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