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'} = $1;
2015         }
2016
2017         return wantarray ? %res : \%res;
2018 }
2019
2020 # parse line of git-ls-tree output
2021 sub parse_ls_tree_line ($;%) {
2022         my $line = shift;
2023         my %opts = @_;
2024         my %res;
2025
2026         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2027         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2028
2029         $res{'mode'} = $1;
2030         $res{'type'} = $2;
2031         $res{'hash'} = $3;
2032         if ($opts{'-z'}) {
2033                 $res{'name'} = $4;
2034         } else {
2035                 $res{'name'} = unquote($4);
2036         }
2037
2038         return wantarray ? %res : \%res;
2039 }
2040
2041 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2042 sub parse_from_to_diffinfo {
2043         my ($diffinfo, $from, $to, @parents) = @_;
2044
2045         if ($diffinfo->{'nparents'}) {
2046                 # combined diff
2047                 $from->{'file'} = [];
2048                 $from->{'href'} = [];
2049                 fill_from_file_info($diffinfo, @parents)
2050                         unless exists $diffinfo->{'from_file'};
2051                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2052                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2053                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2054                                 $from->{'href'}[$i] = href(action=>"blob",
2055                                                            hash_base=>$parents[$i],
2056                                                            hash=>$diffinfo->{'from_id'}[$i],
2057                                                            file_name=>$from->{'file'}[$i]);
2058                         } else {
2059                                 $from->{'href'}[$i] = undef;
2060                         }
2061                 }
2062         } else {
2063                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2064                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2065                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2066                                                hash=>$diffinfo->{'from_id'},
2067                                                file_name=>$from->{'file'});
2068                 } else {
2069                         delete $from->{'href'};
2070                 }
2071         }
2072
2073         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2074         if (!is_deleted($diffinfo)) { # file exists in result
2075                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2076                                      hash=>$diffinfo->{'to_id'},
2077                                      file_name=>$to->{'file'});
2078         } else {
2079                 delete $to->{'href'};
2080         }
2081 }
2082
2083 ## ......................................................................
2084 ## parse to array of hashes functions
2085
2086 sub git_get_heads_list {
2087         my $limit = shift;
2088         my @headslist;
2089
2090         open my $fd, '-|', git_cmd(), 'for-each-ref',
2091                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2092                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2093                 'refs/heads'
2094                 or return;
2095         while (my $line = <$fd>) {
2096                 my %ref_item;
2097
2098                 chomp $line;
2099                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2100                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2101                 my ($committer, $epoch, $tz) =
2102                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2103                 $name =~ s!^refs/heads/!!;
2104
2105                 $ref_item{'name'}  = $name;
2106                 $ref_item{'id'}    = $hash;
2107                 $ref_item{'title'} = $title || '(no commit message)';
2108                 $ref_item{'epoch'} = $epoch;
2109                 if ($epoch) {
2110                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2111                 } else {
2112                         $ref_item{'age'} = "unknown";
2113                 }
2114
2115                 push @headslist, \%ref_item;
2116         }
2117         close $fd;
2118
2119         return wantarray ? @headslist : \@headslist;
2120 }
2121
2122 sub git_get_tags_list {
2123         my $limit = shift;
2124         my @tagslist;
2125
2126         open my $fd, '-|', git_cmd(), 'for-each-ref',
2127                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2128                 '--format=%(objectname) %(objecttype) %(refname) '.
2129                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2130                 'refs/tags'
2131                 or return;
2132         while (my $line = <$fd>) {
2133                 my %ref_item;
2134
2135                 chomp $line;
2136                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2137                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2138                 my ($creator, $epoch, $tz) =
2139                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2140                 $name =~ s!^refs/tags/!!;
2141
2142                 $ref_item{'type'} = $type;
2143                 $ref_item{'id'} = $id;
2144                 $ref_item{'name'} = $name;
2145                 if ($type eq "tag") {
2146                         $ref_item{'subject'} = $title;
2147                         $ref_item{'reftype'} = $reftype;
2148                         $ref_item{'refid'}   = $refid;
2149                 } else {
2150                         $ref_item{'reftype'} = $type;
2151                         $ref_item{'refid'}   = $id;
2152                 }
2153
2154                 if ($type eq "tag" || $type eq "commit") {
2155                         $ref_item{'epoch'} = $epoch;
2156                         if ($epoch) {
2157                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2158                         } else {
2159                                 $ref_item{'age'} = "unknown";
2160                         }
2161                 }
2162
2163                 push @tagslist, \%ref_item;
2164         }
2165         close $fd;
2166
2167         return wantarray ? @tagslist : \@tagslist;
2168 }
2169
2170 ## ----------------------------------------------------------------------
2171 ## filesystem-related functions
2172
2173 sub get_file_owner {
2174         my $path = shift;
2175
2176         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2177         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2178         if (!defined $gcos) {
2179                 return undef;
2180         }
2181         my $owner = $gcos;
2182         $owner =~ s/[,;].*$//;
2183         return to_utf8($owner);
2184 }
2185
2186 ## ......................................................................
2187 ## mimetype related functions
2188
2189 sub mimetype_guess_file {
2190         my $filename = shift;
2191         my $mimemap = shift;
2192         -r $mimemap or return undef;
2193
2194         my %mimemap;
2195         open(MIME, $mimemap) or return undef;
2196         while (<MIME>) {
2197                 next if m/^#/; # skip comments
2198                 my ($mime, $exts) = split(/\t+/);
2199                 if (defined $exts) {
2200                         my @exts = split(/\s+/, $exts);
2201                         foreach my $ext (@exts) {
2202                                 $mimemap{$ext} = $mime;
2203                         }
2204                 }
2205         }
2206         close(MIME);
2207
2208         $filename =~ /\.([^.]*)$/;
2209         return $mimemap{$1};
2210 }
2211
2212 sub mimetype_guess {
2213         my $filename = shift;
2214         my $mime;
2215         $filename =~ /\./ or return undef;
2216
2217         if ($mimetypes_file) {
2218                 my $file = $mimetypes_file;
2219                 if ($file !~ m!^/!) { # if it is relative path
2220                         # it is relative to project
2221                         $file = "$projectroot/$project/$file";
2222                 }
2223                 $mime = mimetype_guess_file($filename, $file);
2224         }
2225         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2226         return $mime;
2227 }
2228
2229 sub blob_mimetype {
2230         my $fd = shift;
2231         my $filename = shift;
2232
2233         if ($filename) {
2234                 my $mime = mimetype_guess($filename);
2235                 $mime and return $mime;
2236         }
2237
2238         # just in case
2239         return $default_blob_plain_mimetype unless $fd;
2240
2241         if (-T $fd) {
2242                 return 'text/plain' .
2243                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2244         } elsif (! $filename) {
2245                 return 'application/octet-stream';
2246         } elsif ($filename =~ m/\.png$/i) {
2247                 return 'image/png';
2248         } elsif ($filename =~ m/\.gif$/i) {
2249                 return 'image/gif';
2250         } elsif ($filename =~ m/\.jpe?g$/i) {
2251                 return 'image/jpeg';
2252         } else {
2253                 return 'application/octet-stream';
2254         }
2255 }
2256
2257 ## ======================================================================
2258 ## functions printing HTML: header, footer, error page
2259
2260 sub git_header_html {
2261         my $status = shift || "200 OK";
2262         my $expires = shift;
2263
2264         my $title = "$site_name";
2265         if (defined $project) {
2266                 $title .= " - " . to_utf8($project);
2267                 if (defined $action) {
2268                         $title .= "/$action";
2269                         if (defined $file_name) {
2270                                 $title .= " - " . esc_path($file_name);
2271                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2272                                         $title .= "/";
2273                                 }
2274                         }
2275                 }
2276         }
2277         my $content_type;
2278         # require explicit support from the UA if we are to send the page as
2279         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2280         # we have to do this because MSIE sometimes globs '*/*', pretending to
2281         # support xhtml+xml but choking when it gets what it asked for.
2282         if (defined $cgi->http('HTTP_ACCEPT') &&
2283             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2284             $cgi->Accept('application/xhtml+xml') != 0) {
2285                 $content_type = 'application/xhtml+xml';
2286         } else {
2287                 $content_type = 'text/html';
2288         }
2289         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2290                            -status=> $status, -expires => $expires);
2291         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2292         print <<EOF;
2293 <?xml version="1.0" encoding="utf-8"?>
2294 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2295 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2296 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2297 <!-- git core binaries version $git_version -->
2298 <head>
2299 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2300 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2301 <meta name="robots" content="index, nofollow"/>
2302 <title>$title</title>
2303 EOF
2304 # print out each stylesheet that exist
2305         if (defined $stylesheet) {
2306 #provides backwards capability for those people who define style sheet in a config file
2307                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2308         } else {
2309                 foreach my $stylesheet (@stylesheets) {
2310                         next unless $stylesheet;
2311                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2312                 }
2313         }
2314         if (defined $project) {
2315                 printf('<link rel="alternate" title="%s log RSS feed" '.
2316                        'href="%s" type="application/rss+xml" />'."\n",
2317                        esc_param($project), href(action=>"rss"));
2318                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2319                        'href="%s" type="application/rss+xml" />'."\n",
2320                        esc_param($project), href(action=>"rss",
2321                                                  extra_options=>"--no-merges"));
2322                 printf('<link rel="alternate" title="%s log Atom feed" '.
2323                        'href="%s" type="application/atom+xml" />'."\n",
2324                        esc_param($project), href(action=>"atom"));
2325                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2326                        'href="%s" type="application/atom+xml" />'."\n",
2327                        esc_param($project), href(action=>"atom",
2328                                                  extra_options=>"--no-merges"));
2329         } else {
2330                 printf('<link rel="alternate" title="%s projects list" '.
2331                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2332                        $site_name, href(project=>undef, action=>"project_index"));
2333                 printf('<link rel="alternate" title="%s projects feeds" '.
2334                        'href="%s" type="text/x-opml"/>'."\n",
2335                        $site_name, href(project=>undef, action=>"opml"));
2336         }
2337         if (defined $favicon) {
2338                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2339         }
2340
2341         print "</head>\n" .
2342               "<body>\n";
2343
2344         if (-f $site_header) {
2345                 open (my $fd, $site_header);
2346                 print <$fd>;
2347                 close $fd;
2348         }
2349
2350         print "<div class=\"page_header\">\n" .
2351               $cgi->a({-href => esc_url($logo_url),
2352                        -title => $logo_label},
2353                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2354         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2355         if (defined $project) {
2356                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2357                 if (defined $action) {
2358                         print " / $action";
2359                 }
2360                 print "\n";
2361         }
2362         print "</div>\n";
2363
2364         my ($have_search) = gitweb_check_feature('search');
2365         if ((defined $project) && ($have_search)) {
2366                 if (!defined $searchtext) {
2367                         $searchtext = "";
2368                 }
2369                 my $search_hash;
2370                 if (defined $hash_base) {
2371                         $search_hash = $hash_base;
2372                 } elsif (defined $hash) {
2373                         $search_hash = $hash;
2374                 } else {
2375                         $search_hash = "HEAD";
2376                 }
2377                 my $action = $my_uri;
2378                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2379                 if ($use_pathinfo) {
2380                         $action .= "/$project";
2381                 } else {
2382                         $cgi->param("p", $project);
2383                 }
2384                 $cgi->param("a", "search");
2385                 $cgi->param("h", $search_hash);
2386                 print $cgi->startform(-method => "get", -action => $action) .
2387                       "<div class=\"search\">\n" .
2388                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2389                       $cgi->hidden(-name => "a") . "\n" .
2390                       $cgi->hidden(-name => "h") . "\n" .
2391                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2392                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2393                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2394                       " search:\n",
2395                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2396                       "</div>" .
2397                       $cgi->end_form() . "\n";
2398         }
2399 }
2400
2401 sub git_footer_html {
2402         print "<div class=\"page_footer\">\n";
2403         if (defined $project) {
2404                 my $descr = git_get_project_description($project);
2405                 if (defined $descr) {
2406                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2407                 }
2408                 print $cgi->a({-href => href(action=>"rss"),
2409                               -class => "rss_logo"}, "RSS") . " ";
2410                 print $cgi->a({-href => href(action=>"atom"),
2411                               -class => "rss_logo"}, "Atom") . "\n";
2412         } else {
2413                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2414                               -class => "rss_logo"}, "OPML") . " ";
2415                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2416                               -class => "rss_logo"}, "TXT") . "\n";
2417         }
2418         print "</div>\n" ;
2419
2420         if (-f $site_footer) {
2421                 open (my $fd, $site_footer);
2422                 print <$fd>;
2423                 close $fd;
2424         }
2425
2426         print "</body>\n" .
2427               "</html>";
2428 }
2429
2430 sub die_error {
2431         my $status = shift || "403 Forbidden";
2432         my $error = shift || "Malformed query, file missing or permission denied";
2433
2434         git_header_html($status);
2435         print <<EOF;
2436 <div class="page_body">
2437 <br /><br />
2438 $status - $error
2439 <br />
2440 </div>
2441 EOF
2442         git_footer_html();
2443         exit;
2444 }
2445
2446 ## ----------------------------------------------------------------------
2447 ## functions printing or outputting HTML: navigation
2448
2449 sub git_print_page_nav {
2450         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2451         $extra = '' if !defined $extra; # pager or formats
2452
2453         my @navs = qw(summary shortlog log commit commitdiff tree);
2454         if ($suppress) {
2455                 @navs = grep { $_ ne $suppress } @navs;
2456         }
2457
2458         my %arg = map { $_ => {action=>$_} } @navs;
2459         if (defined $head) {
2460                 for (qw(commit commitdiff)) {
2461                         $arg{$_}{'hash'} = $head;
2462                 }
2463                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2464                         for (qw(shortlog log)) {
2465                                 $arg{$_}{'hash'} = $head;
2466                         }
2467                 }
2468         }
2469         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2470         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2471
2472         print "<div class=\"page_nav\">\n" .
