Lady’s Gitweb - Gitweb/blob - 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 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 374
 375 # version of the core git binary
 376 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 377
 378 $projects_list ||= $projectroot;
 379
 380 # ======================================================================
 381 # input validation and dispatch
 382 our $action = $cgi->param('a');
 383 if (defined $action) {
 384         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 385                 die_error(undef, "Invalid action parameter");
 386         }
 387 }
 388
 389 # parameters which are pathnames
 390 our $project = $cgi->param('p');
 391 if (defined $project) {
 392         if (!validate_pathname($project) ||
 393             !(-d "$projectroot/$project") ||
 394             !check_head_link("$projectroot/$project") ||
 395             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 396             ($strict_export && !project_in_list($project))) {
 397                 undef $project;
 398                 die_error(undef, "No such project");
 399         }
 400 }
 401
 402 our $file_name = $cgi->param('f');
 403 if (defined $file_name) {
 404         if (!validate_pathname($file_name)) {
 405                 die_error(undef, "Invalid file parameter");
 406         }
 407 }
 408
 409 our $file_parent = $cgi->param('fp');
 410 if (defined $file_parent) {
 411         if (!validate_pathname($file_parent)) {
 412                 die_error(undef, "Invalid file parent parameter");
 413         }
 414 }
 415
 416 # parameters which are refnames
 417 our $hash = $cgi->param('h');
 418 if (defined $hash) {
 419         if (!validate_refname($hash)) {
 420                 die_error(undef, "Invalid hash parameter");
 421         }
 422 }
 423
 424 our $hash_parent = $cgi->param('hp');
 425 if (defined $hash_parent) {
 426         if (!validate_refname($hash_parent)) {
 427                 die_error(undef, "Invalid hash parent parameter");
 428         }
 429 }
 430
 431 our $hash_base = $cgi->param('hb');
 432 if (defined $hash_base) {
 433         if (!validate_refname($hash_base)) {
 434                 die_error(undef, "Invalid hash base parameter");
 435         }
 436 }
 437
 438 my %allowed_options = (
 439         "--no-merges" => [ qw(rss atom log shortlog history) ],
 440 );
 441
 442 our @extra_options = $cgi->param('opt');
 443 if (defined @extra_options) {
 444         foreach my $opt (@extra_options) {
 445                 if (not exists $allowed_options{$opt}) {
 446                         die_error(undef, "Invalid option parameter");
 447                 }
 448                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 449                         die_error(undef, "Invalid option parameter for this action");
 450                 }
 451         }
 452 }
 453
 454 our $hash_parent_base = $cgi->param('hpb');
 455 if (defined $hash_parent_base) {
 456         if (!validate_refname($hash_parent_base)) {
 457                 die_error(undef, "Invalid hash parent base parameter");
 458         }
 459 }
 460
 461 # other parameters
 462 our $page = $cgi->param('pg');
 463 if (defined $page) {
 464         if ($page =~ m/[^0-9]/) {
 465                 die_error(undef, "Invalid page parameter");
 466         }
 467 }
 468
 469 our $searchtype = $cgi->param('st');
 470 if (defined $searchtype) {
 471         if ($searchtype =~ m/[^a-z]/) {
 472                 die_error(undef, "Invalid searchtype parameter");
 473         }
 474 }
 475
 476 our $searchtext = $cgi->param('s');
 477 our $search_regexp;
 478 if (defined $searchtext) {
 479         if (length($searchtext) < 2) {
 480                 die_error(undef, "At least two characters are required for search parameter");
 481         }
 482         $search_regexp = quotemeta $searchtext;
 483 }
 484
 485 # now read PATH_INFO and use it as alternative to parameters
 486 sub evaluate_path_info {
 487         return if defined $project;
 488         my $path_info = $ENV{"PATH_INFO"};
 489         return if !$path_info;
 490         $path_info =~ s,^/+,,;
 491         return if !$path_info;
 492         # find which part of PATH_INFO is project
 493         $project = $path_info;
 494         $project =~ s,/+$,,;
 495         while ($project && !check_head_link("$projectroot/$project")) {
 496                 $project =~ s,/*[^/]*$,,;
 497         }
 498         # validate project
 499         $project = validate_pathname($project);
 500         if (!$project ||
 501             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 502             ($strict_export && !project_in_list($project))) {
 503                 undef $project;
 504                 return;
 505         }
 506         # do not change any parameters if an action is given using the query string
 507         return if $action;
 508         $path_info =~ s,^$project/*,,;
 509         my ($refname, $pathname) = split(/:/, $path_info, 2);
 510         if (defined $pathname) {
 511                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 512                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 513                 $pathname =~ s,^/+,,;
 514                 if (!$pathname || substr($pathname, -1) eq "/") {
 515                         $action  ||= "tree";
 516                         $pathname =~ s,/$,,;
 517                 } else {
 518                         $action  ||= "blob_plain";
 519                 }
 520                 $hash_base ||= validate_refname($refname);
 521                 $file_name ||= validate_pathname($pathname);
 522         } elsif (defined $refname) {
 523                 # we got "project.git/branch"
 524                 $action ||= "shortlog";
 525                 $hash   ||= validate_refname($refname);
 526         }
 527 }
 528 evaluate_path_info();
 529
 530 # path to the current git repository
 531 our $git_dir;
 532 $git_dir = "$projectroot/$project" if $project;
 533
 534 # dispatch
 535 my %actions = (
 536         "blame" => \&git_blame2,
 537         "blobdiff" => \&git_blobdiff,
 538         "blobdiff_plain" => \&git_blobdiff_plain,
 539         "blob" => \&git_blob,
 540         "blob_plain" => \&git_blob_plain,
 541         "commitdiff" => \&git_commitdiff,
 542         "commitdiff_plain" => \&git_commitdiff_plain,
 543         "commit" => \&git_commit,
 544         "forks" => \&git_forks,
 545         "heads" => \&git_heads,
 546         "history" => \&git_history,
 547         "log" => \&git_log,
 548         "rss" => \&git_rss,
 549         "atom" => \&git_atom,
 550         "search" => \&git_search,
 551         "search_help" => \&git_search_help,
 552         "shortlog" => \&git_shortlog,
 553         "summary" => \&git_summary,
 554         "tag" => \&git_tag,
 555         "tags" => \&git_tags,
 556         "tree" => \&git_tree,
 557         "snapshot" => \&git_snapshot,
 558         "object" => \&git_object,
 559         # those below don't need $project
 560         "opml" => \&git_opml,
 561         "project_list" => \&git_project_list,
 562         "project_index" => \&git_project_index,
 563 );
 564
 565 if (!defined $action) {
 566         if (defined $hash) {
 567                 $action = git_get_type($hash);
 568         } elsif (defined $hash_base && defined $file_name) {
 569                 $action = git_get_type("$hash_base:$file_name");
 570         } elsif (defined $project) {
 571                 $action = 'summary';
 572         } else {
 573                 $action = 'project_list';
 574         }
 575 }
 576 if (!defined($actions{$action})) {
 577         die_error(undef, "Unknown action");
 578 }
 579 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 580     !$project) {
 581         die_error(undef, "Project needed");
 582 }
 583 $actions{$action}->();
 584 exit;
 585
 586 ## ======================================================================
 587 ## action links
 588
 589 sub href(%) {
 590         my %params = @_;
 591         # default is to use -absolute url() i.e. $my_uri
 592         my $href = $params{-full} ? $my_url : $my_uri;
 593
 594         # XXX: Warning: If you touch this, check the search form for updating,
 595         # too.
 596
 597         my @mapping = (
 598                 project => "p",
 599                 action => "a",
 600                 file_name => "f",
 601                 file_parent => "fp",
 602                 hash => "h",
 603                 hash_parent => "hp",
 604                 hash_base => "hb",
 605                 hash_parent_base => "hpb",
 606                 page => "pg",
 607                 order => "o",
 608                 searchtext => "s",
 609                 searchtype => "st",
 610                 snapshot_format => "sf",
 611                 extra_options => "opt",
 612         );
 613         my %mapping = @mapping;
 614
 615         $params{'project'} = $project unless exists $params{'project'};
 616
 617         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 618         if ($use_pathinfo) {
 619                 # use PATH_INFO for project name
 620                 $href .= "/$params{'project'}" if defined $params{'project'};
 621                 delete $params{'project'};
 622
 623                 # Summary just uses the project path URL
 624                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 625                         delete $params{'action'};
 626                 }
 627         }
 628
 629         # now encode the parameters explicitly
 630         my @result = ();
 631         for (my $i = 0; $i < @mapping; $i += 2) {
 632                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 633                 if (defined $params{$name}) {
 634                         if (ref($params{$name}) eq "ARRAY") {
 635                                 foreach my $par (@{$params{$name}}) {
 636                                         push @result, $symbol . "=" . esc_param($par);
 637                                 }
 638                         } else {
 639                                 push @result, $symbol . "=" . esc_param($params{$name});
 640                         }
 641                 }
 642         }
 643         $href .= "?" . join(';', @result) if scalar @result;
 644
 645         return $href;
 646 }
 647
 648
 649 ## ======================================================================
 650 ## validation, quoting/unquoting and escaping
 651
 652 sub validate_pathname {
 653         my $input = shift || return undef;
 654
 655         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 656         # at the beginning, at the end, and between slashes.
 657         # also this catches doubled slashes
 658         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 659                 return undef;
 660         }
 661         # no null characters
 662         if ($input =~ m!\0!) {
 663                 return undef;
 664         }
 665         return $input;
 666 }
 667
 668 sub validate_refname {
 669         my $input = shift || return undef;
 670
 671         # textual hashes are O.K.
 672         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 673                 return $input;
 674         }
 675         # it must be correct pathname
 676         $input = validate_pathname($input)
 677                 or return undef;
 678         # restrictions on ref name according to git-check-ref-format
 679         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 680                 return undef;
 681         }
 682         return $input;
 683 }
 684
 685 # decode sequences of octets in utf8 into Perl's internal form,
 686 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 687 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 688 sub to_utf8 {
 689         my $str = shift;
 690         my $res;
 691         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 692         if (defined $res) {
 693                 return $res;
 694         } else {
 695                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 696         }
 697 }
 698
 699 # quote unsafe chars, but keep the slash, even when it's not
 700 # correct, but quoted slashes look too horrible in bookmarks
 701 sub esc_param {
 702         my $str = shift;
 703         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 704         $str =~ s/\+/%2B/g;
 705         $str =~ s/ /\+/g;
 706         return $str;
 707 }
 708
 709 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 710 sub esc_url {
 711         my $str = shift;
 712         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 713         $str =~ s/\+/%2B/g;
 714         $str =~ s/ /\+/g;
 715         return $str;
 716 }
 717
 718 # replace invalid utf8 character with SUBSTITUTION sequence
 719 sub esc_html ($;%) {
 720         my $str = shift;
 721         my %opts = @_;
 722
 723         $str = to_utf8($str);
 724         $str = $cgi->escapeHTML($str);
 725         if ($opts{'-nbsp'}) {
 726                 $str =~ s/ /&nbsp;/g;
 727         }
 728         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 729         return $str;
 730 }
 731
 732 # quote control characters and escape filename to HTML
 733 sub esc_path {
 734         my $str = shift;
 735         my %opts = @_;
 736
 737         $str = to_utf8($str);
 738         $str = $cgi->escapeHTML($str);
 739         if ($opts{'-nbsp'}) {
 740                 $str =~ s/ /&nbsp;/g;
 741         }
 742         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 743         return $str;
 744 }
 745
 746 # Make control characters "printable", using character escape codes (CEC)
 747 sub quot_cec {
 748         my $cntrl = shift;
 749         my %es = ( # character escape codes, aka escape sequences
 750                    "\t" => '\t',   # tab            (HT)
 751                    "\n" => '\n',   # line feed      (LF)
 752                    "\r" => '\r',   # carrige return (CR)
 753                    "\f" => '\f',   # form feed      (FF)
 754                    "\b" => '\b',   # backspace      (BS)
 755                    "\a" => '\a',   # alarm (bell)   (BEL)
 756                    "\e" => '\e',   # escape         (ESC)
 757                    "\013" => '\v', # vertical tab   (VT)
 758                    "\000" => '\0', # nul character  (NUL)
 759                    );
 760         my $chr = ( (exists $es{$cntrl})
 761                     ? $es{$cntrl}
 762                     : sprintf('\%03o', ord($cntrl)) );
 763         return "<span class=\"cntrl\">$chr</span>";
 764 }
 765
 766 # Alternatively use unicode control pictures codepoints,
 767 # Unicode "printable representation" (PR)
 768 sub quot_upr {
 769         my $cntrl = shift;
 770         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 771         return "<span class=\"cntrl\">$chr</span>";
 772 }
 773
 774 # git may return quoted and escaped filenames
 775 sub unquote {
 776         my $str = shift;
 777
 778         sub unq {
 779                 my $seq = shift;
 780                 my %es = ( # character escape codes, aka escape sequences
 781                         't' => "\t",   # tab            (HT, TAB)
 782                         'n' => "\n",   # newline        (NL)
 783                         'r' => "\r",   # return         (CR)
 784                         'f' => "\f",   # form feed      (FF)
 785                         'b' => "\b",   # backspace      (BS)
 786                         'a' => "\a",   # alarm (bell)   (BEL)
 787                         'e' => "\e",   # escape         (ESC)
 788                         'v' => "\013", # vertical tab   (VT)
 789                 );
 790
 791                 if ($seq =~ m/^[0-7]{1,3}$/) {
 792                         # octal char sequence
 793                         return chr(oct($seq));
 794                 } elsif (exists $es{$seq}) {
 795                         # C escape sequence, aka character escape code
 796                         return $es{$seq}
 797                 }
 798                 # quoted ordinary character
 799                 return $seq;
 800         }
 801
 802         if ($str =~ m/^"(.*)"$/) {
 803                 # needs unquoting
 804                 $str = $1;
 805                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 806         }
 807         return $str;
 808 }
 809
 810 # escape tabs (convert tabs to spaces)
 811 sub untabify {
 812         my $line = shift;
 813
 814         while ((my $pos = index($line, "\t")) != -1) {
 815                 if (my $count = (8 - ($pos % 8))) {
 816                         my $spaces = ' ' x $count;
 817                         $line =~ s/\t/$spaces/;
 818                 }
 819         }
 820
 821         return $line;
 822 }
 823
 824 sub project_in_list {
 825         my $project = shift;
 826         my @list = git_get_projects_list();
 827         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 828 }
 829
 830 ## ----------------------------------------------------------------------
 831 ## HTML aware string manipulation
 832
 833 sub chop_str {
 834         my $str = shift;
 835         my $len = shift;
 836         my $add_len = shift || 10;
 837
 838         # allow only $len chars, but don't cut a word if it would fit in $add_len
 839         # if it doesn't fit, cut it if it's still longer than the dots we would add
 840         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 841         my $body = $1;
 842         my $tail = $2;
 843         if (length($tail) > 4) {
 844                 $tail = " ...";
 845                 $body =~ s/&[^;]*$//; # remove chopped character entities
 846         }
 847         return "$body$tail";
 848 }
 849
 850 # takes the same arguments as chop_str, but also wraps a <span> around the
 851 # result with a title attribute if it does get chopped. Additionally, the
 852 # string is HTML-escaped.
 853 sub chop_and_escape_str {
 854         my $str = shift;
 855         my $len = shift;
 856         my $add_len = shift || 10;
 857
 858         my $chopped = chop_str($str, $len, $add_len);
 859         if ($chopped eq $str) {
 860                 return esc_html($chopped);
 861         } else {
 862                 return qq{<span title="} . esc_html($str) . qq{">} .
 863                         esc_html($chopped) . qq{</span>};
 864         }
 865 }
 866
 867 ## ----------------------------------------------------------------------
 868 ## functions returning short strings
 869
 870 # CSS class for given age value (in seconds)
 871 sub age_class {
 872         my $age = shift;
 873
 874         if (!defined $age) {
 875                 return "noage";
 876         } elsif ($age < 60*60*2) {
 877                 return "age0";
 878         } elsif ($age < 60*60*24*2) {
 879                 return "age1";
 880         } else {
 881                 return "age2";
 882         }
 883 }
 884
 885 # convert age in seconds to "nn units ago" string
 886 sub age_string {
 887         my $age = shift;
 888         my $age_str;
 889
 890         if ($age > 60*60*24*365*2) {
 891                 $age_str = (int $age/60/60/24/365);
 892                 $age_str .= " years ago";
 893         } elsif ($age > 60*60*24*(365/12)*2) {
 894                 $age_str = int $age/60/60/24/(365/12);
 895                 $age_str .= " months ago";
 896         } elsif ($age > 60*60*24*7*2) {
 897                 $age_str = int $age/60/60/24/7;
 898                 $age_str .= " weeks ago";
 899         } elsif ($age > 60*60*24*2) {
 900                 $age_str = int $age/60/60/24;
 901                 $age_str .= " days ago";
 902         } elsif ($age > 60*60*2) {
 903                 $age_str = int $age/60/60;
 904                 $age_str .= " hours ago";
 905         } elsif ($age > 60*2) {
 906                 $age_str = int $age/60;
 907                 $age_str .= " min ago";
 908         } elsif ($age > 2) {
 909                 $age_str = int $age;
 910                 $age_str .= " sec ago";
 911         } else {
 912                 $age_str .= " right now";
 913         }
 914         return $age_str;
 915 }
 916
 917 use constant {
 918         S_IFINVALID => 0030000,
 919         S_IFGITLINK => 0160000,
 920 };
 921
 922 # submodule/subproject, a commit object reference
 923 sub S_ISGITLINK($) {
 924         my $mode = shift;
 925
 926         return (($mode & S_IFMT) == S_IFGITLINK)
 927 }
 928
 929 # convert file mode in octal to symbolic file mode string
 930 sub mode_str {
 931         my $mode = oct shift;
 932
 933         if (S_ISGITLINK($mode)) {
 934                 return 'm---------';
 935         } elsif (S_ISDIR($mode & S_IFMT)) {
 936                 return 'drwxr-xr-x';
 937         } elsif (S_ISLNK($mode)) {
 938                 return 'lrwxrwxrwx';
 939         } elsif (S_ISREG($mode)) {
 940                 # git cares only about the executable bit
 941                 if ($mode & S_IXUSR) {
 942                         return '-rwxr-xr-x';
 943                 } else {
 944                         return '-rw-r--r--';
 945                 };
 946         } else {
 947                 return '----------';
 948         }
 949 }
 950
 951 # convert file mode in octal to file type string
 952 sub file_type {
 953         my $mode = shift;
 954
 955         if ($mode !~ m/^[0-7]+$/) {
 956                 return $mode;
 957         } else {
 958                 $mode = oct $mode;
 959         }
 960
 961         if (S_ISGITLINK($mode)) {
 962                 return "submodule";
 963         } elsif (S_ISDIR($mode & S_IFMT)) {
 964                 return "directory";
 965         } elsif (S_ISLNK($mode)) {
 966                 return "symlink";
 967         } elsif (S_ISREG($mode)) {
 968                 return "file";
 969         } else {
 970                 return "unknown";
 971         }
 972 }
 973
 974 # convert file mode in octal to file type description string
 975 sub file_type_long {
 976         my $mode = shift;
 977
 978         if ($mode !~ m/^[0-7]+$/) {
 979                 return $mode;
 980         } else {
 981                 $mode = oct $mode;
 982         }
 983
 984         if (S_ISGITLINK($mode)) {
 985                 return "submodule";
 986         } elsif (S_ISDIR($mode & S_IFMT)) {
 987                 return "directory";
 988         } elsif (S_ISLNK($mode)) {
 989                 return "symlink";
 990         } elsif (S_ISREG($mode)) {
 991                 if ($mode & S_IXUSR) {
 992                         return "executable";
 993                 } else {
 994                         return "file";
 995                 };
 996         } else {
 997                 return "unknown";
 998         }
 999 }
1000
1001
1002 ## ----------------------------------------------------------------------
1003 ## functions returning short HTML fragments, or transforming HTML fragments
1004 ## which don't belong to other sections
1005
1006 # format line of commit message.
