git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 373
 374 # version of the core git binary
 375 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 376
 377 $projects_list ||= $projectroot;
 378
 379 # ======================================================================
 380 # input validation and dispatch
 381 our $action = $cgi->param('a');
 382 if (defined $action) {
 383         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 384                 die_error(undef, "Invalid action parameter");
 385         }
 386 }
 387
 388 # parameters which are pathnames
 389 our $project = $cgi->param('p');
 390 if (defined $project) {
 391         if (!validate_pathname($project) ||
 392             !(-d "$projectroot/$project") ||
 393             !check_head_link("$projectroot/$project") ||
 394             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 395             ($strict_export && !project_in_list($project))) {
 396                 undef $project;
 397                 die_error(undef, "No such project");
 398         }
 399 }
 400
 401 our $file_name = $cgi->param('f');
 402 if (defined $file_name) {
 403         if (!validate_pathname($file_name)) {
 404                 die_error(undef, "Invalid file parameter");
 405         }
 406 }
 407
 408 our $file_parent = $cgi->param('fp');
 409 if (defined $file_parent) {
 410         if (!validate_pathname($file_parent)) {
 411                 die_error(undef, "Invalid file parent parameter");
 412         }
 413 }
 414
 415 # parameters which are refnames
 416 our $hash = $cgi->param('h');
 417 if (defined $hash) {
 418         if (!validate_refname($hash)) {
 419                 die_error(undef, "Invalid hash parameter");
 420         }
 421 }
 422
 423 our $hash_parent = $cgi->param('hp');
 424 if (defined $hash_parent) {
 425         if (!validate_refname($hash_parent)) {
 426                 die_error(undef, "Invalid hash parent parameter");
 427         }
 428 }
 429
 430 our $hash_base = $cgi->param('hb');
 431 if (defined $hash_base) {
 432         if (!validate_refname($hash_base)) {
 433                 die_error(undef, "Invalid hash base parameter");
 434         }
 435 }
 436
 437 my %allowed_options = (
 438         "--no-merges" => [ qw(rss atom log shortlog history) ],
 439 );
 440
 441 our @extra_options = $cgi->param('opt');
 442 if (defined @extra_options) {
 443         foreach my $opt (@extra_options) {
 444                 if (not exists $allowed_options{$opt}) {
 445                         die_error(undef, "Invalid option parameter");
 446                 }
 447                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 448                         die_error(undef, "Invalid option parameter for this action");
 449                 }
 450         }
 451 }
 452
 453 our $hash_parent_base = $cgi->param('hpb');
 454 if (defined $hash_parent_base) {
 455         if (!validate_refname($hash_parent_base)) {
 456                 die_error(undef, "Invalid hash parent base parameter");
 457         }
 458 }
 459
 460 # other parameters
 461 our $page = $cgi->param('pg');
 462 if (defined $page) {
 463         if ($page =~ m/[^0-9]/) {
 464                 die_error(undef, "Invalid page parameter");
 465         }
 466 }
 467
 468 our $searchtype = $cgi->param('st');
 469 if (defined $searchtype) {
 470         if ($searchtype =~ m/[^a-z]/) {
 471                 die_error(undef, "Invalid searchtype parameter");
 472         }
 473 }
 474
 475 our $searchtext = $cgi->param('s');
 476 our $search_regexp;
 477 if (defined $searchtext) {
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         if ($params{-replay}) {
 615                 while (my ($name, $symbol) = each %mapping) {
 616                         if (!exists $params{$name}) {
 617                                 # to allow for multivalued params we use arrayref form
 618                                 $params{$name} = [ $cgi->param($symbol) ];
 619                         }
 620                 }
 621         }
 622
 623         $params{'project'} = $project unless exists $params{'project'};
 624
 625         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 626         if ($use_pathinfo) {
 627                 # use PATH_INFO for project name
 628                 $href .= "/$params{'project'}" if defined $params{'project'};
 629                 delete $params{'project'};
 630
 631                 # Summary just uses the project path URL
 632                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 633                         delete $params{'action'};
 634                 }
 635         }
 636
 637         # now encode the parameters explicitly
 638         my @result = ();
 639         for (my $i = 0; $i < @mapping; $i += 2) {
 640                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 641                 if (defined $params{$name}) {
 642                         if (ref($params{$name}) eq "ARRAY") {
 643                                 foreach my $par (@{$params{$name}}) {
 644                                         push @result, $symbol . "=" . esc_param($par);
 645                                 }
 646                         } else {
 647                                 push @result, $symbol . "=" . esc_param($params{$name});
 648                         }
 649                 }
 650         }
 651         $href .= "?" . join(';', @result) if scalar @result;
 652
 653         return $href;
 654 }
 655
 656
 657 ## ======================================================================
 658 ## validation, quoting/unquoting and escaping
 659
 660 sub validate_pathname {
 661         my $input = shift || return undef;
 662
 663         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 664         # at the beginning, at the end, and between slashes.
 665         # also this catches doubled slashes
 666         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 667                 return undef;
 668         }
 669         # no null characters
 670         if ($input =~ m!\0!) {
 671                 return undef;
 672         }
 673         return $input;
 674 }
 675
 676 sub validate_refname {
 677         my $input = shift || return undef;
 678
 679         # textual hashes are O.K.
 680         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 681                 return $input;
 682         }
 683         # it must be correct pathname
 684         $input = validate_pathname($input)
 685                 or return undef;
 686         # restrictions on ref name according to git-check-ref-format
 687         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 688                 return undef;
 689         }
 690         return $input;
 691 }
 692
 693 # decode sequences of octets in utf8 into Perl's internal form,
 694 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 695 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 696 sub to_utf8 {
 697         my $str = shift;
 698         my $res;
 699         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 700         if (defined $res) {
 701                 return $res;
 702         } else {
 703                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 704         }
 705 }
 706
 707 # quote unsafe chars, but keep the slash, even when it's not
 708 # correct, but quoted slashes look too horrible in bookmarks
 709 sub esc_param {
 710         my $str = shift;
 711         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 712         $str =~ s/\+/%2B/g;
 713         $str =~ s/ /\+/g;
 714         return $str;
 715 }
 716
 717 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 718 sub esc_url {
 719         my $str = shift;
 720         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 721         $str =~ s/\+/%2B/g;
 722         $str =~ s/ /\+/g;
 723         return $str;
 724 }
 725
 726 # replace invalid utf8 character with SUBSTITUTION sequence
 727 sub esc_html ($;%) {
 728         my $str = shift;
 729         my %opts = @_;
 730
 731         $str = to_utf8($str);
 732         $str = $cgi->escapeHTML($str);
 733         if ($opts{'-nbsp'}) {
 734                 $str =~ s/ /&nbsp;/g;
 735         }
 736         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 737         return $str;
 738 }
 739
 740 # quote control characters and escape filename to HTML
 741 sub esc_path {
 742         my $str = shift;
 743         my %opts = @_;
 744
 745         $str = to_utf8($str);
 746         $str = $cgi->escapeHTML($str);
 747         if ($opts{'-nbsp'}) {
 748                 $str =~ s/ /&nbsp;/g;
 749         }
 750         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 751         return $str;
 752 }
 753
 754 # Make control characters "printable", using character escape codes (CEC)
 755 sub quot_cec {
 756         my $cntrl = shift;
 757         my %es = ( # character escape codes, aka escape sequences
 758                    "\t" => '\t',   # tab            (HT)
 759                    "\n" => '\n',   # line feed      (LF)
 760                    "\r" => '\r',   # carrige return (CR)
 761                    "\f" => '\f',   # form feed      (FF)
 762                    "\b" => '\b',   # backspace      (BS)
 763                    "\a" => '\a',   # alarm (bell)   (BEL)
 764                    "\e" => '\e',   # escape         (ESC)
 765                    "\013" => '\v', # vertical tab   (VT)
 766                    "\000" => '\0', # nul character  (NUL)
 767                    );
 768         my $chr = ( (exists $es{$cntrl})
 769                     ? $es{$cntrl}
 770                     : sprintf('\%03o', ord($cntrl)) );
 771         return "<span class=\"cntrl\">$chr</span>";
 772 }
 773
 774 # Alternatively use unicode control pictures codepoints,
 775 # Unicode "printable representation" (PR)
 776 sub quot_upr {
 777         my $cntrl = shift;
 778         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 779         return "<span class=\"cntrl\">$chr</span>";
 780 }
 781
 782 # git may return quoted and escaped filenames
 783 sub unquote {
 784         my $str = shift;
 785
 786         sub unq {
 787                 my $seq = shift;
 788                 my %es = ( # character escape codes, aka escape sequences
 789                         't' => "\t",   # tab            (HT, TAB)
 790                         'n' => "\n",   # newline        (NL)
 791                         'r' => "\r",   # return         (CR)
 792                         'f' => "\f",   # form feed      (FF)
 793                         'b' => "\b",   # backspace      (BS)
 794                         'a' => "\a",   # alarm (bell)   (BEL)
 795                         'e' => "\e",   # escape         (ESC)
 796                         'v' => "\013", # vertical tab   (VT)
 797                 );
 798
 799                 if ($seq =~ m/^[0-7]{1,3}$/) {
 800                         # octal char sequence
 801                         return chr(oct($seq));
 802                 } elsif (exists $es{$seq}) {
 803                         # C escape sequence, aka character escape code
 804                         return $es{$seq}
 805                 }
 806                 # quoted ordinary character
 807                 return $seq;
 808         }
 809
 810         if ($str =~ m/^"(.*)"$/) {
 811                 # needs unquoting
 812                 $str = $1;
 813                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 814         }
 815         return $str;
 816 }
 817
 818 # escape tabs (convert tabs to spaces)
 819 sub untabify {
 820         my $line = shift;
 821
 822         while ((my $pos = index($line, "\t")) != -1) {
 823                 if (my $count = (8 - ($pos % 8))) {
 824                         my $spaces = ' ' x $count;
 825                         $line =~ s/\t/$spaces/;
 826                 }
 827         }
 828
 829         return $line;
 830 }
 831
 832 sub project_in_list {
 833         my $project = shift;
 834         my @list = git_get_projects_list();
 835         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 836 }
 837
 838 ## ----------------------------------------------------------------------
 839 ## HTML aware string manipulation
 840
 841 sub chop_str {
 842         my $str = shift;
 843         my $len = shift;
 844         my $add_len = shift || 10;
 845
 846         # allow only $len chars, but don't cut a word if it would fit in $add_len
 847         # if it doesn't fit, cut it if it's still longer than the dots we would add
 848         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 849         my $body = $1;
 850         my $tail = $2;
 851         if (length($tail) > 4) {
 852                 $tail = " ...";
 853                 $body =~ s/&[^;]*$//; # remove chopped character entities
 854         }
 855         return "$body$tail";
 856 }
 857
 858 # takes the same arguments as chop_str, but also wraps a <span> around the
 859 # result with a title attribute if it does get chopped. Additionally, the
 860 # string is HTML-escaped.
 861 sub chop_and_escape_str {
 862         my $str = shift;
 863         my $len = shift;
 864         my $add_len = shift || 10;
 865
 866         my $chopped = chop_str($str, $len, $add_len);
 867         if ($chopped eq $str) {
 868                 return esc_html($chopped);
 869         } else {
 870                 return qq{<span title="} . esc_html($str) . qq{">} .
 871                         esc_html($chopped) . qq{</span>};
 872         }
 873 }
 874
 875 ## ----------------------------------------------------------------------
 876 ## functions returning short strings
 877
 878 # CSS class for given age value (in seconds)
 879 sub age_class {
 880         my $age = shift;
 881
 882         if (!defined $age) {
 883                 return "noage";
 884         } elsif ($age < 60*60*2) {
 885                 return "age0";
 886         } elsif ($age < 60*60*24*2) {
 887                 return "age1";
 888         } else {
 889                 return "age2";
 890         }
 891 }
 892
 893 # convert age in seconds to "nn units ago" string
 894 sub age_string {
 895         my $age = shift;
 896         my $age_str;
 897
 898         if ($age > 60*60*24*365*2) {
 899                 $age_str = (int $age/60/60/24/365);
 900                 $age_str .= " years ago";
 901         } elsif ($age > 60*60*24*(365/12)*2) {
 902                 $age_str = int $age/60/60/24/(365/12);
 903                 $age_str .= " months ago";
 904         } elsif ($age > 60*60*24*7*2) {
 905                 $age_str = int $age/60/60/24/7;
 906                 $age_str .= " weeks ago";
 907         } elsif ($age > 60*60*24*2) {
 908                 $age_str = int $age/60/60/24;
 909                 $age_str .= " days ago";
 910         } elsif ($age > 60*60*2) {
 911                 $age_str = int $age/60/60;
 912                 $age_str .= " hours ago";
 913         } elsif ($age > 60*2) {
 914                 $age_str = int $age/60;
 915                 $age_str .= " min ago";
 916         } elsif ($age > 2) {
 917                 $age_str = int $age;
 918                 $age_str .= " sec ago";
 919         } else {
 920                 $age_str .= " right now";
 921         }
 922         return $age_str;
 923 }
 924
 925 use constant {
 926         S_IFINVALID => 0030000,
 927         S_IFGITLINK => 0160000,
 928 };
 929
 930 # submodule/subproject, a commit object reference
 931 sub S_ISGITLINK($) {
 932         my $mode = shift;
 933
 934         return (($mode & S_IFMT) == S_IFGITLINK)
 935 }
 936
 937 # convert file mode in octal to symbolic file mode string
 938 sub mode_str {
 939         my $mode = oct shift;
 940
 941         if (S_ISGITLINK($mode)) {
 942                 return 'm---------';
 943         } elsif (S_ISDIR($mode & S_IFMT)) {
 944                 return 'drwxr-xr-x';
 945         } elsif (S_ISLNK($mode)) {
 946                 return 'lrwxrwxrwx';
 947         } elsif (S_ISREG($mode)) {
 948                 # git cares only about the executable bit
 949                 if ($mode & S_IXUSR) {
 950                         return '-rwxr-xr-x';
 951                 } else {
 952                         return '-rw-r--r--';
 953                 };
 954         } else {
 955                 return '----------';
 956         }
 957 }
 958
 959 # convert file mode in octal to file type string
 960 sub file_type {
 961         my $mode = shift;
 962
 963         if ($mode !~ m/^[0-7]+$/) {
 964                 return $mode;
 965         } else {
 966                 $mode = oct $mode;
 967         }
 968
 969         if (S_ISGITLINK($mode)) {
 970                 return "submodule";
 971         } elsif (S_ISDIR($mode & S_IFMT)) {
 972                 return "directory";
 973         } elsif (S_ISLNK($mode)) {
 974                 return "symlink";
 975         } elsif (S_ISREG($mode)) {
 976                 return "file";
 977         } else {
 978                 return "unknown";
 979         }
 980 }
 981
 982 # convert file mode in octal to file type description string
 983 sub file_type_long {
 984         my $mode = shift;
 985
 986         if ($mode !~ m/^[0-7]+$/) {
 987                 return $mode;
 988         } else {
 989                 $mode = oct $mode;
 990         }
 991
 992         if (S_ISGITLINK($mode)) {
 993                 return "submodule";
 994         } elsif (S_ISDIR($mode & S_IFMT)) {
 995                 return "directory";
 996         } elsif (S_ISLNK($mode)) {
 997                 return "symlink";
 998         } elsif (S_ISREG($mode)) {
 999                 if ($mode & S_IXUSR) {
1000                         return "executable";
1001                 } else {
1002                         return "file";
1003                 };
1004         } else {
1005                 return "unknown";
1006         }
1007 }
1008
1009
1010 ## ----------------------------------------------------------------------
1011 ## functions returning short HTML fragments, or transforming HTML fragments
1012 ## which don't belong to other sections
1013
1014 # format line of commit message.
1015 sub format_log_line_html {
1016         my $line = shift;
1017
1018         $line = esc_html($line, -nbsp=>1);
1019         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1020                 my $hash_text = $1;
1021                 my $link =
1022                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1023                                 -class => "text"}, $hash_text);
1024                 $line =~ s/$hash_text/$link/;
1025         }
1026         return $line;
1027 }
1028
1029 # format marker of refs pointing to given object
1030 sub format_ref_marker {
1031         my ($refs, $id) = @_;
1032         my $markers = '';
1033
1034         if (defined $refs->{$id}) {
1035                 foreach my $ref (@{$refs->{$id}}) {
1036                         my ($type, $name) = qw();
1037                         # e.g. tags/v2.6.11 or heads/next
1038                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1039                                 $type = $1;
1040                                 $name = $2;
1041                         } else {
1042                                 $type = "ref";
1043                                 $name = $ref;
1044                         }
1045
1046                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1047                                     esc_html($name) . "</span>";
1048                 }
1049         }
1050
1051         if ($markers) {
1052                 return ' <span class="refs">'. $markers . '</span>';
1053         } else {
1054                 return "";
1055         }
1056 }
1057
1058 # format, perhaps shortened and with markers, title line
1059 sub format_subject_html {
1060         my ($long, $short, $href, $extra) = @_;
1061         $extra = '' unless defined($extra);
1062
1063         if (length($short) < length($long)) {
1064                 return $cgi->a({-href => $href, -class => "list subject",
1065                                 -title => to_utf8($long)},
1066                        esc_html($short) . $extra);
1067         } else {
1068                 return $cgi->a({-href => $href, -class => "list subject"},
1069                        esc_html($long)  . $extra);
1070         }
1071 }
1072
1073 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1074 sub format_git_diff_header_line {
1075         my $line = shift;
1076         my $diffinfo = shift;
1077         my ($from, $to) = @_;
1078
1079         if ($diffinfo->{'nparents'}) {
1080                 # combined diff
1081                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1082                 if ($to->{'href'}) {
1083                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1084                                          esc_path($to->{'file'}));
1085                 } else { # file was deleted (no href)
1086                         $line .= esc_path($to->{'file'});
1087                 }
1088         } else {
1089                 # "ordinary" diff
1090                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1091                 if ($from->{'href'}) {
1092                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1093                                          'a/' . esc_path($from->{'file'}));
1094                 } else { # file was added (no href)
1095                         $line .= 'a/' . esc_path($from->{'file'});
1096                 }
1097                 $line .= ' ';
1098                 if ($to->{'href'}) {
1099                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1100                                          'b/' . esc_path($to->{'file'}));
1101                 } else { # file was deleted
1102                         $line .= 'b/' . esc_path($to->{'file'});
1103                 }
1104         }
1105
1106         return "<div class=\"diff header\">$line</div>\n";
1107 }
1108
1109 # format extended diff header line, before patch itself
1110 sub format_extended_diff_header_line {
1111         my $line = shift;
1112         my $diffinfo = shift;
1113         my ($from, $to) = @_;
1114
1115         # match <path>
1116         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1117                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1118                                        esc_path($from->{'file'}));
1119         }
1120         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1121                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1122                                  esc_path($to->{'file'}));
1123         }
1124         # match single <mode>
1125         if ($line =~ m/\s(\d{6})$/) {
1126                 $line .= '<span class="info"> (' .
1127                          file_type_long($1) .
