gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 373
 374 # version of the core git binary
 375 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 376
 377 $projects_list ||= $projectroot;
 378
 379 # ======================================================================
 380 # input validation and dispatch
 381 our $action = $cgi->param('a');
 382 if (defined $action) {
 383         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 384                 die_error(undef, "Invalid action parameter");
 385         }
 386 }
 387
 388 # parameters which are pathnames
 389 our $project = $cgi->param('p');
 390 if (defined $project) {
 391         if (!validate_pathname($project) ||
 392             !(-d "$projectroot/$project") ||
 393             !check_head_link("$projectroot/$project") ||
 394             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 395             ($strict_export && !project_in_list($project))) {
 396                 undef $project;
 397                 die_error(undef, "No such project");
 398         }
 399 }
 400
 401 our $file_name = $cgi->param('f');
 402 if (defined $file_name) {
 403         if (!validate_pathname($file_name)) {
 404                 die_error(undef, "Invalid file parameter");
 405         }
 406 }
 407
 408 our $file_parent = $cgi->param('fp');
 409 if (defined $file_parent) {
 410         if (!validate_pathname($file_parent)) {
 411                 die_error(undef, "Invalid file parent parameter");
 412         }
 413 }
 414
 415 # parameters which are refnames
 416 our $hash = $cgi->param('h');
 417 if (defined $hash) {
 418         if (!validate_refname($hash)) {
 419                 die_error(undef, "Invalid hash parameter");
 420         }
 421 }
 422
 423 our $hash_parent = $cgi->param('hp');
 424 if (defined $hash_parent) {
 425         if (!validate_refname($hash_parent)) {
 426                 die_error(undef, "Invalid hash parent parameter");
 427         }
 428 }
 429
 430 our $hash_base = $cgi->param('hb');
 431 if (defined $hash_base) {
 432         if (!validate_refname($hash_base)) {
 433                 die_error(undef, "Invalid hash base parameter");
 434         }
 435 }
 436
 437 my %allowed_options = (
 438         "--no-merges" => [ qw(rss atom log shortlog history) ],
 439 );
 440
 441 our @extra_options = $cgi->param('opt');
 442 if (defined @extra_options) {
 443         foreach my $opt (@extra_options) {
 444                 if (not exists $allowed_options{$opt}) {
 445                         die_error(undef, "Invalid option parameter");
 446                 }
 447                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 448                         die_error(undef, "Invalid option parameter for this action");
 449                 }
 450         }
 451 }
 452
 453 our $hash_parent_base = $cgi->param('hpb');
 454 if (defined $hash_parent_base) {
 455         if (!validate_refname($hash_parent_base)) {
 456                 die_error(undef, "Invalid hash parent base parameter");
 457         }
 458 }
 459
 460 # other parameters
 461 our $page = $cgi->param('pg');
 462 if (defined $page) {
 463         if ($page =~ m/[^0-9]/) {
 464                 die_error(undef, "Invalid page parameter");
 465         }
 466 }
 467
 468 our $searchtype = $cgi->param('st');
 469 if (defined $searchtype) {
 470         if ($searchtype =~ m/[^a-z]/) {
 471                 die_error(undef, "Invalid searchtype parameter");
 472         }
 473 }
 474
 475 our $searchtext = $cgi->param('s');
 476 our $search_regexp;
 477 if (defined $searchtext) {
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         $params{'project'} = $project unless exists $params{'project'};
 615
 616         if ($params{-replay}) {
 617                 while (my ($name, $symbol) = each %mapping) {
 618                         if (!exists $params{$name}) {
 619                                 # to allow for multivalued params we use arrayref form
 620                                 $params{$name} = [ $cgi->param($symbol) ];
 621                         }
 622                 }
 623         }
 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
1763         if (!defined $gitweb_project_owner) {
1764                 git_get_project_list_from_file();
1765         }
1766
1767         if (exists $gitweb_project_owner->{$project}) {
1768                 $owner = $gitweb_project_owner->{$project};
1769         }
1770         if (!defined $owner) {
1771                 $owner = get_file_owner("$projectroot/$project");
1772         }
1773
1774         return $owner;
1775 }
1776
1777 sub git_get_last_activity {
1778         my ($path) = @_;
1779         my $fd;
1780
1781         $git_dir = "$projectroot/$path";
1782         open($fd, "-|", git_cmd(), 'for-each-ref',
1783              '--format=%(committer)',
1784              '--sort=-committerdate',
1785              '--count=1',
1786              'refs/heads') or return;
1787         my $most_recent = <$fd>;
1788         close $fd or return;
1789         if (defined $most_recent &&
1790             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1791                 my $timestamp = $1;
1792                 my $age = time - $timestamp;
1793                 return ($age, age_string($age));
1794         }
1795         return (undef, undef);
1796 }
1797
1798 sub git_get_references {
1799         my $type = shift || "";
1800         my %refs;
1801         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1802         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1803         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1804                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1805                 or return;
1806
1807         while (my $line = <$fd>) {
1808                 chomp $line;
1809                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1810                         if (defined $refs{$1}) {
1811                                 push @{$refs{$1}}, $2;
1812                         } else {
1813                                 $refs{$1} = [ $2 ];
1814                         }
1815                 }
1816         }
1817         close $fd or return;
1818         return \%refs;
1819 }
1820
1821 sub git_get_rev_name_tags {
1822         my $hash = shift || return undef;
1823
1824         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1825                 or return;
1826         my $name_rev = <$fd>;
1827         close $fd;
1828
1829         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1830                 return $1;
1831         } else {
1832                 # catches also '$hash undefined' output
1833                 return undef;
1834         }
1835 }
1836
1837 ## ----------------------------------------------------------------------
1838 ## parse to hash functions
1839
1840 sub parse_date {
1841         my $epoch = shift;
1842         my $tz = shift || "-0000";
1843
1844         my %date;
1845         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1846         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1847         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1848         $date{'hour'} = $hour;
1849         $date{'minute'} = $min;
1850         $date{'mday'} = $mday;
1851         $date{'day'} = $days[$wday];
1852         $date{'month'} = $months[$mon];
1853         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1854                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1855         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1856                              $mday, $months[$mon], $hour ,$min;
1857         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1858                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1859
1860         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1861         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1862         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1863         $date{'hour_local'} = $hour;
1864         $date{'minute_local'} = $min;
1865         $date{'tz_local'} = $tz;
1866         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1867                                   1900+$year, $mon+1, $mday,
1868                                   $hour, $min, $sec, $tz);
1869         return %date;
1870 }
1871
1872 sub parse_tag {
1873         my $tag_id = shift;
1874         my %tag;
1875         my @comment;
1876
1877         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1878         $tag{'id'} = $tag_id;
1879         while (my $line = <$fd>) {
1880                 chomp $line;
1881                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1882                         $tag{'object'} = $1;
1883                 } elsif ($line =~ m/^type (.+)$/) {
1884                         $tag{'type'} = $1;
1885                 } elsif ($line =~ m/^tag (.+)$/) {
1886                         $tag{'name'} = $1;
1887                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1888                         $tag{'author'} = $1;
1889                         $tag{'epoch'} = $2;
1890                         $tag{'tz'} = $3;
1891                 } elsif ($line =~ m/--BEGIN/) {
1892                         push @comment, $line;
1893                         last;
1894                 } elsif ($line eq "") {
1895                         last;
1896                 }
1897         }
1898         push @comment, <$fd>;
1899         $tag{'comment'} = \@comment;
1900         close $fd or return;
1901         if (!defined $tag{'name'}) {
1902                 return
1903         };
1904         return %tag
1905 }
1906
1907 sub parse_commit_text {
1908         my ($commit_text, $withparents) = @_;
1909         my @commit_lines = split '\n', $commit_text;
1910         my %co;
1911
1912         pop @commit_lines; # Remove '\0'
1913
1914         if (! @commit_lines) {
1915                 return;
1916         }
1917
1918         my $header = shift @commit_lines;
1919         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1920                 return;
1921         }
1922         ($co{'id'}, my @parents) = split ' ', $header;
1923         while (my $line = shift @commit_lines) {
1924                 last if $line eq "\n";
1925                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1926                         $co{'tree'} = $1;
1927                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1928                         push @parents, $1;
1929                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1930                         $co{'author'} = $1;
1931                         $co{'author_epoch'} = $2;
1932                         $co{'author_tz'} = $3;
1933                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1934                                 $co{'author_name'}  = $1;
1935                                 $co{'author_email'} = $2;
1936                         } else {
1937                                 $co{'author_name'} = $co{'author'};
1938                         }
1939                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1940                         $co{'committer'} = $1;
1941                         $co{'committer_epoch'} = $2;
1942                         $co{'committer_tz'} = $3;
1943                         $co{'committer_name'} = $co{'committer'};
1944                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1945                                 $co{'committer_name'}  = $1;
1946                                 $co{'committer_email'} = $2;
1947                         } else {
1948                                 $co{'committer_name'} = $co{'committer'};
1949                         }
1950                 }
1951         }
1952         if (!defined $co{'tree'}) {
1953                 return;
1954         };
1955         $co{'parents'} = \@parents;
1956         $co{'parent'} = $parents[0];
1957
1958         foreach my $title (@commit_lines) {
1959                 $title =~ s/^    //;
1960                 if ($title ne "") {
1961                         $co{'title'} = chop_str($title, 80, 5);
1962                         # remove leading stuff of merges to make the interesting part visible
1963                         if (length($title) > 50) {
1964                                 $title =~ s/^Automatic //;
1965                                 $title =~ s/^merge (of|with) /Merge ... /i;
1966                                 if (length($title) > 50) {
1967                                         $title =~ s/(http|rsync):\/\///;
1968                                 }
1969                                 if (length($title) > 50) {
1970                                         $title =~ s/(master|www|rsync)\.//;
1971                                 }
1972                                 if (length($title) > 50) {
1973                                         $title =~ s/kernel.org:?//;
1974                                 }
1975                                 if (length($title) > 50) {
1976                                         $title =~ s/\/pub\/scm//;
1977                                 }
1978                         }
1979                         $co{'title_short'} = chop_str($title, 50, 5);
1980                         last;
1981                 }
1982         }
1983         if ($co{'title'} eq "") {
1984                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1985         }
1986         # remove added spaces
1987         foreach my $line (@commit_lines) {
1988                 $line =~ s/^    //;
1989         }
1990         $co{'comment'} = \@commit_lines;
1991
1992         my $age = time - $co{'committer_epoch'};
1993         $co{'age'} = $age;
1994         $co{'age_string'} = age_string($age);
1995         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1996         if ($age > 60*60*24*7*2) {
1997                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1998                 $co{'age_string_age'} = $co{'age_string'};
1999         } else {
2000                 $co{'age_string_date'} = $co{'age_string'};
2001                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2002         }
2003         return %co;
2004 }
2005
2006 sub parse_commit {
2007         my ($commit_id) = @_;
2008         my %co;
2009
2010         local $/ = "\0";
2011
2012         open my $fd, "-|", git_cmd(), "rev-list",
2013                 "--parents",
2014                 "--header",
2015                 "--max-count=1",
2016                 $commit_id,
2017                 "--",
2018                 or die_error(undef, "Open git-rev-list failed");
2019         %co = parse_commit_text(<$fd>, 1);
2020         close $fd;
2021
2022         return %co;
2023 }
2024
2025 sub parse_commits {
2026         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2027         my @cos;
2028
2029         $maxcount ||= 1;
2030         $skip ||= 0;
2031
2032         local $/ = "\0";
2033
2034         open my $fd, "-|", git_cmd(), "rev-list",
2035                 "--header",
2036                 ($arg ? ($arg) : ()),
2037                 ("--max-count=" . $maxcount),
2038                 ("--skip=" . $skip),
2039                 @extra_options,
2040                 $commit_id,
2041                 "--",
2042                 ($filename ? ($filename) : ())
2043                 or die_error(undef, "Open git-rev-list failed");
2044         while (my $line = <$fd>) {
2045                 my %co = parse_commit_text($line);
2046                 push @cos, \%co;
2047         }
2048         close $fd;
2049
2050         return wantarray ? @cos : \@cos;
2051 }
2052
2053 # parse ref from ref_file, given by ref_id, with given type
2054 sub parse_ref {
2055         my $ref_file = shift;
2056         my $ref_id = shift;
2057         my $type = shift || git_get_type($ref_id);
2058         my %ref_item;
2059
2060         $ref_item{'type'} = $type;
2061         $ref_item{'id'} = $ref_id;
2062         $ref_item{'epoch'} = 0;
2063         $ref_item{'age'} = "unknown";
2064         if ($type eq "tag") {
2065                 my %tag = parse_tag($ref_id);
2066                 $ref_item{'comment'} = $tag{'comment'};
2067                 if ($tag{'type'} eq "commit") {
2068                         my %co = parse_commit($tag{'object'});
2069                         $ref_item{'epoch'} = $co{'committer_epoch'};
2070                         $ref_item{'age'} = $co{'age_string'};
2071                 } elsif (defined($tag{'epoch'})) {
2072                         my $age = time - $tag{'epoch'};
2073                         $ref_item{'epoch'} = $tag{'epoch'};
2074                         $ref_item{'age'} = age_string($age);
2075                 }
2076                 $ref_item{'reftype'} = $tag{'type'};
2077                 $ref_item{'name'} = $tag{'name'};
2078                 $ref_item{'refid'} = $tag{'object'};
2079         } elsif ($type eq "commit"){
2080                 my %co = parse_commit($ref_id);
2081                 $ref_item{'reftype'} = "commit";
2082                 $ref_item{'name'} = $ref_file;
2083                 $ref_item{'title'} = $co{'title'};
2084                 $ref_item{'refid'} = $ref_id;
2085                 $ref_item{'epoch'} = $co{'committer_epoch'};
2086                 $ref_item{'age'} = $co{'age_string'};
2087         } else {
2088                 $ref_item{'reftype'} = $type;
2089                 $ref_item{'name'} = $ref_file;
2090                 $ref_item{'refid'} = $ref_id;
2091         }
2092
2093         return %ref_item;
2094 }
2095
2096 # parse line of git-diff-tree "raw" output
2097 sub parse_difftree_raw_line {
2098         my $line = shift;
2099         my %res;
2100
2101         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2102         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2103         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2104                 $res{'from_mode'} = $1;
2105                 $res{'to_mode'} = $2;
2106                 $res{'from_id'} = $3;
2107                 $res{'to_id'} = $4;
2108                 $res{'status'} = $res{'status_str'} = $5;
2109                 $res{'similarity'} = $6;
2110                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2111                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2112                 } else {
2113                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2114                 }
2115         }
2116         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2117         # combined diff (for merge commit)
2118         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2119                 $res{'nparents'}  = length($1);
2120                 $res{'from_mode'} = [ split(' ', $2) ];
2121                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2122                 $res{'from_id'} = [ split(' ', $3) ];
2123                 $res{'to_id'} = pop @{$res{'from_id'}};
2124                 $res{'status_str'} = $4;
2125                 $res{'status'} = [ split('', $4) ];
2126                 $res{'to_file'} = unquote($5);
2127         }
2128         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2129         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2130                 $res{'commit'} = $1;
2131         }
2132
2133         return wantarray ? %res : \%res;
2134 }
2135
2136 # wrapper: return parsed line of git-diff-tree "raw" output
2137 # (the argument might be raw line, or parsed info)
2138 sub parsed_difftree_line {
2139         my $line_or_ref = shift;
2140
2141         if (ref($line_or_ref) eq "HASH") {
2142                 # pre-parsed (or generated by hand)
2143                 return $line_or_ref;
2144         } else {
2145                 return parse_difftree_raw_line($line_or_ref);
2146         }
2147 }
2148
2149 # parse line of git-ls-tree output
2150 sub parse_ls_tree_line ($;%) {
2151         my $line = shift;
2152         my %opts = @_;
2153         my %res;
2154
2155         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2156         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2157
2158         $res{'mode'} = $1;
2159         $res{'type'} = $2;
2160         $res{'hash'} = $3;
2161         if ($opts{'-z'}) {
2162                 $res{'name'} = $4;
2163         } else {
2164                 $res{'name'} = unquote($4);
2165         }
2166
2167         return wantarray ? %res : \%res;
2168 }
2169
2170 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2171 sub parse_from_to_diffinfo {
2172         my ($diffinfo, $from, $to, @parents) = @_;
2173
2174         if ($diffinfo->{'nparents'}) {
2175                 # combined diff
2176                 $from->{'file'} = [];
2177                 $from->{'href'} = [];
2178                 fill_from_file_info($diffinfo, @parents)
2179                         unless exists $diffinfo->{'from_file'};
2180                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2181                         $from->{'file'}[$i] =
2182                                 defined $diffinfo->{'from_file'}[$i] ?
