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