1128                          ')</span>';
1129         }
1130         # match <hash>
1131         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1132                 # can match only for combined diff
1133                 $line = 'index ';
1134                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1135                         if ($from->{'href'}[$i]) {
1136                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1137                                                   -class=>"hash"},
1138                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1139                         } else {
1140                                 $line .= '0' x 7;
1141                         }
1142                         # separator
1143                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1144                 }
1145                 $line .= '..';
1146                 if ($to->{'href'}) {
1147                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1148                                          substr($diffinfo->{'to_id'},0,7));
1149                 } else {
1150                         $line .= '0' x 7;
1151                 }
1152
1153         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1154                 # can match only for ordinary diff
1155                 my ($from_link, $to_link);
1156                 if ($from->{'href'}) {
1157                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1158                                              substr($diffinfo->{'from_id'},0,7));
1159                 } else {
1160                         $from_link = '0' x 7;
1161                 }
1162                 if ($to->{'href'}) {
1163                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1164                                            substr($diffinfo->{'to_id'},0,7));
1165                 } else {
1166                         $to_link = '0' x 7;
1167                 }
1168                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1169                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1170         }
1171
1172         return $line . "<br/>\n";
1173 }
1174
1175 # format from-file/to-file diff header
1176 sub format_diff_from_to_header {
1177         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1178         my $line;
1179         my $result = '';
1180
1181         $line = $from_line;
1182         #assert($line =~ m/^---/) if DEBUG;
1183         # no extra formatting for "^--- /dev/null"
1184         if (! $diffinfo->{'nparents'}) {
1185                 # ordinary (single parent) diff
1186                 if ($line =~ m!^--- "?a/!) {
1187                         if ($from->{'href'}) {
1188                                 $line = '--- a/' .
1189                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1190                                                 esc_path($from->{'file'}));
1191                         } else {
1192                                 $line = '--- a/' .
1193                                         esc_path($from->{'file'});
1194                         }
1195                 }
1196                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1197
1198         } else {
1199                 # combined diff (merge commit)
1200                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1201                         if ($from->{'href'}[$i]) {
1202                                 $line = '--- ' .
1203                                         $cgi->a({-href=>href(action=>"blobdiff",
1204                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1205                                                              hash_parent_base=>$parents[$i],
1206                                                              file_parent=>$from->{'file'}[$i],
1207                                                              hash=>$diffinfo->{'to_id'},
1208                                                              hash_base=>$hash,
1209                                                              file_name=>$to->{'file'}),
1210                                                  -class=>"path",
1211                                                  -title=>"diff" . ($i+1)},
1212                                                 $i+1) .
1213                                         '/' .
1214                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1215                                                 esc_path($from->{'file'}[$i]));
1216                         } else {
1217                                 $line = '--- /dev/null';
1218                         }
1219                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1220                 }
1221         }
1222
1223         $line = $to_line;
1224         #assert($line =~ m/^\+\+\+/) if DEBUG;
1225         # no extra formatting for "^+++ /dev/null"
1226         if ($line =~ m!^\+\+\+ "?b/!) {
1227                 if ($to->{'href'}) {
1228                         $line = '+++ b/' .
1229                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1230                                         esc_path($to->{'file'}));
1231                 } else {
1232                         $line = '+++ b/' .
1233                                 esc_path($to->{'file'});
1234                 }
1235         }
1236         $result .= qq!<div class="diff to_file">$line</div>\n!;
1237
1238         return $result;
1239 }
1240
1241 # create note for patch simplified by combined diff
1242 sub format_diff_cc_simplified {
1243         my ($diffinfo, @parents) = @_;
1244         my $result = '';
1245
1246         $result .= "<div class=\"diff header\">" .
1247                    "diff --cc ";
1248         if (!is_deleted($diffinfo)) {
1249                 $result .= $cgi->a({-href => href(action=>"blob",
1250                                                   hash_base=>$hash,
1251                                                   hash=>$diffinfo->{'to_id'},
1252                                                   file_name=>$diffinfo->{'to_file'}),
1253                                     -class => "path"},
1254                                    esc_path($diffinfo->{'to_file'}));
1255         } else {
1256                 $result .= esc_path($diffinfo->{'to_file'});
1257         }
1258         $result .= "</div>\n" . # class="diff header"
1259                    "<div class=\"diff nodifferences\">" .
1260                    "Simple merge" .
1261                    "</div>\n"; # class="diff nodifferences"
1262
1263         return $result;
1264 }
1265
1266 # format patch (diff) line (not to be used for diff headers)
1267 sub format_diff_line {
1268         my $line = shift;
1269         my ($from, $to) = @_;
1270         my $diff_class = "";
1271
1272         chomp $line;
1273
1274         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1275                 # combined diff
1276                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1277                 if ($line =~ m/^\@{3}/) {
1278                         $diff_class = " chunk_header";
1279                 } elsif ($line =~ m/^\\/) {
1280                         $diff_class = " incomplete";
1281                 } elsif ($prefix =~ tr/+/+/) {
1282                         $diff_class = " add";
1283                 } elsif ($prefix =~ tr/-/-/) {
1284                         $diff_class = " rem";
1285                 }
1286         } else {
1287                 # assume ordinary diff
1288                 my $char = substr($line, 0, 1);
1289                 if ($char eq '+') {
1290                         $diff_class = " add";
1291                 } elsif ($char eq '-') {
1292                         $diff_class = " rem";
1293                 } elsif ($char eq '@') {
1294                         $diff_class = " chunk_header";
1295                 } elsif ($char eq "\\") {
1296                         $diff_class = " incomplete";
1297                 }
1298         }
1299         $line = untabify($line);
1300         if ($from && $to && $line =~ m/^\@{2} /) {
1301                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1302                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1303
1304                 $from_lines = 0 unless defined $from_lines;
1305                 $to_lines   = 0 unless defined $to_lines;
1306
1307                 if ($from->{'href'}) {
1308                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1309                                              -class=>"list"}, $from_text);
1310                 }
1311                 if ($to->{'href'}) {
1312                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1313                                              -class=>"list"}, $to_text);
1314                 }
1315                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1316                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1317                 return "<div class=\"diff$diff_class\">$line</div>\n";
1318         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1319                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1320                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1321
1322                 @from_text = split(' ', $ranges);
1323                 for (my $i = 0; $i < @from_text; ++$i) {
1324                         ($from_start[$i], $from_nlines[$i]) =
1325                                 (split(',', substr($from_text[$i], 1)), 0);
1326                 }
1327
1328                 $to_text   = pop @from_text;
1329                 $to_start  = pop @from_start;
1330                 $to_nlines = pop @from_nlines;
1331
1332                 $line = "<span class=\"chunk_info\">$prefix ";
1333                 for (my $i = 0; $i < @from_text; ++$i) {
1334                         if ($from->{'href'}[$i]) {
1335                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1336                                                   -class=>"list"}, $from_text[$i]);
1337                         } else {
1338                                 $line .= $from_text[$i];
1339                         }
1340                         $line .= " ";
1341                 }
1342                 if ($to->{'href'}) {
1343                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1344                                           -class=>"list"}, $to_text);
1345                 } else {
1346                         $line .= $to_text;
1347                 }
1348                 $line .= " $prefix</span>" .
1349                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1350                 return "<div class=\"diff$diff_class\">$line</div>\n";
1351         }
1352         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1353 }
1354
1355 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1356 # linked.  Pass the hash of the tree/commit to snapshot.
1357 sub format_snapshot_links {
1358         my ($hash) = @_;
1359         my @snapshot_fmts = gitweb_check_feature('snapshot');
1360         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1361         my $num_fmts = @snapshot_fmts;
1362         if ($num_fmts > 1) {
1363                 # A parenthesized list of links bearing format names.
1364                 # e.g. "snapshot (_tar.gz_ _zip_)"
1365                 return "snapshot (" . join(' ', map
1366                         $cgi->a({
1367                                 -href => href(
1368                                         action=>"snapshot",
1369                                         hash=>$hash,
1370                                         snapshot_format=>$_
1371                                 )
1372                         }, $known_snapshot_formats{$_}{'display'})
1373                 , @snapshot_fmts) . ")";
1374         } elsif ($num_fmts == 1) {
1375                 # A single "snapshot" link whose tooltip bears the format name.
1376                 # i.e. "_snapshot_"
1377                 my ($fmt) = @snapshot_fmts;
1378                 return
1379                         $cgi->a({
1380                                 -href => href(
1381                                         action=>"snapshot",
1382                                         hash=>$hash,
1383                                         snapshot_format=>$fmt
1384                                 ),
1385                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1386                         }, "snapshot");
1387         } else { # $num_fmts == 0
1388                 return undef;
1389         }
1390 }
1391
1392 ## ----------------------------------------------------------------------
1393 ## git utility subroutines, invoking git commands
1394
1395 # returns path to the core git executable and the --git-dir parameter as list
1396 sub git_cmd {
1397         return $GIT, '--git-dir='.$git_dir;
1398 }
1399
1400 # returns path to the core git executable and the --git-dir parameter as string
1401 sub git_cmd_str {
1402         return join(' ', git_cmd());
1403 }
1404
1405 # get HEAD ref of given project as hash
1406 sub git_get_head_hash {
1407         my $project = shift;
1408         my $o_git_dir = $git_dir;
1409         my $retval = undef;
1410         $git_dir = "$projectroot/$project";
1411         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1412                 my $head = <$fd>;
1413                 close $fd;
1414                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1415                         $retval = $1;
1416                 }
1417         }
1418         if (defined $o_git_dir) {
1419                 $git_dir = $o_git_dir;
1420         }
1421         return $retval;
1422 }
1423
1424 # get type of given object
1425 sub git_get_type {
1426         my $hash = shift;
1427
1428         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1429         my $type = <$fd>;
1430         close $fd or return;
1431         chomp $type;
1432         return $type;
1433 }
1434
1435 # repository configuration
1436 our $config_file = '';
1437 our %config;
1438
1439 # store multiple values for single key as anonymous array reference
1440 # single values stored directly in the hash, not as [ <value> ]
1441 sub hash_set_multi {
1442         my ($hash, $key, $value) = @_;
1443
1444         if (!exists $hash->{$key}) {
1445                 $hash->{$key} = $value;
1446         } elsif (!ref $hash->{$key}) {
1447                 $hash->{$key} = [ $hash->{$key}, $value ];
1448         } else {
1449                 push @{$hash->{$key}}, $value;
1450         }
1451 }
1452
1453 # return hash of git project configuration
1454 # optionally limited to some section, e.g. 'gitweb'
1455 sub git_parse_project_config {
1456         my $section_regexp = shift;
1457         my %config;
1458
1459         local $/ = "\0";
1460
1461         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1462                 or return;
1463
1464         while (my $keyval = <$fh>) {
1465                 chomp $keyval;
1466                 my ($key, $value) = split(/\n/, $keyval, 2);
1467
1468                 hash_set_multi(\%config, $key, $value)
1469                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1470         }
1471         close $fh;
1472
1473         return %config;
1474 }
1475
1476 # convert config value to boolean, 'true' or 'false'
1477 # no value, number > 0, 'true' and 'yes' values are true
1478 # rest of values are treated as false (never as error)
1479 sub config_to_bool {
1480         my $val = shift;
1481
1482         # strip leading and trailing whitespace
1483         $val =~ s/^\s+//;
1484         $val =~ s/\s+$//;
1485
1486         return (!defined $val ||               # section.key
1487                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1488                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1489 }
1490
1491 # convert config value to simple decimal number
1492 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1493 # to be multiplied by 1024, 1048576, or 1073741824
1494 sub config_to_int {
1495         my $val = shift;
1496
1497         # strip leading and trailing whitespace
1498         $val =~ s/^\s+//;
1499         $val =~ s/\s+$//;
1500
1501         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1502                 $unit = lc($unit);
1503                 # unknown unit is treated as 1
1504                 return $num * ($unit eq 'g' ? 1073741824 :
1505                                $unit eq 'm' ?    1048576 :
1506                                $unit eq 'k' ?       1024 : 1);
1507         }
1508         return $val;
1509 }
1510
1511 # convert config value to array reference, if needed
1512 sub config_to_multi {
1513         my $val = shift;
1514
1515         return ref($val) ? $val : [ $val ];
1516 }
1517
1518 sub git_get_project_config {
1519         my ($key, $type) = @_;
1520
1521         # key sanity check
1522         return unless ($key);
1523         $key =~ s/^gitweb\.//;
1524         return if ($key =~ m/\W/);
1525
1526         # type sanity check
1527         if (defined $type) {
1528                 $type =~ s/^--//;
1529                 $type = undef
1530                         unless ($type eq 'bool' || $type eq 'int');
1531         }
1532
1533         # get config
1534         if (!defined $config_file ||
1535             $config_file ne "$git_dir/config") {
1536                 %config = git_parse_project_config('gitweb');
1537                 $config_file = "$git_dir/config";
1538         }
1539
1540         # ensure given type
1541         if (!defined $type) {
1542                 return $config{"gitweb.$key"};
1543         } elsif ($type eq 'bool') {
1544                 # backward compatibility: 'git config --bool' returns true/false
1545                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1546         } elsif ($type eq 'int') {
1547                 return config_to_int($config{"gitweb.$key"});
1548         }
1549         return $config{"gitweb.$key"};
1550 }
1551
1552 # get hash of given path at given ref
1553 sub git_get_hash_by_path {
1554         my $base = shift;
1555         my $path = shift || return undef;
1556         my $type = shift;
1557
1558         $path =~ s,/+$,,;
1559
1560         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1561                 or die_error(undef, "Open git-ls-tree failed");
1562         my $line = <$fd>;
1563         close $fd or return undef;
1564
1565         if (!defined $line) {
1566                 # there is no tree or hash given by $path at $base
1567                 return undef;
1568         }
1569
1570         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1571         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1572         if (defined $type && $type ne $2) {
1573                 # type doesn't match
1574                 return undef;
1575         }
1576         return $3;
1577 }
1578
1579 # get path of entry with given hash at given tree-ish (ref)
1580 # used to get 'from' filename for combined diff (merge commit) for renames
1581 sub git_get_path_by_hash {
1582         my $base = shift || return;
1583         my $hash = shift || return;
1584
1585         local $/ = "\0";
1586
1587         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1588                 or return undef;
1589         while (my $line = <$fd>) {
1590                 chomp $line;
1591
1592                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1593                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1594                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1595                         close $fd;
1596                         return $1;
1597                 }
1598         }
1599         close $fd;
1600         return undef;
1601 }
1602
1603 ## ......................................................................
1604 ## git utility functions, directly accessing git repository
1605
1606 sub git_get_project_description {
1607         my $path = shift;
1608
1609         $git_dir = "$projectroot/$path";
1610         open my $fd, "$projectroot/$path/description"
1611                 or return git_get_project_config('description');
1612         my $descr = <$fd>;
1613         close $fd;
1614         if (defined $descr) {
1615                 chomp $descr;
1616         }
1617         return $descr;
1618 }
1619
1620 sub git_get_project_url_list {
1621         my $path = shift;
1622
1623         $git_dir = "$projectroot/$path";
1624         open my $fd, "$projectroot/$path/cloneurl"
1625                 or return wantarray ?
1626                 @{ config_to_multi(git_get_project_config('url')) } :
1627                    config_to_multi(git_get_project_config('url'));
1628         my @git_project_url_list = map { chomp; $_ } <$fd>;
1629         close $fd;
1630
1631         return wantarray ? @git_project_url_list : \@git_project_url_list;
1632 }
1633
1634 sub git_get_projects_list {
1635         my ($filter) = @_;
1636         my @list;
1637
1638         $filter ||= '';
1639         $filter =~ s/\.git$//;
1640
1641         my ($check_forks) = gitweb_check_feature('forks');
1642
1643         if (-d $projects_list) {
1644                 # search in directory
1645                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1646                 # remove the trailing "/"
1647                 $dir =~ s!/+$!!;
1648                 my $pfxlen = length("$dir");
1649                 my $pfxdepth = ($dir =~ tr!/!!);
1650
1651                 File::Find::find({
1652                         follow_fast => 1, # follow symbolic links
1653                         follow_skip => 2, # ignore duplicates
1654                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1655                         wanted => sub {
1656                                 # skip project-list toplevel, if we get it.