2183                                         $diffinfo->{'from_file'}[$i] :
2184                                         $diffinfo->{'to_file'};
2185                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2186                                 $from->{'href'}[$i] = href(action=>"blob",
2187                                                            hash_base=>$parents[$i],
2188                                                            hash=>$diffinfo->{'from_id'}[$i],
2189                                                            file_name=>$from->{'file'}[$i]);
2190                         } else {
2191                                 $from->{'href'}[$i] = undef;
2192                         }
2193                 }
2194         } else {
2195                 # ordinary (not combined) diff
2196                 $from->{'file'} = $diffinfo->{'from_file'};
2197                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2198                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2199                                                hash=>$diffinfo->{'from_id'},
2200                                                file_name=>$from->{'file'});
2201                 } else {
2202                         delete $from->{'href'};
2203                 }
2204         }
2205
2206         $to->{'file'} = $diffinfo->{'to_file'};
2207         if (!is_deleted($diffinfo)) { # file exists in result
2208                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2209                                      hash=>$diffinfo->{'to_id'},
2210                                      file_name=>$to->{'file'});
2211         } else {
2212                 delete $to->{'href'};
2213         }
2214 }
2215
2216 ## ......................................................................
2217 ## parse to array of hashes functions
2218
2219 sub git_get_heads_list {
2220         my $limit = shift;
2221         my @headslist;
2222
2223         open my $fd, '-|', git_cmd(), 'for-each-ref',
2224                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2225                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2226                 'refs/heads'
2227                 or return;
2228         while (my $line = <$fd>) {
2229                 my %ref_item;
2230
2231                 chomp $line;
2232                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2233                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2234                 my ($committer, $epoch, $tz) =
2235                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2236                 $ref_item{'fullname'}  = $name;
2237                 $name =~ s!^refs/heads/!!;
2238
2239                 $ref_item{'name'}  = $name;
2240                 $ref_item{'id'}    = $hash;
2241                 $ref_item{'title'} = $title || '(no commit message)';
2242                 $ref_item{'epoch'} = $epoch;
2243                 if ($epoch) {
2244                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2245                 } else {
2246                         $ref_item{'age'} = "unknown";
2247                 }
2248
2249                 push @headslist, \%ref_item;
2250         }
2251         close $fd;
2252
2253         return wantarray ? @headslist : \@headslist;
2254 }
2255
2256 sub git_get_tags_list {
2257         my $limit = shift;
2258         my @tagslist;
2259
2260         open my $fd, '-|', git_cmd(), 'for-each-ref',
2261                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2262                 '--format=%(objectname) %(objecttype) %(refname) '.
2263                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2264                 'refs/tags'
2265                 or return;
2266         while (my $line = <$fd>) {
2267                 my %ref_item;
2268
2269                 chomp $line;
2270                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2271                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2272                 my ($creator, $epoch, $tz) =
2273                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2274                 $ref_item{'fullname'} = $name;
2275                 $name =~ s!^refs/tags/!!;
2276
2277                 $ref_item{'type'} = $type;
2278                 $ref_item{'id'} = $id;
2279                 $ref_item{'name'} = $name;
2280                 if ($type eq "tag") {
2281                         $ref_item{'subject'} = $title;
2282                         $ref_item{'reftype'} = $reftype;
2283                         $ref_item{'refid'}   = $refid;
2284                 } else {
2285                         $ref_item{'reftype'} = $type;
2286                         $ref_item{'refid'}   = $id;
2287                 }
2288
2289                 if ($type eq "tag" || $type eq "commit") {
2290                         $ref_item{'epoch'} = $epoch;
2291                         if ($epoch) {
2292                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2293                         } else {
2294                                 $ref_item{'age'} = "unknown";
2295                         }
2296                 }
2297
2298                 push @tagslist, \%ref_item;
2299         }
2300         close $fd;
2301
2302         return wantarray ? @tagslist : \@tagslist;
2303 }
2304
2305 ## ----------------------------------------------------------------------
2306 ## filesystem-related functions
2307
2308 sub get_file_owner {
2309         my $path = shift;
2310
2311         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2312         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2313         if (!defined $gcos) {
2314                 return undef;
2315         }
2316         my $owner = $gcos;
2317         $owner =~ s/[,;].*$//;
2318         return to_utf8($owner);
2319 }
2320
2321 ## ......................................................................
2322 ## mimetype related functions
2323
2324 sub mimetype_guess_file {
2325         my $filename = shift;
2326         my $mimemap = shift;
2327         -r $mimemap or return undef;
2328
2329         my %mimemap;
2330         open(MIME, $mimemap) or return undef;
2331         while (<MIME>) {
2332                 next if m/^#/; # skip comments
2333                 my ($mime, $exts) = split(/\t+/);
2334                 if (defined $exts) {
2335                         my @exts = split(/\s+/, $exts);
2336                         foreach my $ext (@exts) {
2337                                 $mimemap{$ext} = $mime;
2338                         }
2339                 }
2340         }
2341         close(MIME);
2342
2343         $filename =~ /\.([^.]*)$/;
2344         return $mimemap{$1};
2345 }
2346
2347 sub mimetype_guess {
2348         my $filename = shift;
2349         my $mime;
2350         $filename =~ /\./ or return undef;
2351
2352         if ($mimetypes_file) {
2353                 my $file = $mimetypes_file;
2354                 if ($file !~ m!^/!) { # if it is relative path
2355                         # it is relative to project
2356                         $file = "$projectroot/$project/$file";
2357                 }
2358                 $mime = mimetype_guess_file($filename, $file);
2359         }
2360         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2361         return $mime;
2362 }
2363
2364 sub blob_mimetype {
2365         my $fd = shift;
2366         my $filename = shift;
2367
2368         if ($filename) {
2369                 my $mime = mimetype_guess($filename);
2370                 $mime and return $mime;
2371         }
2372
2373         # just in case
2374         return $default_blob_plain_mimetype unless $fd;
2375
2376         if (-T $fd) {
2377                 return 'text/plain' .
2378                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2379         } elsif (! $filename) {
2380                 return 'application/octet-stream';
2381         } elsif ($filename =~ m/\.png$/i) {
2382                 return 'image/png';
2383         } elsif ($filename =~ m/\.gif$/i) {
2384                 return 'image/gif';
2385         } elsif ($filename =~ m/\.jpe?g$/i) {
2386                 return 'image/jpeg';
2387         } else {
2388                 return 'application/octet-stream';
2389         }
2390 }
2391
2392 ## ======================================================================
2393 ## functions printing HTML: header, footer, error page
2394
2395 sub git_header_html {
2396         my $status = shift || "200 OK";
2397         my $expires = shift;
2398
2399         my $title = "$site_name";
2400         if (defined $project) {
2401                 $title .= " - " . to_utf8($project);
2402                 if (defined $action) {
2403                         $title .= "/$action";
2404                         if (defined $file_name) {
2405                                 $title .= " - " . esc_path($file_name);
2406                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2407                                         $title .= "/";
2408                                 }
2409                         }
2410                 }
2411         }
2412         my $content_type;
2413         # require explicit support from the UA if we are to send the page as
2414         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2415         # we have to do this because MSIE sometimes globs '*/*', pretending to
2416         # support xhtml+xml but choking when it gets what it asked for.
2417         if (defined $cgi->http('HTTP_ACCEPT') &&
2418             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2419             $cgi->Accept('application/xhtml+xml') != 0) {
2420                 $content_type = 'application/xhtml+xml';
2421         } else {
2422                 $content_type = 'text/html';
2423         }
2424         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2425                            -status=> $status, -expires => $expires);
2426         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2427         print <<EOF;
2428 <?xml version="1.0" encoding="utf-8"?>
2429 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2430 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2431 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2432 <!-- git core binaries version $git_version -->
2433 <head>
2434 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2435 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2436 <meta name="robots" content="index, nofollow"/>
2437 <title>$title</title>
2438 EOF
2439 # print out each stylesheet that exist
2440         if (defined $stylesheet) {
2441 #provides backwards capability for those people who define style sheet in a config file
2442                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2443         } else {
2444                 foreach my $stylesheet (@stylesheets) {
2445                         next unless $stylesheet;
2446                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2447                 }
2448         }
2449         if (defined $project) {
2450                 printf('<link rel="alternate" title="%s log RSS feed" '.
2451                        'href="%s" type="application/rss+xml" />'."\n",
2452                        esc_param($project), href(action=>"rss"));
2453                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2454                        'href="%s" type="application/rss+xml" />'."\n",
2455                        esc_param($project), href(action=>"rss",
2456                                                  extra_options=>"--no-merges"));
2457                 printf('<link rel="alternate" title="%s log Atom feed" '.
2458                        'href="%s" type="application/atom+xml" />'."\n",
2459                        esc_param($project), href(action=>"atom"));
2460                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2461                        'href="%s" type="application/atom+xml" />'."\n",
2462                        esc_param($project), href(action=>"atom",
2463                                                  extra_options=>"--no-merges"));
2464         } else {
2465                 printf('<link rel="alternate" title="%s projects list" '.
2466                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2467                        $site_name, href(project=>undef, action=>"project_index"));
2468                 printf('<link rel="alternate" title="%s projects feeds" '.
2469                        'href="%s" type="text/x-opml"/>'."\n",
2470                        $site_name, href(project=>undef, action=>"opml"));
2471         }
2472         if (defined $favicon) {
2473                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2474         }
2475
2476         print "</head>\n" .
2477               "<body>\n";
2478
2479         if (-f $site_header) {
2480                 open (my $fd, $site_header);
2481                 print <$fd>;
2482                 close $fd;
2483         }
2484
2485         print "<div class=\"page_header\">\n" .
2486               $cgi->a({-href => esc_url($logo_url),
2487                        -title => $logo_label},
2488                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2489         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2490         if (defined $project) {
2491                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2492                 if (defined $action) {
2493                         print " / $action";
2494                 }
2495                 print "\n";
2496         }
2497         print "</div>\n";
2498
2499         my ($have_search) = gitweb_check_feature('search');
2500         if ((defined $project) && ($have_search)) {
2501                 if (!defined $searchtext) {
2502                         $searchtext = "";
2503                 }
2504                 my $search_hash;
2505                 if (defined $hash_base) {
2506                         $search_hash = $hash_base;
2507                 } elsif (defined $hash) {
2508                         $search_hash = $hash;
2509                 } else {
2510                         $search_hash = "HEAD";
2511                 }
2512                 my $action = $my_uri;
2513                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2514                 if ($use_pathinfo) {
2515                         $action .= "/$project";
2516                 } else {
2517                         $cgi->param("p", $project);
2518                 }
2519                 $cgi->param("a", "search");
2520                 $cgi->param("h", $search_hash);
2521                 print $cgi->startform(-method => "get", -action => $action) .
2522                       "<div class=\"search\">\n" .
2523                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2524                       $cgi->hidden(-name => "a") . "\n" .
2525                       $cgi->hidden(-name => "h") . "\n" .
2526                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2527                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2528                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2529                       " search:\n",
2530                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2531                       "</div>" .
2532                       $cgi->end_form() . "\n";
2533         }
2534 }
2535
2536 sub git_footer_html {
2537         print "<div class=\"page_footer\">\n";
2538         if (defined $project) {
2539                 my $descr = git_get_project_description($project);
2540                 if (defined $descr) {
2541                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2542                 }
2543                 print $cgi->a({-href => href(action=>"rss"),
2544                               -class => "rss_logo"}, "RSS") . " ";
2545                 print $cgi->a({-href => href(action=>"atom"),
2546                               -class => "rss_logo"}, "Atom") . "\n";
2547         } else {
2548                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2549                               -class => "rss_logo"}, "OPML") . " ";
2550                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2551                               -class => "rss_logo"}, "TXT") . "\n";
2552         }
2553         print "</div>\n" ;
2554
2555         if (-f $site_footer) {
2556                 open (my $fd, $site_footer);
2557                 print <$fd>;
2558                 close $fd;
2559         }
2560
2561         print "</body>\n" .
2562               "</html>";
2563 }
2564
2565 sub die_error {
2566         my $status = shift || "403 Forbidden";
2567         my $error = shift || "Malformed query, file missing or permission denied";
2568
2569         git_header_html($status);
2570         print <<EOF;
2571 <div class="page_body">
2572 <br /><br />
2573 $status - $error
2574 <br />
2575 </div>
2576 EOF
2577         git_footer_html();
2578         exit;
2579 }
2580
2581 ## ----------------------------------------------------------------------
2582 ## functions printing or outputting HTML: navigation
2583
2584 sub git_print_page_nav {
2585         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2586         $extra = '' if !defined $extra; # pager or formats
2587
2588         my @navs = qw(summary shortlog log commit commitdiff tree);
2589         if ($suppress) {
2590                 @navs = grep { $_ ne $suppress } @navs;
2591         }
2592
2593         my %arg = map { $_ => {action=>$_} } @navs;
2594         if (defined $head) {
2595                 for (qw(commit commitdiff)) {
2596                         $arg{$_}{'hash'} = $head;
2597                 }
2598                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2599                         for (qw(shortlog log)) {
2600                                 $arg{$_}{'hash'} = $head;
2601                         }
2602                 }
2603         }
2604         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2605         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2606
2607         print "<div class=\"page_nav\">\n" .
2608                 (join " | ",
2609                  map { $_ eq $current ?
2610                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2611                  } @navs);
2612         print "<br/>\n$extra<br/>\n" .
2613               "</div>\n";
2614 }
2615
2616 sub format_paging_nav {
2617         my ($action, $hash, $head, $page, $nrevs) = @_;
2618         my $paging_nav;
2619
2620
2621         if ($hash ne $head || $page) {
2622                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2623         } else {
2624                 $paging_nav .= "HEAD";
2625         }
2626
2627         if ($page > 0) {
2628                 $paging_nav .= " &sdot; " .
2629                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2630                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2631         } else {
2632                 $paging_nav .= " &sdot; prev";
2633         }
2634
2635         if ($nrevs >= (100 * ($page+1)-1)) {
2636                 $paging_nav .= " &sdot; " .
2637                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2638                                  -accesskey => "n", -title => "Alt-n"}, "next");
2639         } else {
2640                 $paging_nav .= " &sdot; next";
2641         }
2642
2643         return $paging_nav;
2644 }
2645
2646 ## ......................................................................