1007 sub format_log_line_html {
1008         my $line = shift;
1009
1010         $line = esc_html($line, -nbsp=>1);
1011         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1012                 my $hash_text = $1;
1013                 my $link =
1014                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1015                                 -class => "text"}, $hash_text);
1016                 $line =~ s/$hash_text/$link/;
1017         }
1018         return $line;
1019 }
1020
1021 # format marker of refs pointing to given object
1022 sub format_ref_marker {
1023         my ($refs, $id) = @_;
1024         my $markers = '';
1025
1026         if (defined $refs->{$id}) {
1027                 foreach my $ref (@{$refs->{$id}}) {
1028                         my ($type, $name) = qw();
1029                         # e.g. tags/v2.6.11 or heads/next
1030                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1031                                 $type = $1;
1032                                 $name = $2;
1033                         } else {
1034                                 $type = "ref";
1035                                 $name = $ref;
1036                         }
1037
1038                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1039                                     esc_html($name) . "</span>";
1040                 }
1041         }
1042
1043         if ($markers) {
1044                 return ' <span class="refs">'. $markers . '</span>';
1045         } else {
1046                 return "";
1047         }
1048 }
1049
1050 # format, perhaps shortened and with markers, title line
1051 sub format_subject_html {
1052         my ($long, $short, $href, $extra) = @_;
1053         $extra = '' unless defined($extra);
1054
1055         if (length($short) < length($long)) {
1056                 return $cgi->a({-href => $href, -class => "list subject",
1057                                 -title => to_utf8($long)},
1058                        esc_html($short) . $extra);
1059         } else {
1060                 return $cgi->a({-href => $href, -class => "list subject"},
1061                        esc_html($long)  . $extra);
1062         }
1063 }
1064
1065 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1066 sub format_git_diff_header_line {
1067         my $line = shift;
1068         my $diffinfo = shift;
1069         my ($from, $to) = @_;
1070
1071         if ($diffinfo->{'nparents'}) {
1072                 # combined diff
1073                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1074                 if ($to->{'href'}) {
1075                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1076                                          esc_path($to->{'file'}));
1077                 } else { # file was deleted (no href)
1078                         $line .= esc_path($to->{'file'});
1079                 }
1080         } else {
1081                 # "ordinary" diff
1082                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1083                 if ($from->{'href'}) {
1084                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1085                                          'a/' . esc_path($from->{'file'}));
1086                 } else { # file was added (no href)
1087                         $line .= 'a/' . esc_path($from->{'file'});
1088                 }
1089                 $line .= ' ';
1090                 if ($to->{'href'}) {
1091                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1092                                          'b/' . esc_path($to->{'file'}));
1093                 } else { # file was deleted
1094                         $line .= 'b/' . esc_path($to->{'file'});
1095                 }
1096         }
1097
1098         return "<div class=\"diff header\">$line</div>\n";
1099 }
1100
1101 # format extended diff header line, before patch itself
1102 sub format_extended_diff_header_line {
1103         my $line = shift;
1104         my $diffinfo = shift;
1105         my ($from, $to) = @_;
1106
1107         # match <path>
1108         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1109                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1110                                        esc_path($from->{'file'}));
1111         }
1112         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1113                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1114                                  esc_path($to->{'file'}));
1115         }
1116         # match single <mode>
1117         if ($line =~ m/\s(\d{6})$/) {
1118                 $line .= '<span class="info"> (' .
1119                          file_type_long($1) .
1120                          ')</span>';
1121         }
1122         # match <hash>
1123         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1124                 # can match only for combined diff
1125                 $line = 'index ';
1126                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1127                         if ($from->{'href'}[$i]) {
1128                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1129                                                   -class=>"hash"},
1130                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1131                         } else {
1132                                 $line .= '0' x 7;
1133                         }
1134                         # separator
1135                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1136                 }
1137                 $line .= '..';
1138                 if ($to->{'href'}) {
1139                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1140                                          substr($diffinfo->{'to_id'},0,7));
1141                 } else {
1142                         $line .= '0' x 7;
1143                 }
1144
1145         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1146                 # can match only for ordinary diff
1147                 my ($from_link, $to_link);
1148                 if ($from->{'href'}) {
1149                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1150                                              substr($diffinfo->{'from_id'},0,7));
1151                 } else {
1152                         $from_link = '0' x 7;
1153                 }
1154                 if ($to->{'href'}) {
1155                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1156                                            substr($diffinfo->{'to_id'},0,7));
1157                 } else {
1158                         $to_link = '0' x 7;
1159                 }
1160                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1161                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1162         }
1163
1164         return $line . "<br/>\n";
1165 }
1166
1167 # format from-file/to-file diff header
1168 sub format_diff_from_to_header {
1169         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1170         my $line;
1171         my $result = '';
1172
1173         $line = $from_line;
1174         #assert($line =~ m/^---/) if DEBUG;
1175         # no extra formatting for "^--- /dev/null"
1176         if (! $diffinfo->{'nparents'}) {
1177                 # ordinary (single parent) diff
1178                 if ($line =~ m!^--- "?a/!) {
1179                         if ($from->{'href'}) {
1180                                 $line = '--- a/' .
1181                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1182                                                 esc_path($from->{'file'}));
1183                         } else {
1184                                 $line = '--- a/' .
1185                                         esc_path($from->{'file'});
1186                         }
1187                 }
1188                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1189
1190         } else {
1191                 # combined diff (merge commit)
1192                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1193                         if ($from->{'href'}[$i]) {
1194                                 $line = '--- ' .
1195                                         $cgi->a({-href=>href(action=>"blobdiff",
1196                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1197                                                              hash_parent_base=>$parents[$i],
1198                                                              file_parent=>$from->{'file'}[$i],
1199                                                              hash=>$diffinfo->{'to_id'},
1200                                                              hash_base=>$hash,
1201                                                              file_name=>$to->{'file'}),
1202                                                  -class=>"path",
1203                                                  -title=>"diff" . ($i+1)},
1204                                                 $i+1) .
1205                                         '/' .
1206                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1207                                                 esc_path($from->{'file'}[$i]));
1208                         } else {
1209                                 $line = '--- /dev/null';
1210                         }
1211                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1212                 }
1213         }
1214
1215         $line = $to_line;
1216         #assert($line =~ m/^\+\+\+/) if DEBUG;
1217         # no extra formatting for "^+++ /dev/null"
1218         if ($line =~ m!^\+\+\+ "?b/!) {
1219                 if ($to->{'href'}) {
1220                         $line = '+++ b/' .
1221                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1222                                         esc_path($to->{'file'}));
1223                 } else {
1224                         $line = '+++ b/' .
1225                                 esc_path($to->{'file'});
1226                 }
1227         }
1228         $result .= qq!<div class="diff to_file">$line</div>\n!;
1229
1230         return $result;
1231 }
1232
1233 # create note for patch simplified by combined diff
1234 sub format_diff_cc_simplified {
1235         my ($diffinfo, @parents) = @_;
1236         my $result = '';
1237
1238         $result .= "<div class=\"diff header\">" .
1239                    "diff --cc ";
1240         if (!is_deleted($diffinfo)) {
1241                 $result .= $cgi->a({-href => href(action=>"blob",
1242                                                   hash_base=>$hash,
1243                                                   hash=>$diffinfo->{'to_id'},
1244                                                   file_name=>$diffinfo->{'to_file'}),
1245                                     -class => "path"},
1246                                    esc_path($diffinfo->{'to_file'}));
1247         } else {
1248                 $result .= esc_path($diffinfo->{'to_file'});
1249         }
1250         $result .= "</div>\n" . # class="diff header"
1251                    "<div class=\"diff nodifferences\">" .
1252                    "Simple merge" .
1253                    "</div>\n"; # class="diff nodifferences"
1254
1255         return $result;
1256 }
1257
1258 # format patch (diff) line (not to be used for diff headers)
1259 sub format_diff_line {
1260         my $line = shift;
1261         my ($from, $to) = @_;
1262         my $diff_class = "";
1263
1264         chomp $line;
1265
1266         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1267                 # combined diff
1268                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1269                 if ($line =~ m/^\@{3}/) {
1270                         $diff_class = " chunk_header";
1271                 } elsif ($line =~ m/^\\/) {
1272                         $diff_class = " incomplete";
1273                 } elsif ($prefix =~ tr/+/+/) {
1274                         $diff_class = " add";
1275                 } elsif ($prefix =~ tr/-/-/) {
1276                         $diff_class = " rem";
1277                 }
1278         } else {
1279                 # assume ordinary diff
1280                 my $char = substr($line, 0, 1);
1281                 if ($char eq '+') {
1282                         $diff_class = " add";
1283                 } elsif ($char eq '-') {
1284                         $diff_class = " rem";
1285                 } elsif ($char eq '@') {
1286                         $diff_class = " chunk_header";
1287                 } elsif ($char eq "\\") {
1288                         $diff_class = " incomplete";
1289                 }
1290         }
1291         $line = untabify($line);
1292         if ($from && $to && $line =~ m/^\@{2} /) {
1293                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1294                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1295
1296                 $from_lines = 0 unless defined $from_lines;
1297                 $to_lines   = 0 unless defined $to_lines;
1298
1299                 if ($from->{'href'}) {
1300                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1301                                              -class=>"list"}, $from_text);
1302                 }
1303                 if ($to->{'href'}) {
1304                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1305                                              -class=>"list"}, $to_text);
1306                 }
1307                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1308                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1309                 return "<div class=\"diff$diff_class\">$line</div>\n";
1310         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1311                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1312                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1313
1314                 @from_text = split(' ', $ranges);
1315                 for (my $i = 0; $i < @from_text; ++$i) {
1316                         ($from_start[$i], $from_nlines[$i]) =
1317                                 (split(',', substr($from_text[$i], 1)), 0);
1318                 }
1319
1320                 $to_text   = pop @from_text;
1321                 $to_start  = pop @from_start;
1322                 $to_nlines = pop @from_nlines;
1323
1324                 $line = "<span class=\"chunk_info\">$prefix ";
1325                 for (my $i = 0; $i < @from_text; ++$i) {
1326                         if ($from->{'href'}[$i]) {
1327                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1328                                                   -class=>"list"}, $from_text[$i]);
1329                         } else {
1330                                 $line .= $from_text[$i];
1331                         }
1332                         $line .= " ";
1333                 }
1334                 if ($to->{'href'}) {
1335                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1336                                           -class=>"list"}, $to_text);
1337                 } else {
1338                         $line .= $to_text;
1339                 }
1340                 $line .= " $prefix</span>" .
1341                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1342                 return "<div class=\"diff$diff_class\">$line</div>\n";
1343         }
1344         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1345 }
1346
1347 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1348 # linked.  Pass the hash of the tree/commit to snapshot.
1349 sub format_snapshot_links {
1350         my ($hash) = @_;
1351         my @snapshot_fmts = gitweb_check_feature('snapshot');
1352         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1353         my $num_fmts = @snapshot_fmts;
1354         if ($num_fmts > 1) {
1355                 # A parenthesized list of links bearing format names.
1356                 # e.g. "snapshot (_tar.gz_ _zip_)"
1357                 return "snapshot (" . join(' ', map
1358                         $cgi->a({
1359                                 -href => href(
1360                                         action=>"snapshot",
1361                                         hash=>$hash,
1362                                         snapshot_format=>$_
1363                                 )
1364                         }, $known_snapshot_formats{$_}{'display'})
1365                 , @snapshot_fmts) . ")";
1366         } elsif ($num_fmts == 1) {
1367                 # A single "snapshot" link whose tooltip bears the format name.
1368                 # i.e. "_snapshot_"
1369                 my ($fmt) = @snapshot_fmts;
1370                 return
1371                         $cgi->a({
1372                                 -href => href(
1373                                         action=>"snapshot",
1374                                         hash=>$hash,
1375                                         snapshot_format=>$fmt
1376                                 ),
1377                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1378                         }, "snapshot");
1379         } else { # $num_fmts == 0
1380                 return undef;
1381         }
1382 }
1383
1384 ## ----------------------------------------------------------------------
1385 ## git utility subroutines, invoking git commands
1386
1387 # returns path to the core git executable and the --git-dir parameter as list
1388 sub git_cmd {
1389         return $GIT, '--git-dir='.$git_dir;
1390 }
1391
1392 # returns path to the core git executable and the --git-dir parameter as string
1393 sub git_cmd_str {
1394         return join(' ', git_cmd());
1395 }
1396
1397 # get HEAD ref of given project as hash
1398 sub git_get_head_hash {
1399         my $project = shift;
1400         my $o_git_dir = $git_dir;
1401         my $retval = undef;
1402         $git_dir = "$projectroot/$project";
1403         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1404                 my $head = <$fd>;
1405                 close $fd;
1406                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1407                         $retval = $1;
1408                 }
1409         }
1410         if (defined $o_git_dir) {
1411                 $git_dir = $o_git_dir;
1412         }
1413         return $retval;
1414 }
1415
1416 # get type of given object
1417 sub git_get_type {
1418         my $hash = shift;
1419
1420         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1421         my $type = <$fd>;
1422         close $fd or return;
1423         chomp $type;
1424         return $type;
1425 }
1426
1427 sub git_get_project_config {
1428         my ($key, $type) = @_;
1429
1430         return unless ($key);
1431         $key =~ s/^gitweb\.//;
1432         return if ($key =~ m/\W/);
1433
1434         my @x = (git_cmd(), 'config');
1435         if (defined $type) { push @x, $type; }
1436         push @x, "--get";
1437         push @x, "gitweb.$key";
1438         my $val = qx(@x);
1439         chomp $val;
1440         return ($val);
1441 }
1442
1443 # get hash of given path at given ref
1444 sub git_get_hash_by_path {
1445         my $base = shift;
1446         my $path = shift || return undef;
1447         my $type = shift;
1448
1449         $path =~ s,/+$,,;
1450
1451         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1452                 or die_error(undef, "Open git-ls-tree failed");
1453         my $line = <$fd>;
1454         close $fd or return undef;
1455
1456         if (!defined $line) {
1457                 # there is no tree or hash given by $path at $base
1458                 return undef;
1459         }
1460
1461         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1462         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1463         if (defined $type && $type ne $2) {
1464                 # type doesn't match
1465                 return undef;
1466         }
1467         return $3;
1468 }
1469
1470 # get path of entry with given hash at given tree-ish (ref)
1471 # used to get 'from' filename for combined diff (merge commit) for renames
1472 sub git_get_path_by_hash {
1473         my $base = shift || return;
1474         my $hash = shift || return;
1475
1476         local $/ = "\0";
1477
1478         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1479                 or return undef;
1480         while (my $line = <$fd>) {
1481                 chomp $line;
1482
1483                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1484                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1485                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1486                         close $fd;
1487                         return $1;
1488                 }
1489         }
1490         close $fd;
1491         return undef;
1492 }
1493
1494 ## ......................................................................
1495 ## git utility functions, directly accessing git repository
1496
1497 sub git_get_project_description {
1498         my $path = shift;
1499
1500         open my $fd, "$projectroot/$path/description" or return undef;
1501         my $descr = <$fd>;
1502         close $fd;
1503         if (defined $descr) {
1504                 chomp $descr;
1505         }
1506         return $descr;
1507 }
1508
1509 sub git_get_project_url_list {
1510         my $path = shift;
1511
1512         open my $fd, "$projectroot/$path/cloneurl" or return;
1513         my @git_project_url_list = map { chomp; $_ } <$fd>;
1514         close $fd;
1515
1516         return wantarray ? @git_project_url_list : \@git_project_url_list;
1517 }
1518
1519 sub git_get_projects_list {
1520         my ($filter) = @_;
1521         my @list;
1522
1523         $filter ||= '';
1524         $filter =~ s/\.git$//;
1525
1526         my ($check_forks) = gitweb_check_feature('forks');
1527
1528         if (-d $projects_list) {
1529                 # search in directory
1530                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1531                 # remove the trailing "/"
1532                 $dir =~ s!/+$!!;
1533                 my $pfxlen = length("$dir");
1534                 my $pfxdepth = ($dir =~ tr!/!!);
1535
1536                 File::Find::find({
1537                         follow_fast => 1, # follow symbolic links
1538                         follow_skip => 2, # ignore duplicates
1539                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1540                         wanted => sub {
1541                                 # skip project-list toplevel, if we get it.