1657                                 return if (m!^[/.]$!);
1658                                 # only directories can be git repositories
1659                                 return unless (-d $_);
1660                                 # don't traverse too deep (Find is super slow on os x)
1661                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1662                                         $File::Find::prune = 1;
1663                                         return;
1664                                 }
1665
1666                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1667                                 # we check related file in $projectroot
1668                                 if ($check_forks and $subdir =~ m#/.#) {
1669                                         $File::Find::prune = 1;
1670                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1671                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1672                                         $File::Find::prune = 1;
1673                                 }
1674                         },
1675                 }, "$dir");
1676
1677         } elsif (-f $projects_list) {
1678                 # read from file(url-encoded):
1679                 # 'git%2Fgit.git Linus+Torvalds'
1680                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1681                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1682                 my %paths;
1683                 open my ($fd), $projects_list or return;
1684         PROJECT:
1685                 while (my $line = <$fd>) {
1686                         chomp $line;
1687                         my ($path, $owner) = split ' ', $line;
1688                         $path = unescape($path);
1689                         $owner = unescape($owner);
1690                         if (!defined $path) {
1691                                 next;
1692                         }
1693                         if ($filter ne '') {
1694                                 # looking for forks;
1695                                 my $pfx = substr($path, 0, length($filter));
1696                                 if ($pfx ne $filter) {
1697                                         next PROJECT;
1698                                 }
1699                                 my $sfx = substr($path, length($filter));
1700                                 if ($sfx !~ /^\/.*\.git$/) {
1701                                         next PROJECT;
1702                                 }
1703                         } elsif ($check_forks) {
1704                         PATH:
1705                                 foreach my $filter (keys %paths) {
1706                                         # looking for forks;
1707                                         my $pfx = substr($path, 0, length($filter));
1708                                         if ($pfx ne $filter) {
1709                                                 next PATH;
1710                                         }
1711                                         my $sfx = substr($path, length($filter));
1712                                         if ($sfx !~ /^\/.*\.git$/) {
1713                                                 next PATH;
1714                                         }
1715                                         # is a fork, don't include it in
1716                                         # the list
1717                                         next PROJECT;
1718                                 }
1719                         }
1720                         if (check_export_ok("$projectroot/$path")) {
1721                                 my $pr = {
1722                                         path => $path,
1723                                         owner => to_utf8($owner),
1724                                 };
1725                                 push @list, $pr;
1726                                 (my $forks_path = $path) =~ s/\.git$//;
1727                                 $paths{$forks_path}++;
1728                         }
1729                 }
1730                 close $fd;
1731         }
1732         return @list;
1733 }
1734
1735 our $gitweb_project_owner = undef;
1736 sub git_get_project_list_from_file {
1737
1738         return if (defined $gitweb_project_owner);
1739
1740         $gitweb_project_owner = {};
1741         # read from file (url-encoded):
1742         # 'git%2Fgit.git Linus+Torvalds'
1743         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1744         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1745         if (-f $projects_list) {
1746                 open (my $fd , $projects_list);
1747                 while (my $line = <$fd>) {
1748                         chomp $line;
1749                         my ($pr, $ow) = split ' ', $line;
1750                         $pr = unescape($pr);
1751                         $ow = unescape($ow);
1752                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1753                 }
1754                 close $fd;
1755         }
1756 }
1757
1758 sub git_get_project_owner {
1759         my $project = shift;
1760         my $owner;
1761
1762         return undef unless $project;
1763
1764         if (!defined $gitweb_project_owner) {
1765                 git_get_project_list_from_file();
1766         }
1767
1768         if (exists $gitweb_project_owner->{$project}) {
1769                 $owner = $gitweb_project_owner->{$project};
1770         }
1771         if (!defined $owner) {
1772                 $owner = get_file_owner("$projectroot/$project");
1773         }
1774
1775         return $owner;
1776 }
1777
1778 sub git_get_last_activity {
1779         my ($path) = @_;
1780         my $fd;
1781
1782         $git_dir = "$projectroot/$path";
1783         open($fd, "-|", git_cmd(), 'for-each-ref',
1784              '--format=%(committer)',
1785              '--sort=-committerdate',
1786              '--count=1',
1787              'refs/heads') or return;
1788         my $most_recent = <$fd>;
1789         close $fd or return;
1790         if (defined $most_recent &&
1791             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1792                 my $timestamp = $1;
1793                 my $age = time - $timestamp;
1794                 return ($age, age_string($age));
1795         }
1796         return (undef, undef);
1797 }
1798
1799 sub git_get_references {
1800         my $type = shift || "";
1801         my %refs;
1802         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1803         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1804         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1805                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1806                 or return;
1807
1808         while (my $line = <$fd>) {
1809                 chomp $line;
1810                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1811                         if (defined $refs{$1}) {
1812                                 push @{$refs{$1}}, $2;
1813                         } else {
1814                                 $refs{$1} = [ $2 ];
1815                         }
1816                 }
1817         }
1818         close $fd or return;
1819         return \%refs;
1820 }
1821
1822 sub git_get_rev_name_tags {
1823         my $hash = shift || return undef;
1824
1825         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1826                 or return;
1827         my $name_rev = <$fd>;
1828         close $fd;
1829
1830         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1831                 return $1;
1832         } else {
1833                 # catches also '$hash undefined' output
1834                 return undef;
1835         }
1836 }
1837
1838 ## ----------------------------------------------------------------------
1839 ## parse to hash functions
1840
1841 sub parse_date {
1842         my $epoch = shift;
1843         my $tz = shift || "-0000";
1844
1845         my %date;
1846         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1847         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1848         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1849         $date{'hour'} = $hour;
1850         $date{'minute'} = $min;
1851         $date{'mday'} = $mday;
1852         $date{'day'} = $days[$wday];
1853         $date{'month'} = $months[$mon];
1854         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1855                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1856         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1857                              $mday, $months[$mon], $hour ,$min;
1858         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1859                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1860
1861         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1862         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1863         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1864         $date{'hour_local'} = $hour;
1865         $date{'minute_local'} = $min;
1866         $date{'tz_local'} = $tz;
1867         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1868                                   1900+$year, $mon+1, $mday,
1869                                   $hour, $min, $sec, $tz);
1870         return %date;
1871 }
1872
1873 sub parse_tag {
1874         my $tag_id = shift;
1875         my %tag;
1876         my @comment;
1877
1878         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1879         $tag{'id'} = $tag_id;
1880         while (my $line = <$fd>) {
1881                 chomp $line;
1882                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1883                         $tag{'object'} = $1;
1884                 } elsif ($line =~ m/^type (.+)$/) {
1885                         $tag{'type'} = $1;
1886                 } elsif ($line =~ m/^tag (.+)$/) {
1887                         $tag{'name'} = $1;
1888                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1889                         $tag{'author'} = $1;
1890                         $tag{'epoch'} = $2;
1891                         $tag{'tz'} = $3;
1892                 } elsif ($line =~ m/--BEGIN/) {
1893                         push @comment, $line;
1894                         last;
1895                 } elsif ($line eq "") {
1896                         last;
1897                 }
1898         }
1899         push @comment, <$fd>;
1900         $tag{'comment'} = \@comment;
1901         close $fd or return;
1902         if (!defined $tag{'name'}) {
1903                 return
1904         };
1905         return %tag
1906 }
1907
1908 sub parse_commit_text {
1909         my ($commit_text, $withparents) = @_;
1910         my @commit_lines = split '\n', $commit_text;
1911         my %co;
1912
1913         pop @commit_lines; # Remove '\0'
1914
1915         if (! @commit_lines) {
1916                 return;
1917         }
1918
1919         my $header = shift @commit_lines;
1920         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1921                 return;
1922         }
1923         ($co{'id'}, my @parents) = split ' ', $header;
1924         while (my $line = shift @commit_lines) {
1925                 last if $line eq "\n";
1926                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1927                         $co{'tree'} = $1;
1928                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1929                         push @parents, $1;
1930                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1931                         $co{'author'} = $1;
1932                         $co{'author_epoch'} = $2;
1933                         $co{'author_tz'} = $3;
1934                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1935                                 $co{'author_name'}  = $1;
1936                                 $co{'author_email'} = $2;
1937                         } else {
1938                                 $co{'author_name'} = $co{'author'};
1939                         }
1940                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1941                         $co{'committer'} = $1;
1942                         $co{'committer_epoch'} = $2;
1943                         $co{'committer_tz'} = $3;
1944                         $co{'committer_name'} = $co{'committer'};
1945                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1946                                 $co{'committer_name'}  = $1;
1947                                 $co{'committer_email'} = $2;
1948                         } else {
1949                                 $co{'committer_name'} = $co{'committer'};
1950                         }
1951                 }
1952         }
1953         if (!defined $co{'tree'}) {
1954                 return;
1955         };
1956         $co{'parents'} = \@parents;
1957         $co{'parent'} = $parents[0];
1958
1959         foreach my $title (@commit_lines) {
1960                 $title =~ s/^    //;
1961                 if ($title ne "") {
1962                         $co{'title'} = chop_str($title, 80, 5);
1963                         # remove leading stuff of merges to make the interesting part visible
1964                         if (length($title) > 50) {
1965                                 $title =~ s/^Automatic //;
1966                                 $title =~ s/^merge (of|with) /Merge ... /i;
1967                                 if (length($title) > 50) {
1968                                         $title =~ s/(http|rsync):\/\///;
1969                                 }
1970                                 if (length($title) > 50) {
1971                                         $title =~ s/(master|www|rsync)\.//;
1972                                 }
1973                                 if (length($title) > 50) {
1974                                         $title =~ s/kernel.org:?//;
1975                                 }
1976                                 if (length($title) > 50) {
1977                                         $title =~ s/\/pub\/scm//;
1978                                 }
1979                         }
1980                         $co{'title_short'} = chop_str($title, 50, 5);
1981                         last;
1982                 }
1983         }
1984         if ($co{'title'} eq "") {
1985                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1986         }
1987         # remove added spaces
1988         foreach my $line (@commit_lines) {
1989                 $line =~ s/^    //;
1990         }
1991         $co{'comment'} = \@commit_lines;
1992
1993         my $age = time - $co{'committer_epoch'};
1994         $co{'age'} = $age;
1995         $co{'age_string'} = age_string($age);
1996         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1997         if ($age > 60*60*24*7*2) {
1998                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1999                 $co{'age_string_age'} = $co{'age_string'};
2000         } else {
2001                 $co{'age_string_date'} = $co{'age_string'};
2002                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2003         }
2004         return %co;
2005 }
2006
2007 sub parse_commit {
2008         my ($commit_id) = @_;
2009         my %co;
2010
2011         local $/ = "\0";
2012
2013         open my $fd, "-|", git_cmd(), "rev-list",
2014                 "--parents",
2015                 "--header",
2016                 "--max-count=1",
2017                 $commit_id,
2018                 "--",
2019                 or die_error(undef, "Open git-rev-list failed");
2020         %co = parse_commit_text(<$fd>, 1);
2021         close $fd;
2022
2023         return %co;
2024 }
2025
2026 sub parse_commits {
2027         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
2028         my @cos;
2029
2030         $maxcount ||= 1;
2031         $skip ||= 0;
2032
2033         local $/ = "\0";
2034
2035         open my $fd, "-|", git_cmd(), "rev-list",
2036                 "--header",
2037                 ($arg ? ($arg) : ()),
2038                 ("--max-count=" . $maxcount),
2039                 ("--skip=" . $skip),
2040                 @extra_options,
2041                 $commit_id,
2042                 "--",
2043                 ($filename ? ($filename) : ())
2044                 or die_error(undef, "Open git-rev-list failed");
2045         while (my $line = <$fd>) {
2046                 my %co = parse_commit_text($line);
2047                 push @cos, \%co;
2048         }
2049         close $fd;
2050
2051         return wantarray ? @cos : \@cos;
2052 }
2053
2054 # parse ref from ref_file, given by ref_id, with given type
2055 sub parse_ref {
2056         my $ref_file = shift;
2057         my $ref_id = shift;
2058         my $type = shift || git_get_type($ref_id);
2059         my %ref_item;
2060
2061         $ref_item{'type'} = $type;
2062         $ref_item{'id'} = $ref_id;
2063         $ref_item{'epoch'} = 0;
2064         $ref_item{'age'} = "unknown";
2065         if ($type eq "tag") {
2066                 my %tag = parse_tag($ref_id);
2067                 $ref_item{'comment'} = $tag{'comment'};
2068                 if ($tag{'type'} eq "commit") {
2069                         my %co = parse_commit($tag{'object'});
2070                         $ref_item{'epoch'} = $co{'committer_epoch'};
2071                         $ref_item{'age'} = $co{'age_string'};
2072                 } elsif (defined($tag{'epoch'})) {
2073                         my $age = time - $tag{'epoch'};
2074                         $ref_item{'epoch'} = $tag{'epoch'};
2075                         $ref_item{'age'} = age_string($age);
2076                 }
2077                 $ref_item{'reftype'} = $tag{'type'};
2078                 $ref_item{'name'} = $tag{'name'};
2079                 $ref_item{'refid'} = $tag{'object'};
2080         } elsif ($type eq "commit"){
2081                 my %co = parse_commit($ref_id);
2082                 $ref_item{'reftype'} = "commit";
2083                 $ref_item{'name'} = $ref_file;
2084                 $ref_item{'title'} = $co{'title'};
2085                 $ref_item{'refid'} = $ref_id;
2086                 $ref_item{'epoch'} = $co{'committer_epoch'};
2087                 $ref_item{'age'} = $co{'age_string'};
2088         } else {
2089                 $ref_item{'reftype'} = $type;
2090                 $ref_item{'name'} = $ref_file;
2091                 $ref_item{'refid'} = $ref_id;
2092         }
2093
2094         return %ref_item;
2095 }
2096
2097 # parse line of git-diff-tree "raw" output
2098 sub parse_difftree_raw_line {
2099         my $line = shift;
2100         my %res;
2101
2102         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2103         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2104         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2105                 $res{'from_mode'} = $1;
2106                 $res{'to_mode'} = $2;
2107                 $res{'from_id'} = $3;
2108                 $res{'to_id'} = $4;
2109                 $res{'status'} = $res{'status_str'} = $5;
2110                 $res{'similarity'} = $6;
2111                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2112                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2113                 } else {
2114                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2115                 }
2116         }
2117         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2118         # combined diff (for merge commit)
2119         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2120                 $res{'nparents'}  = length($1);
2121                 $res{'from_mode'} = [ split(' ', $2) ];
2122                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2123                 $res{'from_id'} = [ split(' ', $3) ];
2124                 $res{'to_id'} = pop @{$res{'from_id'}};
2125                 $res{'status_str'} = $4;
2126                 $res{'status'} = [ split('', $4) ];
2127                 $res{'to_file'} = unquote($5);
2128         }
2129         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2130         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2131                 $res{'commit'} = $1;
2132         }
2133
2134         return wantarray ? %res : \%res;
2135 }
2136
2137 # wrapper: return parsed line of git-diff-tree "raw" output
2138 # (the argument might be raw line, or parsed info)
2139 sub parsed_difftree_line {
2140         my $line_or_ref = shift;
2141
2142         if (ref($line_or_ref) eq "HASH") {
2143                 # pre-parsed (or generated by hand)
2144                 return $line_or_ref;
2145         } else {
2146                 return parse_difftree_raw_line($line_or_ref);
2147         }
2148 }
2149
2150 # parse line of git-ls-tree output
2151 sub parse_ls_tree_line ($;%) {
2152         my $line = shift;
2153         my %opts = @_;
2154         my %res;
2155
2156         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2157         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2158
2159         $res{'mode'} = $1;
2160         $res{'type'} = $2;
2161         $res{'hash'} = $3;
2162         if ($opts{'-z'}) {
2163                 $res{'name'} = $4;
2164         } else {
2165                 $res{'name'} = unquote($4);
2166         }
2167
2168         return wantarray ? %res : \%res;
2169 }
2170
2171 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2172 sub parse_from_to_diffinfo {
2173         my ($diffinfo, $from, $to, @parents) = @_;
2174
2175         if ($diffinfo->{'nparents'}) {
2176                 # combined diff
2177                 $from->{'file'} = [];
2178                 $from->{'href'} = [];
2179                 fill_from_file_info($diffinfo, @parents)
2180                         unless exists $diffinfo->{'from_file'};
2181                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2182                         $from->{'file'}[$i] =
2183                                 defined $diffinfo->{'from_file'}[$i] ?
2184                                         $diffinfo->{'from_file'}[$i] :
2185                                         $diffinfo->{'to_file'};
2186                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2187                                 $from->{'href'}[$i] = href(action=>"blob",
2188                                                            hash_base=>$parents[$i],
2189                                                            hash=>$diffinfo->{'from_id'}[$i],
2190                                                            file_name=>$from->{'file'}[$i]);
2191                         } else {
2192                                 $from->{'href'}[$i] = undef;
2193                         }
2194                 }
2195         } else {
2196                 # ordinary (not combined) diff
2197                 $from->{'file'} = $diffinfo->{'from_file'};
2198                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2199                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2200                                                hash=>$diffinfo->{'from_id'},
2201                                                file_name=>$from->{'file'});
2202                 } else {
2203                         delete $from->{'href'};
2204                 }
2205         }
2206
2207         $to->{'file'} = $diffinfo->{'to_file'};
2208         if (!is_deleted($diffinfo)) { # file exists in result
2209                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2210                                      hash=>$diffinfo->{'to_id'},
2211                                      file_name=>$to->{'file'});
2212         } else {
2213                 delete $to->{'href'};
2214         }
2215 }
2216
2217 ## ......................................................................
2218 ## parse to array of hashes functions
2219
2220 sub git_get_heads_list {
2221         my $limit = shift;
2222         my @headslist;
2223
2224         open my $fd, '-|', git_cmd(), 'for-each-ref',
2225                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2226                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2227                 'refs/heads'
2228                 or return;
2229         while (my $line = <$fd>) {
2230                 my %ref_item;
2231
2232                 chomp $line;
2233                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2234                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2235                 my ($committer, $epoch, $tz) =
2236                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
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                 $name =~ s!^refs/tags/!!;
2275
2276                 $ref_item{'type'} = $type;
2277                 $ref_item{'id'} = $id;
2278                 $ref_item{'name'} = $name;
2279                 if ($type eq "tag") {
2280                         $ref_item{'subject'} = $title;
2281                         $ref_item{'reftype'} = $reftype;
2282                         $ref_item{'refid'}   = $refid;
2283                 } else {
2284                         $ref_item{'reftype'} = $type;
2285                         $ref_item{'refid'}   = $id;
2286                 }
2287
2288                 if ($type eq "tag" || $type eq "commit") {
2289                         $ref_item{'epoch'} = $epoch;
2290                         if ($epoch) {
2291                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2292                         } else {
2293                                 $ref_item{'age'} = "unknown";
2294                         }
2295                 }
2296
2297                 push @tagslist, \%ref_item;
2298         }
2299         close $fd;
2300
2301         return wantarray ? @tagslist : \@tagslist;
2302 }
2303
2304 ## ----------------------------------------------------------------------
2305 ## filesystem-related functions
2306
2307 sub get_file_owner {
2308         my $path = shift;
2309
2310         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2311         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2312         if (!defined $gcos) {
2313                 return undef;
2314         }
2315         my $owner = $gcos;
2316         $owner =~ s/[,;].*$//;
2317         return to_utf8($owner);
2318 }
2319
2320 ## ......................................................................
2321 ## mimetype related functions
2322
2323 sub mimetype_guess_file {
2324         my $filename = shift;
2325         my $mimemap = shift;
2326         -r $mimemap or return undef;
2327
2328         my %mimemap;
2329         open(MIME, $mimemap) or return undef;
2330         while (<MIME>) {
2331                 next if m/^#/; # skip comments
2332                 my ($mime, $exts) = split(/\t+/);
2333                 if (defined $exts) {
2334                         my @exts = split(/\s+/, $exts);
2335                         foreach my $ext (@exts) {
2336                                 $mimemap{$ext} = $mime;
2337                         }
2338                 }
2339         }
2340         close(MIME);
2341
2342         $filename =~ /\.([^.]*)$/;
2343         return $mimemap{$1};
2344 }
2345
2346 sub mimetype_guess {
2347         my $filename = shift;
2348         my $mime;
2349         $filename =~ /\./ or return undef;
2350
2351         if ($mimetypes_file) {
2352                 my $file = $mimetypes_file;
2353                 if ($file !~ m!^/!) { # if it is relative path
2354                         # it is relative to project
2355                         $file = "$projectroot/$project/$file";
2356                 }
2357                 $mime = mimetype_guess_file($filename, $file);
2358         }
2359         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2360         return $mime;
2361 }
2362
2363 sub blob_mimetype {
2364         my $fd = shift;
2365         my $filename = shift;
2366
2367         if ($filename) {
2368                 my $mime = mimetype_guess($filename);
2369                 $mime and return $mime;
2370         }
2371
2372         # just in case
2373         return $default_blob_plain_mimetype unless $fd;
2374
2375         if (-T $fd) {
2376                 return 'text/plain' .
2377                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2378         } elsif (! $filename) {
2379                 return 'application/octet-stream';
2380         } elsif ($filename =~ m/\.png$/i) {
2381                 return 'image/png';
2382         } elsif ($filename =~ m/\.gif$/i) {
2383                 return 'image/gif';
2384         } elsif ($filename =~ m/\.jpe?g$/i) {
2385                 return 'image/jpeg';
2386         } else {
2387                 return 'application/octet-stream';
2388         }
2389 }
2390
2391 ## ======================================================================
2392 ## functions printing HTML: header, footer, error page
2393
2394 sub git_header_html {
2395         my $status = shift || "200 OK";
2396         my $expires = shift;
2397
2398         my $title = "$site_name";
2399         if (defined $project) {
2400                 $title .= " - " . to_utf8($project);
2401                 if (defined $action) {
2402                         $title .= "/$action";
2403                         if (defined $file_name) {
2404                                 $title .= " - " . esc_path($file_name);
2405                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2406                                         $title .= "/";
2407                                 }
2408                         }
2409                 }
2410         }
2411         my $content_type;
2412         # require explicit support from the UA if we are to send the page as
2413         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2414         # we have to do this because MSIE sometimes globs '*/*', pretending to
2415         # support xhtml+xml but choking when it gets what it asked for.