2647 ## functions printing or outputting HTML: div
2648
2649 sub git_print_header_div {
2650         my ($action, $title, $hash, $hash_base) = @_;
2651         my %args = ();
2652
2653         $args{'action'} = $action;
2654         $args{'hash'} = $hash if $hash;
2655         $args{'hash_base'} = $hash_base if $hash_base;
2656
2657         print "<div class=\"header\">\n" .
2658               $cgi->a({-href => href(%args), -class => "title"},
2659               $title ? $title : $action) .
2660               "\n</div>\n";
2661 }
2662
2663 #sub git_print_authorship (\%) {
2664 sub git_print_authorship {
2665         my $co = shift;
2666
2667         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2668         print "<div class=\"author_date\">" .
2669               esc_html($co->{'author_name'}) .
2670               " [$ad{'rfc2822'}";
2671         if ($ad{'hour_local'} < 6) {
2672                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2673                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2674         } else {
2675                 printf(" (%02d:%02d %s)",
2676                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2677         }
2678         print "]</div>\n";
2679 }
2680
2681 sub git_print_page_path {
2682         my $name = shift;
2683         my $type = shift;
2684         my $hb = shift;
2685
2686
2687         print "<div class=\"page_path\">";
2688         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2689                       -title => 'tree root'}, to_utf8("[$project]"));
2690         print " / ";
2691         if (defined $name) {
2692                 my @dirname = split '/', $name;
2693                 my $basename = pop @dirname;
2694                 my $fullname = '';
2695
2696                 foreach my $dir (@dirname) {
2697                         $fullname .= ($fullname ? '/' : '') . $dir;
2698                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2699                                                      hash_base=>$hb),
2700                                       -title => $fullname}, esc_path($dir));
2701                         print " / ";
2702                 }
2703                 if (defined $type && $type eq 'blob') {
2704                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2705                                                      hash_base=>$hb),
2706                                       -title => $name}, esc_path($basename));
2707                 } elsif (defined $type && $type eq 'tree') {
2708                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2709                                                      hash_base=>$hb),
2710                                       -title => $name}, esc_path($basename));
2711                         print " / ";
2712                 } else {
2713                         print esc_path($basename);
2714                 }
2715         }
2716         print "<br/></div>\n";
2717 }
2718
2719 # sub git_print_log (\@;%) {
2720 sub git_print_log ($;%) {
2721         my $log = shift;
2722         my %opts = @_;
2723
2724         if ($opts{'-remove_title'}) {
2725                 # remove title, i.e. first line of log
2726                 shift @$log;
2727         }
2728         # remove leading empty lines
2729         while (defined $log->[0] && $log->[0] eq "") {
2730                 shift @$log;
2731         }
2732
2733         # print log
2734         my $signoff = 0;
2735         my $empty = 0;
2736         foreach my $line (@$log) {
2737                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2738                         $signoff = 1;
2739                         $empty = 0;
2740                         if (! $opts{'-remove_signoff'}) {
2741                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2742                                 next;
2743                         } else {
2744                                 # remove signoff lines
2745                                 next;
2746                         }
2747                 } else {
2748                         $signoff = 0;
2749                 }
2750
2751                 # print only one empty line
2752                 # do not print empty line after signoff
2753                 if ($line eq "") {
2754                         next if ($empty || $signoff);
2755                         $empty = 1;
2756                 } else {
2757                         $empty = 0;
2758                 }
2759
2760                 print format_log_line_html($line) . "<br/>\n";
2761         }
2762
2763         if ($opts{'-final_empty_line'}) {
2764                 # end with single empty line
2765                 print "<br/>\n" unless $empty;
2766         }
2767 }
2768
2769 # return link target (what link points to)
2770 sub git_get_link_target {
2771         my $hash = shift;
2772         my $link_target;
2773
2774         # read link
2775         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2776                 or return;
2777         {
2778                 local $/;
2779                 $link_target = <$fd>;
2780         }
2781         close $fd
2782                 or return;
2783
2784         return $link_target;
2785 }
2786
2787 # given link target, and the directory (basedir) the link is in,
2788 # return target of link relative to top directory (top tree);
2789 # return undef if it is not possible (including absolute links).
2790 sub normalize_link_target {
2791         my ($link_target, $basedir, $hash_base) = @_;
2792
2793         # we can normalize symlink target only if $hash_base is provided
2794         return unless $hash_base;
2795
2796         # absolute symlinks (beginning with '/') cannot be normalized
2797         return if (substr($link_target, 0, 1) eq '/');
2798
2799         # normalize link target to path from top (root) tree (dir)
2800         my $path;
2801         if ($basedir) {
2802                 $path = $basedir . '/' . $link_target;
2803         } else {
2804                 # we are in top (root) tree (dir)
2805                 $path = $link_target;
2806         }
2807
2808         # remove //, /./, and /../
2809         my @path_parts;
2810         foreach my $part (split('/', $path)) {
2811                 # discard '.' and ''
2812                 next if (!$part || $part eq '.');
2813                 # handle '..'
2814                 if ($part eq '..') {
2815                         if (@path_parts) {
2816                                 pop @path_parts;
2817                         } else {
2818                                 # link leads outside repository (outside top dir)
2819                                 return;
2820                         }
2821                 } else {
2822                         push @path_parts, $part;
2823                 }
2824         }
2825         $path = join('/', @path_parts);
2826
2827         return $path;
2828 }
2829
2830 # print tree entry (row of git_tree), but without encompassing <tr> element
2831 sub git_print_tree_entry {
2832         my ($t, $basedir, $hash_base, $have_blame) = @_;
2833
2834         my %base_key = ();
2835         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2836
2837         # The format of a table row is: mode list link.  Where mode is
2838         # the mode of the entry, list is the name of the entry, an href,
2839         # and link is the action links of the entry.
2840
2841         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2842         if ($t->{'type'} eq "blob") {
2843                 print "<td class=\"list\">" .
2844                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2845                                                file_name=>"$basedir$t->{'name'}", %base_key),
2846                                 -class => "list"}, esc_path($t->{'name'}));
2847                 if (S_ISLNK(oct $t->{'mode'})) {
2848                         my $link_target = git_get_link_target($t->{'hash'});
2849                         if ($link_target) {
2850                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2851                                 if (defined $norm_target) {
2852                                         print " -> " .
2853                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2854                                                                      file_name=>$norm_target),
2855                                                        -title => $norm_target}, esc_path($link_target));
2856                                 } else {
2857                                         print " -> " . esc_path($link_target);
2858                                 }
2859                         }
2860                 }
2861                 print "</td>\n";
2862                 print "<td class=\"link\">";
2863                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2864                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2865                               "blob");
2866                 if ($have_blame) {
2867                         print " | " .
2868                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2869                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2870                                       "blame");
2871                 }
2872                 if (defined $hash_base) {
2873                         print " | " .
2874                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2875                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2876                                       "history");
2877                 }
2878                 print " | " .
2879                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2880                                                file_name=>"$basedir$t->{'name'}")},
2881                                 "raw");
2882                 print "</td>\n";
2883
2884         } elsif ($t->{'type'} eq "tree") {
2885                 print "<td class=\"list\">";
2886                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2887                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2888                               esc_path($t->{'name'}));
2889                 print "</td>\n";
2890                 print "<td class=\"link\">";
2891                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2892                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2893                               "tree");
2894                 if (defined $hash_base) {
2895                         print " | " .
2896                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2897                                                      file_name=>"$basedir$t->{'name'}")},
2898                                       "history");
2899                 }
2900                 print "</td>\n";
2901         } else {
2902                 # unknown object: we can only present history for it
2903                 # (this includes 'commit' object, i.e. submodule support)
2904                 print "<td class=\"list\">" .
2905                       esc_path($t->{'name'}) .
2906                       "</td>\n";
2907                 print "<td class=\"link\">";
2908                 if (defined $hash_base) {
2909                         print $cgi->a({-href => href(action=>"history",
2910                                                      hash_base=>$hash_base,
2911                                                      file_name=>"$basedir$t->{'name'}")},
2912                                       "history");
2913                 }
2914                 print "</td>\n";
2915         }
2916 }
2917
2918 ## ......................................................................
2919 ## functions printing large fragments of HTML
2920
2921 # get pre-image filenames for merge (combined) diff
2922 sub fill_from_file_info {
2923         my ($diff, @parents) = @_;
2924
2925         $diff->{'from_file'} = [ ];
2926         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2927         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2928                 if ($diff->{'status'}[$i] eq 'R' ||
2929                     $diff->{'status'}[$i] eq 'C') {
2930                         $diff->{'from_file'}[$i] =
2931                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2932                 }
2933         }
2934
2935         return $diff;
2936 }
2937
2938 # is current raw difftree line of file deletion
2939 sub is_deleted {
2940         my $diffinfo = shift;
2941
2942         return $diffinfo->{'status_str'} =~ /D/;
2943 }
2944
2945 # does patch correspond to [previous] difftree raw line
2946 # $diffinfo  - hashref of parsed raw diff format
2947 # $patchinfo - hashref of parsed patch diff format
2948 #              (the same keys as in $diffinfo)
2949 sub is_patch_split {
2950         my ($diffinfo, $patchinfo) = @_;
2951
2952         return defined $diffinfo && defined $patchinfo
2953                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2954 }
2955
2956
2957 sub git_difftree_body {
2958         my ($difftree, $hash, @parents) = @_;
2959         my ($parent) = $parents[0];
2960         my ($have_blame) = gitweb_check_feature('blame');
2961         print "<div class=\"list_head\">\n";
2962         if ($#{$difftree} > 10) {
2963                 print(($#{$difftree} + 1) . " files changed:\n");
2964         }
2965         print "</div>\n";
2966
2967         print "<table class=\"" .
2968               (@parents > 1 ? "combined " : "") .
2969               "diff_tree\">\n";
2970
2971         # header only for combined diff in 'commitdiff' view
2972         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2973         if ($has_header) {
2974                 # table header
2975                 print "<thead><tr>\n" .
2976                        "<th></th><th></th>\n"; # filename, patchN link
2977                 for (my $i = 0; $i < @parents; $i++) {
2978                         my $par = $parents[$i];
2979                         print "<th>" .
2980                               $cgi->a({-href => href(action=>"commitdiff",
2981                                                      hash=>$hash, hash_parent=>$par),
2982                                        -title => 'commitdiff to parent number ' .
2983                                                   ($i+1) . ': ' . substr($par,0,7)},
2984                                       $i+1) .
2985                               "&nbsp;</th>\n";
2986                 }
2987                 print "</tr></thead>\n<tbody>\n";
2988         }
2989
2990         my $alternate = 1;
2991         my $patchno = 0;
2992         foreach my $line (@{$difftree}) {
2993                 my $diff = parsed_difftree_line($line);
2994
2995                 if ($alternate) {
2996                         print "<tr class=\"dark\">\n";
2997                 } else {
2998                         print "<tr class=\"light\">\n";
2999                 }
3000                 $alternate ^= 1;
3001
3002                 if (exists $diff->{'nparents'}) { # combined diff
3003
3004                         fill_from_file_info($diff, @parents)
3005                                 unless exists $diff->{'from_file'};
3006
3007                         if (!is_deleted($diff)) {
3008                                 # file exists in the result (child) commit
3009                                 print "<td>" .
3010                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3011                                                              file_name=>$diff->{'to_file'},
3012                                                              hash_base=>$hash),
3013                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3014                                       "</td>\n";
3015                         } else {
3016                                 print "<td>" .
3017                                       esc_path($diff->{'to_file'}) .
3018                                       "</td>\n";
3019                         }
3020
3021                         if ($action eq 'commitdiff') {
3022                                 # link to patch
3023                                 $patchno++;
3024                                 print "<td class=\"link\">" .
3025                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3026                                       " | " .
3027                                       "</td>\n";
3028                         }
3029
3030                         my $has_history = 0;
3031                         my $not_deleted = 0;
3032                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3033                                 my $hash_parent = $parents[$i];
3034                                 my $from_hash = $diff->{'from_id'}[$i];
3035                                 my $from_path = $diff->{'from_file'}[$i];
3036                                 my $status = $diff->{'status'}[$i];
3037
3038                                 $has_history ||= ($status ne 'A');
3039                                 $not_deleted ||= ($status ne 'D');
3040
3041                                 if ($status eq 'A') {
3042                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3043                                 } elsif ($status eq 'D') {
3044                                         print "<td class=\"link\">" .
3045                                               $cgi->a({-href => href(action=>"blob",
3046                                                                      hash_base=>$hash,
3047                                                                      hash=>$from_hash,
3048                                                                      file_name=>$from_path)},
3049                                                       "blob" . ($i+1)) .
3050                                               " | </td>\n";
3051                                 } else {
3052                                         if ($diff->{'to_id'} eq $from_hash) {
3053                                                 print "<td class=\"link nochange\">";
3054                                         } else {
3055                                                 print "<td class=\"link\">";
3056                                         }
3057                                         print $cgi->a({-href => href(action=>"blobdiff",
3058                                                                      hash=>$diff->{'to_id'},
3059                                                                      hash_parent=>$from_hash,
3060                                                                      hash_base=>$hash,
3061                                                                      hash_parent_base=>$hash_parent,
3062                                                                      file_name=>$diff->{'to_file'},
3063                                                                      file_parent=>$from_path)},
3064                                                       "diff" . ($i+1)) .
3065                                               " | </td>\n";
3066                                 }
3067                         }
3068
3069                         print "<td class=\"link\">";
3070                         if ($not_deleted) {
3071                                 print $cgi->a({-href => href(action=>"blob",
3072                                                              hash=>$diff->{'to_id'},
3073                                                              file_name=>$diff->{'to_file'},
3074                                                              hash_base=>$hash)},
3075                                               "blob");
3076                                 print " | " if ($has_history);
3077                         }
3078                         if ($has_history) {
3079                                 print $cgi->a({-href => href(action=>"history",
3080                                                              file_name=>$diff->{'to_file'},
3081                                                              hash_base=>$hash)},
3082                                               "history");
3083                         }
3084                         print "</td>\n";
3085
3086                         print "</tr>\n";
3087                         next; # instead of 'else' clause, to avoid extra indent
3088                 }
3089                 # else ordinary diff
3090
3091                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3092                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3093                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3094                         $to_mode_oct = oct $diff->{'to_mode'};
3095                         if (S_ISREG($to_mode_oct)) { # only for regular file
3096                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3097                         }
3098                         $to_file_type = file_type($diff->{'to_mode'});
3099                 }
3100                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3101                         $from_mode_oct = oct $diff->{'from_mode'};
3102                         if (S_ISREG($to_mode_oct)) { # only for regular file
3103                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3104                         }
3105                         $from_file_type = file_type($diff->{'from_mode'});
3106                 }
3107
3108                 if ($diff->{'status'} eq "A") { # created
3109                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3110                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3111                         $mode_chng   .= "]</span>";
3112                         print "<td>";
3113                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3114                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3115                                       -class => "list"}, esc_path($diff->{'file'}));
3116                         print "</td>\n";
3117                         print "<td>$mode_chng</td>\n";
3118                         print "<td class=\"link\">";
3119                         if ($action eq 'commitdiff') {
3120                                 # link to patch
3121                                 $patchno++;
3122                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3123                                 print " | ";
3124                         }
3125                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3126                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3127                                       "blob");
3128                         print "</td>\n";
3129
3130                 } elsif ($diff->{'status'} eq "D") { # deleted
3131                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3132                         print "<td>";
3133                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3134                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3135                                        -class => "list"}, esc_path($diff->{'file'}));
3136                         print "</td>\n";
3137                         print "<td>$mode_chng</td>\n";
3138                         print "<td class=\"link\">";
3139                         if ($action eq 'commitdiff') {
3140                                 # link to patch
3141                                 $patchno++;
3142                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3143                                 print " | ";
3144                         }
3145                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3146                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3147                                       "blob") . " | ";
3148                         if ($have_blame) {
3149                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3150                                                              file_name=>$diff->{'file'})},
3151                                               "blame") . " | ";
3152                         }
3153                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3154                                                      file_name=>$diff->{'file'})},
3155                                       "history");
3156                         print "</td>\n";
3157
3158                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3159                         my $mode_chnge = "";
3160                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3161                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3162                                 if ($from_file_type ne $to_file_type) {
3163                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3164                                 }
3165                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3166                                         if ($from_mode_str && $to_mode_str) {
3167                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3168                                         } elsif ($to_mode_str) {
3169                                                 $mode_chnge .= " mode: $to_mode_str";
3170                                         }
3171                                 }
3172                                 $mode_chnge .= "]</span>\n";
3173                         }
3174                         print "<td>";
3175                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3176                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3177                                       -class => "list"}, esc_path($diff->{'file'}));
3178                         print "</td>\n";
3179                         print "<td>$mode_chnge</td>\n";
3180                         print "<td class=\"link\">";
3181                         if ($action eq 'commitdiff') {
3182                                 # link to patch
3183                                 $patchno++;
3184                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3185                                       " | ";
3186                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3187                                 # "commit" view and modified file (not onlu mode changed)
3188                                 print $cgi->a({-href => href(action=>"blobdiff",
3189                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3190                                                              hash_base=>$hash, hash_parent_base=>$parent,
3191                                                              file_name=>$diff->{'file'})},
3192                                               "diff") .
