git.oblomov.eu Git - git/blob - 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 $str = shift;
 698         if (utf8::valid($str)) {
 699                 utf8::decode($str);
 700                 return $str;
 701         } else {
 702                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 703         }
 704 }
 705
 706 # quote unsafe chars, but keep the slash, even when it's not
 707 # correct, but quoted slashes look too horrible in bookmarks
 708 sub esc_param {
 709         my $str = shift;
 710         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 711         $str =~ s/\+/%2B/g;
 712         $str =~ s/ /\+/g;
 713         return $str;
 714 }
 715
 716 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 717 sub esc_url {
 718         my $str = shift;
 719         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 720         $str =~ s/\+/%2B/g;
 721         $str =~ s/ /\+/g;
 722         return $str;
 723 }
 724
 725 # replace invalid utf8 character with SUBSTITUTION sequence
 726 sub esc_html ($;%) {
 727         my $str = shift;
 728         my %opts = @_;
 729
 730         $str = to_utf8($str);
 731         $str = $cgi->escapeHTML($str);
 732         if ($opts{'-nbsp'}) {
 733                 $str =~ s/ /&nbsp;/g;
 734         }
 735         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 736         return $str;
 737 }
 738
 739 # quote control characters and escape filename to HTML
 740 sub esc_path {
 741         my $str = shift;
 742         my %opts = @_;
 743
 744         $str = to_utf8($str);
 745         $str = $cgi->escapeHTML($str);
 746         if ($opts{'-nbsp'}) {
 747                 $str =~ s/ /&nbsp;/g;
 748         }
 749         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 750         return $str;
 751 }
 752
 753 # Make control characters "printable", using character escape codes (CEC)
 754 sub quot_cec {
 755         my $cntrl = shift;
 756         my %es = ( # character escape codes, aka escape sequences
 757                    "\t" => '\t',   # tab            (HT)
 758                    "\n" => '\n',   # line feed      (LF)
 759                    "\r" => '\r',   # carrige return (CR)
 760                    "\f" => '\f',   # form feed      (FF)
 761                    "\b" => '\b',   # backspace      (BS)
 762                    "\a" => '\a',   # alarm (bell)   (BEL)
 763                    "\e" => '\e',   # escape         (ESC)
 764                    "\013" => '\v', # vertical tab   (VT)
 765                    "\000" => '\0', # nul character  (NUL)
 766                    );
 767         my $chr = ( (exists $es{$cntrl})
 768                     ? $es{$cntrl}
 769                     : sprintf('\%03o', ord($cntrl)) );
 770         return "<span class=\"cntrl\">$chr</span>";
 771 }
 772
 773 # Alternatively use unicode control pictures codepoints,
 774 # Unicode "printable representation" (PR)
 775 sub quot_upr {
 776         my $cntrl = shift;
 777         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 778         return "<span class=\"cntrl\">$chr</span>";
 779 }
 780
 781 # git may return quoted and escaped filenames
 782 sub unquote {
 783         my $str = shift;
 784
 785         sub unq {
 786                 my $seq = shift;
 787                 my %es = ( # character escape codes, aka escape sequences
 788                         't' => "\t",   # tab            (HT, TAB)
 789                         'n' => "\n",   # newline        (NL)
 790                         'r' => "\r",   # return         (CR)
 791                         'f' => "\f",   # form feed      (FF)
 792                         'b' => "\b",   # backspace      (BS)
 793                         'a' => "\a",   # alarm (bell)   (BEL)
 794                         'e' => "\e",   # escape         (ESC)
 795                         'v' => "\013", # vertical tab   (VT)
 796                 );
 797
 798                 if ($seq =~ m/^[0-7]{1,3}$/) {
 799                         # octal char sequence
 800                         return chr(oct($seq));
 801                 } elsif (exists $es{$seq}) {
 802                         # C escape sequence, aka character escape code
 803                         return $es{$seq}
 804                 }
 805                 # quoted ordinary character
 806                 return $seq;
 807         }
 808
 809         if ($str =~ m/^"(.*)"$/) {
 810                 # needs unquoting
 811                 $str = $1;
 812                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 813         }
 814         return $str;
 815 }
 816
 817 # escape tabs (convert tabs to spaces)
 818 sub untabify {
 819         my $line = shift;
 820
 821         while ((my $pos = index($line, "\t")) != -1) {
 822                 if (my $count = (8 - ($pos % 8))) {
 823                         my $spaces = ' ' x $count;
 824                         $line =~ s/\t/$spaces/;
 825                 }
 826         }
 827
 828         return $line;
 829 }
 830
 831 sub project_in_list {
 832         my $project = shift;
 833         my @list = git_get_projects_list();
 834         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 835 }
 836
 837 ## ----------------------------------------------------------------------
 838 ## HTML aware string manipulation
 839
 840 sub chop_str {
 841         my $str = shift;
 842         my $len = shift;
 843         my $add_len = shift || 10;
 844
 845         # allow only $len chars, but don't cut a word if it would fit in $add_len
 846         # if it doesn't fit, cut it if it's still longer than the dots we would add
 847         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 848         my $body = $1;
 849         my $tail = $2;
 850         if (length($tail) > 4) {
 851                 $tail = " ...";
 852                 $body =~ s/&[^;]*$//; # remove chopped character entities
 853         }
 854         return "$body$tail";
 855 }
 856
 857 # takes the same arguments as chop_str, but also wraps a <span> around the
 858 # result with a title attribute if it does get chopped. Additionally, the
 859 # string is HTML-escaped.
 860 sub chop_and_escape_str {
 861         my $str = shift;
 862         my $len = shift;
 863         my $add_len = shift || 10;
 864
 865         my $chopped = chop_str($str, $len, $add_len);
 866         if ($chopped eq $str) {
 867                 return esc_html($chopped);
 868         } else {
 869                 return qq{<span title="} . esc_html($str) . qq{">} .
 870                         esc_html($chopped) . qq{</span>};
 871         }
 872 }
 873
 874 ## ----------------------------------------------------------------------
 875 ## functions returning short strings
 876
 877 # CSS class for given age value (in seconds)
 878 sub age_class {
 879         my $age = shift;
 880
 881         if (!defined $age) {
 882                 return "noage";
 883         } elsif ($age < 60*60*2) {
 884                 return "age0";
 885         } elsif ($age < 60*60*24*2) {
 886                 return "age1";
 887         } else {
 888                 return "age2";
 889         }
 890 }
 891
 892 # convert age in seconds to "nn units ago" string
 893 sub age_string {
 894         my $age = shift;
 895         my $age_str;
 896
 897         if ($age > 60*60*24*365*2) {
 898                 $age_str = (int $age/60/60/24/365);
 899                 $age_str .= " years ago";
 900         } elsif ($age > 60*60*24*(365/12)*2) {
 901                 $age_str = int $age/60/60/24/(365/12);
 902                 $age_str .= " months ago";
 903         } elsif ($age > 60*60*24*7*2) {
 904                 $age_str = int $age/60/60/24/7;
 905                 $age_str .= " weeks ago";
 906         } elsif ($age > 60*60*24*2) {
 907                 $age_str = int $age/60/60/24;
 908                 $age_str .= " days ago";
 909         } elsif ($age > 60*60*2) {
 910                 $age_str = int $age/60/60;
 911                 $age_str .= " hours ago";
 912         } elsif ($age > 60*2) {
 913                 $age_str = int $age/60;
 914                 $age_str .= " min ago";
 915         } elsif ($age > 2) {
 916                 $age_str = int $age;
 917                 $age_str .= " sec ago";
 918         } else {
 919                 $age_str .= " right now";
 920         }
 921         return $age_str;
 922 }
 923
 924 use constant {
 925         S_IFINVALID => 0030000,
 926         S_IFGITLINK => 0160000,
 927 };
 928
 929 # submodule/subproject, a commit object reference
 930 sub S_ISGITLINK($) {
 931         my $mode = shift;
 932
 933         return (($mode & S_IFMT) == S_IFGITLINK)
 934 }
 935
 936 # convert file mode in octal to symbolic file mode string
 937 sub mode_str {
 938         my $mode = oct shift;
 939
 940         if (S_ISGITLINK($mode)) {
 941                 return 'm---------';
 942         } elsif (S_ISDIR($mode & S_IFMT)) {
 943                 return 'drwxr-xr-x';
 944         } elsif (S_ISLNK($mode)) {
 945                 return 'lrwxrwxrwx';
 946         } elsif (S_ISREG($mode)) {
 947                 # git cares only about the executable bit
 948                 if ($mode & S_IXUSR) {
 949                         return '-rwxr-xr-x';
 950                 } else {
 951                         return '-rw-r--r--';
 952                 };
 953         } else {
 954                 return '----------';
 955         }
 956 }
 957
 958 # convert file mode in octal to file type string
 959 sub file_type {
 960         my $mode = shift;
 961
 962         if ($mode !~ m/^[0-7]+$/) {
 963                 return $mode;
 964         } else {
 965                 $mode = oct $mode;
 966         }
 967
 968         if (S_ISGITLINK($mode)) {
 969                 return "submodule";
 970         } elsif (S_ISDIR($mode & S_IFMT)) {
 971                 return "directory";
 972         } elsif (S_ISLNK($mode)) {
 973                 return "symlink";
 974         } elsif (S_ISREG($mode)) {
 975                 return "file";
 976         } else {
 977                 return "unknown";
 978         }
 979 }
 980
 981 # convert file mode in octal to file type description string
 982 sub file_type_long {
 983         my $mode = shift;
 984
 985         if ($mode !~ m/^[0-7]+$/) {
 986                 return $mode;
 987         } else {
 988                 $mode = oct $mode;
 989         }
 990
 991         if (S_ISGITLINK($mode)) {
 992                 return "submodule";
 993         } elsif (S_ISDIR($mode & S_IFMT)) {
 994                 return "directory";
 995         } elsif (S_ISLNK($mode)) {
 996                 return "symlink";
 997         } elsif (S_ISREG($mode)) {
 998                 if ($mode & S_IXUSR) {
 999                         return "executable";
1000                 } else {
1001                         return "file";
1002                 };
1003         } else {
1004                 return "unknown";
1005         }
1006 }
1007
1008
1009 ## ----------------------------------------------------------------------
1010 ## functions returning short HTML fragments, or transforming HTML fragments
1011 ## which don't belong to other sections
1012
1013 # format line of commit message.
1014 sub format_log_line_html {
1015         my $line = shift;
1016
1017         $line = esc_html($line, -nbsp=>1);
1018         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1019                 my $hash_text = $1;
1020                 my $link =
1021                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1022                                 -class => "text"}, $hash_text);
1023                 $line =~ s/$hash_text/$link/;
1024         }
1025         return $line;
1026 }
1027
1028 # format marker of refs pointing to given object
1029 sub format_ref_marker {
1030         my ($refs, $id) = @_;
1031         my $markers = '';
1032
1033         if (defined $refs->{$id}) {
1034                 foreach my $ref (@{$refs->{$id}}) {
1035                         my ($type, $name) = qw();
1036                         # e.g. tags/v2.6.11 or heads/next
1037                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1038                                 $type = $1;
1039                                 $name = $2;
1040                         } else {
1041                                 $type = "ref";
1042                                 $name = $ref;
1043                         }
1044
1045                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1046                                     esc_html($name) . "</span>";
1047                 }
1048         }
1049
1050         if ($markers) {
1051                 return ' <span class="refs">'. $markers . '</span>';
1052         } else {
1053                 return "";
1054         }
1055 }
1056
1057 # format, perhaps shortened and with markers, title line
1058 sub format_subject_html {
1059         my ($long, $short, $href, $extra) = @_;
1060         $extra = '' unless defined($extra);
1061
1062         if (length($short) < length($long)) {
1063                 return $cgi->a({-href => $href, -class => "list subject",
1064                                 -title => to_utf8($long)},
1065                        esc_html($short) . $extra);
1066         } else {
1067                 return $cgi->a({-href => $href, -class => "list subject"},
1068                        esc_html($long)  . $extra);
1069         }
1070 }
1071
1072 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1073 sub format_git_diff_header_line {
1074         my $line = shift;
1075         my $diffinfo = shift;
1076         my ($from, $to) = @_;
1077
1078         if ($diffinfo->{'nparents'}) {
1079                 # combined diff
1080                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1081                 if ($to->{'href'}) {
1082                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1083                                          esc_path($to->{'file'}));
1084                 } else { # file was deleted (no href)
1085                         $line .= esc_path($to->{'file'});
1086                 }
1087         } else {
1088                 # "ordinary" diff
1089                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1090                 if ($from->{'href'}) {
1091                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1092                                          'a/' . esc_path($from->{'file'}));
1093                 } else { # file was added (no href)
1094                         $line .= 'a/' . esc_path($from->{'file'});
1095                 }
1096                 $line .= ' ';
1097                 if ($to->{'href'}) {
1098                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1099                                          'b/' . esc_path($to->{'file'}));
1100                 } else { # file was deleted
1101                         $line .= 'b/' . esc_path($to->{'file'});
1102                 }
1103         }
1104
1105         return "<div class=\"diff header\">$line</div>\n";
1106 }
1107
1108 # format extended diff header line, before patch itself
1109 sub format_extended_diff_header_line {
1110         my $line = shift;
1111         my $diffinfo = shift;
1112         my ($from, $to) = @_;
1113
1114         # match <path>
1115         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1116                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1117                                        esc_path($from->{'file'}));
1118         }
1119         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1120                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1121                                  esc_path($to->{'file'}));
1122         }
1123         # match single <mode>
1124         if ($line =~ m/\s(\d{6})$/) {
1125                 $line .= '<span class="info"> (' .
1126                          file_type_long($1) .
1127                          ')</span>';
1128         }
1129         # match <hash>
1130         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1131                 # can match only for combined diff
1132                 $line = 'index ';
1133                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1134                         if ($from->{'href'}[$i]) {
1135                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1136                                                   -class=>"hash"},
1137                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1138                         } else {
1139                                 $line .= '0' x 7;
1140                         }
1141                         # separator
1142                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1143                 }
1144                 $line .= '..';
1145                 if ($to->{'href'}) {
1146                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1147                                          substr($diffinfo->{'to_id'},0,7));
1148                 } else {
1149                         $line .= '0' x 7;
1150                 }
1151
1152         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1153                 # can match only for ordinary diff
1154                 my ($from_link, $to_link);
1155                 if ($from->{'href'}) {
1156                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1157                                              substr($diffinfo->{'from_id'},0,7));
1158                 } else {
1159                         $from_link = '0' x 7;
1160                 }
1161                 if ($to->{'href'}) {
1162                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1163                                            substr($diffinfo->{'to_id'},0,7));
1164                 } else {
1165                         $to_link = '0' x 7;
1166                 }
1167                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1168                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1169         }
1170
1171         return $line . "<br/>\n";
1172 }
1173
1174 # format from-file/to-file diff header
1175 sub format_diff_from_to_header {
1176         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1177         my $line;
1178         my $result = '';
1179
1180         $line = $from_line;
1181         #assert($line =~ m/^---/) if DEBUG;
1182         # no extra formatting for "^--- /dev/null"
1183         if (! $diffinfo->{'nparents'}) {
1184                 # ordinary (single parent) diff
1185                 if ($line =~ m!^--- "?a/!) {
1186                         if ($from->{'href'}) {
1187                                 $line = '--- a/' .
1188                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1189                                                 esc_path($from->{'file'}));
1190                         } else {
1191                                 $line = '--- a/' .
1192                                         esc_path($from->{'file'});
1193                         }
1194                 }
1195                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1196
1197         } else {
1198                 # combined diff (merge commit)
1199                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1200                         if ($from->{'href'}[$i]) {
1201                                 $line = '--- ' .
1202                                         $cgi->a({-href=>href(action=>"blobdiff",
1203                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1204                                                              hash_parent_base=>$parents[$i],
1205                                                              file_parent=>$from->{'file'}[$i],
1206                                                              hash=>$diffinfo->{'to_id'},
1207                                                              hash_base=>$hash,
1208                                                              file_name=>$to->{'file'}),
1209                                                  -class=>"path",
1210                                                  -title=>"diff" . ($i+1)},
1211                                                 $i+1) .
1212                                         '/' .
1213                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1214                                                 esc_path($from->{'file'}[$i]));
1215                         } else {
1216                                 $line = '--- /dev/null';
1217                         }
1218                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1219                 }
1220         }
1221
1222         $line = $to_line;
1223         #assert($line =~ m/^\+\+\+/) if DEBUG;
1224         # no extra formatting for "^+++ /dev/null"
1225         if ($line =~ m!^\+\+\+ "?b/!) {
1226                 if ($to->{'href'}) {
1227                         $line = '+++ b/' .
1228                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1229                                         esc_path($to->{'file'}));
1230                 } else {
1231                         $line = '+++ b/' .
1232                                 esc_path($to->{'file'});
1233                 }
1234         }
1235         $result .= qq!<div class="diff to_file">$line</div>\n!;
1236
1237         return $result;
1238 }
1239
1240 # create note for patch simplified by combined diff
1241 sub format_diff_cc_simplified {
1242         my ($diffinfo, @parents) = @_;
1243         my $result = '';
1244
1245         $result .= "<div class=\"diff header\">" .
1246                    "diff --cc ";
1247         if (!is_deleted($diffinfo)) {
1248                 $result .= $cgi->a({-href => href(action=>"blob",
1249                                                   hash_base=>$hash,
1250                                                   hash=>$diffinfo->{'to_id'},
1251                                                   file_name=>$diffinfo->{'to_file'}),
1252                                     -class => "path"},
1253                                    esc_path($diffinfo->{'to_file'}));
1254         } else {
1255                 $result .= esc_path($diffinfo->{'to_file'});
1256         }
1257         $result .= "</div>\n" . # class="diff header"
1258                    "<div class=\"diff nodifferences\">" .
1259                    "Simple merge" .
1260                    "</div>\n"; # class="diff nodifferences"
1261
1262         return $result;
1263 }
1264
1265 # format patch (diff) line (not to be used for diff headers)
1266 sub format_diff_line {
1267         my $line = shift;
1268         my ($from, $to) = @_;
1269         my $diff_class = "";
1270
1271         chomp $line;
1272
1273         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1274                 # combined diff
1275                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1276                 if ($line =~ m/^\@{3}/) {
1277                         $diff_class = " chunk_header";
1278                 } elsif ($line =~ m/^\\/) {
1279                         $diff_class = " incomplete";
1280                 } elsif ($prefix =~ tr/+/+/) {
1281                         $diff_class = " add";
1282                 } elsif ($prefix =~ tr/-/-/) {
1283                         $diff_class = " rem";
1284                 }
1285         } else {
1286                 # assume ordinary diff
1287                 my $char = substr($line, 0, 1);
1288                 if ($char eq '+') {
1289                         $diff_class = " add";
1290                 } elsif ($char eq '-') {
1291                         $diff_class = " rem";
1292                 } elsif ($char eq '@') {
1293                         $diff_class = " chunk_header";
1294                 } elsif ($char eq "\\") {
1295                         $diff_class = " incomplete";
1296                 }
1297         }
1298         $line = untabify($line);
1299         if ($from && $to && $line =~ m/^\@{2} /) {
1300                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1301                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1302
1303                 $from_lines = 0 unless defined $from_lines;
1304                 $to_lines   = 0 unless defined $to_lines;
1305
1306                 if ($from->{'href'}) {
1307                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1308                                              -class=>"list"}, $from_text);
1309                 }
1310                 if ($to->{'href'}) {
1311                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1312                                              -class=>"list"}, $to_text);
1313                 }
1314                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1315                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1316                 return "<div class=\"diff$diff_class\">$line</div>\n";
1317         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1318                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1319                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1320
1321                 @from_text = split(' ', $ranges);
1322                 for (my $i = 0; $i < @from_text; ++$i) {
1323                         ($from_start[$i], $from_nlines[$i]) =
1324                                 (split(',', substr($from_text[$i], 1)), 0);
1325                 }
1326
1327                 $to_text   = pop @from_text;
1328                 $to_start  = pop @from_start;
1329                 $to_nlines = pop @from_nlines;
1330
1331                 $line = "<span class=\"chunk_info\">$prefix ";
1332                 for (my $i = 0; $i < @from_text; ++$i) {
1333                         if ($from->{'href'}[$i]) {
1334                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1335                                                   -class=>"list"}, $from_text[$i]);
1336                         } else {
1337                                 $line .= $from_text[$i];
1338                         }
1339                         $line .= " ";
1340                 }
1341                 if ($to->{'href'}) {
1342                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1343                                           -class=>"list"}, $to_text);
1344                 } else {
1345                         $line .= $to_text;
1346                 }
1347                 $line .= " $prefix</span>" .