1542                                 return if (m!^[/.]$!);
1543                                 # only directories can be git repositories
1544                                 return unless (-d $_);
1545                                 # don't traverse too deep (Find is super slow on os x)
1546                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1547                                         $File::Find::prune = 1;
1548                                         return;
1549                                 }
1550
1551                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1552                                 # we check related file in $projectroot
1553                                 if ($check_forks and $subdir =~ m#/.#) {
1554                                         $File::Find::prune = 1;
1555                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1556                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1557                                         $File::Find::prune = 1;
1558                                 }
1559                         },
1560                 }, "$dir");
1561
1562         } elsif (-f $projects_list) {
1563                 # read from file(url-encoded):
1564                 # 'git%2Fgit.git Linus+Torvalds'
1565                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1566                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1567                 my %paths;
1568                 open my ($fd), $projects_list or return;
1569         PROJECT:
1570                 while (my $line = <$fd>) {
1571                         chomp $line;
1572                         my ($path, $owner) = split ' ', $line;
1573                         $path = unescape($path);
1574                         $owner = unescape($owner);
1575                         if (!defined $path) {
1576                                 next;
1577                         }
1578                         if ($filter ne '') {
1579                                 # looking for forks;
1580                                 my $pfx = substr($path, 0, length($filter));
1581                                 if ($pfx ne $filter) {
1582                                         next PROJECT;
1583                                 }
1584                                 my $sfx = substr($path, length($filter));
1585                                 if ($sfx !~ /^\/.*\.git$/) {
1586                                         next PROJECT;
1587                                 }
1588                         } elsif ($check_forks) {
1589                         PATH:
1590                                 foreach my $filter (keys %paths) {
1591                                         # looking for forks;
1592                                         my $pfx = substr($path, 0, length($filter));
1593                                         if ($pfx ne $filter) {
1594                                                 next PATH;
1595                                         }
1596                                         my $sfx = substr($path, length($filter));
1597                                         if ($sfx !~ /^\/.*\.git$/) {
1598                                                 next PATH;
1599                                         }
1600                                         # is a fork, don't include it in
1601                                         # the list
1602                                         next PROJECT;
1603                                 }
1604                         }
1605                         if (check_export_ok("$projectroot/$path")) {
1606                                 my $pr = {
1607                                         path => $path,
1608                                         owner => to_utf8($owner),
1609                                 };
1610                                 push @list, $pr;
1611                                 (my $forks_path = $path) =~ s/\.git$//;
1612                                 $paths{$forks_path}++;
1613                         }
1614                 }
1615                 close $fd;
1616         }
1617         return @list;
1618 }
1619
1620 our $gitweb_project_owner = undef;
1621 sub git_get_project_list_from_file {
1622
1623         return if (defined $gitweb_project_owner);
1624
1625         $gitweb_project_owner = {};
1626         # read from file (url-encoded):
1627         # 'git%2Fgit.git Linus+Torvalds'
1628         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1629         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1630         if (-f $projects_list) {
1631                 open (my $fd , $projects_list);
1632                 while (my $line = <$fd>) {
1633                         chomp $line;
1634                         my ($pr, $ow) = split ' ', $line;
1635                         $pr = unescape($pr);
1636                         $ow = unescape($ow);
1637                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1638                 }
1639                 close $fd;
1640         }
1641 }
1642
1643 sub git_get_project_owner {
1644         my $project = shift;
1645         my $owner;
1646
1647         return undef unless $project;
1648
1649         if (!defined $gitweb_project_owner) {
1650                 git_get_project_list_from_file();
1651         }
1652
1653         if (exists $gitweb_project_owner->{$project}) {
1654                 $owner = $gitweb_project_owner->{$project};
1655         }
1656         if (!defined $owner) {
1657                 $owner = get_file_owner("$projectroot/$project");
1658         }
1659
1660         return $owner;
1661 }
1662
1663 sub git_get_last_activity {
1664         my ($path) = @_;
1665         my $fd;
1666
1667         $git_dir = "$projectroot/$path";
1668         open($fd, "-|", git_cmd(), 'for-each-ref',
1669              '--format=%(committer)',
1670              '--sort=-committerdate',
1671              '--count=1',
1672              'refs/heads') or return;
1673         my $most_recent = <$fd>;
1674         close $fd or return;
1675         if (defined $most_recent &&
1676             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1677                 my $timestamp = $1;
1678                 my $age = time - $timestamp;
1679                 return ($age, age_string($age));
1680         }
1681         return (undef, undef);
1682 }
1683
1684 sub git_get_references {
1685         my $type = shift || "";
1686         my %refs;
1687         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1688         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1689         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1690                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1691                 or return;
1692
1693         while (my $line = <$fd>) {
1694                 chomp $line;
1695                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1696                         if (defined $refs{$1}) {
1697                                 push @{$refs{$1}}, $2;
1698                         } else {
1699                                 $refs{$1} = [ $2 ];
1700                         }
1701                 }
1702         }
1703         close $fd or return;
1704         return \%refs;
1705 }
1706
1707 sub git_get_rev_name_tags {
1708         my $hash = shift || return undef;
1709
1710         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1711                 or return;
1712         my $name_rev = <$fd>;
1713         close $fd;
1714
1715         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1716                 return $1;
1717         } else {
1718                 # catches also '$hash undefined' output
1719                 return undef;
1720         }
1721 }
1722
1723 ## ----------------------------------------------------------------------
1724 ## parse to hash functions
1725
1726 sub parse_date {
1727         my $epoch = shift;
1728         my $tz = shift || "-0000";
1729
1730         my %date;
1731         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1732         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1733         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1734         $date{'hour'} = $hour;
1735         $date{'minute'} = $min;
1736         $date{'mday'} = $mday;
1737         $date{'day'} = $days[$wday];
1738         $date{'month'} = $months[$mon];
1739         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1740                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1741         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1742                              $mday, $months[$mon], $hour ,$min;
1743         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1744                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1745
1746         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1747         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1748         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1749         $date{'hour_local'} = $hour;
1750         $date{'minute_local'} = $min;
1751         $date{'tz_local'} = $tz;
1752         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1753                                   1900+$year, $mon+1, $mday,
1754                                   $hour, $min, $sec, $tz);
1755         return %date;
1756 }
1757
1758 sub parse_tag {
1759         my $tag_id = shift;
1760         my %tag;
1761         my @comment;
1762
1763         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1764         $tag{'id'} = $tag_id;
1765         while (my $line = <$fd>) {
1766                 chomp $line;
1767                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1768                         $tag{'object'} = $1;
1769                 } elsif ($line =~ m/^type (.+)$/) {
1770                         $tag{'type'} = $1;
1771                 } elsif ($line =~ m/^tag (.+)$/) {
1772                         $tag{'name'} = $1;
1773                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1774                         $tag{'author'} = $1;
1775                         $tag{'epoch'} = $2;
1776                         $tag{'tz'} = $3;
1777                 } elsif ($line =~ m/--BEGIN/) {
1778                         push @comment, $line;
1779                         last;
1780                 } elsif ($line eq "") {
1781                         last;
1782                 }
1783         }
1784         push @comment, <$fd>;
1785         $tag{'comment'} = \@comment;
1786         close $fd or return;
1787         if (!defined $tag{'name'}) {
1788                 return
1789         };
1790         return %tag
1791 }
1792
1793 sub parse_commit_text {
1794         my ($commit_text, $withparents) = @_;
1795         my @commit_lines = split '\n', $commit_text;
1796         my %co;
1797
1798         pop @commit_lines; # Remove '\0'
1799
1800         if (! @commit_lines) {
1801                 return;
1802         }
1803
1804         my $header = shift @commit_lines;
1805         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1806                 return;
1807         }
1808         ($co{'id'}, my @parents) = split ' ', $header;
1809         while (my $line = shift @commit_lines) {
1810                 last if $line eq "\n";
1811                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1812                         $co{'tree'} = $1;
1813                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1814                         push @parents, $1;
1815                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1816                         $co{'author'} = $1;
1817                         $co{'author_epoch'} = $2;
1818                         $co{'author_tz'} = $3;
1819                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1820                                 $co{'author_name'}  = $1;
1821                                 $co{'author_email'} = $2;
1822                         } else {
1823                                 $co{'author_name'} = $co{'author'};
1824                         }
1825                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1826                         $co{'committer'} = $1;
1827                         $co{'committer_epoch'} = $2;
1828                         $co{'committer_tz'} = $3;
1829                         $co{'committer_name'} = $co{'committer'};
1830                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1831                                 $co{'committer_name'}  = $1;
1832                                 $co{'committer_email'} = $2;
1833                         } else {
1834                                 $co{'committer_name'} = $co{'committer'};
1835                         }
1836                 }
1837         }
1838         if (!defined $co{'tree'}) {
1839                 return;
1840         };
1841         $co{'parents'} = \@parents;
1842         $co{'parent'} = $parents[0];
1843
1844         foreach my $title (@commit_lines) {
1845                 $title =~ s/^    //;
1846                 if ($title ne "") {
1847                         $co{'title'} = chop_str($title, 80, 5);
1848                         # remove leading stuff of merges to make the interesting part visible
1849                         if (length($title) > 50) {
1850                                 $title =~ s/^Automatic //;
1851                                 $title =~ s/^merge (of|with) /Merge ... /i;
1852                                 if (length($title) > 50) {
1853                                         $title =~ s/(http|rsync):\/\///;
1854                                 }
1855                                 if (length($title) > 50) {
1856                                         $title =~ s/(master|www|rsync)\.//;
1857                                 }
1858                                 if (length($title) > 50) {
1859                                         $title =~ s/kernel.org:?//;
1860                                 }
1861                                 if (length($title) > 50) {
1862                                         $title =~ s/\/pub\/scm//;
1863                                 }
1864                         }
1865                         $co{'title_short'} = chop_str($title, 50, 5);
1866                         last;
1867                 }
1868         }
1869         if ($co{'title'} eq "") {
1870                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1871         }
1872         # remove added spaces
1873         foreach my $line (@commit_lines) {
1874                 $line =~ s/^    //;
1875         }
1876         $co{'comment'} = \@commit_lines;
1877
1878         my $age = time - $co{'committer_epoch'};
1879         $co{'age'} = $age;
1880         $co{'age_string'} = age_string($age);
1881         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1882         if ($age > 60*60*24*7*2) {
1883                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1884                 $co{'age_string_age'} = $co{'age_string'};
1885         } else {
1886                 $co{'age_string_date'} = $co{'age_string'};
1887                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1888         }
1889         return %co;
1890 }
1891
1892 sub parse_commit {
1893         my ($commit_id) = @_;
1894         my %co;
1895
1896         local $/ = "\0";
1897
1898         open my $fd, "-|", git_cmd(), "rev-list",
1899                 "--parents",
1900                 "--header",
1901                 "--max-count=1",
1902                 $commit_id,
1903                 "--",
1904                 or die_error(undef, "Open git-rev-list failed");
1905         %co = parse_commit_text(<$fd>, 1);
1906         close $fd;
1907
1908         return %co;
1909 }
1910
1911 sub parse_commits {
1912         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1913         my @cos;
1914
1915         $maxcount ||= 1;
1916         $skip ||= 0;
1917
1918         local $/ = "\0";
1919
1920         open my $fd, "-|", git_cmd(), "rev-list",
1921                 "--header",
1922                 ($arg ? ($arg) : ()),
1923                 ("--max-count=" . $maxcount),
1924                 ("--skip=" . $skip),
1925                 @extra_options,
1926                 $commit_id,
1927                 "--",
1928                 ($filename ? ($filename) : ())
1929                 or die_error(undef, "Open git-rev-list failed");
1930         while (my $line = <$fd>) {
1931                 my %co = parse_commit_text($line);
1932                 push @cos, \%co;
1933         }
1934         close $fd;
1935
1936         return wantarray ? @cos : \@cos;
1937 }
1938
1939 # parse ref from ref_file, given by ref_id, with given type
1940 sub parse_ref {
1941         my $ref_file = shift;
1942         my $ref_id = shift;
1943         my $type = shift || git_get_type($ref_id);
1944         my %ref_item;
1945
1946         $ref_item{'type'} = $type;
1947         $ref_item{'id'} = $ref_id;
1948         $ref_item{'epoch'} = 0;
1949         $ref_item{'age'} = "unknown";
1950         if ($type eq "tag") {
1951                 my %tag = parse_tag($ref_id);
1952                 $ref_item{'comment'} = $tag{'comment'};
1953                 if ($tag{'type'} eq "commit") {
1954                         my %co = parse_commit($tag{'object'});
1955                         $ref_item{'epoch'} = $co{'committer_epoch'};
1956                         $ref_item{'age'} = $co{'age_string'};
1957                 } elsif (defined($tag{'epoch'})) {
1958                         my $age = time - $tag{'epoch'};
1959                         $ref_item{'epoch'} = $tag{'epoch'};
1960                         $ref_item{'age'} = age_string($age);
1961                 }
1962                 $ref_item{'reftype'} = $tag{'type'};
1963                 $ref_item{'name'} = $tag{'name'};
1964                 $ref_item{'refid'} = $tag{'object'};
1965         } elsif ($type eq "commit"){
1966                 my %co = parse_commit($ref_id);
1967                 $ref_item{'reftype'} = "commit";
1968                 $ref_item{'name'} = $ref_file;
1969                 $ref_item{'title'} = $co{'title'};
1970                 $ref_item{'refid'} = $ref_id;
1971                 $ref_item{'epoch'} = $co{'committer_epoch'};
1972                 $ref_item{'age'} = $co{'age_string'};
1973         } else {
1974                 $ref_item{'reftype'} = $type;
1975                 $ref_item{'name'} = $ref_file;
1976                 $ref_item{'refid'} = $ref_id;
1977         }
1978
1979         return %ref_item;
1980 }
1981
1982 # parse line of git-diff-tree "raw" output
1983 sub parse_difftree_raw_line {
1984         my $line = shift;
1985         my %res;
1986
1987         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1988         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1989         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1990                 $res{'from_mode'} = $1;
1991                 $res{'to_mode'} = $2;
1992                 $res{'from_id'} = $3;
1993                 $res{'to_id'} = $4;
1994                 $res{'status'} = $5;
1995                 $res{'similarity'} = $6;
1996                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1997                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1998                 } else {
1999                         $res{'file'} = unquote($7);
2000                 }
2001         }
2002         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2003         # combined diff (for merge commit)
2004         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2005                 $res{'nparents'}  = length($1);
2006                 $res{'from_mode'} = [ split(' ', $2) ];
2007                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2008                 $res{'from_id'} = [ split(' ', $3) ];
2009                 $res{'to_id'} = pop @{$res{'from_id'}};
2010                 $res{'status'} = [ split('', $4) ];
2011                 $res{'to_file'} = unquote($5);
2012         }
2013         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2014         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2015                 $res{'commit'} = $1;
2016         }
2017
2018         return wantarray ? %res : \%res;
2019 }
2020
2021 # parse line of git-ls-tree output
2022 sub parse_ls_tree_line ($;%) {
2023         my $line = shift;
2024         my %opts = @_;
2025         my %res;
2026
2027         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2028         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2029
2030         $res{'mode'} = $1;
2031         $res{'type'} = $2;
2032         $res{'hash'} = $3;
2033         if ($opts{'-z'}) {
2034                 $res{'name'} = $4;
2035         } else {
2036                 $res{'name'} = unquote($4);
2037         }
2038
2039         return wantarray ? %res : \%res;
2040 }
2041
2042 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2043 sub parse_from_to_diffinfo {
2044         my ($diffinfo, $from, $to, @parents) = @_;
2045
2046         if ($diffinfo->{'nparents'}) {
2047                 # combined diff
2048                 $from->{'file'} = [];
2049                 $from->{'href'} = [];
2050                 fill_from_file_info($diffinfo, @parents)
2051                         unless exists $diffinfo->{'from_file'};
2052                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2053                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2054                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2055                                 $from->{'href'}[$i] = href(action=>"blob",
2056                                                            hash_base=>$parents[$i],
2057                                                            hash=>$diffinfo->{'from_id'}[$i],
2058                                                            file_name=>$from->{'file'}[$i]);
2059                         } else {
2060                                 $from->{'href'}[$i] = undef;
2061                         }
2062                 }
2063         } else {
2064                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2065                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2066                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2067                                                hash=>$diffinfo->{'from_id'},
2068                                                file_name=>$from->{'file'});
2069                 } else {
2070                         delete $from->{'href'};
2071                 }
2072         }
2073
2074         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2075         if (!is_deleted($diffinfo)) { # file exists in result
2076                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2077                                      hash=>$diffinfo->{'to_id'},
2078                                      file_name=>$to->{'file'});
2079         } else {
2080                 delete $to->{'href'};
2081         }
2082 }
2083
2084 ## ......................................................................
2085 ## parse to array of hashes functions
2086
2087 sub git_get_heads_list {
2088         my $limit = shift;
2089         my @headslist;
2090
2091         open my $fd, '-|', git_cmd(), 'for-each-ref',
2092                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2093                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2094                 'refs/heads'
2095                 or return;
2096         while (my $line = <$fd>) {
2097                 my %ref_item;
2098
2099                 chomp $line;
2100                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2101                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2102                 my ($committer, $epoch, $tz) =
2103                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2104                 $name =~ s!^refs/heads/!!;
2105
2106                 $ref_item{'name'}  = $name;
2107                 $ref_item{'id'}    = $hash;
2108                 $ref_item{'title'} = $title || '(no commit message)';
2109                 $ref_item{'epoch'} = $epoch;
2110                 if ($epoch) {
2111                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2112                 } else {
2113                         $ref_item{'age'} = "unknown";
2114                 }
2115
2116                 push @headslist, \%ref_item;
2117         }
2118         close $fd;
2119
2120         return wantarray ? @headslist : \@headslist;
2121 }
2122
2123 sub git_get_tags_list {
2124         my $limit = shift;
2125         my @tagslist;
2126
2127         open my $fd, '-|', git_cmd(), 'for-each-ref',
2128                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2129                 '--format=%(objectname) %(objecttype) %(refname) '.
2130                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2131                 'refs/tags'
2132                 or return;
2133         while (my $line = <$fd>) {
2134                 my %ref_item;
2135
2136                 chomp $line;
2137                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2138                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2139                 my ($creator, $epoch, $tz) =
2140                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2141                 $name =~ s!^refs/tags/!!;
2142
2143                 $ref_item{'type'} = $type;
2144                 $ref_item{'id'} = $id;
2145                 $ref_item{'name'} = $name;
2146                 if ($type eq "tag") {
2147                         $ref_item{'subject'} = $title;
2148                         $ref_item{'reftype'} = $reftype;
2149                         $ref_item{'refid'}   = $refid;
2150                 } else {
2151                         $ref_item{'reftype'} = $type;
2152                         $ref_item{'refid'}   = $id;
2153                 }
2154
2155                 if ($type eq "tag" || $type eq "commit") {
2156                         $ref_item{'epoch'} = $epoch;
2157                         if ($epoch) {
2158                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2159                         } else {
2160                                 $ref_item{'age'} = "unknown";
2161                         }
2162                 }
2163
2164                 push @tagslist, \%ref_item;
2165         }
2166         close $fd;
2167
2168         return wantarray ? @tagslist : \@tagslist;
2169 }
2170
2171 ## ----------------------------------------------------------------------
2172 ## filesystem-related functions
2173
2174 sub get_file_owner {
2175         my $path = shift;
2176
2177         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2178         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2179         if (!defined $gcos) {
2180                 return undef;
2181         }
2182         my $owner = $gcos;
2183         $owner =~ s/[,;].*$//;
2184         return to_utf8($owner);
2185 }
2186
2187 ## ......................................................................
2188 ## mimetype related functions
2189
2190 sub mimetype_guess_file {
2191         my $filename = shift;
2192         my $mimemap = shift;
2193         -r $mimemap or return undef;
2194
2195         my %mimemap;
2196         open(MIME, $mimemap) or return undef;
2197         while (<MIME>) {
2198                 next if m/^#/; # skip comments
2199                 my ($mime, $exts) = split(/\t+/);
2200                 if (defined $exts) {
2201                         my @exts = split(/\s+/, $exts);
2202                         foreach my $ext (@exts) {
2203                                 $mimemap{$ext} = $mime;
2204                         }
2205                 }
2206         }
2207         close(MIME);
2208
2209         $filename =~ /\.([^.]*)$/;
2210         return $mimemap{$1};
2211 }
2212
2213 sub mimetype_guess {
2214         my $filename = shift;
2215         my $mime;
2216         $filename =~ /\./ or return undef;
2217
2218         if ($mimetypes_file) {
2219                 my $file = $mimetypes_file;
2220                 if ($file !~ m!^/!) { # if it is relative path
2221                         # it is relative to project
2222                         $file = "$projectroot/$project/$file";
2223                 }
2224                 $mime = mimetype_guess_file($filename, $file);
2225         }
2226         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2227         return $mime;
2228 }
2229
2230 sub blob_mimetype {
2231         my $fd = shift;
2232         my $filename = shift;
2233
2234         if ($filename) {
2235                 my $mime = mimetype_guess($filename);
2236                 $mime and return $mime;
2237         }
2238
2239         # just in case
2240         return $default_blob_plain_mimetype unless $fd;
2241
2242         if (-T $fd) {
2243                 return 'text/plain' .
2244                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2245         } elsif (! $filename) {
2246                 return 'application/octet-stream';
2247         } elsif ($filename =~ m/\.png$/i) {
2248                 return 'image/png';
2249         } elsif ($filename =~ m/\.gif$/i) {
2250                 return 'image/gif';
2251         } elsif ($filename =~ m/\.jpe?g$/i) {
2252                 return 'image/jpeg';
2253         } else {
2254                 return 'application/octet-stream';
2255         }
2256 }
2257
2258 ## ======================================================================
2259 ## functions printing HTML: header, footer, error page
2260
2261 sub git_header_html {
2262         my $status = shift || "200 OK";
2263         my $expires = shift;
2264
2265         my $title = "$site_name";
2266         if (defined $project) {
2267                 $title .= " - " . to_utf8($project);
2268                 if (defined $action) {
2269                         $title .= "/$action";
2270                         if (defined $file_name) {
2271                                 $title .= " - " . esc_path($file_name);
2272                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2273                                         $title .= "/";
2274                                 }
2275                         }
2276                 }
2277         }
2278         my $content_type;
2279         # require explicit support from the UA if we are to send the page as
2280         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2281         # we have to do this because MSIE sometimes globs '*/*', pretending to
2282         # support xhtml+xml but choking when it gets what it asked for.
2283         if (defined $cgi->http('HTTP_ACCEPT') &&
2284             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2285             $cgi->Accept('application/xhtml+xml') != 0) {
2286                 $content_type = 'application/xhtml+xml';
2287         } else {
2288                 $content_type = 'text/html';
2289         }
2290         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2291                            -status=> $status, -expires => $expires);
2292         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2293         print <<EOF;
2294 <?xml version="1.0" encoding="utf-8"?>
2295 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2296 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2297 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2298 <!-- git core binaries version $git_version -->
2299 <head>
2300 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2301 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2302 <meta name="robots" content="index, nofollow"/>
2303 <title>$title</title>
2304 EOF
2305 # print out each stylesheet that exist
2306         if (defined $stylesheet) {
2307 #provides backwards capability for those people who define style sheet in a config file
2308                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2309         } else {
2310                 foreach my $stylesheet (@stylesheets) {
2311                         next unless $stylesheet;
2312                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2313                 }
2314         }
2315         if (defined $project) {
2316                 printf('<link rel="alternate" title="%s log RSS feed" '.
2317                        'href="%s" type="application/rss+xml" />'."\n",
2318                        esc_param($project), href(action=>"rss"));
2319                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2320                        'href="%s" type="application/rss+xml" />'."\n",
2321                        esc_param($project), href(action=>"rss",
2322                                                  extra_options=>"--no-merges"));
2323                 printf('<link rel="alternate" title="%s log Atom feed" '.
2324                        'href="%s" type="application/atom+xml" />'."\n",
2325                        esc_param($project), href(action=>"atom"));
2326                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2327                        'href="%s" type="application/atom+xml" />'."\n",
2328                        esc_param($project), href(action=>"atom",
2329                                                  extra_options=>"--no-merges"));
2330         } else {
2331                 printf('<link rel="alternate" title="%s projects list" '.