3193                                       " | ";
3194                         }
3195                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3196                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3197                                        "blob") . " | ";
3198                         if ($have_blame) {
3199                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3200                                                              file_name=>$diff->{'file'})},
3201                                               "blame") . " | ";
3202                         }
3203                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3204                                                      file_name=>$diff->{'file'})},
3205                                       "history");
3206                         print "</td>\n";
3207
3208                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3209                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3210                         my $nstatus = $status_name{$diff->{'status'}};
3211                         my $mode_chng = "";
3212                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3213                                 # mode also for directories, so we cannot use $to_mode_str
3214                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3215                         }
3216                         print "<td>" .
3217                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3218                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3219                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3220                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3221                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3222                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3223                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3224                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3225                               "<td class=\"link\">";
3226                         if ($action eq 'commitdiff') {
3227                                 # link to patch
3228                                 $patchno++;
3229                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3230                                       " | ";
3231                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3232                                 # "commit" view and modified file (not only pure rename or copy)
3233                                 print $cgi->a({-href => href(action=>"blobdiff",
3234                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3235                                                              hash_base=>$hash, hash_parent_base=>$parent,
3236                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3237                                               "diff") .
3238                                       " | ";
3239                         }
3240                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3241                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3242                                       "blob") . " | ";
3243                         if ($have_blame) {
3244                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3245                                                              file_name=>$diff->{'to_file'})},
3246                                               "blame") . " | ";
3247                         }
3248                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3249                                                     file_name=>$diff->{'to_file'})},
3250                                       "history");
3251                         print "</td>\n";
3252
3253                 } # we should not encounter Unmerged (U) or Unknown (X) status
3254                 print "</tr>\n";
3255         }
3256         print "</tbody>" if $has_header;
3257         print "</table>\n";
3258 }
3259
3260 sub git_patchset_body {
3261         my ($fd, $difftree, $hash, @hash_parents) = @_;
3262         my ($hash_parent) = $hash_parents[0];
3263
3264         my $is_combined = (@hash_parents > 1);
3265         my $patch_idx = 0;
3266         my $patch_number = 0;
3267         my $patch_line;
3268         my $diffinfo;
3269         my $to_name;
3270         my (%from, %to);
3271
3272         print "<div class=\"patchset\">\n";
3273
3274         # skip to first patch
3275         while ($patch_line = <$fd>) {
3276                 chomp $patch_line;
3277
3278                 last if ($patch_line =~ m/^diff /);
3279         }
3280
3281  PATCH:
3282         while ($patch_line) {
3283
3284                 # parse "git diff" header line
3285                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3286                         # $1 is from_name, which we do not use
3287                         $to_name = unquote($2);
3288                         $to_name =~ s!^b/!!;
3289                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3290                         # $1 is 'cc' or 'combined', which we do not use
3291                         $to_name = unquote($2);
3292                 } else {
3293                         $to_name = undef;
3294                 }
3295
3296                 # check if current patch belong to current raw line
3297                 # and parse raw git-diff line if needed
3298                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3299                         # this is continuation of a split patch
3300                         print "<div class=\"patch cont\">\n";
3301                 } else {
3302                         # advance raw git-diff output if needed
3303                         $patch_idx++ if defined $diffinfo;
3304
3305                         # read and prepare patch information
3306                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3307
3308                         # compact combined diff output can have some patches skipped
3309                         # find which patch (using pathname of result) we are at now;
3310                         if ($is_combined) {
3311                                 while ($to_name ne $diffinfo->{'to_file'}) {
3312                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3313                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3314                                               "</div>\n";  # class="patch"
3315
3316                                         $patch_idx++;
3317                                         $patch_number++;
3318
3319                                         last if $patch_idx > $#$difftree;
3320                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3321                                 }
3322                         }
3323
3324                         # modifies %from, %to hashes
3325                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3326
3327                         # this is first patch for raw difftree line with $patch_idx index
3328                         # we index @$difftree array from 0, but number patches from 1
3329                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3330                 }
3331
3332                 # git diff header
3333                 #assert($patch_line =~ m/^diff /) if DEBUG;
3334                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3335                 $patch_number++;
3336                 # print "git diff" header
3337                 print format_git_diff_header_line($patch_line, $diffinfo,
3338                                                   \%from, \%to);
3339
3340                 # print extended diff header
3341                 print "<div class=\"diff extended_header\">\n";
3342         EXTENDED_HEADER:
3343                 while ($patch_line = <$fd>) {
3344                         chomp $patch_line;
3345
3346                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3347
3348                         print format_extended_diff_header_line($patch_line, $diffinfo,
3349                                                                \%from, \%to);
3350                 }
3351                 print "</div>\n"; # class="diff extended_header"
3352
3353                 # from-file/to-file diff header
3354                 if (! $patch_line) {
3355                         print "</div>\n"; # class="patch"
3356                         last PATCH;
3357                 }
3358                 next PATCH if ($patch_line =~ m/^diff /);
3359                 #assert($patch_line =~ m/^---/) if DEBUG;
3360
3361                 my $last_patch_line = $patch_line;
3362                 $patch_line = <$fd>;
3363                 chomp $patch_line;
3364                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3365
3366                 print format_diff_from_to_header($last_patch_line, $patch_line,
3367                                                  $diffinfo, \%from, \%to,
3368                                                  @hash_parents);
3369
3370                 # the patch itself
3371         LINE:
3372                 while ($patch_line = <$fd>) {
3373                         chomp $patch_line;
3374
3375                         next PATCH if ($patch_line =~ m/^diff /);
3376
3377                         print format_diff_line($patch_line, \%from, \%to);
3378                 }
3379
3380         } continue {
3381                 print "</div>\n"; # class="patch"
3382         }
3383
3384         # for compact combined (--cc) format, with chunk and patch simpliciaction
3385         # patchset might be empty, but there might be unprocessed raw lines
3386         for (++$patch_idx if $patch_number > 0;
3387              $patch_idx < @$difftree;
3388              ++$patch_idx) {
3389                 # read and prepare patch information
3390                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3391
3392                 # generate anchor for "patch" links in difftree / whatchanged part
3393                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3394                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3395                       "</div>\n";  # class="patch"
3396
3397                 $patch_number++;
3398         }
3399
3400         if ($patch_number == 0) {
3401                 if (@hash_parents > 1) {
3402                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3403                 } else {
3404                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3405                 }
3406         }
3407
3408         print "</div>\n"; # class="patchset"
3409 }
3410
3411 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3412
3413 sub git_project_list_body {
3414         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3415
3416         my ($check_forks) = gitweb_check_feature('forks');
3417
3418         my @projects;
3419         foreach my $pr (@$projlist) {
3420                 my (@aa) = git_get_last_activity($pr->{'path'});
3421                 unless (@aa) {
3422                         next;
3423                 }
3424                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3425                 if (!defined $pr->{'descr'}) {
3426                         my $descr = git_get_project_description($pr->{'path'}) || "";
3427                         $pr->{'descr_long'} = to_utf8($descr);
3428                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3429                 }
3430                 if (!defined $pr->{'owner'}) {
3431                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3432                 }
3433                 if ($check_forks) {
3434                         my $pname = $pr->{'path'};
3435                         if (($pname =~ s/\.git$//) &&
3436                             ($pname !~ /\/$/) &&
3437                             (-d "$projectroot/$pname")) {
3438                                 $pr->{'forks'} = "-d $projectroot/$pname";
3439                         }
3440                         else {
3441                                 $pr->{'forks'} = 0;
3442                         }
3443                 }
3444                 push @projects, $pr;
3445         }
3446
3447         $order ||= $default_projects_order;
3448         $from = 0 unless defined $from;
3449         $to = $#projects if (!defined $to || $#projects < $to);
3450
3451         print "<table class=\"project_list\">\n";
3452         unless ($no_header) {
3453                 print "<tr>\n";
3454                 if ($check_forks) {
3455                         print "<th></th>\n";
3456                 }
3457                 if ($order eq "project") {
3458                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3459                         print "<th>Project</th>\n";
3460                 } else {
3461                         print "<th>" .
3462                               $cgi->a({-href => href(project=>undef, order=>'project'),
3463                                        -class => "header"}, "Project") .
3464                               "</th>\n";
3465                 }
3466                 if ($order eq "descr") {
3467                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3468                         print "<th>Description</th>\n";
3469                 } else {
3470                         print "<th>" .
3471                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3472                                        -class => "header"}, "Description") .
3473                               "</th>\n";
3474                 }
3475                 if ($order eq "owner") {
3476                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3477                         print "<th>Owner</th>\n";
3478                 } else {
3479                         print "<th>" .
3480                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3481                                        -class => "header"}, "Owner") .
3482                               "</th>\n";
3483                 }
3484                 if ($order eq "age") {
3485                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3486                         print "<th>Last Change</th>\n";
3487                 } else {
3488                         print "<th>" .
3489                               $cgi->a({-href => href(project=>undef, order=>'age'),
3490                                        -class => "header"}, "Last Change") .
3491                               "</th>\n";
3492                 }
3493                 print "<th></th>\n" .
3494                       "</tr>\n";
3495         }
3496         my $alternate = 1;
3497         for (my $i = $from; $i <= $to; $i++) {
3498                 my $pr = $projects[$i];
3499                 if ($alternate) {
3500                         print "<tr class=\"dark\">\n";
3501                 } else {
3502                         print "<tr class=\"light\">\n";
3503                 }
3504                 $alternate ^= 1;
3505                 if ($check_forks) {
3506                         print "<td>";
3507                         if ($pr->{'forks'}) {
3508                                 print "<!-- $pr->{'forks'} -->\n";
3509                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3510                         }
3511                         print "</td>\n";
3512                 }
3513                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3514                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3515                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3516                                         -class => "list", -title => $pr->{'descr_long'}},
3517                                         esc_html($pr->{'descr'})) . "</td>\n" .
3518                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3519                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3520                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3521                       "<td class=\"link\">" .
3522                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3523                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3524                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3525                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3526                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3527                       "</td>\n" .
3528                       "</tr>\n";
3529         }
3530         if (defined $extra) {
3531                 print "<tr>\n";
3532                 if ($check_forks) {
3533                         print "<td></td>\n";
3534                 }
3535                 print "<td colspan=\"5\">$extra</td>\n" .
3536                       "</tr>\n";
3537         }
3538         print "</table>\n";
3539 }
3540
3541 sub git_shortlog_body {
3542         # uses global variable $project
3543         my ($commitlist, $from, $to, $refs, $extra) = @_;
3544
3545         $from = 0 unless defined $from;
3546         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3547
3548         print "<table class=\"shortlog\">\n";
3549         my $alternate = 1;
3550         for (my $i = $from; $i <= $to; $i++) {
3551                 my %co = %{$commitlist->[$i]};
3552                 my $commit = $co{'id'};
3553                 my $ref = format_ref_marker($refs, $commit);
3554                 if ($alternate) {
3555                         print "<tr class=\"dark\">\n";
3556                 } else {
3557                         print "<tr class=\"light\">\n";
3558                 }
3559                 $alternate ^= 1;
3560                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3561                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3562                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3563                       "<td><i>" . $author . "</i></td>\n" .
3564                       "<td>";
3565                 print format_subject_html($co{'title'}, $co{'title_short'},
3566                                           href(action=>"commit", hash=>$commit), $ref);
3567                 print "</td>\n" .
3568                       "<td class=\"link\">" .
3569                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3570                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3571                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3572                 my $snapshot_links = format_snapshot_links($commit);
3573                 if (defined $snapshot_links) {
3574                         print " | " . $snapshot_links;
3575                 }
3576                 print "</td>\n" .
3577                       "</tr>\n";
3578         }
3579         if (defined $extra) {
3580                 print "<tr>\n" .
3581                       "<td colspan=\"4\">$extra</td>\n" .
3582                       "</tr>\n";
3583         }
3584         print "</table>\n";
3585 }
3586
3587 sub git_history_body {
3588         # Warning: assumes constant type (blob or tree) during history
3589         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3590
3591         $from = 0 unless defined $from;
3592         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3593
3594         print "<table class=\"history\">\n";
3595         my $alternate = 1;
3596         for (my $i = $from; $i <= $to; $i++) {
3597                 my %co = %{$commitlist->[$i]};
3598                 if (!%co) {
3599                         next;
3600                 }
3601                 my $commit = $co{'id'};
3602
3603                 my $ref = format_ref_marker($refs, $commit);
3604
3605                 if ($alternate) {
3606                         print "<tr class=\"dark\">\n";
3607                 } else {
3608                         print "<tr class=\"light\">\n";
3609                 }
3610                 $alternate ^= 1;
3611         # shortlog uses      chop_str($co{'author_name'}, 10)
3612                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3613                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3614                       "<td><i>" . $author . "</i></td>\n" .
3615                       "<td>";
3616                 # originally git_history used chop_str($co{'title'}, 50)
3617                 print format_subject_html($co{'title'}, $co{'title_short'},
3618                                           href(action=>"commit", hash=>$commit), $ref);
3619                 print "</td>\n" .
3620                       "<td class=\"link\">" .
3621                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3622                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3623
3624                 if ($ftype eq 'blob') {
3625                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3626                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3627                         if (defined $blob_current && defined $blob_parent &&
3628                                         $blob_current ne $blob_parent) {
3629                                 print " | " .
3630                                         $cgi->a({-href => href(action=>"blobdiff",
3631                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3632                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3633                                                                file_name=>$file_name)},
3634                                                 "diff to current");
3635                         }
3636                 }
3637                 print "</td>\n" .
3638                       "</tr>\n";
3639         }
3640         if (defined $extra) {
3641                 print "<tr>\n" .
3642                       "<td colspan=\"4\">$extra</td>\n" .
