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