2416         if (defined $cgi->http('HTTP_ACCEPT') &&
2417             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2418             $cgi->Accept('application/xhtml+xml') != 0) {
2419                 $content_type = 'application/xhtml+xml';
2420         } else {
2421                 $content_type = 'text/html';
2422         }
2423         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2424                            -status=> $status, -expires => $expires);
2425         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2426         print <<EOF;
2427 <?xml version="1.0" encoding="utf-8"?>
2428 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2429 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2430 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2431 <!-- git core binaries version $git_version -->
2432 <head>
2433 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2434 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2435 <meta name="robots" content="index, nofollow"/>
2436 <title>$title</title>
2437 EOF
2438 # print out each stylesheet that exist
2439         if (defined $stylesheet) {
2440 #provides backwards capability for those people who define style sheet in a config file
2441                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2442         } else {
2443                 foreach my $stylesheet (@stylesheets) {
2444                         next unless $stylesheet;
2445                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2446                 }
2447         }
2448         if (defined $project) {
2449                 printf('<link rel="alternate" title="%s log RSS feed" '.
2450                        'href="%s" type="application/rss+xml" />'."\n",
2451                        esc_param($project), href(action=>"rss"));
2452                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2453                        'href="%s" type="application/rss+xml" />'."\n",
2454                        esc_param($project), href(action=>"rss",
2455                                                  extra_options=>"--no-merges"));
2456                 printf('<link rel="alternate" title="%s log Atom feed" '.
2457                        'href="%s" type="application/atom+xml" />'."\n",
2458                        esc_param($project), href(action=>"atom"));
2459                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2460                        'href="%s" type="application/atom+xml" />'."\n",
2461                        esc_param($project), href(action=>"atom",
2462                                                  extra_options=>"--no-merges"));
2463         } else {
2464                 printf('<link rel="alternate" title="%s projects list" '.
2465                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2466                        $site_name, href(project=>undef, action=>"project_index"));
2467                 printf('<link rel="alternate" title="%s projects feeds" '.
2468                        'href="%s" type="text/x-opml"/>'."\n",
2469                        $site_name, href(project=>undef, action=>"opml"));
2470         }
2471         if (defined $favicon) {
2472                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2473         }
2474
2475         print "</head>\n" .
2476               "<body>\n";
2477
2478         if (-f $site_header) {
2479                 open (my $fd, $site_header);
2480                 print <$fd>;
2481                 close $fd;
2482         }
2483
2484         print "<div class=\"page_header\">\n" .
2485               $cgi->a({-href => esc_url($logo_url),
2486                        -title => $logo_label},
2487                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2488         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2489         if (defined $project) {
2490                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2491                 if (defined $action) {
2492                         print " / $action";
2493                 }
2494                 print "\n";
2495         }
2496         print "</div>\n";
2497
2498         my ($have_search) = gitweb_check_feature('search');
2499         if ((defined $project) && ($have_search)) {
2500                 if (!defined $searchtext) {
2501                         $searchtext = "";
2502                 }
2503                 my $search_hash;
2504                 if (defined $hash_base) {
2505                         $search_hash = $hash_base;
2506                 } elsif (defined $hash) {
2507                         $search_hash = $hash;
2508                 } else {
2509                         $search_hash = "HEAD";
2510                 }
2511                 my $action = $my_uri;
2512                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2513                 if ($use_pathinfo) {
2514                         $action .= "/$project";
2515                 } else {
2516                         $cgi->param("p", $project);
2517                 }
2518                 $cgi->param("a", "search");
2519                 $cgi->param("h", $search_hash);
2520                 print $cgi->startform(-method => "get", -action => $action) .
2521                       "<div class=\"search\">\n" .
2522                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2523                       $cgi->hidden(-name => "a") . "\n" .
2524                       $cgi->hidden(-name => "h") . "\n" .
2525                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2526                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2527                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2528                       " search:\n",
2529                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2530                       "</div>" .
2531                       $cgi->end_form() . "\n";
2532         }
2533 }
2534
2535 sub git_footer_html {
2536         print "<div class=\"page_footer\">\n";
2537         if (defined $project) {
2538                 my $descr = git_get_project_description($project);
2539                 if (defined $descr) {
2540                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2541                 }
2542                 print $cgi->a({-href => href(action=>"rss"),
2543                               -class => "rss_logo"}, "RSS") . " ";
2544                 print $cgi->a({-href => href(action=>"atom"),
2545                               -class => "rss_logo"}, "Atom") . "\n";
2546         } else {
2547                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2548                               -class => "rss_logo"}, "OPML") . " ";
2549                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2550                               -class => "rss_logo"}, "TXT") . "\n";
2551         }
2552         print "</div>\n" ;
2553
2554         if (-f $site_footer) {
2555                 open (my $fd, $site_footer);
2556                 print <$fd>;
2557                 close $fd;
2558         }
2559
2560         print "</body>\n" .
2561               "</html>";
2562 }
2563
2564 sub die_error {
2565         my $status = shift || "403 Forbidden";
2566         my $error = shift || "Malformed query, file missing or permission denied";
2567
2568         git_header_html($status);
2569         print <<EOF;
2570 <div class="page_body">
2571 <br /><br />
2572 $status - $error
2573 <br />
2574 </div>
2575 EOF
2576         git_footer_html();
2577         exit;
2578 }
2579
2580 ## ----------------------------------------------------------------------
2581 ## functions printing or outputting HTML: navigation
2582
2583 sub git_print_page_nav {
2584         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2585         $extra = '' if !defined $extra; # pager or formats
2586
2587         my @navs = qw(summary shortlog log commit commitdiff tree);
2588         if ($suppress) {
2589                 @navs = grep { $_ ne $suppress } @navs;
2590         }
2591
2592         my %arg = map { $_ => {action=>$_} } @navs;
2593         if (defined $head) {
2594                 for (qw(commit commitdiff)) {
2595                         $arg{$_}{'hash'} = $head;
2596                 }
2597                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2598                         for (qw(shortlog log)) {
2599                                 $arg{$_}{'hash'} = $head;
2600                         }
2601                 }
2602         }
2603         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2604         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2605
2606         print "<div class=\"page_nav\">\n" .
2607                 (join " | ",
2608                  map { $_ eq $current ?
2609                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2610                  } @navs);
2611         print "<br/>\n$extra<br/>\n" .
2612               "</div>\n";
2613 }
2614
2615 sub format_paging_nav {
2616         my ($action, $hash, $head, $page, $nrevs) = @_;
2617         my $paging_nav;
2618
2619
2620         if ($hash ne $head || $page) {
2621                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2622         } else {
2623                 $paging_nav .= "HEAD";
2624         }
2625
2626         if ($page > 0) {
2627                 $paging_nav .= " &sdot; " .
2628                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2629                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2630         } else {
2631                 $paging_nav .= " &sdot; prev";
2632         }
2633
2634         if ($nrevs >= (100 * ($page+1)-1)) {
2635                 $paging_nav .= " &sdot; " .
2636                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2637                                  -accesskey => "n", -title => "Alt-n"}, "next");
2638         } else {
2639                 $paging_nav .= " &sdot; next";
2640         }
2641
2642         return $paging_nav;
2643 }
2644
2645 ## ......................................................................
2646 ## functions printing or outputting HTML: div
2647
2648 sub git_print_header_div {
2649         my ($action, $title, $hash, $hash_base) = @_;
2650         my %args = ();
2651
2652         $args{'action'} = $action;
2653         $args{'hash'} = $hash if $hash;
2654         $args{'hash_base'} = $hash_base if $hash_base;
2655
2656         print "<div class=\"header\">\n" .
2657               $cgi->a({-href => href(%args), -class => "title"},
2658               $title ? $title : $action) .
2659               "\n</div>\n";
2660 }
2661
2662 #sub git_print_authorship (\%) {
2663 sub git_print_authorship {
2664         my $co = shift;
2665
2666         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2667         print "<div class=\"author_date\">" .
2668               esc_html($co->{'author_name'}) .
2669               " [$ad{'rfc2822'}";
2670         if ($ad{'hour_local'} < 6) {
2671                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2672                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2673         } else {
2674                 printf(" (%02d:%02d %s)",
2675                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2676         }
2677         print "]</div>\n";
2678 }
2679
2680 sub git_print_page_path {
2681         my $name = shift;
2682         my $type = shift;
2683         my $hb = shift;
2684
2685
2686         print "<div class=\"page_path\">";
2687         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2688                       -title => 'tree root'}, to_utf8("[$project]"));
2689         print " / ";
2690         if (defined $name) {
2691                 my @dirname = split '/', $name;
2692                 my $basename = pop @dirname;
2693                 my $fullname = '';
2694
2695                 foreach my $dir (@dirname) {
2696                         $fullname .= ($fullname ? '/' : '') . $dir;
2697                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2698                                                      hash_base=>$hb),
2699                                       -title => $fullname}, esc_path($dir));
2700                         print " / ";
2701                 }
2702                 if (defined $type && $type eq 'blob') {
2703                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2704                                                      hash_base=>$hb),
2705                                       -title => $name}, esc_path($basename));
2706                 } elsif (defined $type && $type eq 'tree') {
2707                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2708                                                      hash_base=>$hb),
2709                                       -title => $name}, esc_path($basename));
2710                         print " / ";
2711                 } else {
2712                         print esc_path($basename);
2713                 }
2714         }
2715         print "<br/></div>\n";
2716 }
2717
2718 # sub git_print_log (\@;%) {
2719 sub git_print_log ($;%) {
2720         my $log = shift;
2721         my %opts = @_;
2722
2723         if ($opts{'-remove_title'}) {
2724                 # remove title, i.e. first line of log
2725                 shift @$log;
2726         }
2727         # remove leading empty lines
2728         while (defined $log->[0] && $log->[0] eq "") {
2729                 shift @$log;
2730         }
2731
2732         # print log
2733         my $signoff = 0;
2734         my $empty = 0;
2735         foreach my $line (@$log) {
2736                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2737                         $signoff = 1;
2738                         $empty = 0;
2739                         if (! $opts{'-remove_signoff'}) {
2740                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2741                                 next;
2742                         } else {
2743                                 # remove signoff lines
2744                                 next;
2745                         }
2746                 } else {
2747                         $signoff = 0;
2748                 }
2749
2750                 # print only one empty line
2751                 # do not print empty line after signoff
2752                 if ($line eq "") {
2753                         next if ($empty || $signoff);
2754                         $empty = 1;
2755                 } else {
2756                         $empty = 0;
2757                 }
2758
2759                 print format_log_line_html($line) . "<br/>\n";
2760         }
2761
2762         if ($opts{'-final_empty_line'}) {
2763                 # end with single empty line
2764                 print "<br/>\n" unless $empty;
2765         }
2766 }
2767
2768 # return link target (what link points to)
2769 sub git_get_link_target {
2770         my $hash = shift;
2771         my $link_target;
2772
2773         # read link
2774         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2775                 or return;
2776         {
2777                 local $/;
2778                 $link_target = <$fd>;
2779         }
2780         close $fd
2781                 or return;
2782
2783         return $link_target;
2784 }
2785
2786 # given link target, and the directory (basedir) the link is in,
2787 # return target of link relative to top directory (top tree);
2788 # return undef if it is not possible (including absolute links).
2789 sub normalize_link_target {
2790         my ($link_target, $basedir, $hash_base) = @_;
2791
2792         # we can normalize symlink target only if $hash_base is provided
2793         return unless $hash_base;
2794
2795         # absolute symlinks (beginning with '/') cannot be normalized
2796         return if (substr($link_target, 0, 1) eq '/');
2797
2798         # normalize link target to path from top (root) tree (dir)
2799         my $path;
2800         if ($basedir) {
2801                 $path = $basedir . '/' . $link_target;
2802         } else {
2803                 # we are in top (root) tree (dir)
2804                 $path = $link_target;
2805         }
2806
2807         # remove //, /./, and /../
2808         my @path_parts;
2809         foreach my $part (split('/', $path)) {
2810                 # discard '.' and ''
2811                 next if (!$part || $part eq '.');
2812                 # handle '..'
2813                 if ($part eq '..') {
2814                         if (@path_parts) {
2815                                 pop @path_parts;
2816                         } else {
2817                                 # link leads outside repository (outside top dir)
2818                                 return;
2819                         }
2820                 } else {
2821                         push @path_parts, $part;
2822                 }
2823         }
2824         $path = join('/', @path_parts);
2825
2826         return $path;
2827 }
2828
2829 # print tree entry (row of git_tree), but without encompassing <tr> element
2830 sub git_print_tree_entry {
2831         my ($t, $basedir, $hash_base, $have_blame) = @_;
2832
2833         my %base_key = ();
2834         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2835
2836         # The format of a table row is: mode list link.  Where mode is
2837         # the mode of the entry, list is the name of the entry, an href,
2838         # and link is the action links of the entry.
2839
2840         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2841         if ($t->{'type'} eq "blob") {
2842                 print "<td class=\"list\">" .
2843                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2844                                                file_name=>"$basedir$t->{'name'}", %base_key),
2845                                 -class => "list"}, esc_path($t->{'name'}));
2846                 if (S_ISLNK(oct $t->{'mode'})) {
2847                         my $link_target = git_get_link_target($t->{'hash'});
2848                         if ($link_target) {
2849                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2850                                 if (defined $norm_target) {
2851                                         print " -> " .
2852                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2853                                                                      file_name=>$norm_target),
2854                                                        -title => $norm_target}, esc_path($link_target));
2855                                 } else {
2856                                         print " -> " . esc_path($link_target);
2857                                 }
2858                         }
2859                 }
2860                 print "</td>\n";
2861                 print "<td class=\"link\">";
2862                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2863                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2864                               "blob");
2865                 if ($have_blame) {
2866                         print " | " .
2867                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2868                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2869                                       "blame");
2870                 }
2871                 if (defined $hash_base) {
2872                         print " | " .
2873                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2874                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2875                                       "history");
2876                 }
2877                 print " | " .
2878                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2879                                                file_name=>"$basedir$t->{'name'}")},
2880                                 "raw");
2881                 print "</td>\n";
2882
2883         } elsif ($t->{'type'} eq "tree") {
2884                 print "<td class=\"list\">";
2885                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2886                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2887                               esc_path($t->{'name'}));
2888                 print "</td>\n";
2889                 print "<td class=\"link\">";
2890                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2891                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2892                               "tree");
2893                 if (defined $hash_base) {
2894                         print " | " .
2895                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2896                                                      file_name=>"$basedir$t->{'name'}")},
2897                                       "history");
2898                 }
2899                 print "</td>\n";
2900         } else {
2901                 # unknown object: we can only present history for it
2902                 # (this includes 'commit' object, i.e. submodule support)
2903                 print "<td class=\"list\">" .
2904                       esc_path($t->{'name'}) .
2905                       "</td>\n";
2906                 print "<td class=\"link\">";
2907                 if (defined $hash_base) {
2908                         print $cgi->a({-href => href(action=>"history",
2909                                                      hash_base=>$hash_base,
2910                                                      file_name=>"$basedir$t->{'name'}")},
2911                                       "history");
2912                 }
2913                 print "</td>\n";
2914         }
2915 }
2916
2917 ## ......................................................................
2918 ## functions printing large fragments of HTML
2919
2920 # get pre-image filenames for merge (combined) diff
2921 sub fill_from_file_info {
2922         my ($diff, @parents) = @_;
2923
2924         $diff->{'from_file'} = [ ];
2925         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2926         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2927                 if ($diff->{'status'}[$i] eq 'R' ||
2928                     $diff->{'status'}[$i] eq 'C') {
2929                         $diff->{'from_file'}[$i] =
2930                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2931                 }
2932         }
2933
2934         return $diff;
2935 }
2936
2937 # is current raw difftree line of file deletion
2938 sub is_deleted {
2939         my $diffinfo = shift;
2940
2941         return $diffinfo->{'status_str'} =~ /D/;
2942 }
2943
2944 # does patch correspond to [previous] difftree raw line
2945 # $diffinfo  - hashref of parsed raw diff format
2946 # $patchinfo - hashref of parsed patch diff format
2947 #              (the same keys as in $diffinfo)
2948 sub is_patch_split {
2949         my ($diffinfo, $patchinfo) = @_;
2950
2951         return defined $diffinfo && defined $patchinfo
2952                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
2953 }
2954
2955
2956 sub git_difftree_body {
2957         my ($difftree, $hash, @parents) = @_;
2958         my ($parent) = $parents[0];
2959         my ($have_blame) = gitweb_check_feature('blame');
2960         print "<div class=\"list_head\">\n";
2961         if ($#{$difftree} > 10) {
2962                 print(($#{$difftree} + 1) . " files changed:\n");
2963         }
2964         print "</div>\n";
2965
2966         print "<table class=\"" .
2967               (@parents > 1 ? "combined " : "") .
2968               "diff_tree\">\n";
2969
2970         # header only for combined diff in 'commitdiff' view
2971         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
2972         if ($has_header) {
2973                 # table header
2974                 print "<thead><tr>\n" .
2975                        "<th></th><th></th>\n"; # filename, patchN link
2976                 for (my $i = 0; $i < @parents; $i++) {
2977                         my $par = $parents[$i];
2978                         print "<th>" .
2979                               $cgi->a({-href => href(action=>"commitdiff",
2980                                                      hash=>$hash, hash_parent=>$par),
2981                                        -title => 'commitdiff to parent number ' .
2982                                                   ($i+1) . ': ' . substr($par,0,7)},
2983                                       $i+1) .
2984                               "&nbsp;</th>\n";
2985                 }
2986                 print "</tr></thead>\n<tbody>\n";
2987         }
2988
2989         my $alternate = 1;
2990         my $patchno = 0;
2991         foreach my $line (@{$difftree}) {
2992                 my $diff = parsed_difftree_line($line);
2993
2994                 if ($alternate) {
2995                         print "<tr class=\"dark\">\n";
2996                 } else {
2997                         print "<tr class=\"light\">\n";
2998                 }
2999                 $alternate ^= 1;
3000
3001                 if (exists $diff->{'nparents'}) { # combined diff
3002
3003                         fill_from_file_info($diff, @parents)
3004                                 unless exists $diff->{'from_file'};
3005
3006                         if (!is_deleted($diff)) {
3007                                 # file exists in the result (child) commit
3008                                 print "<td>" .
3009                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3010                                                              file_name=>$diff->{'to_file'},
3011                                                              hash_base=>$hash),
3012                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3013                                       "</td>\n";
3014                         } else {
3015                                 print "<td>" .
3016                                       esc_path($diff->{'to_file'}) .
3017                                       "</td>\n";
3018                         }
3019
3020                         if ($action eq 'commitdiff') {
3021                                 # link to patch
3022                                 $patchno++;
3023                                 print "<td class=\"link\">" .
3024                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3025                                       " | " .