3643                       "</tr>\n";
3644         }
3645         print "</table>\n";
3646 }
3647
3648 sub git_tags_body {
3649         # uses global variable $project
3650         my ($taglist, $from, $to, $extra) = @_;
3651         $from = 0 unless defined $from;
3652         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3653
3654         print "<table class=\"tags\">\n";
3655         my $alternate = 1;
3656         for (my $i = $from; $i <= $to; $i++) {
3657                 my $entry = $taglist->[$i];
3658                 my %tag = %$entry;
3659                 my $comment = $tag{'subject'};
3660                 my $comment_short;
3661                 if (defined $comment) {
3662                         $comment_short = chop_str($comment, 30, 5);
3663                 }
3664                 if ($alternate) {
3665                         print "<tr class=\"dark\">\n";
3666                 } else {
3667                         print "<tr class=\"light\">\n";
3668                 }
3669                 $alternate ^= 1;
3670                 if (defined $tag{'age'}) {
3671                         print "<td><i>$tag{'age'}</i></td>\n";
3672                 } else {
3673                         print "<td></td>\n";
3674                 }
3675                 print "<td>" .
3676                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3677                                -class => "list name"}, esc_html($tag{'name'})) .
3678                       "</td>\n" .
3679                       "<td>";
3680                 if (defined $comment) {
3681                         print format_subject_html($comment, $comment_short,
3682                                                   href(action=>"tag", hash=>$tag{'id'}));
3683                 }
3684                 print "</td>\n" .
3685                       "<td class=\"selflink\">";
3686                 if ($tag{'type'} eq "tag") {
3687                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3688                 } else {
3689                         print "&nbsp;";
3690                 }
3691                 print "</td>\n" .
3692                       "<td class=\"link\">" . " | " .
3693                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3694                 if ($tag{'reftype'} eq "commit") {
3695                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3696                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3697                 } elsif ($tag{'reftype'} eq "blob") {
3698                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3699                 }
3700                 print "</td>\n" .
3701                       "</tr>";
3702         }
3703         if (defined $extra) {
3704                 print "<tr>\n" .
3705                       "<td colspan=\"5\">$extra</td>\n" .
3706                       "</tr>\n";
3707         }
3708         print "</table>\n";
3709 }
3710
3711 sub git_heads_body {
3712         # uses global variable $project
3713         my ($headlist, $head, $from, $to, $extra) = @_;
3714         $from = 0 unless defined $from;
3715         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3716
3717         print "<table class=\"heads\">\n";
3718         my $alternate = 1;
3719         for (my $i = $from; $i <= $to; $i++) {
3720                 my $entry = $headlist->[$i];
3721                 my %ref = %$entry;
3722                 my $curr = $ref{'id'} eq $head;
3723                 if ($alternate) {
3724                         print "<tr class=\"dark\">\n";
3725                 } else {
3726                         print "<tr class=\"light\">\n";
3727                 }
3728                 $alternate ^= 1;
3729                 print "<td><i>$ref{'age'}</i></td>\n" .
3730                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3731                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3732                                -class => "list name"},esc_html($ref{'name'})) .
3733                       "</td>\n" .
3734                       "<td class=\"link\">" .
3735                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3736                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3737                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3738                       "</td>\n" .
3739                       "</tr>";
3740         }
3741         if (defined $extra) {
3742                 print "<tr>\n" .
3743                       "<td colspan=\"3\">$extra</td>\n" .
3744                       "</tr>\n";
3745         }
3746         print "</table>\n";
3747 }
3748
3749 sub git_search_grep_body {
3750         my ($commitlist, $from, $to, $extra) = @_;
3751         $from = 0 unless defined $from;
3752         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3753
3754         print "<table class=\"commit_search\">\n";
3755         my $alternate = 1;
3756         for (my $i = $from; $i <= $to; $i++) {
3757                 my %co = %{$commitlist->[$i]};
3758                 if (!%co) {
3759                         next;
3760                 }
3761                 my $commit = $co{'id'};
3762                 if ($alternate) {
3763                         print "<tr class=\"dark\">\n";
3764                 } else {
3765                         print "<tr class=\"light\">\n";
3766                 }
3767                 $alternate ^= 1;
3768                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3769                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3770                       "<td><i>" . $author . "</i></td>\n" .
3771                       "<td>" .
3772                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3773                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3774                 my $comment = $co{'comment'};
3775                 foreach my $line (@$comment) {
3776                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3777                                 my $lead = esc_html($1) || "";
3778                                 $lead = chop_str($lead, 30, 10);
3779                                 my $match = esc_html($2) || "";
3780                                 my $trail = esc_html($3) || "";
3781                                 $trail = chop_str($trail, 30, 10);
3782                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3783                                 print chop_str($text, 80, 5) . "<br/>\n";
3784                         }
3785                 }
3786                 print "</td>\n" .
3787                       "<td class=\"link\">" .
3788                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3789                       " | " .
3790                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3791                       " | " .
3792                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3793                 print "</td>\n" .
3794                       "</tr>\n";
3795         }
3796         if (defined $extra) {
3797                 print "<tr>\n" .
3798                       "<td colspan=\"3\">$extra</td>\n" .
3799                       "</tr>\n";
3800         }
3801         print "</table>\n";
3802 }
3803
3804 ## ======================================================================
3805 ## ======================================================================
3806 ## actions
3807
3808 sub git_project_list {
3809         my $order = $cgi->param('o');
3810         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3811                 die_error(undef, "Unknown order parameter");
3812         }
3813
3814         my @list = git_get_projects_list();
3815         if (!@list) {
3816                 die_error(undef, "No projects found");
3817         }
3818
3819         git_header_html();
3820         if (-f $home_text) {
3821                 print "<div class=\"index_include\">\n";
3822                 open (my $fd, $home_text);
3823                 print <$fd>;
3824                 close $fd;
3825                 print "</div>\n";
3826         }
3827         git_project_list_body(\@list, $order);
3828         git_footer_html();
3829 }
3830
3831 sub git_forks {
3832         my $order = $cgi->param('o');
3833         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3834                 die_error(undef, "Unknown order parameter");
3835         }
3836
3837         my @list = git_get_projects_list($project);
3838         if (!@list) {
3839                 die_error(undef, "No forks found");
3840         }
3841
3842         git_header_html();
3843         git_print_page_nav('','');
3844         git_print_header_div('summary', "$project forks");
3845         git_project_list_body(\@list, $order);
3846         git_footer_html();
3847 }
3848
3849 sub git_project_index {
3850         my @projects = git_get_projects_list($project);
3851
3852         print $cgi->header(
3853                 -type => 'text/plain',
3854                 -charset => 'utf-8',
3855                 -content_disposition => 'inline; filename="index.aux"');
3856
3857         foreach my $pr (@projects) {
3858                 if (!exists $pr->{'owner'}) {
3859                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3860                 }
3861
3862                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3863                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3864                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3865                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3866                 $path  =~ s/ /\+/g;
3867                 $owner =~ s/ /\+/g;
3868
3869                 print "$path $owner\n";
3870         }
3871 }
3872
3873 sub git_summary {
3874         my $descr = git_get_project_description($project) || "none";
3875         my %co = parse_commit("HEAD");
3876         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3877         my $head = $co{'id'};
3878
3879         my $owner = git_get_project_owner($project);
3880
3881         my $refs = git_get_references();
3882         # These get_*_list functions return one more to allow us to see if
3883         # there are more ...
3884         my @taglist  = git_get_tags_list(16);
3885         my @headlist = git_get_heads_list(16);
3886         my @forklist;
3887         my ($check_forks) = gitweb_check_feature('forks');
3888
3889         if ($check_forks) {
3890                 @forklist = git_get_projects_list($project);
3891         }
3892
3893         git_header_html();
3894         git_print_page_nav('summary','', $head);
3895
3896         print "<div class=\"title\">&nbsp;</div>\n";
3897         print "<table class=\"projects_list\">\n" .
3898               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3899               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3900         if (defined $cd{'rfc2822'}) {
3901                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3902         }
3903
3904         # use per project git URL list in $projectroot/$project/cloneurl
3905         # or make project git URL from git base URL and project name
3906         my $url_tag = "URL";
3907         my @url_list = git_get_project_url_list($project);
3908         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3909         foreach my $git_url (@url_list) {
3910                 next unless $git_url;
3911                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3912                 $url_tag = "";
3913         }
3914         print "</table>\n";
3915
3916         if (-s "$projectroot/$project/README.html") {
3917                 if (open my $fd, "$projectroot/$project/README.html") {
3918                         print "<div class=\"title\">readme</div>\n" .
3919                               "<div class=\"readme\">\n";
3920                         print $_ while (<$fd>);
3921                         print "\n</div>\n"; # class="readme"
3922                         close $fd;
3923                 }
3924         }
3925
3926         # we need to request one more than 16 (0..15) to check if
3927         # those 16 are all
3928         my @commitlist = $head ? parse_commits($head, 17) : ();
3929         if (@commitlist) {
3930                 git_print_header_div('shortlog');
3931                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3932                                   $#commitlist <=  15 ? undef :
3933                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3934         }
3935
3936         if (@taglist) {
3937                 git_print_header_div('tags');
3938                 git_tags_body(\@taglist, 0, 15,
3939                               $#taglist <=  15 ? undef :
3940                               $cgi->a({-href => href(action=>"tags")}, "..."));
3941         }
3942
3943         if (@headlist) {
3944                 git_print_header_div('heads');
3945                 git_heads_body(\@headlist, $head, 0, 15,
3946                                $#headlist <= 15 ? undef :
3947                                $cgi->a({-href => href(action=>"heads")}, "..."));
3948         }
3949
3950         if (@forklist) {
3951                 git_print_header_div('forks');
3952                 git_project_list_body(\@forklist, undef, 0, 15,
3953                                       $#forklist <= 15 ? undef :
3954                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3955                                       'noheader');
3956         }
3957
3958         git_footer_html();
3959 }
3960
3961 sub git_tag {
3962         my $head = git_get_head_hash($project);
3963         git_header_html();
3964         git_print_page_nav('','', $head,undef,$head);
3965         my %tag = parse_tag($hash);
3966
3967         if (! %tag) {
3968                 die_error(undef, "Unknown tag object");
3969         }
3970
3971         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3972         print "<div class=\"title_text\">\n" .
3973               "<table class=\"object_header\">\n" .
3974               "<tr>\n" .
3975               "<td>object</td>\n" .
3976               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3977                                $tag{'object'}) . "</td>\n" .
3978               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3979                                               $tag{'type'}) . "</td>\n" .
3980               "</tr>\n";
3981         if (defined($tag{'author'})) {
3982                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3983                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3984                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3985                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3986                         "</td></tr>\n";
3987         }
3988         print "</table>\n\n" .
3989               "</div>\n";
3990         print "<div class=\"page_body\">";
3991         my $comment = $tag{'comment'};
3992         foreach my $line (@$comment) {
3993                 chomp $line;
3994                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3995         }
3996         print "</div>\n";
3997         git_footer_html();
3998 }
3999
4000 sub git_blame2 {
4001         my $fd;
4002         my $ftype;
4003
4004         my ($have_blame) = gitweb_check_feature('blame');
4005         if (!$have_blame) {
4006                 die_error('403 Permission denied', "Permission denied");
4007         }
4008         die_error('404 Not Found', "File name not defined") if (!$file_name);
4009         $hash_base ||= git_get_head_hash($project);
4010         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4011         my %co = parse_commit($hash_base)
4012                 or die_error(undef, "Reading commit failed");
4013         if (!defined $hash) {
4014                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4015                         or die_error(undef, "Error looking up file");
4016         }
4017         $ftype = git_get_type($hash);
4018         if ($ftype !~ "blob") {
4019                 die_error('400 Bad Request', "Object is not a blob");
4020         }
4021         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4022               $file_name, $hash_base)
4023                 or die_error(undef, "Open git-blame failed");
4024         git_header_html();
4025         my $formats_nav =
4026                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4027                         "blob") .
4028                 " | " .
4029                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4030                         "history") .
4031                 " | " .
4032                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4033                         "HEAD");
4034         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4035         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4036         git_print_page_path($file_name, $ftype, $hash_base);
4037         my @rev_color = (qw(light2 dark2));
4038         my $num_colors = scalar(@rev_color);
4039         my $current_color = 0;
4040         my $last_rev;
4041         print <<HTML;
4042 <div class="page_body">
4043 <table class="blame">
4044 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4045 HTML
4046         my %metainfo = ();
4047         while (1) {
4048                 $_ = <$fd>;
4049                 last unless defined $_;
4050                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4051                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4052                 if (!exists $metainfo{$full_rev}) {
4053                         $metainfo{$full_rev} = {};
4054                 }
4055                 my $meta = $metainfo{$full_rev};
4056                 while (<$fd>) {
4057                         last if (s/^\t//);
4058                         if (/^(\S+) (.*)$/) {
4059                                 $meta->{$1} = $2;
4060                         }
4061                 }
4062                 my $data = $_;
4063                 chomp $data;
4064                 my $rev = substr($full_rev, 0, 8);
4065                 my $author = $meta->{'author'};
4066                 my %date = parse_date($meta->{'author-time'},
4067                                       $meta->{'author-tz'});
4068                 my $date = $date{'iso-tz'};
4069                 if ($group_size) {
4070                         $current_color = ++$current_color % $num_colors;
4071                 }
4072                 print "<tr class=\"$rev_color[$current_color]\">\n";
4073                 if ($group_size) {
4074                         print "<td class=\"sha1\"";
4075                         print " title=\"". esc_html($author) . ", $date\"";
4076                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4077                         print ">";
4078                         print $cgi->a({-href => href(action=>"commit",
4079                                                      hash=>$full_rev,
4080                                                      file_name=>$file_name)},
4081                                       esc_html($rev));
4082                         print "</td>\n";
4083                 }
4084                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4085                         or die_error(undef, "Open git-rev-parse failed");
4086                 my $parent_commit = <$dd>;
4087                 close $dd;
4088                 chomp($parent_commit);
4089                 my $blamed = href(action => 'blame',
4090                                   file_name => $meta->{'filename'},
4091                                   hash_base => $parent_commit);
4092                 print "<td class=\"linenr\">";
4093                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4094                                 -id => "l$lineno",
4095                                 -class => "linenr" },
4096                               esc_html($lineno));
4097                 print "</td>";
4098                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4099                 print "</tr>\n";
4100         }
4101         print "</table>\n";
4102         print "</div>";
4103         close $fd
4104                 or print "Reading blob failed\n";
4105         git_footer_html();
4106 }
4107
4108 sub git_blame {
4109         my $fd;
4110
4111         my ($have_blame) = gitweb_check_feature('blame');
4112         if (!$have_blame) {
4113                 die_error('403 Permission denied', "Permission denied");
4114         }
4115         die_error('404 Not Found', "File name not defined") if (!$file_name);
4116         $hash_base ||= git_get_head_hash($project);
4117         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4118         my %co = parse_commit($hash_base)
4119                 or die_error(undef, "Reading commit failed");
4120         if (!defined $hash) {
4121                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4122                         or die_error(undef, "Error lookup file");
4123         }
4124         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4125                 or die_error(undef, "Open git-annotate failed");
4126         git_header_html();
4127         my $formats_nav =
4128                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4129                         "blob") .
4130                 " | " .
4131                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4132                         "history") .
4133                 " | " .
