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