3026                                       "</td>\n";
3027                         }
3028
3029                         my $has_history = 0;
3030                         my $not_deleted = 0;
3031                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3032                                 my $hash_parent = $parents[$i];
3033                                 my $from_hash = $diff->{'from_id'}[$i];
3034                                 my $from_path = $diff->{'from_file'}[$i];
3035                                 my $status = $diff->{'status'}[$i];
3036
3037                                 $has_history ||= ($status ne 'A');
3038                                 $not_deleted ||= ($status ne 'D');
3039
3040                                 if ($status eq 'A') {
3041                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3042                                 } elsif ($status eq 'D') {
3043                                         print "<td class=\"link\">" .
3044                                               $cgi->a({-href => href(action=>"blob",
3045                                                                      hash_base=>$hash,
3046                                                                      hash=>$from_hash,
3047                                                                      file_name=>$from_path)},
3048                                                       "blob" . ($i+1)) .
3049                                               " | </td>\n";
3050                                 } else {
3051                                         if ($diff->{'to_id'} eq $from_hash) {
3052                                                 print "<td class=\"link nochange\">";
3053                                         } else {
3054                                                 print "<td class=\"link\">";
3055                                         }
3056                                         print $cgi->a({-href => href(action=>"blobdiff",
3057                                                                      hash=>$diff->{'to_id'},
3058                                                                      hash_parent=>$from_hash,
3059                                                                      hash_base=>$hash,
3060                                                                      hash_parent_base=>$hash_parent,
3061                                                                      file_name=>$diff->{'to_file'},
3062                                                                      file_parent=>$from_path)},
3063                                                       "diff" . ($i+1)) .
3064                                               " | </td>\n";
3065                                 }
3066                         }
3067
3068                         print "<td class=\"link\">";
3069                         if ($not_deleted) {
3070                                 print $cgi->a({-href => href(action=>"blob",
3071                                                              hash=>$diff->{'to_id'},
3072                                                              file_name=>$diff->{'to_file'},
3073                                                              hash_base=>$hash)},
3074                                               "blob");
3075                                 print " | " if ($has_history);
3076                         }
3077                         if ($has_history) {
3078                                 print $cgi->a({-href => href(action=>"history",
3079                                                              file_name=>$diff->{'to_file'},
3080                                                              hash_base=>$hash)},
3081                                               "history");
3082                         }
3083                         print "</td>\n";
3084
3085                         print "</tr>\n";
3086                         next; # instead of 'else' clause, to avoid extra indent
3087                 }
3088                 # else ordinary diff
3089
3090                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3091                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3092                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3093                         $to_mode_oct = oct $diff->{'to_mode'};
3094                         if (S_ISREG($to_mode_oct)) { # only for regular file
3095                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3096                         }
3097                         $to_file_type = file_type($diff->{'to_mode'});
3098                 }
3099                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3100                         $from_mode_oct = oct $diff->{'from_mode'};
3101                         if (S_ISREG($to_mode_oct)) { # only for regular file
3102                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3103                         }
3104                         $from_file_type = file_type($diff->{'from_mode'});
3105                 }
3106
3107                 if ($diff->{'status'} eq "A") { # created
3108                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3109                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3110                         $mode_chng   .= "]</span>";
3111                         print "<td>";
3112                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3113                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3114                                       -class => "list"}, esc_path($diff->{'file'}));
3115                         print "</td>\n";
3116                         print "<td>$mode_chng</td>\n";
3117                         print "<td class=\"link\">";
3118                         if ($action eq 'commitdiff') {
3119                                 # link to patch
3120                                 $patchno++;
3121                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3122                                 print " | ";
3123                         }
3124                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3125                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3126                                       "blob");
3127                         print "</td>\n";
3128
3129                 } elsif ($diff->{'status'} eq "D") { # deleted
3130                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3131                         print "<td>";
3132                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3133                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3134                                        -class => "list"}, esc_path($diff->{'file'}));
3135                         print "</td>\n";
3136                         print "<td>$mode_chng</td>\n";
3137                         print "<td class=\"link\">";
3138                         if ($action eq 'commitdiff') {
3139                                 # link to patch
3140                                 $patchno++;
3141                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3142                                 print " | ";
3143                         }
3144                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3145                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3146                                       "blob") . " | ";
3147                         if ($have_blame) {
3148                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3149                                                              file_name=>$diff->{'file'})},
3150                                               "blame") . " | ";
3151                         }
3152                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3153                                                      file_name=>$diff->{'file'})},
3154                                       "history");
3155                         print "</td>\n";
3156
3157                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3158                         my $mode_chnge = "";
3159                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3160                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3161                                 if ($from_file_type ne $to_file_type) {
3162                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3163                                 }
3164                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3165                                         if ($from_mode_str && $to_mode_str) {
3166                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3167                                         } elsif ($to_mode_str) {
3168                                                 $mode_chnge .= " mode: $to_mode_str";
3169                                         }
3170                                 }
3171                                 $mode_chnge .= "]</span>\n";
3172                         }
3173                         print "<td>";
3174                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3175                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3176                                       -class => "list"}, esc_path($diff->{'file'}));
3177                         print "</td>\n";
3178                         print "<td>$mode_chnge</td>\n";
3179                         print "<td class=\"link\">";
3180                         if ($action eq 'commitdiff') {
3181                                 # link to patch
3182                                 $patchno++;
3183                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3184                                       " | ";
3185                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3186                                 # "commit" view and modified file (not onlu mode changed)
3187                                 print $cgi->a({-href => href(action=>"blobdiff",
3188                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3189                                                              hash_base=>$hash, hash_parent_base=>$parent,
3190                                                              file_name=>$diff->{'file'})},
3191                                               "diff") .
3192                                       " | ";
3193                         }
3194                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3195                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3196                                        "blob") . " | ";
3197                         if ($have_blame) {
3198                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3199                                                              file_name=>$diff->{'file'})},
3200                                               "blame") . " | ";
3201                         }
3202                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3203                                                      file_name=>$diff->{'file'})},
3204                                       "history");
3205                         print "</td>\n";
3206
3207                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3208                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3209                         my $nstatus = $status_name{$diff->{'status'}};
3210                         my $mode_chng = "";
3211                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3212                                 # mode also for directories, so we cannot use $to_mode_str
3213                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3214                         }
3215                         print "<td>" .
3216                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3217                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3218                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3219                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3220                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3221                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3222                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3223                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3224                               "<td class=\"link\">";
3225                         if ($action eq 'commitdiff') {
3226                                 # link to patch
3227                                 $patchno++;
3228                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3229                                       " | ";
3230                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3231                                 # "commit" view and modified file (not only pure rename or copy)
3232                                 print $cgi->a({-href => href(action=>"blobdiff",
3233                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3234                                                              hash_base=>$hash, hash_parent_base=>$parent,
3235                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3236                                               "diff") .
3237                                       " | ";
3238                         }
3239                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3240                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3241                                       "blob") . " | ";
3242                         if ($have_blame) {
3243                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3244                                                              file_name=>$diff->{'to_file'})},
3245                                               "blame") . " | ";
3246                         }
3247                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3248                                                     file_name=>$diff->{'to_file'})},
3249                                       "history");
3250                         print "</td>\n";
3251
3252                 } # we should not encounter Unmerged (U) or Unknown (X) status
3253                 print "</tr>\n";
3254         }
3255         print "</tbody>" if $has_header;
3256         print "</table>\n";
3257 }
3258
3259 sub git_patchset_body {
3260         my ($fd, $difftree, $hash, @hash_parents) = @_;
3261         my ($hash_parent) = $hash_parents[0];
3262
3263         my $is_combined = (@hash_parents > 1);
3264         my $patch_idx = 0;
3265         my $patch_number = 0;
3266         my $patch_line;
3267         my $diffinfo;
3268         my $to_name;
3269         my (%from, %to);
3270
3271         print "<div class=\"patchset\">\n";
3272
3273         # skip to first patch
3274         while ($patch_line = <$fd>) {
3275                 chomp $patch_line;
3276
3277                 last if ($patch_line =~ m/^diff /);
3278         }
3279
3280  PATCH:
3281         while ($patch_line) {
3282
3283                 # parse "git diff" header line
3284                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3285                         # $1 is from_name, which we do not use
3286                         $to_name = unquote($2);
3287                         $to_name =~ s!^b/!!;
3288                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3289                         # $1 is 'cc' or 'combined', which we do not use
3290                         $to_name = unquote($2);
3291                 } else {
3292                         $to_name = undef;
3293                 }
3294
3295                 # check if current patch belong to current raw line
3296                 # and parse raw git-diff line if needed
3297                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3298                         # this is continuation of a split patch
3299                         print "<div class=\"patch cont\">\n";
3300                 } else {
3301                         # advance raw git-diff output if needed
3302                         $patch_idx++ if defined $diffinfo;
3303
3304                         # read and prepare patch information
3305                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3306
3307                         # compact combined diff output can have some patches skipped
3308                         # find which patch (using pathname of result) we are at now;
3309                         if ($is_combined) {
3310                                 while ($to_name ne $diffinfo->{'to_file'}) {
3311                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3312                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3313                                               "</div>\n";  # class="patch"
3314
3315                                         $patch_idx++;
3316                                         $patch_number++;
3317
3318                                         last if $patch_idx > $#$difftree;
3319                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3320                                 }
3321                         }
3322
3323                         # modifies %from, %to hashes
3324                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3325
3326                         # this is first patch for raw difftree line with $patch_idx index
3327                         # we index @$difftree array from 0, but number patches from 1
3328                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3329                 }
3330
3331                 # git diff header
3332                 #assert($patch_line =~ m/^diff /) if DEBUG;
3333                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3334                 $patch_number++;
3335                 # print "git diff" header
3336                 print format_git_diff_header_line($patch_line, $diffinfo,
3337                                                   \%from, \%to);
3338
3339                 # print extended diff header
3340                 print "<div class=\"diff extended_header\">\n";
3341         EXTENDED_HEADER:
3342                 while ($patch_line = <$fd>) {
3343                         chomp $patch_line;
3344
3345                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3346
3347                         print format_extended_diff_header_line($patch_line, $diffinfo,
3348                                                                \%from, \%to);
3349                 }
3350                 print "</div>\n"; # class="diff extended_header"
3351
3352                 # from-file/to-file diff header
3353                 if (! $patch_line) {
3354                         print "</div>\n"; # class="patch"
3355                         last PATCH;
3356                 }
3357                 next PATCH if ($patch_line =~ m/^diff /);
3358                 #assert($patch_line =~ m/^---/) if DEBUG;
3359
3360                 my $last_patch_line = $patch_line;
3361                 $patch_line = <$fd>;
3362                 chomp $patch_line;
3363                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3364
3365                 print format_diff_from_to_header($last_patch_line, $patch_line,
3366                                                  $diffinfo, \%from, \%to,
3367                                                  @hash_parents);
3368
3369                 # the patch itself
3370         LINE:
3371                 while ($patch_line = <$fd>) {
3372                         chomp $patch_line;
3373
3374                         next PATCH if ($patch_line =~ m/^diff /);
3375
3376                         print format_diff_line($patch_line, \%from, \%to);
3377                 }
3378
3379         } continue {
3380                 print "</div>\n"; # class="patch"
3381         }
3382
3383         # for compact combined (--cc) format, with chunk and patch simpliciaction
3384         # patchset might be empty, but there might be unprocessed raw lines
3385         for (++$patch_idx if $patch_number > 0;
3386              $patch_idx < @$difftree;
3387              ++$patch_idx) {
3388                 # read and prepare patch information
3389                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3390
3391                 # generate anchor for "patch" links in difftree / whatchanged part
3392                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3393                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3394                       "</div>\n";  # class="patch"
3395
3396                 $patch_number++;
3397         }
3398
3399         if ($patch_number == 0) {
3400                 if (@hash_parents > 1) {
3401                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3402                 } else {
3403                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3404                 }
3405         }
3406
3407         print "</div>\n"; # class="patchset"
3408 }
3409
3410 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3411
3412 sub git_project_list_body {
3413         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3414
3415         my ($check_forks) = gitweb_check_feature('forks');
3416
3417         my @projects;
3418         foreach my $pr (@$projlist) {
3419                 my (@aa) = git_get_last_activity($pr->{'path'});
3420                 unless (@aa) {
3421                         next;
3422                 }
3423                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3424                 if (!defined $pr->{'descr'}) {
3425                         my $descr = git_get_project_description($pr->{'path'}) || "";
3426                         $pr->{'descr_long'} = to_utf8($descr);
3427                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3428                 }
3429                 if (!defined $pr->{'owner'}) {
3430                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3431                 }
3432                 if ($check_forks) {
3433                         my $pname = $pr->{'path'};
3434                         if (($pname =~ s/\.git$//) &&
3435                             ($pname !~ /\/$/) &&
3436                             (-d "$projectroot/$pname")) {
3437                                 $pr->{'forks'} = "-d $projectroot/$pname";
3438                         }
3439                         else {
3440                                 $pr->{'forks'} = 0;
3441                         }
3442                 }
3443                 push @projects, $pr;
3444         }
3445
3446         $order ||= $default_projects_order;
3447         $from = 0 unless defined $from;
3448         $to = $#projects if (!defined $to || $#projects < $to);
3449
3450         print "<table class=\"project_list\">\n";
3451         unless ($no_header) {
3452                 print "<tr>\n";
3453                 if ($check_forks) {
3454                         print "<th></th>\n";
3455                 }
3456                 if ($order eq "project") {
3457                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3458                         print "<th>Project</th>\n";
3459                 } else {
3460                         print "<th>" .
3461                               $cgi->a({-href => href(project=>undef, order=>'project'),
3462                                        -class => "header"}, "Project") .
3463                               "</th>\n";
3464                 }
3465                 if ($order eq "descr") {
3466                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3467                         print "<th>Description</th>\n";
3468                 } else {
3469                         print "<th>" .
3470                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3471                                        -class => "header"}, "Description") .
3472                               "</th>\n";
3473                 }
3474                 if ($order eq "owner") {
3475                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3476                         print "<th>Owner</th>\n";
3477                 } else {
3478                         print "<th>" .
3479                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3480                                        -class => "header"}, "Owner") .
3481                               "</th>\n";
3482                 }
3483                 if ($order eq "age") {
3484                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3485                         print "<th>Last Change</th>\n";
3486                 } else {
3487                         print "<th>" .
3488                               $cgi->a({-href => href(project=>undef, order=>'age'),
3489                                        -class => "header"}, "Last Change") .
3490                               "</th>\n";
3491                 }
3492                 print "<th></th>\n" .
3493                       "</tr>\n";
3494         }
3495         my $alternate = 1;
3496         for (my $i = $from; $i <= $to; $i++) {
3497                 my $pr = $projects[$i];
3498                 if ($alternate) {
3499                         print "<tr class=\"dark\">\n";
3500                 } else {
3501                         print "<tr class=\"light\">\n";
3502                 }
3503                 $alternate ^= 1;
3504                 if ($check_forks) {
3505                         print "<td>";
3506                         if ($pr->{'forks'}) {
3507                                 print "<!-- $pr->{'forks'} -->\n";
3508                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3509                         }
3510                         print "</td>\n";
3511                 }
3512                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3513                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3514                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3515                                         -class => "list", -title => $pr->{'descr_long'}},
3516                                         esc_html($pr->{'descr'})) . "</td>\n" .
3517                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3518                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3519                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3520                       "<td class=\"link\">" .
3521                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3522                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3523                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3524                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3525                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3526                       "</td>\n" .
3527                       "</tr>\n";
3528         }
3529         if (defined $extra) {
3530                 print "<tr>\n";
3531                 if ($check_forks) {
3532                         print "<td></td>\n";
3533                 }
3534                 print "<td colspan=\"5\">$extra</td>\n" .
3535                       "</tr>\n";
3536         }
3537         print "</table>\n";
3538 }
3539
3540 sub git_shortlog_body {
3541         # uses global variable $project
3542         my ($commitlist, $from, $to, $refs, $extra) = @_;
3543
3544         $from = 0 unless defined $from;
3545         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3546
3547         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3548         my $alternate = 1;
3549         for (my $i = $from; $i <= $to; $i++) {
3550                 my %co = %{$commitlist->[$i]};
3551                 my $commit = $co{'id'};
3552                 my $ref = format_ref_marker($refs, $commit);
3553                 if ($alternate) {
3554                         print "<tr class=\"dark\">\n";
3555                 } else {
3556                         print "<tr class=\"light\">\n";
3557                 }
3558                 $alternate ^= 1;
3559                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3560                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3561                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3562                       "<td><i>" . $author . "</i></td>\n" .
3563                       "<td>";
3564                 print format_subject_html($co{'title'}, $co{'title_short'},
3565                                           href(action=>"commit", hash=>$commit), $ref);
3566                 print "</td>\n" .
3567                       "<td class=\"link\">" .
3568                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3569                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3570                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3571                 my $snapshot_links = format_snapshot_links($commit);
3572                 if (defined $snapshot_links) {
3573                         print " | " . $snapshot_links;
3574                 }
3575                 print "</td>\n" .
3576                       "</tr>\n";
3577         }
3578         if (defined $extra) {
3579                 print "<tr>\n" .
3580                       "<td colspan=\"4\">$extra</td>\n" .
3581                       "</tr>\n";
3582         }
3583         print "</table>\n";
3584 }
3585
3586 sub git_history_body {
3587         # Warning: assumes constant type (blob or tree) during history
3588         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3589
3590         $from = 0 unless defined $from;
3591         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3592
3593         print "<table class=\"history\" cellspacing=\"0\">\n";
3594         my $alternate = 1;
3595         for (my $i = $from; $i <= $to; $i++) {
3596                 my %co = %{$commitlist->[$i]};
3597                 if (!%co) {
3598                         next;
3599                 }
3600                 my $commit = $co{'id'};
3601
3602                 my $ref = format_ref_marker($refs, $commit);
3603
3604                 if ($alternate) {
3605                         print "<tr class=\"dark\">\n";
3606                 } else {
3607                         print "<tr class=\"light\">\n";
3608                 }
3609                 $alternate ^= 1;
3610         # shortlog uses      chop_str($co{'author_name'}, 10)
3611                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3612                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3613                       "<td><i>" . $author . "</i></td>\n" .
3614                       "<td>";
3615                 # originally git_history used chop_str($co{'title'}, 50)
3616                 print format_subject_html($co{'title'}, $co{'title_short'},
3617                                           href(action=>"commit", hash=>$commit), $ref);
3618                 print "</td>\n" .
3619                       "<td class=\"link\">" .
3620                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3621                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3622
3623                 if ($ftype eq 'blob') {
3624                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3625                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3626                         if (defined $blob_current && defined $blob_parent &&
3627                                         $blob_current ne $blob_parent) {
3628                                 print " | " .
3629                                         $cgi->a({-href => href(action=>"blobdiff",
3630                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3631                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3632                                                                file_name=>$file_name)},
3633                                                 "diff to current");
3634                         }
3635                 }
3636                 print "</td>\n" .
3637                       "</tr>\n";
3638         }
3639         if (defined $extra) {
3640                 print "<tr>\n" .
3641                       "<td colspan=\"4\">$extra</td>\n" .