2473                 (join " | ",
2474                  map { $_ eq $current ?
2475                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2476                  } @navs);
2477         print "<br/>\n$extra<br/>\n" .
2478               "</div>\n";
2479 }
2480
2481 sub format_paging_nav {
2482         my ($action, $hash, $head, $page, $nrevs) = @_;
2483         my $paging_nav;
2484
2485
2486         if ($hash ne $head || $page) {
2487                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2488         } else {
2489                 $paging_nav .= "HEAD";
2490         }
2491
2492         if ($page > 0) {
2493                 $paging_nav .= " &sdot; " .
2494                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2495                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2496         } else {
2497                 $paging_nav .= " &sdot; prev";
2498         }
2499
2500         if ($nrevs >= (100 * ($page+1)-1)) {
2501                 $paging_nav .= " &sdot; " .
2502                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2503                                  -accesskey => "n", -title => "Alt-n"}, "next");
2504         } else {
2505                 $paging_nav .= " &sdot; next";
2506         }
2507
2508         return $paging_nav;
2509 }
2510
2511 ## ......................................................................
2512 ## functions printing or outputting HTML: div
2513
2514 sub git_print_header_div {
2515         my ($action, $title, $hash, $hash_base) = @_;
2516         my %args = ();
2517
2518         $args{'action'} = $action;
2519         $args{'hash'} = $hash if $hash;
2520         $args{'hash_base'} = $hash_base if $hash_base;
2521
2522         print "<div class=\"header\">\n" .
2523               $cgi->a({-href => href(%args), -class => "title"},
2524               $title ? $title : $action) .
2525               "\n</div>\n";
2526 }
2527
2528 #sub git_print_authorship (\%) {
2529 sub git_print_authorship {
2530         my $co = shift;
2531
2532         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2533         print "<div class=\"author_date\">" .
2534               esc_html($co->{'author_name'}) .
2535               " [$ad{'rfc2822'}";
2536         if ($ad{'hour_local'} < 6) {
2537                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2538                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2539         } else {
2540                 printf(" (%02d:%02d %s)",
2541                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2542         }
2543         print "]</div>\n";
2544 }
2545
2546 sub git_print_page_path {
2547         my $name = shift;
2548         my $type = shift;
2549         my $hb = shift;
2550
2551
2552         print "<div class=\"page_path\">";
2553         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2554                       -title => 'tree root'}, to_utf8("[$project]"));
2555         print " / ";
2556         if (defined $name) {
2557                 my @dirname = split '/', $name;
2558                 my $basename = pop @dirname;
2559                 my $fullname = '';
2560
2561                 foreach my $dir (@dirname) {
2562                         $fullname .= ($fullname ? '/' : '') . $dir;
2563                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2564                                                      hash_base=>$hb),
2565                                       -title => $fullname}, esc_path($dir));
2566                         print " / ";
2567                 }
2568                 if (defined $type && $type eq 'blob') {
2569                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2570                                                      hash_base=>$hb),
2571                                       -title => $name}, esc_path($basename));
2572                 } elsif (defined $type && $type eq 'tree') {
2573                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2574                                                      hash_base=>$hb),
2575                                       -title => $name}, esc_path($basename));
2576                         print " / ";
2577                 } else {
2578                         print esc_path($basename);
2579                 }
2580         }
2581         print "<br/></div>\n";
2582 }
2583
2584 # sub git_print_log (\@;%) {
2585 sub git_print_log ($;%) {
2586         my $log = shift;
2587         my %opts = @_;
2588
2589         if ($opts{'-remove_title'}) {
2590                 # remove title, i.e. first line of log
2591                 shift @$log;
2592         }
2593         # remove leading empty lines
2594         while (defined $log->[0] && $log->[0] eq "") {
2595                 shift @$log;
2596         }
2597
2598         # print log
2599         my $signoff = 0;
2600         my $empty = 0;
2601         foreach my $line (@$log) {
2602                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2603                         $signoff = 1;
2604                         $empty = 0;
2605                         if (! $opts{'-remove_signoff'}) {
2606                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2607                                 next;
2608                         } else {
2609                                 # remove signoff lines
2610                                 next;
2611                         }
2612                 } else {
2613                         $signoff = 0;
2614                 }
2615
2616                 # print only one empty line
2617                 # do not print empty line after signoff
2618                 if ($line eq "") {
2619                         next if ($empty || $signoff);
2620                         $empty = 1;
2621                 } else {
2622                         $empty = 0;
2623                 }
2624
2625                 print format_log_line_html($line) . "<br/>\n";
2626         }
2627
2628         if ($opts{'-final_empty_line'}) {
2629                 # end with single empty line
2630                 print "<br/>\n" unless $empty;
2631         }
2632 }
2633
2634 # return link target (what link points to)
2635 sub git_get_link_target {
2636         my $hash = shift;
2637         my $link_target;
2638
2639         # read link
2640         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2641                 or return;
2642         {
2643                 local $/;
2644                 $link_target = <$fd>;
2645         }
2646         close $fd
2647                 or return;
2648
2649         return $link_target;
2650 }
2651
2652 # given link target, and the directory (basedir) the link is in,
2653 # return target of link relative to top directory (top tree);
2654 # return undef if it is not possible (including absolute links).
2655 sub normalize_link_target {
2656         my ($link_target, $basedir, $hash_base) = @_;
2657
2658         # we can normalize symlink target only if $hash_base is provided
2659         return unless $hash_base;
2660
2661         # absolute symlinks (beginning with '/') cannot be normalized
2662         return if (substr($link_target, 0, 1) eq '/');
2663
2664         # normalize link target to path from top (root) tree (dir)
2665         my $path;
2666         if ($basedir) {
2667                 $path = $basedir . '/' . $link_target;
2668         } else {
2669                 # we are in top (root) tree (dir)
2670                 $path = $link_target;
2671         }
2672
2673         # remove //, /./, and /../
2674         my @path_parts;
2675         foreach my $part (split('/', $path)) {
2676                 # discard '.' and ''
2677                 next if (!$part || $part eq '.');
2678                 # handle '..'
2679                 if ($part eq '..') {
2680                         if (@path_parts) {
2681                                 pop @path_parts;
2682                         } else {
2683                                 # link leads outside repository (outside top dir)
2684                                 return;
2685                         }
2686                 } else {
2687                         push @path_parts, $part;
2688                 }
2689         }
2690         $path = join('/', @path_parts);
2691
2692         return $path;
2693 }
2694
2695 # print tree entry (row of git_tree), but without encompassing <tr> element
2696 sub git_print_tree_entry {
2697         my ($t, $basedir, $hash_base, $have_blame) = @_;
2698
2699         my %base_key = ();
2700         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2701
2702         # The format of a table row is: mode list link.  Where mode is
2703         # the mode of the entry, list is the name of the entry, an href,
2704         # and link is the action links of the entry.
2705
2706         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2707         if ($t->{'type'} eq "blob") {
2708                 print "<td class=\"list\">" .
2709                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2710                                                file_name=>"$basedir$t->{'name'}", %base_key),
2711                                 -class => "list"}, esc_path($t->{'name'}));
2712                 if (S_ISLNK(oct $t->{'mode'})) {
2713                         my $link_target = git_get_link_target($t->{'hash'});
2714                         if ($link_target) {
2715                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2716                                 if (defined $norm_target) {
2717                                         print " -> " .
2718                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2719                                                                      file_name=>$norm_target),
2720                                                        -title => $norm_target}, esc_path($link_target));
2721                                 } else {
2722                                         print " -> " . esc_path($link_target);
2723                                 }
2724                         }
2725                 }
2726                 print "</td>\n";
2727                 print "<td class=\"link\">";
2728                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2729                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2730                               "blob");
2731                 if ($have_blame) {
2732                         print " | " .
2733                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2734                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2735                                       "blame");
2736                 }
2737                 if (defined $hash_base) {
2738                         print " | " .
2739                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2740                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2741                                       "history");
2742                 }
2743                 print " | " .
2744                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2745                                                file_name=>"$basedir$t->{'name'}")},
2746                                 "raw");
2747                 print "</td>\n";
2748
2749         } elsif ($t->{'type'} eq "tree") {
2750                 print "<td class=\"list\">";
2751                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2752                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2753                               esc_path($t->{'name'}));
2754                 print "</td>\n";
2755                 print "<td class=\"link\">";
2756                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2757                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2758                               "tree");
2759                 if (defined $hash_base) {
2760                         print " | " .
2761                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2762                                                      file_name=>"$basedir$t->{'name'}")},
2763                                       "history");
2764                 }
2765                 print "</td>\n";
2766         } else {
2767                 # unknown object: we can only present history for it
2768                 # (this includes 'commit' object, i.e. submodule support)
2769                 print "<td class=\"list\">" .
2770                       esc_path($t->{'name'}) .
2771                       "</td>\n";
2772                 print "<td class=\"link\">";
2773                 if (defined $hash_base) {
2774                         print $cgi->a({-href => href(action=>"history",
2775                                                      hash_base=>$hash_base,
2776                                                      file_name=>"$basedir$t->{'name'}")},
2777                                       "history");
2778                 }
2779                 print "</td>\n";
2780         }
2781 }
2782
2783 ## ......................................................................
2784 ## functions printing large fragments of HTML
2785
2786 sub fill_from_file_info {
2787         my ($diff, @parents) = @_;
2788
2789         $diff->{'from_file'} = [ ];
2790         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2791         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2792                 if ($diff->{'status'}[$i] eq 'R' ||
2793                     $diff->{'status'}[$i] eq 'C') {
2794                         $diff->{'from_file'}[$i] =
2795                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2796                 }
2797         }
2798
2799         return $diff;
2800 }
2801
2802 # parameters can be strings, or references to arrays of strings
2803 sub from_ids_eq {
2804         my ($a, $b) = @_;
2805
2806         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2807                 for (my $i = 0; $i < @$a; ++$i) {
2808                         return 0 unless ($a->[$i] eq $b->[$i]);
2809                 }
2810                 return 1;
2811         } elsif (!ref($a) && !ref($b)) {
2812                 return $a eq $b;
2813         } else {
2814                 return 0;
2815         }
2816 }
2817
2818 sub is_deleted {
2819         my $diffinfo = shift;
2820
2821         return $diffinfo->{'to_id'} eq ('0' x 40);
2822 }
2823
2824 sub git_difftree_body {
2825         my ($difftree, $hash, @parents) = @_;
2826         my ($parent) = $parents[0];
2827         my ($have_blame) = gitweb_check_feature('blame');
2828         print "<div class=\"list_head\">\n";
2829         if ($#{$difftree} > 10) {
2830                 print(($#{$difftree} + 1) . " files changed:\n");
2831         }
2832         print "</div>\n";
2833
2834         print "<table class=\"" .
2835               (@parents > 1 ? "combined " : "") .
2836               "diff_tree\">\n";
2837
2838         # header only for combined diff in 'commitdiff' view
2839         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2840         if ($has_header) {
2841                 # table header
2842                 print "<thead><tr>\n" .
2843                        "<th></th><th></th>\n"; # filename, patchN link
2844                 for (my $i = 0; $i < @parents; $i++) {
2845                         my $par = $parents[$i];
2846                         print "<th>" .
2847                               $cgi->a({-href => href(action=>"commitdiff",
2848                                                      hash=>$hash, hash_parent=>$par),
2849                                        -title => 'commitdiff to parent number ' .
2850                                                   ($i+1) . ': ' . substr($par,0,7)},
2851                                       $i+1) .
2852                               "&nbsp;</th>\n";
2853                 }
2854                 print "</tr></thead>\n<tbody>\n";
2855         }
2856
2857         my $alternate = 1;
2858         my $patchno = 0;
2859         foreach my $line (@{$difftree}) {
2860                 my $diff;
2861                 if (ref($line) eq "HASH") {
2862                         # pre-parsed (or generated by hand)
2863                         $diff = $line;
2864                 } else {
2865                         $diff = parse_difftree_raw_line($line);
2866                 }
2867
2868                 if ($alternate) {
2869                         print "<tr class=\"dark\">\n";
2870                 } else {
2871                         print "<tr class=\"light\">\n";
2872                 }
2873                 $alternate ^= 1;
2874
2875                 if (exists $diff->{'nparents'}) { # combined diff
2876
2877                         fill_from_file_info($diff, @parents)
2878                                 unless exists $diff->{'from_file'};
2879
2880                         if (!is_deleted($diff)) {
2881                                 # file exists in the result (child) commit
2882                                 print "<td>" .
2883                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2884                                                              file_name=>$diff->{'to_file'},
2885                                                              hash_base=>$hash),
2886                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2887                                       "</td>\n";
2888                         } else {
2889                                 print "<td>" .
2890                                       esc_path($diff->{'to_file'}) .
2891                                       "</td>\n";
2892                         }
2893
2894                         if ($action eq 'commitdiff') {
2895                                 # link to patch
2896                                 $patchno++;
2897                                 print "<td class=\"link\">" .
2898                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2899                                       " | " .
2900                                       "</td>\n";
2901                         }
2902
2903                         my $has_history = 0;
2904                         my $not_deleted = 0;
2905                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2906                                 my $hash_parent = $parents[$i];
2907                                 my $from_hash = $diff->{'from_id'}[$i];
2908                                 my $from_path = $diff->{'from_file'}[$i];
2909                                 my $status = $diff->{'status'}[$i];
2910
2911                                 $has_history ||= ($status ne 'A');
2912                                 $not_deleted ||= ($status ne 'D');
2913
2914                                 if ($status eq 'A') {
2915                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2916                                 } elsif ($status eq 'D') {
2917                                         print "<td class=\"link\">" .
2918                                               $cgi->a({-href => href(action=>"blob",
2919                                                                      hash_base=>$hash,
2920                                                                      hash=>$from_hash,
2921                                                                      file_name=>$from_path)},
2922                                                       "blob" . ($i+1)) .