4134                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4135                         "HEAD");
4136         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4137         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4138         git_print_page_path($file_name, 'blob', $hash_base);
4139         print "<div class=\"page_body\">\n";
4140         print <<HTML;
4141 <table class="blame">
4142   <tr>
4143     <th>Commit</th>
4144     <th>Age</th>
4145     <th>Author</th>
4146     <th>Line</th>
4147     <th>Data</th>
4148   </tr>
4149 HTML
4150         my @line_class = (qw(light dark));
4151         my $line_class_len = scalar (@line_class);
4152         my $line_class_num = $#line_class;
4153         while (my $line = <$fd>) {
4154                 my $long_rev;
4155                 my $short_rev;
4156                 my $author;
4157                 my $time;
4158                 my $lineno;
4159                 my $data;
4160                 my $age;
4161                 my $age_str;
4162                 my $age_class;
4163
4164                 chomp $line;
4165                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4166
4167                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4168                         $long_rev = $1;
4169                         $author   = $2;
4170                         $time     = $3;
4171                         $lineno   = $4;
4172                         $data     = $5;
4173                 } else {
4174                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4175                         next;
4176                 }
4177                 $short_rev  = substr ($long_rev, 0, 8);
4178                 $age        = time () - $time;
4179                 $age_str    = age_string ($age);
4180                 $age_str    =~ s/ /&nbsp;/g;
4181                 $age_class  = age_class($age);
4182                 $author     = esc_html ($author);
4183                 $author     =~ s/ /&nbsp;/g;
4184
4185                 $data = untabify($data);
4186                 $data = esc_html ($data);
4187
4188                 print <<HTML;
4189   <tr class="$line_class[$line_class_num]">
4190     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4191     <td class="$age_class">$age_str</td>
4192     <td>$author</td>
4193     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4194     <td class="pre">$data</td>
4195   </tr>
4196 HTML
4197         } # while (my $line = <$fd>)
4198         print "</table>\n\n";
4199         close $fd
4200                 or print "Reading blob failed.\n";
4201         print "</div>";
4202         git_footer_html();
4203 }
4204
4205 sub git_tags {
4206         my $head = git_get_head_hash($project);
4207         git_header_html();
4208         git_print_page_nav('','', $head,undef,$head);
4209         git_print_header_div('summary', $project);
4210
4211         my @tagslist = git_get_tags_list();
4212         if (@tagslist) {
4213                 git_tags_body(\@tagslist);
4214         }
4215         git_footer_html();
4216 }
4217
4218 sub git_heads {
4219         my $head = git_get_head_hash($project);
4220         git_header_html();
4221         git_print_page_nav('','', $head,undef,$head);
4222         git_print_header_div('summary', $project);
4223
4224         my @headslist = git_get_heads_list();
4225         if (@headslist) {
4226                 git_heads_body(\@headslist, $head);
4227         }
4228         git_footer_html();
4229 }
4230
4231 sub git_blob_plain {
4232         my $expires;
4233
4234         if (!defined $hash) {
4235                 if (defined $file_name) {
4236                         my $base = $hash_base || git_get_head_hash($project);
4237                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4238                                 or die_error(undef, "Error lookup file");
4239                 } else {
4240                         die_error(undef, "No file name defined");
4241                 }
4242         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4243                 # blobs defined by non-textual hash id's can be cached
4244                 $expires = "+1d";
4245         }
4246
4247         my $type = shift;
4248         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4249                 or die_error(undef, "Couldn't cat $file_name, $hash");
4250
4251         $type ||= blob_mimetype($fd, $file_name);
4252
4253         # save as filename, even when no $file_name is given
4254         my $save_as = "$hash";
4255         if (defined $file_name) {
4256                 $save_as = $file_name;
4257         } elsif ($type =~ m/^text\//) {
4258                 $save_as .= '.txt';
4259         }
4260
4261         print $cgi->header(
4262                 -type => "$type",
4263                 -expires=>$expires,
4264                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4265         undef $/;
4266         binmode STDOUT, ':raw';
4267         print <$fd>;
4268         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4269         $/ = "\n";
4270         close $fd;
4271 }
4272
4273 sub git_blob {
4274         my $expires;
4275
4276         if (!defined $hash) {
4277                 if (defined $file_name) {
4278                         my $base = $hash_base || git_get_head_hash($project);
4279                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4280                                 or die_error(undef, "Error lookup file");
4281                 } else {
4282                         die_error(undef, "No file name defined");
4283                 }
4284         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4285                 # blobs defined by non-textual hash id's can be cached
4286                 $expires = "+1d";
4287         }
4288
4289         my ($have_blame) = gitweb_check_feature('blame');
4290         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4291                 or die_error(undef, "Couldn't cat $file_name, $hash");
4292         my $mimetype = blob_mimetype($fd, $file_name);
4293         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4294                 close $fd;
4295                 return git_blob_plain($mimetype);
4296         }
4297         # we can have blame only for text/* mimetype
4298         $have_blame &&= ($mimetype =~ m!^text/!);
4299
4300         git_header_html(undef, $expires);
4301         my $formats_nav = '';
4302         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4303                 if (defined $file_name) {
4304                         if ($have_blame) {
4305                                 $formats_nav .=
4306                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4307                                                 "blame") .
4308                                         " | ";
4309                         }
4310                         $formats_nav .=
4311                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4312                                         "history") .
4313                                 " | " .
4314                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4315                                         "raw") .
4316                                 " | " .
4317                                 $cgi->a({-href => href(action=>"blob",
4318                                                        hash_base=>"HEAD", file_name=>$file_name)},
4319                                         "HEAD");
4320                 } else {
4321                         $formats_nav .=
4322                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4323                                         "raw");
4324                 }
4325                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4326                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4327         } else {
4328                 print "<div class=\"page_nav\">\n" .
4329                       "<br/><br/></div>\n" .
4330                       "<div class=\"title\">$hash</div>\n";
4331         }
4332         git_print_page_path($file_name, "blob", $hash_base);
4333         print "<div class=\"page_body\">\n";
4334         if ($mimetype =~ m!^image/!) {
4335                 print qq!<img type="$mimetype"!;
4336                 if ($file_name) {
4337                         print qq! alt="$file_name" title="$file_name"!;
4338                 }
4339                 print qq! src="! .
4340                       href(action=>"blob_plain", hash=>$hash,
4341                            hash_base=>$hash_base, file_name=>$file_name) .
4342                       qq!" />\n!;
4343         } else {
4344                 my $nr;
4345                 while (my $line = <$fd>) {
4346                         chomp $line;
4347                         $nr++;
4348                         $line = untabify($line);
4349                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4350                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4351                 }
4352         }
4353         close $fd
4354                 or print "Reading blob failed.\n";
4355         print "</div>";
4356         git_footer_html();
4357 }
4358
4359 sub git_tree {
4360         if (!defined $hash_base) {
4361                 $hash_base = "HEAD";
4362         }
4363         if (!defined $hash) {
4364                 if (defined $file_name) {
4365                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4366                 } else {
4367                         $hash = $hash_base;
4368                 }
4369         }
4370         $/ = "\0";
4371         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4372                 or die_error(undef, "Open git-ls-tree failed");
4373         my @entries = map { chomp; $_ } <$fd>;
4374         close $fd or die_error(undef, "Reading tree failed");
4375         $/ = "\n";
4376
4377         my $refs = git_get_references();
4378         my $ref = format_ref_marker($refs, $hash_base);
4379         git_header_html();
4380         my $basedir = '';
4381         my ($have_blame) = gitweb_check_feature('blame');
4382         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4383                 my @views_nav = ();
4384                 if (defined $file_name) {
4385                         push @views_nav,
4386                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4387                                         "history"),
4388                                 $cgi->a({-href => href(action=>"tree",
4389                                                        hash_base=>"HEAD", file_name=>$file_name)},
4390                                         "HEAD"),
4391                 }
4392                 my $snapshot_links = format_snapshot_links($hash);
4393                 if (defined $snapshot_links) {
4394                         # FIXME: Should be available when we have no hash base as well.
4395                         push @views_nav, $snapshot_links;
4396                 }
4397                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4398                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4399         } else {
4400                 undef $hash_base;
4401                 print "<div class=\"page_nav\">\n";
4402                 print "<br/><br/></div>\n";
4403                 print "<div class=\"title\">$hash</div>\n";
4404         }
4405         if (defined $file_name) {
4406                 $basedir = $file_name;
4407                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4408                         $basedir .= '/';
4409                 }
4410         }
4411         git_print_page_path($file_name, 'tree', $hash_base);
4412         print "<div class=\"page_body\">\n";
4413         print "<table class=\"tree\">\n";
4414         my $alternate = 1;
4415         # '..' (top directory) link if possible
4416         if (defined $hash_base &&
4417             defined $file_name && $file_name =~ m![^/]+$!) {
4418                 if ($alternate) {
4419                         print "<tr class=\"dark\">\n";
4420                 } else {
4421                         print "<tr class=\"light\">\n";
4422                 }
4423                 $alternate ^= 1;
4424
4425                 my $up = $file_name;
4426                 $up =~ s!/?[^/]+$!!;
4427                 undef $up unless $up;
4428                 # based on git_print_tree_entry
4429                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4430                 print '<td class="list">';
4431                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4432                                              file_name=>$up)},
4433                               "..");
4434                 print "</td>\n";
4435                 print "<td class=\"link\"></td>\n";
4436
4437                 print "</tr>\n";
4438         }
4439         foreach my $line (@entries) {
4440                 my %t = parse_ls_tree_line($line, -z => 1);
4441
4442                 if ($alternate) {
4443                         print "<tr class=\"dark\">\n";
4444                 } else {
4445                         print "<tr class=\"light\">\n";
4446                 }
4447                 $alternate ^= 1;
4448
4449                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4450
4451                 print "</tr>\n";
4452         }
4453         print "</table>\n" .
4454               "</div>";
4455         git_footer_html();
4456 }
4457
4458 sub git_snapshot {
4459         my @supported_fmts = gitweb_check_feature('snapshot');
4460         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4461
4462         my $format = $cgi->param('sf');
4463         if (!@supported_fmts) {
4464                 die_error('403 Permission denied', "Permission denied");
4465         }
4466         # default to first supported snapshot format
4467         $format ||= $supported_fmts[0];
4468         if ($format !~ m/^[a-z0-9]+$/) {
4469                 die_error(undef, "Invalid snapshot format parameter");
4470         } elsif (!exists($known_snapshot_formats{$format})) {
4471                 die_error(undef, "Unknown snapshot format");
4472         } elsif (!grep($_ eq $format, @supported_fmts)) {
4473                 die_error(undef, "Unsupported snapshot format");
4474         }
4475
4476         if (!defined $hash) {
4477                 $hash = git_get_head_hash($project);
4478         }
4479
4480         my $git_command = git_cmd_str();
4481         my $name = $project;
4482         $name =~ s,([^/])/*\.git$,$1,;
4483         $name = basename($name);
4484         my $filename = to_utf8($name);
4485         $name =~ s/\047/\047\\\047\047/g;
4486         my $cmd;
4487         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4488         $cmd = "$git_command archive " .
4489                 "--format=$known_snapshot_formats{$format}{'format'} " .
4490                 "--prefix=\'$name\'/ $hash";
4491         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4492                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4493         }
4494
4495         print $cgi->header(
4496                 -type => $known_snapshot_formats{$format}{'type'},
4497                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4498                 -status => '200 OK');
4499
4500         open my $fd, "-|", $cmd
4501                 or die_error(undef, "Execute git-archive failed");
4502         binmode STDOUT, ':raw';
4503         print <$fd>;
4504         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4505         close $fd;
4506 }
4507
4508 sub git_log {
4509         my $head = git_get_head_hash($project);
4510         if (!defined $hash) {
4511                 $hash = $head;
4512         }
4513         if (!defined $page) {
4514                 $page = 0;
4515         }
4516         my $refs = git_get_references();
4517
4518         my @commitlist = parse_commits($hash, 101, (100 * $page));
4519
4520         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4521
4522         git_header_html();
4523         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4524
4525         if (!@commitlist) {
4526                 my %co = parse_commit($hash);
4527
4528                 git_print_header_div('summary', $project);
4529                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4530         }
4531         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4532         for (my $i = 0; $i <= $to; $i++) {
4533                 my %co = %{$commitlist[$i]};
4534                 next if !%co;
4535                 my $commit = $co{'id'};
4536                 my $ref = format_ref_marker($refs, $commit);
4537                 my %ad = parse_date($co{'author_epoch'});
4538                 git_print_header_div('commit',
4539                                "<span class=\"age\">$co{'age_string'}</span>" .
4540                                esc_html($co{'title'}) . $ref,
4541                                $commit);
4542                 print "<div class=\"title_text\">\n" .
4543                       "<div class=\"log_link\">\n" .
4544                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4545                       " | " .
4546                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4547                       " | " .
4548                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4549                       "<br/>\n" .
4550                       "</div>\n" .
4551                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4552                       "</div>\n";
4553
4554                 print "<div class=\"log_body\">\n";
4555                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4556                 print "</div>\n";
4557         }
4558         if ($#commitlist >= 100) {
4559                 print "<div class=\"page_nav\">\n";
4560                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4561                                -accesskey => "n", -title => "Alt-n"}, "next");
4562                 print "</div>\n";
4563         }
4564         git_footer_html();
4565 }
4566
4567 sub git_commit {
4568         $hash ||= $hash_base || "HEAD";
4569         my %co = parse_commit($hash);
4570         if (!%co) {
4571                 die_error(undef, "Unknown commit object");
4572         }
4573         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4574         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4575
4576         my $parent  = $co{'parent'};
4577         my $parents = $co{'parents'}; # listref
4578
4579         # we need to prepare $formats_nav before any parameter munging
4580         my $formats_nav;
4581         if (!defined $parent) {
4582                 # --root commitdiff
4583                 $formats_nav .= '(initial)';
4584         } elsif (@$parents == 1) {
4585                 # single parent commit
4586                 $formats_nav .=
4587                         '(parent: ' .
4588                         $cgi->a({-href => href(action=>"commit",
4589                                                hash=>$parent)},
4590                                 esc_html(substr($parent, 0, 7))) .
4591                         ')';
4592         } else {
4593                 # merge commit
4594                 $formats_nav .=
4595                         '(merge: ' .
4596                         join(' ', map {
4597                                 $cgi->a({-href => href(action=>"commit",
4598                                                        hash=>$_)},
4599                                         esc_html(substr($_, 0, 7)));
4600                         } @$parents ) .
4601                         ')';
4602         }
4603
4604         if (!defined $parent) {
4605                 $parent = "--root";
4606         }
4607         my @difftree;
4608         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4609                 @diff_opts,
4610                 (@$parents <= 1 ? $parent : '-c'),
4611                 $hash, "--"
4612                 or die_error(undef, "Open git-diff-tree failed");
4613         @difftree = map { chomp; $_ } <$fd>;
4614         close $fd or die_error(undef, "Reading git-diff-tree failed");
4615
4616         # non-textual hash id's can be cached
4617         my $expires;
4618         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4619                 $expires = "+1d";
4620         }
4621         my $refs = git_get_references();
4622         my $ref = format_ref_marker($refs, $co{'id'});
4623
4624         git_header_html(undef, $expires);
4625         git_print_page_nav('commit', '',
4626                            $hash, $co{'tree'}, $hash,
4627                            $formats_nav);
4628
4629         if (defined $co{'parent'}) {
4630                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4631         } else {
4632                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4633         }
4634         print "<div class=\"title_text\">\n" .
4635               "<table class=\"object_header\">\n";
4636         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4637               "<tr>" .
4638               "<td></td><td> $ad{'rfc2822'}";
4639         if ($ad{'hour_local'} < 6) {
4640                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4641                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4642         } else {
4643                 printf(" (%02d:%02d %s)",
4644                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4645         }
4646         print "</td>" .
