gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 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 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 373
 374 # version of the core git binary
 375 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 376
 377 $projects_list ||= $projectroot;
 378
 379 # ======================================================================
 380 # input validation and dispatch
 381 our $action = $cgi->param('a');
 382 if (defined $action) {
 383         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 384                 die_error(undef, "Invalid action parameter");
 385         }
 386 }
 387
 388 # parameters which are pathnames
 389 our $project = $cgi->param('p');
 390 if (defined $project) {
 391         if (!validate_pathname($project) ||
 392             !(-d "$projectroot/$project") ||
 393             !check_head_link("$projectroot/$project") ||
 394             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 395             ($strict_export && !project_in_list($project))) {
 396                 undef $project;
 397                 die_error(undef, "No such project");
 398         }
 399 }
 400
 401 our $file_name = $cgi->param('f');
 402 if (defined $file_name) {
 403         if (!validate_pathname($file_name)) {
 404                 die_error(undef, "Invalid file parameter");
 405         }
 406 }
 407
 408 our $file_parent = $cgi->param('fp');
 409 if (defined $file_parent) {
 410         if (!validate_pathname($file_parent)) {
 411                 die_error(undef, "Invalid file parent parameter");
 412         }
 413 }
 414
 415 # parameters which are refnames
 416 our $hash = $cgi->param('h');
 417 if (defined $hash) {
 418         if (!validate_refname($hash)) {
 419                 die_error(undef, "Invalid hash parameter");
 420         }
 421 }
 422
 423 our $hash_parent = $cgi->param('hp');
 424 if (defined $hash_parent) {
 425         if (!validate_refname($hash_parent)) {
 426                 die_error(undef, "Invalid hash parent parameter");
 427         }
 428 }
 429
 430 our $hash_base = $cgi->param('hb');
 431 if (defined $hash_base) {
 432         if (!validate_refname($hash_base)) {
 433                 die_error(undef, "Invalid hash base parameter");
 434         }
 435 }
 436
 437 my %allowed_options = (
 438         "--no-merges" => [ qw(rss atom log shortlog history) ],
 439 );
 440
 441 our @extra_options = $cgi->param('opt');
 442 if (defined @extra_options) {
 443         foreach my $opt (@extra_options) {
 444                 if (not exists $allowed_options{$opt}) {
 445                         die_error(undef, "Invalid option parameter");
 446                 }
 447                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 448                         die_error(undef, "Invalid option parameter for this action");
 449                 }
 450         }
 451 }
 452
 453 our $hash_parent_base = $cgi->param('hpb');
 454 if (defined $hash_parent_base) {
 455         if (!validate_refname($hash_parent_base)) {
 456                 die_error(undef, "Invalid hash parent base parameter");
 457         }
 458 }
 459
 460 # other parameters
 461 our $page = $cgi->param('pg');
 462 if (defined $page) {
 463         if ($page =~ m/[^0-9]/) {
 464                 die_error(undef, "Invalid page parameter");
 465         }
 466 }
 467
 468 our $searchtype = $cgi->param('st');
 469 if (defined $searchtype) {
 470         if ($searchtype =~ m/[^a-z]/) {
 471                 die_error(undef, "Invalid searchtype parameter");
 472         }
 473 }
 474
 475 our $searchtext = $cgi->param('s');
 476 our $search_regexp;
 477 if (defined $searchtext) {
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         $params{'project'} = $project unless exists $params{'project'};
 615
 616         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 617         if ($use_pathinfo) {
 618                 # use PATH_INFO for project name
 619                 $href .= "/$params{'project'}" if defined $params{'project'};
 620                 delete $params{'project'};
 621
 622                 # Summary just uses the project path URL
 623                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 624                         delete $params{'action'};
 625                 }
 626         }
 627
 628         # now encode the parameters explicitly
 629         my @result = ();
 630         for (my $i = 0; $i < @mapping; $i += 2) {
 631                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 632                 if (defined $params{$name}) {
 633                         if (ref($params{$name}) eq "ARRAY") {
 634                                 foreach my $par (@{$params{$name}}) {
 635                                         push @result, $symbol . "=" . esc_param($par);
 636                                 }
 637                         } else {
 638                                 push @result, $symbol . "=" . esc_param($params{$name});
 639                         }
 640                 }
 641         }
 642         $href .= "?" . join(';', @result) if scalar @result;
 643
 644         return $href;
 645 }
 646
 647
 648 ## ======================================================================
 649 ## validation, quoting/unquoting and escaping
 650
 651 sub validate_pathname {
 652         my $input = shift || return undef;
 653
 654         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 655         # at the beginning, at the end, and between slashes.
 656         # also this catches doubled slashes
 657         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 658                 return undef;
 659         }
 660         # no null characters
 661         if ($input =~ m!\0!) {
 662                 return undef;
 663         }
 664         return $input;
 665 }
 666
 667 sub validate_refname {
 668         my $input = shift || return undef;
 669
 670         # textual hashes are O.K.
 671         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 672                 return $input;
 673         }
 674         # it must be correct pathname
 675         $input = validate_pathname($input)
 676                 or return undef;
 677         # restrictions on ref name according to git-check-ref-format
 678         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 # decode sequences of octets in utf8 into Perl's internal form,
 685 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 686 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 687 sub to_utf8 {
 688         my $str = shift;
 689         my $res;
 690         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 691         if (defined $res) {
 692                 return $res;
 693         } else {
 694                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 695         }
 696 }
 697
 698 # quote unsafe chars, but keep the slash, even when it's not
 699 # correct, but quoted slashes look too horrible in bookmarks
 700 sub esc_param {
 701         my $str = shift;
 702         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 703         $str =~ s/\+/%2B/g;
 704         $str =~ s/ /\+/g;
 705         return $str;
 706 }
 707
 708 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 709 sub esc_url {
 710         my $str = shift;
 711         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 712         $str =~ s/\+/%2B/g;
 713         $str =~ s/ /\+/g;
 714         return $str;
 715 }
 716
 717 # replace invalid utf8 character with SUBSTITUTION sequence
 718 sub esc_html ($;%) {
 719         my $str = shift;
 720         my %opts = @_;
 721
 722         $str = to_utf8($str);
 723         $str = $cgi->escapeHTML($str);
 724         if ($opts{'-nbsp'}) {
 725                 $str =~ s/ /&nbsp;/g;
 726         }
 727         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 728         return $str;
 729 }
 730
 731 # quote control characters and escape filename to HTML
 732 sub esc_path {
 733         my $str = shift;
 734         my %opts = @_;
 735
 736         $str = to_utf8($str);
 737         $str = $cgi->escapeHTML($str);
 738         if ($opts{'-nbsp'}) {
 739                 $str =~ s/ /&nbsp;/g;
 740         }
 741         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 742         return $str;
 743 }
 744
 745 # Make control characters "printable", using character escape codes (CEC)
 746 sub quot_cec {
 747         my $cntrl = shift;
 748         my %es = ( # character escape codes, aka escape sequences
 749                    "\t" => '\t',   # tab            (HT)
 750                    "\n" => '\n',   # line feed      (LF)
 751                    "\r" => '\r',   # carrige return (CR)
 752                    "\f" => '\f',   # form feed      (FF)
 753                    "\b" => '\b',   # backspace      (BS)
 754                    "\a" => '\a',   # alarm (bell)   (BEL)
 755                    "\e" => '\e',   # escape         (ESC)
 756                    "\013" => '\v', # vertical tab   (VT)
 757                    "\000" => '\0', # nul character  (NUL)
 758                    );
 759         my $chr = ( (exists $es{$cntrl})
 760                     ? $es{$cntrl}
 761                     : sprintf('\%03o', ord($cntrl)) );
 762         return "<span class=\"cntrl\">$chr</span>";
 763 }
 764
 765 # Alternatively use unicode control pictures codepoints,
 766 # Unicode "printable representation" (PR)
 767 sub quot_upr {
 768         my $cntrl = shift;
 769         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 770         return "<span class=\"cntrl\">$chr</span>";
 771 }
 772
 773 # git may return quoted and escaped filenames
 774 sub unquote {
 775         my $str = shift;
 776
 777         sub unq {
 778                 my $seq = shift;
 779                 my %es = ( # character escape codes, aka escape sequences
 780                         't' => "\t",   # tab            (HT, TAB)
 781                         'n' => "\n",   # newline        (NL)
 782                         'r' => "\r",   # return         (CR)
 783                         'f' => "\f",   # form feed      (FF)
 784                         'b' => "\b",   # backspace      (BS)
 785                         'a' => "\a",   # alarm (bell)   (BEL)
 786                         'e' => "\e",   # escape         (ESC)
 787                         'v' => "\013", # vertical tab   (VT)
 788                 );
 789
 790                 if ($seq =~ m/^[0-7]{1,3}$/) {
 791                         # octal char sequence
 792                         return chr(oct($seq));
 793                 } elsif (exists $es{$seq}) {
 794                         # C escape sequence, aka character escape code
 795                         return $es{$seq}
 796                 }
 797                 # quoted ordinary character
 798                 return $seq;
 799         }
 800
 801         if ($str =~ m/^"(.*)"$/) {
 802                 # needs unquoting
 803                 $str = $1;
 804                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 805         }
 806         return $str;
 807 }
 808
 809 # escape tabs (convert tabs to spaces)
 810 sub untabify {
 811         my $line = shift;
 812
 813         while ((my $pos = index($line, "\t")) != -1) {
 814                 if (my $count = (8 - ($pos % 8))) {
 815                         my $spaces = ' ' x $count;
 816                         $line =~ s/\t/$spaces/;
 817                 }
 818         }
 819
 820         return $line;
 821 }
 822
 823 sub project_in_list {
 824         my $project = shift;
 825         my @list = git_get_projects_list();
 826         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 827 }
 828
 829 ## ----------------------------------------------------------------------
 830 ## HTML aware string manipulation
 831
 832 sub chop_str {
 833         my $str = shift;
 834         my $len = shift;
 835         my $add_len = shift || 10;
 836
 837         # allow only $len chars, but don't cut a word if it would fit in $add_len
 838         # if it doesn't fit, cut it if it's still longer than the dots we would add
 839         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 840         my $body = $1;
 841         my $tail = $2;
 842         if (length($tail) > 4) {
 843                 $tail = " ...";
 844                 $body =~ s/&[^;]*$//; # remove chopped character entities
 845         }
 846         return "$body$tail";
 847 }
 848
 849 # takes the same arguments as chop_str, but also wraps a <span> around the
 850 # result with a title attribute if it does get chopped. Additionally, the
 851 # string is HTML-escaped.
 852 sub chop_and_escape_str {
 853         my $str = shift;
 854         my $len = shift;
 855         my $add_len = shift || 10;
 856
 857         my $chopped = chop_str($str, $len, $add_len);
 858         if ($chopped eq $str) {
 859                 return esc_html($chopped);
 860         } else {
 861                 return qq{<span title="} . esc_html($str) . qq{">} .
 862                         esc_html($chopped) . qq{</span>};
 863         }
 864 }
 865
 866 ## ----------------------------------------------------------------------
 867 ## functions returning short strings
 868
 869 # CSS class for given age value (in seconds)
 870 sub age_class {
 871         my $age = shift;
 872
 873         if (!defined $age) {
 874                 return "noage";
 875         } elsif ($age < 60*60*2) {
 876                 return "age0";
 877         } elsif ($age < 60*60*24*2) {
 878                 return "age1";
 879         } else {
 880                 return "age2";
 881         }
 882 }
 883
 884 # convert age in seconds to "nn units ago" string
 885 sub age_string {
 886         my $age = shift;
 887         my $age_str;
 888
 889         if ($age > 60*60*24*365*2) {
 890                 $age_str = (int $age/60/60/24/365);
 891                 $age_str .= " years ago";
 892         } elsif ($age > 60*60*24*(365/12)*2) {
 893                 $age_str = int $age/60/60/24/(365/12);
 894                 $age_str .= " months ago";
 895         } elsif ($age > 60*60*24*7*2) {
 896                 $age_str = int $age/60/60/24/7;
 897                 $age_str .= " weeks ago";
 898         } elsif ($age > 60*60*24*2) {
 899                 $age_str = int $age/60/60/24;
 900                 $age_str .= " days ago";
 901         } elsif ($age > 60*60*2) {
 902                 $age_str = int $age/60/60;
 903                 $age_str .= " hours ago";
 904         } elsif ($age > 60*2) {
 905                 $age_str = int $age/60;
 906                 $age_str .= " min ago";
 907         } elsif ($age > 2) {
 908                 $age_str = int $age;
 909                 $age_str .= " sec ago";
 910         } else {
 911                 $age_str .= " right now";
 912         }
 913         return $age_str;
 914 }
 915
 916 use constant {
 917         S_IFINVALID => 0030000,
 918         S_IFGITLINK => 0160000,
 919 };
 920
 921 # submodule/subproject, a commit object reference
 922 sub S_ISGITLINK($) {
 923         my $mode = shift;
 924
 925         return (($mode & S_IFMT) == S_IFGITLINK)
 926 }
 927
 928 # convert file mode in octal to symbolic file mode string
 929 sub mode_str {
 930         my $mode = oct shift;
 931
 932         if (S_ISGITLINK($mode)) {
 933                 return 'm---------';
 934         } elsif (S_ISDIR($mode & S_IFMT)) {
 935                 return 'drwxr-xr-x';
 936         } elsif (S_ISLNK($mode)) {
 937                 return 'lrwxrwxrwx';
 938         } elsif (S_ISREG($mode)) {
 939                 # git cares only about the executable bit
 940                 if ($mode & S_IXUSR) {
 941                         return '-rwxr-xr-x';
 942                 } else {
 943                         return '-rw-r--r--';
 944                 };
 945         } else {
 946                 return '----------';
 947         }
 948 }
 949
 950 # convert file mode in octal to file type string
 951 sub file_type {
 952         my $mode = shift;
 953
 954         if ($mode !~ m/^[0-7]+$/) {
 955                 return $mode;
 956         } else {
 957                 $mode = oct $mode;
 958         }
 959
 960         if (S_ISGITLINK($mode)) {
 961                 return "submodule";
 962         } elsif (S_ISDIR($mode & S_IFMT)) {
 963                 return "directory";
 964         } elsif (S_ISLNK($mode)) {
 965                 return "symlink";
 966         } elsif (S_ISREG($mode)) {
 967                 return "file";
 968         } else {
 969                 return "unknown";
 970         }
 971 }
 972
 973 # convert file mode in octal to file type description string
 974 sub file_type_long {
 975         my $mode = shift;
 976
 977         if ($mode !~ m/^[0-7]+$/) {
 978                 return $mode;
 979         } else {
 980                 $mode = oct $mode;
 981         }
 982
 983         if (S_ISGITLINK($mode)) {
 984                 return "submodule";
 985         } elsif (S_ISDIR($mode & S_IFMT)) {
 986                 return "directory";
 987         } elsif (S_ISLNK($mode)) {
 988                 return "symlink";
 989         } elsif (S_ISREG($mode)) {
 990                 if ($mode & S_IXUSR) {
 991                         return "executable";
 992                 } else {
 993                         return "file";
 994                 };
 995         } else {
 996                 return "unknown";
 997         }
 998 }
 999
1000
1001 ## ----------------------------------------------------------------------
1002 ## functions returning short HTML fragments, or transforming HTML fragments
1003 ## which don't belong to other sections
1004
1005 # format line of commit message.
1006 sub format_log_line_html {
1007         my $line = shift;
1008
1009         $line = esc_html($line, -nbsp=>1);
1010         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1011                 my $hash_text = $1;
1012                 my $link =
1013                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1014                                 -class => "text"}, $hash_text);
1015                 $line =~ s/$hash_text/$link/;
1016         }
1017         return $line;
1018 }
1019
1020 # format marker of refs pointing to given object
1021 sub format_ref_marker {
1022         my ($refs, $id) = @_;
1023         my $markers = '';
1024
1025         if (defined $refs->{$id}) {
1026                 foreach my $ref (@{$refs->{$id}}) {
1027                         my ($type, $name) = qw();
1028                         # e.g. tags/v2.6.11 or heads/next
1029                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1030                                 $type = $1;
1031                                 $name = $2;
1032                         } else {
1033                                 $type = "ref";
1034                                 $name = $ref;
1035                         }
1036
1037                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1038                                     esc_html($name) . "</span>";
1039                 }
1040         }
1041
1042         if ($markers) {
1043                 return ' <span class="refs">'. $markers . '</span>';
1044         } else {
1045                 return "";
1046         }
1047 }
1048
1049 # format, perhaps shortened and with markers, title line
1050 sub format_subject_html {
1051         my ($long, $short, $href, $extra) = @_;
1052         $extra = '' unless defined($extra);
1053
1054         if (length($short) < length($long)) {
1055                 return $cgi->a({-href => $href, -class => "list subject",
1056                                 -title => to_utf8($long)},
1057                        esc_html($short) . $extra);
1058         } else {
1059                 return $cgi->a({-href => $href, -class => "list subject"},
1060                        esc_html($long)  . $extra);
1061         }
1062 }
1063
1064 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1065 sub format_git_diff_header_line {
1066         my $line = shift;
1067         my $diffinfo = shift;
1068         my ($from, $to) = @_;
1069
1070         if ($diffinfo->{'nparents'}) {
1071                 # combined diff
1072                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1073                 if ($to->{'href'}) {
1074                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1075                                          esc_path($to->{'file'}));
1076                 } else { # file was deleted (no href)
1077                         $line .= esc_path($to->{'file'});
1078                 }
1079         } else {
1080                 # "ordinary" diff
1081                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1082                 if ($from->{'href'}) {
1083                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1084                                          'a/' . esc_path($from->{'file'}));
1085                 } else { # file was added (no href)
1086                         $line .= 'a/' . esc_path($from->{'file'});
1087                 }
1088                 $line .= ' ';
1089                 if ($to->{'href'}) {
1090                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1091                                          'b/' . esc_path($to->{'file'}));
1092                 } else { # file was deleted
1093                         $line .= 'b/' . esc_path($to->{'file'});
1094                 }
1095         }
1096
1097         return "<div class=\"diff header\">$line</div>\n";
1098 }
1099
1100 # format extended diff header line, before patch itself
1101 sub format_extended_diff_header_line {
1102         my $line = shift;
1103         my $diffinfo = shift;
1104         my ($from, $to) = @_;
1105
1106         # match <path>
1107         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1108                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1109                                        esc_path($from->{'file'}));
1110         }
1111         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1112                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1113                                  esc_path($to->{'file'}));
1114         }
1115         # match single <mode>
1116         if ($line =~ m/\s(\d{6})$/) {
1117                 $line .= '<span class="info"> (' .
1118                          file_type_long($1) .
1119                          ')</span>';
1120         }
1121         # match <hash>
1122         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1123                 # can match only for combined diff
1124                 $line = 'index ';
1125                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1126                         if ($from->{'href'}[$i]) {
1127                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1128                                                   -class=>"hash"},
1129                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1130                         } else {
1131                                 $line .= '0' x 7;
1132                         }
1133                         # separator
1134                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1135                 }
1136                 $line .= '..';
1137                 if ($to->{'href'}) {
1138                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1139                                          substr($diffinfo->{'to_id'},0,7));
1140                 } else {
1141                         $line .= '0' x 7;
1142                 }
1143
1144         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1145                 # can match only for ordinary diff
1146                 my ($from_link, $to_link);
1147                 if ($from->{'href'}) {
1148                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1149                                              substr($diffinfo->{'from_id'},0,7));
1150                 } else {
1151                         $from_link = '0' x 7;
1152                 }
1153                 if ($to->{'href'}) {
1154                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1155                                            substr($diffinfo->{'to_id'},0,7));
1156                 } else {
1157                         $to_link = '0' x 7;
1158                 }
1159                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1160                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1161         }
1162
1163         return $line . "<br/>\n";
1164 }
1165
1166 # format from-file/to-file diff header
1167 sub format_diff_from_to_header {
1168         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1169         my $line;
1170         my $result = '';
1171
1172         $line = $from_line;
1173         #assert($line =~ m/^---/) if DEBUG;
1174         # no extra formatting for "^--- /dev/null"
1175         if (! $diffinfo->{'nparents'}) {
1176                 # ordinary (single parent) diff
1177                 if ($line =~ m!^--- "?a/!) {
1178                         if ($from->{'href'}) {
1179                                 $line = '--- a/' .