1348                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1349                 return "<div class=\"diff$diff_class\">$line</div>\n";
1350         }
1351         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1352 }
1353
1354 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1355 # linked.  Pass the hash of the tree/commit to snapshot.
1356 sub format_snapshot_links {
1357         my ($hash) = @_;
1358         my @snapshot_fmts = gitweb_check_feature('snapshot');
1359         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1360         my $num_fmts = @snapshot_fmts;
1361         if ($num_fmts > 1) {
1362                 # A parenthesized list of links bearing format names.
1363                 # e.g. "snapshot (_tar.gz_ _zip_)"
1364                 return "snapshot (" . join(' ', map
1365                         $cgi->a({
1366                                 -href => href(
1367                                         action=>"snapshot",
1368                                         hash=>$hash,
1369                                         snapshot_format=>$_
1370                                 )
1371                         }, $known_snapshot_formats{$_}{'display'})
1372                 , @snapshot_fmts) . ")";
1373         } elsif ($num_fmts == 1) {
1374                 # A single "snapshot" link whose tooltip bears the format name.
1375                 # i.e. "_snapshot_"
1376                 my ($fmt) = @snapshot_fmts;
1377                 return
1378                         $cgi->a({
1379                                 -href => href(
1380                                         action=>"snapshot",
1381                                         hash=>$hash,
1382                                         snapshot_format=>$fmt
1383                                 ),
1384                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1385                         }, "snapshot");
1386         } else { # $num_fmts == 0
1387                 return undef;
1388         }
1389 }
1390
1391 ## ----------------------------------------------------------------------
1392 ## git utility subroutines, invoking git commands
1393
1394 # returns path to the core git executable and the --git-dir parameter as list
1395 sub git_cmd {
1396         return $GIT, '--git-dir='.$git_dir;
1397 }
1398
1399 # returns path to the core git executable and the --git-dir parameter as string
1400 sub git_cmd_str {
1401         return join(' ', git_cmd());
1402 }
1403
1404 # get HEAD ref of given project as hash
1405 sub git_get_head_hash {
1406         my $project = shift;
1407         my $o_git_dir = $git_dir;
1408         my $retval = undef;
1409         $git_dir = "$projectroot/$project";
1410         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1411                 my $head = <$fd>;
1412                 close $fd;
1413                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1414                         $retval = $1;
1415                 }
1416         }
1417         if (defined $o_git_dir) {
1418                 $git_dir = $o_git_dir;
1419         }
1420         return $retval;
1421 }
1422
1423 # get type of given object
1424 sub git_get_type {
1425         my $hash = shift;
1426
1427         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1428         my $type = <$fd>;
1429         close $fd or return;
1430         chomp $type;
1431         return $type;
1432 }
1433
1434 # repository configuration
1435 our $config_file = '';
1436 our %config;
1437
1438 # store multiple values for single key as anonymous array reference
1439 # single values stored directly in the hash, not as [ <value> ]
1440 sub hash_set_multi {
1441         my ($hash, $key, $value) = @_;
1442
1443         if (!exists $hash->{$key}) {
1444                 $hash->{$key} = $value;
1445         } elsif (!ref $hash->{$key}) {
1446                 $hash->{$key} = [ $hash->{$key}, $value ];
1447         } else {
1448                 push @{$hash->{$key}}, $value;
1449         }
1450 }
1451
1452 # return hash of git project configuration
1453 # optionally limited to some section, e.g. 'gitweb'
1454 sub git_parse_project_config {
1455         my $section_regexp = shift;
1456         my %config;
1457
1458         local $/ = "\0";
1459
1460         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1461                 or return;
1462
1463         while (my $keyval = <$fh>) {
1464                 chomp $keyval;
1465                 my ($key, $value) = split(/\n/, $keyval, 2);
1466
1467                 hash_set_multi(\%config, $key, $value)
1468                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1469         }
1470         close $fh;
1471
1472         return %config;
1473 }
1474
1475 # convert config value to boolean, 'true' or 'false'
1476 # no value, number > 0, 'true' and 'yes' values are true
1477 # rest of values are treated as false (never as error)
1478 sub config_to_bool {
1479         my $val = shift;
1480
1481         # strip leading and trailing whitespace
1482         $val =~ s/^\s+//;
1483         $val =~ s/\s+$//;
1484
1485         return (!defined $val ||               # section.key
1486                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1487                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1488 }
1489
1490 # convert config value to simple decimal number
1491 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1492 # to be multiplied by 1024, 1048576, or 1073741824
1493 sub config_to_int {
1494         my $val = shift;
1495
1496         # strip leading and trailing whitespace
1497         $val =~ s/^\s+//;
1498         $val =~ s/\s+$//;
1499
1500         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1501                 $unit = lc($unit);
1502                 # unknown unit is treated as 1
1503                 return $num * ($unit eq 'g' ? 1073741824 :
1504                                $unit eq 'm' ?    1048576 :
1505                                $unit eq 'k' ?       1024 : 1);
1506         }
1507         return $val;
1508 }
1509
1510 # convert config value to array reference, if needed
1511 sub config_to_multi {
1512         my $val = shift;
1513
1514         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1515 }
1516
1517 sub git_get_project_config {
1518         my ($key, $type) = @_;
1519
1520         # key sanity check
1521         return unless ($key);
1522         $key =~ s/^gitweb\.//;
1523         return if ($key =~ m/\W/);
1524
1525         # type sanity check
1526         if (defined $type) {
1527                 $type =~ s/^--//;
1528                 $type = undef
1529                         unless ($type eq 'bool' || $type eq 'int');
1530         }
1531
1532         # get config
1533         if (!defined $config_file ||
1534             $config_file ne "$git_dir/config") {
1535                 %config = git_parse_project_config('gitweb');
1536                 $config_file = "$git_dir/config";
1537         }
1538
1539         # ensure given type
1540         if (!defined $type) {
1541                 return $config{"gitweb.$key"};
1542         } elsif ($type eq 'bool') {
1543                 # backward compatibility: 'git config --bool' returns true/false
1544                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1545         } elsif ($type eq 'int') {
1546                 return config_to_int($config{"gitweb.$key"});
1547         }
1548         return $config{"gitweb.$key"};
1549 }
1550
1551 # get hash of given path at given ref
1552 sub git_get_hash_by_path {
1553         my $base = shift;
1554         my $path = shift || return undef;
1555         my $type = shift;
1556
1557         $path =~ s,/+$,,;
1558
1559         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1560                 or die_error(undef, "Open git-ls-tree failed");
1561         my $line = <$fd>;
1562         close $fd or return undef;
1563
1564         if (!defined $line) {
1565                 # there is no tree or hash given by $path at $base
1566                 return undef;
1567         }
1568
1569         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1570         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1571         if (defined $type && $type ne $2) {
1572                 # type doesn't match
1573                 return undef;
1574         }
1575         return $3;
1576 }
1577
1578 # get path of entry with given hash at given tree-ish (ref)
1579 # used to get 'from' filename for combined diff (merge commit) for renames
1580 sub git_get_path_by_hash {
1581         my $base = shift || return;
1582         my $hash = shift || return;
1583
1584         local $/ = "\0";
1585
1586         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1587                 or return undef;
1588         while (my $line = <$fd>) {
1589                 chomp $line;
1590
1591                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1592                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1593                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1594                         close $fd;
1595                         return $1;
1596                 }
1597         }
1598         close $fd;
1599         return undef;
1600 }
1601
1602 ## ......................................................................
1603 ## git utility functions, directly accessing git repository
1604
1605 sub git_get_project_description {
1606         my $path = shift;
1607
1608         $git_dir = "$projectroot/$path";
1609         open my $fd, "$git_dir/description"
1610                 or return git_get_project_config('description');
1611         my $descr = <$fd>;
1612         close $fd;
1613         if (defined $descr) {
1614                 chomp $descr;
1615         }
1616         return $descr;
1617 }
1618
1619 sub git_get_project_url_list {
1620         my $path = shift;
1621
1622         $git_dir = "$projectroot/$path";
1623         open my $fd, "$projectroot/$path/cloneurl"
1624                 or return wantarray ?
1625                 @{ config_to_multi(git_get_project_config('url')) } :
1626                    config_to_multi(git_get_project_config('url'));
1627         my @git_project_url_list = map { chomp; $_ } <$fd>;
1628         close $fd;
1629
1630         return wantarray ? @git_project_url_list : \@git_project_url_list;
1631 }
1632
1633 sub git_get_projects_list {
1634         my ($filter) = @_;
1635         my @list;
1636
1637         $filter ||= '';
1638         $filter =~ s/\.git$//;
1639
1640         my ($check_forks) = gitweb_check_feature('forks');
1641
1642         if (-d $projects_list) {
1643                 # search in directory
1644                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1645                 # remove the trailing "/"
1646                 $dir =~ s!/+$!!;
1647                 my $pfxlen = length("$dir");
1648                 my $pfxdepth = ($dir =~ tr!/!!);
1649
1650                 File::Find::find({
1651                         follow_fast => 1, # follow symbolic links
1652                         follow_skip => 2, # ignore duplicates
1653                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1654                         wanted => sub {
1655                                 # skip project-list toplevel, if we get it.
1656                                 return if (m!^[/.]$!);
1657                                 # only directories can be git repositories
1658                                 return unless (-d $_);
1659                                 # don't traverse too deep (Find is super slow on os x)
1660                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1661                                         $File::Find::prune = 1;
1662                                         return;
1663                                 }
1664
1665                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1666                                 # we check related file in $projectroot
1667                                 if ($check_forks and $subdir =~ m#/.#) {
1668                                         $File::Find::prune = 1;
1669                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1670                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1671                                         $File::Find::prune = 1;
1672                                 }
1673                         },
1674                 }, "$dir");
1675
1676         } elsif (-f $projects_list) {
1677                 # read from file(url-encoded):
1678                 # 'git%2Fgit.git Linus+Torvalds'
1679                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1680                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1681                 my %paths;
1682                 open my ($fd), $projects_list or return;
1683         PROJECT:
1684                 while (my $line = <$fd>) {
1685                         chomp $line;
1686                         my ($path, $owner) = split ' ', $line;
1687                         $path = unescape($path);
1688                         $owner = unescape($owner);
1689                         if (!defined $path) {
1690                                 next;
1691                         }
1692                         if ($filter ne '') {
1693                                 # looking for forks;
1694                                 my $pfx = substr($path, 0, length($filter));
1695                                 if ($pfx ne $filter) {
1696                                         next PROJECT;
1697                                 }
1698                                 my $sfx = substr($path, length($filter));
1699                                 if ($sfx !~ /^\/.*\.git$/) {
1700                                         next PROJECT;
1701                                 }
1702                         } elsif ($check_forks) {
1703                         PATH:
1704                                 foreach my $filter (keys %paths) {
1705                                         # looking for forks;
1706                                         my $pfx = substr($path, 0, length($filter));
1707                                         if ($pfx ne $filter) {
1708                                                 next PATH;
1709                                         }
1710                                         my $sfx = substr($path, length($filter));
1711                                         if ($sfx !~ /^\/.*\.git$/) {
1712                                                 next PATH;
1713                                         }
1714                                         # is a fork, don't include it in
1715                                         # the list
1716                                         next PROJECT;
1717                                 }
1718                         }
1719                         if (check_export_ok("$projectroot/$path")) {
1720                                 my $pr = {
1721                                         path => $path,
1722                                         owner => to_utf8($owner),
1723                                 };
1724                                 push @list, $pr;
1725                                 (my $forks_path = $path) =~ s/\.git$//;
1726                                 $paths{$forks_path}++;
1727                         }
1728                 }
1729                 close $fd;
1730         }
1731         return @list;
1732 }
1733
1734 our $gitweb_project_owner = undef;
1735 sub git_get_project_list_from_file {
1736
1737         return if (defined $gitweb_project_owner);
1738
1739         $gitweb_project_owner = {};
1740         # read from file (url-encoded):
1741         # 'git%2Fgit.git Linus+Torvalds'
1742         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1743         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1744         if (-f $projects_list) {
1745                 open (my $fd , $projects_list);
1746                 while (my $line = <$fd>) {
1747                         chomp $line;
1748                         my ($pr, $ow) = split ' ', $line;
1749                         $pr = unescape($pr);
1750                         $ow = unescape($ow);
1751                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1752                 }
1753                 close $fd;
1754         }
1755 }
1756
1757 sub git_get_project_owner {
1758         my $project = shift;
1759         my $owner;
1760
1761         return undef unless $project;
1762         $git_dir = "$projectroot/$project";
1763
1764         if (!defined $gitweb_project_owner) {
1765                 git_get_project_list_from_file();
1766         }
1767
1768         if (exists $gitweb_project_owner->{$project}) {
1769                 $owner = $gitweb_project_owner->{$project};
1770         }
1771         if (!defined $owner){
1772                 $owner = git_get_project_config('owner');
1773         }
1774         if (!defined $owner) {
1775                 $owner = get_file_owner("$git_dir");
1776         }
1777
1778         return $owner;
1779 }
1780
1781 sub git_get_last_activity {
1782         my ($path) = @_;
1783         my $fd;
1784
1785         $git_dir = "$projectroot/$path";
1786         open($fd, "-|", git_cmd(), 'for-each-ref',
1787              '--format=%(committer)',
1788              '--sort=-committerdate',
1789              '--count=1',
1790              'refs/heads') or return;
1791         my $most_recent = <$fd>;
1792         close $fd or return;
1793         if (defined $most_recent &&
1794             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1795                 my $timestamp = $1;
1796                 my $age = time - $timestamp;
1797                 return ($age, age_string($age));
1798         }
1799         return (undef, undef);
1800 }
1801
1802 sub git_get_references {
1803         my $type = shift || "";
1804         my %refs;
1805         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1806         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1807         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1808                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1809                 or return;
1810
1811         while (my $line = <$fd>) {
1812                 chomp $line;
1813                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1814                         if (defined $refs{$1}) {
1815                                 push @{$refs{$1}}, $2;
1816                         } else {
1817                                 $refs{$1} = [ $2 ];
1818                         }
1819                 }
1820         }
1821         close $fd or return;
1822         return \%refs;
1823 }
1824
1825 sub git_get_rev_name_tags {
1826         my $hash = shift || return undef;
1827
1828         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1829                 or return;
1830         my $name_rev = <$fd>;
1831         close $fd;
1832
1833         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1834                 return $1;
1835         } else {
1836                 # catches also '$hash undefined' output
1837                 return undef;
1838         }
1839 }
1840
1841 ## ----------------------------------------------------------------------
1842 ## parse to hash functions
1843
1844 sub parse_date {
1845         my $epoch = shift;
1846         my $tz = shift || "-0000";
1847
1848         my %date;
1849         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1850         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1851         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1852         $date{'hour'} = $hour;
1853         $date{'minute'} = $min;
1854         $date{'mday'} = $mday;
1855         $date{'day'} = $days[$wday];
1856         $date{'month'} = $months[$mon];
1857         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1858                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1859         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1860                              $mday, $months[$mon], $hour ,$min;
1861         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1862                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1863
1864         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1865         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1866         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1867         $date{'hour_local'} = $hour;
1868         $date{'minute_local'} = $min;
1869         $date{'tz_local'} = $tz;
1870         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1871                                   1900+$year, $mon+1, $mday,
1872                                   $hour, $min, $sec, $tz);
1873         return %date;
1874 }
1875
1876 sub parse_tag {
1877         my $tag_id = shift;
1878         my %tag;
1879         my @comment;
1880
1881         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1882         $tag{'id'} = $tag_id;
1883         while (my $line = <$fd>) {
1884                 chomp $line;
1885                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1886                         $tag{'object'} = $1;
1887                 } elsif ($line =~ m/^type (.+)$/) {
1888                         $tag{'type'} = $1;
1889                 } elsif ($line =~ m/^tag (.+)$/) {
1890                         $tag{'name'} = $1;
1891                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1892                         $tag{'author'} = $1;
1893                         $tag{'epoch'} = $2;
1894                         $tag{'tz'} = $3;
1895                 } elsif ($line =~ m/--BEGIN/) {
1896                         push @comment, $line;
1897                         last;
1898                 } elsif ($line eq "") {
1899                         last;
1900                 }
1901         }
1902         push @comment, <$fd>;
1903         $tag{'comment'} = \@comment;
1904         close $fd or return;
1905         if (!defined $tag{'name'}) {
1906                 return
1907         };
1908         return %tag
1909 }
1910
1911 sub parse_commit_text {
1912         my ($commit_text, $withparents) = @_;
1913         my @commit_lines = split '\n', $commit_text;
1914         my %co;
1915
1916         pop @commit_lines; # Remove '\0'
1917
1918         if (! @commit_lines) {
1919                 return;
1920         }
1921
1922         my $header = shift @commit_lines;
1923         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1924                 return;
1925         }
1926         ($co{'id'}, my @parents) = split ' ', $header;
1927         while (my $line = shift @commit_lines) {
1928                 last if $line eq "\n";
1929                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1930                         $co{'tree'} = $1;
1931                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1932                         push @parents, $1;
1933                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1934                         $co{'author'} = $1;
1935                         $co{'author_epoch'} = $2;
1936                         $co{'author_tz'} = $3;
1937                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1938                                 $co{'author_name'}  = $1;
1939                                 $co{'author_email'} = $2;
1940                         } else {
1941                                 $co{'author_name'} = $co{'author'};
1942                         }
1943                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1944                         $co{'committer'} = $1;
1945                         $co{'committer_epoch'} = $2;
1946                         $co{'committer_tz'} = $3;
1947                         $co{'committer_name'} = $co{'committer'};
1948                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1949                                 $co{'committer_name'}  = $1;
1950                                 $co{'committer_email'} = $2;
1951                         } else {
1952                                 $co{'committer_name'} = $co{'committer'};
1953                         }
1954                 }
1955         }
1956         if (!defined $co{'tree'}) {
1957                 return;
1958         };
1959         $co{'parents'} = \@parents;
1960         $co{'parent'} = $parents[0];
1961
1962         foreach my $title (@commit_lines) {
1963                 $title =~ s/^    //;
1964                 if ($title ne "") {
1965                         $co{'title'} = chop_str($title, 80, 5);
1966                         # remove leading stuff of merges to make the interesting part visible
1967                         if (length($title) > 50) {
1968                                 $title =~ s/^Automatic //;
1969                                 $title =~ s/^merge (of|with) /Merge ... /i;
1970                                 if (length($title) > 50) {
1971                                         $title =~ s/(http|rsync):\/\///;