2923                                               " | </td>\n";
2924                                 } else {
2925                                         if ($diff->{'to_id'} eq $from_hash) {
2926                                                 print "<td class=\"link nochange\">";
2927                                         } else {
2928                                                 print "<td class=\"link\">";
2929                                         }
2930                                         print $cgi->a({-href => href(action=>"blobdiff",
2931                                                                      hash=>$diff->{'to_id'},
2932                                                                      hash_parent=>$from_hash,
2933                                                                      hash_base=>$hash,
2934                                                                      hash_parent_base=>$hash_parent,
2935                                                                      file_name=>$diff->{'to_file'},
2936                                                                      file_parent=>$from_path)},
2937                                                       "diff" . ($i+1)) .
2938                                               " | </td>\n";
2939                                 }
2940                         }
2941
2942                         print "<td class=\"link\">";
2943                         if ($not_deleted) {
2944                                 print $cgi->a({-href => href(action=>"blob",
2945                                                              hash=>$diff->{'to_id'},
2946                                                              file_name=>$diff->{'to_file'},
2947                                                              hash_base=>$hash)},
2948                                               "blob");
2949                                 print " | " if ($has_history);
2950                         }
2951                         if ($has_history) {
2952                                 print $cgi->a({-href => href(action=>"history",
2953                                                              file_name=>$diff->{'to_file'},
2954                                                              hash_base=>$hash)},
2955                                               "history");
2956                         }
2957                         print "</td>\n";
2958
2959                         print "</tr>\n";
2960                         next; # instead of 'else' clause, to avoid extra indent
2961                 }
2962                 # else ordinary diff
2963
2964                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2965                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2966                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2967                         $to_mode_oct = oct $diff->{'to_mode'};
2968                         if (S_ISREG($to_mode_oct)) { # only for regular file
2969                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2970                         }
2971                         $to_file_type = file_type($diff->{'to_mode'});
2972                 }
2973                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2974                         $from_mode_oct = oct $diff->{'from_mode'};
2975                         if (S_ISREG($to_mode_oct)) { # only for regular file
2976                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2977                         }
2978                         $from_file_type = file_type($diff->{'from_mode'});
2979                 }
2980
2981                 if ($diff->{'status'} eq "A") { # created
2982                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2983                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2984                         $mode_chng   .= "]</span>";
2985                         print "<td>";
2986                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2987                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2988                                       -class => "list"}, esc_path($diff->{'file'}));
2989                         print "</td>\n";
2990                         print "<td>$mode_chng</td>\n";
2991                         print "<td class=\"link\">";
2992                         if ($action eq 'commitdiff') {
2993                                 # link to patch
2994                                 $patchno++;
2995                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2996                                 print " | ";
2997                         }
2998                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2999                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3000                                       "blob");
3001                         print "</td>\n";
3002
3003                 } elsif ($diff->{'status'} eq "D") { # deleted
3004                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3005                         print "<td>";
3006                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3007                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3008                                        -class => "list"}, esc_path($diff->{'file'}));
3009                         print "</td>\n";
3010                         print "<td>$mode_chng</td>\n";
3011                         print "<td class=\"link\">";
3012                         if ($action eq 'commitdiff') {
3013                                 # link to patch
3014                                 $patchno++;
3015                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3016                                 print " | ";
3017                         }
3018                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3019                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3020                                       "blob") . " | ";
3021                         if ($have_blame) {
3022                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3023                                                              file_name=>$diff->{'file'})},
3024                                               "blame") . " | ";
3025                         }
3026                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3027                                                      file_name=>$diff->{'file'})},
3028                                       "history");
3029                         print "</td>\n";
3030
3031                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3032                         my $mode_chnge = "";
3033                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3034                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3035                                 if ($from_file_type ne $to_file_type) {
3036                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3037                                 }
3038                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3039                                         if ($from_mode_str && $to_mode_str) {
3040                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3041                                         } elsif ($to_mode_str) {
3042                                                 $mode_chnge .= " mode: $to_mode_str";
3043                                         }
3044                                 }
3045                                 $mode_chnge .= "]</span>\n";
3046                         }
3047                         print "<td>";
3048                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3049                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3050                                       -class => "list"}, esc_path($diff->{'file'}));
3051                         print "</td>\n";
3052                         print "<td>$mode_chnge</td>\n";
3053                         print "<td class=\"link\">";
3054                         if ($action eq 'commitdiff') {
3055                                 # link to patch
3056                                 $patchno++;
3057                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3058                                       " | ";
3059                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3060                                 # "commit" view and modified file (not onlu mode changed)
3061                                 print $cgi->a({-href => href(action=>"blobdiff",
3062                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3063                                                              hash_base=>$hash, hash_parent_base=>$parent,
3064                                                              file_name=>$diff->{'file'})},
3065                                               "diff") .
3066                                       " | ";
3067                         }
3068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3069                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3070                                        "blob") . " | ";
3071                         if ($have_blame) {
3072                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3073                                                              file_name=>$diff->{'file'})},
3074                                               "blame") . " | ";
3075                         }
3076                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3077                                                      file_name=>$diff->{'file'})},
3078                                       "history");
3079                         print "</td>\n";
3080
3081                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3082                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3083                         my $nstatus = $status_name{$diff->{'status'}};
3084                         my $mode_chng = "";
3085                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3086                                 # mode also for directories, so we cannot use $to_mode_str
3087                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3088                         }
3089                         print "<td>" .
3090                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3091                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3092                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3093                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3094                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3095                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3096                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3097                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3098                               "<td class=\"link\">";
3099                         if ($action eq 'commitdiff') {
3100                                 # link to patch
3101                                 $patchno++;
3102                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3103                                       " | ";
3104                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3105                                 # "commit" view and modified file (not only pure rename or copy)
3106                                 print $cgi->a({-href => href(action=>"blobdiff",
3107                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3108                                                              hash_base=>$hash, hash_parent_base=>$parent,
3109                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3110                                               "diff") .
3111                                       " | ";
3112                         }
3113                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3114                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3115                                       "blob") . " | ";
3116                         if ($have_blame) {
3117                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3118                                                              file_name=>$diff->{'to_file'})},
3119                                               "blame") . " | ";
3120                         }
3121                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3122                                                     file_name=>$diff->{'to_file'})},
3123                                       "history");
3124                         print "</td>\n";
3125
3126                 } # we should not encounter Unmerged (U) or Unknown (X) status
3127                 print "</tr>\n";
3128         }
3129         print "</tbody>" if $has_header;
3130         print "</table>\n";
3131 }
3132
3133 sub git_patchset_body {
3134         my ($fd, $difftree, $hash, @hash_parents) = @_;
3135         my ($hash_parent) = $hash_parents[0];
3136
3137         my $patch_idx = 0;
3138         my $patch_number = 0;
3139         my $patch_line;
3140         my $diffinfo;
3141         my (%from, %to);
3142
3143         print "<div class=\"patchset\">\n";
3144
3145         # skip to first patch
3146         while ($patch_line = <$fd>) {
3147                 chomp $patch_line;
3148
3149                 last if ($patch_line =~ m/^diff /);
3150         }
3151
3152  PATCH:
3153         while ($patch_line) {
3154                 my @diff_header;
3155                 my ($from_id, $to_id);
3156
3157                 # git diff header
3158                 #assert($patch_line =~ m/^diff /) if DEBUG;
3159                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3160                 $patch_number++;
3161                 push @diff_header, $patch_line;
3162
3163                 # extended diff header
3164         EXTENDED_HEADER:
3165                 while ($patch_line = <$fd>) {
3166                         chomp $patch_line;
3167
3168                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3169
3170                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3171                                 $from_id = $1;
3172                                 $to_id   = $2;
3173                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3174                                 $from_id = [ split(',', $1) ];
3175                                 $to_id   = $2;
3176                         }
3177
3178                         push @diff_header, $patch_line;
3179                 }
3180                 my $last_patch_line = $patch_line;
3181
3182                 # check if current patch belong to current raw line
3183                 # and parse raw git-diff line if needed
3184                 if (defined $diffinfo &&
3185                     defined $from_id && defined $to_id &&
3186                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3187                     $diffinfo->{'to_id'} eq $to_id) {
3188                         # this is continuation of a split patch
3189                         print "<div class=\"patch cont\">\n";
3190                 } else {
3191                         # advance raw git-diff output if needed
3192                         $patch_idx++ if defined $diffinfo;
3193
3194                         # compact combined diff output can have some patches skipped
3195                         # find which patch (using pathname of result) we are at now
3196                         my $to_name;
3197                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3198                                 $to_name = $1;
3199                         }
3200
3201                         do {
3202                                 # read and prepare patch information
3203                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3204                                         # pre-parsed (or generated by hand)
3205                                         $diffinfo = $difftree->[$patch_idx];
3206                                 } else {
3207                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3208                                 }
3209
3210                                 # check if current raw line has no patch (it got simplified)
3211                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3212                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3213                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3214                                               "</div>\n";  # class="patch"
3215
3216                                         $patch_idx++;
3217                                         $patch_number++;
3218                                 }
3219                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3220                                  $patch_idx > $#$difftree);
3221
3222                         # modifies %from, %to hashes
3223                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3224
3225                         # this is first patch for raw difftree line with $patch_idx index
3226                         # we index @$difftree array from 0, but number patches from 1
3227                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3228                 }
3229
3230                 # print "git diff" header
3231                 $patch_line = shift @diff_header;
3232                 print format_git_diff_header_line($patch_line, $diffinfo,
3233                                                   \%from, \%to);
3234
3235                 # print extended diff header
3236                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3237         EXTENDED_HEADER:
3238                 foreach $patch_line (@diff_header) {
3239                         print format_extended_diff_header_line($patch_line, $diffinfo,
3240                                                                \%from, \%to);
3241                 }
3242                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3243
3244                 # from-file/to-file diff header
3245                 $patch_line = $last_patch_line;
3246                 if (! $patch_line) {
3247                         print "</div>\n"; # class="patch"
3248                         last PATCH;
3249                 }
3250                 next PATCH if ($patch_line =~ m/^diff /);
3251                 #assert($patch_line =~ m/^---/) if DEBUG;
3252                 #assert($patch_line eq $last_patch_line) if DEBUG;
3253
3254                 $patch_line = <$fd>;
3255                 chomp $patch_line;
3256                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3257
3258                 print format_diff_from_to_header($last_patch_line, $patch_line,
3259                                                  $diffinfo, \%from, \%to,
3260                                                  @hash_parents);
3261
3262                 # the patch itself
3263         LINE:
3264                 while ($patch_line = <$fd>) {
3265                         chomp $patch_line;
3266
3267                         next PATCH if ($patch_line =~ m/^diff /);
3268
3269                         print format_diff_line($patch_line, \%from, \%to);
3270                 }
3271
3272         } continue {
3273                 print "</div>\n"; # class="patch"
3274         }
3275
3276         # for compact combined (--cc) format, with chunk and patch simpliciaction
3277         # patchset might be empty, but there might be unprocessed raw lines
3278         for ($patch_idx++ if $patch_number > 0;
3279              $patch_idx < @$difftree;
3280              $patch_idx++) {
3281                 # read and prepare patch information
3282                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3283                         # pre-parsed (or generated by hand)
3284                         $diffinfo = $difftree->[$patch_idx];
3285                 } else {
3286                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3287                 }
3288
3289                 # generate anchor for "patch" links in difftree / whatchanged part
3290                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3291                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3292                       "</div>\n";  # class="patch"
3293
3294                 $patch_number++;
3295         }
3296
3297         if ($patch_number == 0) {
3298                 if (@hash_parents > 1) {
3299                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3300                 } else {
3301                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3302                 }
3303         }
3304
3305         print "</div>\n"; # class="patchset"
3306 }
3307
3308 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3309
3310 sub git_project_list_body {
3311         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3312
3313         my ($check_forks) = gitweb_check_feature('forks');
3314
3315         my @projects;
3316         foreach my $pr (@$projlist) {
3317                 my (@aa) = git_get_last_activity($pr->{'path'});
3318                 unless (@aa) {
3319                         next;
3320                 }
3321                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3322                 if (!defined $pr->{'descr'}) {
3323                         my $descr = git_get_project_description($pr->{'path'}) || "";
3324                         $pr->{'descr_long'} = to_utf8($descr);
3325                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3326                 }
3327                 if (!defined $pr->{'owner'}) {
3328                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3329                 }
3330                 if ($check_forks) {
3331                         my $pname = $pr->{'path'};
3332                         if (($pname =~ s/\.git$//) &&
3333                             ($pname !~ /\/$/) &&
3334                             (-d "$projectroot/$pname")) {
3335                                 $pr->{'forks'} = "-d $projectroot/$pname";
3336                         }
3337                         else {
3338                                 $pr->{'forks'} = 0;
3339                         }
3340                 }
3341                 push @projects, $pr;
3342         }
3343
3344         $order ||= $default_projects_order;
3345         $from = 0 unless defined $from;
3346         $to = $#projects if (!defined $to || $#projects < $to);
3347
3348         print "<table class=\"project_list\">\n";
3349         unless ($no_header) {
3350                 print "<tr>\n";
3351                 if ($check_forks) {
3352                         print "<th></th>\n";
3353                 }
3354                 if ($order eq "project") {
3355                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3356                         print "<th>Project</th>\n";
3357                 } else {
3358                         print "<th>" .
3359                               $cgi->a({-href => href(project=>undef, order=>'project'),
3360                                        -class => "header"}, "Project") .
3361                               "</th>\n";
3362                 }
3363                 if ($order eq "descr") {
3364                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3365                         print "<th>Description</th>\n";
3366                 } else {
3367                         print "<th>" .
3368                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3369                                        -class => "header"}, "Description") .
3370                               "</th>\n";
3371                 }
3372                 if ($order eq "owner") {
3373                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3374                         print "<th>Owner</th>\n";
3375                 } else {
3376                         print "<th>" .
3377                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3378                                        -class => "header"}, "Owner") .