1180                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1181                                                 esc_path($from->{'file'}));
1182                         } else {
1183                                 $line = '--- a/' .
1184                                         esc_path($from->{'file'});
1185                         }
1186                 }
1187                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1188
1189         } else {
1190                 # combined diff (merge commit)
1191                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1192                         if ($from->{'href'}[$i]) {
1193                                 $line = '--- ' .
1194                                         $cgi->a({-href=>href(action=>"blobdiff",
1195                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1196                                                              hash_parent_base=>$parents[$i],
1197                                                              file_parent=>$from->{'file'}[$i],
1198                                                              hash=>$diffinfo->{'to_id'},
1199                                                              hash_base=>$hash,
1200                                                              file_name=>$to->{'file'}),
1201                                                  -class=>"path",
1202                                                  -title=>"diff" . ($i+1)},
1203                                                 $i+1) .
1204                                         '/' .
1205                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1206                                                 esc_path($from->{'file'}[$i]));
1207                         } else {
1208                                 $line = '--- /dev/null';
1209                         }
1210                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1211                 }
1212         }
1213
1214         $line = $to_line;
1215         #assert($line =~ m/^\+\+\+/) if DEBUG;
1216         # no extra formatting for "^+++ /dev/null"
1217         if ($line =~ m!^\+\+\+ "?b/!) {
1218                 if ($to->{'href'}) {
1219                         $line = '+++ b/' .
1220                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1221                                         esc_path($to->{'file'}));
1222                 } else {
1223                         $line = '+++ b/' .
1224                                 esc_path($to->{'file'});
1225                 }
1226         }
1227         $result .= qq!<div class="diff to_file">$line</div>\n!;
1228
1229         return $result;
1230 }
1231
1232 # create note for patch simplified by combined diff
1233 sub format_diff_cc_simplified {
1234         my ($diffinfo, @parents) = @_;
1235         my $result = '';
1236
1237         $result .= "<div class=\"diff header\">" .
1238                    "diff --cc ";
1239         if (!is_deleted($diffinfo)) {
1240                 $result .= $cgi->a({-href => href(action=>"blob",
1241                                                   hash_base=>$hash,
1242                                                   hash=>$diffinfo->{'to_id'},
1243                                                   file_name=>$diffinfo->{'to_file'}),
1244                                     -class => "path"},
1245                                    esc_path($diffinfo->{'to_file'}));
1246         } else {
1247                 $result .= esc_path($diffinfo->{'to_file'});
1248         }
1249         $result .= "</div>\n" . # class="diff header"
1250                    "<div class=\"diff nodifferences\">" .
1251                    "Simple merge" .
1252                    "</div>\n"; # class="diff nodifferences"
1253
1254         return $result;
1255 }
1256
1257 # format patch (diff) line (not to be used for diff headers)
1258 sub format_diff_line {
1259         my $line = shift;
1260         my ($from, $to) = @_;
1261         my $diff_class = "";
1262
1263         chomp $line;
1264
1265         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1266                 # combined diff
1267                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1268                 if ($line =~ m/^\@{3}/) {
1269                         $diff_class = " chunk_header";
1270                 } elsif ($line =~ m/^\\/) {
1271                         $diff_class = " incomplete";
1272                 } elsif ($prefix =~ tr/+/+/) {
1273                         $diff_class = " add";
1274                 } elsif ($prefix =~ tr/-/-/) {
1275                         $diff_class = " rem";
1276                 }
1277         } else {
1278                 # assume ordinary diff
1279                 my $char = substr($line, 0, 1);
1280                 if ($char eq '+') {
1281                         $diff_class = " add";
1282                 } elsif ($char eq '-') {
1283                         $diff_class = " rem";
1284                 } elsif ($char eq '@') {
1285                         $diff_class = " chunk_header";
1286                 } elsif ($char eq "\\") {
1287                         $diff_class = " incomplete";
1288                 }
1289         }
1290         $line = untabify($line);
1291         if ($from && $to && $line =~ m/^\@{2} /) {
1292                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1293                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1294
1295                 $from_lines = 0 unless defined $from_lines;
1296                 $to_lines   = 0 unless defined $to_lines;
1297
1298                 if ($from->{'href'}) {
1299                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1300                                              -class=>"list"}, $from_text);
1301                 }
1302                 if ($to->{'href'}) {
1303                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1304                                              -class=>"list"}, $to_text);
1305                 }
1306                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1307                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1308                 return "<div class=\"diff$diff_class\">$line</div>\n";
1309         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1310                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1311                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1312
1313                 @from_text = split(' ', $ranges);
1314                 for (my $i = 0; $i < @from_text; ++$i) {
1315                         ($from_start[$i], $from_nlines[$i]) =
1316                                 (split(',', substr($from_text[$i], 1)), 0);
1317                 }
1318
1319                 $to_text   = pop @from_text;
1320                 $to_start  = pop @from_start;
1321                 $to_nlines = pop @from_nlines;
1322
1323                 $line = "<span class=\"chunk_info\">$prefix ";
1324                 for (my $i = 0; $i < @from_text; ++$i) {
1325                         if ($from->{'href'}[$i]) {
1326                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1327                                                   -class=>"list"}, $from_text[$i]);
1328                         } else {
1329                                 $line .= $from_text[$i];
1330                         }
1331                         $line .= " ";
1332                 }
1333                 if ($to->{'href'}) {
1334                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1335                                           -class=>"list"}, $to_text);
1336                 } else {
1337                         $line .= $to_text;
1338                 }
1339                 $line .= " $prefix</span>" .
1340                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1341                 return "<div class=\"diff$diff_class\">$line</div>\n";
1342         }
1343         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1344 }
1345
1346 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1347 # linked.  Pass the hash of the tree/commit to snapshot.
1348 sub format_snapshot_links {
1349         my ($hash) = @_;
1350         my @snapshot_fmts = gitweb_check_feature('snapshot');
1351         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1352         my $num_fmts = @snapshot_fmts;
1353         if ($num_fmts > 1) {
1354                 # A parenthesized list of links bearing format names.
1355                 # e.g. "snapshot (_tar.gz_ _zip_)"
1356                 return "snapshot (" . join(' ', map
1357                         $cgi->a({
1358                                 -href => href(
1359                                         action=>"snapshot",
1360                                         hash=>$hash,
1361                                         snapshot_format=>$_
1362                                 )
1363                         }, $known_snapshot_formats{$_}{'display'})
1364                 , @snapshot_fmts) . ")";
1365         } elsif ($num_fmts == 1) {
1366                 # A single "snapshot" link whose tooltip bears the format name.
1367                 # i.e. "_snapshot_"
1368                 my ($fmt) = @snapshot_fmts;
1369                 return
1370                         $cgi->a({
1371                                 -href => href(
1372                                         action=>"snapshot",
1373                                         hash=>$hash,
1374                                         snapshot_format=>$fmt
1375                                 ),
1376                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1377                         }, "snapshot");
1378         } else { # $num_fmts == 0
1379                 return undef;
1380         }
1381 }
1382
1383 ## ----------------------------------------------------------------------
1384 ## git utility subroutines, invoking git commands
1385
1386 # returns path to the core git executable and the --git-dir parameter as list
1387 sub git_cmd {
1388         return $GIT, '--git-dir='.$git_dir;
1389 }
1390
1391 # returns path to the core git executable and the --git-dir parameter as string
1392 sub git_cmd_str {
1393         return join(' ', git_cmd());
1394 }
1395
1396 # get HEAD ref of given project as hash
1397 sub git_get_head_hash {
1398         my $project = shift;
1399         my $o_git_dir = $git_dir;
1400         my $retval = undef;
1401         $git_dir = "$projectroot/$project";
1402         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1403                 my $head = <$fd>;
1404                 close $fd;
1405                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1406                         $retval = $1;
1407                 }
1408         }
1409         if (defined $o_git_dir) {
1410                 $git_dir = $o_git_dir;
1411         }
1412         return $retval;
1413 }
1414
1415 # get type of given object
1416 sub git_get_type {
1417         my $hash = shift;
1418
1419         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1420         my $type = <$fd>;
1421         close $fd or return;
1422         chomp $type;
1423         return $type;
1424 }
1425
1426 sub git_get_project_config {
1427         my ($key, $type) = @_;
1428
1429         return unless ($key);
1430         $key =~ s/^gitweb\.//;
1431         return if ($key =~ m/\W/);
1432
1433         my @x = (git_cmd(), 'config');
1434         if (defined $type) { push @x, $type; }
1435         push @x, "--get";
1436         push @x, "gitweb.$key";
1437         my $val = qx(@x);
1438         chomp $val;
1439         return ($val);
1440 }
1441
1442 # get hash of given path at given ref
1443 sub git_get_hash_by_path {
1444         my $base = shift;
1445         my $path = shift || return undef;
1446         my $type = shift;
1447
1448         $path =~ s,/+$,,;
1449
1450         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1451                 or die_error(undef, "Open git-ls-tree failed");
1452         my $line = <$fd>;
1453         close $fd or return undef;
1454
1455         if (!defined $line) {
1456                 # there is no tree or hash given by $path at $base
1457                 return undef;
1458         }
1459
1460         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1461         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1462         if (defined $type && $type ne $2) {
1463                 # type doesn't match
1464                 return undef;
1465         }
1466         return $3;
1467 }
1468
1469 # get path of entry with given hash at given tree-ish (ref)
1470 # used to get 'from' filename for combined diff (merge commit) for renames
1471 sub git_get_path_by_hash {
1472         my $base = shift || return;
1473         my $hash = shift || return;
1474
1475         local $/ = "\0";
1476
1477         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1478                 or return undef;
1479         while (my $line = <$fd>) {
1480                 chomp $line;
1481
1482                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1483                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1484                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1485                         close $fd;
1486                         return $1;
1487                 }
1488         }
1489         close $fd;
1490         return undef;
1491 }
1492
1493 ## ......................................................................
1494 ## git utility functions, directly accessing git repository
1495
1496 sub git_get_project_description {
1497         my $path = shift;
1498
1499         open my $fd, "$projectroot/$path/description" or return undef;
1500         my $descr = <$fd>;
1501         close $fd;
1502         if (defined $descr) {
1503                 chomp $descr;
1504         }
1505         return $descr;
1506 }
1507
1508 sub git_get_project_url_list {
1509         my $path = shift;
1510
1511         open my $fd, "$projectroot/$path/cloneurl" or return;
1512         my @git_project_url_list = map { chomp; $_ } <$fd>;
1513         close $fd;
1514
1515         return wantarray ? @git_project_url_list : \@git_project_url_list;
1516 }
1517
1518 sub git_get_projects_list {
1519         my ($filter) = @_;
1520         my @list;
1521
1522         $filter ||= '';
1523         $filter =~ s/\.git$//;
1524
1525         my ($check_forks) = gitweb_check_feature('forks');
1526
1527         if (-d $projects_list) {
1528                 # search in directory
1529                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1530                 # remove the trailing "/"
1531                 $dir =~ s!/+$!!;
1532                 my $pfxlen = length("$dir");
1533                 my $pfxdepth = ($dir =~ tr!/!!);
1534
1535                 File::Find::find({
1536                         follow_fast => 1, # follow symbolic links
1537                         follow_skip => 2, # ignore duplicates
1538                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1539                         wanted => sub {
1540                                 # skip project-list toplevel, if we get it.
1541                                 return if (m!^[/.]$!);
1542                                 # only directories can be git repositories
1543                                 return unless (-d $_);
1544                                 # don't traverse too deep (Find is super slow on os x)
1545                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1546                                         $File::Find::prune = 1;
1547                                         return;
1548                                 }
1549
1550                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1551                                 # we check related file in $projectroot
1552                                 if ($check_forks and $subdir =~ m#/.#) {
1553                                         $File::Find::prune = 1;
1554                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1555                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1556                                         $File::Find::prune = 1;
1557                                 }
1558                         },
1559                 }, "$dir");
1560
1561         } elsif (-f $projects_list) {
1562                 # read from file(url-encoded):
1563                 # 'git%2Fgit.git Linus+Torvalds'
1564                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1565                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1566                 my %paths;
1567                 open my ($fd), $projects_list or return;
1568         PROJECT:
1569                 while (my $line = <$fd>) {
1570                         chomp $line;
1571                         my ($path, $owner) = split ' ', $line;
1572                         $path = unescape($path);
1573                         $owner = unescape($owner);
1574                         if (!defined $path) {
1575                                 next;
1576                         }
1577                         if ($filter ne '') {
1578                                 # looking for forks;
1579                                 my $pfx = substr($path, 0, length($filter));
1580                                 if ($pfx ne $filter) {
1581                                         next PROJECT;
1582                                 }
1583                                 my $sfx = substr($path, length($filter));
1584                                 if ($sfx !~ /^\/.*\.git$/) {
1585                                         next PROJECT;
1586                                 }
1587                         } elsif ($check_forks) {
1588                         PATH:
1589                                 foreach my $filter (keys %paths) {
1590                                         # looking for forks;
1591                                         my $pfx = substr($path, 0, length($filter));
1592                                         if ($pfx ne $filter) {
1593                                                 next PATH;
1594                                         }
1595                                         my $sfx = substr($path, length($filter));
1596                                         if ($sfx !~ /^\/.*\.git$/) {
1597                                                 next PATH;
1598                                         }
1599                                         # is a fork, don't include it in
1600                                         # the list
1601                                         next PROJECT;
1602                                 }
1603                         }
1604                         if (check_export_ok("$projectroot/$path")) {
1605                                 my $pr = {
1606                                         path => $path,
1607                                         owner => to_utf8($owner),
1608                                 };
1609                                 push @list, $pr;
1610                                 (my $forks_path = $path) =~ s/\.git$//;
1611                                 $paths{$forks_path}++;
1612                         }
1613                 }
1614                 close $fd;
1615         }
1616         return @list;
1617 }
1618
1619 our $gitweb_project_owner = undef;
1620 sub git_get_project_list_from_file {
1621
1622         return if (defined $gitweb_project_owner);
1623
1624         $gitweb_project_owner = {};
1625         # read from file (url-encoded):
1626         # 'git%2Fgit.git Linus+Torvalds'
1627         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1628         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1629         if (-f $projects_list) {
1630                 open (my $fd , $projects_list);
1631                 while (my $line = <$fd>) {
1632                         chomp $line;
1633                         my ($pr, $ow) = split ' ', $line;
1634                         $pr = unescape($pr);
1635                         $ow = unescape($ow);
1636                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1637                 }
1638                 close $fd;
1639         }
1640 }
1641
1642 sub git_get_project_owner {
1643         my $project = shift;
1644         my $owner;
1645
1646         return undef unless $project;
1647
1648         if (!defined $gitweb_project_owner) {
1649                 git_get_project_list_from_file();
1650         }
1651
1652         if (exists $gitweb_project_owner->{$project}) {
1653                 $owner = $gitweb_project_owner->{$project};
1654         }
1655         if (!defined $owner) {
1656                 $owner = get_file_owner("$projectroot/$project");
1657         }
1658
1659         return $owner;
1660 }
1661
1662 sub git_get_last_activity {
1663         my ($path) = @_;
1664         my $fd;
1665
1666         $git_dir = "$projectroot/$path";
1667         open($fd, "-|", git_cmd(), 'for-each-ref',
1668              '--format=%(committer)',
1669              '--sort=-committerdate',
1670              '--count=1',
1671              'refs/heads') or return;
1672         my $most_recent = <$fd>;
1673         close $fd or return;
1674         if (defined $most_recent &&
1675             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1676                 my $timestamp = $1;
1677                 my $age = time - $timestamp;
1678                 return ($age, age_string($age));
1679         }
1680         return (undef, undef);
1681 }
1682
1683 sub git_get_references {
1684         my $type = shift || "";
1685         my %refs;
1686         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1687         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1688         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1689                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1690                 or return;
1691
1692         while (my $line = <$fd>) {
1693                 chomp $line;
1694                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1695                         if (defined $refs{$1}) {
1696                                 push @{$refs{$1}}, $2;
1697                         } else {
1698                                 $refs{$1} = [ $2 ];
1699                         }
1700                 }
1701         }
1702         close $fd or return;
1703         return \%refs;
1704 }
1705
1706 sub git_get_rev_name_tags {
1707         my $hash = shift || return undef;
1708
1709         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1710                 or return;
1711         my $name_rev = <$fd>;
1712         close $fd;
1713
1714         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1715                 return $1;
1716         } else {
1717                 # catches also '$hash undefined' output
1718                 return undef;
1719         }
1720 }
1721
1722 ## ----------------------------------------------------------------------
1723 ## parse to hash functions
1724
1725 sub parse_date {
1726         my $epoch = shift;
1727         my $tz = shift || "-0000";
1728
1729         my %date;
1730         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1731         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1732         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1733         $date{'hour'} = $hour;
1734         $date{'minute'} = $min;
1735         $date{'mday'} = $mday;
1736         $date{'day'} = $days[$wday];
1737         $date{'month'} = $months[$mon];
1738         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1739                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1740         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1741                              $mday, $months[$mon], $hour ,$min;
1742         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1743                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1744
1745         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1746         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1747         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1748         $date{'hour_local'} = $hour;
1749         $date{'minute_local'} = $min;
1750         $date{'tz_local'} = $tz;
1751         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1752                                   1900+$year, $mon+1, $mday,
1753                                   $hour, $min, $sec, $tz);
1754         return %date;
1755 }
1756
1757 sub parse_tag {
1758         my $tag_id = shift;
1759         my %tag;
1760         my @comment;
1761
1762         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1763         $tag{'id'} = $tag_id;
1764         while (my $line = <$fd>) {
1765                 chomp $line;
1766                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1767                         $tag{'object'} = $1;
1768                 } elsif ($line =~ m/^type (.+)$/) {
1769                         $tag{'type'} = $1;
1770                 } elsif ($line =~ m/^tag (.+)$/) {
1771                         $tag{'name'} = $1;
1772                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1773                         $tag{'author'} = $1;
1774                         $tag{'epoch'} = $2;
1775                         $tag{'tz'} = $3;
1776                 } elsif ($line =~ m/--BEGIN/) {
1777                         push @comment, $line;
1778                         last;
1779                 } elsif ($line eq "") {
1780                         last;
1781                 }
1782         }
1783         push @comment, <$fd>;
1784         $tag{'comment'} = \@comment;
1785         close $fd or return;
1786         if (!defined $tag{'name'}) {
1787                 return
1788         };
1789         return %tag
1790 }
1791
1792 sub parse_commit_text {
1793         my ($commit_text, $withparents) = @_;
1794         my @commit_lines = split '\n', $commit_text;
1795         my %co;
1796
1797         pop @commit_lines; # Remove '\0'
1798