1972                                 }
1973                                 if (length($title) > 50) {
1974                                         $title =~ s/(master|www|rsync)\.//;
1975                                 }
1976                                 if (length($title) > 50) {
1977                                         $title =~ s/kernel.org:?//;
1978                                 }
1979                                 if (length($title) > 50) {
1980                                         $title =~ s/\/pub\/scm//;
1981                                 }
1982                         }
1983                         $co{'title_short'} = chop_str($title, 50, 5);
1984                         last;
1985                 }
1986         }
1987         if ($co{'title'} eq "") {
1988                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1989         }
1990         # remove added spaces
1991         foreach my $line (@commit_lines) {
1992                 $line =~ s/^    //;
1993         }
1994         $co{'comment'} = \@commit_lines;
1995
1996         my $age = time - $co{'committer_epoch'};
1997         $co{'age'} = $age;
1998         $co{'age_string'} = age_string($age);
1999         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2000         if ($age > 60*60*24*7*2) {
2001                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2002                 $co{'age_string_age'} = $co{'age_string'};
2003         } else {
2004                 $co{'age_string_date'} = $co{'age_string'};
2005                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2006         }
2007         return %co;
2008 }
2009
2010 sub parse_commit {
2011         my ($commit_id) = @_;
2012         my %co;
2013
2014         local $/ = "\0";
2015
2016         open my $fd, "-|", git_cmd(), "rev-list",
2017                 "--parents",
2018                 "--header",
2019                 "--max-count=1",
2020                 $commit_id,
2021                 "--",
2022                 or die_error(undef, "Open git-rev-list failed");
2023         %co = parse_commit_text(<$fd>, 1);
2024         close $fd;
2025
2026         return %co;
2027 }
2028
2029 sub parse_commits {
2030         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2031         my @cos;
2032
2033         $maxcount ||= 1;
2034         $skip ||= 0;
2035
2036         local $/ = "\0";
2037
2038         open my $fd, "-|", git_cmd(), "rev-list",
2039                 "--header",
2040                 ($arg ? ($arg) : ()),
2041                 ("--max-count=" . $maxcount),
2042                 ("--skip=" . $skip),
2043                 @extra_options,
2044                 $commit_id,
2045                 "--",
2046                 ($filename ? ($filename) : ())
2047                 or die_error(undef, "Open git-rev-list failed");
2048         while (my $line = <$fd>) {
2049                 my %co = parse_commit_text($line);
2050                 push @cos, \%co;
2051         }
2052         close $fd;
2053
2054         return wantarray ? @cos : \@cos;
2055 }
2056
2057 # parse ref from ref_file, given by ref_id, with given type
2058 sub parse_ref {
2059         my $ref_file = shift;
2060         my $ref_id = shift;
2061         my $type = shift || git_get_type($ref_id);
2062         my %ref_item;
2063
2064         $ref_item{'type'} = $type;
2065         $ref_item{'id'} = $ref_id;
2066         $ref_item{'epoch'} = 0;
2067         $ref_item{'age'} = "unknown";
2068         if ($type eq "tag") {
2069                 my %tag = parse_tag($ref_id);
2070                 $ref_item{'comment'} = $tag{'comment'};
2071                 if ($tag{'type'} eq "commit") {
2072                         my %co = parse_commit($tag{'object'});
2073                         $ref_item{'epoch'} = $co{'committer_epoch'};
2074                         $ref_item{'age'} = $co{'age_string'};
2075                 } elsif (defined($tag{'epoch'})) {
2076                         my $age = time - $tag{'epoch'};
2077                         $ref_item{'epoch'} = $tag{'epoch'};
2078                         $ref_item{'age'} = age_string($age);
2079                 }
2080                 $ref_item{'reftype'} = $tag{'type'};
2081                 $ref_item{'name'} = $tag{'name'};
2082                 $ref_item{'refid'} = $tag{'object'};
2083         } elsif ($type eq "commit"){
2084                 my %co = parse_commit($ref_id);
2085                 $ref_item{'reftype'} = "commit";
2086                 $ref_item{'name'} = $ref_file;
2087                 $ref_item{'title'} = $co{'title'};
2088                 $ref_item{'refid'} = $ref_id;
2089                 $ref_item{'epoch'} = $co{'committer_epoch'};
2090                 $ref_item{'age'} = $co{'age_string'};
2091         } else {
2092                 $ref_item{'reftype'} = $type;
2093                 $ref_item{'name'} = $ref_file;
2094                 $ref_item{'refid'} = $ref_id;
2095         }
2096
2097         return %ref_item;
2098 }
2099
2100 # parse line of git-diff-tree "raw" output
2101 sub parse_difftree_raw_line {
2102         my $line = shift;
2103         my %res;
2104
2105         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2106         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2107         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2108                 $res{'from_mode'} = $1;
2109                 $res{'to_mode'} = $2;
2110                 $res{'from_id'} = $3;
2111                 $res{'to_id'} = $4;
2112                 $res{'status'} = $res{'status_str'} = $5;
2113                 $res{'similarity'} = $6;
2114                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2115                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2116                 } else {
2117                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2118                 }
2119         }
2120         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2121         # combined diff (for merge commit)
2122         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2123                 $res{'nparents'}  = length($1);
2124                 $res{'from_mode'} = [ split(' ', $2) ];
2125                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2126                 $res{'from_id'} = [ split(' ', $3) ];
2127                 $res{'to_id'} = pop @{$res{'from_id'}};
2128                 $res{'status_str'} = $4;
2129                 $res{'status'} = [ split('', $4) ];
2130                 $res{'to_file'} = unquote($5);
2131         }
2132         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2133         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2134                 $res{'commit'} = $1;
2135         }
2136
2137         return wantarray ? %res : \%res;
2138 }
2139
2140 # wrapper: return parsed line of git-diff-tree "raw" output
2141 # (the argument might be raw line, or parsed info)
2142 sub parsed_difftree_line {
2143         my $line_or_ref = shift;
2144
2145         if (ref($line_or_ref) eq "HASH") {
2146                 # pre-parsed (or generated by hand)
2147                 return $line_or_ref;
2148         } else {
2149                 return parse_difftree_raw_line($line_or_ref);
2150         }
2151 }
2152
2153 # parse line of git-ls-tree output
2154 sub parse_ls_tree_line ($;%) {
2155         my $line = shift;
2156         my %opts = @_;
2157         my %res;
2158
2159         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2160         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2161
2162         $res{'mode'} = $1;
2163         $res{'type'} = $2;
2164         $res{'hash'} = $3;
2165         if ($opts{'-z'}) {
2166                 $res{'name'} = $4;
2167         } else {
2168                 $res{'name'} = unquote($4);
2169         }
2170
2171         return wantarray ? %res : \%res;
2172 }
2173
2174 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2175 sub parse_from_to_diffinfo {
2176         my ($diffinfo, $from, $to, @parents) = @_;
2177
2178         if ($diffinfo->{'nparents'}) {
2179                 # combined diff
2180                 $from->{'file'} = [];
2181                 $from->{'href'} = [];
2182                 fill_from_file_info($diffinfo, @parents)
2183                         unless exists $diffinfo->{'from_file'};
2184                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2185                         $from->{'file'}[$i] =
2186                                 defined $diffinfo->{'from_file'}[$i] ?
2187                                         $diffinfo->{'from_file'}[$i] :
2188                                         $diffinfo->{'to_file'};
2189                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2190                                 $from->{'href'}[$i] = href(action=>"blob",
2191                                                            hash_base=>$parents[$i],
2192                                                            hash=>$diffinfo->{'from_id'}[$i],
2193                                                            file_name=>$from->{'file'}[$i]);
2194                         } else {
2195                                 $from->{'href'}[$i] = undef;
2196                         }
2197                 }
2198         } else {
2199                 # ordinary (not combined) diff
2200                 $from->{'file'} = $diffinfo->{'from_file'};
2201                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2202                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2203                                                hash=>$diffinfo->{'from_id'},
2204                                                file_name=>$from->{'file'});
2205                 } else {
2206                         delete $from->{'href'};
2207                 }
2208         }
2209
2210         $to->{'file'} = $diffinfo->{'to_file'};
2211         if (!is_deleted($diffinfo)) { # file exists in result
2212                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2213                                      hash=>$diffinfo->{'to_id'},
2214                                      file_name=>$to->{'file'});
2215         } else {
2216                 delete $to->{'href'};
2217         }
2218 }
2219
2220 ## ......................................................................
2221 ## parse to array of hashes functions
2222
2223 sub git_get_heads_list {
2224         my $limit = shift;
2225         my @headslist;
2226
2227         open my $fd, '-|', git_cmd(), 'for-each-ref',
2228                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2229                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2230                 'refs/heads'
2231                 or return;
2232         while (my $line = <$fd>) {
2233                 my %ref_item;
2234
2235                 chomp $line;
2236                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2237                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2238                 my ($committer, $epoch, $tz) =
2239                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2240                 $ref_item{'fullname'}  = $name;
2241                 $name =~ s!^refs/heads/!!;
2242
2243                 $ref_item{'name'}  = $name;
2244                 $ref_item{'id'}    = $hash;
2245                 $ref_item{'title'} = $title || '(no commit message)';
2246                 $ref_item{'epoch'} = $epoch;
2247                 if ($epoch) {
2248                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2249                 } else {
2250                         $ref_item{'age'} = "unknown";
2251                 }
2252
2253                 push @headslist, \%ref_item;
2254         }
2255         close $fd;
2256
2257         return wantarray ? @headslist : \@headslist;
2258 }
2259
2260 sub git_get_tags_list {
2261         my $limit = shift;
2262         my @tagslist;
2263
2264         open my $fd, '-|', git_cmd(), 'for-each-ref',
2265                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2266                 '--format=%(objectname) %(objecttype) %(refname) '.
2267                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2268                 'refs/tags'
2269                 or return;
2270         while (my $line = <$fd>) {
2271                 my %ref_item;
2272
2273                 chomp $line;
2274                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2275                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2276                 my ($creator, $epoch, $tz) =
2277                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2278                 $ref_item{'fullname'} = $name;
2279                 $name =~ s!^refs/tags/!!;
2280
2281                 $ref_item{'type'} = $type;
2282                 $ref_item{'id'} = $id;
2283                 $ref_item{'name'} = $name;
2284                 if ($type eq "tag") {
2285                         $ref_item{'subject'} = $title;
2286                         $ref_item{'reftype'} = $reftype;
2287                         $ref_item{'refid'}   = $refid;
2288                 } else {
2289                         $ref_item{'reftype'} = $type;
2290                         $ref_item{'refid'}   = $id;
2291                 }
2292
2293                 if ($type eq "tag" || $type eq "commit") {
2294                         $ref_item{'epoch'} = $epoch;
2295                         if ($epoch) {
2296                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2297                         } else {
2298                                 $ref_item{'age'} = "unknown";
2299                         }
2300                 }
2301
2302                 push @tagslist, \%ref_item;
2303         }
2304         close $fd;
2305
2306         return wantarray ? @tagslist : \@tagslist;
2307 }
2308
2309 ## ----------------------------------------------------------------------
2310 ## filesystem-related functions
2311
2312 sub get_file_owner {
2313         my $path = shift;
2314
2315         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2316         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2317         if (!defined $gcos) {
2318                 return undef;
2319         }
2320         my $owner = $gcos;
2321         $owner =~ s/[,;].*$//;
2322         return to_utf8($owner);
2323 }
2324
2325 ## ......................................................................
2326 ## mimetype related functions
2327
2328 sub mimetype_guess_file {
2329         my $filename = shift;
2330         my $mimemap = shift;
2331         -r $mimemap or return undef;
2332
2333         my %mimemap;
2334         open(MIME, $mimemap) or return undef;
2335         while (<MIME>) {
2336                 next if m/^#/; # skip comments
2337                 my ($mime, $exts) = split(/\t+/);
2338                 if (defined $exts) {
2339                         my @exts = split(/\s+/, $exts);
2340                         foreach my $ext (@exts) {
2341                                 $mimemap{$ext} = $mime;
2342                         }
2343                 }
2344         }
2345         close(MIME);
2346
2347         $filename =~ /\.([^.]*)$/;
2348         return $mimemap{$1};
2349 }
2350
2351 sub mimetype_guess {
2352         my $filename = shift;
2353         my $mime;
2354         $filename =~ /\./ or return undef;
2355
2356         if ($mimetypes_file) {
2357                 my $file = $mimetypes_file;
2358                 if ($file !~ m!^/!) { # if it is relative path
2359                         # it is relative to project
2360                         $file = "$projectroot/$project/$file";
2361                 }
2362                 $mime = mimetype_guess_file($filename, $file);
2363         }
2364         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2365         return $mime;
2366 }
2367
2368 sub blob_mimetype {
2369         my $fd = shift;
2370         my $filename = shift;
2371
2372         if ($filename) {
2373                 my $mime = mimetype_guess($filename);
2374                 $mime and return $mime;
2375         }
2376
2377         # just in case
2378         return $default_blob_plain_mimetype unless $fd;
2379
2380         if (-T $fd) {
2381                 return 'text/plain' .
2382                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2383         } elsif (! $filename) {
2384                 return 'application/octet-stream';
2385         } elsif ($filename =~ m/\.png$/i) {
2386                 return 'image/png';
2387         } elsif ($filename =~ m/\.gif$/i) {
2388                 return 'image/gif';
2389         } elsif ($filename =~ m/\.jpe?g$/i) {
2390                 return 'image/jpeg';
2391         } else {
2392                 return 'application/octet-stream';
2393         }
2394 }
2395
2396 ## ======================================================================
2397 ## functions printing HTML: header, footer, error page
2398
2399 sub git_header_html {
2400         my $status = shift || "200 OK";
2401         my $expires = shift;
2402
2403         my $title = "$site_name";
2404         if (defined $project) {
2405                 $title .= " - " . to_utf8($project);
2406                 if (defined $action) {
2407                         $title .= "/$action";
2408                         if (defined $file_name) {
2409                                 $title .= " - " . esc_path($file_name);
2410                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2411                                         $title .= "/";
2412                                 }
2413                         }
2414                 }
2415         }
2416         my $content_type;
2417         # require explicit support from the UA if we are to send the page as
2418         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2419         # we have to do this because MSIE sometimes globs '*/*', pretending to
2420         # support xhtml+xml but choking when it gets what it asked for.
2421         if (defined $cgi->http('HTTP_ACCEPT') &&
2422             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2423             $cgi->Accept('application/xhtml+xml') != 0) {
2424                 $content_type = 'application/xhtml+xml';
2425         } else {
2426                 $content_type = 'text/html';
2427         }
2428         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2429                            -status=> $status, -expires => $expires);
2430         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2431         print <<EOF;
2432 <?xml version="1.0" encoding="utf-8"?>
2433 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2434 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2435 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2436 <!-- git core binaries version $git_version -->
2437 <head>
2438 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2439 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2440 <meta name="robots" content="index, nofollow"/>
2441 <title>$title</title>
2442 EOF
2443 # print out each stylesheet that exist
2444         if (defined $stylesheet) {
2445 #provides backwards capability for those people who define style sheet in a config file
2446                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2447         } else {
2448                 foreach my $stylesheet (@stylesheets) {
2449                         next unless $stylesheet;
2450                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2451                 }
2452         }
2453         if (defined $project) {
2454                 printf('<link rel="alternate" title="%s log RSS feed" '.
2455                        'href="%s" type="application/rss+xml" />'."\n",
2456                        esc_param($project), href(action=>"rss"));
2457                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2458                        'href="%s" type="application/rss+xml" />'."\n",
2459                        esc_param($project), href(action=>"rss",
2460                                                  extra_options=>"--no-merges"));
2461                 printf('<link rel="alternate" title="%s log Atom feed" '.
2462                        'href="%s" type="application/atom+xml" />'."\n",
2463                        esc_param($project), href(action=>"atom"));
2464                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2465                        'href="%s" type="application/atom+xml" />'."\n",
2466                        esc_param($project), href(action=>"atom",
2467                                                  extra_options=>"--no-merges"));
2468         } else {
2469                 printf('<link rel="alternate" title="%s projects list" '.
2470                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2471                        $site_name, href(project=>undef, action=>"project_index"));
2472                 printf('<link rel="alternate" title="%s projects feeds" '.
2473                        'href="%s" type="text/x-opml"/>'."\n",
2474                        $site_name, href(project=>undef, action=>"opml"));
2475         }
2476         if (defined $favicon) {
2477                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2478         }
2479
2480         print "</head>\n" .
2481               "<body>\n";
2482
2483         if (-f $site_header) {
2484                 open (my $fd, $site_header);
2485                 print <$fd>;
2486                 close $fd;
2487         }
2488
2489         print "<div class=\"page_header\">\n" .
2490               $cgi->a({-href => esc_url($logo_url),
2491                        -title => $logo_label},
2492                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2493         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2494         if (defined $project) {
2495                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2496                 if (defined $action) {
2497                         print " / $action";
2498                 }
2499                 print "\n";
2500         }
2501         print "</div>\n";
2502
2503         my ($have_search) = gitweb_check_feature('search');
2504         if ((defined $project) && ($have_search)) {
2505                 if (!defined $searchtext) {
2506                         $searchtext = "";
2507                 }
2508                 my $search_hash;
2509                 if (defined $hash_base) {
2510                         $search_hash = $hash_base;
2511                 } elsif (defined $hash) {
2512                         $search_hash = $hash;
2513                 } else {
2514                         $search_hash = "HEAD";
2515                 }
2516                 my $action = $my_uri;
2517                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2518                 if ($use_pathinfo) {
2519                         $action .= "/$project";
2520                 } else {
2521                         $cgi->param("p", $project);
2522                 }
2523                 $cgi->param("a", "search");
2524                 $cgi->param("h", $search_hash);
2525                 print $cgi->startform(-method => "get", -action => $action) .
2526                       "<div class=\"search\">\n" .
2527                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2528                       $cgi->hidden(-name => "a") . "\n" .
2529                       $cgi->hidden(-name => "h") . "\n" .
2530                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2531                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2532                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2533                       " search:\n",
2534                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2535                       "</div>" .
2536                       $cgi->end_form() . "\n";
2537         }
2538 }
2539
2540 sub git_footer_html {
2541         print "<div class=\"page_footer\">\n";
2542         if (defined $project) {
2543                 my $descr = git_get_project_description($project);
2544                 if (defined $descr) {
2545                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2546                 }
2547                 print $cgi->a({-href => href(action=>"rss"),
2548                               -class => "rss_logo"}, "RSS") . " ";
2549                 print $cgi->a({-href => href(action=>"atom"),
2550                               -class => "rss_logo"}, "Atom") . "\n";
2551         } else {
2552                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2553                               -class => "rss_logo"}, "OPML") . " ";
2554                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2555                               -class => "rss_logo"}, "TXT") . "\n";
2556         }
2557         print "</div>\n" ;
2558
2559         if (-f $site_footer) {
2560                 open (my $fd, $site_footer);
2561                 print <$fd>;
2562                 close $fd;
2563         }
2564
2565         print "</body>\n" .