2332                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2333                        $site_name, href(project=>undef, action=>"project_index"));
2334                 printf('<link rel="alternate" title="%s projects feeds" '.
2335                        'href="%s" type="text/x-opml"/>'."\n",
2336                        $site_name, href(project=>undef, action=>"opml"));
2337         }
2338         if (defined $favicon) {
2339                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2340         }
2341
2342         print "</head>\n" .
2343               "<body>\n";
2344
2345         if (-f $site_header) {
2346                 open (my $fd, $site_header);
2347                 print <$fd>;
2348                 close $fd;
2349         }
2350
2351         print "<div class=\"page_header\">\n" .
2352               $cgi->a({-href => esc_url($logo_url),
2353                        -title => $logo_label},
2354                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2355         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2356         if (defined $project) {
2357                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2358                 if (defined $action) {
2359                         print " / $action";
2360                 }
2361                 print "\n";
2362         }
2363         print "</div>\n";
2364
2365         my ($have_search) = gitweb_check_feature('search');
2366         if ((defined $project) && ($have_search)) {
2367                 if (!defined $searchtext) {
2368                         $searchtext = "";
2369                 }
2370                 my $search_hash;
2371                 if (defined $hash_base) {
2372                         $search_hash = $hash_base;
2373                 } elsif (defined $hash) {
2374                         $search_hash = $hash;
2375                 } else {
2376                         $search_hash = "HEAD";
2377                 }
2378                 my $action = $my_uri;
2379                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2380                 if ($use_pathinfo) {
2381                         $action .= "/$project";
2382                 } else {
2383                         $cgi->param("p", $project);
2384                 }
2385                 $cgi->param("a", "search");
2386                 $cgi->param("h", $search_hash);
2387                 print $cgi->startform(-method => "get", -action => $action) .
2388                       "<div class=\"search\">\n" .
2389                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2390                       $cgi->hidden(-name => "a") . "\n" .
2391                       $cgi->hidden(-name => "h") . "\n" .
2392                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2393                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2394                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2395                       " search:\n",
2396                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2397                       "</div>" .
2398                       $cgi->end_form() . "\n";
2399         }
2400 }
2401
2402 sub git_footer_html {
2403         print "<div class=\"page_footer\">\n";
2404         if (defined $project) {
2405                 my $descr = git_get_project_description($project);
2406                 if (defined $descr) {
2407                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2408                 }
2409                 print $cgi->a({-href => href(action=>"rss"),
2410                               -class => "rss_logo"}, "RSS") . " ";
2411                 print $cgi->a({-href => href(action=>"atom"),
2412                               -class => "rss_logo"}, "Atom") . "\n";
2413         } else {
2414                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2415                               -class => "rss_logo"}, "OPML") . " ";
2416                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2417                               -class => "rss_logo"}, "TXT") . "\n";
2418         }
2419         print "</div>\n" ;
2420
2421         if (-f $site_footer) {
2422                 open (my $fd, $site_footer);
2423                 print <$fd>;
2424                 close $fd;
2425         }
2426
2427         print "</body>\n" .
2428               "</html>";
2429 }
2430
2431 sub die_error {
2432         my $status = shift || "403 Forbidden";
2433         my $error = shift || "Malformed query, file missing or permission denied";
2434
2435         git_header_html($status);
2436         print <<EOF;
2437 <div class="page_body">
2438 <br /><br />
2439 $status - $error
2440 <br />
2441 </div>
2442 EOF
2443         git_footer_html();
2444         exit;
2445 }
2446
2447 ## ----------------------------------------------------------------------
2448 ## functions printing or outputting HTML: navigation
2449
2450 sub git_print_page_nav {
2451         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2452         $extra = '' if !defined $extra; # pager or formats
2453
2454         my @navs = qw(summary shortlog log commit commitdiff tree);
2455         if ($suppress) {
2456                 @navs = grep { $_ ne $suppress } @navs;
2457         }
2458
2459         my %arg = map { $_ => {action=>$_} } @navs;
2460         if (defined $head) {
2461                 for (qw(commit commitdiff)) {
2462                         $arg{$_}{'hash'} = $head;
2463                 }
2464                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2465                         for (qw(shortlog log)) {
2466                                 $arg{$_}{'hash'} = $head;
2467                         }
2468                 }
2469         }
2470         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2471         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2472
2473         print "<div class=\"page_nav\">\n" .
2474                 (join " | ",
2475                  map { $_ eq $current ?
2476                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2477                  } @navs);
2478         print "<br/>\n$extra<br/>\n" .
2479               "</div>\n";
2480 }
2481
2482 sub format_paging_nav {
2483         my ($action, $hash, $head, $page, $nrevs) = @_;
2484         my $paging_nav;
2485
2486
2487         if ($hash ne $head || $page) {
2488                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2489         } else {
2490                 $paging_nav .= "HEAD";
2491         }
2492
2493         if ($page > 0) {
2494                 $paging_nav .= " &sdot; " .
2495                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2496                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2497         } else {
2498                 $paging_nav .= " &sdot; prev";
2499         }
2500
2501         if ($nrevs >= (100 * ($page+1)-1)) {
2502                 $paging_nav .= " &sdot; " .
2503                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2504                                  -accesskey => "n", -title => "Alt-n"}, "next");
2505         } else {
2506                 $paging_nav .= " &sdot; next";
2507         }
2508
2509         return $paging_nav;
2510 }
2511
2512 ## ......................................................................
2513 ## functions printing or outputting HTML: div
2514
2515 sub git_print_header_div {
2516         my ($action, $title, $hash, $hash_base) = @_;
2517         my %args = ();
2518
2519         $args{'action'} = $action;
2520         $args{'hash'} = $hash if $hash;
2521         $args{'hash_base'} = $hash_base if $hash_base;
2522
2523         print "<div class=\"header\">\n" .
2524               $cgi->a({-href => href(%args), -class => "title"},
2525               $title ? $title : $action) .
2526               "\n</div>\n";
2527 }
2528
2529 #sub git_print_authorship (\%) {
2530 sub git_print_authorship {
2531         my $co = shift;
2532
2533         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2534         print "<div class=\"author_date\">" .
2535               esc_html($co->{'author_name'}) .
2536               " [$ad{'rfc2822'}";
2537         if ($ad{'hour_local'} < 6) {
2538                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2539                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2540         } else {
2541                 printf(" (%02d:%02d %s)",
2542                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2543         }
2544         print "]</div>\n";
2545 }
2546
2547 sub git_print_page_path {
2548         my $name = shift;
2549         my $type = shift;
2550         my $hb = shift;
2551
2552
2553         print "<div class=\"page_path\">";
2554         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2555                       -title => 'tree root'}, to_utf8("[$project]"));
2556         print " / ";
2557         if (defined $name) {
2558                 my @dirname = split '/', $name;
2559                 my $basename = pop @dirname;
2560                 my $fullname = '';
2561
2562                 foreach my $dir (@dirname) {
2563                         $fullname .= ($fullname ? '/' : '') . $dir;
2564                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2565                                                      hash_base=>$hb),
2566                                       -title => $fullname}, esc_path($dir));
2567                         print " / ";
2568                 }
2569                 if (defined $type && $type eq 'blob') {
2570                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2571                                                      hash_base=>$hb),
2572                                       -title => $name}, esc_path($basename));
2573                 } elsif (defined $type && $type eq 'tree') {
2574                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2575                                                      hash_base=>$hb),
2576                                       -title => $name}, esc_path($basename));
2577                         print " / ";
2578                 } else {
2579                         print esc_path($basename);
2580                 }
2581         }
2582         print "<br/></div>\n";
2583 }
2584
2585 # sub git_print_log (\@;%) {
2586 sub git_print_log ($;%) {
2587         my $log = shift;
2588         my %opts = @_;
2589
2590         if ($opts{'-remove_title'}) {
2591                 # remove title, i.e. first line of log
2592                 shift @$log;
2593         }
2594         # remove leading empty lines
2595         while (defined $log->[0] && $log->[0] eq "") {
2596                 shift @$log;
2597         }
2598
2599         # print log
2600         my $signoff = 0;
2601         my $empty = 0;
2602         foreach my $line (@$log) {
2603                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2604                         $signoff = 1;
2605                         $empty = 0;
2606                         if (! $opts{'-remove_signoff'}) {
2607                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2608                                 next;
2609                         } else {
2610                                 # remove signoff lines
2611                                 next;
2612                         }
2613                 } else {
2614                         $signoff = 0;
2615                 }
2616
2617                 # print only one empty line
2618                 # do not print empty line after signoff
2619                 if ($line eq "") {
2620                         next if ($empty || $signoff);
2621                         $empty = 1;
2622                 } else {
2623                         $empty = 0;
2624                 }
2625
2626                 print format_log_line_html($line) . "<br/>\n";
2627         }
2628
2629         if ($opts{'-final_empty_line'}) {
2630                 # end with single empty line
2631                 print "<br/>\n" unless $empty;
2632         }
2633 }
2634
2635 # return link target (what link points to)
2636 sub git_get_link_target {
2637         my $hash = shift;
2638         my $link_target;
2639
2640         # read link
2641         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2642                 or return;
2643         {
2644                 local $/;
2645                 $link_target = <$fd>;
2646         }
2647         close $fd
2648                 or return;
2649
2650         return $link_target;
2651 }
2652
2653 # given link target, and the directory (basedir) the link is in,
2654 # return target of link relative to top directory (top tree);
2655 # return undef if it is not possible (including absolute links).
2656 sub normalize_link_target {
2657         my ($link_target, $basedir, $hash_base) = @_;
2658
2659         # we can normalize symlink target only if $hash_base is provided
2660         return unless $hash_base;
2661
2662         # absolute symlinks (beginning with '/') cannot be normalized
2663         return if (substr($link_target, 0, 1) eq '/');
2664
2665         # normalize link target to path from top (root) tree (dir)
2666         my $path;
2667         if ($basedir) {
2668                 $path = $basedir . '/' . $link_target;
2669         } else {
2670                 # we are in top (root) tree (dir)
2671                 $path = $link_target;
2672         }
2673
2674         # remove //, /./, and /../
2675         my @path_parts;
2676         foreach my $part (split('/', $path)) {
2677                 # discard '.' and ''
2678                 next if (!$part || $part eq '.');
2679                 # handle '..'
2680                 if ($part eq '..') {
2681                         if (@path_parts) {
2682                                 pop @path_parts;
2683                         } else {
2684                                 # link leads outside repository (outside top dir)
2685                                 return;
2686                         }
2687                 } else {
2688                         push @path_parts, $part;
2689                 }
2690         }
2691         $path = join('/', @path_parts);
2692
2693         return $path;
2694 }
2695
2696 # print tree entry (row of git_tree), but without encompassing <tr> element
2697 sub git_print_tree_entry {
2698         my ($t, $basedir, $hash_base, $have_blame) = @_;
2699
2700         my %base_key = ();
2701         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2702
2703         # The format of a table row is: mode list link.  Where mode is
2704         # the mode of the entry, list is the name of the entry, an href,
2705         # and link is the action links of the entry.
2706
2707         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2708         if ($t->{'type'} eq "blob") {
2709                 print "<td class=\"list\">" .
2710                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2711                                                file_name=>"$basedir$t->{'name'}", %base_key),
2712                                 -class => "list"}, esc_path($t->{'name'}));
2713                 if (S_ISLNK(oct $t->{'mode'})) {
2714                         my $link_target = git_get_link_target($t->{'hash'});
2715                         if ($link_target) {
2716                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2717                                 if (defined $norm_target) {
2718                                         print " -> " .
2719                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2720                                                                      file_name=>$norm_target),
2721                                                        -title => $norm_target}, esc_path($link_target));
2722                                 } else {
2723                                         print " -> " . esc_path($link_target);
2724                                 }
2725                         }
2726                 }
2727                 print "</td>\n";
2728                 print "<td class=\"link\">";
2729                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2730                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2731                               "blob");
2732                 if ($have_blame) {
2733                         print " | " .
2734                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2735                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2736                                       "blame");
2737                 }
2738                 if (defined $hash_base) {
2739                         print " | " .
2740                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2741                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2742                                       "history");
2743                 }
2744                 print " | " .
2745                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2746                                                file_name=>"$basedir$t->{'name'}")},
2747                                 "raw");
2748                 print "</td>\n";
2749
2750         } elsif ($t->{'type'} eq "tree") {
2751                 print "<td class=\"list\">";
2752                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2753                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2754                               esc_path($t->{'name'}));
2755                 print "</td>\n";
2756                 print "<td class=\"link\">";
2757                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2758                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2759                               "tree");
2760                 if (defined $hash_base) {
2761                         print " | " .
2762                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2763                                                      file_name=>"$basedir$t->{'name'}")},
2764                                       "history");
2765                 }
2766                 print "</td>\n";
2767         } else {
2768                 # unknown object: we can only present history for it
2769                 # (this includes 'commit' object, i.e. submodule support)
2770                 print "<td class=\"list\">" .
2771                       esc_path($t->{'name'}) .
2772                       "</td>\n";
2773                 print "<td class=\"link\">";
2774                 if (defined $hash_base) {
2775                         print $cgi->a({-href => href(action=>"history",
2776                                                      hash_base=>$hash_base,
2777                                                      file_name=>"$basedir$t->{'name'}")},
2778                                       "history");
2779                 }
2780                 print "</td>\n";
2781         }
2782 }
2783
2784 ## ......................................................................
2785 ## functions printing large fragments of HTML
2786
2787 sub fill_from_file_info {
2788         my ($diff, @parents) = @_;
2789
2790         $diff->{'from_file'} = [ ];
2791         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2792         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2793                 if ($diff->{'status'}[$i] eq 'R' ||
2794                     $diff->{'status'}[$i] eq 'C') {
2795                         $diff->{'from_file'}[$i] =
2796                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2797                 }
2798         }
2799
2800         return $diff;
2801 }
2802
2803 # parameters can be strings, or references to arrays of strings
2804 sub from_ids_eq {
2805         my ($a, $b) = @_;
2806
2807         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2808                 for (my $i = 0; $i < @$a; ++$i) {
2809                         return 0 unless ($a->[$i] eq $b->[$i]);
2810                 }
2811                 return 1;
2812         } elsif (!ref($a) && !ref($b)) {
2813                 return $a eq $b;
2814         } else {
2815                 return 0;
2816         }
2817 }
2818
2819 sub is_deleted {
2820         my $diffinfo = shift;
2821
2822         return $diffinfo->{'to_id'} eq ('0' x 40);
2823 }
2824
2825 sub git_difftree_body {
2826         my ($difftree, $hash, @parents) = @_;
2827         my ($parent) = $parents[0];
2828         my ($have_blame) = gitweb_check_feature('blame');
2829         print "<div class=\"list_head\">\n";
2830         if ($#{$difftree} > 10) {
2831                 print(($#{$difftree} + 1) . " files changed:\n");
2832         }
2833         print "</div>\n";
2834
2835         print "<table class=\"" .
2836               (@parents > 1 ? "combined " : "") .
2837               "diff_tree\">\n";
2838
2839         # header only for combined diff in 'commitdiff' view
2840         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2841         if ($has_header) {
2842                 # table header
2843                 print "<thead><tr>\n" .
2844                        "<th></th><th></th>\n"; # filename, patchN link
2845                 for (my $i = 0; $i < @parents; $i++) {
2846                         my $par = $parents[$i];
2847                         print "<th>" .
2848                               $cgi->a({-href => href(action=>"commitdiff",
2849                                                      hash=>$hash, hash_parent=>$par),
2850                                        -title => 'commitdiff to parent number ' .
2851                                                   ($i+1) . ': ' . substr($par,0,7)},
2852                                       $i+1) .
2853                               "&nbsp;</th>\n";
2854                 }
2855                 print "</tr></thead>\n<tbody>\n";
2856         }
2857
2858         my $alternate = 1;
2859         my $patchno = 0;
2860         foreach my $line (@{$difftree}) {
2861                 my $diff;
2862                 if (ref($line) eq "HASH") {
2863                         # pre-parsed (or generated by hand)
2864                         $diff = $line;
2865                 } else {
2866                         $diff = parse_difftree_raw_line($line);
2867                 }
2868
2869                 if ($alternate) {
2870                         print "<tr class=\"dark\">\n";
2871                 } else {
2872                         print "<tr class=\"light\">\n";
2873                 }
2874                 $alternate ^= 1;
2875
2876                 if (exists $diff->{'nparents'}) { # combined diff
2877
2878                         fill_from_file_info($diff, @parents)
2879                                 unless exists $diff->{'from_file'};
2880
2881                         if (!is_deleted($diff)) {
2882                                 # file exists in the result (child) commit
2883                                 print "<td>" .
2884                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2885                                                              file_name=>$diff->{'to_file'},
2886                                                              hash_base=>$hash),
2887                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2888                                       "</td>\n";
2889                         } else {
2890                                 print "<td>" .
2891                                       esc_path($diff->{'to_file'}) .
2892                                       "</td>\n";
2893                         }
2894
2895                         if ($action eq 'commitdiff') {
2896                                 # link to patch
2897                                 $patchno++;
2898                                 print "<td class=\"link\">" .
2899                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2900                                       " | " .
2901                                       "</td>\n";
2902                         }
2903
2904                         my $has_history = 0;
2905                         my $not_deleted = 0;
2906                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2907                                 my $hash_parent = $parents[$i];
2908                                 my $from_hash = $diff->{'from_id'}[$i];
2909                                 my $from_path = $diff->{'from_file'}[$i];
2910                                 my $status = $diff->{'status'}[$i];
2911
2912                                 $has_history ||= ($status ne 'A');
2913                                 $not_deleted ||= ($status ne 'D');
2914
2915                                 if ($status eq 'A') {
2916                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2917                                 } elsif ($status eq 'D') {
2918                                         print "<td class=\"link\">" .
2919                                               $cgi->a({-href => href(action=>"blob",
2920                                                                      hash_base=>$hash,
2921                                                                      hash=>$from_hash,
2922                                                                      file_name=>$from_path)},
2923                                                       "blob" . ($i+1)) .
2924                                               " | </td>\n";
2925                                 } else {
2926                                         if ($diff->{'to_id'} eq $from_hash) {
2927                                                 print "<td class=\"link nochange\">";
2928                                         } else {
2929                                                 print "<td class=\"link\">";
2930                                         }
2931                                         print $cgi->a({-href => href(action=>"blobdiff",
2932                                                                      hash=>$diff->{'to_id'},
2933                                                                      hash_parent=>$from_hash,
2934                                                                      hash_base=>$hash,
2935                                                                      hash_parent_base=>$hash_parent,
2936                                                                      file_name=>$diff->{'to_file'},
2937                                                                      file_parent=>$from_path)},
2938                                                       "diff" . ($i+1)) .