1799         if (! @commit_lines) {
1800                 return;
1801         }
1802
1803         my $header = shift @commit_lines;
1804         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1805                 return;
1806         }
1807         ($co{'id'}, my @parents) = split ' ', $header;
1808         while (my $line = shift @commit_lines) {
1809                 last if $line eq "\n";
1810                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1811                         $co{'tree'} = $1;
1812                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1813                         push @parents, $1;
1814                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1815                         $co{'author'} = $1;
1816                         $co{'author_epoch'} = $2;
1817                         $co{'author_tz'} = $3;
1818                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1819                                 $co{'author_name'}  = $1;
1820                                 $co{'author_email'} = $2;
1821                         } else {
1822                                 $co{'author_name'} = $co{'author'};
1823                         }
1824                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1825                         $co{'committer'} = $1;
1826                         $co{'committer_epoch'} = $2;
1827                         $co{'committer_tz'} = $3;
1828                         $co{'committer_name'} = $co{'committer'};
1829                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1830                                 $co{'committer_name'}  = $1;
1831                                 $co{'committer_email'} = $2;
1832                         } else {
1833                                 $co{'committer_name'} = $co{'committer'};
1834                         }
1835                 }
1836         }
1837         if (!defined $co{'tree'}) {
1838                 return;
1839         };
1840         $co{'parents'} = \@parents;
1841         $co{'parent'} = $parents[0];
1842
1843         foreach my $title (@commit_lines) {
1844                 $title =~ s/^    //;
1845                 if ($title ne "") {
1846                         $co{'title'} = chop_str($title, 80, 5);
1847                         # remove leading stuff of merges to make the interesting part visible
1848                         if (length($title) > 50) {
1849                                 $title =~ s/^Automatic //;
1850                                 $title =~ s/^merge (of|with) /Merge ... /i;
1851                                 if (length($title) > 50) {
1852                                         $title =~ s/(http|rsync):\/\///;
1853                                 }
1854                                 if (length($title) > 50) {
1855                                         $title =~ s/(master|www|rsync)\.//;
1856                                 }
1857                                 if (length($title) > 50) {
1858                                         $title =~ s/kernel.org:?//;
1859                                 }
1860                                 if (length($title) > 50) {
1861                                         $title =~ s/\/pub\/scm//;
1862                                 }
1863                         }
1864                         $co{'title_short'} = chop_str($title, 50, 5);
1865                         last;
1866                 }
1867         }
1868         if ($co{'title'} eq "") {
1869                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1870         }
1871         # remove added spaces
1872         foreach my $line (@commit_lines) {
1873                 $line =~ s/^    //;
1874         }
1875         $co{'comment'} = \@commit_lines;
1876
1877         my $age = time - $co{'committer_epoch'};
1878         $co{'age'} = $age;
1879         $co{'age_string'} = age_string($age);
1880         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1881         if ($age > 60*60*24*7*2) {
1882                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1883                 $co{'age_string_age'} = $co{'age_string'};
1884         } else {
1885                 $co{'age_string_date'} = $co{'age_string'};
1886                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1887         }
1888         return %co;
1889 }
1890
1891 sub parse_commit {
1892         my ($commit_id) = @_;
1893         my %co;
1894
1895         local $/ = "\0";
1896
1897         open my $fd, "-|", git_cmd(), "rev-list",
1898                 "--parents",
1899                 "--header",
1900                 "--max-count=1",
1901                 $commit_id,
1902                 "--",
1903                 or die_error(undef, "Open git-rev-list failed");
1904         %co = parse_commit_text(<$fd>, 1);
1905         close $fd;
1906
1907         return %co;
1908 }
1909
1910 sub parse_commits {
1911         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1912         my @cos;
1913
1914         $maxcount ||= 1;
1915         $skip ||= 0;
1916
1917         local $/ = "\0";
1918
1919         open my $fd, "-|", git_cmd(), "rev-list",
1920                 "--header",
1921                 ($arg ? ($arg) : ()),
1922                 ("--max-count=" . $maxcount),
1923                 ("--skip=" . $skip),
1924                 @extra_options,
1925                 $commit_id,
1926                 "--",
1927                 ($filename ? ($filename) : ())
1928                 or die_error(undef, "Open git-rev-list failed");
1929         while (my $line = <$fd>) {
1930                 my %co = parse_commit_text($line);
1931                 push @cos, \%co;
1932         }
1933         close $fd;
1934
1935         return wantarray ? @cos : \@cos;
1936 }
1937
1938 # parse ref from ref_file, given by ref_id, with given type
1939 sub parse_ref {
1940         my $ref_file = shift;
1941         my $ref_id = shift;
1942         my $type = shift || git_get_type($ref_id);
1943         my %ref_item;
1944
1945         $ref_item{'type'} = $type;
1946         $ref_item{'id'} = $ref_id;
1947         $ref_item{'epoch'} = 0;
1948         $ref_item{'age'} = "unknown";
1949         if ($type eq "tag") {
1950                 my %tag = parse_tag($ref_id);
1951                 $ref_item{'comment'} = $tag{'comment'};
1952                 if ($tag{'type'} eq "commit") {
1953                         my %co = parse_commit($tag{'object'});
1954                         $ref_item{'epoch'} = $co{'committer_epoch'};
1955                         $ref_item{'age'} = $co{'age_string'};
1956                 } elsif (defined($tag{'epoch'})) {
1957                         my $age = time - $tag{'epoch'};
1958                         $ref_item{'epoch'} = $tag{'epoch'};
1959                         $ref_item{'age'} = age_string($age);
1960                 }
1961                 $ref_item{'reftype'} = $tag{'type'};
1962                 $ref_item{'name'} = $tag{'name'};
1963                 $ref_item{'refid'} = $tag{'object'};
1964         } elsif ($type eq "commit"){
1965                 my %co = parse_commit($ref_id);
1966                 $ref_item{'reftype'} = "commit";
1967                 $ref_item{'name'} = $ref_file;
1968                 $ref_item{'title'} = $co{'title'};
1969                 $ref_item{'refid'} = $ref_id;
1970                 $ref_item{'epoch'} = $co{'committer_epoch'};
1971                 $ref_item{'age'} = $co{'age_string'};
1972         } else {
1973                 $ref_item{'reftype'} = $type;
1974                 $ref_item{'name'} = $ref_file;
1975                 $ref_item{'refid'} = $ref_id;
1976         }
1977
1978         return %ref_item;
1979 }
1980
1981 # parse line of git-diff-tree "raw" output
1982 sub parse_difftree_raw_line {
1983         my $line = shift;
1984         my %res;
1985
1986         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1987         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1988         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1989                 $res{'from_mode'} = $1;
1990                 $res{'to_mode'} = $2;
1991                 $res{'from_id'} = $3;
1992                 $res{'to_id'} = $4;
1993                 $res{'status'} = $5;
1994                 $res{'similarity'} = $6;
1995                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1996                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1997                 } else {
1998                         $res{'file'} = unquote($7);
1999                 }
2000         }
2001         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2002         # combined diff (for merge commit)
2003         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2004                 $res{'nparents'}  = length($1);
2005                 $res{'from_mode'} = [ split(' ', $2) ];
2006                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2007                 $res{'from_id'} = [ split(' ', $3) ];
2008                 $res{'to_id'} = pop @{$res{'from_id'}};
2009                 $res{'status'} = [ split('', $4) ];
2010                 $res{'to_file'} = unquote($5);
2011         }
2012         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2013         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2014                 $res{'commit'} = $1;
2015         }
2016
2017         return wantarray ? %res : \%res;
2018 }
2019
2020 # wrapper: return parsed line of git-diff-tree "raw" output
2021 # (the argument might be raw line, or parsed info)
2022 sub parsed_difftree_line {
2023         my $line_or_ref = shift;
2024
2025         if (ref($line_or_ref) eq "HASH") {
2026                 # pre-parsed (or generated by hand)
2027                 return $line_or_ref;
2028         } else {
2029                 return parse_difftree_raw_line($line_or_ref);
2030         }
2031 }
2032
2033 # parse line of git-ls-tree output
2034 sub parse_ls_tree_line ($;%) {
2035         my $line = shift;
2036         my %opts = @_;
2037         my %res;
2038
2039         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2040         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2041
2042         $res{'mode'} = $1;
2043         $res{'type'} = $2;
2044         $res{'hash'} = $3;
2045         if ($opts{'-z'}) {
2046                 $res{'name'} = $4;
2047         } else {
2048                 $res{'name'} = unquote($4);
2049         }
2050
2051         return wantarray ? %res : \%res;
2052 }
2053
2054 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2055 sub parse_from_to_diffinfo {
2056         my ($diffinfo, $from, $to, @parents) = @_;
2057
2058         if ($diffinfo->{'nparents'}) {
2059                 # combined diff
2060                 $from->{'file'} = [];
2061                 $from->{'href'} = [];
2062                 fill_from_file_info($diffinfo, @parents)
2063                         unless exists $diffinfo->{'from_file'};
2064                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2065                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2066                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2067                                 $from->{'href'}[$i] = href(action=>"blob",
2068                                                            hash_base=>$parents[$i],
2069                                                            hash=>$diffinfo->{'from_id'}[$i],
2070                                                            file_name=>$from->{'file'}[$i]);
2071                         } else {
2072                                 $from->{'href'}[$i] = undef;
2073                         }
2074                 }
2075         } else {
2076                 # ordinary (not combined) diff
2077                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2078                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2079                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2080                                                hash=>$diffinfo->{'from_id'},
2081                                                file_name=>$from->{'file'});
2082                 } else {
2083                         delete $from->{'href'};
2084                 }
2085         }
2086
2087         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2088         if (!is_deleted($diffinfo)) { # file exists in result
2089                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2090                                      hash=>$diffinfo->{'to_id'},
2091                                      file_name=>$to->{'file'});
2092         } else {
2093                 delete $to->{'href'};
2094         }
2095 }
2096
2097 ## ......................................................................
2098 ## parse to array of hashes functions
2099
2100 sub git_get_heads_list {
2101         my $limit = shift;
2102         my @headslist;
2103
2104         open my $fd, '-|', git_cmd(), 'for-each-ref',
2105                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2106                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2107                 'refs/heads'
2108                 or return;
2109         while (my $line = <$fd>) {
2110                 my %ref_item;
2111
2112                 chomp $line;
2113                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2114                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2115                 my ($committer, $epoch, $tz) =
2116                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2117                 $name =~ s!^refs/heads/!!;
2118
2119                 $ref_item{'name'}  = $name;
2120                 $ref_item{'id'}    = $hash;
2121                 $ref_item{'title'} = $title || '(no commit message)';
2122                 $ref_item{'epoch'} = $epoch;
2123                 if ($epoch) {
2124                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2125                 } else {
2126                         $ref_item{'age'} = "unknown";
2127                 }
2128
2129                 push @headslist, \%ref_item;
2130         }
2131         close $fd;
2132
2133         return wantarray ? @headslist : \@headslist;
2134 }
2135
2136 sub git_get_tags_list {
2137         my $limit = shift;
2138         my @tagslist;
2139
2140         open my $fd, '-|', git_cmd(), 'for-each-ref',
2141                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2142                 '--format=%(objectname) %(objecttype) %(refname) '.
2143                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2144                 'refs/tags'
2145                 or return;
2146         while (my $line = <$fd>) {
2147                 my %ref_item;
2148
2149                 chomp $line;
2150                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2151                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2152                 my ($creator, $epoch, $tz) =
2153                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2154                 $name =~ s!^refs/tags/!!;
2155
2156                 $ref_item{'type'} = $type;
2157                 $ref_item{'id'} = $id;
2158                 $ref_item{'name'} = $name;
2159                 if ($type eq "tag") {
2160                         $ref_item{'subject'} = $title;
2161                         $ref_item{'reftype'} = $reftype;
2162                         $ref_item{'refid'}   = $refid;
2163                 } else {
2164                         $ref_item{'reftype'} = $type;
2165                         $ref_item{'refid'}   = $id;
2166                 }
2167
2168                 if ($type eq "tag" || $type eq "commit") {
2169                         $ref_item{'epoch'} = $epoch;
2170                         if ($epoch) {
2171                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2172                         } else {
2173                                 $ref_item{'age'} = "unknown";
2174                         }
2175                 }
2176
2177                 push @tagslist, \%ref_item;
2178         }
2179         close $fd;
2180
2181         return wantarray ? @tagslist : \@tagslist;
2182 }
2183
2184 ## ----------------------------------------------------------------------
2185 ## filesystem-related functions
2186
2187 sub get_file_owner {
2188         my $path = shift;
2189
2190         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2191         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2192         if (!defined $gcos) {
2193                 return undef;
2194         }
2195         my $owner = $gcos;
2196         $owner =~ s/[,;].*$//;
2197         return to_utf8($owner);
2198 }
2199
2200 ## ......................................................................
2201 ## mimetype related functions
2202
2203 sub mimetype_guess_file {
2204         my $filename = shift;
2205         my $mimemap = shift;
2206         -r $mimemap or return undef;
2207
2208         my %mimemap;
2209         open(MIME, $mimemap) or return undef;
2210         while (<MIME>) {
2211                 next if m/^#/; # skip comments
2212                 my ($mime, $exts) = split(/\t+/);
2213                 if (defined $exts) {
2214                         my @exts = split(/\s+/, $exts);
2215                         foreach my $ext (@exts) {
2216                                 $mimemap{$ext} = $mime;
2217                         }
2218                 }
2219         }
2220         close(MIME);
2221
2222         $filename =~ /\.([^.]*)$/;
2223         return $mimemap{$1};
2224 }
2225
2226 sub mimetype_guess {
2227         my $filename = shift;
2228         my $mime;
2229         $filename =~ /\./ or return undef;
2230
2231         if ($mimetypes_file) {
2232                 my $file = $mimetypes_file;
2233                 if ($file !~ m!^/!) { # if it is relative path
2234                         # it is relative to project
2235                         $file = "$projectroot/$project/$file";
2236                 }
2237                 $mime = mimetype_guess_file($filename, $file);
2238         }
2239         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2240         return $mime;
2241 }
2242
2243 sub blob_mimetype {
2244         my $fd = shift;
2245         my $filename = shift;
2246
2247         if ($filename) {
2248                 my $mime = mimetype_guess($filename);
2249                 $mime and return $mime;
2250         }
2251
2252         # just in case
2253         return $default_blob_plain_mimetype unless $fd;
2254
2255         if (-T $fd) {
2256                 return 'text/plain' .
2257                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2258         } elsif (! $filename) {
2259                 return 'application/octet-stream';
2260         } elsif ($filename =~ m/\.png$/i) {
2261                 return 'image/png';
2262         } elsif ($filename =~ m/\.gif$/i) {
2263                 return 'image/gif';
2264         } elsif ($filename =~ m/\.jpe?g$/i) {
2265                 return 'image/jpeg';
2266         } else {
2267                 return 'application/octet-stream';
2268         }
2269 }
2270
2271 ## ======================================================================
2272 ## functions printing HTML: header, footer, error page
2273
2274 sub git_header_html {
2275         my $status = shift || "200 OK";
2276         my $expires = shift;
2277
2278         my $title = "$site_name";
2279         if (defined $project) {
2280                 $title .= " - " . to_utf8($project);
2281                 if (defined $action) {
2282                         $title .= "/$action";
2283                         if (defined $file_name) {
2284                                 $title .= " - " . esc_path($file_name);
2285                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2286                                         $title .= "/";
2287                                 }
2288                         }
2289                 }
2290         }
2291         my $content_type;
2292         # require explicit support from the UA if we are to send the page as
2293         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2294         # we have to do this because MSIE sometimes globs '*/*', pretending to
2295         # support xhtml+xml but choking when it gets what it asked for.
2296         if (defined $cgi->http('HTTP_ACCEPT') &&
2297             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2298             $cgi->Accept('application/xhtml+xml') != 0) {
2299                 $content_type = 'application/xhtml+xml';
2300         } else {
2301                 $content_type = 'text/html';
2302         }
2303         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2304                            -status=> $status, -expires => $expires);
2305         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2306         print <<EOF;
2307 <?xml version="1.0" encoding="utf-8"?>
2308 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2309 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2310 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2311 <!-- git core binaries version $git_version -->
2312 <head>
2313 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2314 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2315 <meta name="robots" content="index, nofollow"/>
2316 <title>$title</title>
2317 EOF
2318 # print out each stylesheet that exist
2319         if (defined $stylesheet) {
2320 #provides backwards capability for those people who define style sheet in a config file
2321                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2322         } else {
2323                 foreach my $stylesheet (@stylesheets) {
2324                         next unless $stylesheet;
2325                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2326                 }
2327         }
2328         if (defined $project) {
2329                 printf('<link rel="alternate" title="%s log RSS feed" '.
2330                        'href="%s" type="application/rss+xml" />'."\n",
2331                        esc_param($project), href(action=>"rss"));
2332                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2333                        'href="%s" type="application/rss+xml" />'."\n",
2334                        esc_param($project), href(action=>"rss",
2335                                                  extra_options=>"--no-merges"));
2336                 printf('<link rel="alternate" title="%s log Atom feed" '.
2337                        'href="%s" type="application/atom+xml" />'."\n",
2338                        esc_param($project), href(action=>"atom"));
2339                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2340                        'href="%s" type="application/atom+xml" />'."\n",
2341                        esc_param($project), href(action=>"atom",
2342                                                  extra_options=>"--no-merges"));
2343         } else {
2344                 printf('<link rel="alternate" title="%s projects list" '.
2345                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2346                        $site_name, href(project=>undef, action=>"project_index"));
2347                 printf('<link rel="alternate" title="%s projects feeds" '.
2348                        'href="%s" type="text/x-opml"/>'."\n",
2349                        $site_name, href(project=>undef, action=>"opml"));
2350         }
2351         if (defined $favicon) {
2352                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2353         }
2354
2355         print "</head>\n" .
2356               "<body>\n";
2357
2358         if (-f $site_header) {
2359                 open (my $fd, $site_header);
2360                 print <$fd>;
2361                 close $fd;
2362         }
2363
2364         print "<div class=\"page_header\">\n" .
2365               $cgi->a({-href => esc_url($logo_url),
2366                        -title => $logo_label},
2367                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2368         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2369         if (defined $project) {
2370                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2371                 if (defined $action) {
2372                         print " / $action";
2373                 }
2374                 print "\n";
2375         }
2376         print "</div>\n";
2377
2378         my ($have_search) = gitweb_check_feature('search');
2379         if ((defined $project) && ($have_search)) {
2380                 if (!defined $searchtext) {
2381                         $searchtext = "";
2382                 }
2383                 my $search_hash;
2384                 if (defined $hash_base) {
2385                         $search_hash = $hash_base;
2386                 } elsif (defined $hash) {
2387                         $search_hash = $hash;
2388                 } else {
2389                         $search_hash = "HEAD";
2390                 }
2391                 my $action = $my_uri;
2392                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2393                 if ($use_pathinfo) {
2394                         $action .= "/$project";
2395                 } else {
2396                         $cgi->param("p", $project);
2397                 }
2398                 $cgi->param("a", "search");
2399                 $cgi->param("h", $search_hash);
2400                 print $cgi->startform(-method => "get", -action => $action) .
2401                       "<div class=\"search\">\n" .
2402                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2403                       $cgi->hidden(-name => "a") . "\n" .
2404                       $cgi->hidden(-name => "h") . "\n" .
2405                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2406                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2407                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2408                       " search:\n",
2409                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2410                       "</div>" .