2566               "</html>";
2567 }
2568
2569 sub die_error {
2570         my $status = shift || "403 Forbidden";
2571         my $error = shift || "Malformed query, file missing or permission denied";
2572
2573         git_header_html($status);
2574         print <<EOF;
2575 <div class="page_body">
2576 <br /><br />
2577 $status - $error
2578 <br />
2579 </div>
2580 EOF
2581         git_footer_html();
2582         exit;
2583 }
2584
2585 ## ----------------------------------------------------------------------
2586 ## functions printing or outputting HTML: navigation
2587
2588 sub git_print_page_nav {
2589         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2590         $extra = '' if !defined $extra; # pager or formats
2591
2592         my @navs = qw(summary shortlog log commit commitdiff tree);
2593         if ($suppress) {
2594                 @navs = grep { $_ ne $suppress } @navs;
2595         }
2596
2597         my %arg = map { $_ => {action=>$_} } @navs;
2598         if (defined $head) {
2599                 for (qw(commit commitdiff)) {
2600                         $arg{$_}{'hash'} = $head;
2601                 }
2602                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2603                         for (qw(shortlog log)) {
2604                                 $arg{$_}{'hash'} = $head;
2605                         }
2606                 }
2607         }
2608         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2609         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2610
2611         print "<div class=\"page_nav\">\n" .
2612                 (join " | ",
2613                  map { $_ eq $current ?
2614                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2615                  } @navs);
2616         print "<br/>\n$extra<br/>\n" .
2617               "</div>\n";
2618 }
2619
2620 sub format_paging_nav {
2621         my ($action, $hash, $head, $page, $nrevs) = @_;
2622         my $paging_nav;
2623
2624
2625         if ($hash ne $head || $page) {
2626                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2627         } else {
2628                 $paging_nav .= "HEAD";
2629         }
2630
2631         if ($page > 0) {
2632                 $paging_nav .= " &sdot; " .
2633                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2634                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2635         } else {
2636                 $paging_nav .= " &sdot; prev";
2637         }
2638
2639         if ($nrevs >= (100 * ($page+1)-1)) {
2640                 $paging_nav .= " &sdot; " .
2641                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2642                                  -accesskey => "n", -title => "Alt-n"}, "next");
2643         } else {
2644                 $paging_nav .= " &sdot; next";
2645         }
2646
2647         return $paging_nav;
2648 }
2649
2650 ## ......................................................................
2651 ## functions printing or outputting HTML: div
2652
2653 sub git_print_header_div {
2654         my ($action, $title, $hash, $hash_base) = @_;
2655         my %args = ();
2656
2657         $args{'action'} = $action;
2658         $args{'hash'} = $hash if $hash;
2659         $args{'hash_base'} = $hash_base if $hash_base;
2660
2661         print "<div class=\"header\">\n" .
2662               $cgi->a({-href => href(%args), -class => "title"},
2663               $title ? $title : $action) .
2664               "\n</div>\n";
2665 }
2666
2667 #sub git_print_authorship (\%) {
2668 sub git_print_authorship {
2669         my $co = shift;
2670
2671         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2672         print "<div class=\"author_date\">" .
2673               esc_html($co->{'author_name'}) .
2674               " [$ad{'rfc2822'}";
2675         if ($ad{'hour_local'} < 6) {
2676                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2677                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2678         } else {
2679                 printf(" (%02d:%02d %s)",
2680                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2681         }
2682         print "]</div>\n";
2683 }
2684
2685 sub git_print_page_path {
2686         my $name = shift;
2687         my $type = shift;
2688         my $hb = shift;
2689
2690
2691         print "<div class=\"page_path\">";
2692         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2693                       -title => 'tree root'}, to_utf8("[$project]"));
2694         print " / ";
2695         if (defined $name) {
2696                 my @dirname = split '/', $name;
2697                 my $basename = pop @dirname;
2698                 my $fullname = '';
2699
2700                 foreach my $dir (@dirname) {
2701                         $fullname .= ($fullname ? '/' : '') . $dir;
2702                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2703                                                      hash_base=>$hb),
2704                                       -title => $fullname}, esc_path($dir));
2705                         print " / ";
2706                 }
2707                 if (defined $type && $type eq 'blob') {
2708                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2709                                                      hash_base=>$hb),
2710                                       -title => $name}, esc_path($basename));
2711                 } elsif (defined $type && $type eq 'tree') {
2712                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2713                                                      hash_base=>$hb),
2714                                       -title => $name}, esc_path($basename));
2715                         print " / ";
2716                 } else {
2717                         print esc_path($basename);
2718                 }
2719         }
2720         print "<br/></div>\n";
2721 }
2722
2723 # sub git_print_log (\@;%) {
2724 sub git_print_log ($;%) {
2725         my $log = shift;
2726         my %opts = @_;
2727
2728         if ($opts{'-remove_title'}) {
2729                 # remove title, i.e. first line of log
2730                 shift @$log;
2731         }
2732         # remove leading empty lines
2733         while (defined $log->[0] && $log->[0] eq "") {
2734                 shift @$log;
2735         }
2736
2737         # print log
2738         my $signoff = 0;
2739         my $empty = 0;
2740         foreach my $line (@$log) {
2741                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2742                         $signoff = 1;
2743                         $empty = 0;
2744                         if (! $opts{'-remove_signoff'}) {
2745                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2746                                 next;
2747                         } else {
2748                                 # remove signoff lines
2749                                 next;
2750                         }
2751                 } else {
2752                         $signoff = 0;
2753                 }
2754
2755                 # print only one empty line
2756                 # do not print empty line after signoff
2757                 if ($line eq "") {
2758                         next if ($empty || $signoff);
2759                         $empty = 1;
2760                 } else {
2761                         $empty = 0;
2762                 }
2763
2764                 print format_log_line_html($line) . "<br/>\n";
2765         }
2766
2767         if ($opts{'-final_empty_line'}) {
2768                 # end with single empty line
2769                 print "<br/>\n" unless $empty;
2770         }
2771 }
2772
2773 # return link target (what link points to)
2774 sub git_get_link_target {
2775         my $hash = shift;
2776         my $link_target;
2777
2778         # read link
2779         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2780                 or return;
2781         {
2782                 local $/;
2783                 $link_target = <$fd>;
2784         }
2785         close $fd
2786                 or return;
2787
2788         return $link_target;
2789 }
2790
2791 # given link target, and the directory (basedir) the link is in,
2792 # return target of link relative to top directory (top tree);
2793 # return undef if it is not possible (including absolute links).
2794 sub normalize_link_target {
2795         my ($link_target, $basedir, $hash_base) = @_;
2796
2797         # we can normalize symlink target only if $hash_base is provided
2798         return unless $hash_base;
2799
2800         # absolute symlinks (beginning with '/') cannot be normalized
2801         return if (substr($link_target, 0, 1) eq '/');
2802
2803         # normalize link target to path from top (root) tree (dir)
2804         my $path;
2805         if ($basedir) {
2806                 $path = $basedir . '/' . $link_target;
2807         } else {
2808                 # we are in top (root) tree (dir)
2809                 $path = $link_target;
2810         }
2811
2812         # remove //, /./, and /../
2813         my @path_parts;
2814         foreach my $part (split('/', $path)) {
2815                 # discard '.' and ''
2816                 next if (!$part || $part eq '.');
2817                 # handle '..'
2818                 if ($part eq '..') {
2819                         if (@path_parts) {
2820                                 pop @path_parts;
2821                         } else {
2822                                 # link leads outside repository (outside top dir)
2823                                 return;
2824                         }
2825                 } else {
2826                         push @path_parts, $part;
2827                 }
2828         }
2829         $path = join('/', @path_parts);
2830
2831         return $path;
2832 }
2833
2834 # print tree entry (row of git_tree), but without encompassing <tr> element
2835 sub git_print_tree_entry {
2836         my ($t, $basedir, $hash_base, $have_blame) = @_;
2837
2838         my %base_key = ();
2839         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2840
2841         # The format of a table row is: mode list link.  Where mode is
2842         # the mode of the entry, list is the name of the entry, an href,
2843         # and link is the action links of the entry.
2844
2845         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2846         if ($t->{'type'} eq "blob") {
2847                 print "<td class=\"list\">" .
2848                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2849                                                file_name=>"$basedir$t->{'name'}", %base_key),
2850                                 -class => "list"}, esc_path($t->{'name'}));
2851                 if (S_ISLNK(oct $t->{'mode'})) {
2852                         my $link_target = git_get_link_target($t->{'hash'});
2853                         if ($link_target) {
2854                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2855                                 if (defined $norm_target) {
2856                                         print " -> " .
2857                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2858                                                                      file_name=>$norm_target),
2859                                                        -title => $norm_target}, esc_path($link_target));
2860                                 } else {
2861                                         print " -> " . esc_path($link_target);
2862                                 }
2863                         }
2864                 }
2865                 print "</td>\n";
2866                 print "<td class=\"link\">";
2867                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2868                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2869                               "blob");
2870                 if ($have_blame) {
2871                         print " | " .
2872                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2873                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2874                                       "blame");
2875                 }
2876                 if (defined $hash_base) {
2877                         print " | " .
2878                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2879                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2880                                       "history");
2881                 }
2882                 print " | " .
2883                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2884                                                file_name=>"$basedir$t->{'name'}")},
2885                                 "raw");
2886                 print "</td>\n";
2887
2888         } elsif ($t->{'type'} eq "tree") {
2889                 print "<td class=\"list\">";
2890                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2891                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2892                               esc_path($t->{'name'}));
2893                 print "</td>\n";
2894                 print "<td class=\"link\">";
2895                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2896                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2897                               "tree");
2898                 if (defined $hash_base) {
2899                         print " | " .
2900                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2901                                                      file_name=>"$basedir$t->{'name'}")},
2902                                       "history");
2903                 }
2904                 print "</td>\n";
2905         } else {
2906                 # unknown object: we can only present history for it
2907                 # (this includes 'commit' object, i.e. submodule support)
2908                 print "<td class=\"list\">" .
2909                       esc_path($t->{'name'}) .
2910                       "</td>\n";
2911                 print "<td class=\"link\">";
2912                 if (defined $hash_base) {
2913                         print $cgi->a({-href => href(action=>"history",
2914                                                      hash_base=>$hash_base,
2915                                                      file_name=>"$basedir$t->{'name'}")},
2916                                       "history");
2917                 }
2918                 print "</td>\n";
2919         }
2920 }
2921
2922 ## ......................................................................
2923 ## functions printing large fragments of HTML
2924
2925 # get pre-image filenames for merge (combined) diff
2926 sub fill_from_file_info {
2927         my ($diff, @parents) = @_;
2928
2929         $diff->{'from_file'} = [ ];
2930         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2931         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2932                 if ($diff->{'status'}[$i] eq 'R' ||
2933                     $diff->{'status'}[$i] eq 'C') {
2934                         $diff->{'from_file'}[$i] =
2935                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2936                 }
2937         }
2938
2939         return $diff;
2940 }
2941
2942 # is current raw difftree line of file deletion
2943 sub is_deleted {
2944         my $diffinfo = shift;
2945
2946         return $diffinfo->{'status_str'} =~ /D/;
2947 }
2948
2949 # does patch correspond to [previous] difftree raw line
2950 # $diffinfo  - hashref of parsed raw diff format
2951 # $patchinfo - hashref of parsed patch diff format
2952 #              (the same keys as in $diffinfo)
2953 sub is_patch_split {
2954         my ($diffinfo, $patchinfo) = @_;
2955
2956         return defined $diffinfo && defined $patchinfo
2957                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2958 }
2959
2960
2961 sub git_difftree_body {
2962         my ($difftree, $hash, @parents) = @_;
2963         my ($parent) = $parents[0];
2964         my ($have_blame) = gitweb_check_feature('blame');
2965         print "<div class=\"list_head\">\n";
2966         if ($#{$difftree} > 10) {
2967                 print(($#{$difftree} + 1) . " files changed:\n");
2968         }
2969         print "</div>\n";
2970
2971         print "<table class=\"" .
2972               (@parents > 1 ? "combined " : "") .
2973               "diff_tree\">\n";
2974
2975         # header only for combined diff in 'commitdiff' view
2976         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2977         if ($has_header) {
2978                 # table header
2979                 print "<thead><tr>\n" .
2980                        "<th></th><th></th>\n"; # filename, patchN link
2981                 for (my $i = 0; $i < @parents; $i++) {
2982                         my $par = $parents[$i];
2983                         print "<th>" .
2984                               $cgi->a({-href => href(action=>"commitdiff",
2985                                                      hash=>$hash, hash_parent=>$par),
2986                                        -title => 'commitdiff to parent number ' .
2987                                                   ($i+1) . ': ' . substr($par,0,7)},
2988                                       $i+1) .
2989                               "&nbsp;</th>\n";
2990                 }
2991                 print "</tr></thead>\n<tbody>\n";
2992         }
2993
2994         my $alternate = 1;
2995         my $patchno = 0;
2996         foreach my $line (@{$difftree}) {
2997                 my $diff = parsed_difftree_line($line);
2998
2999                 if ($alternate) {
3000                         print "<tr class=\"dark\">\n";
3001                 } else {
3002                         print "<tr class=\"light\">\n";
3003                 }
3004                 $alternate ^= 1;
3005
3006                 if (exists $diff->{'nparents'}) { # combined diff
3007
3008                         fill_from_file_info($diff, @parents)
3009                                 unless exists $diff->{'from_file'};
3010
3011                         if (!is_deleted($diff)) {
3012                                 # file exists in the result (child) commit
3013                                 print "<td>" .
3014                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3015                                                              file_name=>$diff->{'to_file'},
3016                                                              hash_base=>$hash),
3017                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3018                                       "</td>\n";
3019                         } else {
3020                                 print "<td>" .
3021                                       esc_path($diff->{'to_file'}) .
3022                                       "</td>\n";
3023                         }
3024
3025                         if ($action eq 'commitdiff') {
3026                                 # link to patch
3027                                 $patchno++;
3028                                 print "<td class=\"link\">" .
3029                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3030                                       " | " .
3031                                       "</td>\n";
3032                         }
3033
3034                         my $has_history = 0;
3035                         my $not_deleted = 0;
3036                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3037                                 my $hash_parent = $parents[$i];
3038                                 my $from_hash = $diff->{'from_id'}[$i];
3039                                 my $from_path = $diff->{'from_file'}[$i];
3040                                 my $status = $diff->{'status'}[$i];
3041
3042                                 $has_history ||= ($status ne 'A');
3043                                 $not_deleted ||= ($status ne 'D');
3044
3045                                 if ($status eq 'A') {
3046                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3047                                 } elsif ($status eq 'D') {
3048                                         print "<td class=\"link\">" .
3049                                               $cgi->a({-href => href(action=>"blob",
3050                                                                      hash_base=>$hash,
3051                                                                      hash=>$from_hash,
3052                                                                      file_name=>$from_path)},
3053                                                       "blob" . ($i+1)) .
3054                                               " | </td>\n";
3055                                 } else {
3056                                         if ($diff->{'to_id'} eq $from_hash) {
3057                                                 print "<td class=\"link nochange\">";
3058                                         } else {
3059                                                 print "<td class=\"link\">";
3060                                         }
3061                                         print $cgi->a({-href => href(action=>"blobdiff",
3062                                                                      hash=>$diff->{'to_id'},
3063                                                                      hash_parent=>$from_hash,
3064                                                                      hash_base=>$hash,
3065                                                                      hash_parent_base=>$hash_parent,
3066                                                                      file_name=>$diff->{'to_file'},
3067                                                                      file_parent=>$from_path)},
3068                                                       "diff" . ($i+1)) .
3069                                               " | </td>\n";
3070                                 }
3071                         }
3072
3073                         print "<td class=\"link\">";
3074                         if ($not_deleted) {
3075                                 print $cgi->a({-href => href(action=>"blob",
3076                                                              hash=>$diff->{'to_id'},
3077                                                              file_name=>$diff->{'to_file'},
3078                                                              hash_base=>$hash)},
3079                                               "blob");
3080                                 print " | " if ($has_history);
3081                         }
3082                         if ($has_history) {
3083                                 print $cgi->a({-href => href(action=>"history",
3084                                                              file_name=>$diff->{'to_file'},
3085                                                              hash_base=>$hash)},
3086                                               "history");
3087                         }
3088                         print "</td>\n";
3089
3090                         print "</tr>\n";
3091                         next; # instead of 'else' clause, to avoid extra indent
3092                 }
3093                 # else ordinary diff
3094
3095                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3096                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3097                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3098                         $to_mode_oct = oct $diff->{'to_mode'};
3099                         if (S_ISREG($to_mode_oct)) { # only for regular file
3100                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3101                         }
3102                         $to_file_type = file_type($diff->{'to_mode'});
3103                 }
3104                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3105                         $from_mode_oct = oct $diff->{'from_mode'};
3106                         if (S_ISREG($to_mode_oct)) { # only for regular file
3107                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3108                         }
3109                         $from_file_type = file_type($diff->{'from_mode'});
3110                 }
3111
3112                 if ($diff->{'status'} eq "A") { # created
3113                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3114                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3115                         $mode_chng   .= "]</span>";
3116                         print "<td>";
3117                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3118                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3119                                       -class => "list"}, esc_path($diff->{'file'}));
3120                         print "</td>\n";
3121                         print "<td>$mode_chng</td>\n";
3122                         print "<td class=\"link\">";
3123                         if ($action eq 'commitdiff') {
3124                                 # link to patch
3125                                 $patchno++;
3126                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3127                                 print " | ";
3128                         }
3129                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3130                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3131                                       "blob");
3132                         print "</td>\n";
3133
3134                 } elsif ($diff->{'status'} eq "D") { # deleted
3135                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3136                         print "<td>";
3137                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3138                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3139                                        -class => "list"}, esc_path($diff->{'file'}));
3140                         print "</td>\n";
3141                         print "<td>$mode_chng</td>\n";
3142                         print "<td class=\"link\">";
3143                         if ($action eq 'commitdiff') {
3144                                 # link to patch
3145                                 $patchno++;
3146                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3147                                 print " | ";
3148                         }
3149                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3150                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3151                                       "blob") . " | ";
3152                         if ($have_blame) {
3153                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3154                                                              file_name=>$diff->{'file'})},
3155                                               "blame") . " | ";
3156                         }
3157                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3158                                                      file_name=>$diff->{'file'})},
3159                                       "history");
3160                         print "</td>\n";
3161
3162                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3163                         my $mode_chnge = "";
3164                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3165                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3166                                 if ($from_file_type ne $to_file_type) {
3167                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3168                                 }
3169                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3170                                         if ($from_mode_str && $to_mode_str) {
3171                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3172                                         } elsif ($to_mode_str) {
3173                                                 $mode_chnge .= " mode: $to_mode_str";
3174                                         }
3175                                 }
3176                                 $mode_chnge .= "]</span>\n";
3177                         }
3178                         print "<td>";
3179                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3180                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3181                                       -class => "list"}, esc_path($diff->{'file'}));
3182                         print "</td>\n";
3183                         print "<td>$mode_chnge</td>\n";
3184                         print "<td class=\"link\">";
3185                         if ($action eq 'commitdiff') {
3186                                 # link to patch
3187                                 $patchno++;
3188                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3189                                       " | ";
3190                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3191                                 # "commit" view and modified file (not onlu mode changed)
3192                                 print $cgi->a({-href => href(action=>"blobdiff",
3193                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3194                                                              hash_base=>$hash, hash_parent_base=>$parent,
3195                                                              file_name=>$diff->{'file'})},
3196                                               "diff") .