4647               "</tr>\n";
4648         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4649         print "<tr><td></td><td> $cd{'rfc2822'}" .
4650               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4651               "</td></tr>\n";
4652         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4653         print "<tr>" .
4654               "<td>tree</td>" .
4655               "<td class=\"sha1\">" .
4656               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4657                        class => "list"}, $co{'tree'}) .
4658               "</td>" .
4659               "<td class=\"link\">" .
4660               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4661                       "tree");
4662         my $snapshot_links = format_snapshot_links($hash);
4663         if (defined $snapshot_links) {
4664                 print " | " . $snapshot_links;
4665         }
4666         print "</td>" .
4667               "</tr>\n";
4668
4669         foreach my $par (@$parents) {
4670                 print "<tr>" .
4671                       "<td>parent</td>" .
4672                       "<td class=\"sha1\">" .
4673                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4674                                class => "list"}, $par) .
4675                       "</td>" .
4676                       "<td class=\"link\">" .
4677                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4678                       " | " .
4679                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4680                       "</td>" .
4681                       "</tr>\n";
4682         }
4683         print "</table>".
4684               "</div>\n";
4685
4686         print "<div class=\"page_body\">\n";
4687         git_print_log($co{'comment'});
4688         print "</div>\n";
4689
4690         git_difftree_body(\@difftree, $hash, @$parents);
4691
4692         git_footer_html();
4693 }
4694
4695 sub git_object {
4696         # object is defined by:
4697         # - hash or hash_base alone
4698         # - hash_base and file_name
4699         my $type;
4700
4701         # - hash or hash_base alone
4702         if ($hash || ($hash_base && !defined $file_name)) {
4703                 my $object_id = $hash || $hash_base;
4704
4705                 my $git_command = git_cmd_str();
4706                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4707                         or die_error('404 Not Found', "Object does not exist");
4708                 $type = <$fd>;
4709                 chomp $type;
4710                 close $fd
4711                         or die_error('404 Not Found', "Object does not exist");
4712
4713         # - hash_base and file_name
4714         } elsif ($hash_base && defined $file_name) {
4715                 $file_name =~ s,/+$,,;
4716
4717                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4718                         or die_error('404 Not Found', "Base object does not exist");
4719
4720                 # here errors should not hapen
4721                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4722                         or die_error(undef, "Open git-ls-tree failed");
4723                 my $line = <$fd>;
4724                 close $fd;
4725
4726                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4727                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4728                         die_error('404 Not Found', "File or directory for given base does not exist");
4729                 }
4730                 $type = $2;
4731                 $hash = $3;
4732         } else {
4733                 die_error('404 Not Found', "Not enough information to find object");
4734         }
4735
4736         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4737                                           hash=>$hash, hash_base=>$hash_base,
4738                                           file_name=>$file_name),
4739                              -status => '302 Found');
4740 }
4741
4742 sub git_blobdiff {
4743         my $format = shift || 'html';
4744
4745         my $fd;
4746         my @difftree;
4747         my %diffinfo;
4748         my $expires;
4749
4750         # preparing $fd and %diffinfo for git_patchset_body
4751         # new style URI
4752         if (defined $hash_base && defined $hash_parent_base) {
4753                 if (defined $file_name) {
4754                         # read raw output
4755                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4756                                 $hash_parent_base, $hash_base,
4757                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4758                                 or die_error(undef, "Open git-diff-tree failed");
4759                         @difftree = map { chomp; $_ } <$fd>;
4760                         close $fd
4761                                 or die_error(undef, "Reading git-diff-tree failed");
4762                         @difftree
4763                                 or die_error('404 Not Found', "Blob diff not found");
4764
4765                 } elsif (defined $hash &&
4766                          $hash =~ /[0-9a-fA-F]{40}/) {
4767                         # try to find filename from $hash
4768
4769                         # read filtered raw output
4770                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4771                                 $hash_parent_base, $hash_base, "--"
4772                                 or die_error(undef, "Open git-diff-tree failed");
4773                         @difftree =
4774                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4775                                 # $hash == to_id
4776                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4777                                 map { chomp; $_ } <$fd>;
4778                         close $fd
4779                                 or die_error(undef, "Reading git-diff-tree failed");
4780                         @difftree
4781                                 or die_error('404 Not Found', "Blob diff not found");
4782
4783                 } else {
4784                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4785                 }
4786
4787                 if (@difftree > 1) {
4788                         die_error('404 Not Found', "Ambiguous blob diff specification");
4789                 }
4790
4791                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4792                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4793                 $file_name   ||= $diffinfo{'to_file'};
4794
4795                 $hash_parent ||= $diffinfo{'from_id'};
4796                 $hash        ||= $diffinfo{'to_id'};
4797
4798                 # non-textual hash id's can be cached
4799                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4800                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4801                         $expires = '+1d';
4802                 }
4803
4804                 # open patch output
4805                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4806                         '-p', ($format eq 'html' ? "--full-index" : ()),
4807                         $hash_parent_base, $hash_base,
4808                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4809                         or die_error(undef, "Open git-diff-tree failed");
4810         }
4811
4812         # old/legacy style URI -- not generated anymore since 1.4.3.
4813         if (!%diffinfo) {
4814                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4815         }
4816
4817         # header
4818         if ($format eq 'html') {
4819                 my $formats_nav =
4820                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4821                                 "raw");
4822                 git_header_html(undef, $expires);
4823                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4824                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4825                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4826                 } else {
4827                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4828                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4829                 }
4830                 if (defined $file_name) {
4831                         git_print_page_path($file_name, "blob", $hash_base);
4832                 } else {
4833                         print "<div class=\"page_path\"></div>\n";
4834                 }
4835
4836         } elsif ($format eq 'plain') {
4837                 print $cgi->header(
4838                         -type => 'text/plain',
4839                         -charset => 'utf-8',
4840                         -expires => $expires,
4841                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4842
4843                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4844
4845         } else {
4846                 die_error(undef, "Unknown blobdiff format");
4847         }
4848
4849         # patch
4850         if ($format eq 'html') {
4851                 print "<div class=\"page_body\">\n";
4852
4853                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4854                 close $fd;
4855
4856                 print "</div>\n"; # class="page_body"
4857                 git_footer_html();
4858
4859         } else {
4860                 while (my $line = <$fd>) {
4861                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4862                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4863
4864                         print $line;
4865
4866                         last if $line =~ m!^\+\+\+!;
4867                 }
4868                 local $/ = undef;
4869                 print <$fd>;
4870                 close $fd;
4871         }
4872 }
4873
4874 sub git_blobdiff_plain {
4875         git_blobdiff('plain');
4876 }
4877
4878 sub git_commitdiff {
4879         my $format = shift || 'html';
4880         $hash ||= $hash_base || "HEAD";
4881         my %co = parse_commit($hash);
4882         if (!%co) {
4883                 die_error(undef, "Unknown commit object");
4884         }
4885
4886         # choose format for commitdiff for merge
4887         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4888                 $hash_parent = '--cc';
4889         }
4890         # we need to prepare $formats_nav before almost any parameter munging
4891         my $formats_nav;
4892         if ($format eq 'html') {
4893                 $formats_nav =
4894                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4895                                 "raw");
4896
4897                 if (defined $hash_parent &&
4898                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4899                         # commitdiff with two commits given
4900                         my $hash_parent_short = $hash_parent;
4901                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4902                                 $hash_parent_short = substr($hash_parent, 0, 7);
4903                         }
4904                         $formats_nav .=
4905                                 ' (from';
4906                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4907                                 if ($co{'parents'}[$i] eq $hash_parent) {
4908                                         $formats_nav .= ' parent ' . ($i+1);
4909                                         last;
4910                                 }
4911                         }
4912                         $formats_nav .= ': ' .
4913                                 $cgi->a({-href => href(action=>"commitdiff",
4914                                                        hash=>$hash_parent)},
4915                                         esc_html($hash_parent_short)) .
4916                                 ')';
4917                 } elsif (!$co{'parent'}) {
4918                         # --root commitdiff
4919                         $formats_nav .= ' (initial)';
4920                 } elsif (scalar @{$co{'parents'}} == 1) {
4921                         # single parent commit
4922                         $formats_nav .=
4923                                 ' (parent: ' .
4924                                 $cgi->a({-href => href(action=>"commitdiff",
4925                                                        hash=>$co{'parent'})},
4926                                         esc_html(substr($co{'parent'}, 0, 7))) .
4927                                 ')';
4928                 } else {
4929                         # merge commit
4930                         if ($hash_parent eq '--cc') {
4931                                 $formats_nav .= ' | ' .
4932                                         $cgi->a({-href => href(action=>"commitdiff",
4933                                                                hash=>$hash, hash_parent=>'-c')},
4934                                                 'combined');
4935                         } else { # $hash_parent eq '-c'
4936                                 $formats_nav .= ' | ' .
4937                                         $cgi->a({-href => href(action=>"commitdiff",
4938                                                                hash=>$hash, hash_parent=>'--cc')},
4939                                                 'compact');
4940                         }
4941                         $formats_nav .=
4942                                 ' (merge: ' .
4943                                 join(' ', map {
4944                                         $cgi->a({-href => href(action=>"commitdiff",
4945                                                                hash=>$_)},
4946                                                 esc_html(substr($_, 0, 7)));
4947                                 } @{$co{'parents'}} ) .
4948                                 ')';
4949                 }
4950         }
4951
4952         my $hash_parent_param = $hash_parent;
4953         if (!defined $hash_parent_param) {
4954                 # --cc for multiple parents, --root for parentless
4955                 $hash_parent_param =
4956                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4957         }
4958
4959         # read commitdiff
4960         my $fd;
4961         my @difftree;
4962         if ($format eq 'html') {
4963                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4964                         "--no-commit-id", "--patch-with-raw", "--full-index",
4965                         $hash_parent_param, $hash, "--"
4966                         or die_error(undef, "Open git-diff-tree failed");
4967
4968                 while (my $line = <$fd>) {
4969                         chomp $line;
4970                         # empty line ends raw part of diff-tree output
4971                         last unless $line;
4972                         push @difftree, scalar parse_difftree_raw_line($line);
4973                 }
4974
4975         } elsif ($format eq 'plain') {
4976                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4977                         '-p', $hash_parent_param, $hash, "--"
4978                         or die_error(undef, "Open git-diff-tree failed");
4979
4980         } else {
4981                 die_error(undef, "Unknown commitdiff format");
4982         }
4983
4984         # non-textual hash id's can be cached
4985         my $expires;
4986         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4987                 $expires = "+1d";
4988         }
4989
4990         # write commit message
4991         if ($format eq 'html') {
4992                 my $refs = git_get_references();
4993                 my $ref = format_ref_marker($refs, $co{'id'});
4994
4995                 git_header_html(undef, $expires);
4996                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4997                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4998                 git_print_authorship(\%co);
4999                 print "<div class=\"page_body\">\n";
5000                 if (@{$co{'comment'}} > 1) {
5001                         print "<div class=\"log\">\n";
5002                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5003                         print "</div>\n"; # class="log"
5004                 }
5005
5006         } elsif ($format eq 'plain') {
5007                 my $refs = git_get_references("tags");
5008                 my $tagname = git_get_rev_name_tags($hash);
5009                 my $filename = basename($project) . "-$hash.patch";
5010
5011                 print $cgi->header(
5012                         -type => 'text/plain',
5013                         -charset => 'utf-8',
5014                         -expires => $expires,
5015                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5016                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5017                 print "From: " . to_utf8($co{'author'}) . "\n";
5018                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5019                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5020
5021                 print "X-Git-Tag: $tagname\n" if $tagname;
5022                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5023
5024                 foreach my $line (@{$co{'comment'}}) {
5025                         print to_utf8($line) . "\n";
5026                 }
5027                 print "---\n\n";
5028         }
5029
5030         # write patch
5031         if ($format eq 'html') {
5032                 my $use_parents = !defined $hash_parent ||
5033                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5034                 git_difftree_body(\@difftree, $hash,
5035                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5036                 print "<br/>\n";
5037
5038                 git_patchset_body($fd, \@difftree, $hash,
5039                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5040                 close $fd;
5041                 print "</div>\n"; # class="page_body"
5042                 git_footer_html();
5043
5044         } elsif ($format eq 'plain') {
5045                 local $/ = undef;
5046                 print <$fd>;
5047                 close $fd
5048                         or print "Reading git-diff-tree failed\n";
5049         }
5050 }
5051
5052 sub git_commitdiff_plain {
5053         git_commitdiff('plain');
5054 }
5055
5056 sub git_history {
5057         if (!defined $hash_base) {
5058                 $hash_base = git_get_head_hash($project);
5059         }
5060         if (!defined $page) {
5061                 $page = 0;
5062         }
5063         my $ftype;
5064         my %co = parse_commit($hash_base);
5065         if (!%co) {
5066                 die_error(undef, "Unknown commit object");
5067         }
5068
5069         my $refs = git_get_references();
5070         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5071
5072         if (!defined $hash && defined $file_name) {
5073                 $hash = git_get_hash_by_path($hash_base, $file_name);
5074         }
5075         if (defined $hash) {
5076                 $ftype = git_get_type($hash);
5077         }
5078
5079         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5080
5081         my $paging_nav = '';
5082         if ($page > 0) {
5083                 $paging_nav .=
5084                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5085                                                file_name=>$file_name)},
5086                                 "first");
5087                 $paging_nav .= " &sdot; " .
5088                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5089                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5090         } else {
5091                 $paging_nav .= "first";
5092                 $paging_nav .= " &sdot; prev";
5093         }
5094         my $next_link = '';
5095         if ($#commitlist >= 100) {
5096                 $next_link =
5097                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5098                                  -accesskey => "n", -title => "Alt-n"}, "next");
5099                 $paging_nav .= " &sdot; $next_link";
5100         } else {
5101                 $paging_nav .= " &sdot; next";
5102         }
5103
5104         git_header_html();
5105         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5106         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5107         git_print_page_path($file_name, $ftype, $hash_base);
5108
5109         git_history_body(\@commitlist, 0, 99,
5110                          $refs, $hash_base, $ftype, $next_link);
5111
5112         git_footer_html();
5113 }
5114
5115 sub git_search {
5116         my ($have_search) = gitweb_check_feature('search');
5117         if (!$have_search) {
5118                 die_error('403 Permission denied', "Permission denied");
5119         }
5120         if (!defined $searchtext) {
5121                 die_error(undef, "Text field empty");
5122         }
5123         if (!defined $hash) {
5124                 $hash = git_get_head_hash($project);
5125         }
5126         my %co = parse_commit($hash);
5127         if (!%co) {
5128                 die_error(undef, "Unknown commit object");
5129         }
5130         if (!defined $page) {
5131                 $page = 0;
5132         }
5133
5134         $searchtype ||= 'commit';
5135         if ($searchtype eq 'pickaxe') {
5136                 # pickaxe may take all resources of your box and run for several minutes
5137                 # with every query - so decide by yourself how public you make this feature
5138                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5139                 if (!$have_pickaxe) {
5140                         die_error('403 Permission denied', "Permission denied");
5141                 }
5142         }
5143         if ($searchtype eq 'grep') {
5144                 my ($have_grep) = gitweb_check_feature('grep');
5145                 if (!$have_grep) {
5146                         die_error('403 Permission denied', "Permission denied");
5147                 }
5148         }
5149
5150         git_header_html();
5151
5152         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5153                 my $greptype;
5154                 if ($searchtype eq 'commit') {
5155                         $greptype = "--grep=";
5156                 } elsif ($searchtype eq 'author') {
5157                         $greptype = "--author=";
5158                 } elsif ($searchtype eq 'committer') {
5159                         $greptype = "--committer=";
5160                 }
5161                 $greptype .= $search_regexp;
5162                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5163
5164                 my $paging_nav = '';
5165                 if ($page > 0) {
5166                         $paging_nav .=
5167                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5168                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5169                                         "first");
5170                         $paging_nav .= " &sdot; " .