3642                       "</tr>\n";
3643         }
3644         print "</table>\n";
3645 }
3646
3647 sub git_tags_body {
3648         # uses global variable $project
3649         my ($taglist, $from, $to, $extra) = @_;
3650         $from = 0 unless defined $from;
3651         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3652
3653         print "<table class=\"tags\" cellspacing=\"0\">\n";
3654         my $alternate = 1;
3655         for (my $i = $from; $i <= $to; $i++) {
3656                 my $entry = $taglist->[$i];
3657                 my %tag = %$entry;
3658                 my $comment = $tag{'subject'};
3659                 my $comment_short;
3660                 if (defined $comment) {
3661                         $comment_short = chop_str($comment, 30, 5);
3662                 }
3663                 if ($alternate) {
3664                         print "<tr class=\"dark\">\n";
3665                 } else {
3666                         print "<tr class=\"light\">\n";
3667                 }
3668                 $alternate ^= 1;
3669                 if (defined $tag{'age'}) {
3670                         print "<td><i>$tag{'age'}</i></td>\n";
3671                 } else {
3672                         print "<td></td>\n";
3673                 }
3674                 print "<td>" .
3675                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3676                                -class => "list name"}, esc_html($tag{'name'})) .
3677                       "</td>\n" .
3678                       "<td>";
3679                 if (defined $comment) {
3680                         print format_subject_html($comment, $comment_short,
3681                                                   href(action=>"tag", hash=>$tag{'id'}));
3682                 }
3683                 print "</td>\n" .
3684                       "<td class=\"selflink\">";
3685                 if ($tag{'type'} eq "tag") {
3686                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3687                 } else {
3688                         print "&nbsp;";
3689                 }
3690                 print "</td>\n" .
3691                       "<td class=\"link\">" . " | " .
3692                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3693                 if ($tag{'reftype'} eq "commit") {
3694                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3695                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3696                 } elsif ($tag{'reftype'} eq "blob") {
3697                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3698                 }
3699                 print "</td>\n" .
3700                       "</tr>";
3701         }
3702         if (defined $extra) {
3703                 print "<tr>\n" .
3704                       "<td colspan=\"5\">$extra</td>\n" .
3705                       "</tr>\n";
3706         }
3707         print "</table>\n";
3708 }
3709
3710 sub git_heads_body {
3711         # uses global variable $project
3712         my ($headlist, $head, $from, $to, $extra) = @_;
3713         $from = 0 unless defined $from;
3714         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3715
3716         print "<table class=\"heads\" cellspacing=\"0\">\n";
3717         my $alternate = 1;
3718         for (my $i = $from; $i <= $to; $i++) {
3719                 my $entry = $headlist->[$i];
3720                 my %ref = %$entry;
3721                 my $curr = $ref{'id'} eq $head;
3722                 if ($alternate) {
3723                         print "<tr class=\"dark\">\n";
3724                 } else {
3725                         print "<tr class=\"light\">\n";
3726                 }
3727                 $alternate ^= 1;
3728                 print "<td><i>$ref{'age'}</i></td>\n" .
3729                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3730                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3731                                -class => "list name"},esc_html($ref{'name'})) .
3732                       "</td>\n" .
3733                       "<td class=\"link\">" .
3734                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3735                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3736                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3737                       "</td>\n" .
3738                       "</tr>";
3739         }
3740         if (defined $extra) {
3741                 print "<tr>\n" .
3742                       "<td colspan=\"3\">$extra</td>\n" .
3743                       "</tr>\n";
3744         }
3745         print "</table>\n";
3746 }
3747
3748 sub git_search_grep_body {
3749         my ($commitlist, $from, $to, $extra) = @_;
3750         $from = 0 unless defined $from;
3751         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3752
3753         print "<table class=\"grep\" cellspacing=\"0\">\n";
3754         my $alternate = 1;
3755         for (my $i = $from; $i <= $to; $i++) {
3756                 my %co = %{$commitlist->[$i]};
3757                 if (!%co) {
3758                         next;
3759                 }
3760                 my $commit = $co{'id'};
3761                 if ($alternate) {
3762                         print "<tr class=\"dark\">\n";
3763                 } else {
3764                         print "<tr class=\"light\">\n";
3765                 }
3766                 $alternate ^= 1;
3767                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3768                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3769                       "<td><i>" . $author . "</i></td>\n" .
3770                       "<td>" .
3771                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3772                                chop_and_escape_str($co{'title'}, 50) . "<br/>");
3773                 my $comment = $co{'comment'};
3774                 foreach my $line (@$comment) {
3775                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3776                                 my $lead = esc_html($1) || "";
3777                                 $lead = chop_str($lead, 30, 10);
3778                                 my $match = esc_html($2) || "";
3779                                 my $trail = esc_html($3) || "";
3780                                 $trail = chop_str($trail, 30, 10);
3781                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3782                                 print chop_str($text, 80, 5) . "<br/>\n";
3783                         }
3784                 }
3785                 print "</td>\n" .
3786                       "<td class=\"link\">" .
3787                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3788                       " | " .
3789                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3790                 print "</td>\n" .
3791                       "</tr>\n";
3792         }
3793         if (defined $extra) {
3794                 print "<tr>\n" .
3795                       "<td colspan=\"3\">$extra</td>\n" .
3796                       "</tr>\n";
3797         }
3798         print "</table>\n";
3799 }
3800
3801 ## ======================================================================
3802 ## ======================================================================
3803 ## actions
3804
3805 sub git_project_list {
3806         my $order = $cgi->param('o');
3807         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3808                 die_error(undef, "Unknown order parameter");
3809         }
3810
3811         my @list = git_get_projects_list();
3812         if (!@list) {
3813                 die_error(undef, "No projects found");
3814         }
3815
3816         git_header_html();
3817         if (-f $home_text) {
3818                 print "<div class=\"index_include\">\n";
3819                 open (my $fd, $home_text);
3820                 print <$fd>;
3821                 close $fd;
3822                 print "</div>\n";
3823         }
3824         git_project_list_body(\@list, $order);
3825         git_footer_html();
3826 }
3827
3828 sub git_forks {
3829         my $order = $cgi->param('o');
3830         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3831                 die_error(undef, "Unknown order parameter");
3832         }
3833
3834         my @list = git_get_projects_list($project);
3835         if (!@list) {
3836                 die_error(undef, "No forks found");
3837         }
3838
3839         git_header_html();
3840         git_print_page_nav('','');
3841         git_print_header_div('summary', "$project forks");
3842         git_project_list_body(\@list, $order);
3843         git_footer_html();
3844 }
3845
3846 sub git_project_index {
3847         my @projects = git_get_projects_list($project);
3848
3849         print $cgi->header(
3850                 -type => 'text/plain',
3851                 -charset => 'utf-8',
3852                 -content_disposition => 'inline; filename="index.aux"');
3853
3854         foreach my $pr (@projects) {
3855                 if (!exists $pr->{'owner'}) {
3856                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3857                 }
3858
3859                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3860                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3861                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3862                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3863                 $path  =~ s/ /\+/g;
3864                 $owner =~ s/ /\+/g;
3865
3866                 print "$path $owner\n";
3867         }
3868 }
3869
3870 sub git_summary {
3871         my $descr = git_get_project_description($project) || "none";
3872         my %co = parse_commit("HEAD");
3873         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3874         my $head = $co{'id'};
3875
3876         my $owner = git_get_project_owner($project);
3877
3878         my $refs = git_get_references();
3879         # These get_*_list functions return one more to allow us to see if
3880         # there are more ...
3881         my @taglist  = git_get_tags_list(16);
3882         my @headlist = git_get_heads_list(16);
3883         my @forklist;
3884         my ($check_forks) = gitweb_check_feature('forks');
3885
3886         if ($check_forks) {
3887                 @forklist = git_get_projects_list($project);
3888         }
3889
3890         git_header_html();
3891         git_print_page_nav('summary','', $head);
3892
3893         print "<div class=\"title\">&nbsp;</div>\n";
3894         print "<table cellspacing=\"0\">\n" .
3895               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3896               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3897         if (defined $cd{'rfc2822'}) {
3898                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3899         }
3900
3901         # use per project git URL list in $projectroot/$project/cloneurl
3902         # or make project git URL from git base URL and project name
3903         my $url_tag = "URL";
3904         my @url_list = git_get_project_url_list($project);
3905         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3906         foreach my $git_url (@url_list) {
3907                 next unless $git_url;
3908                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3909                 $url_tag = "";
3910         }
3911         print "</table>\n";
3912
3913         if (-s "$projectroot/$project/README.html") {
3914                 if (open my $fd, "$projectroot/$project/README.html") {
3915                         print "<div class=\"title\">readme</div>\n";
3916                         print $_ while (<$fd>);
3917                         close $fd;
3918                 }
3919         }
3920
3921         # we need to request one more than 16 (0..15) to check if
3922         # those 16 are all
3923         my @commitlist = $head ? parse_commits($head, 17) : ();
3924         if (@commitlist) {
3925                 git_print_header_div('shortlog');
3926                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3927                                   $#commitlist <=  15 ? undef :
3928                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3929         }
3930
3931         if (@taglist) {
3932                 git_print_header_div('tags');
3933                 git_tags_body(\@taglist, 0, 15,
3934                               $#taglist <=  15 ? undef :
3935                               $cgi->a({-href => href(action=>"tags")}, "..."));
3936         }
3937
3938         if (@headlist) {
3939                 git_print_header_div('heads');
3940                 git_heads_body(\@headlist, $head, 0, 15,
3941                                $#headlist <= 15 ? undef :
3942                                $cgi->a({-href => href(action=>"heads")}, "..."));
3943         }
3944
3945         if (@forklist) {
3946                 git_print_header_div('forks');
3947                 git_project_list_body(\@forklist, undef, 0, 15,
3948                                       $#forklist <= 15 ? undef :
3949                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3950                                       'noheader');
3951         }
3952
3953         git_footer_html();
3954 }
3955
3956 sub git_tag {
3957         my $head = git_get_head_hash($project);
3958         git_header_html();
3959         git_print_page_nav('','', $head,undef,$head);
3960         my %tag = parse_tag($hash);
3961
3962         if (! %tag) {
3963                 die_error(undef, "Unknown tag object");
3964         }
3965
3966         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3967         print "<div class=\"title_text\">\n" .
3968               "<table cellspacing=\"0\">\n" .
3969               "<tr>\n" .
3970               "<td>object</td>\n" .
3971               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3972                                $tag{'object'}) . "</td>\n" .
3973               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3974                                               $tag{'type'}) . "</td>\n" .
3975               "</tr>\n";
3976         if (defined($tag{'author'})) {
3977                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3978                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3979                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3980                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3981                         "</td></tr>\n";
3982         }
3983         print "</table>\n\n" .
3984               "</div>\n";
3985         print "<div class=\"page_body\">";
3986         my $comment = $tag{'comment'};
3987         foreach my $line (@$comment) {
3988                 chomp $line;
3989                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3990         }
3991         print "</div>\n";
3992         git_footer_html();
3993 }
3994
3995 sub git_blame2 {
3996         my $fd;
3997         my $ftype;
3998
3999         my ($have_blame) = gitweb_check_feature('blame');
4000         if (!$have_blame) {
4001                 die_error('403 Permission denied', "Permission denied");
4002         }
4003         die_error('404 Not Found', "File name not defined") if (!$file_name);
4004         $hash_base ||= git_get_head_hash($project);
4005         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4006         my %co = parse_commit($hash_base)
4007                 or die_error(undef, "Reading commit failed");
4008         if (!defined $hash) {
4009                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4010                         or die_error(undef, "Error looking up file");
4011         }
4012         $ftype = git_get_type($hash);
4013         if ($ftype !~ "blob") {
4014                 die_error('400 Bad Request', "Object is not a blob");
4015         }
4016         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4017               $file_name, $hash_base)
4018                 or die_error(undef, "Open git-blame failed");
4019         git_header_html();
4020         my $formats_nav =
4021                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4022                         "blob") .
4023                 " | " .
4024                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4025                         "history") .
4026                 " | " .
4027                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4028                         "HEAD");
4029         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4030         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4031         git_print_page_path($file_name, $ftype, $hash_base);
4032         my @rev_color = (qw(light2 dark2));
4033         my $num_colors = scalar(@rev_color);
4034         my $current_color = 0;
4035         my $last_rev;
4036         print <<HTML;
4037 <div class="page_body">
4038 <table class="blame">
4039 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4040 HTML
4041         my %metainfo = ();
4042         while (1) {
4043                 $_ = <$fd>;
4044                 last unless defined $_;
4045                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4046                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4047                 if (!exists $metainfo{$full_rev}) {
4048                         $metainfo{$full_rev} = {};
4049                 }
4050                 my $meta = $metainfo{$full_rev};
4051                 while (<$fd>) {
4052                         last if (s/^\t//);
4053                         if (/^(\S+) (.*)$/) {
4054                                 $meta->{$1} = $2;
4055                         }
4056                 }
4057                 my $data = $_;
4058                 chomp $data;
4059                 my $rev = substr($full_rev, 0, 8);
4060                 my $author = $meta->{'author'};
4061                 my %date = parse_date($meta->{'author-time'},
4062                                       $meta->{'author-tz'});
4063                 my $date = $date{'iso-tz'};
4064                 if ($group_size) {
4065                         $current_color = ++$current_color % $num_colors;
4066                 }
4067                 print "<tr class=\"$rev_color[$current_color]\">\n";
4068                 if ($group_size) {
4069                         print "<td class=\"sha1\"";
4070                         print " title=\"". esc_html($author) . ", $date\"";
4071                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4072                         print ">";
4073                         print $cgi->a({-href => href(action=>"commit",
4074                                                      hash=>$full_rev,
4075                                                      file_name=>$file_name)},
4076                                       esc_html($rev));
4077                         print "</td>\n";
4078                 }
4079                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4080                         or die_error(undef, "Open git-rev-parse failed");
4081                 my $parent_commit = <$dd>;
4082                 close $dd;
4083                 chomp($parent_commit);
4084                 my $blamed = href(action => 'blame',
4085                                   file_name => $meta->{'filename'},
4086                                   hash_base => $parent_commit);
4087                 print "<td class=\"linenr\">";
4088                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4089                                 -id => "l$lineno",
4090                                 -class => "linenr" },
4091                               esc_html($lineno));
4092                 print "</td>";
4093                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4094                 print "</tr>\n";
4095         }
4096         print "</table>\n";
4097         print "</div>";
4098         close $fd
4099                 or print "Reading blob failed\n";
4100         git_footer_html();
4101 }
4102
4103 sub git_blame {
4104         my $fd;
4105
4106         my ($have_blame) = gitweb_check_feature('blame');
4107         if (!$have_blame) {
4108                 die_error('403 Permission denied', "Permission denied");
4109         }
4110         die_error('404 Not Found', "File name not defined") if (!$file_name);
4111         $hash_base ||= git_get_head_hash($project);
4112         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4113         my %co = parse_commit($hash_base)
4114                 or die_error(undef, "Reading commit failed");
4115         if (!defined $hash) {
4116                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4117                         or die_error(undef, "Error lookup file");
4118         }
4119         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4120                 or die_error(undef, "Open git-annotate failed");
4121         git_header_html();
4122         my $formats_nav =
4123                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4124                         "blob") .
4125                 " | " .
4126                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4127                         "history") .
4128                 " | " .
4129                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4130                         "HEAD");
4131         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4132         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4133         git_print_page_path($file_name, 'blob', $hash_base);
4134         print "<div class=\"page_body\">\n";
4135         print <<HTML;
4136 <table class="blame">
4137   <tr>
4138     <th>Commit</th>
4139     <th>Age</th>
4140     <th>Author</th>
4141     <th>Line</th>
4142     <th>Data</th>
4143   </tr>
4144 HTML
4145         my @line_class = (qw(light dark));
4146         my $line_class_len = scalar (@line_class);
4147         my $line_class_num = $#line_class;
4148         while (my $line = <$fd>) {
4149                 my $long_rev;
4150                 my $short_rev;
4151                 my $author;
4152                 my $time;
4153                 my $lineno;
4154                 my $data;
4155                 my $age;
4156                 my $age_str;
4157                 my $age_class;
4158
4159                 chomp $line;
4160                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4161
4162                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4163                         $long_rev = $1;
4164                         $author   = $2;
4165                         $time     = $3;
4166                         $lineno   = $4;
4167                         $data     = $5;
4168                 } else {
4169                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4170                         next;
4171                 }
4172                 $short_rev  = substr ($long_rev, 0, 8);
4173                 $age        = time () - $time;
4174                 $age_str    = age_string ($age);
4175                 $age_str    =~ s/ /&nbsp;/g;
4176                 $age_class  = age_class($age);
4177                 $author     = esc_html ($author);
4178                 $author     =~ s/ /&nbsp;/g;
4179
4180                 $data = untabify($data);
4181                 $data = esc_html ($data);
4182
4183                 print <<HTML;
4184   <tr class="$line_class[$line_class_num]">
4185     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4186     <td class="$age_class">$age_str</td>
4187     <td>$author</td>
4188     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4189     <td class="pre">$data</td>
4190   </tr>
4191 HTML
4192         } # while (my $line = <$fd>)
4193         print "</table>\n\n";
4194         close $fd
4195                 or print "Reading blob failed.\n";
4196         print "</div>";
4197         git_footer_html();
4198 }
4199
4200 sub git_tags {
4201         my $head = git_get_head_hash($project);
4202         git_header_html();
4203         git_print_page_nav('','', $head,undef,$head);
4204         git_print_header_div('summary', $project);
4205
4206         my @tagslist = git_get_tags_list();
4207         if (@tagslist) {
4208                 git_tags_body(\@tagslist);
4209         }
4210         git_footer_html();
4211 }
4212
4213 sub git_heads {
4214         my $head = git_get_head_hash($project);
4215         git_header_html();
4216         git_print_page_nav('','', $head,undef,$head);
4217         git_print_header_div('summary', $project);
4218
4219         my @headslist = git_get_heads_list();
4220         if (@headslist) {
4221                 git_heads_body(\@headslist, $head);
4222         }
4223         git_footer_html();
4224 }
4225
4226 sub git_blob_plain {
4227         my $expires;
4228
4229         if (!defined $hash) {
4230                 if (defined $file_name) {
4231                         my $base = $hash_base || git_get_head_hash($project);
4232                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4233                                 or die_error(undef, "Error lookup file");
4234                 } else {
4235                         die_error(undef, "No file name defined");
4236                 }
4237         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4238                 # blobs defined by non-textual hash id's can be cached
4239                 $expires = "+1d";
4240         }
4241
4242         my $type = shift;
4243         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4244                 or die_error(undef, "Couldn't cat $file_name, $hash");
4245
4246         $type ||= blob_mimetype($fd, $file_name);
4247
4248         # save as filename, even when no $file_name is given
4249         my $save_as = "$hash";
4250         if (defined $file_name) {
4251                 $save_as = $file_name;
4252         } elsif ($type =~ m/^text\//) {
4253                 $save_as .= '.txt';
4254         }
4255
4256         print $cgi->header(
4257                 -type => "$type",
4258                 -expires=>$expires,
4259                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4260         undef $/;
4261         binmode STDOUT, ':raw';
4262         print <$fd>;
4263         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4264         $/ = "\n";
4265         close $fd;
4266 }
4267
4268 sub git_blob {
4269         my $expires;
4270
4271         if (!defined $hash) {
4272                 if (defined $file_name) {
4273                         my $base = $hash_base || git_get_head_hash($project);
4274                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4275                                 or die_error(undef, "Error lookup file");
4276                 } else {
4277                         die_error(undef, "No file name defined");
4278                 }
4279         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4280                 # blobs defined by non-textual hash id's can be cached
4281                 $expires = "+1d";
4282         }
4283
4284         my ($have_blame) = gitweb_check_feature('blame');
4285         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4286                 or die_error(undef, "Couldn't cat $file_name, $hash");
4287         my $mimetype = blob_mimetype($fd, $file_name);
4288         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4289                 close $fd;
4290                 return git_blob_plain($mimetype);
4291         }
4292         # we can have blame only for text/* mimetype
4293         $have_blame &&= ($mimetype =~ m!^text/!);
4294
4295         git_header_html(undef, $expires);
4296         my $formats_nav = '';
4297         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4298                 if (defined $file_name) {
4299                         if ($have_blame) {
4300                                 $formats_nav .=
4301                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4302                                                 "blame") .