3197                                       " | ";
3198                         }
3199                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3200                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3201                                        "blob") . " | ";
3202                         if ($have_blame) {
3203                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3204                                                              file_name=>$diff->{'file'})},
3205                                               "blame") . " | ";
3206                         }
3207                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3208                                                      file_name=>$diff->{'file'})},
3209                                       "history");
3210                         print "</td>\n";
3211
3212                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3213                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3214                         my $nstatus = $status_name{$diff->{'status'}};
3215                         my $mode_chng = "";
3216                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3217                                 # mode also for directories, so we cannot use $to_mode_str
3218                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3219                         }
3220                         print "<td>" .
3221                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3222                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3223                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3224                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3225                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3226                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3227                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3228                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3229                               "<td class=\"link\">";
3230                         if ($action eq 'commitdiff') {
3231                                 # link to patch
3232                                 $patchno++;
3233                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3234                                       " | ";
3235                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3236                                 # "commit" view and modified file (not only pure rename or copy)
3237                                 print $cgi->a({-href => href(action=>"blobdiff",
3238                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3239                                                              hash_base=>$hash, hash_parent_base=>$parent,
3240                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3241                                               "diff") .
3242                                       " | ";
3243                         }
3244                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3245                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3246                                       "blob") . " | ";
3247                         if ($have_blame) {
3248                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3249                                                              file_name=>$diff->{'to_file'})},
3250                                               "blame") . " | ";
3251                         }
3252                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3253                                                     file_name=>$diff->{'to_file'})},
3254                                       "history");
3255                         print "</td>\n";
3256
3257                 } # we should not encounter Unmerged (U) or Unknown (X) status
3258                 print "</tr>\n";
3259         }
3260         print "</tbody>" if $has_header;
3261         print "</table>\n";
3262 }
3263
3264 sub git_patchset_body {
3265         my ($fd, $difftree, $hash, @hash_parents) = @_;
3266         my ($hash_parent) = $hash_parents[0];
3267
3268         my $is_combined = (@hash_parents > 1);
3269         my $patch_idx = 0;
3270         my $patch_number = 0;
3271         my $patch_line;
3272         my $diffinfo;
3273         my $to_name;
3274         my (%from, %to);
3275
3276         print "<div class=\"patchset\">\n";
3277
3278         # skip to first patch
3279         while ($patch_line = <$fd>) {
3280                 chomp $patch_line;
3281
3282                 last if ($patch_line =~ m/^diff /);
3283         }
3284
3285  PATCH:
3286         while ($patch_line) {
3287
3288                 # parse "git diff" header line
3289                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3290                         # $1 is from_name, which we do not use
3291                         $to_name = unquote($2);
3292                         $to_name =~ s!^b/!!;
3293                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3294                         # $1 is 'cc' or 'combined', which we do not use
3295                         $to_name = unquote($2);
3296                 } else {
3297                         $to_name = undef;
3298                 }
3299
3300                 # check if current patch belong to current raw line
3301                 # and parse raw git-diff line if needed
3302                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3303                         # this is continuation of a split patch
3304                         print "<div class=\"patch cont\">\n";
3305                 } else {
3306                         # advance raw git-diff output if needed
3307                         $patch_idx++ if defined $diffinfo;
3308
3309                         # read and prepare patch information
3310                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3311
3312                         # compact combined diff output can have some patches skipped
3313                         # find which patch (using pathname of result) we are at now;
3314                         if ($is_combined) {
3315                                 while ($to_name ne $diffinfo->{'to_file'}) {
3316                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3317                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3318                                               "</div>\n";  # class="patch"
3319
3320                                         $patch_idx++;
3321                                         $patch_number++;
3322
3323                                         last if $patch_idx > $#$difftree;
3324                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3325                                 }
3326                         }
3327
3328                         # modifies %from, %to hashes
3329                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3330
3331                         # this is first patch for raw difftree line with $patch_idx index
3332                         # we index @$difftree array from 0, but number patches from 1
3333                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3334                 }
3335
3336                 # git diff header
3337                 #assert($patch_line =~ m/^diff /) if DEBUG;
3338                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3339                 $patch_number++;
3340                 # print "git diff" header
3341                 print format_git_diff_header_line($patch_line, $diffinfo,
3342                                                   \%from, \%to);
3343
3344                 # print extended diff header
3345                 print "<div class=\"diff extended_header\">\n";
3346         EXTENDED_HEADER:
3347                 while ($patch_line = <$fd>) {
3348                         chomp $patch_line;
3349
3350                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3351
3352                         print format_extended_diff_header_line($patch_line, $diffinfo,
3353                                                                \%from, \%to);
3354                 }
3355                 print "</div>\n"; # class="diff extended_header"
3356
3357                 # from-file/to-file diff header
3358                 if (! $patch_line) {
3359                         print "</div>\n"; # class="patch"
3360                         last PATCH;
3361                 }
3362                 next PATCH if ($patch_line =~ m/^diff /);
3363                 #assert($patch_line =~ m/^---/) if DEBUG;
3364
3365                 my $last_patch_line = $patch_line;
3366                 $patch_line = <$fd>;
3367                 chomp $patch_line;
3368                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3369
3370                 print format_diff_from_to_header($last_patch_line, $patch_line,
3371                                                  $diffinfo, \%from, \%to,
3372                                                  @hash_parents);
3373
3374                 # the patch itself
3375         LINE:
3376                 while ($patch_line = <$fd>) {
3377                         chomp $patch_line;
3378
3379                         next PATCH if ($patch_line =~ m/^diff /);
3380
3381                         print format_diff_line($patch_line, \%from, \%to);
3382                 }
3383
3384         } continue {
3385                 print "</div>\n"; # class="patch"
3386         }
3387
3388         # for compact combined (--cc) format, with chunk and patch simpliciaction
3389         # patchset might be empty, but there might be unprocessed raw lines
3390         for (++$patch_idx if $patch_number > 0;
3391              $patch_idx < @$difftree;
3392              ++$patch_idx) {
3393                 # read and prepare patch information
3394                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3395
3396                 # generate anchor for "patch" links in difftree / whatchanged part
3397                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3398                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3399                       "</div>\n";  # class="patch"
3400
3401                 $patch_number++;
3402         }
3403
3404         if ($patch_number == 0) {
3405                 if (@hash_parents > 1) {
3406                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3407                 } else {
3408                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3409                 }
3410         }
3411
3412         print "</div>\n"; # class="patchset"
3413 }
3414
3415 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3416
3417 sub git_project_list_body {
3418         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3419
3420         my ($check_forks) = gitweb_check_feature('forks');
3421
3422         my @projects;
3423         foreach my $pr (@$projlist) {
3424                 my (@aa) = git_get_last_activity($pr->{'path'});
3425                 unless (@aa) {
3426                         next;
3427                 }
3428                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3429                 if (!defined $pr->{'descr'}) {
3430                         my $descr = git_get_project_description($pr->{'path'}) || "";
3431                         $pr->{'descr_long'} = to_utf8($descr);
3432                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3433                 }
3434                 if (!defined $pr->{'owner'}) {
3435                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3436                 }
3437                 if ($check_forks) {
3438                         my $pname = $pr->{'path'};
3439                         if (($pname =~ s/\.git$//) &&
3440                             ($pname !~ /\/$/) &&
3441                             (-d "$projectroot/$pname")) {
3442                                 $pr->{'forks'} = "-d $projectroot/$pname";
3443                         }
3444                         else {
3445                                 $pr->{'forks'} = 0;
3446                         }
3447                 }
3448                 push @projects, $pr;
3449         }
3450
3451         $order ||= $default_projects_order;
3452         $from = 0 unless defined $from;
3453         $to = $#projects if (!defined $to || $#projects < $to);
3454
3455         print "<table class=\"project_list\">\n";
3456         unless ($no_header) {
3457                 print "<tr>\n";
3458                 if ($check_forks) {
3459                         print "<th></th>\n";
3460                 }
3461                 if ($order eq "project") {
3462                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3463                         print "<th>Project</th>\n";
3464                 } else {
3465                         print "<th>" .
3466                               $cgi->a({-href => href(project=>undef, order=>'project'),
3467                                        -class => "header"}, "Project") .
3468                               "</th>\n";
3469                 }
3470                 if ($order eq "descr") {
3471                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3472                         print "<th>Description</th>\n";
3473                 } else {
3474                         print "<th>" .
3475                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3476                                        -class => "header"}, "Description") .
3477                               "</th>\n";
3478                 }
3479                 if ($order eq "owner") {
3480                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3481                         print "<th>Owner</th>\n";
3482                 } else {
3483                         print "<th>" .
3484                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3485                                        -class => "header"}, "Owner") .
3486                               "</th>\n";
3487                 }
3488                 if ($order eq "age") {
3489                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3490                         print "<th>Last Change</th>\n";
3491                 } else {
3492                         print "<th>" .
3493                               $cgi->a({-href => href(project=>undef, order=>'age'),
3494                                        -class => "header"}, "Last Change") .
3495                               "</th>\n";
3496                 }
3497                 print "<th></th>\n" .
3498                       "</tr>\n";
3499         }
3500         my $alternate = 1;
3501         for (my $i = $from; $i <= $to; $i++) {
3502                 my $pr = $projects[$i];
3503                 if ($alternate) {
3504                         print "<tr class=\"dark\">\n";
3505                 } else {
3506                         print "<tr class=\"light\">\n";
3507                 }
3508                 $alternate ^= 1;
3509                 if ($check_forks) {
3510                         print "<td>";
3511                         if ($pr->{'forks'}) {
3512                                 print "<!-- $pr->{'forks'} -->\n";
3513                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3514                         }
3515                         print "</td>\n";
3516                 }
3517                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3518                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3519                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3520                                         -class => "list", -title => $pr->{'descr_long'}},
3521                                         esc_html($pr->{'descr'})) . "</td>\n" .
3522                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3523                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3524                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3525                       "<td class=\"link\">" .
3526                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3527                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3528                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3529                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3530                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3531                       "</td>\n" .
3532                       "</tr>\n";
3533         }
3534         if (defined $extra) {
3535                 print "<tr>\n";
3536                 if ($check_forks) {
3537                         print "<td></td>\n";
3538                 }
3539                 print "<td colspan=\"5\">$extra</td>\n" .
3540                       "</tr>\n";
3541         }
3542         print "</table>\n";
3543 }
3544
3545 sub git_shortlog_body {
3546         # uses global variable $project
3547         my ($commitlist, $from, $to, $refs, $extra) = @_;
3548
3549         $from = 0 unless defined $from;
3550         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3551
3552         print "<table class=\"shortlog\">\n";
3553         my $alternate = 1;
3554         for (my $i = $from; $i <= $to; $i++) {
3555                 my %co = %{$commitlist->[$i]};
3556                 my $commit = $co{'id'};
3557                 my $ref = format_ref_marker($refs, $commit);
3558                 if ($alternate) {
3559                         print "<tr class=\"dark\">\n";
3560                 } else {
3561                         print "<tr class=\"light\">\n";
3562                 }
3563                 $alternate ^= 1;
3564                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3565                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3566                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3567                       "<td><i>" . $author . "</i></td>\n" .
3568                       "<td>";
3569                 print format_subject_html($co{'title'}, $co{'title_short'},
3570                                           href(action=>"commit", hash=>$commit), $ref);
3571                 print "</td>\n" .
3572                       "<td class=\"link\">" .
3573                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3574                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3575                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3576                 my $snapshot_links = format_snapshot_links($commit);
3577                 if (defined $snapshot_links) {
3578                         print " | " . $snapshot_links;
3579                 }
3580                 print "</td>\n" .
3581                       "</tr>\n";
3582         }
3583         if (defined $extra) {
3584                 print "<tr>\n" .
3585                       "<td colspan=\"4\">$extra</td>\n" .
3586                       "</tr>\n";
3587         }
3588         print "</table>\n";
3589 }
3590
3591 sub git_history_body {
3592         # Warning: assumes constant type (blob or tree) during history
3593         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3594
3595         $from = 0 unless defined $from;
3596         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3597
3598         print "<table class=\"history\">\n";
3599         my $alternate = 1;
3600         for (my $i = $from; $i <= $to; $i++) {
3601                 my %co = %{$commitlist->[$i]};
3602                 if (!%co) {
3603                         next;
3604                 }
3605                 my $commit = $co{'id'};
3606
3607                 my $ref = format_ref_marker($refs, $commit);
3608
3609                 if ($alternate) {
3610                         print "<tr class=\"dark\">\n";
3611                 } else {
3612                         print "<tr class=\"light\">\n";
3613                 }
3614                 $alternate ^= 1;
3615         # shortlog uses      chop_str($co{'author_name'}, 10)
3616                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3617                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3618                       "<td><i>" . $author . "</i></td>\n" .
3619                       "<td>";
3620                 # originally git_history used chop_str($co{'title'}, 50)
3621                 print format_subject_html($co{'title'}, $co{'title_short'},
3622                                           href(action=>"commit", hash=>$commit), $ref);
3623                 print "</td>\n" .
3624                       "<td class=\"link\">" .
3625                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3626                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3627
3628                 if ($ftype eq 'blob') {
3629                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3630                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3631                         if (defined $blob_current && defined $blob_parent &&
3632                                         $blob_current ne $blob_parent) {
3633                                 print " | " .
3634                                         $cgi->a({-href => href(action=>"blobdiff",
3635                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3636                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3637                                                                file_name=>$file_name)},
3638                                                 "diff to current");
3639                         }
3640                 }
3641                 print "</td>\n" .
3642                       "</tr>\n";
3643         }
3644         if (defined $extra) {
3645                 print "<tr>\n" .
3646                       "<td colspan=\"4\">$extra</td>\n" .
3647                       "</tr>\n";
3648         }
3649         print "</table>\n";
3650 }
3651
3652 sub git_tags_body {
3653         # uses global variable $project
3654         my ($taglist, $from, $to, $extra) = @_;
3655         $from = 0 unless defined $from;
3656         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3657
3658         print "<table class=\"tags\">\n";
3659         my $alternate = 1;
3660         for (my $i = $from; $i <= $to; $i++) {
3661                 my $entry = $taglist->[$i];
3662                 my %tag = %$entry;
3663                 my $comment = $tag{'subject'};
3664                 my $comment_short;
3665                 if (defined $comment) {
3666                         $comment_short = chop_str($comment, 30, 5);
3667                 }
3668                 if ($alternate) {
3669                         print "<tr class=\"dark\">\n";
3670                 } else {
3671                         print "<tr class=\"light\">\n";
3672                 }
3673                 $alternate ^= 1;
3674                 if (defined $tag{'age'}) {
3675                         print "<td><i>$tag{'age'}</i></td>\n";
3676                 } else {
3677                         print "<td></td>\n";
3678                 }
3679                 print "<td>" .
3680                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3681                                -class => "list name"}, esc_html($tag{'name'})) .
3682                       "</td>\n" .
3683                       "<td>";
3684                 if (defined $comment) {
3685                         print format_subject_html($comment, $comment_short,
3686                                                   href(action=>"tag", hash=>$tag{'id'}));
3687                 }
3688                 print "</td>\n" .
3689                       "<td class=\"selflink\">";
3690                 if ($tag{'type'} eq "tag") {
3691                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3692                 } else {
3693                         print "&nbsp;";
3694                 }
3695                 print "</td>\n" .
3696                       "<td class=\"link\">" . " | " .
3697                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3698                 if ($tag{'reftype'} eq "commit") {
3699                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3700                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3701                 } elsif ($tag{'reftype'} eq "blob") {
3702                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3703                 }
3704                 print "</td>\n" .
3705                       "</tr>";
3706         }
3707         if (defined $extra) {
3708                 print "<tr>\n" .
3709                       "<td colspan=\"5\">$extra</td>\n" .
3710                       "</tr>\n";
3711         }
3712         print "</table>\n";
3713 }
3714
3715 sub git_heads_body {
3716         # uses global variable $project
3717         my ($headlist, $head, $from, $to, $extra) = @_;
3718         $from = 0 unless defined $from;
3719         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3720
3721         print "<table class=\"heads\">\n";
3722         my $alternate = 1;
3723         for (my $i = $from; $i <= $to; $i++) {
3724                 my $entry = $headlist->[$i];
3725                 my %ref = %$entry;
3726                 my $curr = $ref{'id'} eq $head;
3727                 if ($alternate) {
3728                         print "<tr class=\"dark\">\n";
3729                 } else {
3730                         print "<tr class=\"light\">\n";
3731                 }
3732                 $alternate ^= 1;
3733                 print "<td><i>$ref{'age'}</i></td>\n" .
3734                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3735                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3736                                -class => "list name"},esc_html($ref{'name'})) .
3737                       "</td>\n" .
3738                       "<td class=\"link\">" .
3739                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3740                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3741                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3742                       "</td>\n" .
3743                       "</tr>";
3744         }
3745         if (defined $extra) {
3746                 print "<tr>\n" .
3747                       "<td colspan=\"3\">$extra</td>\n" .
3748                       "</tr>\n";
3749         }
3750         print "</table>\n";
3751 }
3752
3753 sub git_search_grep_body {
3754         my ($commitlist, $from, $to, $extra) = @_;
3755         $from = 0 unless defined $from;
3756         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3757
3758         print "<table class=\"commit_search\">\n";
3759         my $alternate = 1;
3760         for (my $i = $from; $i <= $to; $i++) {
3761                 my %co = %{$commitlist->[$i]};
3762                 if (!%co) {
3763                         next;
3764                 }
3765                 my $commit = $co{'id'};
3766                 if ($alternate) {
3767                         print "<tr class=\"dark\">\n";
3768                 } else {
3769                         print "<tr class=\"light\">\n";
3770                 }
3771                 $alternate ^= 1;
3772                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3773                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3774                       "<td><i>" . $author . "</i></td>\n" .
3775                       "<td>" .
3776                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3777                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3778                 my $comment = $co{'comment'};
3779                 foreach my $line (@$comment) {
3780                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3781                                 my $lead = esc_html($1) || "";
3782                                 $lead = chop_str($lead, 30, 10);
3783                                 my $match = esc_html($2) || "";
3784                                 my $trail = esc_html($3) || "";
3785                                 $trail = chop_str($trail, 30, 10);
3786                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3787                                 print chop_str($text, 80, 5) . "<br/>\n";
3788                         }
3789                 }
3790                 print "</td>\n" .
3791                       "<td class=\"link\">" .
3792                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3793                       " | " .
3794                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3795                       " | " .
3796                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3797                 print "</td>\n" .
3798                       "</tr>\n";
3799         }
3800         if (defined $extra) {
3801                 print "<tr>\n" .
3802                       "<td colspan=\"3\">$extra</td>\n" .