3379                               "</th>\n";
3380                 }
3381                 if ($order eq "age") {
3382                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3383                         print "<th>Last Change</th>\n";
3384                 } else {
3385                         print "<th>" .
3386                               $cgi->a({-href => href(project=>undef, order=>'age'),
3387                                        -class => "header"}, "Last Change") .
3388                               "</th>\n";
3389                 }
3390                 print "<th></th>\n" .
3391                       "</tr>\n";
3392         }
3393         my $alternate = 1;
3394         for (my $i = $from; $i <= $to; $i++) {
3395                 my $pr = $projects[$i];
3396                 if ($alternate) {
3397                         print "<tr class=\"dark\">\n";
3398                 } else {
3399                         print "<tr class=\"light\">\n";
3400                 }
3401                 $alternate ^= 1;
3402                 if ($check_forks) {
3403                         print "<td>";
3404                         if ($pr->{'forks'}) {
3405                                 print "<!-- $pr->{'forks'} -->\n";
3406                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3407                         }
3408                         print "</td>\n";
3409                 }
3410                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3411                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3412                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3413                                         -class => "list", -title => $pr->{'descr_long'}},
3414                                         esc_html($pr->{'descr'})) . "</td>\n" .
3415                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3416                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3417                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3418                       "<td class=\"link\">" .
3419                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3420                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3421                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3422                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3423                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3424                       "</td>\n" .
3425                       "</tr>\n";
3426         }
3427         if (defined $extra) {
3428                 print "<tr>\n";
3429                 if ($check_forks) {
3430                         print "<td></td>\n";
3431                 }
3432                 print "<td colspan=\"5\">$extra</td>\n" .
3433                       "</tr>\n";
3434         }
3435         print "</table>\n";
3436 }
3437
3438 sub git_shortlog_body {
3439         # uses global variable $project
3440         my ($commitlist, $from, $to, $refs, $extra) = @_;
3441
3442         $from = 0 unless defined $from;
3443         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3444
3445         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3446         my $alternate = 1;
3447         for (my $i = $from; $i <= $to; $i++) {
3448                 my %co = %{$commitlist->[$i]};
3449                 my $commit = $co{'id'};
3450                 my $ref = format_ref_marker($refs, $commit);
3451                 if ($alternate) {
3452                         print "<tr class=\"dark\">\n";
3453                 } else {
3454                         print "<tr class=\"light\">\n";
3455                 }
3456                 $alternate ^= 1;
3457                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3458                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3459                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3460                       "<td><i>" . $author . "</i></td>\n" .
3461                       "<td>";
3462                 print format_subject_html($co{'title'}, $co{'title_short'},
3463                                           href(action=>"commit", hash=>$commit), $ref);
3464                 print "</td>\n" .
3465                       "<td class=\"link\">" .
3466                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3467                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3468                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3469                 my $snapshot_links = format_snapshot_links($commit);
3470                 if (defined $snapshot_links) {
3471                         print " | " . $snapshot_links;
3472                 }
3473                 print "</td>\n" .
3474                       "</tr>\n";
3475         }
3476         if (defined $extra) {
3477                 print "<tr>\n" .
3478                       "<td colspan=\"4\">$extra</td>\n" .
3479                       "</tr>\n";
3480         }
3481         print "</table>\n";
3482 }
3483
3484 sub git_history_body {
3485         # Warning: assumes constant type (blob or tree) during history
3486         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3487
3488         $from = 0 unless defined $from;
3489         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3490
3491         print "<table class=\"history\" cellspacing=\"0\">\n";
3492         my $alternate = 1;
3493         for (my $i = $from; $i <= $to; $i++) {
3494                 my %co = %{$commitlist->[$i]};
3495                 if (!%co) {
3496                         next;
3497                 }
3498                 my $commit = $co{'id'};
3499
3500                 my $ref = format_ref_marker($refs, $commit);
3501
3502                 if ($alternate) {
3503                         print "<tr class=\"dark\">\n";
3504                 } else {
3505                         print "<tr class=\"light\">\n";
3506                 }
3507                 $alternate ^= 1;
3508         # shortlog uses      chop_str($co{'author_name'}, 10)
3509                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3510                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3511                       "<td><i>" . $author . "</i></td>\n" .
3512                       "<td>";
3513                 # originally git_history used chop_str($co{'title'}, 50)
3514                 print format_subject_html($co{'title'}, $co{'title_short'},
3515                                           href(action=>"commit", hash=>$commit), $ref);
3516                 print "</td>\n" .
3517                       "<td class=\"link\">" .
3518                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3519                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3520
3521                 if ($ftype eq 'blob') {
3522                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3523                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3524                         if (defined $blob_current && defined $blob_parent &&
3525                                         $blob_current ne $blob_parent) {
3526                                 print " | " .
3527                                         $cgi->a({-href => href(action=>"blobdiff",
3528                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3529                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3530                                                                file_name=>$file_name)},
3531                                                 "diff to current");
3532                         }
3533                 }
3534                 print "</td>\n" .
3535                       "</tr>\n";
3536         }
3537         if (defined $extra) {
3538                 print "<tr>\n" .
3539                       "<td colspan=\"4\">$extra</td>\n" .
3540                       "</tr>\n";
3541         }
3542         print "</table>\n";
3543 }
3544
3545 sub git_tags_body {
3546         # uses global variable $project
3547         my ($taglist, $from, $to, $extra) = @_;
3548         $from = 0 unless defined $from;
3549         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3550
3551         print "<table class=\"tags\" cellspacing=\"0\">\n";
3552         my $alternate = 1;
3553         for (my $i = $from; $i <= $to; $i++) {
3554                 my $entry = $taglist->[$i];
3555                 my %tag = %$entry;
3556                 my $comment = $tag{'subject'};
3557                 my $comment_short;
3558                 if (defined $comment) {
3559                         $comment_short = chop_str($comment, 30, 5);
3560                 }
3561                 if ($alternate) {
3562                         print "<tr class=\"dark\">\n";
3563                 } else {
3564                         print "<tr class=\"light\">\n";
3565                 }
3566                 $alternate ^= 1;
3567                 if (defined $tag{'age'}) {
3568                         print "<td><i>$tag{'age'}</i></td>\n";
3569                 } else {
3570                         print "<td></td>\n";
3571                 }
3572                 print "<td>" .
3573                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3574                                -class => "list name"}, esc_html($tag{'name'})) .
3575                       "</td>\n" .
3576                       "<td>";
3577                 if (defined $comment) {
3578                         print format_subject_html($comment, $comment_short,
3579                                                   href(action=>"tag", hash=>$tag{'id'}));
3580                 }
3581                 print "</td>\n" .
3582                       "<td class=\"selflink\">";
3583                 if ($tag{'type'} eq "tag") {
3584                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3585                 } else {
3586                         print "&nbsp;";
3587                 }
3588                 print "</td>\n" .
3589                       "<td class=\"link\">" . " | " .
3590                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3591                 if ($tag{'reftype'} eq "commit") {
3592                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3593                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3594                 } elsif ($tag{'reftype'} eq "blob") {
3595                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3596                 }
3597                 print "</td>\n" .
3598                       "</tr>";
3599         }
3600         if (defined $extra) {
3601                 print "<tr>\n" .
3602                       "<td colspan=\"5\">$extra</td>\n" .
3603                       "</tr>\n";
3604         }
3605         print "</table>\n";
3606 }
3607
3608 sub git_heads_body {
3609         # uses global variable $project
3610         my ($headlist, $head, $from, $to, $extra) = @_;
3611         $from = 0 unless defined $from;
3612         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3613
3614         print "<table class=\"heads\" cellspacing=\"0\">\n";
3615         my $alternate = 1;
3616         for (my $i = $from; $i <= $to; $i++) {
3617                 my $entry = $headlist->[$i];
3618                 my %ref = %$entry;
3619                 my $curr = $ref{'id'} eq $head;
3620                 if ($alternate) {
3621                         print "<tr class=\"dark\">\n";
3622                 } else {
3623                         print "<tr class=\"light\">\n";
3624                 }
3625                 $alternate ^= 1;
3626                 print "<td><i>$ref{'age'}</i></td>\n" .
3627                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3628                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3629                                -class => "list name"},esc_html($ref{'name'})) .
3630                       "</td>\n" .
3631                       "<td class=\"link\">" .
3632                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3633                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3634                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3635                       "</td>\n" .
3636                       "</tr>";
3637         }
3638         if (defined $extra) {
3639                 print "<tr>\n" .
3640                       "<td colspan=\"3\">$extra</td>\n" .
3641                       "</tr>\n";
3642         }
3643         print "</table>\n";
3644 }
3645
3646 sub git_search_grep_body {
3647         my ($commitlist, $from, $to, $extra) = @_;
3648         $from = 0 unless defined $from;
3649         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3650
3651         print "<table class=\"grep\" cellspacing=\"0\">\n";
3652         my $alternate = 1;
3653         for (my $i = $from; $i <= $to; $i++) {
3654                 my %co = %{$commitlist->[$i]};
3655                 if (!%co) {
3656                         next;
3657                 }
3658                 my $commit = $co{'id'};
3659                 if ($alternate) {
3660                         print "<tr class=\"dark\">\n";
3661                 } else {
3662                         print "<tr class=\"light\">\n";
3663                 }
3664                 $alternate ^= 1;
3665                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3666                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3667                       "<td><i>" . $author . "</i></td>\n" .
3668                       "<td>" .
3669                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3670                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3671                 my $comment = $co{'comment'};
3672                 foreach my $line (@$comment) {
3673                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3674                                 my $lead = esc_html($1) || "";
3675                                 $lead = chop_str($lead, 30, 10);
3676                                 my $match = esc_html($2) || "";
3677                                 my $trail = esc_html($3) || "";
3678                                 $trail = chop_str($trail, 30, 10);
3679                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3680                                 print chop_str($text, 80, 5) . "<br/>\n";
3681                         }
3682                 }
3683                 print "</td>\n" .
3684                       "<td class=\"link\">" .
3685                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3686                       " | " .
3687                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3688                 print "</td>\n" .
3689                       "</tr>\n";
3690         }
3691         if (defined $extra) {
3692                 print "<tr>\n" .
3693                       "<td colspan=\"3\">$extra</td>\n" .
3694                       "</tr>\n";
3695         }
3696         print "</table>\n";
3697 }
3698
3699 ## ======================================================================
3700 ## ======================================================================
3701 ## actions
3702
3703 sub git_project_list {
3704         my $order = $cgi->param('o');
3705         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3706                 die_error(undef, "Unknown order parameter");
3707         }
3708
3709         my @list = git_get_projects_list();
3710         if (!@list) {
3711                 die_error(undef, "No projects found");
3712         }
3713
3714         git_header_html();
3715         if (-f $home_text) {
3716                 print "<div class=\"index_include\">\n";
3717                 open (my $fd, $home_text);
3718                 print <$fd>;
3719                 close $fd;
3720                 print "</div>\n";
3721         }
3722         git_project_list_body(\@list, $order);
3723         git_footer_html();
3724 }
3725
3726 sub git_forks {
3727         my $order = $cgi->param('o');
3728         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3729                 die_error(undef, "Unknown order parameter");
3730         }
3731
3732         my @list = git_get_projects_list($project);
3733         if (!@list) {
3734                 die_error(undef, "No forks found");
3735         }
3736
3737         git_header_html();
3738         git_print_page_nav('','');
3739         git_print_header_div('summary', "$project forks");
3740         git_project_list_body(\@list, $order);
3741         git_footer_html();
3742 }
3743
3744 sub git_project_index {
3745         my @projects = git_get_projects_list($project);
3746
3747         print $cgi->header(
3748                 -type => 'text/plain',
3749                 -charset => 'utf-8',
3750                 -content_disposition => 'inline; filename="index.aux"');
3751
3752         foreach my $pr (@projects) {
3753                 if (!exists $pr->{'owner'}) {
3754                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3755                 }
3756
3757                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3758                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3759                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3760                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3761                 $path  =~ s/ /\+/g;
3762                 $owner =~ s/ /\+/g;
3763
3764                 print "$path $owner\n";
3765         }
3766 }
3767
3768 sub git_summary {
3769         my $descr = git_get_project_description($project) || "none";
3770         my %co = parse_commit("HEAD");
3771         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3772         my $head = $co{'id'};
3773
3774         my $owner = git_get_project_owner($project);
3775
3776         my $refs = git_get_references();
3777         # These get_*_list functions return one more to allow us to see if
3778         # there are more ...
3779         my @taglist  = git_get_tags_list(16);
3780         my @headlist = git_get_heads_list(16);
3781         my @forklist;
3782         my ($check_forks) = gitweb_check_feature('forks');
3783
3784         if ($check_forks) {
3785                 @forklist = git_get_projects_list($project);
3786         }
3787
3788         git_header_html();
3789         git_print_page_nav('summary','', $head);
3790
3791         print "<div class=\"title\">&nbsp;</div>\n";
3792         print "<table cellspacing=\"0\">\n" .