4303                                         " | ";
4304                         }
4305                         $formats_nav .=
4306                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4307                                         "history") .
4308                                 " | " .
4309                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4310                                         "raw") .
4311                                 " | " .
4312                                 $cgi->a({-href => href(action=>"blob",
4313                                                        hash_base=>"HEAD", file_name=>$file_name)},
4314                                         "HEAD");
4315                 } else {
4316                         $formats_nav .=
4317                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4318                                         "raw");
4319                 }
4320                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4321                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4322         } else {
4323                 print "<div class=\"page_nav\">\n" .
4324                       "<br/><br/></div>\n" .
4325                       "<div class=\"title\">$hash</div>\n";
4326         }
4327         git_print_page_path($file_name, "blob", $hash_base);
4328         print "<div class=\"page_body\">\n";
4329         if ($mimetype =~ m!^text/!) {
4330                 my $nr;
4331                 while (my $line = <$fd>) {
4332                         chomp $line;
4333                         $nr++;
4334                         $line = untabify($line);
4335                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4336                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4337                 }
4338         } elsif ($mimetype =~ m!^image/!) {
4339                 print qq!<img type="$mimetype"!;
4340                 if ($file_name) {
4341                         print qq! alt="$file_name" title="$file_name"!;
4342                 }
4343                 print qq! src="! .
4344                       href(action=>"blob_plain", hash=>$hash,
4345                            hash_base=>$hash_base, file_name=>$file_name) .
4346                       qq!" />\n!;
4347         }
4348         close $fd
4349                 or print "Reading blob failed.\n";
4350         print "</div>";
4351         git_footer_html();
4352 }
4353
4354 sub git_tree {
4355         if (!defined $hash_base) {
4356                 $hash_base = "HEAD";
4357         }
4358         if (!defined $hash) {
4359                 if (defined $file_name) {
4360                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4361                 } else {
4362                         $hash = $hash_base;
4363                 }
4364         }
4365         $/ = "\0";
4366         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4367                 or die_error(undef, "Open git-ls-tree failed");
4368         my @entries = map { chomp; $_ } <$fd>;
4369         close $fd or die_error(undef, "Reading tree failed");
4370         $/ = "\n";
4371
4372         my $refs = git_get_references();
4373         my $ref = format_ref_marker($refs, $hash_base);
4374         git_header_html();
4375         my $basedir = '';
4376         my ($have_blame) = gitweb_check_feature('blame');
4377         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4378                 my @views_nav = ();
4379                 if (defined $file_name) {
4380                         push @views_nav,
4381                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4382                                         "history"),
4383                                 $cgi->a({-href => href(action=>"tree",
4384                                                        hash_base=>"HEAD", file_name=>$file_name)},
4385                                         "HEAD"),
4386                 }
4387                 my $snapshot_links = format_snapshot_links($hash);
4388                 if (defined $snapshot_links) {
4389                         # FIXME: Should be available when we have no hash base as well.
4390                         push @views_nav, $snapshot_links;
4391                 }
4392                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4393                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4394         } else {
4395                 undef $hash_base;
4396                 print "<div class=\"page_nav\">\n";
4397                 print "<br/><br/></div>\n";
4398                 print "<div class=\"title\">$hash</div>\n";
4399         }
4400         if (defined $file_name) {
4401                 $basedir = $file_name;
4402                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4403                         $basedir .= '/';
4404                 }
4405         }
4406         git_print_page_path($file_name, 'tree', $hash_base);
4407         print "<div class=\"page_body\">\n";
4408         print "<table cellspacing=\"0\">\n";
4409         my $alternate = 1;
4410         # '..' (top directory) link if possible
4411         if (defined $hash_base &&
4412             defined $file_name && $file_name =~ m![^/]+$!) {
4413                 if ($alternate) {
4414                         print "<tr class=\"dark\">\n";
4415                 } else {
4416                         print "<tr class=\"light\">\n";
4417                 }
4418                 $alternate ^= 1;
4419
4420                 my $up = $file_name;
4421                 $up =~ s!/?[^/]+$!!;
4422                 undef $up unless $up;
4423                 # based on git_print_tree_entry
4424                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4425                 print '<td class="list">';
4426                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4427                                              file_name=>$up)},
4428                               "..");
4429                 print "</td>\n";
4430                 print "<td class=\"link\"></td>\n";
4431
4432                 print "</tr>\n";
4433         }
4434         foreach my $line (@entries) {
4435                 my %t = parse_ls_tree_line($line, -z => 1);
4436
4437                 if ($alternate) {
4438                         print "<tr class=\"dark\">\n";
4439                 } else {
4440                         print "<tr class=\"light\">\n";
4441                 }
4442                 $alternate ^= 1;
4443
4444                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4445
4446                 print "</tr>\n";
4447         }
4448         print "</table>\n" .
4449               "</div>";
4450         git_footer_html();
4451 }
4452
4453 sub git_snapshot {
4454         my @supported_fmts = gitweb_check_feature('snapshot');
4455         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4456
4457         my $format = $cgi->param('sf');
4458         if (!@supported_fmts) {
4459                 die_error('403 Permission denied', "Permission denied");
4460         }
4461         # default to first supported snapshot format
4462         $format ||= $supported_fmts[0];
4463         if ($format !~ m/^[a-z0-9]+$/) {
4464                 die_error(undef, "Invalid snapshot format parameter");
4465         } elsif (!exists($known_snapshot_formats{$format})) {
4466                 die_error(undef, "Unknown snapshot format");
4467         } elsif (!grep($_ eq $format, @supported_fmts)) {
4468                 die_error(undef, "Unsupported snapshot format");
4469         }
4470
4471         if (!defined $hash) {
4472                 $hash = git_get_head_hash($project);
4473         }
4474
4475         my $git_command = git_cmd_str();
4476         my $name = $project;
4477         $name =~ s,([^/])/*\.git$,$1,;
4478         $name = basename($name);
4479         my $filename = to_utf8($name);
4480         $name =~ s/\047/\047\\\047\047/g;
4481         my $cmd;
4482         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4483         $cmd = "$git_command archive " .
4484                 "--format=$known_snapshot_formats{$format}{'format'} " .
4485                 "--prefix=\'$name\'/ $hash";
4486         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4487                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4488         }
4489
4490         print $cgi->header(
4491                 -type => $known_snapshot_formats{$format}{'type'},
4492                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4493                 -status => '200 OK');
4494
4495         open my $fd, "-|", $cmd
4496                 or die_error(undef, "Execute git-archive failed");
4497         binmode STDOUT, ':raw';
4498         print <$fd>;
4499         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4500         close $fd;
4501 }
4502
4503 sub git_log {
4504         my $head = git_get_head_hash($project);
4505         if (!defined $hash) {
4506                 $hash = $head;
4507         }
4508         if (!defined $page) {
4509                 $page = 0;
4510         }
4511         my $refs = git_get_references();
4512
4513         my @commitlist = parse_commits($hash, 101, (100 * $page));
4514
4515         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4516
4517         git_header_html();
4518         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4519
4520         if (!@commitlist) {
4521                 my %co = parse_commit($hash);
4522
4523                 git_print_header_div('summary', $project);
4524                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4525         }
4526         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4527         for (my $i = 0; $i <= $to; $i++) {
4528                 my %co = %{$commitlist[$i]};
4529                 next if !%co;
4530                 my $commit = $co{'id'};
4531                 my $ref = format_ref_marker($refs, $commit);
4532                 my %ad = parse_date($co{'author_epoch'});
4533                 git_print_header_div('commit',
4534                                "<span class=\"age\">$co{'age_string'}</span>" .
4535                                esc_html($co{'title'}) . $ref,
4536                                $commit);
4537                 print "<div class=\"title_text\">\n" .
4538                       "<div class=\"log_link\">\n" .
4539                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4540                       " | " .
4541                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4542                       " | " .
4543                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4544                       "<br/>\n" .
4545                       "</div>\n" .
4546                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4547                       "</div>\n";
4548
4549                 print "<div class=\"log_body\">\n";
4550                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4551                 print "</div>\n";
4552         }
4553         if ($#commitlist >= 100) {
4554                 print "<div class=\"page_nav\">\n";
4555                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4556                                -accesskey => "n", -title => "Alt-n"}, "next");
4557                 print "</div>\n";
4558         }
4559         git_footer_html();
4560 }
4561
4562 sub git_commit {
4563         $hash ||= $hash_base || "HEAD";
4564         my %co = parse_commit($hash);
4565         if (!%co) {
4566                 die_error(undef, "Unknown commit object");
4567         }
4568         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4569         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4570
4571         my $parent  = $co{'parent'};
4572         my $parents = $co{'parents'}; # listref
4573
4574         # we need to prepare $formats_nav before any parameter munging
4575         my $formats_nav;
4576         if (!defined $parent) {
4577                 # --root commitdiff
4578                 $formats_nav .= '(initial)';
4579         } elsif (@$parents == 1) {
4580                 # single parent commit
4581                 $formats_nav .=
4582                         '(parent: ' .
4583                         $cgi->a({-href => href(action=>"commit",
4584                                                hash=>$parent)},
4585                                 esc_html(substr($parent, 0, 7))) .
4586                         ')';
4587         } else {
4588                 # merge commit
4589                 $formats_nav .=
4590                         '(merge: ' .
4591                         join(' ', map {
4592                                 $cgi->a({-href => href(action=>"commit",
4593                                                        hash=>$_)},
4594                                         esc_html(substr($_, 0, 7)));
4595                         } @$parents ) .
4596                         ')';
4597         }
4598
4599         if (!defined $parent) {
4600                 $parent = "--root";
4601         }
4602         my @difftree;
4603         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4604                 @diff_opts,
4605                 (@$parents <= 1 ? $parent : '-c'),
4606                 $hash, "--"
4607                 or die_error(undef, "Open git-diff-tree failed");
4608         @difftree = map { chomp; $_ } <$fd>;
4609         close $fd or die_error(undef, "Reading git-diff-tree failed");
4610
4611         # non-textual hash id's can be cached
4612         my $expires;
4613         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4614                 $expires = "+1d";
4615         }
4616         my $refs = git_get_references();
4617         my $ref = format_ref_marker($refs, $co{'id'});
4618
4619         git_header_html(undef, $expires);
4620         git_print_page_nav('commit', '',
4621                            $hash, $co{'tree'}, $hash,
4622                            $formats_nav);
4623
4624         if (defined $co{'parent'}) {
4625                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4626         } else {
4627                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4628         }
4629         print "<div class=\"title_text\">\n" .
4630               "<table cellspacing=\"0\">\n";
4631         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4632               "<tr>" .
4633               "<td></td><td> $ad{'rfc2822'}";
4634         if ($ad{'hour_local'} < 6) {
4635                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4636                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4637         } else {
4638                 printf(" (%02d:%02d %s)",
4639                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4640         }
4641         print "</td>" .
4642               "</tr>\n";
4643         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4644         print "<tr><td></td><td> $cd{'rfc2822'}" .
4645               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4646               "</td></tr>\n";
4647         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4648         print "<tr>" .
4649               "<td>tree</td>" .
4650               "<td class=\"sha1\">" .
4651               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4652                        class => "list"}, $co{'tree'}) .
4653               "</td>" .
4654               "<td class=\"link\">" .
4655               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4656                       "tree");
4657         my $snapshot_links = format_snapshot_links($hash);
4658         if (defined $snapshot_links) {
4659                 print " | " . $snapshot_links;
4660         }
4661         print "</td>" .
4662               "</tr>\n";
4663
4664         foreach my $par (@$parents) {
4665                 print "<tr>" .
4666                       "<td>parent</td>" .
4667                       "<td class=\"sha1\">" .
4668                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4669                                class => "list"}, $par) .
4670                       "</td>" .
4671                       "<td class=\"link\">" .
4672                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4673                       " | " .
4674                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4675                       "</td>" .
4676                       "</tr>\n";
4677         }
4678         print "</table>".
4679               "</div>\n";
4680
4681         print "<div class=\"page_body\">\n";
4682         git_print_log($co{'comment'});
4683         print "</div>\n";
4684
4685         git_difftree_body(\@difftree, $hash, @$parents);
4686
4687         git_footer_html();
4688 }
4689
4690 sub git_object {
4691         # object is defined by:
4692         # - hash or hash_base alone
4693         # - hash_base and file_name
4694         my $type;
4695
4696         # - hash or hash_base alone
4697         if ($hash || ($hash_base && !defined $file_name)) {
4698                 my $object_id = $hash || $hash_base;
4699
4700                 my $git_command = git_cmd_str();
4701                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4702                         or die_error('404 Not Found', "Object does not exist");
4703                 $type = <$fd>;
4704                 chomp $type;
4705                 close $fd
4706                         or die_error('404 Not Found', "Object does not exist");
4707
4708         # - hash_base and file_name
4709         } elsif ($hash_base && defined $file_name) {
4710                 $file_name =~ s,/+$,,;
4711
4712                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4713                         or die_error('404 Not Found', "Base object does not exist");
4714
4715                 # here errors should not hapen
4716                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4717                         or die_error(undef, "Open git-ls-tree failed");
4718                 my $line = <$fd>;
4719                 close $fd;
4720
4721                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4722                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4723                         die_error('404 Not Found', "File or directory for given base does not exist");
4724                 }
4725                 $type = $2;
4726                 $hash = $3;
4727         } else {
4728                 die_error('404 Not Found', "Not enough information to find object");
4729         }
4730
4731         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4732                                           hash=>$hash, hash_base=>$hash_base,
4733                                           file_name=>$file_name),
4734                              -status => '302 Found');
4735 }
4736
4737 sub git_blobdiff {
4738         my $format = shift || 'html';
4739
4740         my $fd;
4741         my @difftree;
4742         my %diffinfo;
4743         my $expires;
4744
4745         # preparing $fd and %diffinfo for git_patchset_body
4746         # new style URI
4747         if (defined $hash_base && defined $hash_parent_base) {
4748                 if (defined $file_name) {
4749                         # read raw output
4750                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4751                                 $hash_parent_base, $hash_base,
4752                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4753                                 or die_error(undef, "Open git-diff-tree failed");
4754                         @difftree = map { chomp; $_ } <$fd>;
4755                         close $fd
4756                                 or die_error(undef, "Reading git-diff-tree failed");
4757                         @difftree
4758                                 or die_error('404 Not Found', "Blob diff not found");
4759
4760                 } elsif (defined $hash &&
4761                          $hash =~ /[0-9a-fA-F]{40}/) {
4762                         # try to find filename from $hash
4763
4764                         # read filtered raw output
4765                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4766                                 $hash_parent_base, $hash_base, "--"
4767                                 or die_error(undef, "Open git-diff-tree failed");
4768                         @difftree =
4769                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4770                                 # $hash == to_id
4771                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4772                                 map { chomp; $_ } <$fd>;
4773                         close $fd
4774                                 or die_error(undef, "Reading git-diff-tree failed");
4775                         @difftree
4776                                 or die_error('404 Not Found', "Blob diff not found");
4777
4778                 } else {
4779                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4780                 }
4781
4782                 if (@difftree > 1) {
4783                         die_error('404 Not Found', "Ambiguous blob diff specification");
4784                 }
4785
4786                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4787                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4788                 $file_name   ||= $diffinfo{'to_file'};
4789
4790                 $hash_parent ||= $diffinfo{'from_id'};
4791                 $hash        ||= $diffinfo{'to_id'};
4792
4793                 # non-textual hash id's can be cached
4794                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4795                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4796                         $expires = '+1d';
4797                 }
4798
4799                 # open patch output
4800                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4801                         '-p', ($format eq 'html' ? "--full-index" : ()),
4802                         $hash_parent_base, $hash_base,
4803                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4804                         or die_error(undef, "Open git-diff-tree failed");
4805         }
4806
4807         # old/legacy style URI
4808         if (!%diffinfo && # if new style URI failed
4809             defined $hash && defined $hash_parent) {
4810                 # fake git-diff-tree raw output
4811                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4812                 $diffinfo{'from_id'} = $hash_parent;
4813                 $diffinfo{'to_id'}   = $hash;
4814                 if (defined $file_name) {
4815                         if (defined $file_parent) {
4816                                 $diffinfo{'status'} = '2';
4817                                 $diffinfo{'from_file'} = $file_parent;
4818                                 $diffinfo{'to_file'}   = $file_name;
4819                         } else { # assume not renamed
4820                                 $diffinfo{'status'} = '1';
4821                                 $diffinfo{'from_file'} = $file_name;
4822                                 $diffinfo{'to_file'}   = $file_name;
4823                         }
4824                 } else { # no filename given
4825                         $diffinfo{'status'} = '2';
4826                         $diffinfo{'from_file'} = $hash_parent;
4827                         $diffinfo{'to_file'}   = $hash;
4828                 }
4829
4830                 # non-textual hash id's can be cached
4831                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4832                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4833                         $expires = '+1d';
4834                 }
4835
4836                 # open patch output
4837                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4838                         '-p', ($format eq 'html' ? "--full-index" : ()),
4839                         $hash_parent, $hash, "--"
4840                         or die_error(undef, "Open git-diff failed");
4841         } else  {
4842                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4843                         unless %diffinfo;
4844         }
4845
4846         # header
4847         if ($format eq 'html') {
4848                 my $formats_nav =
4849                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4850                                 "raw");
4851                 git_header_html(undef, $expires);
4852                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4853                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4854                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4855                 } else {
4856                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4857                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4858                 }
4859                 if (defined $file_name) {
4860                         git_print_page_path($file_name, "blob", $hash_base);
4861                 } else {
4862                         print "<div class=\"page_path\"></div>\n";
4863                 }
4864
4865         } elsif ($format eq 'plain') {
4866                 print $cgi->header(
4867                         -type => 'text/plain',
4868                         -charset => 'utf-8',
4869                         -expires => $expires,
4870                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4871
4872                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4873
4874         } else {
4875                 die_error(undef, "Unknown blobdiff format");
4876         }
4877
4878         # patch
4879         if ($format eq 'html') {
4880                 print "<div class=\"page_body\">\n";
4881
4882                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4883                 close $fd;
4884
4885                 print "</div>\n"; # class="page_body"
4886                 git_footer_html();
4887
4888         } else {
4889                 while (my $line = <$fd>) {
4890                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4891                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4892
4893                         print $line;
4894
4895                         last if $line =~ m!^\+\+\+!;
4896                 }
4897                 local $/ = undef;
4898                 print <$fd>;
4899                 close $fd;
4900         }
4901 }
4902
4903 sub git_blobdiff_plain {
4904         git_blobdiff('plain');
4905 }
4906
4907 sub git_commitdiff {
4908         my $format = shift || 'html';
4909         $hash ||= $hash_base || "HEAD";
4910         my %co = parse_commit($hash);
4911         if (!%co) {
4912                 die_error(undef, "Unknown commit object");
4913         }
4914
4915         # choose format for commitdiff for merge
4916         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4917                 $hash_parent = '--cc';
4918         }
4919         # we need to prepare $formats_nav before almost any parameter munging
4920         my $formats_nav;
4921         if ($format eq 'html') {
4922                 $formats_nav =
4923                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4924                                 "raw");
4925
4926                 if (defined $hash_parent &&
4927                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4928                         # commitdiff with two commits given
4929                         my $hash_parent_short = $hash_parent;
4930                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4931                                 $hash_parent_short = substr($hash_parent, 0, 7);
4932                         }
4933                         $formats_nav .=
4934                                 ' (from';
4935                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4936                                 if ($co{'parents'}[$i] eq $hash_parent) {
4937                                         $formats_nav .= ' parent ' . ($i+1);
4938                                         last;
4939                                 }
4940                         }
4941                         $formats_nav .= ': ' .