2411                       $cgi->end_form() . "\n";
2412         }
2413 }
2414
2415 sub git_footer_html {
2416         print "<div class=\"page_footer\">\n";
2417         if (defined $project) {
2418                 my $descr = git_get_project_description($project);
2419                 if (defined $descr) {
2420                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2421                 }
2422                 print $cgi->a({-href => href(action=>"rss"),
2423                               -class => "rss_logo"}, "RSS") . " ";
2424                 print $cgi->a({-href => href(action=>"atom"),
2425                               -class => "rss_logo"}, "Atom") . "\n";
2426         } else {
2427                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2428                               -class => "rss_logo"}, "OPML") . " ";
2429                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2430                               -class => "rss_logo"}, "TXT") . "\n";
2431         }
2432         print "</div>\n" ;
2433
2434         if (-f $site_footer) {
2435                 open (my $fd, $site_footer);
2436                 print <$fd>;
2437                 close $fd;
2438         }
2439
2440         print "</body>\n" .
2441               "</html>";
2442 }
2443
2444 sub die_error {
2445         my $status = shift || "403 Forbidden";
2446         my $error = shift || "Malformed query, file missing or permission denied";
2447
2448         git_header_html($status);
2449         print <<EOF;
2450 <div class="page_body">
2451 <br /><br />
2452 $status - $error
2453 <br />
2454 </div>
2455 EOF
2456         git_footer_html();
2457         exit;
2458 }
2459
2460 ## ----------------------------------------------------------------------
2461 ## functions printing or outputting HTML: navigation
2462
2463 sub git_print_page_nav {
2464         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2465         $extra = '' if !defined $extra; # pager or formats
2466
2467         my @navs = qw(summary shortlog log commit commitdiff tree);
2468         if ($suppress) {
2469                 @navs = grep { $_ ne $suppress } @navs;
2470         }
2471
2472         my %arg = map { $_ => {action=>$_} } @navs;
2473         if (defined $head) {
2474                 for (qw(commit commitdiff)) {
2475                         $arg{$_}{'hash'} = $head;
2476                 }
2477                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2478                         for (qw(shortlog log)) {
2479                                 $arg{$_}{'hash'} = $head;
2480                         }
2481                 }
2482         }
2483         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2484         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2485
2486         print "<div class=\"page_nav\">\n" .
2487                 (join " | ",
2488                  map { $_ eq $current ?
2489                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2490                  } @navs);
2491         print "<br/>\n$extra<br/>\n" .
2492               "</div>\n";
2493 }
2494
2495 sub format_paging_nav {
2496         my ($action, $hash, $head, $page, $nrevs) = @_;
2497         my $paging_nav;
2498
2499
2500         if ($hash ne $head || $page) {
2501                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2502         } else {
2503                 $paging_nav .= "HEAD";
2504         }
2505
2506         if ($page > 0) {
2507                 $paging_nav .= " &sdot; " .
2508                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2509                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2510         } else {
2511                 $paging_nav .= " &sdot; prev";
2512         }
2513
2514         if ($nrevs >= (100 * ($page+1)-1)) {
2515                 $paging_nav .= " &sdot; " .
2516                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2517                                  -accesskey => "n", -title => "Alt-n"}, "next");
2518         } else {
2519                 $paging_nav .= " &sdot; next";
2520         }
2521
2522         return $paging_nav;
2523 }
2524
2525 ## ......................................................................
2526 ## functions printing or outputting HTML: div
2527
2528 sub git_print_header_div {
2529         my ($action, $title, $hash, $hash_base) = @_;
2530         my %args = ();
2531
2532         $args{'action'} = $action;
2533         $args{'hash'} = $hash if $hash;
2534         $args{'hash_base'} = $hash_base if $hash_base;
2535
2536         print "<div class=\"header\">\n" .
2537               $cgi->a({-href => href(%args), -class => "title"},
2538               $title ? $title : $action) .
2539               "\n</div>\n";
2540 }
2541
2542 #sub git_print_authorship (\%) {
2543 sub git_print_authorship {
2544         my $co = shift;
2545
2546         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2547         print "<div class=\"author_date\">" .
2548               esc_html($co->{'author_name'}) .
2549               " [$ad{'rfc2822'}";
2550         if ($ad{'hour_local'} < 6) {
2551                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2552                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2553         } else {
2554                 printf(" (%02d:%02d %s)",
2555                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2556         }
2557         print "]</div>\n";
2558 }
2559
2560 sub git_print_page_path {
2561         my $name = shift;
2562         my $type = shift;
2563         my $hb = shift;
2564
2565
2566         print "<div class=\"page_path\">";
2567         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2568                       -title => 'tree root'}, to_utf8("[$project]"));
2569         print " / ";
2570         if (defined $name) {
2571                 my @dirname = split '/', $name;
2572                 my $basename = pop @dirname;
2573                 my $fullname = '';
2574
2575                 foreach my $dir (@dirname) {
2576                         $fullname .= ($fullname ? '/' : '') . $dir;
2577                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2578                                                      hash_base=>$hb),
2579                                       -title => $fullname}, esc_path($dir));
2580                         print " / ";
2581                 }
2582                 if (defined $type && $type eq 'blob') {
2583                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2584                                                      hash_base=>$hb),
2585                                       -title => $name}, esc_path($basename));
2586                 } elsif (defined $type && $type eq 'tree') {
2587                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2588                                                      hash_base=>$hb),
2589                                       -title => $name}, esc_path($basename));
2590                         print " / ";
2591                 } else {
2592                         print esc_path($basename);
2593                 }
2594         }
2595         print "<br/></div>\n";
2596 }
2597
2598 # sub git_print_log (\@;%) {
2599 sub git_print_log ($;%) {
2600         my $log = shift;
2601         my %opts = @_;
2602
2603         if ($opts{'-remove_title'}) {
2604                 # remove title, i.e. first line of log
2605                 shift @$log;
2606         }
2607         # remove leading empty lines
2608         while (defined $log->[0] && $log->[0] eq "") {
2609                 shift @$log;
2610         }
2611
2612         # print log
2613         my $signoff = 0;
2614         my $empty = 0;
2615         foreach my $line (@$log) {
2616                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2617                         $signoff = 1;
2618                         $empty = 0;
2619                         if (! $opts{'-remove_signoff'}) {
2620                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2621                                 next;
2622                         } else {
2623                                 # remove signoff lines
2624                                 next;
2625                         }
2626                 } else {
2627                         $signoff = 0;
2628                 }
2629
2630                 # print only one empty line
2631                 # do not print empty line after signoff
2632                 if ($line eq "") {
2633                         next if ($empty || $signoff);
2634                         $empty = 1;
2635                 } else {
2636                         $empty = 0;
2637                 }
2638
2639                 print format_log_line_html($line) . "<br/>\n";
2640         }
2641
2642         if ($opts{'-final_empty_line'}) {
2643                 # end with single empty line
2644                 print "<br/>\n" unless $empty;
2645         }
2646 }
2647
2648 # return link target (what link points to)
2649 sub git_get_link_target {
2650         my $hash = shift;
2651         my $link_target;
2652
2653         # read link
2654         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2655                 or return;
2656         {
2657                 local $/;
2658                 $link_target = <$fd>;
2659         }
2660         close $fd
2661                 or return;
2662
2663         return $link_target;
2664 }
2665
2666 # given link target, and the directory (basedir) the link is in,
2667 # return target of link relative to top directory (top tree);
2668 # return undef if it is not possible (including absolute links).
2669 sub normalize_link_target {
2670         my ($link_target, $basedir, $hash_base) = @_;
2671
2672         # we can normalize symlink target only if $hash_base is provided
2673         return unless $hash_base;
2674
2675         # absolute symlinks (beginning with '/') cannot be normalized
2676         return if (substr($link_target, 0, 1) eq '/');
2677
2678         # normalize link target to path from top (root) tree (dir)
2679         my $path;
2680         if ($basedir) {
2681                 $path = $basedir . '/' . $link_target;
2682         } else {
2683                 # we are in top (root) tree (dir)
2684                 $path = $link_target;
2685         }
2686
2687         # remove //, /./, and /../
2688         my @path_parts;
2689         foreach my $part (split('/', $path)) {
2690                 # discard '.' and ''
2691                 next if (!$part || $part eq '.');
2692                 # handle '..'
2693                 if ($part eq '..') {
2694                         if (@path_parts) {
2695                                 pop @path_parts;
2696                         } else {
2697                                 # link leads outside repository (outside top dir)
2698                                 return;
2699                         }
2700                 } else {
2701                         push @path_parts, $part;
2702                 }
2703         }
2704         $path = join('/', @path_parts);
2705
2706         return $path;
2707 }
2708
2709 # print tree entry (row of git_tree), but without encompassing <tr> element
2710 sub git_print_tree_entry {
2711         my ($t, $basedir, $hash_base, $have_blame) = @_;
2712
2713         my %base_key = ();
2714         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2715
2716         # The format of a table row is: mode list link.  Where mode is
2717         # the mode of the entry, list is the name of the entry, an href,
2718         # and link is the action links of the entry.
2719
2720         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2721         if ($t->{'type'} eq "blob") {
2722                 print "<td class=\"list\">" .
2723                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2724                                                file_name=>"$basedir$t->{'name'}", %base_key),
2725                                 -class => "list"}, esc_path($t->{'name'}));
2726                 if (S_ISLNK(oct $t->{'mode'})) {
2727                         my $link_target = git_get_link_target($t->{'hash'});
2728                         if ($link_target) {
2729                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2730                                 if (defined $norm_target) {
2731                                         print " -> " .
2732                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2733                                                                      file_name=>$norm_target),
2734                                                        -title => $norm_target}, esc_path($link_target));
2735                                 } else {
2736                                         print " -> " . esc_path($link_target);
2737                                 }
2738                         }
2739                 }
2740                 print "</td>\n";
2741                 print "<td class=\"link\">";
2742                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2743                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2744                               "blob");
2745                 if ($have_blame) {
2746                         print " | " .
2747                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2748                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2749                                       "blame");
2750                 }
2751                 if (defined $hash_base) {
2752                         print " | " .
2753                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2754                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2755                                       "history");
2756                 }
2757                 print " | " .
2758                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2759                                                file_name=>"$basedir$t->{'name'}")},
2760                                 "raw");
2761                 print "</td>\n";
2762
2763         } elsif ($t->{'type'} eq "tree") {
2764                 print "<td class=\"list\">";
2765                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2766                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2767                               esc_path($t->{'name'}));
2768                 print "</td>\n";
2769                 print "<td class=\"link\">";
2770                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2771                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2772                               "tree");
2773                 if (defined $hash_base) {
2774                         print " | " .
2775                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2776                                                      file_name=>"$basedir$t->{'name'}")},
2777                                       "history");
2778                 }
2779                 print "</td>\n";
2780         } else {
2781                 # unknown object: we can only present history for it
2782                 # (this includes 'commit' object, i.e. submodule support)
2783                 print "<td class=\"list\">" .
2784                       esc_path($t->{'name'}) .
2785                       "</td>\n";
2786                 print "<td class=\"link\">";
2787                 if (defined $hash_base) {
2788                         print $cgi->a({-href => href(action=>"history",
2789                                                      hash_base=>$hash_base,
2790                                                      file_name=>"$basedir$t->{'name'}")},
2791                                       "history");
2792                 }
2793                 print "</td>\n";
2794         }
2795 }
2796
2797 ## ......................................................................
2798 ## functions printing large fragments of HTML
2799
2800 # get pre-image filenames for merge (combined) diff
2801 sub fill_from_file_info {
2802         my ($diff, @parents) = @_;
2803
2804         $diff->{'from_file'} = [ ];
2805         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2806         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2807                 if ($diff->{'status'}[$i] eq 'R' ||
2808                     $diff->{'status'}[$i] eq 'C') {
2809                         $diff->{'from_file'}[$i] =
2810                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2811                 }
2812         }
2813
2814         return $diff;
2815 }
2816
2817 # is current raw difftree line of file deletion
2818 sub is_deleted {
2819         my $diffinfo = shift;
2820
2821         return $diffinfo->{'to_id'} eq ('0' x 40);
2822 }
2823
2824 # does patch correspond to [previous] difftree raw line
2825 # $diffinfo  - hashref of parsed raw diff format
2826 # $patchinfo - hashref of parsed patch diff format
2827 #              (the same keys as in $diffinfo)
2828 sub is_patch_split {
2829         my ($diffinfo, $patchinfo) = @_;
2830
2831         return defined $diffinfo && defined $patchinfo
2832                 && ($diffinfo->{'to_file'} || $diffinfo->{'file'}) eq $patchinfo->{'to_file'};
2833 }
2834
2835
2836 sub git_difftree_body {
2837         my ($difftree, $hash, @parents) = @_;
2838         my ($parent) = $parents[0];
2839         my ($have_blame) = gitweb_check_feature('blame');
2840         print "<div class=\"list_head\">\n";
2841         if ($#{$difftree} > 10) {
2842                 print(($#{$difftree} + 1) . " files changed:\n");
2843         }
2844         print "</div>\n";
2845
2846         print "<table class=\"" .
2847               (@parents > 1 ? "combined " : "") .
2848               "diff_tree\">\n";
2849
2850         # header only for combined diff in 'commitdiff' view
2851         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2852         if ($has_header) {
2853                 # table header
2854                 print "<thead><tr>\n" .
2855                        "<th></th><th></th>\n"; # filename, patchN link
2856                 for (my $i = 0; $i < @parents; $i++) {
2857                         my $par = $parents[$i];
2858                         print "<th>" .
2859                               $cgi->a({-href => href(action=>"commitdiff",
2860                                                      hash=>$hash, hash_parent=>$par),
2861                                        -title => 'commitdiff to parent number ' .
2862                                                   ($i+1) . ': ' . substr($par,0,7)},
2863                                       $i+1) .
2864                               "&nbsp;</th>\n";
2865                 }
2866                 print "</tr></thead>\n<tbody>\n";
2867         }
2868
2869         my $alternate = 1;
2870         my $patchno = 0;
2871         foreach my $line (@{$difftree}) {
2872                 my $diff = parsed_difftree_line($line);
2873
2874                 if ($alternate) {
2875                         print "<tr class=\"dark\">\n";
2876                 } else {
2877                         print "<tr class=\"light\">\n";
2878                 }
2879                 $alternate ^= 1;
2880
2881                 if (exists $diff->{'nparents'}) { # combined diff
2882
2883                         fill_from_file_info($diff, @parents)
2884                                 unless exists $diff->{'from_file'};
2885
2886                         if (!is_deleted($diff)) {
2887                                 # file exists in the result (child) commit
2888                                 print "<td>" .
2889                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2890                                                              file_name=>$diff->{'to_file'},
2891                                                              hash_base=>$hash),
2892                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2893                                       "</td>\n";
2894                         } else {
2895                                 print "<td>" .
2896                                       esc_path($diff->{'to_file'}) .
2897                                       "</td>\n";
2898                         }
2899
2900                         if ($action eq 'commitdiff') {
2901                                 # link to patch
2902                                 $patchno++;
2903                                 print "<td class=\"link\">" .
2904                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2905                                       " | " .
2906                                       "</td>\n";
2907                         }
2908
2909                         my $has_history = 0;
2910                         my $not_deleted = 0;
2911                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2912                                 my $hash_parent = $parents[$i];
2913                                 my $from_hash = $diff->{'from_id'}[$i];
2914                                 my $from_path = $diff->{'from_file'}[$i];
2915                                 my $status = $diff->{'status'}[$i];
2916
2917                                 $has_history ||= ($status ne 'A');
2918                                 $not_deleted ||= ($status ne 'D');
2919
2920                                 if ($status eq 'A') {
2921                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2922                                 } elsif ($status eq 'D') {
2923                                         print "<td class=\"link\">" .
2924                                               $cgi->a({-href => href(action=>"blob",
2925                                                                      hash_base=>$hash,
2926                                                                      hash=>$from_hash,
2927                                                                      file_name=>$from_path)},
2928                                                       "blob" . ($i+1)) .
2929                                               " | </td>\n";
2930                                 } else {
2931                                         if ($diff->{'to_id'} eq $from_hash) {
2932                                                 print "<td class=\"link nochange\">";
2933                                         } else {
2934                                                 print "<td class=\"link\">";
2935                                         }
2936                                         print $cgi->a({-href => href(action=>"blobdiff",
2937                                                                      hash=>$diff->{'to_id'},
2938                                                                      hash_parent=>$from_hash,
2939                                                                      hash_base=>$hash,
2940                                                                      hash_parent_base=>$hash_parent,
2941                                                                      file_name=>$diff->{'to_file'},
2942                                                                      file_parent=>$from_path)},
2943                                                       "diff" . ($i+1)) .
2944                                               " | </td>\n";
2945                                 }
2946                         }
2947
2948                         print "<td class=\"link\">";
2949                         if ($not_deleted) {
2950                                 print $cgi->a({-href => href(action=>"blob",
2951                                                              hash=>$diff->{'to_id'},
2952                                                              file_name=>$diff->{'to_file'},
2953                                                              hash_base=>$hash)},
2954                                               "blob");
2955                                 print " | " if ($has_history);
2956                         }
2957                         if ($has_history) {
2958                                 print $cgi->a({-href => href(action=>"history",
2959                                                              file_name=>$diff->{'to_file'},
2960                                                              hash_base=>$hash)},
2961                                               "history");
2962                         }
2963                         print "</td>\n";
2964
2965                         print "</tr>\n";
2966                         next; # instead of 'else' clause, to avoid extra indent
2967                 }
2968                 # else ordinary diff
2969
2970                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2971                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2972                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2973                         $to_mode_oct = oct $diff->{'to_mode'};
2974                         if (S_ISREG($to_mode_oct)) { # only for regular file
2975                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2976                         }
2977                         $to_file_type = file_type($diff->{'to_mode'});
2978                 }
2979                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2980                         $from_mode_oct = oct $diff->{'from_mode'};
2981                         if (S_ISREG($to_mode_oct)) { # only for regular file
2982                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2983                         }
2984                         $from_file_type = file_type($diff->{'from_mode'});
2985                 }
2986
2987                 if ($diff->{'status'} eq "A") { # created
2988                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2989                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2990                         $mode_chng   .= "]</span>";
2991                         print "<td>";
2992                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2993                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2994                                       -class => "list"}, esc_path($diff->{'file'}));
2995                         print "</td>\n";
2996                         print "<td>$mode_chng</td>\n";
2997                         print "<td class=\"link\">";
2998                         if ($action eq 'commitdiff') {
2999                                 # link to patch
3000                                 $patchno++;
3001                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3002                                 print " | ";
3003                         }
3004                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3005                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3006                                       "blob");
3007                         print "</td>\n";
3008
3009                 } elsif ($diff->{'status'} eq "D") { # deleted
3010                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3011                         print "<td>";
3012                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3013                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3014                                        -class => "list"}, esc_path($diff->{'file'}));
3015                         print "</td>\n";
3016                         print "<td>$mode_chng</td>\n";
3017                         print "<td class=\"link\">";
3018                         if ($action eq 'commitdiff') {
3019                                 # link to patch
3020                                 $patchno++;
3021                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3022                                 print " | ";
3023                         }
3024                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3025                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3026                                       "blob") . " | ";
3027                         if ($have_blame) {
3028                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3029                                                              file_name=>$diff->{'file'})},
3030                                               "blame") . " | ";
3031                         }
3032                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3033                                                      file_name=>$diff->{'file'})},
3034                                       "history");
3035                         print "</td>\n";
3036
3037                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3038                         my $mode_chnge = "";
3039                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3040                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3041                                 if ($from_file_type ne $to_file_type) {
3042                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3043                                 }
3044                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3045                                         if ($from_mode_str && $to_mode_str) {
3046                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3047                                         } elsif ($to_mode_str) {
3048                                                 $mode_chnge .= " mode: $to_mode_str";
3049                                         }
3050                                 }
3051                                 $mode_chnge .= "]</span>\n";
3052                         }
3053                         print "<td>";
3054                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3055                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3056                                       -class => "list"}, esc_path($diff->{'file'}));
3057                         print "</td>\n";
3058                         print "<td>$mode_chnge</td>\n";
3059                         print "<td class=\"link\">";
3060                         if ($action eq 'commitdiff') {
3061                                 # link to patch
3062                                 $patchno++;
3063                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3064                                       " | ";
3065                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3066                                 # "commit" view and modified file (not onlu mode changed)
3067                                 print $cgi->a({-href => href(action=>"blobdiff",
3068                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3069                                                              hash_base=>$hash, hash_parent_base=>$parent,
3070                                                              file_name=>$diff->{'file'})},
3071                                               "diff") .