2939                                               " | </td>\n";
2940                                 }
2941                         }
2942
2943                         print "<td class=\"link\">";
2944                         if ($not_deleted) {
2945                                 print $cgi->a({-href => href(action=>"blob",
2946                                                              hash=>$diff->{'to_id'},
2947                                                              file_name=>$diff->{'to_file'},
2948                                                              hash_base=>$hash)},
2949                                               "blob");
2950                                 print " | " if ($has_history);
2951                         }
2952                         if ($has_history) {
2953                                 print $cgi->a({-href => href(action=>"history",
2954                                                              file_name=>$diff->{'to_file'},
2955                                                              hash_base=>$hash)},
2956                                               "history");
2957                         }
2958                         print "</td>\n";
2959
2960                         print "</tr>\n";
2961                         next; # instead of 'else' clause, to avoid extra indent
2962                 }
2963                 # else ordinary diff
2964
2965                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2966                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2967                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2968                         $to_mode_oct = oct $diff->{'to_mode'};
2969                         if (S_ISREG($to_mode_oct)) { # only for regular file
2970                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2971                         }
2972                         $to_file_type = file_type($diff->{'to_mode'});
2973                 }
2974                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2975                         $from_mode_oct = oct $diff->{'from_mode'};
2976                         if (S_ISREG($to_mode_oct)) { # only for regular file
2977                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2978                         }
2979                         $from_file_type = file_type($diff->{'from_mode'});
2980                 }
2981
2982                 if ($diff->{'status'} eq "A") { # created
2983                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2984                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2985                         $mode_chng   .= "]</span>";
2986                         print "<td>";
2987                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2988                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2989                                       -class => "list"}, esc_path($diff->{'file'}));
2990                         print "</td>\n";
2991                         print "<td>$mode_chng</td>\n";
2992                         print "<td class=\"link\">";
2993                         if ($action eq 'commitdiff') {
2994                                 # link to patch
2995                                 $patchno++;
2996                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2997                                 print " | ";
2998                         }
2999                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3000                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3001                                       "blob");
3002                         print "</td>\n";
3003
3004                 } elsif ($diff->{'status'} eq "D") { # deleted
3005                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3006                         print "<td>";
3007                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3008                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3009                                        -class => "list"}, esc_path($diff->{'file'}));
3010                         print "</td>\n";
3011                         print "<td>$mode_chng</td>\n";
3012                         print "<td class=\"link\">";
3013                         if ($action eq 'commitdiff') {
3014                                 # link to patch
3015                                 $patchno++;
3016                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3017                                 print " | ";
3018                         }
3019                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3020                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3021                                       "blob") . " | ";
3022                         if ($have_blame) {
3023                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3024                                                              file_name=>$diff->{'file'})},
3025                                               "blame") . " | ";
3026                         }
3027                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3028                                                      file_name=>$diff->{'file'})},
3029                                       "history");
3030                         print "</td>\n";
3031
3032                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3033                         my $mode_chnge = "";
3034                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3035                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3036                                 if ($from_file_type ne $to_file_type) {
3037                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3038                                 }
3039                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3040                                         if ($from_mode_str && $to_mode_str) {
3041                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3042                                         } elsif ($to_mode_str) {
3043                                                 $mode_chnge .= " mode: $to_mode_str";
3044                                         }
3045                                 }
3046                                 $mode_chnge .= "]</span>\n";
3047                         }
3048                         print "<td>";
3049                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3050                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3051                                       -class => "list"}, esc_path($diff->{'file'}));
3052                         print "</td>\n";
3053                         print "<td>$mode_chnge</td>\n";
3054                         print "<td class=\"link\">";
3055                         if ($action eq 'commitdiff') {
3056                                 # link to patch
3057                                 $patchno++;
3058                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3059                                       " | ";
3060                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3061                                 # "commit" view and modified file (not onlu mode changed)
3062                                 print $cgi->a({-href => href(action=>"blobdiff",
3063                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3064                                                              hash_base=>$hash, hash_parent_base=>$parent,
3065                                                              file_name=>$diff->{'file'})},
3066                                               "diff") .
3067                                       " | ";
3068                         }
3069                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3070                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3071                                        "blob") . " | ";
3072                         if ($have_blame) {
3073                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3074                                                              file_name=>$diff->{'file'})},
3075                                               "blame") . " | ";
3076                         }
3077                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3078                                                      file_name=>$diff->{'file'})},
3079                                       "history");
3080                         print "</td>\n";
3081
3082                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3083                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3084                         my $nstatus = $status_name{$diff->{'status'}};
3085                         my $mode_chng = "";
3086                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3087                                 # mode also for directories, so we cannot use $to_mode_str
3088                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3089                         }
3090                         print "<td>" .
3091                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3092                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3093                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3094                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3095                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3096                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3097                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3098                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3099                               "<td class=\"link\">";
3100                         if ($action eq 'commitdiff') {
3101                                 # link to patch
3102                                 $patchno++;
3103                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3104                                       " | ";
3105                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3106                                 # "commit" view and modified file (not only pure rename or copy)
3107                                 print $cgi->a({-href => href(action=>"blobdiff",
3108                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3109                                                              hash_base=>$hash, hash_parent_base=>$parent,
3110                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3111                                               "diff") .
3112                                       " | ";
3113                         }
3114                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3115                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3116                                       "blob") . " | ";
3117                         if ($have_blame) {
3118                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3119                                                              file_name=>$diff->{'to_file'})},
3120                                               "blame") . " | ";
3121                         }
3122                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3123                                                     file_name=>$diff->{'to_file'})},
3124                                       "history");
3125                         print "</td>\n";
3126
3127                 } # we should not encounter Unmerged (U) or Unknown (X) status
3128                 print "</tr>\n";
3129         }
3130         print "</tbody>" if $has_header;
3131         print "</table>\n";
3132 }
3133
3134 sub git_patchset_body {
3135         my ($fd, $difftree, $hash, @hash_parents) = @_;
3136         my ($hash_parent) = $hash_parents[0];
3137
3138         my $patch_idx = 0;
3139         my $patch_number = 0;
3140         my $patch_line;
3141         my $diffinfo;
3142         my (%from, %to);
3143
3144         print "<div class=\"patchset\">\n";
3145
3146         # skip to first patch
3147         while ($patch_line = <$fd>) {
3148                 chomp $patch_line;
3149
3150                 last if ($patch_line =~ m/^diff /);
3151         }
3152
3153  PATCH:
3154         while ($patch_line) {
3155                 my @diff_header;
3156                 my ($from_id, $to_id);
3157
3158                 # git diff header
3159                 #assert($patch_line =~ m/^diff /) if DEBUG;
3160                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3161                 $patch_number++;
3162                 push @diff_header, $patch_line;
3163
3164                 # extended diff header
3165         EXTENDED_HEADER:
3166                 while ($patch_line = <$fd>) {
3167                         chomp $patch_line;
3168
3169                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3170
3171                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3172                                 $from_id = $1;
3173                                 $to_id   = $2;
3174                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3175                                 $from_id = [ split(',', $1) ];
3176                                 $to_id   = $2;
3177                         }
3178
3179                         push @diff_header, $patch_line;
3180                 }
3181                 my $last_patch_line = $patch_line;
3182
3183                 # check if current patch belong to current raw line
3184                 # and parse raw git-diff line if needed
3185                 if (defined $diffinfo &&
3186                     defined $from_id && defined $to_id &&
3187                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3188                     $diffinfo->{'to_id'} eq $to_id) {
3189                         # this is continuation of a split patch
3190                         print "<div class=\"patch cont\">\n";
3191                 } else {
3192                         # advance raw git-diff output if needed
3193                         $patch_idx++ if defined $diffinfo;
3194
3195                         # compact combined diff output can have some patches skipped
3196                         # find which patch (using pathname of result) we are at now
3197                         my $to_name;
3198                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3199                                 $to_name = $1;
3200                         }
3201
3202                         do {
3203                                 # read and prepare patch information
3204                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3205                                         # pre-parsed (or generated by hand)
3206                                         $diffinfo = $difftree->[$patch_idx];
3207                                 } else {
3208                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3209                                 }
3210
3211                                 # check if current raw line has no patch (it got simplified)
3212                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3213                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3214                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3215                                               "</div>\n";  # class="patch"
3216
3217                                         $patch_idx++;
3218                                         $patch_number++;
3219                                 }
3220                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3221                                  $patch_idx > $#$difftree);
3222
3223                         # modifies %from, %to hashes
3224                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3225
3226                         # this is first patch for raw difftree line with $patch_idx index
3227                         # we index @$difftree array from 0, but number patches from 1
3228                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3229                 }
3230
3231                 # print "git diff" header
3232                 $patch_line = shift @diff_header;
3233                 print format_git_diff_header_line($patch_line, $diffinfo,
3234                                                   \%from, \%to);
3235
3236                 # print extended diff header
3237                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3238         EXTENDED_HEADER:
3239                 foreach $patch_line (@diff_header) {
3240                         print format_extended_diff_header_line($patch_line, $diffinfo,
3241                                                                \%from, \%to);
3242                 }
3243                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3244
3245                 # from-file/to-file diff header
3246                 $patch_line = $last_patch_line;
3247                 if (! $patch_line) {
3248                         print "</div>\n"; # class="patch"
3249                         last PATCH;
3250                 }
3251                 next PATCH if ($patch_line =~ m/^diff /);
3252                 #assert($patch_line =~ m/^---/) if DEBUG;
3253                 #assert($patch_line eq $last_patch_line) if DEBUG;
3254
3255                 $patch_line = <$fd>;
3256                 chomp $patch_line;
3257                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3258
3259                 print format_diff_from_to_header($last_patch_line, $patch_line,
3260                                                  $diffinfo, \%from, \%to,
3261                                                  @hash_parents);
3262
3263                 # the patch itself
3264         LINE:
3265                 while ($patch_line = <$fd>) {
3266                         chomp $patch_line;
3267
3268                         next PATCH if ($patch_line =~ m/^diff /);
3269
3270                         print format_diff_line($patch_line, \%from, \%to);
3271                 }
3272
3273         } continue {
3274                 print "</div>\n"; # class="patch"
3275         }
3276
3277         # for compact combined (--cc) format, with chunk and patch simpliciaction
3278         # patchset might be empty, but there might be unprocessed raw lines
3279         for ($patch_idx++ if $patch_number > 0;
3280              $patch_idx < @$difftree;
3281              $patch_idx++) {
3282                 # read and prepare patch information
3283                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3284                         # pre-parsed (or generated by hand)
3285                         $diffinfo = $difftree->[$patch_idx];
3286                 } else {
3287                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3288                 }
3289
3290                 # generate anchor for "patch" links in difftree / whatchanged part
3291                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3292                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3293                       "</div>\n";  # class="patch"
3294
3295                 $patch_number++;
3296         }
3297
3298         if ($patch_number == 0) {
3299                 if (@hash_parents > 1) {
3300                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3301                 } else {
3302                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3303                 }
3304         }
3305
3306         print "</div>\n"; # class="patchset"
3307 }
3308
3309 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3310
3311 sub git_project_list_body {
3312         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3313
3314         my ($check_forks) = gitweb_check_feature('forks');
3315
3316         my @projects;
3317         foreach my $pr (@$projlist) {
3318                 my (@aa) = git_get_last_activity($pr->{'path'});
3319                 unless (@aa) {
3320                         next;
3321                 }
3322                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3323                 if (!defined $pr->{'descr'}) {
3324                         my $descr = git_get_project_description($pr->{'path'}) || "";
3325                         $pr->{'descr_long'} = to_utf8($descr);
3326                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3327                 }
3328                 if (!defined $pr->{'owner'}) {
3329                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3330                 }
3331                 if ($check_forks) {
3332                         my $pname = $pr->{'path'};
3333                         if (($pname =~ s/\.git$//) &&
3334                             ($pname !~ /\/$/) &&
3335                             (-d "$projectroot/$pname")) {
3336                                 $pr->{'forks'} = "-d $projectroot/$pname";
3337                         }
3338                         else {
3339                                 $pr->{'forks'} = 0;
3340                         }
3341                 }
3342                 push @projects, $pr;
3343         }
3344
3345         $order ||= $default_projects_order;
3346         $from = 0 unless defined $from;
3347         $to = $#projects if (!defined $to || $#projects < $to);
3348
3349         print "<table class=\"project_list\">\n";
3350         unless ($no_header) {
3351                 print "<tr>\n";
3352                 if ($check_forks) {
3353                         print "<th></th>\n";
3354                 }
3355                 if ($order eq "project") {
3356                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3357                         print "<th>Project</th>\n";
3358                 } else {
3359                         print "<th>" .
3360                               $cgi->a({-href => href(project=>undef, order=>'project'),
3361                                        -class => "header"}, "Project") .
3362                               "</th>\n";
3363                 }
3364                 if ($order eq "descr") {
3365                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3366                         print "<th>Description</th>\n";
3367                 } else {
3368                         print "<th>" .
3369                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3370                                        -class => "header"}, "Description") .
3371                               "</th>\n";
3372                 }
3373                 if ($order eq "owner") {
3374                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3375                         print "<th>Owner</th>\n";
3376                 } else {
3377                         print "<th>" .
3378                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3379                                        -class => "header"}, "Owner") .
3380                               "</th>\n";
3381                 }
3382                 if ($order eq "age") {
3383                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3384                         print "<th>Last Change</th>\n";
3385                 } else {
3386                         print "<th>" .
3387                               $cgi->a({-href => href(project=>undef, order=>'age'),
3388                                        -class => "header"}, "Last Change") .
3389                               "</th>\n";
3390                 }
3391                 print "<th></th>\n" .
3392                       "</tr>\n";
3393         }
3394         my $alternate = 1;
3395         for (my $i = $from; $i <= $to; $i++) {
3396                 my $pr = $projects[$i];
3397                 if ($alternate) {
3398                         print "<tr class=\"dark\">\n";
3399                 } else {
3400                         print "<tr class=\"light\">\n";
3401                 }
3402                 $alternate ^= 1;
3403                 if ($check_forks) {
3404                         print "<td>";
3405                         if ($pr->{'forks'}) {
3406                                 print "<!-- $pr->{'forks'} -->\n";
3407                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3408                         }
3409                         print "</td>\n";
3410                 }
3411                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3412                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3413                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3414                                         -class => "list", -title => $pr->{'descr_long'}},
3415                                         esc_html($pr->{'descr'})) . "</td>\n" .
3416                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3417                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3418                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3419                       "<td class=\"link\">" .
3420                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3421                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3422                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3423                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3424                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3425                       "</td>\n" .
3426                       "</tr>\n";
3427         }
3428         if (defined $extra) {
3429                 print "<tr>\n";
3430                 if ($check_forks) {
3431                         print "<td></td>\n";
3432                 }
3433                 print "<td colspan=\"5\">$extra</td>\n" .
3434                       "</tr>\n";
3435         }
3436         print "</table>\n";
3437 }
3438
3439 sub git_shortlog_body {
3440         # uses global variable $project
3441         my ($commitlist, $from, $to, $refs, $extra) = @_;
3442
3443         $from = 0 unless defined $from;
3444         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3445
3446         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3447         my $alternate = 1;
3448         for (my $i = $from; $i <= $to; $i++) {
3449                 my %co = %{$commitlist->[$i]};
3450                 my $commit = $co{'id'};
3451                 my $ref = format_ref_marker($refs, $commit);
3452                 if ($alternate) {
3453                         print "<tr class=\"dark\">\n";
3454                 } else {
3455                         print "<tr class=\"light\">\n";
3456                 }
3457                 $alternate ^= 1;
3458                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3459                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3460                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3461                       "<td><i>" . $author . "</i></td>\n" .
3462                       "<td>";
3463                 print format_subject_html($co{'title'}, $co{'title_short'},
3464                                           href(action=>"commit", hash=>$commit), $ref);
3465                 print "</td>\n" .
3466                       "<td class=\"link\">" .
3467                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3468                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3469                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3470                 my $snapshot_links = format_snapshot_links($commit);
3471                 if (defined $snapshot_links) {
3472                         print " | " . $snapshot_links;
3473                 }
3474                 print "</td>\n" .
3475                       "</tr>\n";
3476         }
3477         if (defined $extra) {
3478                 print "<tr>\n" .
3479                       "<td colspan=\"4\">$extra</td>\n" .
3480                       "</tr>\n";
3481         }
3482         print "</table>\n";
3483 }
3484
3485 sub git_history_body {
3486         # Warning: assumes constant type (blob or tree) during history
3487         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3488
3489         $from = 0 unless defined $from;
3490         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3491
3492         print "<table class=\"history\" cellspacing=\"0\">\n";
3493         my $alternate = 1;
3494         for (my $i = $from; $i <= $to; $i++) {
3495                 my %co = %{$commitlist->[$i]};
3496                 if (!%co) {
3497                         next;
3498                 }
3499                 my $commit = $co{'id'};
3500
3501                 my $ref = format_ref_marker($refs, $commit);
3502
3503                 if ($alternate) {
3504                         print "<tr class=\"dark\">\n";
3505                 } else {
3506                         print "<tr class=\"light\">\n";
3507                 }
3508                 $alternate ^= 1;
3509         # shortlog uses      chop_str($co{'author_name'}, 10)
3510                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3511                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3512                       "<td><i>" . $author . "</i></td>\n" .
3513                       "<td>";
3514                 # originally git_history used chop_str($co{'title'}, 50)
3515                 print format_subject_html($co{'title'}, $co{'title_short'},
3516                                           href(action=>"commit", hash=>$commit), $ref);
3517                 print "</td>\n" .
3518                       "<td class=\"link\">" .
3519                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3520                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3521
3522                 if ($ftype eq 'blob') {
3523                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3524                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3525                         if (defined $blob_current && defined $blob_parent &&
3526                                         $blob_current ne $blob_parent) {
3527                                 print " | " .
3528                                         $cgi->a({-href => href(action=>"blobdiff",
3529                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3530                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3531                                                                file_name=>$file_name)},
3532                                                 "diff to current");
3533                         }
3534                 }
3535                 print "</td>\n" .
3536                       "</tr>\n";
3537         }
3538         if (defined $extra) {
3539                 print "<tr>\n" .
3540                       "<td colspan=\"4\">$extra</td>\n" .
3541                       "</tr>\n";
3542         }
3543         print "</table>\n";
3544 }
3545
3546 sub git_tags_body {
3547         # uses global variable $project
3548         my ($taglist, $from, $to, $extra) = @_;
3549         $from = 0 unless defined $from;
3550         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3551
3552         print "<table class=\"tags\" cellspacing=\"0\">\n";
3553         my $alternate = 1;
3554         for (my $i = $from; $i <= $to; $i++) {
3555                 my $entry = $taglist->[$i];
3556                 my %tag = %$entry;
3557                 my $comment = $tag{'subject'};
3558                 my $comment_short;
3559                 if (defined $comment) {
3560                         $comment_short = chop_str($comment, 30, 5);
3561                 }
3562                 if ($alternate) {
3563                         print "<tr class=\"dark\">\n";
3564                 } else {
3565                         print "<tr class=\"light\">\n";
3566                 }
3567                 $alternate ^= 1;
3568                 if (defined $tag{'age'}) {
3569                         print "<td><i>$tag{'age'}</i></td>\n";
3570                 } else {
3571                         print "<td></td>\n";
3572                 }
3573                 print "<td>" .
3574                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3575                                -class => "list name"}, esc_html($tag{'name'})) .
3576                       "</td>\n" .
3577                       "<td>";
3578                 if (defined $comment) {
3579                         print format_subject_html($comment, $comment_short,
3580                                                   href(action=>"tag", hash=>$tag{'id'}));
3581                 }
3582                 print "</td>\n" .
3583                       "<td class=\"selflink\">";
3584                 if ($tag{'type'} eq "tag") {
3585                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3586                 } else {
3587                         print "&nbsp;";
3588                 }
3589                 print "</td>\n" .
3590                       "<td class=\"link\">" . " | " .
3591                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3592                 if ($tag{'reftype'} eq "commit") {
3593                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3594                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3595                 } elsif ($tag{'reftype'} eq "blob") {
3596                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3597                 }
3598                 print "</td>\n" .
3599                       "</tr>";
3600         }
3601         if (defined $extra) {
3602                 print "<tr>\n" .
3603                       "<td colspan=\"5\">$extra</td>\n" .
3604                       "</tr>\n";
3605         }
3606         print "</table>\n";
3607 }
3608
3609 sub git_heads_body {
3610         # uses global variable $project
3611         my ($headlist, $head, $from, $to, $extra) = @_;
3612         $from = 0 unless defined $from;
3613         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3614
3615         print "<table class=\"heads\" cellspacing=\"0\">\n";
3616         my $alternate = 1;
3617         for (my $i = $from; $i <= $to; $i++) {
3618                 my $entry = $headlist->[$i];
3619                 my %ref = %$entry;
3620                 my $curr = $ref{'id'} eq $head;
3621                 if ($alternate) {
3622                         print "<tr class=\"dark\">\n";
3623                 } else {
3624                         print "<tr class=\"light\">\n";
3625                 }
3626                 $alternate ^= 1;
3627                 print "<td><i>$ref{'age'}</i></td>\n" .
3628                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3629                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3630                                -class => "list name"},esc_html($ref{'name'})) .
3631                       "</td>\n" .
3632                       "<td class=\"link\">" .
3633                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3634                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3635                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3636                       "</td>\n" .
3637                       "</tr>";
3638         }
3639         if (defined $extra) {
3640                 print "<tr>\n" .
3641                       "<td colspan=\"3\">$extra</td>\n" .