3803                       "</tr>\n";
3804         }
3805         print "</table>\n";
3806 }
3807
3808 ## ======================================================================
3809 ## ======================================================================
3810 ## actions
3811
3812 sub git_project_list {
3813         my $order = $cgi->param('o');
3814         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3815                 die_error(undef, "Unknown order parameter");
3816         }
3817
3818         my @list = git_get_projects_list();
3819         if (!@list) {
3820                 die_error(undef, "No projects found");
3821         }
3822
3823         git_header_html();
3824         if (-f $home_text) {
3825                 print "<div class=\"index_include\">\n";
3826                 open (my $fd, $home_text);
3827                 print <$fd>;
3828                 close $fd;
3829                 print "</div>\n";
3830         }
3831         git_project_list_body(\@list, $order);
3832         git_footer_html();
3833 }
3834
3835 sub git_forks {
3836         my $order = $cgi->param('o');
3837         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3838                 die_error(undef, "Unknown order parameter");
3839         }
3840
3841         my @list = git_get_projects_list($project);
3842         if (!@list) {
3843                 die_error(undef, "No forks found");
3844         }
3845
3846         git_header_html();
3847         git_print_page_nav('','');
3848         git_print_header_div('summary', "$project forks");
3849         git_project_list_body(\@list, $order);
3850         git_footer_html();
3851 }
3852
3853 sub git_project_index {
3854         my @projects = git_get_projects_list($project);
3855
3856         print $cgi->header(
3857                 -type => 'text/plain',
3858                 -charset => 'utf-8',
3859                 -content_disposition => 'inline; filename="index.aux"');
3860
3861         foreach my $pr (@projects) {
3862                 if (!exists $pr->{'owner'}) {
3863                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3864                 }
3865
3866                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3867                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3868                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3869                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3870                 $path  =~ s/ /\+/g;
3871                 $owner =~ s/ /\+/g;
3872
3873                 print "$path $owner\n";
3874         }
3875 }
3876
3877 sub git_summary {
3878         my $descr = git_get_project_description($project) || "none";
3879         my %co = parse_commit("HEAD");
3880         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3881         my $head = $co{'id'};
3882
3883         my $owner = git_get_project_owner($project);
3884
3885         my $refs = git_get_references();
3886         # These get_*_list functions return one more to allow us to see if
3887         # there are more ...
3888         my @taglist  = git_get_tags_list(16);
3889         my @headlist = git_get_heads_list(16);
3890         my @forklist;
3891         my ($check_forks) = gitweb_check_feature('forks');
3892
3893         if ($check_forks) {
3894                 @forklist = git_get_projects_list($project);
3895         }
3896
3897         git_header_html();
3898         git_print_page_nav('summary','', $head);
3899
3900         print "<div class=\"title\">&nbsp;</div>\n";
3901         print "<table class=\"projects_list\">\n" .
3902               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3903               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3904         if (defined $cd{'rfc2822'}) {
3905                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3906         }
3907
3908         # use per project git URL list in $projectroot/$project/cloneurl
3909         # or make project git URL from git base URL and project name
3910         my $url_tag = "URL";
3911         my @url_list = git_get_project_url_list($project);
3912         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3913         foreach my $git_url (@url_list) {
3914                 next unless $git_url;
3915                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3916                 $url_tag = "";
3917         }
3918         print "</table>\n";
3919
3920         if (-s "$projectroot/$project/README.html") {
3921                 if (open my $fd, "$projectroot/$project/README.html") {
3922                         print "<div class=\"title\">readme</div>\n" .
3923                               "<div class=\"readme\">\n";
3924                         print $_ while (<$fd>);
3925                         print "\n</div>\n"; # class="readme"
3926                         close $fd;
3927                 }
3928         }
3929
3930         # we need to request one more than 16 (0..15) to check if
3931         # those 16 are all
3932         my @commitlist = $head ? parse_commits($head, 17) : ();
3933         if (@commitlist) {
3934                 git_print_header_div('shortlog');
3935                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3936                                   $#commitlist <=  15 ? undef :
3937                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3938         }
3939
3940         if (@taglist) {
3941                 git_print_header_div('tags');
3942                 git_tags_body(\@taglist, 0, 15,
3943                               $#taglist <=  15 ? undef :
3944                               $cgi->a({-href => href(action=>"tags")}, "..."));
3945         }
3946
3947         if (@headlist) {
3948                 git_print_header_div('heads');
3949                 git_heads_body(\@headlist, $head, 0, 15,
3950                                $#headlist <= 15 ? undef :
3951                                $cgi->a({-href => href(action=>"heads")}, "..."));
3952         }
3953
3954         if (@forklist) {
3955                 git_print_header_div('forks');
3956                 git_project_list_body(\@forklist, undef, 0, 15,
3957                                       $#forklist <= 15 ? undef :
3958                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3959                                       'noheader');
3960         }
3961
3962         git_footer_html();
3963 }
3964
3965 sub git_tag {
3966         my $head = git_get_head_hash($project);
3967         git_header_html();
3968         git_print_page_nav('','', $head,undef,$head);
3969         my %tag = parse_tag($hash);
3970
3971         if (! %tag) {
3972                 die_error(undef, "Unknown tag object");
3973         }
3974
3975         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3976         print "<div class=\"title_text\">\n" .
3977               "<table class=\"object_header\">\n" .
3978               "<tr>\n" .
3979               "<td>object</td>\n" .
3980               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3981                                $tag{'object'}) . "</td>\n" .
3982               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3983                                               $tag{'type'}) . "</td>\n" .
3984               "</tr>\n";
3985         if (defined($tag{'author'})) {
3986                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3987                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3988                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3989                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3990                         "</td></tr>\n";
3991         }
3992         print "</table>\n\n" .
3993               "</div>\n";
3994         print "<div class=\"page_body\">";
3995         my $comment = $tag{'comment'};
3996         foreach my $line (@$comment) {
3997                 chomp $line;
3998                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3999         }
4000         print "</div>\n";
4001         git_footer_html();
4002 }
4003
4004 sub git_blame2 {
4005         my $fd;
4006         my $ftype;
4007
4008         my ($have_blame) = gitweb_check_feature('blame');
4009         if (!$have_blame) {
4010                 die_error('403 Permission denied', "Permission denied");
4011         }
4012         die_error('404 Not Found', "File name not defined") if (!$file_name);
4013         $hash_base ||= git_get_head_hash($project);
4014         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4015         my %co = parse_commit($hash_base)
4016                 or die_error(undef, "Reading commit failed");
4017         if (!defined $hash) {
4018                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4019                         or die_error(undef, "Error looking up file");
4020         }
4021         $ftype = git_get_type($hash);
4022         if ($ftype !~ "blob") {
4023                 die_error('400 Bad Request', "Object is not a blob");
4024         }
4025         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4026               $file_name, $hash_base)
4027                 or die_error(undef, "Open git-blame failed");
4028         git_header_html();
4029         my $formats_nav =
4030                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4031                         "blob") .
4032                 " | " .
4033                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4034                         "history") .
4035                 " | " .
4036                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4037                         "HEAD");
4038         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4039         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4040         git_print_page_path($file_name, $ftype, $hash_base);
4041         my @rev_color = (qw(light2 dark2));
4042         my $num_colors = scalar(@rev_color);
4043         my $current_color = 0;
4044         my $last_rev;
4045         print <<HTML;
4046 <div class="page_body">
4047 <table class="blame">
4048 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4049 HTML
4050         my %metainfo = ();
4051         while (1) {
4052                 $_ = <$fd>;
4053                 last unless defined $_;
4054                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4055                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4056                 if (!exists $metainfo{$full_rev}) {
4057                         $metainfo{$full_rev} = {};
4058                 }
4059                 my $meta = $metainfo{$full_rev};
4060                 while (<$fd>) {
4061                         last if (s/^\t//);
4062                         if (/^(\S+) (.*)$/) {
4063                                 $meta->{$1} = $2;
4064                         }
4065                 }
4066                 my $data = $_;
4067                 chomp $data;
4068                 my $rev = substr($full_rev, 0, 8);
4069                 my $author = $meta->{'author'};
4070                 my %date = parse_date($meta->{'author-time'},
4071                                       $meta->{'author-tz'});
4072                 my $date = $date{'iso-tz'};
4073                 if ($group_size) {
4074                         $current_color = ++$current_color % $num_colors;
4075                 }
4076                 print "<tr class=\"$rev_color[$current_color]\">\n";
4077                 if ($group_size) {
4078                         print "<td class=\"sha1\"";
4079                         print " title=\"". esc_html($author) . ", $date\"";
4080                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4081                         print ">";
4082                         print $cgi->a({-href => href(action=>"commit",
4083                                                      hash=>$full_rev,
4084                                                      file_name=>$file_name)},
4085                                       esc_html($rev));
4086                         print "</td>\n";
4087                 }
4088                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4089                         or die_error(undef, "Open git-rev-parse failed");
4090                 my $parent_commit = <$dd>;
4091                 close $dd;
4092                 chomp($parent_commit);
4093                 my $blamed = href(action => 'blame',
4094                                   file_name => $meta->{'filename'},
4095                                   hash_base => $parent_commit);
4096                 print "<td class=\"linenr\">";
4097                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4098                                 -id => "l$lineno",
4099                                 -class => "linenr" },
4100                               esc_html($lineno));
4101                 print "</td>";
4102                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4103                 print "</tr>\n";
4104         }
4105         print "</table>\n";
4106         print "</div>";
4107         close $fd
4108                 or print "Reading blob failed\n";
4109         git_footer_html();
4110 }
4111
4112 sub git_blame {
4113         my $fd;
4114
4115         my ($have_blame) = gitweb_check_feature('blame');
4116         if (!$have_blame) {
4117                 die_error('403 Permission denied', "Permission denied");
4118         }
4119         die_error('404 Not Found', "File name not defined") if (!$file_name);
4120         $hash_base ||= git_get_head_hash($project);
4121         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4122         my %co = parse_commit($hash_base)
4123                 or die_error(undef, "Reading commit failed");
4124         if (!defined $hash) {
4125                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4126                         or die_error(undef, "Error lookup file");
4127         }
4128         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4129                 or die_error(undef, "Open git-annotate failed");
4130         git_header_html();
4131         my $formats_nav =
4132                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4133                         "blob") .
4134                 " | " .
4135                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4136                         "history") .
4137                 " | " .
4138                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4139                         "HEAD");
4140         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4141         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4142         git_print_page_path($file_name, 'blob', $hash_base);
4143         print "<div class=\"page_body\">\n";
4144         print <<HTML;
4145 <table class="blame">
4146   <tr>
4147     <th>Commit</th>
4148     <th>Age</th>
4149     <th>Author</th>
4150     <th>Line</th>
4151     <th>Data</th>
4152   </tr>
4153 HTML
4154         my @line_class = (qw(light dark));
4155         my $line_class_len = scalar (@line_class);
4156         my $line_class_num = $#line_class;
4157         while (my $line = <$fd>) {
4158                 my $long_rev;
4159                 my $short_rev;
4160                 my $author;
4161                 my $time;
4162                 my $lineno;
4163                 my $data;
4164                 my $age;
4165                 my $age_str;
4166                 my $age_class;
4167
4168                 chomp $line;
4169                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4170
4171                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4172                         $long_rev = $1;
4173                         $author   = $2;
4174                         $time     = $3;
4175                         $lineno   = $4;
4176                         $data     = $5;
4177                 } else {
4178                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4179                         next;
4180                 }
4181                 $short_rev  = substr ($long_rev, 0, 8);
4182                 $age        = time () - $time;
4183                 $age_str    = age_string ($age);
4184                 $age_str    =~ s/ /&nbsp;/g;
4185                 $age_class  = age_class($age);
4186                 $author     = esc_html ($author);
4187                 $author     =~ s/ /&nbsp;/g;
4188
4189                 $data = untabify($data);
4190                 $data = esc_html ($data);
4191
4192                 print <<HTML;
4193   <tr class="$line_class[$line_class_num]">
4194     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4195     <td class="$age_class">$age_str</td>
4196     <td>$author</td>
4197     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4198     <td class="pre">$data</td>
4199   </tr>
4200 HTML
4201         } # while (my $line = <$fd>)
4202         print "</table>\n\n";
4203         close $fd
4204                 or print "Reading blob failed.\n";
4205         print "</div>";
4206         git_footer_html();
4207 }
4208
4209 sub git_tags {
4210         my $head = git_get_head_hash($project);
4211         git_header_html();
4212         git_print_page_nav('','', $head,undef,$head);
4213         git_print_header_div('summary', $project);
4214
4215         my @tagslist = git_get_tags_list();
4216         if (@tagslist) {
4217                 git_tags_body(\@tagslist);
4218         }
4219         git_footer_html();
4220 }
4221
4222 sub git_heads {
4223         my $head = git_get_head_hash($project);
4224         git_header_html();
4225         git_print_page_nav('','', $head,undef,$head);
4226         git_print_header_div('summary', $project);
4227
4228         my @headslist = git_get_heads_list();
4229         if (@headslist) {
4230                 git_heads_body(\@headslist, $head);
4231         }
4232         git_footer_html();
4233 }
4234
4235 sub git_blob_plain {
4236         my $expires;
4237
4238         if (!defined $hash) {
4239                 if (defined $file_name) {
4240                         my $base = $hash_base || git_get_head_hash($project);
4241                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4242                                 or die_error(undef, "Error lookup file");
4243                 } else {
4244                         die_error(undef, "No file name defined");
4245                 }
4246         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4247                 # blobs defined by non-textual hash id's can be cached
4248                 $expires = "+1d";
4249         }
4250
4251         my $type = shift;
4252         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4253                 or die_error(undef, "Couldn't cat $file_name, $hash");
4254
4255         $type ||= blob_mimetype($fd, $file_name);
4256
4257         # save as filename, even when no $file_name is given
4258         my $save_as = "$hash";
4259         if (defined $file_name) {
4260                 $save_as = $file_name;
4261         } elsif ($type =~ m/^text\//) {
4262                 $save_as .= '.txt';
4263         }
4264
4265         print $cgi->header(
4266                 -type => "$type",
4267                 -expires=>$expires,
4268                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4269         undef $/;
4270         binmode STDOUT, ':raw';
4271         print <$fd>;
4272         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4273         $/ = "\n";
4274         close $fd;
4275 }
4276
4277 sub git_blob {
4278         my $expires;
4279
4280         if (!defined $hash) {
4281                 if (defined $file_name) {
4282                         my $base = $hash_base || git_get_head_hash($project);
4283                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4284                                 or die_error(undef, "Error lookup file");
4285                 } else {
4286                         die_error(undef, "No file name defined");
4287                 }
4288         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4289                 # blobs defined by non-textual hash id's can be cached
4290                 $expires = "+1d";
4291         }
4292
4293         my ($have_blame) = gitweb_check_feature('blame');
4294         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4295                 or die_error(undef, "Couldn't cat $file_name, $hash");
4296         my $mimetype = blob_mimetype($fd, $file_name);
4297         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4298                 close $fd;
4299                 return git_blob_plain($mimetype);
4300         }
4301         # we can have blame only for text/* mimetype
4302         $have_blame &&= ($mimetype =~ m!^text/!);
4303
4304         git_header_html(undef, $expires);
4305         my $formats_nav = '';
4306         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4307                 if (defined $file_name) {
4308                         if ($have_blame) {
4309                                 $formats_nav .=
4310                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4311                                                 "blame") .
4312                                         " | ";
4313                         }
4314                         $formats_nav .=
4315                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4316                                         "history") .
4317                                 " | " .
4318                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4319                                         "raw") .
4320                                 " | " .
4321                                 $cgi->a({-href => href(action=>"blob",
4322                                                        hash_base=>"HEAD", file_name=>$file_name)},
4323                                         "HEAD");
4324                 } else {
4325                         $formats_nav .=
4326                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4327                                         "raw");
4328                 }
4329                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4330                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4331         } else {
4332                 print "<div class=\"page_nav\">\n" .
4333                       "<br/><br/></div>\n" .
4334                       "<div class=\"title\">$hash</div>\n";
4335         }
4336         git_print_page_path($file_name, "blob", $hash_base);
4337         print "<div class=\"page_body\">\n";
4338         if ($mimetype =~ m!^image/!) {
4339                 print qq!<img type="$mimetype"!;
4340                 if ($file_name) {
4341                         print qq! alt="$file_name" title="$file_name"!;
4342                 }
4343                 print qq! src="! .
4344                       href(action=>"blob_plain", hash=>$hash,
4345                            hash_base=>$hash_base, file_name=>$file_name) .
4346                       qq!" />\n!;
4347         } else {
4348                 my $nr;
4349                 while (my $line = <$fd>) {
4350                         chomp $line;
4351                         $nr++;
4352                         $line = untabify($line);
4353                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4354                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4355                 }
4356         }
4357         close $fd
4358                 or print "Reading blob failed.\n";
4359         print "</div>";
4360         git_footer_html();
4361 }
4362
4363 sub git_tree {
4364         if (!defined $hash_base) {
4365                 $hash_base = "HEAD";
4366         }
4367         if (!defined $hash) {
4368                 if (defined $file_name) {
4369                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4370                 } else {
4371                         $hash = $hash_base;
4372                 }
4373         }
4374         $/ = "\0";
4375         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4376                 or die_error(undef, "Open git-ls-tree failed");
4377         my @entries = map { chomp; $_ } <$fd>;
4378         close $fd or die_error(undef, "Reading tree failed");
4379         $/ = "\n";
4380
4381         my $refs = git_get_references();
4382         my $ref = format_ref_marker($refs, $hash_base);
4383         git_header_html();
4384         my $basedir = '';
4385         my ($have_blame) = gitweb_check_feature('blame');
4386         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4387                 my @views_nav = ();
4388                 if (defined $file_name) {
4389                         push @views_nav,
4390                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4391                                         "history"),
4392                                 $cgi->a({-href => href(action=>"tree",
4393                                                        hash_base=>"HEAD", file_name=>$file_name)},
4394                                         "HEAD"),
4395                 }
4396                 my $snapshot_links = format_snapshot_links($hash);
4397                 if (defined $snapshot_links) {
4398                         # FIXME: Should be available when we have no hash base as well.
4399                         push @views_nav, $snapshot_links;
4400                 }
4401                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4402                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4403         } else {
4404                 undef $hash_base;
4405                 print "<div class=\"page_nav\">\n";
4406                 print "<br/><br/></div>\n";
4407                 print "<div class=\"title\">$hash</div>\n";
4408         }
4409         if (defined $file_name) {
4410                 $basedir = $file_name;
4411                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4412                         $basedir .= '/';
4413                 }
4414         }
4415         git_print_page_path($file_name, 'tree', $hash_base);
4416         print "<div class=\"page_body\">\n";
4417         print "<table class=\"tree\">\n";
4418         my $alternate = 1;
4419         # '..' (top directory) link if possible
4420         if (defined $hash_base &&
4421             defined $file_name && $file_name =~ m![^/]+$!) {
4422                 if ($alternate) {
4423                         print "<tr class=\"dark\">\n";
4424                 } else {
4425                         print "<tr class=\"light\">\n";
4426                 }
4427                 $alternate ^= 1;
4428
4429                 my $up = $file_name;
4430                 $up =~ s!/?[^/]+$!!;
4431                 undef $up unless $up;
4432                 # based on git_print_tree_entry
4433                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4434                 print '<td class="list">';
4435                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4436                                              file_name=>$up)},
4437                               "..");
4438                 print "</td>\n";
4439                 print "<td class=\"link\"></td>\n";
4440
4441                 print "</tr>\n";
4442         }
4443         foreach my $line (@entries) {
4444                 my %t = parse_ls_tree_line($line, -z => 1);
4445
4446                 if ($alternate) {
4447                         print "<tr class=\"dark\">\n";
4448                 } else {
4449                         print "<tr class=\"light\">\n";
4450                 }
4451                 $alternate ^= 1;
4452
4453                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4454
4455                 print "</tr>\n";
4456         }
4457         print "</table>\n" .