3072                                       " | ";
3073                         }
3074                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3075                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3076                                        "blob") . " | ";
3077                         if ($have_blame) {
3078                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3079                                                              file_name=>$diff->{'file'})},
3080                                               "blame") . " | ";
3081                         }
3082                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3083                                                      file_name=>$diff->{'file'})},
3084                                       "history");
3085                         print "</td>\n";
3086
3087                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3088                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3089                         my $nstatus = $status_name{$diff->{'status'}};
3090                         my $mode_chng = "";
3091                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3092                                 # mode also for directories, so we cannot use $to_mode_str
3093                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3094                         }
3095                         print "<td>" .
3096                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3097                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3098                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3099                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3100                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3101                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3102                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3103                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3104                               "<td class=\"link\">";
3105                         if ($action eq 'commitdiff') {
3106                                 # link to patch
3107                                 $patchno++;
3108                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3109                                       " | ";
3110                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3111                                 # "commit" view and modified file (not only pure rename or copy)
3112                                 print $cgi->a({-href => href(action=>"blobdiff",
3113                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3114                                                              hash_base=>$hash, hash_parent_base=>$parent,
3115                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3116                                               "diff") .
3117                                       " | ";
3118                         }
3119                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3120                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3121                                       "blob") . " | ";
3122                         if ($have_blame) {
3123                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3124                                                              file_name=>$diff->{'to_file'})},
3125                                               "blame") . " | ";
3126                         }
3127                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3128                                                     file_name=>$diff->{'to_file'})},
3129                                       "history");
3130                         print "</td>\n";
3131
3132                 } # we should not encounter Unmerged (U) or Unknown (X) status
3133                 print "</tr>\n";
3134         }
3135         print "</tbody>" if $has_header;
3136         print "</table>\n";
3137 }
3138
3139 sub git_patchset_body {
3140         my ($fd, $difftree, $hash, @hash_parents) = @_;
3141         my ($hash_parent) = $hash_parents[0];
3142
3143         my $is_combined = (@hash_parents > 1);
3144         my $patch_idx = 0;
3145         my $patch_number = 0;
3146         my $patch_line;
3147         my $diffinfo;
3148         my $to_name;
3149         my (%from, %to);
3150
3151         print "<div class=\"patchset\">\n";
3152
3153         # skip to first patch
3154         while ($patch_line = <$fd>) {
3155                 chomp $patch_line;
3156
3157                 last if ($patch_line =~ m/^diff /);
3158         }
3159
3160  PATCH:
3161         while ($patch_line) {
3162
3163                 # parse "git diff" header line
3164                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3165                         # $1 is from_name, which we do not use
3166                         $to_name = unquote($2);
3167                         $to_name =~ s!^b/!!;
3168                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3169                         # $1 is 'cc' or 'combined', which we do not use
3170                         $to_name = unquote($2);
3171                 } else {
3172                         $to_name = undef;
3173                 }
3174
3175                 # check if current patch belong to current raw line
3176                 # and parse raw git-diff line if needed
3177                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3178                         # this is continuation of a split patch
3179                         print "<div class=\"patch cont\">\n";
3180                 } else {
3181                         # advance raw git-diff output if needed
3182                         $patch_idx++ if defined $diffinfo;
3183
3184                         # read and prepare patch information
3185                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3186
3187                         # compact combined diff output can have some patches skipped
3188                         # find which patch (using pathname of result) we are at now;
3189                         if ($is_combined) {
3190                                 while ($to_name ne $diffinfo->{'to_file'}) {
3191                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3192                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3193                                               "</div>\n";  # class="patch"
3194
3195                                         $patch_idx++;
3196                                         $patch_number++;
3197
3198                                         last if $patch_idx > $#$difftree;
3199                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3200                                 }
3201                         }
3202
3203                         # modifies %from, %to hashes
3204                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3205
3206                         # this is first patch for raw difftree line with $patch_idx index
3207                         # we index @$difftree array from 0, but number patches from 1
3208                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3209                 }
3210
3211                 # git diff header
3212                 #assert($patch_line =~ m/^diff /) if DEBUG;
3213                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3214                 $patch_number++;
3215                 # print "git diff" header
3216                 print format_git_diff_header_line($patch_line, $diffinfo,
3217                                                   \%from, \%to);
3218
3219                 # print extended diff header
3220                 print "<div class=\"diff extended_header\">\n";
3221         EXTENDED_HEADER:
3222                 while ($patch_line = <$fd>) {
3223                         chomp $patch_line;
3224
3225                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3226
3227                         print format_extended_diff_header_line($patch_line, $diffinfo,
3228                                                                \%from, \%to);
3229                 }
3230                 print "</div>\n"; # class="diff extended_header"
3231
3232                 # from-file/to-file diff header
3233                 if (! $patch_line) {
3234                         print "</div>\n"; # class="patch"
3235                         last PATCH;
3236                 }
3237                 next PATCH if ($patch_line =~ m/^diff /);
3238                 #assert($patch_line =~ m/^---/) if DEBUG;
3239
3240                 my $last_patch_line = $patch_line;
3241                 $patch_line = <$fd>;
3242                 chomp $patch_line;
3243                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3244
3245                 print format_diff_from_to_header($last_patch_line, $patch_line,
3246                                                  $diffinfo, \%from, \%to,
3247                                                  @hash_parents);
3248
3249                 # the patch itself
3250         LINE:
3251                 while ($patch_line = <$fd>) {
3252                         chomp $patch_line;
3253
3254                         next PATCH if ($patch_line =~ m/^diff /);
3255
3256                         print format_diff_line($patch_line, \%from, \%to);
3257                 }
3258
3259         } continue {
3260                 print "</div>\n"; # class="patch"
3261         }
3262
3263         # for compact combined (--cc) format, with chunk and patch simpliciaction
3264         # patchset might be empty, but there might be unprocessed raw lines
3265         for (++$patch_idx if $patch_number > 0;
3266              $patch_idx < @$difftree;
3267              ++$patch_idx) {
3268                 # read and prepare patch information
3269                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3270
3271                 # generate anchor for "patch" links in difftree / whatchanged part
3272                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3273                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3274                       "</div>\n";  # class="patch"
3275
3276                 $patch_number++;
3277         }
3278
3279         if ($patch_number == 0) {
3280                 if (@hash_parents > 1) {
3281                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3282                 } else {
3283                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3284                 }
3285         }
3286
3287         print "</div>\n"; # class="patchset"
3288 }
3289
3290 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3291
3292 sub git_project_list_body {
3293         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3294
3295         my ($check_forks) = gitweb_check_feature('forks');
3296
3297         my @projects;
3298         foreach my $pr (@$projlist) {
3299                 my (@aa) = git_get_last_activity($pr->{'path'});
3300                 unless (@aa) {
3301                         next;
3302                 }
3303                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3304                 if (!defined $pr->{'descr'}) {
3305                         my $descr = git_get_project_description($pr->{'path'}) || "";
3306                         $pr->{'descr_long'} = to_utf8($descr);
3307                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3308                 }
3309                 if (!defined $pr->{'owner'}) {
3310                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3311                 }
3312                 if ($check_forks) {
3313                         my $pname = $pr->{'path'};
3314                         if (($pname =~ s/\.git$//) &&
3315                             ($pname !~ /\/$/) &&
3316                             (-d "$projectroot/$pname")) {
3317                                 $pr->{'forks'} = "-d $projectroot/$pname";
3318                         }
3319                         else {
3320                                 $pr->{'forks'} = 0;
3321                         }
3322                 }
3323                 push @projects, $pr;
3324         }
3325
3326         $order ||= $default_projects_order;
3327         $from = 0 unless defined $from;
3328         $to = $#projects if (!defined $to || $#projects < $to);
3329
3330         print "<table class=\"project_list\">\n";
3331         unless ($no_header) {
3332                 print "<tr>\n";
3333                 if ($check_forks) {
3334                         print "<th></th>\n";
3335                 }
3336                 if ($order eq "project") {
3337                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3338                         print "<th>Project</th>\n";
3339                 } else {
3340                         print "<th>" .
3341                               $cgi->a({-href => href(project=>undef, order=>'project'),
3342                                        -class => "header"}, "Project") .
3343                               "</th>\n";
3344                 }
3345                 if ($order eq "descr") {
3346                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3347                         print "<th>Description</th>\n";
3348                 } else {
3349                         print "<th>" .
3350                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3351                                        -class => "header"}, "Description") .
3352                               "</th>\n";
3353                 }
3354                 if ($order eq "owner") {
3355                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3356                         print "<th>Owner</th>\n";
3357                 } else {
3358                         print "<th>" .
3359                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3360                                        -class => "header"}, "Owner") .
3361                               "</th>\n";
3362                 }
3363                 if ($order eq "age") {
3364                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3365                         print "<th>Last Change</th>\n";
3366                 } else {
3367                         print "<th>" .
3368                               $cgi->a({-href => href(project=>undef, order=>'age'),
3369                                        -class => "header"}, "Last Change") .
3370                               "</th>\n";
3371                 }
3372                 print "<th></th>\n" .
3373                       "</tr>\n";
3374         }
3375         my $alternate = 1;
3376         for (my $i = $from; $i <= $to; $i++) {
3377                 my $pr = $projects[$i];
3378                 if ($alternate) {
3379                         print "<tr class=\"dark\">\n";
3380                 } else {
3381                         print "<tr class=\"light\">\n";
3382                 }
3383                 $alternate ^= 1;
3384                 if ($check_forks) {
3385                         print "<td>";
3386                         if ($pr->{'forks'}) {
3387                                 print "<!-- $pr->{'forks'} -->\n";
3388                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3389                         }
3390                         print "</td>\n";
3391                 }
3392                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3393                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3394                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3395                                         -class => "list", -title => $pr->{'descr_long'}},
3396                                         esc_html($pr->{'descr'})) . "</td>\n" .
3397                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3398                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3399                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3400                       "<td class=\"link\">" .
3401                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3402                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3403                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3404                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3405                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3406                       "</td>\n" .
3407                       "</tr>\n";
3408         }
3409         if (defined $extra) {
3410                 print "<tr>\n";
3411                 if ($check_forks) {
3412                         print "<td></td>\n";
3413                 }
3414                 print "<td colspan=\"5\">$extra</td>\n" .
3415                       "</tr>\n";
3416         }
3417         print "</table>\n";
3418 }
3419
3420 sub git_shortlog_body {
3421         # uses global variable $project
3422         my ($commitlist, $from, $to, $refs, $extra) = @_;
3423
3424         $from = 0 unless defined $from;
3425         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3426
3427         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3428         my $alternate = 1;
3429         for (my $i = $from; $i <= $to; $i++) {
3430                 my %co = %{$commitlist->[$i]};
3431                 my $commit = $co{'id'};
3432                 my $ref = format_ref_marker($refs, $commit);
3433                 if ($alternate) {
3434                         print "<tr class=\"dark\">\n";
3435                 } else {
3436                         print "<tr class=\"light\">\n";
3437                 }
3438                 $alternate ^= 1;
3439                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3440                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3441                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3442                       "<td><i>" . $author . "</i></td>\n" .
3443                       "<td>";
3444                 print format_subject_html($co{'title'}, $co{'title_short'},
3445                                           href(action=>"commit", hash=>$commit), $ref);
3446                 print "</td>\n" .
3447                       "<td class=\"link\">" .
3448                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3449                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3450                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3451                 my $snapshot_links = format_snapshot_links($commit);
3452                 if (defined $snapshot_links) {
3453                         print " | " . $snapshot_links;
3454                 }
3455                 print "</td>\n" .
3456                       "</tr>\n";
3457         }
3458         if (defined $extra) {
3459                 print "<tr>\n" .
3460                       "<td colspan=\"4\">$extra</td>\n" .
3461                       "</tr>\n";
3462         }
3463         print "</table>\n";
3464 }
3465
3466 sub git_history_body {
3467         # Warning: assumes constant type (blob or tree) during history
3468         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3469
3470         $from = 0 unless defined $from;
3471         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3472
3473         print "<table class=\"history\" cellspacing=\"0\">\n";
3474         my $alternate = 1;
3475         for (my $i = $from; $i <= $to; $i++) {
3476                 my %co = %{$commitlist->[$i]};
3477                 if (!%co) {
3478                         next;
3479                 }
3480                 my $commit = $co{'id'};
3481
3482                 my $ref = format_ref_marker($refs, $commit);
3483
3484                 if ($alternate) {
3485                         print "<tr class=\"dark\">\n";
3486                 } else {
3487                         print "<tr class=\"light\">\n";
3488                 }
3489                 $alternate ^= 1;
3490         # shortlog uses      chop_str($co{'author_name'}, 10)
3491                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3492                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3493                       "<td><i>" . $author . "</i></td>\n" .
3494                       "<td>";
3495                 # originally git_history used chop_str($co{'title'}, 50)
3496                 print format_subject_html($co{'title'}, $co{'title_short'},
3497                                           href(action=>"commit", hash=>$commit), $ref);
3498                 print "</td>\n" .
3499                       "<td class=\"link\">" .
3500                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3501                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3502
3503                 if ($ftype eq 'blob') {
3504                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3505                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3506                         if (defined $blob_current && defined $blob_parent &&
3507                                         $blob_current ne $blob_parent) {
3508                                 print " | " .
3509                                         $cgi->a({-href => href(action=>"blobdiff",
3510                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3511                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3512                                                                file_name=>$file_name)},
3513                                                 "diff to current");
3514                         }
3515                 }
3516                 print "</td>\n" .
3517                       "</tr>\n";
3518         }
3519         if (defined $extra) {
3520                 print "<tr>\n" .
3521                       "<td colspan=\"4\">$extra</td>\n" .
3522                       "</tr>\n";
3523         }
3524         print "</table>\n";
3525 }
3526
3527 sub git_tags_body {
3528         # uses global variable $project
3529         my ($taglist, $from, $to, $extra) = @_;
3530         $from = 0 unless defined $from;
3531         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3532
3533         print "<table class=\"tags\" cellspacing=\"0\">\n";
3534         my $alternate = 1;
3535         for (my $i = $from; $i <= $to; $i++) {
3536                 my $entry = $taglist->[$i];
3537                 my %tag = %$entry;
3538                 my $comment = $tag{'subject'};
3539                 my $comment_short;
3540                 if (defined $comment) {
3541                         $comment_short = chop_str($comment, 30, 5);
3542                 }
3543                 if ($alternate) {
3544                         print "<tr class=\"dark\">\n";
3545                 } else {
3546                         print "<tr class=\"light\">\n";
3547                 }
3548                 $alternate ^= 1;
3549                 if (defined $tag{'age'}) {
3550                         print "<td><i>$tag{'age'}</i></td>\n";
3551                 } else {
3552                         print "<td></td>\n";
3553                 }
3554                 print "<td>" .
3555                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3556                                -class => "list name"}, esc_html($tag{'name'})) .
3557                       "</td>\n" .
3558                       "<td>";
3559                 if (defined $comment) {
3560                         print format_subject_html($comment, $comment_short,
3561                                                   href(action=>"tag", hash=>$tag{'id'}));
3562                 }
3563                 print "</td>\n" .
3564                       "<td class=\"selflink\">";
3565                 if ($tag{'type'} eq "tag") {
3566                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3567                 } else {
3568                         print "&nbsp;";
3569                 }
3570                 print "</td>\n" .
3571                       "<td class=\"link\">" . " | " .
3572                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3573                 if ($tag{'reftype'} eq "commit") {
3574                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3575                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3576                 } elsif ($tag{'reftype'} eq "blob") {
3577                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3578                 }
3579                 print "</td>\n" .
3580                       "</tr>";
3581         }
3582         if (defined $extra) {
3583                 print "<tr>\n" .
3584                       "<td colspan=\"5\">$extra</td>\n" .
3585                       "</tr>\n";
3586         }
3587         print "</table>\n";
3588 }
3589
3590 sub git_heads_body {
3591         # uses global variable $project
3592         my ($headlist, $head, $from, $to, $extra) = @_;
3593         $from = 0 unless defined $from;
3594         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3595
3596         print "<table class=\"heads\" cellspacing=\"0\">\n";
3597         my $alternate = 1;
3598         for (my $i = $from; $i <= $to; $i++) {
3599                 my $entry = $headlist->[$i];
3600                 my %ref = %$entry;
3601                 my $curr = $ref{'id'} eq $head;
3602                 if ($alternate) {
3603                         print "<tr class=\"dark\">\n";
3604                 } else {
3605                         print "<tr class=\"light\">\n";
3606                 }
3607                 $alternate ^= 1;
3608                 print "<td><i>$ref{'age'}</i></td>\n" .
3609                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3610                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3611                                -class => "list name"},esc_html($ref{'name'})) .
3612                       "</td>\n" .
3613                       "<td class=\"link\">" .
3614                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3615                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3616                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3617                       "</td>\n" .
3618                       "</tr>";
3619         }
3620         if (defined $extra) {
3621                 print "<tr>\n" .
3622                       "<td colspan=\"3\">$extra</td>\n" .
3623                       "</tr>\n";
3624         }
3625         print "</table>\n";
3626 }
3627
3628 sub git_search_grep_body {
3629         my ($commitlist, $from, $to, $extra) = @_;
3630         $from = 0 unless defined $from;
3631         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3632
3633         print "<table class=\"grep\" cellspacing=\"0\">\n";
3634         my $alternate = 1;
3635         for (my $i = $from; $i <= $to; $i++) {
3636                 my %co = %{$commitlist->[$i]};
3637                 if (!%co) {
3638                         next;
3639                 }
3640                 my $commit = $co{'id'};
3641                 if ($alternate) {
3642                         print "<tr class=\"dark\">\n";
3643                 } else {
3644                         print "<tr class=\"light\">\n";
3645                 }
3646                 $alternate ^= 1;
3647                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3648                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3649                       "<td><i>" . $author . "</i></td>\n" .
3650                       "<td>" .
3651                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3652                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3653                 my $comment = $co{'comment'};
3654                 foreach my $line (@$comment) {
3655                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3656                                 my $lead = esc_html($1) || "";
3657                                 $lead = chop_str($lead, 30, 10);
3658                                 my $match = esc_html($2) || "";
3659                                 my $trail = esc_html($3) || "";
3660                                 $trail = chop_str($trail, 30, 10);
3661                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3662                                 print chop_str($text, 80, 5) . "<br/>\n";
3663                         }
3664                 }
3665                 print "</td>\n" .
3666                       "<td class=\"link\">" .
3667                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3668                       " | " .
3669                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3670                 print "</td>\n" .
3671                       "</tr>\n";
3672         }
3673         if (defined $extra) {
3674                 print "<tr>\n" .
3675                       "<td colspan=\"3\">$extra</td>\n" .