3793               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3794               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3795         if (defined $cd{'rfc2822'}) {
3796                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3797         }
3798
3799         # use per project git URL list in $projectroot/$project/cloneurl
3800         # or make project git URL from git base URL and project name
3801         my $url_tag = "URL";
3802         my @url_list = git_get_project_url_list($project);
3803         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3804         foreach my $git_url (@url_list) {
3805                 next unless $git_url;
3806                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3807                 $url_tag = "";
3808         }
3809         print "</table>\n";
3810
3811         if (-s "$projectroot/$project/README.html") {
3812                 if (open my $fd, "$projectroot/$project/README.html") {
3813                         print "<div class=\"title\">readme</div>\n";
3814                         print $_ while (<$fd>);
3815                         close $fd;
3816                 }
3817         }
3818
3819         # we need to request one more than 16 (0..15) to check if
3820         # those 16 are all
3821         my @commitlist = $head ? parse_commits($head, 17) : ();
3822         if (@commitlist) {
3823                 git_print_header_div('shortlog');
3824                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3825                                   $#commitlist <=  15 ? undef :
3826                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3827         }
3828
3829         if (@taglist) {
3830                 git_print_header_div('tags');
3831                 git_tags_body(\@taglist, 0, 15,
3832                               $#taglist <=  15 ? undef :
3833                               $cgi->a({-href => href(action=>"tags")}, "..."));
3834         }
3835
3836         if (@headlist) {
3837                 git_print_header_div('heads');
3838                 git_heads_body(\@headlist, $head, 0, 15,
3839                                $#headlist <= 15 ? undef :
3840                                $cgi->a({-href => href(action=>"heads")}, "..."));
3841         }
3842
3843         if (@forklist) {
3844                 git_print_header_div('forks');
3845                 git_project_list_body(\@forklist, undef, 0, 15,
3846                                       $#forklist <= 15 ? undef :
3847                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3848                                       'noheader');
3849         }
3850
3851         git_footer_html();
3852 }
3853
3854 sub git_tag {
3855         my $head = git_get_head_hash($project);
3856         git_header_html();
3857         git_print_page_nav('','', $head,undef,$head);
3858         my %tag = parse_tag($hash);
3859
3860         if (! %tag) {
3861                 die_error(undef, "Unknown tag object");
3862         }
3863
3864         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3865         print "<div class=\"title_text\">\n" .
3866               "<table cellspacing=\"0\">\n" .
3867               "<tr>\n" .
3868               "<td>object</td>\n" .
3869               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3870                                $tag{'object'}) . "</td>\n" .
3871               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3872                                               $tag{'type'}) . "</td>\n" .
3873               "</tr>\n";
3874         if (defined($tag{'author'})) {
3875                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3876                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3877                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3878                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3879                         "</td></tr>\n";
3880         }
3881         print "</table>\n\n" .
3882               "</div>\n";
3883         print "<div class=\"page_body\">";
3884         my $comment = $tag{'comment'};
3885         foreach my $line (@$comment) {
3886                 chomp $line;
3887                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3888         }
3889         print "</div>\n";
3890         git_footer_html();
3891 }
3892
3893 sub git_blame2 {
3894         my $fd;
3895         my $ftype;
3896
3897         my ($have_blame) = gitweb_check_feature('blame');
3898         if (!$have_blame) {
3899                 die_error('403 Permission denied', "Permission denied");
3900         }
3901         die_error('404 Not Found', "File name not defined") if (!$file_name);
3902         $hash_base ||= git_get_head_hash($project);
3903         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3904         my %co = parse_commit($hash_base)
3905                 or die_error(undef, "Reading commit failed");
3906         if (!defined $hash) {
3907                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3908                         or die_error(undef, "Error looking up file");
3909         }
3910         $ftype = git_get_type($hash);
3911         if ($ftype !~ "blob") {
3912                 die_error('400 Bad Request', "Object is not a blob");
3913         }
3914         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3915               $file_name, $hash_base)
3916                 or die_error(undef, "Open git-blame failed");
3917         git_header_html();
3918         my $formats_nav =
3919                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3920                         "blob") .
3921                 " | " .
3922                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3923                         "history") .
3924                 " | " .
3925                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3926                         "HEAD");
3927         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3928         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3929         git_print_page_path($file_name, $ftype, $hash_base);
3930         my @rev_color = (qw(light2 dark2));
3931         my $num_colors = scalar(@rev_color);
3932         my $current_color = 0;
3933         my $last_rev;
3934         print <<HTML;
3935 <div class="page_body">
3936 <table class="blame">
3937 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3938 HTML
3939         my %metainfo = ();
3940         while (1) {
3941                 $_ = <$fd>;
3942                 last unless defined $_;
3943                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3944                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3945                 if (!exists $metainfo{$full_rev}) {
3946                         $metainfo{$full_rev} = {};
3947                 }
3948                 my $meta = $metainfo{$full_rev};
3949                 while (<$fd>) {
3950                         last if (s/^\t//);
3951                         if (/^(\S+) (.*)$/) {
3952                                 $meta->{$1} = $2;
3953                         }
3954                 }
3955                 my $data = $_;
3956                 chomp $data;
3957                 my $rev = substr($full_rev, 0, 8);
3958                 my $author = $meta->{'author'};
3959                 my %date = parse_date($meta->{'author-time'},
3960                                       $meta->{'author-tz'});
3961                 my $date = $date{'iso-tz'};
3962                 if ($group_size) {
3963                         $current_color = ++$current_color % $num_colors;
3964                 }
3965                 print "<tr class=\"$rev_color[$current_color]\">\n";
3966                 if ($group_size) {
3967                         print "<td class=\"sha1\"";
3968                         print " title=\"". esc_html($author) . ", $date\"";
3969                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3970                         print ">";
3971                         print $cgi->a({-href => href(action=>"commit",
3972                                                      hash=>$full_rev,
3973                                                      file_name=>$file_name)},
3974                                       esc_html($rev));
3975                         print "</td>\n";
3976                 }
3977                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3978                         or die_error(undef, "Open git-rev-parse failed");
3979                 my $parent_commit = <$dd>;
3980                 close $dd;
3981                 chomp($parent_commit);
3982                 my $blamed = href(action => 'blame',
3983                                   file_name => $meta->{'filename'},
3984                                   hash_base => $parent_commit);
3985                 print "<td class=\"linenr\">";
3986                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3987                                 -id => "l$lineno",
3988                                 -class => "linenr" },
3989                               esc_html($lineno));
3990                 print "</td>";
3991                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3992                 print "</tr>\n";
3993         }
3994         print "</table>\n";
3995         print "</div>";
3996         close $fd
3997                 or print "Reading blob failed\n";
3998         git_footer_html();
3999 }
4000
4001 sub git_blame {
4002         my $fd;
4003
4004         my ($have_blame) = gitweb_check_feature('blame');
4005         if (!$have_blame) {
4006                 die_error('403 Permission denied', "Permission denied");
4007         }
4008         die_error('404 Not Found', "File name not defined") if (!$file_name);
4009         $hash_base ||= git_get_head_hash($project);
4010         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4011         my %co = parse_commit($hash_base)
4012                 or die_error(undef, "Reading commit failed");
4013         if (!defined $hash) {
4014                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4015                         or die_error(undef, "Error lookup file");
4016         }
4017         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4018                 or die_error(undef, "Open git-annotate failed");
4019         git_header_html();
4020         my $formats_nav =
4021                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4022                         "blob") .
4023                 " | " .
4024                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4025                         "history") .
4026                 " | " .
4027                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4028                         "HEAD");
4029         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4030         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4031         git_print_page_path($file_name, 'blob', $hash_base);
4032         print "<div class=\"page_body\">\n";
4033         print <<HTML;
4034 <table class="blame">
4035   <tr>
4036     <th>Commit</th>
4037     <th>Age</th>
4038     <th>Author</th>
4039     <th>Line</th>
4040     <th>Data</th>
4041   </tr>
4042 HTML
4043         my @line_class = (qw(light dark));
4044         my $line_class_len = scalar (@line_class);
4045         my $line_class_num = $#line_class;
4046         while (my $line = <$fd>) {
4047                 my $long_rev;
4048                 my $short_rev;
4049                 my $author;
4050                 my $time;
4051                 my $lineno;
4052                 my $data;
4053                 my $age;
4054                 my $age_str;
4055                 my $age_class;
4056
4057                 chomp $line;
4058                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4059
4060                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4061                         $long_rev = $1;
4062                         $author   = $2;
4063                         $time     = $3;
4064                         $lineno   = $4;
4065                         $data     = $5;
4066                 } else {
4067                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4068                         next;
4069                 }
4070                 $short_rev  = substr ($long_rev, 0, 8);
4071                 $age        = time () - $time;
4072                 $age_str    = age_string ($age);
4073                 $age_str    =~ s/ /&nbsp;/g;
4074                 $age_class  = age_class($age);
4075                 $author     = esc_html ($author);
4076                 $author     =~ s/ /&nbsp;/g;
4077
4078                 $data = untabify($data);
4079                 $data = esc_html ($data);
4080
4081                 print <<HTML;
4082   <tr class="$line_class[$line_class_num]">
4083     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4084     <td class="$age_class">$age_str</td>
4085     <td>$author</td>
4086     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4087     <td class="pre">$data</td>
4088   </tr>
4089 HTML
4090         } # while (my $line = <$fd>)
4091         print "</table>\n\n";
4092         close $fd
4093                 or print "Reading blob failed.\n";
4094         print "</div>";
4095         git_footer_html();
4096 }
4097
4098 sub git_tags {
4099         my $head = git_get_head_hash($project);
4100         git_header_html();
4101         git_print_page_nav('','', $head,undef,$head);
4102         git_print_header_div('summary', $project);
4103
4104         my @tagslist = git_get_tags_list();
4105         if (@tagslist) {
4106                 git_tags_body(\@tagslist);
4107         }
4108         git_footer_html();
4109 }
4110
4111 sub git_heads {
4112         my $head = git_get_head_hash($project);
4113         git_header_html();
4114         git_print_page_nav('','', $head,undef,$head);
4115         git_print_header_div('summary', $project);
4116
4117         my @headslist = git_get_heads_list();
4118         if (@headslist) {
4119                 git_heads_body(\@headslist, $head);
4120         }
4121         git_footer_html();
4122 }
4123
4124 sub git_blob_plain {
4125         my $expires;
4126
4127         if (!defined $hash) {
4128                 if (defined $file_name) {
4129                         my $base = $hash_base || git_get_head_hash($project);
4130                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4131                                 or die_error(undef, "Error lookup file");
4132                 } else {
4133                         die_error(undef, "No file name defined");
4134                 }
4135         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4136                 # blobs defined by non-textual hash id's can be cached
4137                 $expires = "+1d";
4138         }
4139
4140         my $type = shift;
4141         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4142                 or die_error(undef, "Couldn't cat $file_name, $hash");
4143
4144         $type ||= blob_mimetype($fd, $file_name);
4145
4146         # save as filename, even when no $file_name is given
4147         my $save_as = "$hash";
4148         if (defined $file_name) {
4149                 $save_as = $file_name;
4150         } elsif ($type =~ m/^text\//) {
4151                 $save_as .= '.txt';
4152         }
4153
4154         print $cgi->header(
4155                 -type => "$type",
4156                 -expires=>$expires,
4157                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4158         undef $/;
4159         binmode STDOUT, ':raw';
4160         print <$fd>;
4161         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4162         $/ = "\n";
4163         close $fd;
4164 }
4165
4166 sub git_blob {
4167         my $expires;
4168
4169         if (!defined $hash) {
4170                 if (defined $file_name) {
4171                         my $base = $hash_base || git_get_head_hash($project);
4172                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4173                                 or die_error(undef, "Error lookup file");
4174                 } else {
4175                         die_error(undef, "No file name defined");
4176                 }
4177         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4178                 # blobs defined by non-textual hash id's can be cached
4179                 $expires = "+1d";
4180         }
4181
4182         my ($have_blame) = gitweb_check_feature('blame');
4183         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4184                 or die_error(undef, "Couldn't cat $file_name, $hash");
4185         my $mimetype = blob_mimetype($fd, $file_name);
4186         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4187                 close $fd;
4188                 return git_blob_plain($mimetype);
4189         }
4190         # we can have blame only for text/* mimetype
4191         $have_blame &&= ($mimetype =~ m!^text/!);
4192
4193         git_header_html(undef, $expires);
4194         my $formats_nav = '';
4195         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4196                 if (defined $file_name) {
4197                         if ($have_blame) {
4198                                 $formats_nav .=
4199                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4200                                                                hash=>$hash, file_name=>$file_name)},
4201                                                 "blame") .
4202                                         " | ";
4203                         }
4204                         $formats_nav .=
4205                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4206                                                        hash=>$hash, file_name=>$file_name)},
4207                                         "history") .
4208                                 " | " .
4209                                 $cgi->a({-href => href(action=>"blob_plain",
4210                                                        hash=>$hash, file_name=>$file_name)},
4211                                         "raw") .
4212                                 " | " .
4213                                 $cgi->a({-href => href(action=>"blob",
4214                                                        hash_base=>"HEAD", file_name=>$file_name)},
4215                                         "HEAD");
4216                 } else {
4217                         $formats_nav .=
4218                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4219                 }
4220                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4221                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4222         } else {
4223                 print "<div class=\"page_nav\">\n" .
4224                       "<br/><br/></div>\n" .
4225                       "<div class=\"title\">$hash</div>\n";
4226         }
4227         git_print_page_path($file_name, "blob", $hash_base);
4228         print "<div class=\"page_body\">\n";
4229         if ($mimetype =~ m!^text/!) {
4230                 my $nr;
4231                 while (my $line = <$fd>) {
4232                         chomp $line;
4233                         $nr++;
4234                         $line = untabify($line);
4235                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4236                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4237                 }
4238         } elsif ($mimetype =~ m!^image/!) {
4239                 print qq!<img type="$mimetype"!;
4240                 if ($file_name) {
4241                         print qq! alt="$file_name" title="$file_name"!;
4242                 }
4243                 print qq! src="! .
4244                       href(action=>"blob_plain", hash=>$hash,
4245                            hash_base=>$hash_base, file_name=>$file_name) .