3642                       "</tr>\n";
3643         }
3644         print "</table>\n";
3645 }
3646
3647 sub git_search_grep_body {
3648         my ($commitlist, $from, $to, $extra) = @_;
3649         $from = 0 unless defined $from;
3650         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3651
3652         print "<table class=\"grep\" cellspacing=\"0\">\n";
3653         my $alternate = 1;
3654         for (my $i = $from; $i <= $to; $i++) {
3655                 my %co = %{$commitlist->[$i]};
3656                 if (!%co) {
3657                         next;
3658                 }
3659                 my $commit = $co{'id'};
3660                 if ($alternate) {
3661                         print "<tr class=\"dark\">\n";
3662                 } else {
3663                         print "<tr class=\"light\">\n";
3664                 }
3665                 $alternate ^= 1;
3666                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3667                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3668                       "<td><i>" . $author . "</i></td>\n" .
3669                       "<td>" .
3670                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3671                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3672                 my $comment = $co{'comment'};
3673                 foreach my $line (@$comment) {
3674                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3675                                 my $lead = esc_html($1) || "";
3676                                 $lead = chop_str($lead, 30, 10);
3677                                 my $match = esc_html($2) || "";
3678                                 my $trail = esc_html($3) || "";
3679                                 $trail = chop_str($trail, 30, 10);
3680                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3681                                 print chop_str($text, 80, 5) . "<br/>\n";
3682                         }
3683                 }
3684                 print "</td>\n" .
3685                       "<td class=\"link\">" .
3686                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3687                       " | " .
3688                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3689                 print "</td>\n" .
3690                       "</tr>\n";
3691         }
3692         if (defined $extra) {
3693                 print "<tr>\n" .
3694                       "<td colspan=\"3\">$extra</td>\n" .
3695                       "</tr>\n";
3696         }
3697         print "</table>\n";
3698 }
3699
3700 ## ======================================================================
3701 ## ======================================================================
3702 ## actions
3703
3704 sub git_project_list {
3705         my $order = $cgi->param('o');
3706         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3707                 die_error(undef, "Unknown order parameter");
3708         }
3709
3710         my @list = git_get_projects_list();
3711         if (!@list) {
3712                 die_error(undef, "No projects found");
3713         }
3714
3715         git_header_html();
3716         if (-f $home_text) {
3717                 print "<div class=\"index_include\">\n";
3718                 open (my $fd, $home_text);
3719                 print <$fd>;
3720                 close $fd;
3721                 print "</div>\n";
3722         }
3723         git_project_list_body(\@list, $order);
3724         git_footer_html();
3725 }
3726
3727 sub git_forks {
3728         my $order = $cgi->param('o');
3729         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3730                 die_error(undef, "Unknown order parameter");
3731         }
3732
3733         my @list = git_get_projects_list($project);
3734         if (!@list) {
3735                 die_error(undef, "No forks found");
3736         }
3737
3738         git_header_html();
3739         git_print_page_nav('','');
3740         git_print_header_div('summary', "$project forks");
3741         git_project_list_body(\@list, $order);
3742         git_footer_html();
3743 }
3744
3745 sub git_project_index {
3746         my @projects = git_get_projects_list($project);
3747
3748         print $cgi->header(
3749                 -type => 'text/plain',
3750                 -charset => 'utf-8',
3751                 -content_disposition => 'inline; filename="index.aux"');
3752
3753         foreach my $pr (@projects) {
3754                 if (!exists $pr->{'owner'}) {
3755                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3756                 }
3757
3758                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3759                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3760                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3761                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3762                 $path  =~ s/ /\+/g;
3763                 $owner =~ s/ /\+/g;
3764
3765                 print "$path $owner\n";
3766         }
3767 }
3768
3769 sub git_summary {
3770         my $descr = git_get_project_description($project) || "none";
3771         my %co = parse_commit("HEAD");
3772         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3773         my $head = $co{'id'};
3774
3775         my $owner = git_get_project_owner($project);
3776
3777         my $refs = git_get_references();
3778         # These get_*_list functions return one more to allow us to see if
3779         # there are more ...
3780         my @taglist  = git_get_tags_list(16);
3781         my @headlist = git_get_heads_list(16);
3782         my @forklist;
3783         my ($check_forks) = gitweb_check_feature('forks');
3784
3785         if ($check_forks) {
3786                 @forklist = git_get_projects_list($project);
3787         }
3788
3789         git_header_html();
3790         git_print_page_nav('summary','', $head);
3791
3792         print "<div class=\"title\">&nbsp;</div>\n";
3793         print "<table cellspacing=\"0\">\n" .
3794               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3795               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3796         if (defined $cd{'rfc2822'}) {
3797                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3798         }
3799
3800         # use per project git URL list in $projectroot/$project/cloneurl
3801         # or make project git URL from git base URL and project name
3802         my $url_tag = "URL";
3803         my @url_list = git_get_project_url_list($project);
3804         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3805         foreach my $git_url (@url_list) {
3806                 next unless $git_url;
3807                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3808                 $url_tag = "";
3809         }
3810         print "</table>\n";
3811
3812         if (-s "$projectroot/$project/README.html") {
3813                 if (open my $fd, "$projectroot/$project/README.html") {
3814                         print "<div class=\"title\">readme</div>\n";
3815                         print $_ while (<$fd>);
3816                         close $fd;
3817                 }
3818         }
3819
3820         # we need to request one more than 16 (0..15) to check if
3821         # those 16 are all
3822         my @commitlist = $head ? parse_commits($head, 17) : ();
3823         if (@commitlist) {
3824                 git_print_header_div('shortlog');
3825                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3826                                   $#commitlist <=  15 ? undef :
3827                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3828         }
3829
3830         if (@taglist) {
3831                 git_print_header_div('tags');
3832                 git_tags_body(\@taglist, 0, 15,
3833                               $#taglist <=  15 ? undef :
3834                               $cgi->a({-href => href(action=>"tags")}, "..."));
3835         }
3836
3837         if (@headlist) {
3838                 git_print_header_div('heads');
3839                 git_heads_body(\@headlist, $head, 0, 15,
3840                                $#headlist <= 15 ? undef :
3841                                $cgi->a({-href => href(action=>"heads")}, "..."));
3842         }
3843
3844         if (@forklist) {
3845                 git_print_header_div('forks');
3846                 git_project_list_body(\@forklist, undef, 0, 15,
3847                                       $#forklist <= 15 ? undef :
3848                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3849                                       'noheader');
3850         }
3851
3852         git_footer_html();
3853 }
3854
3855 sub git_tag {
3856         my $head = git_get_head_hash($project);
3857         git_header_html();
3858         git_print_page_nav('','', $head,undef,$head);
3859         my %tag = parse_tag($hash);
3860
3861         if (! %tag) {
3862                 die_error(undef, "Unknown tag object");
3863         }
3864
3865         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3866         print "<div class=\"title_text\">\n" .
3867               "<table cellspacing=\"0\">\n" .
3868               "<tr>\n" .
3869               "<td>object</td>\n" .
3870               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3871                                $tag{'object'}) . "</td>\n" .
3872               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3873                                               $tag{'type'}) . "</td>\n" .
3874               "</tr>\n";
3875         if (defined($tag{'author'})) {
3876                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3877                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3878                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3879                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3880                         "</td></tr>\n";
3881         }
3882         print "</table>\n\n" .
3883               "</div>\n";
3884         print "<div class=\"page_body\">";
3885         my $comment = $tag{'comment'};
3886         foreach my $line (@$comment) {
3887                 chomp $line;
3888                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3889         }
3890         print "</div>\n";
3891         git_footer_html();
3892 }
3893
3894 sub git_blame2 {
3895         my $fd;
3896         my $ftype;
3897
3898         my ($have_blame) = gitweb_check_feature('blame');
3899         if (!$have_blame) {
3900                 die_error('403 Permission denied', "Permission denied");
3901         }
3902         die_error('404 Not Found', "File name not defined") if (!$file_name);
3903         $hash_base ||= git_get_head_hash($project);
3904         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3905         my %co = parse_commit($hash_base)
3906                 or die_error(undef, "Reading commit failed");
3907         if (!defined $hash) {
3908                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3909                         or die_error(undef, "Error looking up file");
3910         }
3911         $ftype = git_get_type($hash);
3912         if ($ftype !~ "blob") {
3913                 die_error('400 Bad Request', "Object is not a blob");
3914         }
3915         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3916               $file_name, $hash_base)
3917                 or die_error(undef, "Open git-blame failed");
3918         git_header_html();
3919         my $formats_nav =
3920                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3921                         "blob") .
3922                 " | " .
3923                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3924                         "history") .
3925                 " | " .
3926                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3927                         "HEAD");
3928         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3929         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3930         git_print_page_path($file_name, $ftype, $hash_base);
3931         my @rev_color = (qw(light2 dark2));
3932         my $num_colors = scalar(@rev_color);
3933         my $current_color = 0;
3934         my $last_rev;
3935         print <<HTML;
3936 <div class="page_body">
3937 <table class="blame">
3938 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3939 HTML
3940         my %metainfo = ();
3941         while (1) {
3942                 $_ = <$fd>;
3943                 last unless defined $_;
3944                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3945                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3946                 if (!exists $metainfo{$full_rev}) {
3947                         $metainfo{$full_rev} = {};
3948                 }
3949                 my $meta = $metainfo{$full_rev};
3950                 while (<$fd>) {
3951                         last if (s/^\t//);
3952                         if (/^(\S+) (.*)$/) {
3953                                 $meta->{$1} = $2;
3954                         }
3955                 }
3956                 my $data = $_;
3957                 chomp $data;
3958                 my $rev = substr($full_rev, 0, 8);
3959                 my $author = $meta->{'author'};
3960                 my %date = parse_date($meta->{'author-time'},
3961                                       $meta->{'author-tz'});
3962                 my $date = $date{'iso-tz'};
3963                 if ($group_size) {
3964                         $current_color = ++$current_color % $num_colors;
3965                 }
3966                 print "<tr class=\"$rev_color[$current_color]\">\n";
3967                 if ($group_size) {
3968                         print "<td class=\"sha1\"";
3969                         print " title=\"". esc_html($author) . ", $date\"";
3970                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3971                         print ">";
3972                         print $cgi->a({-href => href(action=>"commit",
3973                                                      hash=>$full_rev,
3974                                                      file_name=>$file_name)},
3975                                       esc_html($rev));
3976                         print "</td>\n";
3977                 }
3978                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3979                         or die_error(undef, "Open git-rev-parse failed");
3980                 my $parent_commit = <$dd>;
3981                 close $dd;
3982                 chomp($parent_commit);
3983                 my $blamed = href(action => 'blame',
3984                                   file_name => $meta->{'filename'},
3985                                   hash_base => $parent_commit);
3986                 print "<td class=\"linenr\">";
3987                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3988                                 -id => "l$lineno",
3989                                 -class => "linenr" },
3990                               esc_html($lineno));
3991                 print "</td>";
3992                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3993                 print "</tr>\n";
3994         }
3995         print "</table>\n";
3996         print "</div>";
3997         close $fd
3998                 or print "Reading blob failed\n";
3999         git_footer_html();
4000 }
4001
4002 sub git_blame {
4003         my $fd;
4004
4005         my ($have_blame) = gitweb_check_feature('blame');
4006         if (!$have_blame) {
4007                 die_error('403 Permission denied', "Permission denied");
4008         }
4009         die_error('404 Not Found', "File name not defined") if (!$file_name);
4010         $hash_base ||= git_get_head_hash($project);
4011         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4012         my %co = parse_commit($hash_base)
4013                 or die_error(undef, "Reading commit failed");
4014         if (!defined $hash) {
4015                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4016                         or die_error(undef, "Error lookup file");
4017         }
4018         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4019                 or die_error(undef, "Open git-annotate failed");
4020         git_header_html();
4021         my $formats_nav =
4022                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4023                         "blob") .
4024                 " | " .
4025                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4026                         "history") .
4027                 " | " .
4028                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4029                         "HEAD");
4030         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4031         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4032         git_print_page_path($file_name, 'blob', $hash_base);
4033         print "<div class=\"page_body\">\n";
4034         print <<HTML;
4035 <table class="blame">
4036   <tr>
4037     <th>Commit</th>
4038     <th>Age</th>
4039     <th>Author</th>
4040     <th>Line</th>
4041     <th>Data</th>
4042   </tr>
4043 HTML
4044         my @line_class = (qw(light dark));
4045         my $line_class_len = scalar (@line_class);
4046         my $line_class_num = $#line_class;
4047         while (my $line = <$fd>) {
4048                 my $long_rev;
4049                 my $short_rev;
4050                 my $author;
4051                 my $time;
4052                 my $lineno;
4053                 my $data;
4054                 my $age;
4055                 my $age_str;
4056                 my $age_class;
4057
4058                 chomp $line;
4059                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4060
4061                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4062                         $long_rev = $1;
4063                         $author   = $2;
4064                         $time     = $3;
4065                         $lineno   = $4;
4066                         $data     = $5;
4067                 } else {
4068                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4069                         next;
4070                 }
4071                 $short_rev  = substr ($long_rev, 0, 8);
4072                 $age        = time () - $time;
4073                 $age_str    = age_string ($age);
4074                 $age_str    =~ s/ /&nbsp;/g;
4075                 $age_class  = age_class($age);
4076                 $author     = esc_html ($author);
4077                 $author     =~ s/ /&nbsp;/g;
4078
4079                 $data = untabify($data);
4080                 $data = esc_html ($data);
4081
4082                 print <<HTML;
4083   <tr class="$line_class[$line_class_num]">
4084     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4085     <td class="$age_class">$age_str</td>
4086     <td>$author</td>
4087     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4088     <td class="pre">$data</td>
4089   </tr>
4090 HTML
4091         } # while (my $line = <$fd>)
4092         print "</table>\n\n";
4093         close $fd
4094                 or print "Reading blob failed.\n";
4095         print "</div>";
4096         git_footer_html();
4097 }
4098
4099 sub git_tags {
4100         my $head = git_get_head_hash($project);
4101         git_header_html();
4102         git_print_page_nav('','', $head,undef,$head);
4103         git_print_header_div('summary', $project);
4104
4105         my @tagslist = git_get_tags_list();
4106         if (@tagslist) {
4107                 git_tags_body(\@tagslist);
4108         }
4109         git_footer_html();
4110 }
4111
4112 sub git_heads {
4113         my $head = git_get_head_hash($project);
4114         git_header_html();
4115         git_print_page_nav('','', $head,undef,$head);
4116         git_print_header_div('summary', $project);
4117
4118         my @headslist = git_get_heads_list();
4119         if (@headslist) {
4120                 git_heads_body(\@headslist, $head);
4121         }
4122         git_footer_html();
4123 }
4124
4125 sub git_blob_plain {
4126         my $expires;
4127
4128         if (!defined $hash) {
4129                 if (defined $file_name) {
4130                         my $base = $hash_base || git_get_head_hash($project);
4131                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4132                                 or die_error(undef, "Error lookup file");
4133                 } else {
4134                         die_error(undef, "No file name defined");
4135                 }
4136         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4137                 # blobs defined by non-textual hash id's can be cached
4138                 $expires = "+1d";
4139         }
4140
4141         my $type = shift;
4142         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4143                 or die_error(undef, "Couldn't cat $file_name, $hash");
4144
4145         $type ||= blob_mimetype($fd, $file_name);
4146
4147         # save as filename, even when no $file_name is given
4148         my $save_as = "$hash";
4149         if (defined $file_name) {
4150                 $save_as = $file_name;
4151         } elsif ($type =~ m/^text\//) {
4152                 $save_as .= '.txt';
4153         }
4154
4155         print $cgi->header(
4156                 -type => "$type",
4157                 -expires=>$expires,
4158                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4159         undef $/;
4160         binmode STDOUT, ':raw';
4161         print <$fd>;
4162         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4163         $/ = "\n";
4164         close $fd;
4165 }
4166
4167 sub git_blob {
4168         my $expires;
4169
4170         if (!defined $hash) {
4171                 if (defined $file_name) {
4172                         my $base = $hash_base || git_get_head_hash($project);
4173                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4174                                 or die_error(undef, "Error lookup file");
4175                 } else {
4176                         die_error(undef, "No file name defined");
4177                 }
4178         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4179                 # blobs defined by non-textual hash id's can be cached
4180                 $expires = "+1d";
4181         }
4182
4183         my ($have_blame) = gitweb_check_feature('blame');
4184         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4185                 or die_error(undef, "Couldn't cat $file_name, $hash");
4186         my $mimetype = blob_mimetype($fd, $file_name);
4187         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4188                 close $fd;
4189                 return git_blob_plain($mimetype);
4190         }
4191         # we can have blame only for text/* mimetype
4192         $have_blame &&= ($mimetype =~ m!^text/!);
4193
4194         git_header_html(undef, $expires);
4195         my $formats_nav = '';
4196         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4197                 if (defined $file_name) {
4198                         if ($have_blame) {
4199                                 $formats_nav .=
4200                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4201                                                                hash=>$hash, file_name=>$file_name)},
4202                                                 "blame") .
4203                                         " | ";
4204                         }
4205                         $formats_nav .=
4206                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4207                                                        hash=>$hash, file_name=>$file_name)},
4208                                         "history") .
4209                                 " | " .
4210                                 $cgi->a({-href => href(action=>"blob_plain",
4211                                                        hash=>$hash, file_name=>$file_name)},
4212                                         "raw") .
4213                                 " | " .
4214                                 $cgi->a({-href => href(action=>"blob",
4215                                                        hash_base=>"HEAD", file_name=>$file_name)},
4216                                         "HEAD");
4217                 } else {
4218                         $formats_nav .=
4219                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4220                 }
4221                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4222                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4223         } else {
4224                 print "<div class=\"page_nav\">\n" .
4225                       "<br/><br/></div>\n" .
4226                       "<div class=\"title\">$hash</div>\n";
4227         }
4228         git_print_page_path($file_name, "blob", $hash_base);
4229         print "<div class=\"page_body\">\n";
4230         if ($mimetype =~ m!^text/!) {
4231                 my $nr;
4232                 while (my $line = <$fd>) {
4233                         chomp $line;
4234                         $nr++;
4235                         $line = untabify($line);
4236                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4237                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4238                 }
4239         } elsif ($mimetype =~ m!^image/!) {
4240                 print qq!<img type="$mimetype"!;
4241                 if ($file_name) {
4242                         print qq! alt="$file_name" title="$file_name"!;
4243                 }
4244                 print qq! src="! .
4245                       href(action=>"blob_plain", hash=>$hash,
4246                            hash_base=>$hash_base, file_name=>$file_name) .
4247                       qq!" />\n!;
4248         }
4249         close $fd
4250                 or print "Reading blob failed.\n";
4251         print "</div>";
4252         git_footer_html();
4253 }
4254
4255 sub git_tree {
4256         if (!defined $hash_base) {
4257                 $hash_base = "HEAD";
4258         }
4259         if (!defined $hash) {
4260                 if (defined $file_name) {
4261                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4262                 } else {
4263                         $hash = $hash_base;
4264                 }
4265         }
4266         $/ = "\0";
4267         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4268                 or die_error(undef, "Open git-ls-tree failed");
4269         my @entries = map { chomp; $_ } <$fd>;
4270         close $fd or die_error(undef, "Reading tree failed");
4271         $/ = "\n";
4272
4273         my $refs = git_get_references();
4274         my $ref = format_ref_marker($refs, $hash_base);
4275         git_header_html();
4276         my $basedir = '';
4277         my ($have_blame) = gitweb_check_feature('blame');
4278         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4279                 my @views_nav = ();
4280                 if (defined $file_name) {
4281                         push @views_nav,
4282                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4283                                                        hash=>$hash, file_name=>$file_name)},
4284                                         "history"),
4285                                 $cgi->a({-href => href(action=>"tree",
4286                                                        hash_base=>"HEAD", file_name=>$file_name)},
4287                                         "HEAD"),
4288                 }
4289                 my $snapshot_links = format_snapshot_links($hash);
4290                 if (defined $snapshot_links) {
4291                         # FIXME: Should be available when we have no hash base as well.