3676                       "</tr>\n";
3677         }
3678         print "</table>\n";
3679 }
3680
3681 ## ======================================================================
3682 ## ======================================================================
3683 ## actions
3684
3685 sub git_project_list {
3686         my $order = $cgi->param('o');
3687         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3688                 die_error(undef, "Unknown order parameter");
3689         }
3690
3691         my @list = git_get_projects_list();
3692         if (!@list) {
3693                 die_error(undef, "No projects found");
3694         }
3695
3696         git_header_html();
3697         if (-f $home_text) {
3698                 print "<div class=\"index_include\">\n";
3699                 open (my $fd, $home_text);
3700                 print <$fd>;
3701                 close $fd;
3702                 print "</div>\n";
3703         }
3704         git_project_list_body(\@list, $order);
3705         git_footer_html();
3706 }
3707
3708 sub git_forks {
3709         my $order = $cgi->param('o');
3710         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3711                 die_error(undef, "Unknown order parameter");
3712         }
3713
3714         my @list = git_get_projects_list($project);
3715         if (!@list) {
3716                 die_error(undef, "No forks found");
3717         }
3718
3719         git_header_html();
3720         git_print_page_nav('','');
3721         git_print_header_div('summary', "$project forks");
3722         git_project_list_body(\@list, $order);
3723         git_footer_html();
3724 }
3725
3726 sub git_project_index {
3727         my @projects = git_get_projects_list($project);
3728
3729         print $cgi->header(
3730                 -type => 'text/plain',
3731                 -charset => 'utf-8',
3732                 -content_disposition => 'inline; filename="index.aux"');
3733
3734         foreach my $pr (@projects) {
3735                 if (!exists $pr->{'owner'}) {
3736                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3737                 }
3738
3739                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3740                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3741                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3742                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3743                 $path  =~ s/ /\+/g;
3744                 $owner =~ s/ /\+/g;
3745
3746                 print "$path $owner\n";
3747         }
3748 }
3749
3750 sub git_summary {
3751         my $descr = git_get_project_description($project) || "none";
3752         my %co = parse_commit("HEAD");
3753         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3754         my $head = $co{'id'};
3755
3756         my $owner = git_get_project_owner($project);
3757
3758         my $refs = git_get_references();
3759         # These get_*_list functions return one more to allow us to see if
3760         # there are more ...
3761         my @taglist  = git_get_tags_list(16);
3762         my @headlist = git_get_heads_list(16);
3763         my @forklist;
3764         my ($check_forks) = gitweb_check_feature('forks');
3765
3766         if ($check_forks) {
3767                 @forklist = git_get_projects_list($project);
3768         }
3769
3770         git_header_html();
3771         git_print_page_nav('summary','', $head);
3772
3773         print "<div class=\"title\">&nbsp;</div>\n";
3774         print "<table cellspacing=\"0\">\n" .
3775               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3776               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3777         if (defined $cd{'rfc2822'}) {
3778                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3779         }
3780
3781         # use per project git URL list in $projectroot/$project/cloneurl
3782         # or make project git URL from git base URL and project name
3783         my $url_tag = "URL";
3784         my @url_list = git_get_project_url_list($project);
3785         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3786         foreach my $git_url (@url_list) {
3787                 next unless $git_url;
3788                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3789                 $url_tag = "";
3790         }
3791         print "</table>\n";
3792
3793         if (-s "$projectroot/$project/README.html") {
3794                 if (open my $fd, "$projectroot/$project/README.html") {
3795                         print "<div class=\"title\">readme</div>\n";
3796                         print $_ while (<$fd>);
3797                         close $fd;
3798                 }
3799         }
3800
3801         # we need to request one more than 16 (0..15) to check if
3802         # those 16 are all
3803         my @commitlist = $head ? parse_commits($head, 17) : ();
3804         if (@commitlist) {
3805                 git_print_header_div('shortlog');
3806                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3807                                   $#commitlist <=  15 ? undef :
3808                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3809         }
3810
3811         if (@taglist) {
3812                 git_print_header_div('tags');
3813                 git_tags_body(\@taglist, 0, 15,
3814                               $#taglist <=  15 ? undef :
3815                               $cgi->a({-href => href(action=>"tags")}, "..."));
3816         }
3817
3818         if (@headlist) {
3819                 git_print_header_div('heads');
3820                 git_heads_body(\@headlist, $head, 0, 15,
3821                                $#headlist <= 15 ? undef :
3822                                $cgi->a({-href => href(action=>"heads")}, "..."));
3823         }
3824
3825         if (@forklist) {
3826                 git_print_header_div('forks');
3827                 git_project_list_body(\@forklist, undef, 0, 15,
3828                                       $#forklist <= 15 ? undef :
3829                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3830                                       'noheader');
3831         }
3832
3833         git_footer_html();
3834 }
3835
3836 sub git_tag {
3837         my $head = git_get_head_hash($project);
3838         git_header_html();
3839         git_print_page_nav('','', $head,undef,$head);
3840         my %tag = parse_tag($hash);
3841
3842         if (! %tag) {
3843                 die_error(undef, "Unknown tag object");
3844         }
3845
3846         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3847         print "<div class=\"title_text\">\n" .
3848               "<table cellspacing=\"0\">\n" .
3849               "<tr>\n" .
3850               "<td>object</td>\n" .
3851               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3852                                $tag{'object'}) . "</td>\n" .
3853               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3854                                               $tag{'type'}) . "</td>\n" .
3855               "</tr>\n";
3856         if (defined($tag{'author'})) {
3857                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3858                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3859                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3860                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3861                         "</td></tr>\n";
3862         }
3863         print "</table>\n\n" .
3864               "</div>\n";
3865         print "<div class=\"page_body\">";
3866         my $comment = $tag{'comment'};
3867         foreach my $line (@$comment) {
3868                 chomp $line;
3869                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3870         }
3871         print "</div>\n";
3872         git_footer_html();
3873 }
3874
3875 sub git_blame2 {
3876         my $fd;
3877         my $ftype;
3878
3879         my ($have_blame) = gitweb_check_feature('blame');
3880         if (!$have_blame) {
3881                 die_error('403 Permission denied', "Permission denied");
3882         }
3883         die_error('404 Not Found', "File name not defined") if (!$file_name);
3884         $hash_base ||= git_get_head_hash($project);
3885         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3886         my %co = parse_commit($hash_base)
3887                 or die_error(undef, "Reading commit failed");
3888         if (!defined $hash) {
3889                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3890                         or die_error(undef, "Error looking up file");
3891         }
3892         $ftype = git_get_type($hash);
3893         if ($ftype !~ "blob") {
3894                 die_error('400 Bad Request', "Object is not a blob");
3895         }
3896         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3897               $file_name, $hash_base)
3898                 or die_error(undef, "Open git-blame failed");
3899         git_header_html();
3900         my $formats_nav =
3901                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3902                         "blob") .
3903                 " | " .
3904                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3905                         "history") .
3906                 " | " .
3907                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3908                         "HEAD");
3909         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3910         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3911         git_print_page_path($file_name, $ftype, $hash_base);
3912         my @rev_color = (qw(light2 dark2));
3913         my $num_colors = scalar(@rev_color);
3914         my $current_color = 0;
3915         my $last_rev;
3916         print <<HTML;
3917 <div class="page_body">
3918 <table class="blame">
3919 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3920 HTML
3921         my %metainfo = ();
3922         while (1) {
3923                 $_ = <$fd>;
3924                 last unless defined $_;
3925                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3926                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3927                 if (!exists $metainfo{$full_rev}) {
3928                         $metainfo{$full_rev} = {};
3929                 }
3930                 my $meta = $metainfo{$full_rev};
3931                 while (<$fd>) {
3932                         last if (s/^\t//);
3933                         if (/^(\S+) (.*)$/) {
3934                                 $meta->{$1} = $2;
3935                         }
3936                 }
3937                 my $data = $_;
3938                 chomp $data;
3939                 my $rev = substr($full_rev, 0, 8);
3940                 my $author = $meta->{'author'};
3941                 my %date = parse_date($meta->{'author-time'},
3942                                       $meta->{'author-tz'});
3943                 my $date = $date{'iso-tz'};
3944                 if ($group_size) {
3945                         $current_color = ++$current_color % $num_colors;
3946                 }
3947                 print "<tr class=\"$rev_color[$current_color]\">\n";
3948                 if ($group_size) {
3949                         print "<td class=\"sha1\"";
3950                         print " title=\"". esc_html($author) . ", $date\"";
3951                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3952                         print ">";
3953                         print $cgi->a({-href => href(action=>"commit",
3954                                                      hash=>$full_rev,
3955                                                      file_name=>$file_name)},
3956                                       esc_html($rev));
3957                         print "</td>\n";
3958                 }
3959                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3960                         or die_error(undef, "Open git-rev-parse failed");
3961                 my $parent_commit = <$dd>;
3962                 close $dd;
3963                 chomp($parent_commit);
3964                 my $blamed = href(action => 'blame',
3965                                   file_name => $meta->{'filename'},
3966                                   hash_base => $parent_commit);
3967                 print "<td class=\"linenr\">";
3968                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3969                                 -id => "l$lineno",
3970                                 -class => "linenr" },
3971                               esc_html($lineno));
3972                 print "</td>";
3973                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3974                 print "</tr>\n";
3975         }
3976         print "</table>\n";
3977         print "</div>";
3978         close $fd
3979                 or print "Reading blob failed\n";
3980         git_footer_html();
3981 }
3982
3983 sub git_blame {
3984         my $fd;
3985
3986         my ($have_blame) = gitweb_check_feature('blame');
3987         if (!$have_blame) {
3988                 die_error('403 Permission denied', "Permission denied");
3989         }
3990         die_error('404 Not Found', "File name not defined") if (!$file_name);
3991         $hash_base ||= git_get_head_hash($project);
3992         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3993         my %co = parse_commit($hash_base)
3994                 or die_error(undef, "Reading commit failed");
3995         if (!defined $hash) {
3996                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3997                         or die_error(undef, "Error lookup file");
3998         }
3999         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4000                 or die_error(undef, "Open git-annotate failed");
4001         git_header_html();
4002         my $formats_nav =
4003                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4004                         "blob") .
4005                 " | " .
4006                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4007                         "history") .
4008                 " | " .
4009                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4010                         "HEAD");
4011         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4012         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4013         git_print_page_path($file_name, 'blob', $hash_base);
4014         print "<div class=\"page_body\">\n";
4015         print <<HTML;
4016 <table class="blame">
4017   <tr>
4018     <th>Commit</th>
4019     <th>Age</th>
4020     <th>Author</th>
4021     <th>Line</th>
4022     <th>Data</th>
4023   </tr>
4024 HTML
4025         my @line_class = (qw(light dark));
4026         my $line_class_len = scalar (@line_class);
4027         my $line_class_num = $#line_class;
4028         while (my $line = <$fd>) {
4029                 my $long_rev;
4030                 my $short_rev;
4031                 my $author;
4032                 my $time;
4033                 my $lineno;
4034                 my $data;
4035                 my $age;
4036                 my $age_str;
4037                 my $age_class;
4038
4039                 chomp $line;
4040                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4041
4042                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4043                         $long_rev = $1;
4044                         $author   = $2;
4045                         $time     = $3;
4046                         $lineno   = $4;
4047                         $data     = $5;
4048                 } else {
4049                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4050                         next;
4051                 }
4052                 $short_rev  = substr ($long_rev, 0, 8);
4053                 $age        = time () - $time;
4054                 $age_str    = age_string ($age);
4055                 $age_str    =~ s/ /&nbsp;/g;
4056                 $age_class  = age_class($age);
4057                 $author     = esc_html ($author);
4058                 $author     =~ s/ /&nbsp;/g;
4059
4060                 $data = untabify($data);
4061                 $data = esc_html ($data);
4062
4063                 print <<HTML;
4064   <tr class="$line_class[$line_class_num]">
4065     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4066     <td class="$age_class">$age_str</td>
4067     <td>$author</td>
4068     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4069     <td class="pre">$data</td>
4070   </tr>
4071 HTML
4072         } # while (my $line = <$fd>)
4073         print "</table>\n\n";
4074         close $fd
4075                 or print "Reading blob failed.\n";
4076         print "</div>";
4077         git_footer_html();
4078 }
4079
4080 sub git_tags {
4081         my $head = git_get_head_hash($project);
4082         git_header_html();
4083         git_print_page_nav('','', $head,undef,$head);
4084         git_print_header_div('summary', $project);
4085
4086         my @tagslist = git_get_tags_list();
4087         if (@tagslist) {
4088                 git_tags_body(\@tagslist);
4089         }
4090         git_footer_html();
4091 }
4092
4093 sub git_heads {
4094         my $head = git_get_head_hash($project);
4095         git_header_html();
4096         git_print_page_nav('','', $head,undef,$head);
4097         git_print_header_div('summary', $project);
4098
4099         my @headslist = git_get_heads_list();
4100         if (@headslist) {
4101                 git_heads_body(\@headslist, $head);
4102         }
4103         git_footer_html();
4104 }
4105
4106 sub git_blob_plain {
4107         my $expires;
4108
4109         if (!defined $hash) {
4110                 if (defined $file_name) {
4111                         my $base = $hash_base || git_get_head_hash($project);
4112                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4113                                 or die_error(undef, "Error lookup file");
4114                 } else {
4115                         die_error(undef, "No file name defined");
4116                 }
4117         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4118                 # blobs defined by non-textual hash id's can be cached
4119                 $expires = "+1d";
4120         }
4121
4122         my $type = shift;
4123         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4124                 or die_error(undef, "Couldn't cat $file_name, $hash");
4125
4126         $type ||= blob_mimetype($fd, $file_name);
4127
4128         # save as filename, even when no $file_name is given
4129         my $save_as = "$hash";
4130         if (defined $file_name) {
4131                 $save_as = $file_name;
4132         } elsif ($type =~ m/^text\//) {
4133                 $save_as .= '.txt';
4134         }
4135
4136         print $cgi->header(
4137                 -type => "$type",
4138                 -expires=>$expires,
4139                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4140         undef $/;
4141         binmode STDOUT, ':raw';
4142         print <$fd>;
4143         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4144         $/ = "\n";
4145         close $fd;
4146 }
4147
4148 sub git_blob {
4149         my $expires;
4150
4151         if (!defined $hash) {
4152                 if (defined $file_name) {
4153                         my $base = $hash_base || git_get_head_hash($project);
4154                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4155                                 or die_error(undef, "Error lookup file");
4156                 } else {
4157                         die_error(undef, "No file name defined");
4158                 }
4159         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4160                 # blobs defined by non-textual hash id's can be cached
4161                 $expires = "+1d";
4162         }
4163
4164         my ($have_blame) = gitweb_check_feature('blame');
4165         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4166                 or die_error(undef, "Couldn't cat $file_name, $hash");
4167         my $mimetype = blob_mimetype($fd, $file_name);
4168         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4169                 close $fd;
4170                 return git_blob_plain($mimetype);
4171         }
4172         # we can have blame only for text/* mimetype
4173         $have_blame &&= ($mimetype =~ m!^text/!);
4174
4175         git_header_html(undef, $expires);
4176         my $formats_nav = '';
4177         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4178                 if (defined $file_name) {
4179                         if ($have_blame) {
4180                                 $formats_nav .=
4181                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4182                                                                hash=>$hash, file_name=>$file_name)},
4183                                                 "blame") .
4184                                         " | ";
4185                         }
4186                         $formats_nav .=
4187                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4188                                                        hash=>$hash, file_name=>$file_name)},
4189                                         "history") .
4190                                 " | " .
4191                                 $cgi->a({-href => href(action=>"blob_plain",
4192                                                        hash=>$hash, file_name=>$file_name)},
4193                                         "raw") .
4194                                 " | " .
4195                                 $cgi->a({-href => href(action=>"blob",
4196                                                        hash_base=>"HEAD", file_name=>$file_name)},
4197                                         "HEAD");
4198                 } else {
4199                         $formats_nav .=
4200                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4201                 }
4202                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4203                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4204         } else {
4205                 print "<div class=\"page_nav\">\n" .
4206                       "<br/><br/></div>\n" .
4207                       "<div class=\"title\">$hash</div>\n";
4208         }
4209         git_print_page_path($file_name, "blob", $hash_base);
4210         print "<div class=\"page_body\">\n";
4211         if ($mimetype =~ m!^text/!) {
4212                 my $nr;
4213                 while (my $line = <$fd>) {
4214                         chomp $line;
4215                         $nr++;
4216                         $line = untabify($line);
4217                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4218                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4219                 }
4220         } elsif ($mimetype =~ m!^image/!) {
4221                 print qq!<img type="$mimetype"!;
4222                 if ($file_name) {
4223                         print qq! alt="$file_name" title="$file_name"!;
4224                 }
4225                 print qq! src="! .
4226                       href(action=>"blob_plain", hash=>$hash,
4227                            hash_base=>$hash_base, file_name=>$file_name) .
4228                       qq!" />\n!;
4229         }
4230         close $fd
4231                 or print "Reading blob failed.\n";
4232         print "</div>";
4233         git_footer_html();
4234 }
4235
4236 sub git_tree {
4237         if (!defined $hash_base) {
4238                 $hash_base = "HEAD";
4239         }
4240         if (!defined $hash) {
4241                 if (defined $file_name) {
4242                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4243                 } else {
4244                         $hash = $hash_base;
4245                 }
4246         }
4247         $/ = "\0";
4248         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4249                 or die_error(undef, "Open git-ls-tree failed");
4250         my @entries = map { chomp; $_ } <$fd>;
4251         close $fd or die_error(undef, "Reading tree failed");
4252         $/ = "\n";
4253
4254         my $refs = git_get_references();
4255         my $ref = format_ref_marker($refs, $hash_base);
4256         git_header_html();
4257         my $basedir = '';
4258         my ($have_blame) = gitweb_check_feature('blame');
4259         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4260                 my @views_nav = ();
4261                 if (defined $file_name) {
4262                         push @views_nav,
4263                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4264                                                        hash=>$hash, file_name=>$file_name)},
4265                                         "history"),
4266                                 $cgi->a({-href => href(action=>"tree",
4267                                                        hash_base=>"HEAD", file_name=>$file_name)},
4268                                         "HEAD"),
4269                 }
4270                 my $snapshot_links = format_snapshot_links($hash);
4271                 if (defined $snapshot_links) {
4272                         # FIXME: Should be available when we have no hash base as well.
4273                         push @views_nav, $snapshot_links;
4274                 }
4275                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4276                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4277         } else {
4278                 undef $hash_base;
4279                 print "<div class=\"page_nav\">\n";
4280                 print "<br/><br/></div>\n";
4281                 print "<div class=\"title\">$hash</div>\n";
4282         }
4283         if (defined $file_name) {
4284                 $basedir = $file_name;
4285                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4286                         $basedir .= '/';
4287                 }
4288         }
4289         git_print_page_path($file_name, 'tree', $hash_base);
4290         print "<div class=\"page_body\">\n";
4291         print "<table cellspacing=\"0\">\n";
4292         my $alternate = 1;
4293         # '..' (top directory) link if possible
4294         if (defined $hash_base &&
4295             defined $file_name && $file_name =~ m![^/]+$!) {
4296                 if ($alternate) {
4297                         print "<tr class=\"dark\">\n";
4298                 } else {
4299                         print "<tr class=\"light\">\n";
4300                 }
4301                 $alternate ^= 1;
4302
4303                 my $up = $file_name;
4304                 $up =~ s!/?[^/]+$!!;
4305                 undef $up unless $up;
4306                 # based on git_print_tree_entry
4307                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4308                 print '<td class="list">';
4309                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4310                                              file_name=>$up)},
4311                               "..");
4312                 print "</td>\n";
4313                 print "<td class=\"link\"></td>\n";
4314
4315                 print "</tr>\n";
4316         }
4317         foreach my $line (@entries) {
4318                 my %t = parse_ls_tree_line($line, -z => 1);
4319
4320                 if ($alternate) {
4321                         print "<tr class=\"dark\">\n";
4322                 } else {
4323                         print "<tr class=\"light\">\n";
4324                 }
4325                 $alternate ^= 1;
4326
4327                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4328
4329                 print "</tr>\n";
4330         }
4331         print "</table>\n" .