4246                       qq!" />\n!;
4247         }
4248         close $fd
4249                 or print "Reading blob failed.\n";
4250         print "</div>";
4251         git_footer_html();
4252 }
4253
4254 sub git_tree {
4255         if (!defined $hash_base) {
4256                 $hash_base = "HEAD";
4257         }
4258         if (!defined $hash) {
4259                 if (defined $file_name) {
4260                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4261                 } else {
4262                         $hash = $hash_base;
4263                 }
4264         }
4265         $/ = "\0";
4266         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4267                 or die_error(undef, "Open git-ls-tree failed");
4268         my @entries = map { chomp; $_ } <$fd>;
4269         close $fd or die_error(undef, "Reading tree failed");
4270         $/ = "\n";
4271
4272         my $refs = git_get_references();
4273         my $ref = format_ref_marker($refs, $hash_base);
4274         git_header_html();
4275         my $basedir = '';
4276         my ($have_blame) = gitweb_check_feature('blame');
4277         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4278                 my @views_nav = ();
4279                 if (defined $file_name) {
4280                         push @views_nav,
4281                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4282                                                        hash=>$hash, file_name=>$file_name)},
4283                                         "history"),
4284                                 $cgi->a({-href => href(action=>"tree",
4285                                                        hash_base=>"HEAD", file_name=>$file_name)},
4286                                         "HEAD"),
4287                 }
4288                 my $snapshot_links = format_snapshot_links($hash);
4289                 if (defined $snapshot_links) {
4290                         # FIXME: Should be available when we have no hash base as well.
4291                         push @views_nav, $snapshot_links;
4292                 }
4293                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4294                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4295         } else {
4296                 undef $hash_base;
4297                 print "<div class=\"page_nav\">\n";
4298                 print "<br/><br/></div>\n";
4299                 print "<div class=\"title\">$hash</div>\n";
4300         }
4301         if (defined $file_name) {
4302                 $basedir = $file_name;
4303                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4304                         $basedir .= '/';
4305                 }
4306         }
4307         git_print_page_path($file_name, 'tree', $hash_base);
4308         print "<div class=\"page_body\">\n";
4309         print "<table cellspacing=\"0\">\n";
4310         my $alternate = 1;
4311         # '..' (top directory) link if possible
4312         if (defined $hash_base &&
4313             defined $file_name && $file_name =~ m![^/]+$!) {
4314                 if ($alternate) {
4315                         print "<tr class=\"dark\">\n";
4316                 } else {
4317                         print "<tr class=\"light\">\n";
4318                 }
4319                 $alternate ^= 1;
4320
4321                 my $up = $file_name;
4322                 $up =~ s!/?[^/]+$!!;
4323                 undef $up unless $up;
4324                 # based on git_print_tree_entry
4325                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4326                 print '<td class="list">';
4327                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4328                                              file_name=>$up)},
4329                               "..");
4330                 print "</td>\n";
4331                 print "<td class=\"link\"></td>\n";
4332
4333                 print "</tr>\n";
4334         }
4335         foreach my $line (@entries) {
4336                 my %t = parse_ls_tree_line($line, -z => 1);
4337
4338                 if ($alternate) {
4339                         print "<tr class=\"dark\">\n";
4340                 } else {
4341                         print "<tr class=\"light\">\n";
4342                 }
4343                 $alternate ^= 1;
4344
4345                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4346
4347                 print "</tr>\n";
4348         }
4349         print "</table>\n" .
4350               "</div>";
4351         git_footer_html();
4352 }
4353
4354 sub git_snapshot {
4355         my @supported_fmts = gitweb_check_feature('snapshot');
4356         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4357
4358         my $format = $cgi->param('sf');
4359         if (!@supported_fmts) {
4360                 die_error('403 Permission denied', "Permission denied");
4361         }
4362         # default to first supported snapshot format
4363         $format ||= $supported_fmts[0];
4364         if ($format !~ m/^[a-z0-9]+$/) {
4365                 die_error(undef, "Invalid snapshot format parameter");
4366         } elsif (!exists($known_snapshot_formats{$format})) {
4367                 die_error(undef, "Unknown snapshot format");
4368         } elsif (!grep($_ eq $format, @supported_fmts)) {
4369                 die_error(undef, "Unsupported snapshot format");
4370         }
4371
4372         if (!defined $hash) {
4373                 $hash = git_get_head_hash($project);
4374         }
4375
4376         my $git_command = git_cmd_str();
4377         my $name = $project;
4378         $name =~ s,([^/])/*\.git$,$1,;
4379         $name = basename($name);
4380         my $filename = to_utf8($name);
4381         $name =~ s/\047/\047\\\047\047/g;
4382         my $cmd;
4383         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4384         $cmd = "$git_command archive " .
4385                 "--format=$known_snapshot_formats{$format}{'format'} " .
4386                 "--prefix=\'$name\'/ $hash";
4387         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4388                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4389         }
4390
4391         print $cgi->header(
4392                 -type => $known_snapshot_formats{$format}{'type'},
4393                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4394                 -status => '200 OK');
4395
4396         open my $fd, "-|", $cmd
4397                 or die_error(undef, "Execute git-archive failed");
4398         binmode STDOUT, ':raw';
4399         print <$fd>;
4400         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4401         close $fd;
4402 }
4403
4404 sub git_log {
4405         my $head = git_get_head_hash($project);
4406         if (!defined $hash) {
4407                 $hash = $head;
4408         }
4409         if (!defined $page) {
4410                 $page = 0;
4411         }
4412         my $refs = git_get_references();
4413
4414         my @commitlist = parse_commits($hash, 101, (100 * $page));
4415
4416         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4417
4418         git_header_html();
4419         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4420
4421         if (!@commitlist) {
4422                 my %co = parse_commit($hash);
4423
4424                 git_print_header_div('summary', $project);
4425                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4426         }
4427         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4428         for (my $i = 0; $i <= $to; $i++) {
4429                 my %co = %{$commitlist[$i]};
4430                 next if !%co;
4431                 my $commit = $co{'id'};
4432                 my $ref = format_ref_marker($refs, $commit);
4433                 my %ad = parse_date($co{'author_epoch'});
4434                 git_print_header_div('commit',
4435                                "<span class=\"age\">$co{'age_string'}</span>" .
4436                                esc_html($co{'title'}) . $ref,
4437                                $commit);
4438                 print "<div class=\"title_text\">\n" .
4439                       "<div class=\"log_link\">\n" .
4440                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4441                       " | " .
4442                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4443                       " | " .
4444                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4445                       "<br/>\n" .
4446                       "</div>\n" .
4447                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4448                       "</div>\n";
4449
4450                 print "<div class=\"log_body\">\n";
4451                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4452                 print "</div>\n";
4453         }
4454         if ($#commitlist >= 100) {
4455                 print "<div class=\"page_nav\">\n";
4456                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4457                                -accesskey => "n", -title => "Alt-n"}, "next");
4458                 print "</div>\n";
4459         }
4460         git_footer_html();
4461 }
4462
4463 sub git_commit {
4464         $hash ||= $hash_base || "HEAD";
4465         my %co = parse_commit($hash);
4466         if (!%co) {
4467                 die_error(undef, "Unknown commit object");
4468         }
4469         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4470         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4471
4472         my $parent  = $co{'parent'};
4473         my $parents = $co{'parents'}; # listref
4474
4475         # we need to prepare $formats_nav before any parameter munging
4476         my $formats_nav;
4477         if (!defined $parent) {
4478                 # --root commitdiff
4479                 $formats_nav .= '(initial)';
4480         } elsif (@$parents == 1) {
4481                 # single parent commit
4482                 $formats_nav .=
4483                         '(parent: ' .
4484                         $cgi->a({-href => href(action=>"commit",
4485                                                hash=>$parent)},
4486                                 esc_html(substr($parent, 0, 7))) .
4487                         ')';
4488         } else {
4489                 # merge commit
4490                 $formats_nav .=
4491                         '(merge: ' .
4492                         join(' ', map {
4493                                 $cgi->a({-href => href(action=>"commit",
4494                                                        hash=>$_)},
4495                                         esc_html(substr($_, 0, 7)));
4496                         } @$parents ) .
4497                         ')';
4498         }
4499
4500         if (!defined $parent) {
4501                 $parent = "--root";
4502         }
4503         my @difftree;
4504         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4505                 @diff_opts,
4506                 (@$parents <= 1 ? $parent : '-c'),
4507                 $hash, "--"
4508                 or die_error(undef, "Open git-diff-tree failed");
4509         @difftree = map { chomp; $_ } <$fd>;
4510         close $fd or die_error(undef, "Reading git-diff-tree failed");
4511
4512         # non-textual hash id's can be cached
4513         my $expires;
4514         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4515                 $expires = "+1d";
4516         }
4517         my $refs = git_get_references();
4518         my $ref = format_ref_marker($refs, $co{'id'});
4519
4520         git_header_html(undef, $expires);
4521         git_print_page_nav('commit', '',
4522                            $hash, $co{'tree'}, $hash,
4523                            $formats_nav);
4524
4525         if (defined $co{'parent'}) {
4526                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4527         } else {
4528                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4529         }
4530         print "<div class=\"title_text\">\n" .
4531               "<table cellspacing=\"0\">\n";
4532         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4533               "<tr>" .
4534               "<td></td><td> $ad{'rfc2822'}";
4535         if ($ad{'hour_local'} < 6) {
4536                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4537                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4538         } else {
4539                 printf(" (%02d:%02d %s)",
4540                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4541         }
4542         print "</td>" .
4543               "</tr>\n";
4544         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4545         print "<tr><td></td><td> $cd{'rfc2822'}" .
4546               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4547               "</td></tr>\n";
4548         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4549         print "<tr>" .
4550               "<td>tree</td>" .
4551               "<td class=\"sha1\">" .
4552               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4553                        class => "list"}, $co{'tree'}) .
4554               "</td>" .
4555               "<td class=\"link\">" .
4556               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4557                       "tree");
4558         my $snapshot_links = format_snapshot_links($hash);
4559         if (defined $snapshot_links) {
4560                 print " | " . $snapshot_links;
4561         }
4562         print "</td>" .
4563               "</tr>\n";
4564
4565         foreach my $par (@$parents) {
4566                 print "<tr>" .
4567                       "<td>parent</td>" .
4568                       "<td class=\"sha1\">" .
4569                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4570                                class => "list"}, $par) .
4571                       "</td>" .
4572                       "<td class=\"link\">" .
4573                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4574                       " | " .
4575                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4576                       "</td>" .
4577                       "</tr>\n";
4578         }
4579         print "</table>".
4580               "</div>\n";
4581
4582         print "<div class=\"page_body\">\n";
4583         git_print_log($co{'comment'});
4584         print "</div>\n";
4585
4586         git_difftree_body(\@difftree, $hash, @$parents);
4587
4588         git_footer_html();
4589 }
4590
4591 sub git_object {
4592         # object is defined by:
4593         # - hash or hash_base alone
4594         # - hash_base and file_name
4595         my $type;
4596
4597         # - hash or hash_base alone
4598         if ($hash || ($hash_base && !defined $file_name)) {
4599                 my $object_id = $hash || $hash_base;
4600
4601                 my $git_command = git_cmd_str();
4602                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4603                         or die_error('404 Not Found', "Object does not exist");
4604                 $type = <$fd>;
4605                 chomp $type;
4606                 close $fd
4607                         or die_error('404 Not Found', "Object does not exist");
4608
4609         # - hash_base and file_name
4610         } elsif ($hash_base && defined $file_name) {
4611                 $file_name =~ s,/+$,,;
4612
4613                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4614                         or die_error('404 Not Found', "Base object does not exist");
4615
4616                 # here errors should not hapen
4617                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4618                         or die_error(undef, "Open git-ls-tree failed");
4619                 my $line = <$fd>;
4620                 close $fd;
4621
4622                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4623                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4624                         die_error('404 Not Found', "File or directory for given base does not exist");
4625                 }
4626                 $type = $2;
4627                 $hash = $3;
4628         } else {
4629                 die_error('404 Not Found', "Not enough information to find object");
4630         }
4631
4632         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4633                                           hash=>$hash, hash_base=>$hash_base,
4634                                           file_name=>$file_name),
4635                              -status => '302 Found');
4636 }
4637
4638 sub git_blobdiff {
4639         my $format = shift || 'html';
4640
4641         my $fd;
4642         my @difftree;
4643         my %diffinfo;
4644         my $expires;
4645
4646         # preparing $fd and %diffinfo for git_patchset_body
4647         # new style URI
4648         if (defined $hash_base && defined $hash_parent_base) {
4649                 if (defined $file_name) {
4650                         # read raw output
4651                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4652                                 $hash_parent_base, $hash_base,
4653                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4654                                 or die_error(undef, "Open git-diff-tree failed");
4655                         @difftree = 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                 } elsif (defined $hash &&
4662                          $hash =~ /[0-9a-fA-F]{40}/) {
4663                         # try to find filename from $hash
4664
4665                         # read filtered raw output
4666                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4667                                 $hash_parent_base, $hash_base, "--"
4668                                 or die_error(undef, "Open git-diff-tree failed");
4669                         @difftree =
4670                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4671                                 # $hash == to_id
4672                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4673                                 map { chomp; $_ } <$fd>;
4674                         close $fd
4675                                 or die_error(undef, "Reading git-diff-tree failed");
4676                         @difftree
4677                                 or die_error('404 Not Found', "Blob diff not found");
4678
4679                 } else {
4680                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4681                 }
4682
4683                 if (@difftree > 1) {
4684                         die_error('404 Not Found', "Ambiguous blob diff specification");
4685                 }
4686
4687                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4688                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4689                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4690
4691                 $hash_parent ||= $diffinfo{'from_id'};
4692                 $hash        ||= $diffinfo{'to_id'};
4693
4694                 # non-textual hash id's can be cached
4695                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4696                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4697                         $expires = '+1d';
4698                 }
4699
4700                 # open patch output
4701                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4702                         '-p', ($format eq 'html' ? "--full-index" : ()),
4703                         $hash_parent_base, $hash_base,
4704                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4705                         or die_error(undef, "Open git-diff-tree failed");
4706         }
4707
4708         # old/legacy style URI
4709         if (!%diffinfo && # if new style URI failed
4710             defined $hash && defined $hash_parent) {
4711                 # fake git-diff-tree raw output
4712                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4713                 $diffinfo{'from_id'} = $hash_parent;
4714                 $diffinfo{'to_id'}   = $hash;
4715                 if (defined $file_name) {
4716                         if (defined $file_parent) {
4717                                 $diffinfo{'status'} = '2';
4718                                 $diffinfo{'from_file'} = $file_parent;
4719                                 $diffinfo{'to_file'}   = $file_name;
4720                         } else { # assume not renamed
4721                                 $diffinfo{'status'} = '1';
4722                                 $diffinfo{'from_file'} = $file_name;
4723                                 $diffinfo{'to_file'}   = $file_name;
4724                         }
4725                 } else { # no filename given
4726                         $diffinfo{'status'} = '2';
4727                         $diffinfo{'from_file'} = $hash_parent;
4728                         $diffinfo{'to_file'}   = $hash;
4729                 }
4730
4731                 # non-textual hash id's can be cached
4732                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4733                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4734                         $expires = '+1d';
4735                 }
4736
4737                 # open patch output
4738                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4739                         '-p', ($format eq 'html' ? "--full-index" : ()),
4740                         $hash_parent, $hash, "--"
4741                         or die_error(undef, "Open git-diff failed");
4742         } else  {
4743                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4744                         unless %diffinfo;
4745         }
4746
4747         # header
4748         if ($format eq 'html') {
4749                 my $formats_nav =
4750                         $cgi->a({-href => href(action=>"blobdiff_plain",
4751                                                hash=>$hash, hash_parent=>$hash_parent,
4752                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4753                                                file_name=>$file_name, file_parent=>$file_parent)},
4754                                 "raw");
4755                 git_header_html(undef, $expires);
4756                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4757                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4758                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4759                 } else {
4760                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4761                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4762                 }
4763                 if (defined $file_name) {
4764                         git_print_page_path($file_name, "blob", $hash_base);
4765                 } else {
4766                         print "<div class=\"page_path\"></div>\n";
4767                 }
4768
4769         } elsif ($format eq 'plain') {
4770                 print $cgi->header(
4771                         -type => 'text/plain',
4772                         -charset => 'utf-8',
4773                         -expires => $expires,
4774                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4775
4776                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4777
4778         } else {
4779                 die_error(undef, "Unknown blobdiff format");
4780         }
4781
4782         # patch
4783         if ($format eq 'html') {
4784                 print "<div class=\"page_body\">\n";
4785
4786                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4787                 close $fd;
4788
4789                 print "</div>\n"; # class="page_body"
4790                 git_footer_html();
4791
4792         } else {
4793                 while (my $line = <$fd>) {
4794                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4795                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4796
4797                         print $line;
4798
4799                         last if $line =~ m!^\+\+\+!;
4800                 }
4801                 local $/ = undef;
4802                 print <$fd>;
4803                 close $fd;
4804         }
4805 }
4806
4807 sub git_blobdiff_plain {
4808         git_blobdiff('plain');
4809 }
4810
4811 sub git_commitdiff {
4812         my $format = shift || 'html';
4813         $hash ||= $hash_base || "HEAD";
4814         my %co = parse_commit($hash);
4815         if (!%co) {
4816                 die_error(undef, "Unknown commit object");
4817         }
4818
4819         # choose format for commitdiff for merge
4820         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4821                 $hash_parent = '--cc';
4822         }
4823         # we need to prepare $formats_nav before almost any parameter munging
4824         my $formats_nav;
4825         if ($format eq 'html') {
4826                 $formats_nav =
4827                         $cgi->a({-href => href(action=>"commitdiff_plain",
4828                                                hash=>$hash, hash_parent=>$hash_parent)},
4829                                 "raw");
4830
4831                 if (defined $hash_parent &&
4832                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4833                         # commitdiff with two commits given
4834                         my $hash_parent_short = $hash_parent;
4835                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4836                                 $hash_parent_short = substr($hash_parent, 0, 7);
4837                         }
4838                         $formats_nav .=
4839                                 ' (from';
4840                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4841                                 if ($co{'parents'}[$i] eq $hash_parent) {
4842                                         $formats_nav .= ' parent ' . ($i+1);
4843                                         last;
4844                                 }
4845                         }
4846                         $formats_nav .= ': ' .
