                         my $img = esc_url($logo || $favicon);
7636                         print "<image>\n" .
7637                               "<url>$img</url>\n" .
7638                               "<title>$title</title>\n" .
7639                               "<link>$alt_url</link>\n" .
7640                               "</image>\n";
7641                 }
7642                 if (%latest_date) {
7643                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7644                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7645                 }
7646                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7647         } elsif ($format eq 'atom') {
7648                 print <<XML;
7649 <feed xmlns="http://www.w3.org/2005/Atom">
7650 XML
7651                 print "<title>$title</title>\n" .
7652                       "<subtitle>$descr</subtitle>\n" .
7653                       '<link rel="alternate" type="text/html" href="' .
7654                       $alt_url . '" />' . "\n" .
7655                       '<link rel="self" type="' . $content_type . '" href="' .
7656                       $cgi->self_url() . '" />' . "\n" .
7657                       "<id>" . href(-full=>1) . "</id>\n" .
7658                       # use project owner for feed author
7659                       "<author><name>$owner</name></author>\n";
7660                 if (defined $favicon) {
7661                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7662                 }
7663                 if (defined $logo) {
7664                         # not twice as wide as tall: 72 x 27 pixels
7665                         print "<logo>" . esc_url($logo) . "</logo>\n";
7666                 }
7667                 if (! %latest_date) {
7668                         # dummy date to keep the feed valid until commits trickle in:
7669                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7670                 } else {
7671                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7672                 }
7673                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7674         }
7675
7676         # contents
7677         for (my $i = 0; $i <= $#commitlist; $i++) {
7678                 my %co = %{$commitlist[$i]};
7679                 my $commit = $co{'id'};
7680                 # we read 150, we always show 30 and the ones more recent than 48 hours
7681                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7682                         last;
7683                 }
7684                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7685
7686                 # get list of changed files
7687                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7688                         $co{'parent'} || "--root",
7689                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7690                         or next;
7691                 my @difftree = map { chomp; $_ } <$fd>;
7692                 close $fd
7693                         or next;
7694
7695                 # print element (entry, item)
7696                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7697                 if ($format eq 'rss') {
7698                         print "<item>\n" .
7699                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7700                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7701                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7702                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7703                               "<link>$co_url</link>\n" .
7704                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7705                               "<content:encoded>" .
7706                               "<![CDATA[\n";
7707                 } elsif ($format eq 'atom') {
7708                         print "<entry>\n" .
7709                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7710                               "<updated>$cd{'iso-8601'}</updated>\n" .
7711                               "<author>\n" .
7712                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7713                         if ($co{'author_email'}) {
7714                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7715                         }
7716                         print "</author>\n" .
7717                               # use committer for contributor
7718                               "<contributor>\n" .
7719                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7720                         if ($co{'committer_email'}) {
7721                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7722                         }
7723                         print "</contributor>\n" .
7724                               "<published>$cd{'iso-8601'}</published>\n" .
7725                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7726                               "<id>$co_url</id>\n" .
7727                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7728                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7729                 }
7730                 my $comment = $co{'comment'};
7731                 print "<pre>\n";
7732                 foreach my $line (@$comment) {
7733                         $line = esc_html($line);
7734                         print "$line\n";
7735                 }
7736                 print "</pre><ul>\n";
7737                 foreach my $difftree_line (@difftree) {
7738                         my %difftree = parse_difftree_raw_line($difftree_line);
7739                         next if !$difftree{'from_id'};
7740
7741                         my $file = $difftree{'file'} || $difftree{'to_file'};
7742
7743                         print "<li>" .
7744                               "[" .
7745                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7746                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7747                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7748                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7749                                       -title => "diff"}, 'D');
7750                         if ($have_blame) {
7751                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7752                                                              file_name=>$file, hash_base=>$commit),
7753                                               -title => "blame"}, 'B');
7754                         }
7755                         # if this is not a feed of a file history
7756                         if (!defined $file_name || $file_name ne $file) {
7757                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7758                                                              file_name=>$file, hash=>$commit),
7759                                               -title => "history"}, 'H');
7760                         }
7761                         $file = esc_path($file);
7762                         print "] ".
7763                               "$file</li>\n";
7764                 }
7765                 if ($format eq 'rss') {
7766                         print "</ul>]]>\n" .
7767                               "</content:encoded>\n" .
7768                               "</item>\n";
7769                 } elsif ($format eq 'atom') {
7770                         print "</ul>\n</div>\n" .
7771                               "</content>\n" .
7772                               "</entry>\n";
7773                 }
7774         }
7775
7776         # end of feed
7777         if ($format eq 'rss') {
7778                 print "</channel>\n</rss>\n";
7779         } elsif ($format eq 'atom') {
7780                 print "</feed>\n";
7781         }
7782 }
7783
7784 sub git_rss {
7785         git_feed('rss');
7786 }
7787
7788 sub git_atom {
7789         git_feed('atom');
7790 }
7791
7792 sub git_opml {
7793         my @list = git_get_projects_list();
7794         if (!@list) {
7795                 die_error(404, "No projects found");
7796         }
7797
7798         print $cgi->header(
7799                 -type => 'text/xml',
7800                 -charset => 'utf-8',
7801                 -content_disposition => 'inline; filename="opml.xml"');
7802
7803         print <<XML;
7804 <?xml version="1.0" encoding="utf-8"?>
7805 <opml version="1.0">
7806 <head>
7807   <title>$site_name OPML Export</title>
7808 </head>
7809 <body>
7810 <outline text="git RSS feeds">
7811 XML
7812
7813         foreach my $pr (@list) {
7814                 my %proj = %$pr;
7815                 my $head = git_get_head_hash($proj{'path'});
7816                 if (!defined $head) {
7817                         next;
7818                 }
7819                 $git_dir = "$projectroot/$proj{'path'}";
7820                 my %co = parse_commit($head);
7821                 if (!%co) {
7822                         next;
7823                 }
7824
7825                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7826                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7827                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7828                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7829         }
7830         print <<XML;
7831 </outline>
7832 </body>
7833 </opml>
7834 XML
7835 }