4332               "</div>";
4333         git_footer_html();
4334 }
4335
4336 sub git_snapshot {
4337         my @supported_fmts = gitweb_check_feature('snapshot');
4338         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4339
4340         my $format = $cgi->param('sf');
4341         if (!@supported_fmts) {
4342                 die_error('403 Permission denied', "Permission denied");
4343         }
4344         # default to first supported snapshot format
4345         $format ||= $supported_fmts[0];
4346         if ($format !~ m/^[a-z0-9]+$/) {
4347                 die_error(undef, "Invalid snapshot format parameter");
4348         } elsif (!exists($known_snapshot_formats{$format})) {
4349                 die_error(undef, "Unknown snapshot format");
4350         } elsif (!grep($_ eq $format, @supported_fmts)) {
4351                 die_error(undef, "Unsupported snapshot format");
4352         }
4353
4354         if (!defined $hash) {
4355                 $hash = git_get_head_hash($project);
4356         }
4357
4358         my $git_command = git_cmd_str();
4359         my $name = $project;
4360         $name =~ s,([^/])/*\.git$,$1,;
4361         $name = basename($name);
4362         my $filename = to_utf8($name);
4363         $name =~ s/\047/\047\\\047\047/g;
4364         my $cmd;
4365         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4366         $cmd = "$git_command archive " .
4367                 "--format=$known_snapshot_formats{$format}{'format'} " .
4368                 "--prefix=\'$name\'/ $hash";
4369         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4370                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4371         }
4372
4373         print $cgi->header(
4374                 -type => $known_snapshot_formats{$format}{'type'},
4375                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4376                 -status => '200 OK');
4377
4378         open my $fd, "-|", $cmd
4379                 or die_error(undef, "Execute git-archive failed");
4380         binmode STDOUT, ':raw';
4381         print <$fd>;
4382         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4383         close $fd;
4384 }
4385
4386 sub git_log {
4387         my $head = git_get_head_hash($project);
4388         if (!defined $hash) {
4389                 $hash = $head;
4390         }
4391         if (!defined $page) {
4392                 $page = 0;
4393         }
4394         my $refs = git_get_references();
4395
4396         my @commitlist = parse_commits($hash, 101, (100 * $page));
4397
4398         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4399
4400         git_header_html();
4401         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4402
4403         if (!@commitlist) {
4404                 my %co = parse_commit($hash);
4405
4406                 git_print_header_div('summary', $project);
4407                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4408         }
4409         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4410         for (my $i = 0; $i <= $to; $i++) {
4411                 my %co = %{$commitlist[$i]};
4412                 next if !%co;
4413                 my $commit = $co{'id'};
4414                 my $ref = format_ref_marker($refs, $commit);
4415                 my %ad = parse_date($co{'author_epoch'});
4416                 git_print_header_div('commit',
4417                                "<span class=\"age\">$co{'age_string'}</span>" .
4418                                esc_html($co{'title'}) . $ref,
4419                                $commit);
4420                 print "<div class=\"title_text\">\n" .
4421                       "<div class=\"log_link\">\n" .
4422                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4423                       " | " .
4424                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4425                       " | " .
4426                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4427                       "<br/>\n" .
4428                       "</div>\n" .
4429                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4430                       "</div>\n";
4431
4432                 print "<div class=\"log_body\">\n";
4433                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4434                 print "</div>\n";
4435         }
4436         if ($#commitlist >= 100) {
4437                 print "<div class=\"page_nav\">\n";
4438                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4439                                -accesskey => "n", -title => "Alt-n"}, "next");
4440                 print "</div>\n";
4441         }
4442         git_footer_html();
4443 }
4444
4445 sub git_commit {
4446         $hash ||= $hash_base || "HEAD";
4447         my %co = parse_commit($hash);
4448         if (!%co) {
4449                 die_error(undef, "Unknown commit object");
4450         }
4451         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4452         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4453
4454         my $parent  = $co{'parent'};
4455         my $parents = $co{'parents'}; # listref
4456
4457         # we need to prepare $formats_nav before any parameter munging
4458         my $formats_nav;
4459         if (!defined $parent) {
4460                 # --root commitdiff
4461                 $formats_nav .= '(initial)';
4462         } elsif (@$parents == 1) {
4463                 # single parent commit
4464                 $formats_nav .=
4465                         '(parent: ' .
4466                         $cgi->a({-href => href(action=>"commit",
4467                                                hash=>$parent)},
4468                                 esc_html(substr($parent, 0, 7))) .
4469                         ')';
4470         } else {
4471                 # merge commit
4472                 $formats_nav .=
4473                         '(merge: ' .
4474                         join(' ', map {
4475                                 $cgi->a({-href => href(action=>"commit",
4476                                                        hash=>$_)},
4477                                         esc_html(substr($_, 0, 7)));
4478                         } @$parents ) .
4479                         ')';
4480         }
4481
4482         if (!defined $parent) {
4483                 $parent = "--root";
4484         }
4485         my @difftree;
4486         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4487                 @diff_opts,
4488                 (@$parents <= 1 ? $parent : '-c'),
4489                 $hash, "--"
4490                 or die_error(undef, "Open git-diff-tree failed");
4491         @difftree = map { chomp; $_ } <$fd>;
4492         close $fd or die_error(undef, "Reading git-diff-tree failed");
4493
4494         # non-textual hash id's can be cached
4495         my $expires;
4496         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4497                 $expires = "+1d";
4498         }
4499         my $refs = git_get_references();
4500         my $ref = format_ref_marker($refs, $co{'id'});
4501
4502         git_header_html(undef, $expires);
4503         git_print_page_nav('commit', '',
4504                            $hash, $co{'tree'}, $hash,
4505                            $formats_nav);
4506
4507         if (defined $co{'parent'}) {
4508                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4509         } else {
4510                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4511         }
4512         print "<div class=\"title_text\">\n" .
4513               "<table cellspacing=\"0\">\n";
4514         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4515               "<tr>" .
4516               "<td></td><td> $ad{'rfc2822'}";
4517         if ($ad{'hour_local'} < 6) {
4518                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4519                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4520         } else {
4521                 printf(" (%02d:%02d %s)",
4522                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4523         }
4524         print "</td>" .
4525               "</tr>\n";
4526         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4527         print "<tr><td></td><td> $cd{'rfc2822'}" .
4528               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4529               "</td></tr>\n";
4530         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4531         print "<tr>" .
4532               "<td>tree</td>" .
4533               "<td class=\"sha1\">" .
4534               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4535                        class => "list"}, $co{'tree'}) .
4536               "</td>" .
4537               "<td class=\"link\">" .
4538               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4539                       "tree");
4540         my $snapshot_links = format_snapshot_links($hash);
4541         if (defined $snapshot_links) {
4542                 print " | " . $snapshot_links;
4543         }
4544         print "</td>" .
4545               "</tr>\n";
4546
4547         foreach my $par (@$parents) {
4548                 print "<tr>" .
4549                       "<td>parent</td>" .
4550                       "<td class=\"sha1\">" .
4551                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4552                                class => "list"}, $par) .
4553                       "</td>" .
4554                       "<td class=\"link\">" .
4555                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4556                       " | " .
4557                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4558                       "</td>" .
4559                       "</tr>\n";
4560         }
4561         print "</table>".
4562               "</div>\n";
4563
4564         print "<div class=\"page_body\">\n";
4565         git_print_log($co{'comment'});
4566         print "</div>\n";
4567
4568         git_difftree_body(\@difftree, $hash, @$parents);
4569
4570         git_footer_html();
4571 }
4572
4573 sub git_object {
4574         # object is defined by:
4575         # - hash or hash_base alone
4576         # - hash_base and file_name
4577         my $type;
4578
4579         # - hash or hash_base alone
4580         if ($hash || ($hash_base && !defined $file_name)) {
4581                 my $object_id = $hash || $hash_base;
4582
4583                 my $git_command = git_cmd_str();
4584                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4585                         or die_error('404 Not Found', "Object does not exist");
4586                 $type = <$fd>;
4587                 chomp $type;
4588                 close $fd
4589                         or die_error('404 Not Found', "Object does not exist");
4590
4591         # - hash_base and file_name
4592         } elsif ($hash_base && defined $file_name) {
4593                 $file_name =~ s,/+$,,;
4594
4595                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4596                         or die_error('404 Not Found', "Base object does not exist");
4597
4598                 # here errors should not hapen
4599                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4600                         or die_error(undef, "Open git-ls-tree failed");
4601                 my $line = <$fd>;
4602                 close $fd;
4603
4604                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4605                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4606                         die_error('404 Not Found', "File or directory for given base does not exist");
4607                 }
4608                 $type = $2;
4609                 $hash = $3;
4610         } else {
4611                 die_error('404 Not Found', "Not enough information to find object");
4612         }
4613
4614         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4615                                           hash=>$hash, hash_base=>$hash_base,
4616                                           file_name=>$file_name),
4617                              -status => '302 Found');
4618 }
4619
4620 sub git_blobdiff {
4621         my $format = shift || 'html';
4622
4623         my $fd;
4624         my @difftree;
4625         my %diffinfo;
4626         my $expires;
4627
4628         # preparing $fd and %diffinfo for git_patchset_body
4629         # new style URI
4630         if (defined $hash_base && defined $hash_parent_base) {
4631                 if (defined $file_name) {
4632                         # read raw output
4633                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4634                                 $hash_parent_base, $hash_base,
4635                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4636                                 or die_error(undef, "Open git-diff-tree failed");
4637                         @difftree = map { chomp; $_ } <$fd>;
4638                         close $fd
4639                                 or die_error(undef, "Reading git-diff-tree failed");
4640                         @difftree
4641                                 or die_error('404 Not Found', "Blob diff not found");
4642
4643                 } elsif (defined $hash &&
4644                          $hash =~ /[0-9a-fA-F]{40}/) {
4645                         # try to find filename from $hash
4646
4647                         # read filtered raw output
4648                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4649                                 $hash_parent_base, $hash_base, "--"
4650                                 or die_error(undef, "Open git-diff-tree failed");
4651                         @difftree =
4652                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4653                                 # $hash == to_id
4654                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4655                                 map { chomp; $_ } <$fd>;
4656                         close $fd
4657                                 or die_error(undef, "Reading git-diff-tree failed");
4658                         @difftree
4659                                 or die_error('404 Not Found', "Blob diff not found");
4660
4661                 } else {
4662                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4663                 }
4664
4665                 if (@difftree > 1) {
4666                         die_error('404 Not Found', "Ambiguous blob diff specification");
4667                 }
4668
4669                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4670                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4671                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4672
4673                 $hash_parent ||= $diffinfo{'from_id'};
4674                 $hash        ||= $diffinfo{'to_id'};
4675
4676                 # non-textual hash id's can be cached
4677                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4678                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4679                         $expires = '+1d';
4680                 }
4681
4682                 # open patch output
4683                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4684                         '-p', ($format eq 'html' ? "--full-index" : ()),
4685                         $hash_parent_base, $hash_base,
4686                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4687                         or die_error(undef, "Open git-diff-tree failed");
4688         }
4689
4690         # old/legacy style URI
4691         if (!%diffinfo && # if new style URI failed
4692             defined $hash && defined $hash_parent) {
4693                 # fake git-diff-tree raw output
4694                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4695                 $diffinfo{'from_id'} = $hash_parent;
4696                 $diffinfo{'to_id'}   = $hash;
4697                 if (defined $file_name) {
4698                         if (defined $file_parent) {
4699                                 $diffinfo{'status'} = '2';
4700                                 $diffinfo{'from_file'} = $file_parent;
4701                                 $diffinfo{'to_file'}   = $file_name;
4702                         } else { # assume not renamed
4703                                 $diffinfo{'status'} = '1';
4704                                 $diffinfo{'from_file'} = $file_name;
4705                                 $diffinfo{'to_file'}   = $file_name;
4706                         }
4707                 } else { # no filename given
4708                         $diffinfo{'status'} = '2';
4709                         $diffinfo{'from_file'} = $hash_parent;
4710                         $diffinfo{'to_file'}   = $hash;
4711                 }
4712
4713                 # non-textual hash id's can be cached
4714                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4715                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4716                         $expires = '+1d';
4717                 }
4718
4719                 # open patch output
4720                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4721                         '-p', ($format eq 'html' ? "--full-index" : ()),
4722                         $hash_parent, $hash, "--"
4723                         or die_error(undef, "Open git-diff failed");
4724         } else  {
4725                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4726                         unless %diffinfo;
4727         }
4728
4729         # header
4730         if ($format eq 'html') {
4731                 my $formats_nav =
4732                         $cgi->a({-href => href(action=>"blobdiff_plain",
4733                                                hash=>$hash, hash_parent=>$hash_parent,
4734                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4735                                                file_name=>$file_name, file_parent=>$file_parent)},
4736                                 "raw");
4737                 git_header_html(undef, $expires);
4738                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4739                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4740                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4741                 } else {
4742                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4743                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4744                 }
4745                 if (defined $file_name) {
4746                         git_print_page_path($file_name, "blob", $hash_base);
4747                 } else {
4748                         print "<div class=\"page_path\"></div>\n";
4749                 }
4750
4751         } elsif ($format eq 'plain') {
4752                 print $cgi->header(
4753                         -type => 'text/plain',
4754                         -charset => 'utf-8',
4755                         -expires => $expires,
4756                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4757
4758                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4759
4760         } else {
4761                 die_error(undef, "Unknown blobdiff format");
4762         }
4763
4764         # patch
4765         if ($format eq 'html') {
4766                 print "<div class=\"page_body\">\n";
4767
4768                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4769                 close $fd;
4770
4771                 print "</div>\n"; # class="page_body"
4772                 git_footer_html();
4773
4774         } else {
4775                 while (my $line = <$fd>) {
4776                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4777                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4778
4779                         print $line;
4780
4781                         last if $line =~ m!^\+\+\+!;
4782                 }
4783                 local $/ = undef;
4784                 print <$fd>;
4785                 close $fd;
4786         }
4787 }
4788
4789 sub git_blobdiff_plain {
4790         git_blobdiff('plain');
4791 }
4792
4793 sub git_commitdiff {
4794         my $format = shift || 'html';
4795         $hash ||= $hash_base || "HEAD";
4796         my %co = parse_commit($hash);
4797         if (!%co) {
4798                 die_error(undef, "Unknown commit object");
4799         }
4800
4801         # choose format for commitdiff for merge
4802         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4803                 $hash_parent = '--cc';
4804         }
4805         # we need to prepare $formats_nav before almost any parameter munging
4806         my $formats_nav;
4807         if ($format eq 'html') {
4808                 $formats_nav =
4809                         $cgi->a({-href => href(action=>"commitdiff_plain",
4810                                                hash=>$hash, hash_parent=>$hash_parent)},
4811                                 "raw");
4812
4813                 if (defined $hash_parent &&
4814                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4815                         # commitdiff with two commits given
4816                         my $hash_parent_short = $hash_parent;
4817                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4818                                 $hash_parent_short = substr($hash_parent, 0, 7);
4819                         }
4820                         $formats_nav .=
4821                                 ' (from';
4822                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4823                                 if ($co{'parents'}[$i] eq $hash_parent) {
4824                                         $formats_nav .= ' parent ' . ($i+1);
4825                                         last;
4826                                 }
4827                         }
4828                         $formats_nav .= ': ' .
4829                                 $cgi->a({-href => href(action=>"commitdiff",
4830                                                        hash=>$hash_parent)},
4831                                         esc_html($hash_parent_short)) .
4832                                 ')';
4833                 } elsif (!$co{'parent'}) {
4834                         # --root commitdiff
4835                         $formats_nav .= ' (initial)';
4836                 } elsif (scalar @{$co{'parents'}} == 1) {
4837                         # single parent commit
4838                         $formats_nav .=
4839                                 ' (parent: ' .
4840                                 $cgi->a({-href => href(action=>"commitdiff",
4841                                                        hash=>$co{'parent'})},
4842                                         esc_html(substr($co{'parent'}, 0, 7))) .
4843                                 ')';
4844                 } else {
4845                         # merge commit
4846                         if ($hash_parent eq '--cc') {
4847                                 $formats_nav .= ' | ' .
4848                                         $cgi->a({-href => href(action=>"commitdiff",
4849                                                                hash=>$hash, hash_parent=>'-c')},
4850                                                 'combined');
4851                         } else { # $hash_parent eq '-c'
4852                                 $formats_nav .= ' | ' .
4853                                         $cgi->a({-href => href(action=>"commitdiff",
4854                                                                hash=>$hash, hash_parent=>'--cc')},
4855                                                 'compact');
4856                         }
4857                         $formats_nav .=
4858                                 ' (merge: ' .
4859                                 join(' ', map {
4860                                         $cgi->a({-href => href(action=>"commitdiff",
4861                                                                hash=>$_)},
4862                                                 esc_html(substr($_, 0, 7)));
4863                                 } @{$co{'parents'}} ) .
4864                                 ')';
4865                 }
4866         }
4867
4868         my $hash_parent_param = $hash_parent;
4869         if (!defined $hash_parent_param) {
4870                 # --cc for multiple parents, --root for parentless
4871                 $hash_parent_param =
4872                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4873         }
4874
4875         # read commitdiff
4876         my $fd;
4877         my @difftree;
4878         if ($format eq 'html') {
4879                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4880                         "--no-commit-id", "--patch-with-raw", "--full-index",
4881                         $hash_parent_param, $hash, "--"
4882                         or die_error(undef, "Open git-diff-tree failed");
4883
4884                 while (my $line = <$fd>) {
4885                         chomp $line;
4886                         # empty line ends raw part of diff-tree output
4887                         last unless $line;
4888                         push @difftree, scalar parse_difftree_raw_line($line);
4889                 }
4890
4891         } elsif ($format eq 'plain') {
4892                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4893                         '-p', $hash_parent_param, $hash, "--"
4894                         or die_error(undef, "Open git-diff-tree failed");
4895
4896         } else {
4897                 die_error(undef, "Unknown commitdiff format");
4898         }
4899
4900         # non-textual hash id's can be cached
4901         my $expires;
4902         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4903                 $expires = "+1d";
4904         }
4905
4906         # write commit message
4907         if ($format eq 'html') {
4908                 my $refs = git_get_references();
4909                 my $ref = format_ref_marker($refs, $co{'id'});
4910
4911                 git_header_html(undef, $expires);
4912                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4913                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4914                 git_print_authorship(\%co);
4915                 print "<div class=\"page_body\">\n";
4916                 if (@{$co{'comment'}} > 1) {
4917                         print "<div class=\"log\">\n";
4918                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4919                         print "</div>\n"; # class="log"
4920                 }
4921
4922         } elsif ($format eq 'plain') {
4923                 my $refs = git_get_references("tags");
4924                 my $tagname = git_get_rev_name_tags($hash);
4925                 my $filename = basename($project) . "-$hash.patch";
4926
4927                 print $cgi->header(
4928                         -type => 'text/plain',
4929                         -charset => 'utf-8',
4930                         -expires => $expires,
4931                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4932                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4933                 print <<TEXT;
4934 From: $co{'author'}
4935 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4936 Subject: $co{'title'}
4937 TEXT
4938                 print "X-Git-Tag: $tagname\n" if $tagname;
4939                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4940
4941                 foreach my $line (@{$co{'comment'}}) {
4942                         print "$line\n";
4943                 }
4944                 print "---\n\n";
4945         }
4946
4947         # write patch
4948         if ($format eq 'html') {
4949                 my $use_parents = !defined $hash_parent ||
4950                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4951                 git_difftree_body(\@difftree, $hash,
4952                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4953                 print "<br/>\n";
4954
4955                 git_patchset_body($fd, \@difftree, $hash,
4956                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4957                 close $fd;
4958                 print "</div>\n"; # class="page_body"
4959                 git_footer_html();
4960
4961         } elsif ($format eq 'plain') {
4962                 local $/ = undef;
4963                 print <$fd>;
4964                 close $fd
4965                         or print "Reading git-diff-tree failed\n";
4966         }
4967 }
4968
4969 sub git_commitdiff_plain {
4970         git_commitdiff('plain');
4971 }
4972
4973 sub git_history {
4974         if (!defined $hash_base) {
4975                 $hash_base = git_get_head_hash($project);
4976         }
4977         if (!defined $page) {
4978                 $page = 0;
4979         }
4980         my $ftype;
4981         my %co = parse_commit($hash_base);
4982         if (!%co) {
4983                 die_error(undef, "Unknown commit object");
4984         }
4985
4986         my $refs = git_get_references();
4987         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4988
4989         if (!defined $hash && defined $file_name) {
4990                 $hash = git_get_hash_by_path($hash_base, $file_name);
4991         }
4992         if (defined $hash) {
4993                 $ftype = git_get_type($hash);
4994         }
4995
4996         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
4997
4998         my $paging_nav = '';
4999         if ($page > 0) {
5000                 $paging_nav .=
5001                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5002                                                file_name=>$file_name)},
5003                                 "first");
5004                 $paging_nav .= " &sdot; " .