4847                                 $cgi->a({-href => href(action=>"commitdiff",
4848                                                        hash=>$hash_parent)},
4849                                         esc_html($hash_parent_short)) .
4850                                 ')';
4851                 } elsif (!$co{'parent'}) {
4852                         # --root commitdiff
4853                         $formats_nav .= ' (initial)';
4854                 } elsif (scalar @{$co{'parents'}} == 1) {
4855                         # single parent commit
4856                         $formats_nav .=
4857                                 ' (parent: ' .
4858                                 $cgi->a({-href => href(action=>"commitdiff",
4859                                                        hash=>$co{'parent'})},
4860                                         esc_html(substr($co{'parent'}, 0, 7))) .
4861                                 ')';
4862                 } else {
4863                         # merge commit
4864                         if ($hash_parent eq '--cc') {
4865                                 $formats_nav .= ' | ' .
4866                                         $cgi->a({-href => href(action=>"commitdiff",
4867                                                                hash=>$hash, hash_parent=>'-c')},
4868                                                 'combined');
4869                         } else { # $hash_parent eq '-c'
4870                                 $formats_nav .= ' | ' .
4871                                         $cgi->a({-href => href(action=>"commitdiff",
4872                                                                hash=>$hash, hash_parent=>'--cc')},
4873                                                 'compact');
4874                         }
4875                         $formats_nav .=
4876                                 ' (merge: ' .
4877                                 join(' ', map {
4878                                         $cgi->a({-href => href(action=>"commitdiff",
4879                                                                hash=>$_)},
4880                                                 esc_html(substr($_, 0, 7)));
4881                                 } @{$co{'parents'}} ) .
4882                                 ')';
4883                 }
4884         }
4885
4886         my $hash_parent_param = $hash_parent;
4887         if (!defined $hash_parent_param) {
4888                 # --cc for multiple parents, --root for parentless
4889                 $hash_parent_param =
4890                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4891         }
4892
4893         # read commitdiff
4894         my $fd;
4895         my @difftree;
4896         if ($format eq 'html') {
4897                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4898                         "--no-commit-id", "--patch-with-raw", "--full-index",
4899                         $hash_parent_param, $hash, "--"
4900                         or die_error(undef, "Open git-diff-tree failed");
4901
4902                 while (my $line = <$fd>) {
4903                         chomp $line;
4904                         # empty line ends raw part of diff-tree output
4905                         last unless $line;
4906                         push @difftree, scalar parse_difftree_raw_line($line);
4907                 }
4908
4909         } elsif ($format eq 'plain') {
4910                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4911                         '-p', $hash_parent_param, $hash, "--"
4912                         or die_error(undef, "Open git-diff-tree failed");
4913
4914         } else {
4915                 die_error(undef, "Unknown commitdiff format");
4916         }
4917
4918         # non-textual hash id's can be cached
4919         my $expires;
4920         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4921                 $expires = "+1d";
4922         }
4923
4924         # write commit message
4925         if ($format eq 'html') {
4926                 my $refs = git_get_references();
4927                 my $ref = format_ref_marker($refs, $co{'id'});
4928
4929                 git_header_html(undef, $expires);
4930                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4931                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4932                 git_print_authorship(\%co);
4933                 print "<div class=\"page_body\">\n";
4934                 if (@{$co{'comment'}} > 1) {
4935                         print "<div class=\"log\">\n";
4936                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4937                         print "</div>\n"; # class="log"
4938                 }
4939
4940         } elsif ($format eq 'plain') {
4941                 my $refs = git_get_references("tags");
4942                 my $tagname = git_get_rev_name_tags($hash);
4943                 my $filename = basename($project) . "-$hash.patch";
4944
4945                 print $cgi->header(
4946                         -type => 'text/plain',
4947                         -charset => 'utf-8',
4948                         -expires => $expires,
4949                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4950                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4951                 print <<TEXT;
4952 From: $co{'author'}
4953 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4954 Subject: $co{'title'}
4955 TEXT
4956                 print "X-Git-Tag: $tagname\n" if $tagname;
4957                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4958
4959                 foreach my $line (@{$co{'comment'}}) {
4960                         print "$line\n";
4961                 }
4962                 print "---\n\n";
4963         }
4964
4965         # write patch
4966         if ($format eq 'html') {
4967                 my $use_parents = !defined $hash_parent ||
4968                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4969                 git_difftree_body(\@difftree, $hash,
4970                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4971                 print "<br/>\n";
4972
4973                 git_patchset_body($fd, \@difftree, $hash,
4974                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4975                 close $fd;
4976                 print "</div>\n"; # class="page_body"
4977                 git_footer_html();
4978
4979         } elsif ($format eq 'plain') {
4980                 local $/ = undef;
4981                 print <$fd>;
4982                 close $fd
4983                         or print "Reading git-diff-tree failed\n";
4984         }
4985 }
4986
4987 sub git_commitdiff_plain {
4988         git_commitdiff('plain');
4989 }
4990
4991 sub git_history {
4992         if (!defined $hash_base) {
4993                 $hash_base = git_get_head_hash($project);
4994         }
4995         if (!defined $page) {
4996                 $page = 0;
4997         }
4998         my $ftype;
4999         my %co = parse_commit($hash_base);
5000         if (!%co) {
5001                 die_error(undef, "Unknown commit object");
5002         }
5003
5004         my $refs = git_get_references();
5005         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5006
5007         if (!defined $hash && defined $file_name) {
5008                 $hash = git_get_hash_by_path($hash_base, $file_name);
5009         }
5010         if (defined $hash) {
5011                 $ftype = git_get_type($hash);
5012         }
5013
5014         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5015
5016         my $paging_nav = '';
5017         if ($page > 0) {
5018                 $paging_nav .=
5019                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5020                                                file_name=>$file_name)},
5021                                 "first");
5022                 $paging_nav .= " &sdot; " .
5023                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5024                                                file_name=>$file_name, page=>$page-1),
5025                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5026         } else {
5027                 $paging_nav .= "first";
5028                 $paging_nav .= " &sdot; prev";
5029         }
5030         if ($#commitlist >= 100) {
5031                 $paging_nav .= " &sdot; " .
5032                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5033                                                file_name=>$file_name, page=>$page+1),
5034                                  -accesskey => "n", -title => "Alt-n"}, "next");
5035         } else {
5036                 $paging_nav .= " &sdot; next";
5037         }
5038         my $next_link = '';
5039         if ($#commitlist >= 100) {
5040                 $next_link =
5041                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5042                                                file_name=>$file_name, page=>$page+1),
5043                                  -accesskey => "n", -title => "Alt-n"}, "next");
5044         }
5045
5046         git_header_html();
5047         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5048         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5049         git_print_page_path($file_name, $ftype, $hash_base);
5050
5051         git_history_body(\@commitlist, 0, 99,
5052                          $refs, $hash_base, $ftype, $next_link);
5053
5054         git_footer_html();
5055 }
5056
5057 sub git_search {
5058         my ($have_search) = gitweb_check_feature('search');
5059         if (!$have_search) {
5060                 die_error('403 Permission denied', "Permission denied");
5061         }
5062         if (!defined $searchtext) {
5063                 die_error(undef, "Text field empty");
5064         }
5065         if (!defined $hash) {
5066                 $hash = git_get_head_hash($project);
5067         }
5068         my %co = parse_commit($hash);
5069         if (!%co) {
5070                 die_error(undef, "Unknown commit object");
5071         }
5072         if (!defined $page) {
5073                 $page = 0;
5074         }
5075
5076         $searchtype ||= 'commit';
5077         if ($searchtype eq 'pickaxe') {
5078                 # pickaxe may take all resources of your box and run for several minutes
5079                 # with every query - so decide by yourself how public you make this feature
5080                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5081                 if (!$have_pickaxe) {
5082                         die_error('403 Permission denied', "Permission denied");
5083                 }
5084         }
5085         if ($searchtype eq 'grep') {
5086                 my ($have_grep) = gitweb_check_feature('grep');
5087                 if (!$have_grep) {
5088                         die_error('403 Permission denied', "Permission denied");
5089                 }
5090         }
5091
5092         git_header_html();
5093
5094         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5095                 my $greptype;
5096                 if ($searchtype eq 'commit') {
5097                         $greptype = "--grep=";
5098                 } elsif ($searchtype eq 'author') {
5099                         $greptype = "--author=";
5100                 } elsif ($searchtype eq 'committer') {
5101                         $greptype = "--committer=";
5102                 }
5103                 $greptype .= $search_regexp;
5104                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5105
5106                 my $paging_nav = '';
5107                 if ($page > 0) {
5108                         $paging_nav .=
5109                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5110                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5111                                         "first");
5112                         $paging_nav .= " &sdot; " .
5113                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5114                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5115                                                        page=>$page-1),
5116                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5117                 } else {
5118                         $paging_nav .= "first";
5119                         $paging_nav .= " &sdot; prev";
5120                 }
5121                 if ($#commitlist >= 100) {
5122                         $paging_nav .= " &sdot; " .
5123                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5124                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5125                                                        page=>$page+1),
5126                                          -accesskey => "n", -title => "Alt-n"}, "next");
5127                 } else {
5128                         $paging_nav .= " &sdot; next";
5129                 }
5130                 my $next_link = '';
5131                 if ($#commitlist >= 100) {
5132                         $next_link =
5133                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5134                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5135                                                        page=>$page+1),
5136                                          -accesskey => "n", -title => "Alt-n"}, "next");
5137                 }
5138
5139                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5140                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5141                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5142         }
5143
5144         if ($searchtype eq 'pickaxe') {
5145                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5146                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5147
5148                 print "<table cellspacing=\"0\">\n";
5149                 my $alternate = 1;
5150                 $/ = "\n";
5151                 my $git_command = git_cmd_str();
5152                 my $searchqtext = $searchtext;
5153                 $searchqtext =~ s/'/'\\''/;
5154                 open my $fd, "-|", "$git_command rev-list $hash | " .