4458               "</div>";
4459         git_footer_html();
4460 }
4461
4462 sub git_snapshot {
4463         my @supported_fmts = gitweb_check_feature('snapshot');
4464         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4465
4466         my $format = $cgi->param('sf');
4467         if (!@supported_fmts) {
4468                 die_error('403 Permission denied', "Permission denied");
4469         }
4470         # default to first supported snapshot format
4471         $format ||= $supported_fmts[0];
4472         if ($format !~ m/^[a-z0-9]+$/) {
4473                 die_error(undef, "Invalid snapshot format parameter");
4474         } elsif (!exists($known_snapshot_formats{$format})) {
4475                 die_error(undef, "Unknown snapshot format");
4476         } elsif (!grep($_ eq $format, @supported_fmts)) {
4477                 die_error(undef, "Unsupported snapshot format");
4478         }
4479
4480         if (!defined $hash) {
4481                 $hash = git_get_head_hash($project);
4482         }
4483
4484         my $git_command = git_cmd_str();
4485         my $name = $project;
4486         $name =~ s,([^/])/*\.git$,$1,;
4487         $name = basename($name);
4488         my $filename = to_utf8($name);
4489         $name =~ s/\047/\047\\\047\047/g;
4490         my $cmd;
4491         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4492         $cmd = "$git_command archive " .
4493                 "--format=$known_snapshot_formats{$format}{'format'} " .
4494                 "--prefix=\'$name\'/ $hash";
4495         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4496                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4497         }
4498
4499         print $cgi->header(
4500                 -type => $known_snapshot_formats{$format}{'type'},
4501                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4502                 -status => '200 OK');
4503
4504         open my $fd, "-|", $cmd
4505                 or die_error(undef, "Execute git-archive failed");
4506         binmode STDOUT, ':raw';
4507         print <$fd>;
4508         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4509         close $fd;
4510 }
4511
4512 sub git_log {
4513         my $head = git_get_head_hash($project);
4514         if (!defined $hash) {
4515                 $hash = $head;
4516         }
4517         if (!defined $page) {
4518                 $page = 0;
4519         }
4520         my $refs = git_get_references();
4521
4522         my @commitlist = parse_commits($hash, 101, (100 * $page));
4523
4524         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4525
4526         git_header_html();
4527         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4528
4529         if (!@commitlist) {
4530                 my %co = parse_commit($hash);
4531
4532                 git_print_header_div('summary', $project);
4533                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4534         }
4535         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4536         for (my $i = 0; $i <= $to; $i++) {
4537                 my %co = %{$commitlist[$i]};
4538                 next if !%co;
4539                 my $commit = $co{'id'};
4540                 my $ref = format_ref_marker($refs, $commit);
4541                 my %ad = parse_date($co{'author_epoch'});
4542                 git_print_header_div('commit',
4543                                "<span class=\"age\">$co{'age_string'}</span>" .
4544                                esc_html($co{'title'}) . $ref,
4545                                $commit);
4546                 print "<div class=\"title_text\">\n" .
4547                       "<div class=\"log_link\">\n" .
4548                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4549                       " | " .
4550                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4551                       " | " .
4552                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4553                       "<br/>\n" .
4554                       "</div>\n" .
4555                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4556                       "</div>\n";
4557
4558                 print "<div class=\"log_body\">\n";
4559                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4560                 print "</div>\n";
4561         }
4562         if ($#commitlist >= 100) {
4563                 print "<div class=\"page_nav\">\n";
4564                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4565                                -accesskey => "n", -title => "Alt-n"}, "next");
4566                 print "</div>\n";
4567         }
4568         git_footer_html();
4569 }
4570
4571 sub git_commit {
4572         $hash ||= $hash_base || "HEAD";
4573         my %co = parse_commit($hash);
4574         if (!%co) {
4575                 die_error(undef, "Unknown commit object");
4576         }
4577         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4578         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4579
4580         my $parent  = $co{'parent'};
4581         my $parents = $co{'parents'}; # listref
4582
4583         # we need to prepare $formats_nav before any parameter munging
4584         my $formats_nav;
4585         if (!defined $parent) {
4586                 # --root commitdiff
4587                 $formats_nav .= '(initial)';
4588         } elsif (@$parents == 1) {
4589                 # single parent commit
4590                 $formats_nav .=
4591                         '(parent: ' .
4592                         $cgi->a({-href => href(action=>"commit",
4593                                                hash=>$parent)},
4594                                 esc_html(substr($parent, 0, 7))) .
4595                         ')';
4596         } else {
4597                 # merge commit
4598                 $formats_nav .=
4599                         '(merge: ' .
4600                         join(' ', map {
4601                                 $cgi->a({-href => href(action=>"commit",
4602                                                        hash=>$_)},
4603                                         esc_html(substr($_, 0, 7)));
4604                         } @$parents ) .
4605                         ')';
4606         }
4607
4608         if (!defined $parent) {
4609                 $parent = "--root";
4610         }
4611         my @difftree;
4612         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4613                 @diff_opts,
4614                 (@$parents <= 1 ? $parent : '-c'),
4615                 $hash, "--"
4616                 or die_error(undef, "Open git-diff-tree failed");
4617         @difftree = map { chomp; $_ } <$fd>;
4618         close $fd or die_error(undef, "Reading git-diff-tree failed");
4619
4620         # non-textual hash id's can be cached
4621         my $expires;
4622         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4623                 $expires = "+1d";
4624         }
4625         my $refs = git_get_references();
4626         my $ref = format_ref_marker($refs, $co{'id'});
4627
4628         git_header_html(undef, $expires);
4629         git_print_page_nav('commit', '',
4630                            $hash, $co{'tree'}, $hash,
4631                            $formats_nav);
4632
4633         if (defined $co{'parent'}) {
4634                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4635         } else {
4636                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4637         }
4638         print "<div class=\"title_text\">\n" .
4639               "<table class=\"object_header\">\n";
4640         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4641               "<tr>" .
4642               "<td></td><td> $ad{'rfc2822'}";
4643         if ($ad{'hour_local'} < 6) {
4644                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4645                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4646         } else {
4647                 printf(" (%02d:%02d %s)",
4648                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4649         }
4650         print "</td>" .
4651               "</tr>\n";
4652         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4653         print "<tr><td></td><td> $cd{'rfc2822'}" .
4654               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4655               "</td></tr>\n";
4656         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4657         print "<tr>" .
4658               "<td>tree</td>" .
4659               "<td class=\"sha1\">" .
4660               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4661                        class => "list"}, $co{'tree'}) .
4662               "</td>" .
4663               "<td class=\"link\">" .
4664               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4665                       "tree");
4666         my $snapshot_links = format_snapshot_links($hash);
4667         if (defined $snapshot_links) {
4668                 print " | " . $snapshot_links;
4669         }
4670         print "</td>" .
4671               "</tr>\n";
4672
4673         foreach my $par (@$parents) {
4674                 print "<tr>" .
4675                       "<td>parent</td>" .
4676                       "<td class=\"sha1\">" .
4677                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4678                                class => "list"}, $par) .
4679                       "</td>" .
4680                       "<td class=\"link\">" .
4681                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4682                       " | " .
4683                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4684                       "</td>" .
4685                       "</tr>\n";
4686         }
4687         print "</table>".
4688               "</div>\n";
4689
4690         print "<div class=\"page_body\">\n";
4691         git_print_log($co{'comment'});
4692         print "</div>\n";
4693
4694         git_difftree_body(\@difftree, $hash, @$parents);
4695
4696         git_footer_html();
4697 }
4698
4699 sub git_object {
4700         # object is defined by:
4701         # - hash or hash_base alone
4702         # - hash_base and file_name
4703         my $type;
4704
4705         # - hash or hash_base alone
4706         if ($hash || ($hash_base && !defined $file_name)) {
4707                 my $object_id = $hash || $hash_base;
4708
4709                 my $git_command = git_cmd_str();
4710                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4711                         or die_error('404 Not Found', "Object does not exist");
4712                 $type = <$fd>;
4713                 chomp $type;
4714                 close $fd
4715                         or die_error('404 Not Found', "Object does not exist");
4716
4717         # - hash_base and file_name
4718         } elsif ($hash_base && defined $file_name) {
4719                 $file_name =~ s,/+$,,;
4720
4721                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4722                         or die_error('404 Not Found', "Base object does not exist");
4723
4724                 # here errors should not hapen
4725                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4726                         or die_error(undef, "Open git-ls-tree failed");
4727                 my $line = <$fd>;
4728                 close $fd;
4729
4730                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4731                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4732                         die_error('404 Not Found', "File or directory for given base does not exist");
4733                 }
4734                 $type = $2;
4735                 $hash = $3;
4736         } else {
4737                 die_error('404 Not Found', "Not enough information to find object");
4738         }
4739
4740         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4741                                           hash=>$hash, hash_base=>$hash_base,
4742                                           file_name=>$file_name),
4743                              -status => '302 Found');
4744 }
4745
4746 sub git_blobdiff {
4747         my $format = shift || 'html';
4748
4749         my $fd;
4750         my @difftree;
4751         my %diffinfo;
4752         my $expires;
4753
4754         # preparing $fd and %diffinfo for git_patchset_body
4755         # new style URI
4756         if (defined $hash_base && defined $hash_parent_base) {
4757                 if (defined $file_name) {
4758                         # read raw output
4759                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4760                                 $hash_parent_base, $hash_base,
4761                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4762                                 or die_error(undef, "Open git-diff-tree failed");
4763                         @difftree = map { chomp; $_ } <$fd>;
4764                         close $fd
4765                                 or die_error(undef, "Reading git-diff-tree failed");
4766                         @difftree
4767                                 or die_error('404 Not Found', "Blob diff not found");
4768
4769                 } elsif (defined $hash &&
4770                          $hash =~ /[0-9a-fA-F]{40}/) {
4771                         # try to find filename from $hash
4772
4773                         # read filtered raw output
4774                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4775                                 $hash_parent_base, $hash_base, "--"
4776                                 or die_error(undef, "Open git-diff-tree failed");
4777                         @difftree =
4778                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4779                                 # $hash == to_id
4780                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4781                                 map { chomp; $_ } <$fd>;
4782                         close $fd
4783                                 or die_error(undef, "Reading git-diff-tree failed");
4784                         @difftree
4785                                 or die_error('404 Not Found', "Blob diff not found");
4786
4787                 } else {
4788                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4789                 }
4790
4791                 if (@difftree > 1) {
4792                         die_error('404 Not Found', "Ambiguous blob diff specification");
4793                 }
4794
4795                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4796                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4797                 $file_name   ||= $diffinfo{'to_file'};
4798
4799                 $hash_parent ||= $diffinfo{'from_id'};
4800                 $hash        ||= $diffinfo{'to_id'};
4801
4802                 # non-textual hash id's can be cached
4803                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4804                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4805                         $expires = '+1d';
4806                 }
4807
4808                 # open patch output
4809                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4810                         '-p', ($format eq 'html' ? "--full-index" : ()),
4811                         $hash_parent_base, $hash_base,
4812                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4813                         or die_error(undef, "Open git-diff-tree failed");
4814         }
4815
4816         # old/legacy style URI
4817         if (!%diffinfo && # if new style URI failed
4818             defined $hash && defined $hash_parent) {
4819                 # fake git-diff-tree raw output
4820                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4821                 $diffinfo{'from_id'} = $hash_parent;
4822                 $diffinfo{'to_id'}   = $hash;
4823                 if (defined $file_name) {
4824                         if (defined $file_parent) {
4825                                 $diffinfo{'status'} = '2';
4826                                 $diffinfo{'from_file'} = $file_parent;
4827                                 $diffinfo{'to_file'}   = $file_name;
4828                         } else { # assume not renamed
4829                                 $diffinfo{'status'} = '1';
4830                                 $diffinfo{'from_file'} = $file_name;
4831                                 $diffinfo{'to_file'}   = $file_name;
4832                         }
4833                 } else { # no filename given
4834                         $diffinfo{'status'} = '2';
4835                         $diffinfo{'from_file'} = $hash_parent;
4836                         $diffinfo{'to_file'}   = $hash;
4837                 }
4838
4839                 # non-textual hash id's can be cached
4840                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4841                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4842                         $expires = '+1d';
4843                 }
4844
4845                 # open patch output
4846                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4847                         '-p', ($format eq 'html' ? "--full-index" : ()),
4848                         $hash_parent, $hash, "--"
4849                         or die_error(undef, "Open git-diff failed");
4850         } else  {
4851                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4852                         unless %diffinfo;
4853         }
4854
4855         # header
4856         if ($format eq 'html') {
4857                 my $formats_nav =
4858                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4859                                 "raw");
4860                 git_header_html(undef, $expires);
4861                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4862                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4863                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4864                 } else {
4865                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4866                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4867                 }
4868                 if (defined $file_name) {
4869                         git_print_page_path($file_name, "blob", $hash_base);
4870                 } else {
4871                         print "<div class=\"page_path\"></div>\n";
4872                 }
4873
4874         } elsif ($format eq 'plain') {
4875                 print $cgi->header(
4876                         -type => 'text/plain',
4877                         -charset => 'utf-8',
4878                         -expires => $expires,
4879                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4880
4881                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4882
4883         } else {
4884                 die_error(undef, "Unknown blobdiff format");
4885         }
4886
4887         # patch
4888         if ($format eq 'html') {
4889                 print "<div class=\"page_body\">\n";
4890
4891                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4892                 close $fd;
4893
4894                 print "</div>\n"; # class="page_body"
4895                 git_footer_html();
4896
4897         } else {
4898                 while (my $line = <$fd>) {
4899                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4900                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4901
4902                         print $line;
4903
4904                         last if $line =~ m!^\+\+\+!;
4905                 }
4906                 local $/ = undef;
4907                 print <$fd>;
4908                 close $fd;
4909         }
4910 }
4911
4912 sub git_blobdiff_plain {
4913         git_blobdiff('plain');
4914 }
4915
4916 sub git_commitdiff {
4917         my $format = shift || 'html';
4918         $hash ||= $hash_base || "HEAD";
4919         my %co = parse_commit($hash);
4920         if (!%co) {
4921                 die_error(undef, "Unknown commit object");
4922         }
4923
4924         # choose format for commitdiff for merge
4925         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4926                 $hash_parent = '--cc';
4927         }
4928         # we need to prepare $formats_nav before almost any parameter munging
4929         my $formats_nav;
4930         if ($format eq 'html') {
4931                 $formats_nav =
4932                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4933                                 "raw");
4934
4935                 if (defined $hash_parent &&
4936                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4937                         # commitdiff with two commits given
4938                         my $hash_parent_short = $hash_parent;
4939                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4940                                 $hash_parent_short = substr($hash_parent, 0, 7);
4941                         }
4942                         $formats_nav .=
4943                                 ' (from';
4944                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4945                                 if ($co{'parents'}[$i] eq $hash_parent) {
4946                                         $formats_nav .= ' parent ' . ($i+1);
4947                                         last;
4948                                 }
4949                         }
4950                         $formats_nav .= ': ' .
4951                                 $cgi->a({-href => href(action=>"commitdiff",
4952                                                        hash=>$hash_parent)},
4953                                         esc_html($hash_parent_short)) .
4954                                 ')';
4955                 } elsif (!$co{'parent'}) {
4956                         # --root commitdiff
4957                         $formats_nav .= ' (initial)';
4958                 } elsif (scalar @{$co{'parents'}} == 1) {
4959                         # single parent commit
4960                         $formats_nav .=
4961                                 ' (parent: ' .
4962                                 $cgi->a({-href => href(action=>"commitdiff",
4963                                                        hash=>$co{'parent'})},
4964                                         esc_html(substr($co{'parent'}, 0, 7))) .
4965                                 ')';
4966                 } else {
4967                         # merge commit
4968                         if ($hash_parent eq '--cc') {
4969                                 $formats_nav .= ' | ' .
4970                                         $cgi->a({-href => href(action=>"commitdiff",
4971                                                                hash=>$hash, hash_parent=>'-c')},
4972                                                 'combined');
4973                         } else { # $hash_parent eq '-c'
4974                                 $formats_nav .= ' | ' .
4975                                         $cgi->a({-href => href(action=>"commitdiff",
4976                                                                hash=>$hash, hash_parent=>'--cc')},
4977                                                 'compact');
4978                         }
4979                         $formats_nav .=
4980                                 ' (merge: ' .
4981                                 join(' ', map {
4982                                         $cgi->a({-href => href(action=>"commitdiff",
4983                                                                hash=>$_)},
4984                                                 esc_html(substr($_, 0, 7)));
4985                                 } @{$co{'parents'}} ) .
4986                                 ')';
4987                 }
4988         }
4989
4990         my $hash_parent_param = $hash_parent;
4991         if (!defined $hash_parent_param) {
4992                 # --cc for multiple parents, --root for parentless
4993                 $hash_parent_param =
4994                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4995         }
4996
4997         # read commitdiff
4998         my $fd;
4999         my @difftree;
5000         if ($format eq 'html') {
5001                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5002                         "--no-commit-id", "--patch-with-raw", "--full-index",
5003                         $hash_parent_param, $hash, "--"
5004                         or die_error(undef, "Open git-diff-tree failed");
5005
5006                 while (my $line = <$fd>) {
5007                         chomp $line;
5008                         # empty line ends raw part of diff-tree output
5009                         last unless $line;
5010                         push @difftree, scalar parse_difftree_raw_line($line);
5011                 }
5012
5013         } elsif ($format eq 'plain') {
5014                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5015                         '-p', $hash_parent_param, $hash, "--"
5016                         or die_error(undef, "Open git-diff-tree failed");
5017
5018         } else {
5019                 die_error(undef, "Unknown commitdiff format");
5020         }
5021
5022         # non-textual hash id's can be cached
5023         my $expires;
5024         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5025                 $expires = "+1d";
5026         }
5027
5028         # write commit message
5029         if ($format eq 'html') {
5030                 my $refs = git_get_references();
5031                 my $ref = format_ref_marker($refs, $co{'id'});
5032
5033                 git_header_html(undef, $expires);
5034                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5035                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5036                 git_print_authorship(\%co);
5037                 print "<div class=\"page_body\">\n";
5038                 if (@{$co{'comment'}} > 1) {
5039                         print "<div class=\"log\">\n";
5040                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5041                         print "</div>\n"; # class="log"
5042                 }
5043
5044         } elsif ($format eq 'plain') {
5045                 my $refs = git_get_references("tags");
5046                 my $tagname = git_get_rev_name_tags($hash);
5047                 my $filename = basename($project) . "-$hash.patch";
5048
5049                 print $cgi->header(
5050                         -type => 'text/plain',
5051                         -charset => 'utf-8',
5052                         -expires => $expires,
5053                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5054                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5055                 print "From: " . to_utf8($co{'author'}) . "\n";
5056                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5057                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5058
5059                 print "X-Git-Tag: $tagname\n" if $tagname;
5060                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5061
5062                 foreach my $line (@{$co{'comment'}}) {
5063                         print to_utf8($line) . "\n";
5064                 }
5065                 print "---\n\n";
5066         }
5067
5068         # write patch
5069         if ($format eq 'html') {
5070                 my $use_parents = !defined $hash_parent ||
5071                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5072                 git_difftree_body(\@difftree, $hash,
5073                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5074                 print "<br/>\n";
5075
5076                 git_patchset_body($fd, \@difftree, $hash,
5077                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5078                 close $fd;
5079                 print "</div>\n"; # class="page_body"
5080                 git_footer_html();
5081
5082         } elsif ($format eq 'plain') {
5083                 local $/ = undef;
5084                 print <$fd>;
5085                 close $fd
5086                         or print "Reading git-diff-tree failed\n";
5087         }
5088 }
5089
5090 sub git_commitdiff_plain {
5091         git_commitdiff('plain');
5092 }
5093
5094 sub git_history {
5095         if (!defined $hash_base) {
5096                 $hash_base = git_get_head_hash($project);
5097         }
5098         if (!defined $page) {
5099                 $page = 0;
5100         }
5101         my $ftype;
5102         my %co = parse_commit($hash_base);
5103         if (!%co) {
5104                 die_error(undef, "Unknown commit object");
5105         }
5106
5107         my $refs = git_get_references();
5108         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5109
5110         if (!defined $hash && defined $file_name) {
5111                 $hash = git_get_hash_by_path($hash_base, $file_name);
5112         }
5113         if (defined $hash) {
5114                 $ftype = git_get_type($hash);
5115         }
5116
5117         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5118
5119         my $paging_nav = '';
5120         if ($page > 0) {
5121                 $paging_nav .=
5122                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5123                                                file_name=>$file_name)},
5124                                 "first");
5125                 $paging_nav .= " &sdot; " .