4292                         push @views_nav, $snapshot_links;
4293                 }
4294                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4295                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4296         } else {
4297                 undef $hash_base;
4298                 print "<div class=\"page_nav\">\n";
4299                 print "<br/><br/></div>\n";
4300                 print "<div class=\"title\">$hash</div>\n";
4301         }
4302         if (defined $file_name) {
4303                 $basedir = $file_name;
4304                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4305                         $basedir .= '/';
4306                 }
4307         }
4308         git_print_page_path($file_name, 'tree', $hash_base);
4309         print "<div class=\"page_body\">\n";
4310         print "<table cellspacing=\"0\">\n";
4311         my $alternate = 1;
4312         # '..' (top directory) link if possible
4313         if (defined $hash_base &&
4314             defined $file_name && $file_name =~ m![^/]+$!) {
4315                 if ($alternate) {
4316                         print "<tr class=\"dark\">\n";
4317                 } else {
4318                         print "<tr class=\"light\">\n";
4319                 }
4320                 $alternate ^= 1;
4321
4322                 my $up = $file_name;
4323                 $up =~ s!/?[^/]+$!!;
4324                 undef $up unless $up;
4325                 # based on git_print_tree_entry
4326                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4327                 print '<td class="list">';
4328                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4329                                              file_name=>$up)},
4330                               "..");
4331                 print "</td>\n";
4332                 print "<td class=\"link\"></td>\n";
4333
4334                 print "</tr>\n";
4335         }
4336         foreach my $line (@entries) {
4337                 my %t = parse_ls_tree_line($line, -z => 1);
4338
4339                 if ($alternate) {
4340                         print "<tr class=\"dark\">\n";
4341                 } else {
4342                         print "<tr class=\"light\">\n";
4343                 }
4344                 $alternate ^= 1;
4345
4346                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4347
4348                 print "</tr>\n";
4349         }
4350         print "</table>\n" .
4351               "</div>";
4352         git_footer_html();
4353 }
4354
4355 sub git_snapshot {
4356         my @supported_fmts = gitweb_check_feature('snapshot');
4357         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4358
4359         my $format = $cgi->param('sf');
4360         if (!@supported_fmts) {
4361                 die_error('403 Permission denied', "Permission denied");
4362         }
4363         # default to first supported snapshot format
4364         $format ||= $supported_fmts[0];
4365         if ($format !~ m/^[a-z0-9]+$/) {
4366                 die_error(undef, "Invalid snapshot format parameter");
4367         } elsif (!exists($known_snapshot_formats{$format})) {
4368                 die_error(undef, "Unknown snapshot format");
4369         } elsif (!grep($_ eq $format, @supported_fmts)) {
4370                 die_error(undef, "Unsupported snapshot format");
4371         }
4372
4373         if (!defined $hash) {
4374                 $hash = git_get_head_hash($project);
4375         }
4376
4377         my $git_command = git_cmd_str();
4378         my $name = $project;
4379         $name =~ s,([^/])/*\.git$,$1,;
4380         $name = basename($name);
4381         my $filename = to_utf8($name);
4382         $name =~ s/\047/\047\\\047\047/g;
4383         my $cmd;
4384         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4385         $cmd = "$git_command archive " .
4386                 "--format=$known_snapshot_formats{$format}{'format'} " .
4387                 "--prefix=\'$name\'/ $hash";
4388         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4389                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4390         }
4391
4392         print $cgi->header(
4393                 -type => $known_snapshot_formats{$format}{'type'},
4394                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4395                 -status => '200 OK');
4396
4397         open my $fd, "-|", $cmd
4398                 or die_error(undef, "Execute git-archive failed");
4399         binmode STDOUT, ':raw';
4400         print <$fd>;
4401         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4402         close $fd;
4403 }
4404
4405 sub git_log {
4406         my $head = git_get_head_hash($project);
4407         if (!defined $hash) {
4408                 $hash = $head;
4409         }
4410         if (!defined $page) {
4411                 $page = 0;
4412         }
4413         my $refs = git_get_references();
4414
4415         my @commitlist = parse_commits($hash, 101, (100 * $page));
4416
4417         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4418
4419         git_header_html();
4420         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4421
4422         if (!@commitlist) {
4423                 my %co = parse_commit($hash);
4424
4425                 git_print_header_div('summary', $project);
4426                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4427         }
4428         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4429         for (my $i = 0; $i <= $to; $i++) {
4430                 my %co = %{$commitlist[$i]};
4431                 next if !%co;
4432                 my $commit = $co{'id'};
4433                 my $ref = format_ref_marker($refs, $commit);
4434                 my %ad = parse_date($co{'author_epoch'});
4435                 git_print_header_div('commit',
4436                                "<span class=\"age\">$co{'age_string'}</span>" .
4437                                esc_html($co{'title'}) . $ref,
4438                                $commit);
4439                 print "<div class=\"title_text\">\n" .
4440                       "<div class=\"log_link\">\n" .
4441                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4442                       " | " .
4443                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4444                       " | " .
4445                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4446                       "<br/>\n" .
4447                       "</div>\n" .
4448                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4449                       "</div>\n";
4450
4451                 print "<div class=\"log_body\">\n";
4452                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4453                 print "</div>\n";
4454         }
4455         if ($#commitlist >= 100) {
4456                 print "<div class=\"page_nav\">\n";
4457                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4458                                -accesskey => "n", -title => "Alt-n"}, "next");
4459                 print "</div>\n";
4460         }
4461         git_footer_html();
4462 }
4463
4464 sub git_commit {
4465         $hash ||= $hash_base || "HEAD";
4466         my %co = parse_commit($hash);
4467         if (!%co) {
4468                 die_error(undef, "Unknown commit object");
4469         }
4470         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4471         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4472
4473         my $parent  = $co{'parent'};
4474         my $parents = $co{'parents'}; # listref
4475
4476         # we need to prepare $formats_nav before any parameter munging
4477         my $formats_nav;
4478         if (!defined $parent) {
4479                 # --root commitdiff
4480                 $formats_nav .= '(initial)';
4481         } elsif (@$parents == 1) {
4482                 # single parent commit
4483                 $formats_nav .=
4484                         '(parent: ' .
4485                         $cgi->a({-href => href(action=>"commit",
4486                                                hash=>$parent)},
4487                                 esc_html(substr($parent, 0, 7))) .
4488                         ')';
4489         } else {
4490                 # merge commit
4491                 $formats_nav .=
4492                         '(merge: ' .
4493                         join(' ', map {
4494                                 $cgi->a({-href => href(action=>"commit",
4495                                                        hash=>$_)},
4496                                         esc_html(substr($_, 0, 7)));
4497                         } @$parents ) .
4498                         ')';
4499         }
4500
4501         if (!defined $parent) {
4502                 $parent = "--root";
4503         }
4504         my @difftree;
4505         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4506                 @diff_opts,
4507                 (@$parents <= 1 ? $parent : '-c'),
4508                 $hash, "--"
4509                 or die_error(undef, "Open git-diff-tree failed");
4510         @difftree = map { chomp; $_ } <$fd>;
4511         close $fd or die_error(undef, "Reading git-diff-tree failed");
4512
4513         # non-textual hash id's can be cached
4514         my $expires;
4515         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4516                 $expires = "+1d";
4517         }
4518         my $refs = git_get_references();
4519         my $ref = format_ref_marker($refs, $co{'id'});
4520
4521         git_header_html(undef, $expires);
4522         git_print_page_nav('commit', '',
4523                            $hash, $co{'tree'}, $hash,
4524                            $formats_nav);
4525
4526         if (defined $co{'parent'}) {
4527                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4528         } else {
4529                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4530         }
4531         print "<div class=\"title_text\">\n" .
4532               "<table cellspacing=\"0\">\n";
4533         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4534               "<tr>" .
4535               "<td></td><td> $ad{'rfc2822'}";
4536         if ($ad{'hour_local'} < 6) {
4537                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4538                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4539         } else {
4540                 printf(" (%02d:%02d %s)",
4541                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4542         }
4543         print "</td>" .
4544               "</tr>\n";
4545         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4546         print "<tr><td></td><td> $cd{'rfc2822'}" .
4547               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4548               "</td></tr>\n";
4549         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4550         print "<tr>" .
4551               "<td>tree</td>" .
4552               "<td class=\"sha1\">" .
4553               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4554                        class => "list"}, $co{'tree'}) .
4555               "</td>" .
4556               "<td class=\"link\">" .
4557               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4558                       "tree");
4559         my $snapshot_links = format_snapshot_links($hash);
4560         if (defined $snapshot_links) {
4561                 print " | " . $snapshot_links;
4562         }
4563         print "</td>" .
4564               "</tr>\n";
4565
4566         foreach my $par (@$parents) {
4567                 print "<tr>" .
4568                       "<td>parent</td>" .
4569                       "<td class=\"sha1\">" .
4570                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4571                                class => "list"}, $par) .
4572                       "</td>" .
4573                       "<td class=\"link\">" .
4574                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4575                       " | " .
4576                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4577                       "</td>" .
4578                       "</tr>\n";
4579         }
4580         print "</table>".
4581               "</div>\n";
4582
4583         print "<div class=\"page_body\">\n";
4584         git_print_log($co{'comment'});
4585         print "</div>\n";
4586
4587         git_difftree_body(\@difftree, $hash, @$parents);
4588
4589         git_footer_html();
4590 }
4591
4592 sub git_object {
4593         # object is defined by:
4594         # - hash or hash_base alone
4595         # - hash_base and file_name
4596         my $type;
4597
4598         # - hash or hash_base alone
4599         if ($hash || ($hash_base && !defined $file_name)) {
4600                 my $object_id = $hash || $hash_base;
4601
4602                 my $git_command = git_cmd_str();
4603                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4604                         or die_error('404 Not Found', "Object does not exist");
4605                 $type = <$fd>;
4606                 chomp $type;
4607                 close $fd
4608                         or die_error('404 Not Found', "Object does not exist");
4609
4610         # - hash_base and file_name
4611         } elsif ($hash_base && defined $file_name) {
4612                 $file_name =~ s,/+$,,;
4613
4614                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4615                         or die_error('404 Not Found', "Base object does not exist");
4616
4617                 # here errors should not hapen
4618                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4619                         or die_error(undef, "Open git-ls-tree failed");
4620                 my $line = <$fd>;
4621                 close $fd;
4622
4623                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4624                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4625                         die_error('404 Not Found', "File or directory for given base does not exist");
4626                 }
4627                 $type = $2;
4628                 $hash = $3;
4629         } else {
4630                 die_error('404 Not Found', "Not enough information to find object");
4631         }
4632
4633         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4634                                           hash=>$hash, hash_base=>$hash_base,
4635                                           file_name=>$file_name),
4636                              -status => '302 Found');
4637 }
4638
4639 sub git_blobdiff {
4640         my $format = shift || 'html';
4641
4642         my $fd;
4643         my @difftree;
4644         my %diffinfo;
4645         my $expires;
4646
4647         # preparing $fd and %diffinfo for git_patchset_body
4648         # new style URI
4649         if (defined $hash_base && defined $hash_parent_base) {
4650                 if (defined $file_name) {
4651                         # read raw output
4652                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4653                                 $hash_parent_base, $hash_base,
4654                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4655                                 or die_error(undef, "Open git-diff-tree failed");
4656                         @difftree = map { chomp; $_ } <$fd>;
4657                         close $fd
4658                                 or die_error(undef, "Reading git-diff-tree failed");
4659                         @difftree
4660                                 or die_error('404 Not Found', "Blob diff not found");
4661
4662                 } elsif (defined $hash &&
4663                          $hash =~ /[0-9a-fA-F]{40}/) {
4664                         # try to find filename from $hash
4665
4666                         # read filtered raw output
4667                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4668                                 $hash_parent_base, $hash_base, "--"
4669                                 or die_error(undef, "Open git-diff-tree failed");
4670                         @difftree =
4671                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4672                                 # $hash == to_id
4673                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4674                                 map { chomp; $_ } <$fd>;
4675                         close $fd
4676                                 or die_error(undef, "Reading git-diff-tree failed");
4677                         @difftree
4678                                 or die_error('404 Not Found', "Blob diff not found");
4679
4680                 } else {
4681                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4682                 }
4683
4684                 if (@difftree > 1) {
4685                         die_error('404 Not Found', "Ambiguous blob diff specification");
4686                 }
4687
4688                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4689                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4690                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4691
4692                 $hash_parent ||= $diffinfo{'from_id'};
4693                 $hash        ||= $diffinfo{'to_id'};
4694
4695                 # non-textual hash id's can be cached
4696                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4697                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4698                         $expires = '+1d';
4699                 }
4700
4701                 # open patch output
4702                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4703                         '-p', ($format eq 'html' ? "--full-index" : ()),
4704                         $hash_parent_base, $hash_base,
4705                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4706                         or die_error(undef, "Open git-diff-tree failed");
4707         }
4708
4709         # old/legacy style URI
4710         if (!%diffinfo && # if new style URI failed
4711             defined $hash && defined $hash_parent) {
4712                 # fake git-diff-tree raw output
4713                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4714                 $diffinfo{'from_id'} = $hash_parent;
4715                 $diffinfo{'to_id'}   = $hash;
4716                 if (defined $file_name) {
4717                         if (defined $file_parent) {
4718                                 $diffinfo{'status'} = '2';
4719                                 $diffinfo{'from_file'} = $file_parent;
4720                                 $diffinfo{'to_file'}   = $file_name;
4721                         } else { # assume not renamed
4722                                 $diffinfo{'status'} = '1';
4723                                 $diffinfo{'from_file'} = $file_name;
4724                                 $diffinfo{'to_file'}   = $file_name;
4725                         }
4726                 } else { # no filename given
4727                         $diffinfo{'status'} = '2';
4728                         $diffinfo{'from_file'} = $hash_parent;
4729                         $diffinfo{'to_file'}   = $hash;
4730                 }
4731
4732                 # non-textual hash id's can be cached
4733                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4734                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4735                         $expires = '+1d';
4736                 }
4737
4738                 # open patch output
4739                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4740                         '-p', ($format eq 'html' ? "--full-index" : ()),
4741                         $hash_parent, $hash, "--"
4742                         or die_error(undef, "Open git-diff failed");
4743         } else  {
4744                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4745                         unless %diffinfo;
4746         }
4747
4748         # header
4749         if ($format eq 'html') {
4750                 my $formats_nav =
4751                         $cgi->a({-href => href(action=>"blobdiff_plain",
4752                                                hash=>$hash, hash_parent=>$hash_parent,
4753                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4754                                                file_name=>$file_name, file_parent=>$file_parent)},
4755                                 "raw");
4756                 git_header_html(undef, $expires);
4757                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4758                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4759                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4760                 } else {
4761                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4762                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4763                 }
4764                 if (defined $file_name) {
4765                         git_print_page_path($file_name, "blob", $hash_base);
4766                 } else {
4767                         print "<div class=\"page_path\"></div>\n";
4768                 }
4769
4770         } elsif ($format eq 'plain') {
4771                 print $cgi->header(
4772                         -type => 'text/plain',
4773                         -charset => 'utf-8',
4774                         -expires => $expires,
4775                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4776
4777                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4778
4779         } else {
4780                 die_error(undef, "Unknown blobdiff format");
4781         }
4782
4783         # patch
4784         if ($format eq 'html') {
4785                 print "<div class=\"page_body\">\n";
4786
4787                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4788                 close $fd;
4789
4790                 print "</div>\n"; # class="page_body"
4791                 git_footer_html();
4792
4793         } else {
4794                 while (my $line = <$fd>) {
4795                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4796                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4797
4798                         print $line;
4799
4800                         last if $line =~ m!^\+\+\+!;
4801                 }
4802                 local $/ = undef;
4803                 print <$fd>;
4804                 close $fd;
4805         }
4806 }
4807
4808 sub git_blobdiff_plain {
4809         git_blobdiff('plain');
4810 }
4811
4812 sub git_commitdiff {
4813         my $format = shift || 'html';
4814         $hash ||= $hash_base || "HEAD";
4815         my %co = parse_commit($hash);
4816         if (!%co) {
4817                 die_error(undef, "Unknown commit object");
4818         }
4819
4820         # choose format for commitdiff for merge
4821         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4822                 $hash_parent = '--cc';
4823         }
4824         # we need to prepare $formats_nav before almost any parameter munging
4825         my $formats_nav;
4826         if ($format eq 'html') {
4827                 $formats_nav =
4828                         $cgi->a({-href => href(action=>"commitdiff_plain",
4829                                                hash=>$hash, hash_parent=>$hash_parent)},
4830                                 "raw");
4831
4832                 if (defined $hash_parent &&
4833                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4834                         # commitdiff with two commits given
4835                         my $hash_parent_short = $hash_parent;
4836                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4837                                 $hash_parent_short = substr($hash_parent, 0, 7);
4838                         }
4839                         $formats_nav .=
4840                                 ' (from';
4841                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4842                                 if ($co{'parents'}[$i] eq $hash_parent) {
4843                                         $formats_nav .= ' parent ' . ($i+1);
4844                                         last;
4845                                 }
4846                         }
4847                         $formats_nav .= ': ' .
4848                                 $cgi->a({-href => href(action=>"commitdiff",
4849                                                        hash=>$hash_parent)},
4850                                         esc_html($hash_parent_short)) .
4851                                 ')';
4852                 } elsif (!$co{'parent'}) {
4853                         # --root commitdiff
4854                         $formats_nav .= ' (initial)';
4855                 } elsif (scalar @{$co{'parents'}} == 1) {
4856                         # single parent commit
4857                         $formats_nav .=
4858                                 ' (parent: ' .
4859                                 $cgi->a({-href => href(action=>"commitdiff",
4860                                                        hash=>$co{'parent'})},
4861                                         esc_html(substr($co{'parent'}, 0, 7))) .
4862                                 ')';
4863                 } else {
4864                         # merge commit
4865                         if ($hash_parent eq '--cc') {
4866                                 $formats_nav .= ' | ' .
4867                                         $cgi->a({-href => href(action=>"commitdiff",
4868                                                                hash=>$hash, hash_parent=>'-c')},
4869                                                 'combined');
4870                         } else { # $hash_parent eq '-c'
4871                                 $formats_nav .= ' | ' .
4872                                         $cgi->a({-href => href(action=>"commitdiff",
4873                                                                hash=>$hash, hash_parent=>'--cc')},
4874                                                 'compact');
4875                         }
4876                         $formats_nav .=
4877                                 ' (merge: ' .
4878                                 join(' ', map {
4879                                         $cgi->a({-href => href(action=>"commitdiff",
4880                                                                hash=>$_)},
4881                                                 esc_html(substr($_, 0, 7)));
4882                                 } @{$co{'parents'}} ) .