5171                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5172                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5173                 } else {
5174                         $paging_nav .= "first";
5175                         $paging_nav .= " &sdot; prev";
5176                 }
5177                 my $next_link = '';
5178                 if ($#commitlist >= 100) {
5179                         $next_link =
5180                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5181                                          -accesskey => "n", -title => "Alt-n"}, "next");
5182                         $paging_nav .= " &sdot; $next_link";
5183                 } else {
5184                         $paging_nav .= " &sdot; next";
5185                 }
5186
5187                 if ($#commitlist >= 100) {
5188                 }
5189
5190                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5191                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5192                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5193         }
5194
5195         if ($searchtype eq 'pickaxe') {
5196                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5197                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5198
5199                 print "<table class=\"pickaxe search\">\n";
5200                 my $alternate = 1;
5201                 $/ = "\n";
5202                 my $git_command = git_cmd_str();
5203                 my $searchqtext = $searchtext;
5204                 $searchqtext =~ s/'/'\\''/;
5205                 open my $fd, "-|", "$git_command rev-list $hash | " .
5206                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5207                 undef %co;
5208                 my @files;
5209                 while (my $line = <$fd>) {
5210                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5211                                 my %set;
5212                                 $set{'file'} = $6;
5213                                 $set{'from_id'} = $3;
5214                                 $set{'to_id'} = $4;
5215                                 $set{'id'} = $set{'to_id'};
5216                                 if ($set{'id'} =~ m/0{40}/) {
5217                                         $set{'id'} = $set{'from_id'};
5218                                 }
5219                                 if ($set{'id'} =~ m/0{40}/) {
5220                                         next;
5221                                 }
5222                                 push @files, \%set;
5223                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5224                                 if (%co) {
5225                                         if ($alternate) {
5226                                                 print "<tr class=\"dark\">\n";
5227                                         } else {
5228                                                 print "<tr class=\"light\">\n";
5229                                         }
5230                                         $alternate ^= 1;
5231                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5232                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5233                                               "<td><i>" . $author . "</i></td>\n" .
5234                                               "<td>" .
5235                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5236                                                       -class => "list subject"},
5237                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5238                                         while (my $setref = shift @files) {
5239                                                 my %set = %$setref;
5240                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5241                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5242                                                               -class => "list"},
5243                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5244                                                       "<br/>\n";
5245                                         }
5246                                         print "</td>\n" .
5247                                               "<td class=\"link\">" .
5248                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5249                                               " | " .
5250                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5251                                         print "</td>\n" .
5252                                               "</tr>\n";
5253                                 }
5254                                 %co = parse_commit($1);
5255                         }
5256                 }
5257                 close $fd;
5258
5259                 print "</table>\n";
5260         }
5261
5262         if ($searchtype eq 'grep') {
5263                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5264                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5265
5266                 print "<table class=\"grep_search\">\n";
5267                 my $alternate = 1;
5268                 my $matches = 0;
5269                 $/ = "\n";
5270                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5271                 my $lastfile = '';
5272                 while (my $line = <$fd>) {
5273                         chomp $line;
5274                         my ($file, $lno, $ltext, $binary);
5275                         last if ($matches++ > 1000);
5276                         if ($line =~ /^Binary file (.+) matches$/) {
5277                                 $file = $1;
5278                                 $binary = 1;
5279                         } else {
5280                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5281                         }
5282                         if ($file ne $lastfile) {
5283                                 $lastfile and print "</td></tr>\n";
5284                                 if ($alternate++) {
5285                                         print "<tr class=\"dark\">\n";
5286                                 } else {
5287                                         print "<tr class=\"light\">\n";
5288                                 }
5289                                 print "<td class=\"list\">".
5290                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5291                                                                file_name=>"$file"),
5292                                                 -class => "list"}, esc_path($file));
5293                                 print "</td><td>\n";
5294                                 $lastfile = $file;
5295                         }
5296                         if ($binary) {
5297                                 print "<div class=\"binary\">Binary file</div>\n";
5298                         } else {
5299                                 $ltext = untabify($ltext);
5300                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5301                                         $ltext = esc_html($1, -nbsp=>1);
5302                                         $ltext .= '<span class="match">';
5303                                         $ltext .= esc_html($2, -nbsp=>1);
5304                                         $ltext .= '</span>';
5305                                         $ltext .= esc_html($3, -nbsp=>1);
5306                                 } else {
5307                                         $ltext = esc_html($ltext, -nbsp=>1);
5308                                 }
5309                                 print "<div class=\"pre\">" .
5310                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5311                                                                file_name=>"$file").'#l'.$lno,
5312                                                 -class => "linenr"}, sprintf('%4i', $lno))
5313                                         . ' ' .  $ltext . "</div>\n";
5314                         }
5315                 }
5316                 if ($lastfile) {
5317                         print "</td></tr>\n";
5318                         if ($matches > 1000) {
5319                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5320                         }
5321                 } else {
5322                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5323                 }
5324                 close $fd;
5325
5326                 print "</table>\n";
5327         }
5328         git_footer_html();
5329 }
5330
5331 sub git_search_help {
5332         git_header_html();
5333         git_print_page_nav('','', $hash,$hash,$hash);
5334         print <<EOT;
5335 <dl>
5336 <dt><b>commit</b></dt>
5337 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5338 EOT
5339         my ($have_grep) = gitweb_check_feature('grep');
5340         if ($have_grep) {
5341                 print <<EOT;
5342 <dt><b>grep</b></dt>
5343 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5344     a different one) are searched for the given
5345 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5346 (POSIX extended) and the matches are listed. On large
5347 trees, this search can take a while and put some strain on the server, so please use it with
5348 some consideration.</dd>
5349 EOT
5350         }
5351         print <<EOT;
5352 <dt><b>author</b></dt>
5353 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5354 <dt><b>committer</b></dt>
5355 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5356 EOT
5357         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5358         if ($have_pickaxe) {
5359                 print <<EOT;
5360 <dt><b>pickaxe</b></dt>
5361 <dd>All commits that caused the string to appear or disappear from any file (changes that
5362 added, removed or "modified" the string) will be listed. This search can take a while and
5363 takes a lot of strain on the server, so please use it wisely.</dd>
5364 EOT
5365         }
5366         print "</dl>\n";
5367         git_footer_html();
5368 }
5369
5370 sub git_shortlog {
5371         my $head = git_get_head_hash($project);
5372         if (!defined $hash) {
5373                 $hash = $head;
5374         }
5375         if (!defined $page) {
5376                 $page = 0;
5377         }
5378         my $refs = git_get_references();
5379
5380         my @commitlist = parse_commits($hash, 101, (100 * $page));
5381
5382         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5383         my $next_link = '';
5384         if ($#commitlist >= 100) {
5385                 $next_link =
5386                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5387                                  -accesskey => "n", -title => "Alt-n"}, "next");
5388         }
5389
5390         git_header_html();
5391         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5392         git_print_header_div('summary', $project);
5393
5394         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5395
5396         git_footer_html();
5397 }
5398
5399 ## ......................................................................
5400 ## feeds (RSS, Atom; OPML)
5401
5402 sub git_feed {
5403         my $format = shift || 'atom';
5404         my ($have_blame) = gitweb_check_feature('blame');
5405
5406         # Atom: http://www.atomenabled.org/developers/syndication/
5407         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5408         if ($format ne 'rss' && $format ne 'atom') {
5409                 die_error(undef, "Unknown web feed format");
5410         }
5411
5412         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5413         my $head = $hash || 'HEAD';
5414         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5415
5416         my %latest_commit;
5417         my %latest_date;
5418         my $content_type = "application/$format+xml";
5419         if (defined $cgi->http('HTTP_ACCEPT') &&
5420                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5421                 # browser (feed reader) prefers text/xml
5422                 $content_type = 'text/xml';
5423         }
5424         if (defined($commitlist[0])) {
5425                 %latest_commit = %{$commitlist[0]};
5426                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5427                 print $cgi->header(
5428                         -type => $content_type,
5429                         -charset => 'utf-8',
5430                         -last_modified => $latest_date{'rfc2822'});
5431         } else {
5432                 print $cgi->header(
5433                         -type => $content_type,
5434                         -charset => 'utf-8');
5435         }
5436
5437         # Optimization: skip generating the body if client asks only
5438         # for Last-Modified date.
5439         return if ($cgi->request_method() eq 'HEAD');
5440
5441         # header variables
5442         my $title = "$site_name - $project/$action";
5443         my $feed_type = 'log';
5444         if (defined $hash) {
5445                 $title .= " - '$hash'";
5446                 $feed_type = 'branch log';
5447                 if (defined $file_name) {
5448                         $title .= " :: $file_name";
5449                         $feed_type = 'history';
5450                 }
5451         } elsif (defined $file_name) {
5452                 $title .= " - $file_name";
5453                 $feed_type = 'history';
5454         }
5455         $title .= " $feed_type";
5456         my $descr = git_get_project_description($project);
5457         if (defined $descr) {
5458                 $descr = esc_html($descr);
5459         } else {
5460                 $descr = "$project " .
5461                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5462                          " feed";
5463         }
5464         my $owner = git_get_project_owner($project);
5465         $owner = esc_html($owner);
5466
5467         #header
5468         my $alt_url;
5469         if (defined $file_name) {
5470                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5471         } elsif (defined $hash) {
5472                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5473         } else {
5474                 $alt_url = href(-full=>1, action=>"summary");
5475         }
5476         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5477         if ($format eq 'rss') {
5478                 print <<XML;
5479 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5480 <channel>
5481 XML
5482                 print "<title>$title</title>\n" .
5483                       "<link>$alt_url</link>\n" .
5484                       "<description>$descr</description>\n" .
5485                       "<language>en</language>\n";
5486         } elsif ($format eq 'atom') {
5487                 print <<XML;
5488 <feed xmlns="http://www.w3.org/2005/Atom">
5489 XML
5490                 print "<title>$title</title>\n" .
5491                       "<subtitle>$descr</subtitle>\n" .
5492                       '<link rel="alternate" type="text/html" href="' .
5493                       $alt_url . '" />' . "\n" .
5494                       '<link rel="self" type="' . $content_type . '" href="' .
5495                       $cgi->self_url() . '" />' . "\n" .
5496                       "<id>" . href(-full=>1) . "</id>\n" .
5497                       # use project owner for feed author
5498                       "<author><name>$owner</name></author>\n";
5499                 if (defined $favicon) {
5500                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5501                 }
5502                 if (defined $logo_url) {
5503                         # not twice as wide as tall: 72 x 27 pixels
5504                         print "<logo>" . esc_url($logo) . "</logo>\n";
5505                 }
5506                 if (! %latest_date) {
5507                         # dummy date to keep the feed valid until commits trickle in:
5508                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5509                 } else {
5510                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5511                 }
5512         }
5513
5514         # contents
5515         for (my $i = 0; $i <= $#commitlist; $i++) {
5516                 my %co = %{$commitlist[$i]};
5517                 my $commit = $co{'id'};
5518                 # we read 150, we always show 30 and the ones more recent than 48 hours
5519                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5520                         last;
5521                 }
5522                 my %cd = parse_date($co{'author_epoch'});
5523
5524                 # get list of changed files
5525                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5526                         $co{'parent'} || "--root",
5527                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5528                         or next;
5529                 my @difftree = map { chomp; $_ } <$fd>;
5530                 close $fd
5531                         or next;
5532
5533                 # print element (entry, item)
5534                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5535                 if ($format eq 'rss') {
5536                         print "<item>\n" .
5537                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5538                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5539                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5540                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5541                               "<link>$co_url</link>\n" .
5542                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5543                               "<content:encoded>" .
5544                               "<![CDATA[\n";
5545                 } elsif ($format eq 'atom') {
5546                         print "<entry>\n" .
5547                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5548                               "<updated>$cd{'iso-8601'}</updated>\n" .
5549                               "<author>\n" .
5550                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5551                         if ($co{'author_email'}) {
5552                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5553                         }
5554                         print "</author>\n" .
5555                               # use committer for contributor
5556                               "<contributor>\n" .
5557                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5558                         if ($co{'committer_email'}) {
5559                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5560                         }
5561                         print "</contributor>\n" .
5562                               "<published>$cd{'iso-8601'}</published>\n" .
5563                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5564                               "<id>$co_url</id>\n" .
5565                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5566                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5567                 }
5568                 my $comment = $co{'comment'};
5569                 print "<pre>\n";
5570                 foreach my $line (@$comment) {
5571                         $line = esc_html($line);
5572                         print "$line\n";
5573                 }
5574                 print "</pre><ul>\n";
5575                 foreach my $difftree_line (@difftree) {
5576                         my %difftree = parse_difftree_raw_line($difftree_line);
5577                         next if !$difftree{'from_id'};
5578
5579                         my $file = $difftree{'file'} || $difftree{'to_file'};
5580
5581                         print "<li>" .
5582                               "[" .
5583                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5584                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5585                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5586                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5587                                       -title => "diff"}, 'D');
5588                         if ($have_blame) {
5589                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5590                                                              file_name=>$file, hash_base=>$commit),
5591                                               -title => "blame"}, 'B');
5592                         }
5593                         # if this is not a feed of a file history
5594                         if (!defined $file_name || $file_name ne $file) {
5595                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5596                                                              file_name=>$file, hash=>$commit),
5597                                               -title => "history"}, 'H');
5598                         }
5599                         $file = esc_path($file);
5600                         print "] ".
5601                               "$file</li>\n";
5602                 }
5603                 if ($format eq 'rss') {
5604                         print "</ul>]]>\n" .
5605                               "</content:encoded>\n" .
5606                               "</item>\n";
5607                 } elsif ($format eq 'atom') {
5608                         print "</ul>\n</div>\n" .
5609                               "</content>\n" .
5610                               "</entry>\n";
5611                 }
5612         }
5613
5614         # end of feed
5615         if ($format eq 'rss') {
5616                 print "</channel>\n</rss>\n";
5617         }       elsif ($format eq 'atom') {
5618                 print "</feed>\n";
5619         }
5620 }
5621
5622 sub git_rss {
5623         git_feed('rss');
5624 }
5625
5626 sub git_atom {
5627         git_feed('atom');
5628 }
5629
5630 sub git_opml {
5631         my @list = git_get_projects_list();
5632
5633         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5634         print <<XML;
5635 <?xml version="1.0" encoding="utf-8"?>
5636 <opml version="1.0">
5637 <head>
5638   <title>$site_name OPML Export</title>
5639 </head>
5640 <body>
5641 <outline text="git RSS feeds">
5642 XML
5643
5644         foreach my $pr (@list) {
5645                 my %proj = %$pr;
5646                 my $head = git_get_head_hash($proj{'path'});
5647                 if (!defined $head) {
5648                         next;
5649                 }
5650                 $git_dir = "$projectroot/$proj{'path'}";
5651                 my %co = parse_commit($head);
5652                 if (!%co) {
5653                         next;
5654                 }
5655
5656                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5657                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5658                 my $html = "$my_url?p=$proj{'path'};a=summary";
5659                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5660         }
5661         print <<XML;
5662 </outline>
5663 </body>
5664 </opml>
5665 XML
5666 }