5005                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5006                                                file_name=>$file_name, page=>$page-1),
5007                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5008         } else {
5009                 $paging_nav .= "first";
5010                 $paging_nav .= " &sdot; prev";
5011         }
5012         if ($#commitlist >= 100) {
5013                 $paging_nav .= " &sdot; " .
5014                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5015                                                file_name=>$file_name, page=>$page+1),
5016                                  -accesskey => "n", -title => "Alt-n"}, "next");
5017         } else {
5018                 $paging_nav .= " &sdot; next";
5019         }
5020         my $next_link = '';
5021         if ($#commitlist >= 100) {
5022                 $next_link =
5023                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5024                                                file_name=>$file_name, page=>$page+1),
5025                                  -accesskey => "n", -title => "Alt-n"}, "next");
5026         }
5027
5028         git_header_html();
5029         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5030         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5031         git_print_page_path($file_name, $ftype, $hash_base);
5032
5033         git_history_body(\@commitlist, 0, 99,
5034                          $refs, $hash_base, $ftype, $next_link);
5035
5036         git_footer_html();
5037 }
5038
5039 sub git_search {
5040         my ($have_search) = gitweb_check_feature('search');
5041         if (!$have_search) {
5042                 die_error('403 Permission denied', "Permission denied");
5043         }
5044         if (!defined $searchtext) {
5045                 die_error(undef, "Text field empty");
5046         }
5047         if (!defined $hash) {
5048                 $hash = git_get_head_hash($project);
5049         }
5050         my %co = parse_commit($hash);
5051         if (!%co) {
5052                 die_error(undef, "Unknown commit object");
5053         }
5054         if (!defined $page) {
5055                 $page = 0;
5056         }
5057
5058         $searchtype ||= 'commit';
5059         if ($searchtype eq 'pickaxe') {
5060                 # pickaxe may take all resources of your box and run for several minutes
5061                 # with every query - so decide by yourself how public you make this feature
5062                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5063                 if (!$have_pickaxe) {
5064                         die_error('403 Permission denied', "Permission denied");
5065                 }
5066         }
5067         if ($searchtype eq 'grep') {
5068                 my ($have_grep) = gitweb_check_feature('grep');
5069                 if (!$have_grep) {
5070                         die_error('403 Permission denied', "Permission denied");
5071                 }
5072         }
5073
5074         git_header_html();
5075
5076         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5077                 my $greptype;
5078                 if ($searchtype eq 'commit') {
5079                         $greptype = "--grep=";
5080                 } elsif ($searchtype eq 'author') {
5081                         $greptype = "--author=";
5082                 } elsif ($searchtype eq 'committer') {
5083                         $greptype = "--committer=";
5084                 }
5085                 $greptype .= $search_regexp;
5086                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5087
5088                 my $paging_nav = '';
5089                 if ($page > 0) {
5090                         $paging_nav .=
5091                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5092                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5093                                         "first");
5094                         $paging_nav .= " &sdot; " .
5095                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5096                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5097                                                        page=>$page-1),
5098                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5099                 } else {
5100                         $paging_nav .= "first";
5101                         $paging_nav .= " &sdot; prev";
5102                 }
5103                 if ($#commitlist >= 100) {
5104                         $paging_nav .= " &sdot; " .
5105                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5106                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5107                                                        page=>$page+1),
5108                                          -accesskey => "n", -title => "Alt-n"}, "next");
5109                 } else {
5110                         $paging_nav .= " &sdot; next";
5111                 }
5112                 my $next_link = '';
5113                 if ($#commitlist >= 100) {
5114                         $next_link =
5115                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5116                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5117                                                        page=>$page+1),
5118                                          -accesskey => "n", -title => "Alt-n"}, "next");
5119                 }
5120
5121                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5122                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5123                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5124         }
5125
5126         if ($searchtype eq 'pickaxe') {
5127                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5128                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5129
5130                 print "<table cellspacing=\"0\">\n";
5131                 my $alternate = 1;
5132                 $/ = "\n";
5133                 my $git_command = git_cmd_str();
5134                 my $searchqtext = $searchtext;
5135                 $searchqtext =~ s/'/'\\''/;
5136                 open my $fd, "-|", "$git_command rev-list $hash | " .
5137                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5138                 undef %co;
5139                 my @files;
5140                 while (my $line = <$fd>) {
5141                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5142                                 my %set;
5143                                 $set{'file'} = $6;
5144                                 $set{'from_id'} = $3;
5145                                 $set{'to_id'} = $4;
5146                                 $set{'id'} = $set{'to_id'};
5147                                 if ($set{'id'} =~ m/0{40}/) {
5148                                         $set{'id'} = $set{'from_id'};
5149                                 }
5150                                 if ($set{'id'} =~ m/0{40}/) {
5151                                         next;
5152                                 }
5153                                 push @files, \%set;
5154                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5155                                 if (%co) {
5156                                         if ($alternate) {
5157                                                 print "<tr class=\"dark\">\n";
5158                                         } else {
5159                                                 print "<tr class=\"light\">\n";
5160                                         }
5161                                         $alternate ^= 1;
5162                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5163                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5164                                               "<td><i>" . $author . "</i></td>\n" .
5165                                               "<td>" .
5166                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5167                                                       -class => "list subject"},
5168                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5169                                         while (my $setref = shift @files) {
5170                                                 my %set = %$setref;
5171                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5172                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5173                                                               -class => "list"},
5174                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5175                                                       "<br/>\n";
5176                                         }
5177                                         print "</td>\n" .
5178                                               "<td class=\"link\">" .
5179                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5180                                               " | " .
5181                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5182                                         print "</td>\n" .
5183                                               "</tr>\n";
5184                                 }
5185                                 %co = parse_commit($1);
5186                         }
5187                 }
5188                 close $fd;
5189
5190                 print "</table>\n";
5191         }
5192
5193         if ($searchtype eq 'grep') {
5194                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5195                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5196
5197                 print "<table cellspacing=\"0\">\n";
5198                 my $alternate = 1;
5199                 my $matches = 0;
5200                 $/ = "\n";
5201                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5202                 my $lastfile = '';
5203                 while (my $line = <$fd>) {
5204                         chomp $line;
5205                         my ($file, $lno, $ltext, $binary);
5206                         last if ($matches++ > 1000);
5207                         if ($line =~ /^Binary file (.+) matches$/) {
5208                                 $file = $1;
5209                                 $binary = 1;
5210                         } else {
5211                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5212                         }
5213                         if ($file ne $lastfile) {
5214                                 $lastfile and print "</td></tr>\n";
5215                                 if ($alternate++) {
5216                                         print "<tr class=\"dark\">\n";
5217                                 } else {
5218                                         print "<tr class=\"light\">\n";
5219                                 }
5220                                 print "<td class=\"list\">".
5221                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5222                                                                file_name=>"$file"),
5223                                                 -class => "list"}, esc_path($file));
5224                                 print "</td><td>\n";
5225                                 $lastfile = $file;
5226                         }
5227                         if ($binary) {
5228                                 print "<div class=\"binary\">Binary file</div>\n";
5229                         } else {
5230                                 $ltext = untabify($ltext);
5231                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5232                                         $ltext = esc_html($1, -nbsp=>1);
5233                                         $ltext .= '<span class="match">';
5234                                         $ltext .= esc_html($2, -nbsp=>1);
5235                                         $ltext .= '</span>';
5236                                         $ltext .= esc_html($3, -nbsp=>1);
5237                                 } else {
5238                                         $ltext = esc_html($ltext, -nbsp=>1);
5239                                 }
5240                                 print "<div class=\"pre\">" .
5241                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5242                                                                file_name=>"$file").'#l'.$lno,
5243                                                 -class => "linenr"}, sprintf('%4i', $lno))
5244                                         . ' ' .  $ltext . "</div>\n";
5245                         }
5246                 }
5247                 if ($lastfile) {
5248                         print "</td></tr>\n";
5249                         if ($matches > 1000) {
5250                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5251                         }
5252                 } else {
5253                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5254                 }
5255                 close $fd;
5256
5257                 print "</table>\n";
5258         }
5259         git_footer_html();
5260 }
5261
5262 sub git_search_help {
5263         git_header_html();
5264         git_print_page_nav('','', $hash,$hash,$hash);
5265         print <<EOT;
5266 <dl>
5267 <dt><b>commit</b></dt>
5268 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5269 EOT
5270         my ($have_grep) = gitweb_check_feature('grep');
5271         if ($have_grep) {
5272                 print <<EOT;
5273 <dt><b>grep</b></dt>
5274 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5275     a different one) are searched for the given
5276 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5277 (POSIX extended) and the matches are listed. On large
5278 trees, this search can take a while and put some strain on the server, so please use it with
5279 some consideration.</dd>
5280 EOT
5281         }
5282         print <<EOT;
5283 <dt><b>author</b></dt>
5284 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5285 <dt><b>committer</b></dt>
5286 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5287 EOT
5288         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5289         if ($have_pickaxe) {
5290                 print <<EOT;
5291 <dt><b>pickaxe</b></dt>
5292 <dd>All commits that caused the string to appear or disappear from any file (changes that
5293 added, removed or "modified" the string) will be listed. This search can take a while and
5294 takes a lot of strain on the server, so please use it wisely.</dd>
5295 EOT
5296         }
5297         print "</dl>\n";
5298         git_footer_html();
5299 }
5300
5301 sub git_shortlog {
5302         my $head = git_get_head_hash($project);
5303         if (!defined $hash) {
5304                 $hash = $head;
5305         }
5306         if (!defined $page) {
5307                 $page = 0;
5308         }
5309         my $refs = git_get_references();
5310
5311         my @commitlist = parse_commits($hash, 101, (100 * $page));
5312
5313         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5314         my $next_link = '';
5315         if ($#commitlist >= 100) {
5316                 $next_link =
5317                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5318                                  -accesskey => "n", -title => "Alt-n"}, "next");
5319         }
5320
5321         git_header_html();
5322         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5323         git_print_header_div('summary', $project);
5324
5325         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5326
5327         git_footer_html();
5328 }
5329
5330 ## ......................................................................
5331 ## feeds (RSS, Atom; OPML)
5332
5333 sub git_feed {
5334         my $format = shift || 'atom';
5335         my ($have_blame) = gitweb_check_feature('blame');
5336
5337         # Atom: http://www.atomenabled.org/developers/syndication/
5338         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5339         if ($format ne 'rss' && $format ne 'atom') {
5340                 die_error(undef, "Unknown web feed format");
5341         }
5342
5343         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5344         my $head = $hash || 'HEAD';
5345         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5346
5347         my %latest_commit;
5348         my %latest_date;
5349         my $content_type = "application/$format+xml";
5350         if (defined $cgi->http('HTTP_ACCEPT') &&
5351                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5352                 # browser (feed reader) prefers text/xml
5353                 $content_type = 'text/xml';
5354         }
5355         if (defined($commitlist[0])) {
5356                 %latest_commit = %{$commitlist[0]};
5357                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5358                 print $cgi->header(
5359                         -type => $content_type,
5360                         -charset => 'utf-8',
5361                         -last_modified => $latest_date{'rfc2822'});
5362         } else {
5363                 print $cgi->header(
5364                         -type => $content_type,
5365                         -charset => 'utf-8');
5366         }
5367
5368         # Optimization: skip generating the body if client asks only
5369         # for Last-Modified date.
5370         return if ($cgi->request_method() eq 'HEAD');
5371
5372         # header variables
5373         my $title = "$site_name - $project/$action";
5374         my $feed_type = 'log';
5375         if (defined $hash) {
5376                 $title .= " - '$hash'";
5377                 $feed_type = 'branch log';
5378                 if (defined $file_name) {
5379                         $title .= " :: $file_name";
5380                         $feed_type = 'history';
5381                 }
5382         } elsif (defined $file_name) {
5383                 $title .= " - $file_name";
5384                 $feed_type = 'history';
5385         }
5386         $title .= " $feed_type";
5387         my $descr = git_get_project_description($project);
5388         if (defined $descr) {
5389                 $descr = esc_html($descr);
5390         } else {
5391                 $descr = "$project " .
5392                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5393                          " feed";
5394         }
5395         my $owner = git_get_project_owner($project);
5396         $owner = esc_html($owner);
5397
5398         #header
5399         my $alt_url;
5400         if (defined $file_name) {
5401                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5402         } elsif (defined $hash) {
5403                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5404         } else {
5405                 $alt_url = href(-full=>1, action=>"summary");
5406         }
5407         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5408         if ($format eq 'rss') {
5409                 print <<XML;
5410 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5411 <channel>
5412 XML
5413                 print "<title>$title</title>\n" .
5414                       "<link>$alt_url</link>\n" .
5415                       "<description>$descr</description>\n" .
5416                       "<language>en</language>\n";
5417         } elsif ($format eq 'atom') {
5418                 print <<XML;
5419 <feed xmlns="http://www.w3.org/2005/Atom">
5420 XML
5421                 print "<title>$title</title>\n" .
5422                       "<subtitle>$descr</subtitle>\n" .
5423                       '<link rel="alternate" type="text/html" href="' .
5424                       $alt_url . '" />' . "\n" .
5425                       '<link rel="self" type="' . $content_type . '" href="' .
5426                       $cgi->self_url() . '" />' . "\n" .
5427                       "<id>" . href(-full=>1) . "</id>\n" .
5428                       # use project owner for feed author
5429                       "<author><name>$owner</name></author>\n";
5430                 if (defined $favicon) {
5431                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5432                 }
5433                 if (defined $logo_url) {
5434                         # not twice as wide as tall: 72 x 27 pixels
5435                         print "<logo>" . esc_url($logo) . "</logo>\n";
5436                 }
5437                 if (! %latest_date) {
5438                         # dummy date to keep the feed valid until commits trickle in:
5439                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5440                 } else {
5441                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5442                 }
5443         }
5444
5445         # contents
5446         for (my $i = 0; $i <= $#commitlist; $i++) {
5447                 my %co = %{$commitlist[$i]};
5448                 my $commit = $co{'id'};
5449                 # we read 150, we always show 30 and the ones more recent than 48 hours
5450                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5451                         last;
5452                 }
5453                 my %cd = parse_date($co{'author_epoch'});
5454
5455                 # get list of changed files
5456                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5457                         $co{'parent'} || "--root",
5458                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5459                         or next;
5460                 my @difftree = map { chomp; $_ } <$fd>;
5461                 close $fd
5462                         or next;
5463
5464                 # print element (entry, item)
5465                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5466                 if ($format eq 'rss') {
5467                         print "<item>\n" .
5468                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5469                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5470                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5471                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5472                               "<link>$co_url</link>\n" .
5473                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5474                               "<content:encoded>" .
5475                               "<![CDATA[\n";
5476                 } elsif ($format eq 'atom') {
5477                         print "<entry>\n" .
5478                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5479                               "<updated>$cd{'iso-8601'}</updated>\n" .
5480                               "<author>\n" .
5481                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5482                         if ($co{'author_email'}) {
5483                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5484                         }
5485                         print "</author>\n" .
5486                               # use committer for contributor
5487                               "<contributor>\n" .
5488                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5489                         if ($co{'committer_email'}) {
5490                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5491                         }
5492                         print "</contributor>\n" .
5493                               "<published>$cd{'iso-8601'}</published>\n" .
5494                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5495                               "<id>$co_url</id>\n" .
5496                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5497                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5498                 }
5499                 my $comment = $co{'comment'};
5500                 print "<pre>\n";
5501                 foreach my $line (@$comment) {
5502                         $line = esc_html($line);
5503                         print "$line\n";
5504                 }
5505                 print "</pre><ul>\n";
5506                 foreach my $difftree_line (@difftree) {
5507                         my %difftree = parse_difftree_raw_line($difftree_line);
5508                         next if !$difftree{'from_id'};
5509
5510                         my $file = $difftree{'file'} || $difftree{'to_file'};
5511
5512                         print "<li>" .
5513                               "[" .
5514                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5515                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5516                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5517                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5518                                       -title => "diff"}, 'D');
5519                         if ($have_blame) {
5520                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5521                                                              file_name=>$file, hash_base=>$commit),
5522                                               -title => "blame"}, 'B');
5523                         }
5524                         # if this is not a feed of a file history
5525                         if (!defined $file_name || $file_name ne $file) {
5526                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5527                                                              file_name=>$file, hash=>$commit),
5528                                               -title => "history"}, 'H');
5529                         }
5530                         $file = esc_path($file);
5531                         print "] ".
5532                               "$file</li>\n";
5533                 }
5534                 if ($format eq 'rss') {
5535                         print "</ul>]]>\n" .
5536                               "</content:encoded>\n" .
5537                               "</item>\n";
5538                 } elsif ($format eq 'atom') {
5539                         print "</ul>\n</div>\n" .
5540                               "</content>\n" .
5541                               "</entry>\n";
5542                 }
5543         }
5544
5545         # end of feed
5546         if ($format eq 'rss') {
5547                 print "</channel>\n</rss>\n";
5548         }       elsif ($format eq 'atom') {
5549                 print "</feed>\n";
5550         }
5551 }
5552
5553 sub git_rss {
5554         git_feed('rss');
5555 }
5556
5557 sub git_atom {
5558         git_feed('atom');
5559 }
5560
5561 sub git_opml {
5562         my @list = git_get_projects_list();
5563
5564         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5565         print <<XML;
5566 <?xml version="1.0" encoding="utf-8"?>
5567 <opml version="1.0">
5568 <head>
5569   <title>$site_name OPML Export</title>
5570 </head>
5571 <body>
5572 <outline text="git RSS feeds">
5573 XML
5574
5575         foreach my $pr (@list) {
5576                 my %proj = %$pr;
5577                 my $head = git_get_head_hash($proj{'path'});
5578                 if (!defined $head) {
5579                         next;
5580                 }
5581                 $git_dir = "$projectroot/$proj{'path'}";
5582                 my %co = parse_commit($head);
5583                 if (!%co) {
5584                         next;
5585                 }
5586
5587                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5588                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5589                 my $html = "$my_url?p=$proj{'path'};a=summary";
5590                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5591         }
5592         print <<XML;
5593 </outline>
5594 </body>
5595 </opml>
5596 XML
5597 }