4883                                 ')';
4884                 }
4885         }
4886
4887         my $hash_parent_param = $hash_parent;
4888         if (!defined $hash_parent_param) {
4889                 # --cc for multiple parents, --root for parentless
4890                 $hash_parent_param =
4891                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4892         }
4893
4894         # read commitdiff
4895         my $fd;
4896         my @difftree;
4897         if ($format eq 'html') {
4898                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4899                         "--no-commit-id", "--patch-with-raw", "--full-index",
4900                         $hash_parent_param, $hash, "--"
4901                         or die_error(undef, "Open git-diff-tree failed");
4902
4903                 while (my $line = <$fd>) {
4904                         chomp $line;
4905                         # empty line ends raw part of diff-tree output
4906                         last unless $line;
4907                         push @difftree, scalar parse_difftree_raw_line($line);
4908                 }
4909
4910         } elsif ($format eq 'plain') {
4911                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4912                         '-p', $hash_parent_param, $hash, "--"
4913                         or die_error(undef, "Open git-diff-tree failed");
4914
4915         } else {
4916                 die_error(undef, "Unknown commitdiff format");
4917         }
4918
4919         # non-textual hash id's can be cached
4920         my $expires;
4921         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4922                 $expires = "+1d";
4923         }
4924
4925         # write commit message
4926         if ($format eq 'html') {
4927                 my $refs = git_get_references();
4928                 my $ref = format_ref_marker($refs, $co{'id'});
4929
4930                 git_header_html(undef, $expires);
4931                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4932                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4933                 git_print_authorship(\%co);
4934                 print "<div class=\"page_body\">\n";
4935                 if (@{$co{'comment'}} > 1) {
4936                         print "<div class=\"log\">\n";
4937                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4938                         print "</div>\n"; # class="log"
4939                 }
4940
4941         } elsif ($format eq 'plain') {
4942                 my $refs = git_get_references("tags");
4943                 my $tagname = git_get_rev_name_tags($hash);
4944                 my $filename = basename($project) . "-$hash.patch";
4945
4946                 print $cgi->header(
4947                         -type => 'text/plain',
4948                         -charset => 'utf-8',
4949                         -expires => $expires,
4950                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4951                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4952                 print <<TEXT;
4953 From: $co{'author'}
4954 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4955 Subject: $co{'title'}
4956 TEXT
4957                 print "X-Git-Tag: $tagname\n" if $tagname;
4958                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4959
4960                 foreach my $line (@{$co{'comment'}}) {
4961                         print "$line\n";
4962                 }
4963                 print "---\n\n";
4964         }
4965
4966         # write patch
4967         if ($format eq 'html') {
4968                 my $use_parents = !defined $hash_parent ||
4969                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4970                 git_difftree_body(\@difftree, $hash,
4971                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4972                 print "<br/>\n";
4973
4974                 git_patchset_body($fd, \@difftree, $hash,
4975                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4976                 close $fd;
4977                 print "</div>\n"; # class="page_body"
4978                 git_footer_html();
4979
4980         } elsif ($format eq 'plain') {
4981                 local $/ = undef;
4982                 print <$fd>;
4983                 close $fd
4984                         or print "Reading git-diff-tree failed\n";
4985         }
4986 }
4987
4988 sub git_commitdiff_plain {
4989         git_commitdiff('plain');
4990 }
4991
4992 sub git_history {
4993         if (!defined $hash_base) {
4994                 $hash_base = git_get_head_hash($project);
4995         }
4996         if (!defined $page) {
4997                 $page = 0;
4998         }
4999         my $ftype;
5000         my %co = parse_commit($hash_base);
5001         if (!%co) {
5002                 die_error(undef, "Unknown commit object");
5003         }
5004
5005         my $refs = git_get_references();
5006         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5007
5008         if (!defined $hash && defined $file_name) {
5009                 $hash = git_get_hash_by_path($hash_base, $file_name);
5010         }
5011         if (defined $hash) {
5012                 $ftype = git_get_type($hash);
5013         }
5014
5015         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5016
5017         my $paging_nav = '';
5018         if ($page > 0) {
5019                 $paging_nav .=
5020                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5021                                                file_name=>$file_name)},
5022                                 "first");
5023                 $paging_nav .= " &sdot; " .
5024                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5025                                                file_name=>$file_name, page=>$page-1),
5026                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5027         } else {
5028                 $paging_nav .= "first";
5029                 $paging_nav .= " &sdot; prev";
5030         }
5031         if ($#commitlist >= 100) {
5032                 $paging_nav .= " &sdot; " .
5033                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5034                                                file_name=>$file_name, page=>$page+1),
5035                                  -accesskey => "n", -title => "Alt-n"}, "next");
5036         } else {
5037                 $paging_nav .= " &sdot; next";
5038         }
5039         my $next_link = '';
5040         if ($#commitlist >= 100) {
5041                 $next_link =
5042                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5043                                                file_name=>$file_name, page=>$page+1),
5044                                  -accesskey => "n", -title => "Alt-n"}, "next");
5045         }
5046
5047         git_header_html();
5048         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5049         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5050         git_print_page_path($file_name, $ftype, $hash_base);
5051
5052         git_history_body(\@commitlist, 0, 99,
5053                          $refs, $hash_base, $ftype, $next_link);
5054
5055         git_footer_html();
5056 }
5057
5058 sub git_search {
5059         my ($have_search) = gitweb_check_feature('search');
5060         if (!$have_search) {
5061                 die_error('403 Permission denied', "Permission denied");
5062         }
5063         if (!defined $searchtext) {
5064                 die_error(undef, "Text field empty");
5065         }
5066         if (!defined $hash) {
5067                 $hash = git_get_head_hash($project);
5068         }
5069         my %co = parse_commit($hash);
5070         if (!%co) {
5071                 die_error(undef, "Unknown commit object");
5072         }
5073         if (!defined $page) {
5074                 $page = 0;
5075         }
5076
5077         $searchtype ||= 'commit';
5078         if ($searchtype eq 'pickaxe') {
5079                 # pickaxe may take all resources of your box and run for several minutes
5080                 # with every query - so decide by yourself how public you make this feature
5081                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5082                 if (!$have_pickaxe) {
5083                         die_error('403 Permission denied', "Permission denied");
5084                 }
5085         }
5086         if ($searchtype eq 'grep') {
5087                 my ($have_grep) = gitweb_check_feature('grep');
5088                 if (!$have_grep) {
5089                         die_error('403 Permission denied', "Permission denied");
5090                 }
5091         }
5092
5093         git_header_html();
5094
5095         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5096                 my $greptype;
5097                 if ($searchtype eq 'commit') {
5098                         $greptype = "--grep=";
5099                 } elsif ($searchtype eq 'author') {
5100                         $greptype = "--author=";
5101                 } elsif ($searchtype eq 'committer') {
5102                         $greptype = "--committer=";
5103                 }
5104                 $greptype .= $search_regexp;
5105                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5106
5107                 my $paging_nav = '';
5108                 if ($page > 0) {
5109                         $paging_nav .=
5110                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5111                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5112                                         "first");
5113                         $paging_nav .= " &sdot; " .
5114                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5115                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5116                                                        page=>$page-1),
5117                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5118                 } else {
5119                         $paging_nav .= "first";
5120                         $paging_nav .= " &sdot; prev";
5121                 }
5122                 if ($#commitlist >= 100) {
5123                         $paging_nav .= " &sdot; " .
5124                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5125                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5126                                                        page=>$page+1),
5127                                          -accesskey => "n", -title => "Alt-n"}, "next");
5128                 } else {
5129                         $paging_nav .= " &sdot; next";
5130                 }
5131                 my $next_link = '';
5132                 if ($#commitlist >= 100) {
5133                         $next_link =
5134                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5135                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5136                                                        page=>$page+1),
5137                                          -accesskey => "n", -title => "Alt-n"}, "next");
5138                 }
5139
5140                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5141                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5142                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5143         }
5144
5145         if ($searchtype eq 'pickaxe') {
5146                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5147                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5148
5149                 print "<table cellspacing=\"0\">\n";
5150                 my $alternate = 1;
5151                 $/ = "\n";
5152                 my $git_command = git_cmd_str();
5153                 my $searchqtext = $searchtext;
5154                 $searchqtext =~ s/'/'\\''/;
5155                 open my $fd, "-|", "$git_command rev-list $hash | " .
5156                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5157                 undef %co;
5158                 my @files;
5159                 while (my $line = <$fd>) {
5160                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5161                                 my %set;
5162                                 $set{'file'} = $6;
5163                                 $set{'from_id'} = $3;
5164                                 $set{'to_id'} = $4;
5165                                 $set{'id'} = $set{'to_id'};
5166                                 if ($set{'id'} =~ m/0{40}/) {
5167                                         $set{'id'} = $set{'from_id'};
5168                                 }
5169                                 if ($set{'id'} =~ m/0{40}/) {
5170                                         next;
5171                                 }
5172                                 push @files, \%set;
5173                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5174                                 if (%co) {
5175                                         if ($alternate) {
5176                                                 print "<tr class=\"dark\">\n";
5177                                         } else {
5178                                                 print "<tr class=\"light\">\n";
5179                                         }
5180                                         $alternate ^= 1;
5181                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5182                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5183                                               "<td><i>" . $author . "</i></td>\n" .
5184                                               "<td>" .
5185                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5186                                                       -class => "list subject"},
5187                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5188                                         while (my $setref = shift @files) {
5189                                                 my %set = %$setref;
5190                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5191                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5192                                                               -class => "list"},
5193                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5194                                                       "<br/>\n";
5195                                         }
5196                                         print "</td>\n" .
5197                                               "<td class=\"link\">" .
5198                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5199                                               " | " .
5200                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5201                                         print "</td>\n" .
5202                                               "</tr>\n";
5203                                 }
5204                                 %co = parse_commit($1);
5205                         }
5206                 }
5207                 close $fd;
5208
5209                 print "</table>\n";
5210         }
5211
5212         if ($searchtype eq 'grep') {
5213                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5214                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5215
5216                 print "<table cellspacing=\"0\">\n";
5217                 my $alternate = 1;
5218                 my $matches = 0;
5219                 $/ = "\n";
5220                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5221                 my $lastfile = '';
5222                 while (my $line = <$fd>) {
5223                         chomp $line;
5224                         my ($file, $lno, $ltext, $binary);
5225                         last if ($matches++ > 1000);
5226                         if ($line =~ /^Binary file (.+) matches$/) {
5227                                 $file = $1;
5228                                 $binary = 1;
5229                         } else {
5230                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5231                         }
5232                         if ($file ne $lastfile) {
5233                                 $lastfile and print "</td></tr>\n";
5234                                 if ($alternate++) {
5235                                         print "<tr class=\"dark\">\n";
5236                                 } else {
5237                                         print "<tr class=\"light\">\n";
5238                                 }
5239                                 print "<td class=\"list\">".
5240                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5241                                                                file_name=>"$file"),
5242                                                 -class => "list"}, esc_path($file));
5243                                 print "</td><td>\n";
5244                                 $lastfile = $file;
5245                         }
5246                         if ($binary) {
5247                                 print "<div class=\"binary\">Binary file</div>\n";
5248                         } else {
5249                                 $ltext = untabify($ltext);
5250                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5251                                         $ltext = esc_html($1, -nbsp=>1);
5252                                         $ltext .= '<span class="match">';
5253                                         $ltext .= esc_html($2, -nbsp=>1);
5254                                         $ltext .= '</span>';
5255                                         $ltext .= esc_html($3, -nbsp=>1);
5256                                 } else {
5257                                         $ltext = esc_html($ltext, -nbsp=>1);
5258                                 }
5259                                 print "<div class=\"pre\">" .
5260                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5261                                                                file_name=>"$file").'#l'.$lno,
5262                                                 -class => "linenr"}, sprintf('%4i', $lno))
5263                                         . ' ' .  $ltext . "</div>\n";
5264                         }
5265                 }
5266                 if ($lastfile) {
5267                         print "</td></tr>\n";
5268                         if ($matches > 1000) {
5269                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5270                         }
5271                 } else {
5272                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5273                 }
5274                 close $fd;
5275
5276                 print "</table>\n";
5277         }
5278         git_footer_html();
5279 }
5280
5281 sub git_search_help {
5282         git_header_html();
5283         git_print_page_nav('','', $hash,$hash,$hash);
5284         print <<EOT;
5285 <dl>
5286 <dt><b>commit</b></dt>
5287 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5288 EOT
5289         my ($have_grep) = gitweb_check_feature('grep');
5290         if ($have_grep) {
5291                 print <<EOT;
5292 <dt><b>grep</b></dt>
5293 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5294     a different one) are searched for the given
5295 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5296 (POSIX extended) and the matches are listed. On large
5297 trees, this search can take a while and put some strain on the server, so please use it with
5298 some consideration.</dd>
5299 EOT
5300         }
5301         print <<EOT;
5302 <dt><b>author</b></dt>
5303 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5304 <dt><b>committer</b></dt>
5305 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5306 EOT
5307         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5308         if ($have_pickaxe) {
5309                 print <<EOT;
5310 <dt><b>pickaxe</b></dt>
5311 <dd>All commits that caused the string to appear or disappear from any file (changes that
5312 added, removed or "modified" the string) will be listed. This search can take a while and
5313 takes a lot of strain on the server, so please use it wisely.</dd>
5314 EOT
5315         }
5316         print "</dl>\n";
5317         git_footer_html();
5318 }
5319
5320 sub git_shortlog {
5321         my $head = git_get_head_hash($project);
5322         if (!defined $hash) {
5323                 $hash = $head;
5324         }
5325         if (!defined $page) {
5326                 $page = 0;
5327         }
5328         my $refs = git_get_references();
5329
5330         my @commitlist = parse_commits($hash, 101, (100 * $page));
5331
5332         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5333         my $next_link = '';
5334         if ($#commitlist >= 100) {
5335                 $next_link =
5336                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5337                                  -accesskey => "n", -title => "Alt-n"}, "next");
5338         }
5339
5340         git_header_html();
5341         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5342         git_print_header_div('summary', $project);
5343
5344         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5345
5346         git_footer_html();
5347 }
5348
5349 ## ......................................................................
5350 ## feeds (RSS, Atom; OPML)
5351
5352 sub git_feed {
5353         my $format = shift || 'atom';
5354         my ($have_blame) = gitweb_check_feature('blame');
5355
5356         # Atom: http://www.atomenabled.org/developers/syndication/
5357         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5358         if ($format ne 'rss' && $format ne 'atom') {
5359                 die_error(undef, "Unknown web feed format");
5360         }
5361
5362         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5363         my $head = $hash || 'HEAD';
5364         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5365
5366         my %latest_commit;
5367         my %latest_date;
5368         my $content_type = "application/$format+xml";
5369         if (defined $cgi->http('HTTP_ACCEPT') &&
5370                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5371                 # browser (feed reader) prefers text/xml
5372                 $content_type = 'text/xml';
5373         }
5374         if (defined($commitlist[0])) {
5375                 %latest_commit = %{$commitlist[0]};
5376                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5377                 print $cgi->header(
5378                         -type => $content_type,
5379                         -charset => 'utf-8',
5380                         -last_modified => $latest_date{'rfc2822'});
5381         } else {
5382                 print $cgi->header(
5383                         -type => $content_type,
5384                         -charset => 'utf-8');
5385         }
5386
5387         # Optimization: skip generating the body if client asks only
5388         # for Last-Modified date.
5389         return if ($cgi->request_method() eq 'HEAD');
5390
5391         # header variables
5392         my $title = "$site_name - $project/$action";
5393         my $feed_type = 'log';
5394         if (defined $hash) {
5395                 $title .= " - '$hash'";
5396                 $feed_type = 'branch log';
5397                 if (defined $file_name) {
5398                         $title .= " :: $file_name";
5399                         $feed_type = 'history';
5400                 }
5401         } elsif (defined $file_name) {
5402                 $title .= " - $file_name";
5403                 $feed_type = 'history';
5404         }
5405         $title .= " $feed_type";
5406         my $descr = git_get_project_description($project);
5407         if (defined $descr) {
5408                 $descr = esc_html($descr);
5409         } else {
5410                 $descr = "$project " .
5411                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5412                          " feed";
5413         }
5414         my $owner = git_get_project_owner($project);
5415         $owner = esc_html($owner);
5416
5417         #header
5418         my $alt_url;
5419         if (defined $file_name) {
5420                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5421         } elsif (defined $hash) {
5422                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5423         } else {
5424                 $alt_url = href(-full=>1, action=>"summary");
5425         }
5426         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5427         if ($format eq 'rss') {
5428                 print <<XML;
5429 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5430 <channel>
5431 XML
5432                 print "<title>$title</title>\n" .
5433                       "<link>$alt_url</link>\n" .
5434                       "<description>$descr</description>\n" .
5435                       "<language>en</language>\n";
5436         } elsif ($format eq 'atom') {
5437                 print <<XML;
5438 <feed xmlns="http://www.w3.org/2005/Atom">
5439 XML
5440                 print "<title>$title</title>\n" .
5441                       "<subtitle>$descr</subtitle>\n" .
5442                       '<link rel="alternate" type="text/html" href="' .
5443                       $alt_url . '" />' . "\n" .
5444                       '<link rel="self" type="' . $content_type . '" href="' .
5445                       $cgi->self_url() . '" />' . "\n" .
5446                       "<id>" . href(-full=>1) . "</id>\n" .
5447                       # use project owner for feed author
5448                       "<author><name>$owner</name></author>\n";
5449                 if (defined $favicon) {
5450                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5451                 }
5452                 if (defined $logo_url) {
5453                         # not twice as wide as tall: 72 x 27 pixels
5454                         print "<logo>" . esc_url($logo) . "</logo>\n";
5455                 }
5456                 if (! %latest_date) {
5457                         # dummy date to keep the feed valid until commits trickle in:
5458                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5459                 } else {
5460                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5461                 }
5462         }
5463
5464         # contents
5465         for (my $i = 0; $i <= $#commitlist; $i++) {
5466                 my %co = %{$commitlist[$i]};
5467                 my $commit = $co{'id'};
5468                 # we read 150, we always show 30 and the ones more recent than 48 hours
5469                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5470                         last;
5471                 }
5472                 my %cd = parse_date($co{'author_epoch'});
5473
5474                 # get list of changed files
5475                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5476                         $co{'parent'} || "--root",
5477                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5478                         or next;
5479                 my @difftree = map { chomp; $_ } <$fd>;
5480                 close $fd
5481                         or next;
5482
5483                 # print element (entry, item)
5484                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5485                 if ($format eq 'rss') {
5486                         print "<item>\n" .
5487                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5488                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5489                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5490                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5491                               "<link>$co_url</link>\n" .
5492                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5493                               "<content:encoded>" .
5494                               "<![CDATA[\n";
5495                 } elsif ($format eq 'atom') {
5496                         print "<entry>\n" .
5497                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5498                               "<updated>$cd{'iso-8601'}</updated>\n" .
5499                               "<author>\n" .
5500                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5501                         if ($co{'author_email'}) {
5502                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5503                         }
5504                         print "</author>\n" .
5505                               # use committer for contributor
5506                               "<contributor>\n" .
5507                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5508                         if ($co{'committer_email'}) {
5509                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5510                         }
5511                         print "</contributor>\n" .
5512                               "<published>$cd{'iso-8601'}</published>\n" .
5513                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5514                               "<id>$co_url</id>\n" .
5515                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5516                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5517                 }
5518                 my $comment = $co{'comment'};
5519                 print "<pre>\n";
5520                 foreach my $line (@$comment) {
5521                         $line = esc_html($line);
5522                         print "$line\n";
5523                 }
5524                 print "</pre><ul>\n";
5525                 foreach my $difftree_line (@difftree) {
5526                         my %difftree = parse_difftree_raw_line($difftree_line);
5527                         next if !$difftree{'from_id'};
5528
5529                         my $file = $difftree{'file'} || $difftree{'to_file'};
5530
5531                         print "<li>" .
5532                               "[" .
5533                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5534                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5535                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5536                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5537                                       -title => "diff"}, 'D');
5538                         if ($have_blame) {
5539                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5540                                                              file_name=>$file, hash_base=>$commit),
5541                                               -title => "blame"}, 'B');
5542                         }
5543                         # if this is not a feed of a file history
5544                         if (!defined $file_name || $file_name ne $file) {
5545                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5546                                                              file_name=>$file, hash=>$commit),
5547                                               -title => "history"}, 'H');
5548                         }
5549                         $file = esc_path($file);
5550                         print "] ".
5551                               "$file</li>\n";
5552                 }
5553                 if ($format eq 'rss') {
5554                         print "</ul>]]>\n" .
5555                               "</content:encoded>\n" .
5556                               "</item>\n";
5557                 } elsif ($format eq 'atom') {
5558                         print "</ul>\n</div>\n" .
5559                               "</content>\n" .
5560                               "</entry>\n";
5561                 }
5562         }
5563
5564         # end of feed
5565         if ($format eq 'rss') {
5566                 print "</channel>\n</rss>\n";
5567         }       elsif ($format eq 'atom') {
5568                 print "</feed>\n";
5569         }
5570 }
5571
5572 sub git_rss {
5573         git_feed('rss');
5574 }
5575
5576 sub git_atom {
5577         git_feed('atom');
5578 }
5579
5580 sub git_opml {
5581         my @list = git_get_projects_list();
5582
5583         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5584         print <<XML;
5585 <?xml version="1.0" encoding="utf-8"?>
5586 <opml version="1.0">
5587 <head>
5588   <title>$site_name OPML Export</title>
5589 </head>
5590 <body>
5591 <outline text="git RSS feeds">
5592 XML
5593
5594         foreach my $pr (@list) {
5595                 my %proj = %$pr;
5596                 my $head = git_get_head_hash($proj{'path'});
5597                 if (!defined $head) {
5598                         next;
5599                 }
5600                 $git_dir = "$projectroot/$proj{'path'}";
5601                 my %co = parse_commit($head);
5602                 if (!%co) {
5603                         next;
5604                 }
5605
5606                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5607                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5608                 my $html = "$my_url?p=$proj{'path'};a=summary";
5609                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5610         }
5611         print <<XML;
5612 </outline>
5613 </body>
5614 </opml>
5615 XML
5616 }