5126                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5127                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5128         } else {
5129                 $paging_nav .= "first";
5130                 $paging_nav .= " &sdot; prev";
5131         }
5132         my $next_link = '';
5133         if ($#commitlist >= 100) {
5134                 $next_link =
5135                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5136                                  -accesskey => "n", -title => "Alt-n"}, "next");
5137                 $paging_nav .= " &sdot; $next_link";
5138         } else {
5139                 $paging_nav .= " &sdot; next";
5140         }
5141
5142         git_header_html();
5143         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5144         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5145         git_print_page_path($file_name, $ftype, $hash_base);
5146
5147         git_history_body(\@commitlist, 0, 99,
5148                          $refs, $hash_base, $ftype, $next_link);
5149
5150         git_footer_html();
5151 }
5152
5153 sub git_search {
5154         my ($have_search) = gitweb_check_feature('search');
5155         if (!$have_search) {
5156                 die_error('403 Permission denied', "Permission denied");
5157         }
5158         if (!defined $searchtext) {
5159                 die_error(undef, "Text field empty");
5160         }
5161         if (!defined $hash) {
5162                 $hash = git_get_head_hash($project);
5163         }
5164         my %co = parse_commit($hash);
5165         if (!%co) {
5166                 die_error(undef, "Unknown commit object");
5167         }
5168         if (!defined $page) {
5169                 $page = 0;
5170         }
5171
5172         $searchtype ||= 'commit';
5173         if ($searchtype eq 'pickaxe') {
5174                 # pickaxe may take all resources of your box and run for several minutes
5175                 # with every query - so decide by yourself how public you make this feature
5176                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5177                 if (!$have_pickaxe) {
5178                         die_error('403 Permission denied', "Permission denied");
5179                 }
5180         }
5181         if ($searchtype eq 'grep') {
5182                 my ($have_grep) = gitweb_check_feature('grep');
5183                 if (!$have_grep) {
5184                         die_error('403 Permission denied', "Permission denied");
5185                 }
5186         }
5187
5188         git_header_html();
5189
5190         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5191                 my $greptype;
5192                 if ($searchtype eq 'commit') {
5193                         $greptype = "--grep=";
5194                 } elsif ($searchtype eq 'author') {
5195                         $greptype = "--author=";
5196                 } elsif ($searchtype eq 'committer') {
5197                         $greptype = "--committer=";
5198                 }
5199                 $greptype .= $search_regexp;
5200                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5201
5202                 my $paging_nav = '';
5203                 if ($page > 0) {
5204                         $paging_nav .=
5205                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5206                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5207                                         "first");
5208                         $paging_nav .= " &sdot; " .
5209                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5210                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5211                 } else {
5212                         $paging_nav .= "first";
5213                         $paging_nav .= " &sdot; prev";
5214                 }
5215                 my $next_link = '';
5216                 if ($#commitlist >= 100) {
5217                         $next_link =
5218                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5219                                          -accesskey => "n", -title => "Alt-n"}, "next");
5220                         $paging_nav .= " &sdot; $next_link";
5221                 } else {
5222                         $paging_nav .= " &sdot; next";
5223                 }
5224
5225                 if ($#commitlist >= 100) {
5226                 }
5227
5228                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5229                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5230                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5231         }
5232
5233         if ($searchtype eq 'pickaxe') {
5234                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5235                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5236
5237                 print "<table class=\"pickaxe search\">\n";
5238                 my $alternate = 1;
5239                 $/ = "\n";
5240                 my $git_command = git_cmd_str();
5241                 my $searchqtext = $searchtext;
5242                 $searchqtext =~ s/'/'\\''/;
5243                 open my $fd, "-|", "$git_command rev-list $hash | " .
5244                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5245                 undef %co;
5246                 my @files;
5247                 while (my $line = <$fd>) {
5248                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5249                                 my %set;
5250                                 $set{'file'} = $6;
5251                                 $set{'from_id'} = $3;
5252                                 $set{'to_id'} = $4;
5253                                 $set{'id'} = $set{'to_id'};
5254                                 if ($set{'id'} =~ m/0{40}/) {
5255                                         $set{'id'} = $set{'from_id'};
5256                                 }
5257                                 if ($set{'id'} =~ m/0{40}/) {
5258                                         next;
5259                                 }
5260                                 push @files, \%set;
5261                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5262                                 if (%co) {
5263                                         if ($alternate) {
5264                                                 print "<tr class=\"dark\">\n";
5265                                         } else {
5266                                                 print "<tr class=\"light\">\n";
5267                                         }
5268                                         $alternate ^= 1;
5269                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5270                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5271                                               "<td><i>" . $author . "</i></td>\n" .
5272                                               "<td>" .
5273                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5274                                                       -class => "list subject"},
5275                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5276                                         while (my $setref = shift @files) {
5277                                                 my %set = %$setref;
5278                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5279                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5280                                                               -class => "list"},
5281                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5282                                                       "<br/>\n";
5283                                         }
5284                                         print "</td>\n" .
5285                                               "<td class=\"link\">" .
5286                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5287                                               " | " .
5288                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5289                                         print "</td>\n" .
5290                                               "</tr>\n";
5291                                 }
5292                                 %co = parse_commit($1);
5293                         }
5294                 }
5295                 close $fd;
5296
5297                 print "</table>\n";
5298         }
5299
5300         if ($searchtype eq 'grep') {
5301                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5302                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5303
5304                 print "<table class=\"grep_search\">\n";
5305                 my $alternate = 1;
5306                 my $matches = 0;
5307                 $/ = "\n";
5308                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5309                 my $lastfile = '';
5310                 while (my $line = <$fd>) {
5311                         chomp $line;
5312                         my ($file, $lno, $ltext, $binary);
5313                         last if ($matches++ > 1000);
5314                         if ($line =~ /^Binary file (.+) matches$/) {
5315                                 $file = $1;
5316                                 $binary = 1;
5317                         } else {
5318                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5319                         }
5320                         if ($file ne $lastfile) {
5321                                 $lastfile and print "</td></tr>\n";
5322                                 if ($alternate++) {
5323                                         print "<tr class=\"dark\">\n";
5324                                 } else {
5325                                         print "<tr class=\"light\">\n";
5326                                 }
5327                                 print "<td class=\"list\">".
5328                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5329                                                                file_name=>"$file"),
5330                                                 -class => "list"}, esc_path($file));
5331                                 print "</td><td>\n";
5332                                 $lastfile = $file;
5333                         }
5334                         if ($binary) {
5335                                 print "<div class=\"binary\">Binary file</div>\n";
5336                         } else {
5337                                 $ltext = untabify($ltext);
5338                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5339                                         $ltext = esc_html($1, -nbsp=>1);
5340                                         $ltext .= '<span class="match">';
5341                                         $ltext .= esc_html($2, -nbsp=>1);
5342                                         $ltext .= '</span>';
5343                                         $ltext .= esc_html($3, -nbsp=>1);
5344                                 } else {
5345                                         $ltext = esc_html($ltext, -nbsp=>1);
5346                                 }
5347                                 print "<div class=\"pre\">" .
5348                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5349                                                                file_name=>"$file").'#l'.$lno,
5350                                                 -class => "linenr"}, sprintf('%4i', $lno))
5351                                         . ' ' .  $ltext . "</div>\n";
5352                         }
5353                 }
5354                 if ($lastfile) {
5355                         print "</td></tr>\n";
5356                         if ($matches > 1000) {
5357                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5358                         }
5359                 } else {
5360                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5361                 }
5362                 close $fd;
5363
5364                 print "</table>\n";
5365         }
5366         git_footer_html();
5367 }
5368
5369 sub git_search_help {
5370         git_header_html();
5371         git_print_page_nav('','', $hash,$hash,$hash);
5372         print <<EOT;
5373 <dl>
5374 <dt><b>commit</b></dt>
5375 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5376 EOT
5377         my ($have_grep) = gitweb_check_feature('grep');
5378         if ($have_grep) {
5379                 print <<EOT;
5380 <dt><b>grep</b></dt>
5381 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5382     a different one) are searched for the given
5383 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5384 (POSIX extended) and the matches are listed. On large
5385 trees, this search can take a while and put some strain on the server, so please use it with
5386 some consideration.</dd>
5387 EOT
5388         }
5389         print <<EOT;
5390 <dt><b>author</b></dt>
5391 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5392 <dt><b>committer</b></dt>
5393 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5394 EOT
5395         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5396         if ($have_pickaxe) {
5397                 print <<EOT;
5398 <dt><b>pickaxe</b></dt>
5399 <dd>All commits that caused the string to appear or disappear from any file (changes that
5400 added, removed or "modified" the string) will be listed. This search can take a while and
5401 takes a lot of strain on the server, so please use it wisely.</dd>
5402 EOT
5403         }
5404         print "</dl>\n";
5405         git_footer_html();
5406 }
5407
5408 sub git_shortlog {
5409         my $head = git_get_head_hash($project);
5410         if (!defined $hash) {
5411                 $hash = $head;
5412         }
5413         if (!defined $page) {
5414                 $page = 0;
5415         }
5416         my $refs = git_get_references();
5417
5418         my @commitlist = parse_commits($hash, 101, (100 * $page));
5419
5420         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5421         my $next_link = '';
5422         if ($#commitlist >= 100) {
5423                 $next_link =
5424                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5425                                  -accesskey => "n", -title => "Alt-n"}, "next");
5426         }
5427
5428         git_header_html();
5429         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5430         git_print_header_div('summary', $project);
5431
5432         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5433
5434         git_footer_html();
5435 }
5436
5437 ## ......................................................................
5438 ## feeds (RSS, Atom; OPML)
5439
5440 sub git_feed {
5441         my $format = shift || 'atom';
5442         my ($have_blame) = gitweb_check_feature('blame');
5443
5444         # Atom: http://www.atomenabled.org/developers/syndication/
5445         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5446         if ($format ne 'rss' && $format ne 'atom') {
5447                 die_error(undef, "Unknown web feed format");
5448         }
5449
5450         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5451         my $head = $hash || 'HEAD';
5452         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5453
5454         my %latest_commit;
5455         my %latest_date;
5456         my $content_type = "application/$format+xml";
5457         if (defined $cgi->http('HTTP_ACCEPT') &&
5458                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5459                 # browser (feed reader) prefers text/xml
5460                 $content_type = 'text/xml';
5461         }
5462         if (defined($commitlist[0])) {
5463                 %latest_commit = %{$commitlist[0]};
5464                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5465                 print $cgi->header(
5466                         -type => $content_type,
5467                         -charset => 'utf-8',
5468                         -last_modified => $latest_date{'rfc2822'});
5469         } else {
5470                 print $cgi->header(
5471                         -type => $content_type,
5472                         -charset => 'utf-8');
5473         }
5474
5475         # Optimization: skip generating the body if client asks only
5476         # for Last-Modified date.
5477         return if ($cgi->request_method() eq 'HEAD');
5478
5479         # header variables
5480         my $title = "$site_name - $project/$action";
5481         my $feed_type = 'log';
5482         if (defined $hash) {
5483                 $title .= " - '$hash'";
5484                 $feed_type = 'branch log';
5485                 if (defined $file_name) {
5486                         $title .= " :: $file_name";
5487                         $feed_type = 'history';
5488                 }
5489         } elsif (defined $file_name) {
5490                 $title .= " - $file_name";
5491                 $feed_type = 'history';
5492         }
5493         $title .= " $feed_type";
5494         my $descr = git_get_project_description($project);
5495         if (defined $descr) {
5496                 $descr = esc_html($descr);
5497         } else {
5498                 $descr = "$project " .
5499                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5500                          " feed";
5501         }
5502         my $owner = git_get_project_owner($project);
5503         $owner = esc_html($owner);
5504
5505         #header
5506         my $alt_url;
5507         if (defined $file_name) {
5508                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5509         } elsif (defined $hash) {
5510                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5511         } else {
5512                 $alt_url = href(-full=>1, action=>"summary");
5513         }
5514         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5515         if ($format eq 'rss') {
5516                 print <<XML;
5517 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5518 <channel>
5519 XML
5520                 print "<title>$title</title>\n" .
5521                       "<link>$alt_url</link>\n" .
5522                       "<description>$descr</description>\n" .
5523                       "<language>en</language>\n";
5524         } elsif ($format eq 'atom') {
5525                 print <<XML;
5526 <feed xmlns="http://www.w3.org/2005/Atom">
5527 XML
5528                 print "<title>$title</title>\n" .
5529                       "<subtitle>$descr</subtitle>\n" .
5530                       '<link rel="alternate" type="text/html" href="' .
5531                       $alt_url . '" />' . "\n" .
5532                       '<link rel="self" type="' . $content_type . '" href="' .
5533                       $cgi->self_url() . '" />' . "\n" .
5534                       "<id>" . href(-full=>1) . "</id>\n" .
5535                       # use project owner for feed author
5536                       "<author><name>$owner</name></author>\n";
5537                 if (defined $favicon) {
5538                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5539                 }
5540                 if (defined $logo_url) {
5541                         # not twice as wide as tall: 72 x 27 pixels
5542                         print "<logo>" . esc_url($logo) . "</logo>\n";
5543                 }
5544                 if (! %latest_date) {
5545                         # dummy date to keep the feed valid until commits trickle in:
5546                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5547                 } else {
5548                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5549                 }
5550         }
5551
5552         # contents
5553         for (my $i = 0; $i <= $#commitlist; $i++) {
5554                 my %co = %{$commitlist[$i]};
5555                 my $commit = $co{'id'};
5556                 # we read 150, we always show 30 and the ones more recent than 48 hours
5557                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5558                         last;
5559                 }
5560                 my %cd = parse_date($co{'author_epoch'});
5561
5562                 # get list of changed files
5563                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5564                         $co{'parent'} || "--root",
5565                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5566                         or next;
5567                 my @difftree = map { chomp; $_ } <$fd>;
5568                 close $fd
5569                         or next;
5570
5571                 # print element (entry, item)
5572                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5573                 if ($format eq 'rss') {
5574                         print "<item>\n" .
5575                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5576                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5577                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5578                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5579                               "<link>$co_url</link>\n" .
5580                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5581                               "<content:encoded>" .
5582                               "<![CDATA[\n";
5583                 } elsif ($format eq 'atom') {
5584                         print "<entry>\n" .
5585                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5586                               "<updated>$cd{'iso-8601'}</updated>\n" .
5587                               "<author>\n" .
5588                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5589                         if ($co{'author_email'}) {
5590                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5591                         }
5592                         print "</author>\n" .
5593                               # use committer for contributor
5594                               "<contributor>\n" .
5595                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5596                         if ($co{'committer_email'}) {
5597                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5598                         }
5599                         print "</contributor>\n" .
5600                               "<published>$cd{'iso-8601'}</published>\n" .
5601                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5602                               "<id>$co_url</id>\n" .
5603                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5604                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5605                 }
5606                 my $comment = $co{'comment'};
5607                 print "<pre>\n";
5608                 foreach my $line (@$comment) {
5609                         $line = esc_html($line);
5610                         print "$line\n";
5611                 }
5612                 print "</pre><ul>\n";
5613                 foreach my $difftree_line (@difftree) {
5614                         my %difftree = parse_difftree_raw_line($difftree_line);
5615                         next if !$difftree{'from_id'};
5616
5617                         my $file = $difftree{'file'} || $difftree{'to_file'};
5618
5619                         print "<li>" .
5620                               "[" .
5621                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5622                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5623                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5624                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5625                                       -title => "diff"}, 'D');
5626                         if ($have_blame) {
5627                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5628                                                              file_name=>$file, hash_base=>$commit),
5629                                               -title => "blame"}, 'B');
5630                         }
5631                         # if this is not a feed of a file history
5632                         if (!defined $file_name || $file_name ne $file) {
5633                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5634                                                              file_name=>$file, hash=>$commit),
5635                                               -title => "history"}, 'H');
5636                         }
5637                         $file = esc_path($file);
5638                         print "] ".
5639                               "$file</li>\n";
5640                 }
5641                 if ($format eq 'rss') {
5642                         print "</ul>]]>\n" .
5643                               "</content:encoded>\n" .
5644                               "</item>\n";
5645                 } elsif ($format eq 'atom') {
5646                         print "</ul>\n</div>\n" .
5647                               "</content>\n" .
5648                               "</entry>\n";
5649                 }
5650         }
5651
5652         # end of feed
5653         if ($format eq 'rss') {
5654                 print "</channel>\n</rss>\n";
5655         }       elsif ($format eq 'atom') {
5656                 print "</feed>\n";
5657         }
5658 }
5659
5660 sub git_rss {
5661         git_feed('rss');
5662 }
5663
5664 sub git_atom {
5665         git_feed('atom');
5666 }
5667
5668 sub git_opml {
5669         my @list = git_get_projects_list();
5670
5671         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5672         print <<XML;
5673 <?xml version="1.0" encoding="utf-8"?>
5674 <opml version="1.0">
5675 <head>
5676   <title>$site_name OPML Export</title>
5677 </head>
5678 <body>
5679 <outline text="git RSS feeds">
5680 XML
5681
5682         foreach my $pr (@list) {
5683                 my %proj = %$pr;
5684                 my $head = git_get_head_hash($proj{'path'});
5685                 if (!defined $head) {
5686                         next;
5687                 }
5688                 $git_dir = "$projectroot/$proj{'path'}";
5689                 my %co = parse_commit($head);
5690                 if (!%co) {
5691                         next;
5692                 }
5693
5694                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5695                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5696                 my $html = "$my_url?p=$proj{'path'};a=summary";
5697                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5698         }
5699         print <<XML;
5700 </outline>
5701 </body>
5702 </opml>
5703 XML
5704 }