5155                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5156                 undef %co;
5157                 my @files;
5158                 while (my $line = <$fd>) {
5159                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5160                                 my %set;
5161                                 $set{'file'} = $6;
5162                                 $set{'from_id'} = $3;
5163                                 $set{'to_id'} = $4;
5164                                 $set{'id'} = $set{'to_id'};
5165                                 if ($set{'id'} =~ m/0{40}/) {
5166                                         $set{'id'} = $set{'from_id'};
5167                                 }
5168                                 if ($set{'id'} =~ m/0{40}/) {
5169                                         next;
5170                                 }
5171                                 push @files, \%set;
5172                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5173                                 if (%co) {
5174                                         if ($alternate) {
5175                                                 print "<tr class=\"dark\">\n";
5176                                         } else {
5177                                                 print "<tr class=\"light\">\n";
5178                                         }
5179                                         $alternate ^= 1;
5180                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5181                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5182                                               "<td><i>" . $author . "</i></td>\n" .
5183                                               "<td>" .
5184                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5185                                                       -class => "list subject"},
5186                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5187                                         while (my $setref = shift @files) {
5188                                                 my %set = %$setref;
5189                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5190                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5191                                                               -class => "list"},
5192                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5193                                                       "<br/>\n";
5194                                         }
5195                                         print "</td>\n" .
5196                                               "<td class=\"link\">" .
5197                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5198                                               " | " .
5199                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5200                                         print "</td>\n" .
5201                                               "</tr>\n";
5202                                 }
5203                                 %co = parse_commit($1);
5204                         }
5205                 }
5206                 close $fd;
5207
5208                 print "</table>\n";
5209         }
5210
5211         if ($searchtype eq 'grep') {
5212                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5213                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5214
5215                 print "<table cellspacing=\"0\">\n";
5216                 my $alternate = 1;
5217                 my $matches = 0;
5218                 $/ = "\n";
5219                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5220                 my $lastfile = '';
5221                 while (my $line = <$fd>) {
5222                         chomp $line;
5223                         my ($file, $lno, $ltext, $binary);
5224                         last if ($matches++ > 1000);
5225                         if ($line =~ /^Binary file (.+) matches$/) {
5226                                 $file = $1;
5227                                 $binary = 1;
5228                         } else {
5229                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5230                         }
5231                         if ($file ne $lastfile) {
5232                                 $lastfile and print "</td></tr>\n";
5233                                 if ($alternate++) {
5234                                         print "<tr class=\"dark\">\n";
5235                                 } else {
5236                                         print "<tr class=\"light\">\n";
5237                                 }
5238                                 print "<td class=\"list\">".
5239                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5240                                                                file_name=>"$file"),
5241                                                 -class => "list"}, esc_path($file));
5242                                 print "</td><td>\n";
5243                                 $lastfile = $file;
5244                         }
5245                         if ($binary) {
5246                                 print "<div class=\"binary\">Binary file</div>\n";
5247                         } else {
5248                                 $ltext = untabify($ltext);
5249                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5250                                         $ltext = esc_html($1, -nbsp=>1);
5251                                         $ltext .= '<span class="match">';
5252                                         $ltext .= esc_html($2, -nbsp=>1);
5253                                         $ltext .= '</span>';
5254                                         $ltext .= esc_html($3, -nbsp=>1);
5255                                 } else {
5256                                         $ltext = esc_html($ltext, -nbsp=>1);
5257                                 }
5258                                 print "<div class=\"pre\">" .
5259                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5260                                                                file_name=>"$file").'#l'.$lno,
5261                                                 -class => "linenr"}, sprintf('%4i', $lno))
5262                                         . ' ' .  $ltext . "</div>\n";
5263                         }
5264                 }
5265                 if ($lastfile) {
5266                         print "</td></tr>\n";
5267                         if ($matches > 1000) {
5268                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5269                         }
5270                 } else {
5271                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5272                 }
5273                 close $fd;
5274
5275                 print "</table>\n";
5276         }
5277         git_footer_html();
5278 }
5279
5280 sub git_search_help {
5281         git_header_html();
5282         git_print_page_nav('','', $hash,$hash,$hash);
5283         print <<EOT;
5284 <dl>
5285 <dt><b>commit</b></dt>
5286 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5287 EOT
5288         my ($have_grep) = gitweb_check_feature('grep');
5289         if ($have_grep) {
5290                 print <<EOT;
5291 <dt><b>grep</b></dt>
5292 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5293     a different one) are searched for the given
5294 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5295 (POSIX extended) and the matches are listed. On large
5296 trees, this search can take a while and put some strain on the server, so please use it with
5297 some consideration.</dd>
5298 EOT
5299         }
5300         print <<EOT;
5301 <dt><b>author</b></dt>
5302 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5303 <dt><b>committer</b></dt>
5304 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5305 EOT
5306         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5307         if ($have_pickaxe) {
5308                 print <<EOT;
5309 <dt><b>pickaxe</b></dt>
5310 <dd>All commits that caused the string to appear or disappear from any file (changes that
5311 added, removed or "modified" the string) will be listed. This search can take a while and
5312 takes a lot of strain on the server, so please use it wisely.</dd>
5313 EOT
5314         }
5315         print "</dl>\n";
5316         git_footer_html();
5317 }
5318
5319 sub git_shortlog {
5320         my $head = git_get_head_hash($project);
5321         if (!defined $hash) {
5322                 $hash = $head;
5323         }
5324         if (!defined $page) {
5325                 $page = 0;
5326         }
5327         my $refs = git_get_references();
5328
5329         my @commitlist = parse_commits($hash, 101, (100 * $page));
5330
5331         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5332         my $next_link = '';
5333         if ($#commitlist >= 100) {
5334                 $next_link =
5335                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5336                                  -accesskey => "n", -title => "Alt-n"}, "next");
5337         }
5338
5339         git_header_html();
5340         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5341         git_print_header_div('summary', $project);
5342
5343         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5344
5345         git_footer_html();
5346 }
5347
5348 ## ......................................................................
5349 ## feeds (RSS, Atom; OPML)
5350
5351 sub git_feed {
5352         my $format = shift || 'atom';
5353         my ($have_blame) = gitweb_check_feature('blame');
5354
5355         # Atom: http://www.atomenabled.org/developers/syndication/
5356         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5357         if ($format ne 'rss' && $format ne 'atom') {
5358                 die_error(undef, "Unknown web feed format");
5359         }
5360
5361         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5362         my $head = $hash || 'HEAD';
5363         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5364
5365         my %latest_commit;
5366         my %latest_date;
5367         my $content_type = "application/$format+xml";
5368         if (defined $cgi->http('HTTP_ACCEPT') &&
5369                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5370                 # browser (feed reader) prefers text/xml
5371                 $content_type = 'text/xml';
5372         }
5373         if (defined($commitlist[0])) {
5374                 %latest_commit = %{$commitlist[0]};
5375                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5376                 print $cgi->header(
5377                         -type => $content_type,
5378                         -charset => 'utf-8',
5379                         -last_modified => $latest_date{'rfc2822'});
5380         } else {
5381                 print $cgi->header(
5382                         -type => $content_type,
5383                         -charset => 'utf-8');
5384         }
5385
5386         # Optimization: skip generating the body if client asks only
5387         # for Last-Modified date.
5388         return if ($cgi->request_method() eq 'HEAD');
5389
5390         # header variables
5391         my $title = "$site_name - $project/$action";
5392         my $feed_type = 'log';
5393         if (defined $hash) {
5394                 $title .= " - '$hash'";
5395                 $feed_type = 'branch log';
5396                 if (defined $file_name) {
5397                         $title .= " :: $file_name";
5398                         $feed_type = 'history';
5399                 }
5400         } elsif (defined $file_name) {
5401                 $title .= " - $file_name";
5402                 $feed_type = 'history';
5403         }
5404         $title .= " $feed_type";
5405         my $descr = git_get_project_description($project);
5406         if (defined $descr) {
5407                 $descr = esc_html($descr);
5408         } else {
5409                 $descr = "$project " .
5410                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5411                          " feed";
5412         }
5413         my $owner = git_get_project_owner($project);
5414         $owner = esc_html($owner);
5415
5416         #header
5417         my $alt_url;
5418         if (defined $file_name) {
5419                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5420         } elsif (defined $hash) {
5421                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5422         } else {
5423                 $alt_url = href(-full=>1, action=>"summary");
5424         }
5425         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5426         if ($format eq 'rss') {
5427                 print <<XML;
5428 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5429 <channel>
5430 XML
5431                 print "<title>$title</title>\n" .
5432                       "<link>$alt_url</link>\n" .
5433                       "<description>$descr</description>\n" .
5434                       "<language>en</language>\n";
5435         } elsif ($format eq 'atom') {
5436                 print <<XML;
5437 <feed xmlns="http://www.w3.org/2005/Atom">
5438 XML
5439                 print "<title>$title</title>\n" .
5440                       "<subtitle>$descr</subtitle>\n" .
5441                       '<link rel="alternate" type="text/html" href="' .
5442                       $alt_url . '" />' . "\n" .
5443                       '<link rel="self" type="' . $content_type . '" href="' .
5444                       $cgi->self_url() . '" />' . "\n" .
5445                       "<id>" . href(-full=>1) . "</id>\n" .
5446                       # use project owner for feed author
5447                       "<author><name>$owner</name></author>\n";
5448                 if (defined $favicon) {
5449                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5450                 }
5451                 if (defined $logo_url) {
5452                         # not twice as wide as tall: 72 x 27 pixels
5453                         print "<logo>" . esc_url($logo) . "</logo>\n";
5454                 }
5455                 if (! %latest_date) {
5456                         # dummy date to keep the feed valid until commits trickle in:
5457                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5458                 } else {
5459                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5460                 }
5461         }
5462
5463         # contents
5464         for (my $i = 0; $i <= $#commitlist; $i++) {
5465                 my %co = %{$commitlist[$i]};
5466                 my $commit = $co{'id'};
5467                 # we read 150, we always show 30 and the ones more recent than 48 hours
5468                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5469                         last;
5470                 }
5471                 my %cd = parse_date($co{'author_epoch'});
5472
5473                 # get list of changed files
5474                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5475                         $co{'parent'} || "--root",
5476                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5477                         or next;
5478                 my @difftree = map { chomp; $_ } <$fd>;
5479                 close $fd
5480                         or next;
5481
5482                 # print element (entry, item)
5483                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5484                 if ($format eq 'rss') {
5485                         print "<item>\n" .
5486                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5487                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5488                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5489                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5490                               "<link>$co_url</link>\n" .
5491                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5492                               "<content:encoded>" .
5493                               "<![CDATA[\n";
5494                 } elsif ($format eq 'atom') {
5495                         print "<entry>\n" .
5496                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5497                               "<updated>$cd{'iso-8601'}</updated>\n" .
5498                               "<author>\n" .
5499                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5500                         if ($co{'author_email'}) {
5501                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5502                         }
5503                         print "</author>\n" .
5504                               # use committer for contributor
5505                               "<contributor>\n" .
5506                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5507                         if ($co{'committer_email'}) {
5508                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5509                         }
5510                         print "</contributor>\n" .
5511                               "<published>$cd{'iso-8601'}</published>\n" .
5512                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5513                               "<id>$co_url</id>\n" .
5514                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5515                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5516                 }
5517                 my $comment = $co{'comment'};
5518                 print "<pre>\n";
5519                 foreach my $line (@$comment) {
5520                         $line = esc_html($line);
5521                         print "$line\n";
5522                 }
5523                 print "</pre><ul>\n";
5524                 foreach my $difftree_line (@difftree) {
5525                         my %difftree = parse_difftree_raw_line($difftree_line);
5526                         next if !$difftree{'from_id'};
5527
5528                         my $file = $difftree{'file'} || $difftree{'to_file'};
5529
5530                         print "<li>" .
5531                               "[" .
5532                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5533                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5534                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5535                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5536                                       -title => "diff"}, 'D');
5537                         if ($have_blame) {
5538                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5539                                                              file_name=>$file, hash_base=>$commit),
5540                                               -title => "blame"}, 'B');
5541                         }
5542                         # if this is not a feed of a file history
5543                         if (!defined $file_name || $file_name ne $file) {
5544                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5545                                                              file_name=>$file, hash=>$commit),
5546                                               -title => "history"}, 'H');
5547                         }
5548                         $file = esc_path($file);
5549                         print "] ".
5550                               "$file</li>\n";
5551                 }
5552                 if ($format eq 'rss') {
5553                         print "</ul>]]>\n" .
5554                               "</content:encoded>\n" .
5555                               "</item>\n";
5556                 } elsif ($format eq 'atom') {
5557                         print "</ul>\n</div>\n" .
5558                               "</content>\n" .
5559                               "</entry>\n";
5560                 }
5561         }
5562
5563         # end of feed
5564         if ($format eq 'rss') {
5565                 print "</channel>\n</rss>\n";
5566         }       elsif ($format eq 'atom') {
5567                 print "</feed>\n";
5568         }
5569 }
5570
5571 sub git_rss {
5572         git_feed('rss');
5573 }
5574
5575 sub git_atom {
5576         git_feed('atom');
5577 }
5578
5579 sub git_opml {
5580         my @list = git_get_projects_list();
5581
5582         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5583         print <<XML;
5584 <?xml version="1.0" encoding="utf-8"?>
5585 <opml version="1.0">
5586 <head>
5587   <title>$site_name OPML Export</title>
5588 </head>
5589 <body>
5590 <outline text="git RSS feeds">
5591 XML
5592
5593         foreach my $pr (@list) {
5594                 my %proj = %$pr;
5595                 my $head = git_get_head_hash($proj{'path'});
5596                 if (!defined $head) {
5597                         next;
5598                 }
5599                 $git_dir = "$projectroot/$proj{'path'}";
5600                 my %co = parse_commit($head);
5601                 if (!%co) {
5602                         next;
5603                 }
5604
5605                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5606                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5607                 my $html = "$my_url?p=$proj{'path'};a=summary";
5608                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5609         }
5610         print <<XML;
5611 </outline>
5612 </body>
5613 </opml>
5614 XML
5615 }