4942                                 $cgi->a({-href => href(action=>"commitdiff",
4943                                                        hash=>$hash_parent)},
4944                                         esc_html($hash_parent_short)) .
4945                                 ')';
4946                 } elsif (!$co{'parent'}) {
4947                         # --root commitdiff
4948                         $formats_nav .= ' (initial)';
4949                 } elsif (scalar @{$co{'parents'}} == 1) {
4950                         # single parent commit
4951                         $formats_nav .=
4952                                 ' (parent: ' .
4953                                 $cgi->a({-href => href(action=>"commitdiff",
4954                                                        hash=>$co{'parent'})},
4955                                         esc_html(substr($co{'parent'}, 0, 7))) .
4956                                 ')';
4957                 } else {
4958                         # merge commit
4959                         if ($hash_parent eq '--cc') {
4960                                 $formats_nav .= ' | ' .
4961                                         $cgi->a({-href => href(action=>"commitdiff",
4962                                                                hash=>$hash, hash_parent=>'-c')},
4963                                                 'combined');
4964                         } else { # $hash_parent eq '-c'
4965                                 $formats_nav .= ' | ' .
4966                                         $cgi->a({-href => href(action=>"commitdiff",
4967                                                                hash=>$hash, hash_parent=>'--cc')},
4968                                                 'compact');
4969                         }
4970                         $formats_nav .=
4971                                 ' (merge: ' .
4972                                 join(' ', map {
4973                                         $cgi->a({-href => href(action=>"commitdiff",
4974                                                                hash=>$_)},
4975                                                 esc_html(substr($_, 0, 7)));
4976                                 } @{$co{'parents'}} ) .
4977                                 ')';
4978                 }
4979         }
4980
4981         my $hash_parent_param = $hash_parent;
4982         if (!defined $hash_parent_param) {
4983                 # --cc for multiple parents, --root for parentless
4984                 $hash_parent_param =
4985                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4986         }
4987
4988         # read commitdiff
4989         my $fd;
4990         my @difftree;
4991         if ($format eq 'html') {
4992                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4993                         "--no-commit-id", "--patch-with-raw", "--full-index",
4994                         $hash_parent_param, $hash, "--"
4995                         or die_error(undef, "Open git-diff-tree failed");
4996
4997                 while (my $line = <$fd>) {
4998                         chomp $line;
4999                         # empty line ends raw part of diff-tree output
5000                         last unless $line;
5001                         push @difftree, scalar parse_difftree_raw_line($line);
5002                 }
5003
5004         } elsif ($format eq 'plain') {
5005                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5006                         '-p', $hash_parent_param, $hash, "--"
5007                         or die_error(undef, "Open git-diff-tree failed");
5008
5009         } else {
5010                 die_error(undef, "Unknown commitdiff format");
5011         }
5012
5013         # non-textual hash id's can be cached
5014         my $expires;
5015         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5016                 $expires = "+1d";
5017         }
5018
5019         # write commit message
5020         if ($format eq 'html') {
5021                 my $refs = git_get_references();
5022                 my $ref = format_ref_marker($refs, $co{'id'});
5023
5024                 git_header_html(undef, $expires);
5025                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5026                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5027                 git_print_authorship(\%co);
5028                 print "<div class=\"page_body\">\n";
5029                 if (@{$co{'comment'}} > 1) {
5030                         print "<div class=\"log\">\n";
5031                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5032                         print "</div>\n"; # class="log"
5033                 }
5034
5035         } elsif ($format eq 'plain') {
5036                 my $refs = git_get_references("tags");
5037                 my $tagname = git_get_rev_name_tags($hash);
5038                 my $filename = basename($project) . "-$hash.patch";
5039
5040                 print $cgi->header(
5041                         -type => 'text/plain',
5042                         -charset => 'utf-8',
5043                         -expires => $expires,
5044                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5045                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5046                 print <<TEXT;
5047 From: $co{'author'}
5048 Date: $ad{'rfc2822'} ($ad{'tz_local'})
5049 Subject: $co{'title'}
5050 TEXT
5051                 print "X-Git-Tag: $tagname\n" if $tagname;
5052                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5053
5054                 foreach my $line (@{$co{'comment'}}) {
5055                         print "$line\n";
5056                 }
5057                 print "---\n\n";
5058         }
5059
5060         # write patch
5061         if ($format eq 'html') {
5062                 my $use_parents = !defined $hash_parent ||
5063                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5064                 git_difftree_body(\@difftree, $hash,
5065                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5066                 print "<br/>\n";
5067
5068                 git_patchset_body($fd, \@difftree, $hash,
5069                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5070                 close $fd;
5071                 print "</div>\n"; # class="page_body"
5072                 git_footer_html();
5073
5074         } elsif ($format eq 'plain') {
5075                 local $/ = undef;
5076                 print <$fd>;
5077                 close $fd
5078                         or print "Reading git-diff-tree failed\n";
5079         }
5080 }
5081
5082 sub git_commitdiff_plain {
5083         git_commitdiff('plain');
5084 }
5085
5086 sub git_history {
5087         if (!defined $hash_base) {
5088                 $hash_base = git_get_head_hash($project);
5089         }
5090         if (!defined $page) {
5091                 $page = 0;
5092         }
5093         my $ftype;
5094         my %co = parse_commit($hash_base);
5095         if (!%co) {
5096                 die_error(undef, "Unknown commit object");
5097         }
5098
5099         my $refs = git_get_references();
5100         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5101
5102         if (!defined $hash && defined $file_name) {
5103                 $hash = git_get_hash_by_path($hash_base, $file_name);
5104         }
5105         if (defined $hash) {
5106                 $ftype = git_get_type($hash);
5107         }
5108
5109         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5110
5111         my $paging_nav = '';
5112         if ($page > 0) {
5113                 $paging_nav .=
5114                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5115                                                file_name=>$file_name)},
5116                                 "first");
5117                 $paging_nav .= " &sdot; " .
5118                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5119                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5120         } else {
5121                 $paging_nav .= "first";
5122                 $paging_nav .= " &sdot; prev";
5123         }
5124         my $next_link = '';
5125         if ($#commitlist >= 100) {
5126                 $next_link =
5127                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5128                                  -accesskey => "n", -title => "Alt-n"}, "next");
5129                 $paging_nav .= " &sdot; $next_link";
5130         } else {
5131                 $paging_nav .= " &sdot; next";
5132         }
5133
5134         git_header_html();
5135         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5136         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5137         git_print_page_path($file_name, $ftype, $hash_base);
5138
5139         git_history_body(\@commitlist, 0, 99,
5140                          $refs, $hash_base, $ftype, $next_link);
5141
5142         git_footer_html();
5143 }
5144
5145 sub git_search {
5146         my ($have_search) = gitweb_check_feature('search');
5147         if (!$have_search) {
5148                 die_error('403 Permission denied', "Permission denied");
5149         }
5150         if (!defined $searchtext) {
5151                 die_error(undef, "Text field empty");
5152         }
5153         if (!defined $hash) {
5154                 $hash = git_get_head_hash($project);
5155         }
5156         my %co = parse_commit($hash);
5157         if (!%co) {
5158                 die_error(undef, "Unknown commit object");
5159         }
5160         if (!defined $page) {
5161                 $page = 0;
5162         }
5163
5164         $searchtype ||= 'commit';
5165         if ($searchtype eq 'pickaxe') {
5166                 # pickaxe may take all resources of your box and run for several minutes
5167                 # with every query - so decide by yourself how public you make this feature
5168                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5169                 if (!$have_pickaxe) {
5170                         die_error('403 Permission denied', "Permission denied");
5171                 }
5172         }
5173         if ($searchtype eq 'grep') {
5174                 my ($have_grep) = gitweb_check_feature('grep');
5175                 if (!$have_grep) {
5176                         die_error('403 Permission denied', "Permission denied");
5177                 }
5178         }
5179
5180         git_header_html();
5181
5182         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5183                 my $greptype;
5184                 if ($searchtype eq 'commit') {
5185                         $greptype = "--grep=";
5186                 } elsif ($searchtype eq 'author') {
5187                         $greptype = "--author=";
5188                 } elsif ($searchtype eq 'committer') {
5189                         $greptype = "--committer=";
5190                 }
5191                 $greptype .= $search_regexp;
5192                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5193
5194                 my $paging_nav = '';
5195                 if ($page > 0) {
5196                         $paging_nav .=
5197                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5198                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5199                                         "first");
5200                         $paging_nav .= " &sdot; " .
5201                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5202                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5203                 } else {
5204                         $paging_nav .= "first";
5205                         $paging_nav .= " &sdot; prev";
5206                 }
5207                 my $next_link = '';
5208                 if ($#commitlist >= 100) {
5209                         $next_link =
5210                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5211                                          -accesskey => "n", -title => "Alt-n"}, "next");
5212                         $paging_nav .= " &sdot; $next_link";
5213                 } else {
5214                         $paging_nav .= " &sdot; next";
5215                 }
5216
5217                 if ($#commitlist >= 100) {
5218                 }
5219
5220                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5221                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5222                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5223         }
5224
5225         if ($searchtype eq 'pickaxe') {
5226                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5227                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5228
5229                 print "<table cellspacing=\"0\">\n";
5230                 my $alternate = 1;
5231                 $/ = "\n";
5232                 my $git_command = git_cmd_str();
5233                 my $searchqtext = $searchtext;
5234                 $searchqtext =~ s/'/'\\''/;
5235                 open my $fd, "-|", "$git_command rev-list $hash | " .
5236                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5237                 undef %co;
5238                 my @files;
5239                 while (my $line = <$fd>) {
5240                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5241                                 my %set;
5242                                 $set{'file'} = $6;
5243                                 $set{'from_id'} = $3;
5244                                 $set{'to_id'} = $4;
5245                                 $set{'id'} = $set{'to_id'};
5246                                 if ($set{'id'} =~ m/0{40}/) {
5247                                         $set{'id'} = $set{'from_id'};
5248                                 }
5249                                 if ($set{'id'} =~ m/0{40}/) {
5250                                         next;
5251                                 }
5252                                 push @files, \%set;
5253                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5254                                 if (%co) {
5255                                         if ($alternate) {
5256                                                 print "<tr class=\"dark\">\n";
5257                                         } else {
5258                                                 print "<tr class=\"light\">\n";
5259                                         }
5260                                         $alternate ^= 1;
5261                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5262                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5263                                               "<td><i>" . $author . "</i></td>\n" .
5264                                               "<td>" .
5265                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5266                                                       -class => "list subject"},
5267                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5268                                         while (my $setref = shift @files) {
5269                                                 my %set = %$setref;
5270                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5271                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5272                                                               -class => "list"},
5273                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5274                                                       "<br/>\n";
5275                                         }
5276                                         print "</td>\n" .
5277                                               "<td class=\"link\">" .
5278                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5279                                               " | " .
5280                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5281                                         print "</td>\n" .
5282                                               "</tr>\n";
5283                                 }
5284                                 %co = parse_commit($1);
5285                         }
5286                 }
5287                 close $fd;
5288
5289                 print "</table>\n";
5290         }
5291
5292         if ($searchtype eq 'grep') {
5293                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5294                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5295
5296                 print "<table cellspacing=\"0\">\n";
5297                 my $alternate = 1;
5298                 my $matches = 0;
5299                 $/ = "\n";
5300                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5301                 my $lastfile = '';
5302                 while (my $line = <$fd>) {
5303                         chomp $line;
5304                         my ($file, $lno, $ltext, $binary);
5305                         last if ($matches++ > 1000);
5306                         if ($line =~ /^Binary file (.+) matches$/) {
5307                                 $file = $1;
5308                                 $binary = 1;
5309                         } else {
5310                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5311                         }
5312                         if ($file ne $lastfile) {
5313                                 $lastfile and print "</td></tr>\n";
5314                                 if ($alternate++) {
5315                                         print "<tr class=\"dark\">\n";
5316                                 } else {
5317                                         print "<tr class=\"light\">\n";
5318                                 }
5319                                 print "<td class=\"list\">".
5320                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5321                                                                file_name=>"$file"),
5322                                                 -class => "list"}, esc_path($file));
5323                                 print "</td><td>\n";
5324                                 $lastfile = $file;
5325                         }
5326                         if ($binary) {
5327                                 print "<div class=\"binary\">Binary file</div>\n";
5328                         } else {
5329                                 $ltext = untabify($ltext);
5330                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5331                                         $ltext = esc_html($1, -nbsp=>1);
5332                                         $ltext .= '<span class="match">';
5333                                         $ltext .= esc_html($2, -nbsp=>1);
5334                                         $ltext .= '</span>';
5335                                         $ltext .= esc_html($3, -nbsp=>1);
5336                                 } else {
5337                                         $ltext = esc_html($ltext, -nbsp=>1);
5338                                 }
5339                                 print "<div class=\"pre\">" .
5340                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5341                                                                file_name=>"$file").'#l'.$lno,
5342                                                 -class => "linenr"}, sprintf('%4i', $lno))
5343                                         . ' ' .  $ltext . "</div>\n";
5344                         }
5345                 }
5346                 if ($lastfile) {
5347                         print "</td></tr>\n";
5348                         if ($matches > 1000) {
5349                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5350                         }
5351                 } else {
5352                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5353                 }
5354                 close $fd;
5355
5356                 print "</table>\n";
5357         }
5358         git_footer_html();
5359 }
5360
5361 sub git_search_help {
5362         git_header_html();
5363         git_print_page_nav('','', $hash,$hash,$hash);
5364         print <<EOT;
5365 <dl>
5366 <dt><b>commit</b></dt>
5367 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5368 EOT
5369         my ($have_grep) = gitweb_check_feature('grep');
5370         if ($have_grep) {
5371                 print <<EOT;
5372 <dt><b>grep</b></dt>
5373 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5374     a different one) are searched for the given
5375 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5376 (POSIX extended) and the matches are listed. On large
5377 trees, this search can take a while and put some strain on the server, so please use it with
5378 some consideration.</dd>
5379 EOT
5380         }
5381         print <<EOT;
5382 <dt><b>author</b></dt>
5383 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5384 <dt><b>committer</b></dt>
5385 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5386 EOT
5387         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5388         if ($have_pickaxe) {
5389                 print <<EOT;
5390 <dt><b>pickaxe</b></dt>
5391 <dd>All commits that caused the string to appear or disappear from any file (changes that
5392 added, removed or "modified" the string) will be listed. This search can take a while and
5393 takes a lot of strain on the server, so please use it wisely.</dd>
5394 EOT
5395         }
5396         print "</dl>\n";
5397         git_footer_html();
5398 }
5399
5400 sub git_shortlog {
5401         my $head = git_get_head_hash($project);
5402         if (!defined $hash) {
5403                 $hash = $head;
5404         }
5405         if (!defined $page) {
5406                 $page = 0;
5407         }
5408         my $refs = git_get_references();
5409
5410         my @commitlist = parse_commits($hash, 101, (100 * $page));
5411
5412         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5413         my $next_link = '';
5414         if ($#commitlist >= 100) {
5415                 $next_link =
5416                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5417                                  -accesskey => "n", -title => "Alt-n"}, "next");
5418         }
5419
5420         git_header_html();
5421         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5422         git_print_header_div('summary', $project);
5423
5424         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5425
5426         git_footer_html();
5427 }
5428
5429 ## ......................................................................
5430 ## feeds (RSS, Atom; OPML)
5431
5432 sub git_feed {
5433         my $format = shift || 'atom';
5434         my ($have_blame) = gitweb_check_feature('blame');
5435
5436         # Atom: http://www.atomenabled.org/developers/syndication/
5437         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5438         if ($format ne 'rss' && $format ne 'atom') {
5439                 die_error(undef, "Unknown web feed format");
5440         }
5441
5442         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5443         my $head = $hash || 'HEAD';
5444         my @commitlist = parse_commits($head, 150, 0, undef, $file_name);
5445
5446         my %latest_commit;
5447         my %latest_date;
5448         my $content_type = "application/$format+xml";
5449         if (defined $cgi->http('HTTP_ACCEPT') &&
5450                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5451                 # browser (feed reader) prefers text/xml
5452                 $content_type = 'text/xml';
5453         }
5454         if (defined($commitlist[0])) {
5455                 %latest_commit = %{$commitlist[0]};
5456                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5457                 print $cgi->header(
5458                         -type => $content_type,
5459                         -charset => 'utf-8',
5460                         -last_modified => $latest_date{'rfc2822'});
5461         } else {
5462                 print $cgi->header(
5463                         -type => $content_type,
5464                         -charset => 'utf-8');
5465         }
5466
5467         # Optimization: skip generating the body if client asks only
5468         # for Last-Modified date.
5469         return if ($cgi->request_method() eq 'HEAD');
5470
5471         # header variables
5472         my $title = "$site_name - $project/$action";
5473         my $feed_type = 'log';
5474         if (defined $hash) {
5475                 $title .= " - '$hash'";
5476                 $feed_type = 'branch log';
5477                 if (defined $file_name) {
5478                         $title .= " :: $file_name";
5479                         $feed_type = 'history';
5480                 }
5481         } elsif (defined $file_name) {
5482                 $title .= " - $file_name";
5483                 $feed_type = 'history';
5484         }
5485         $title .= " $feed_type";
5486         my $descr = git_get_project_description($project);
5487         if (defined $descr) {
5488                 $descr = esc_html($descr);
5489         } else {
5490                 $descr = "$project " .
5491                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5492                          " feed";
5493         }
5494         my $owner = git_get_project_owner($project);
5495         $owner = esc_html($owner);
5496
5497         #header
5498         my $alt_url;
5499         if (defined $file_name) {
5500                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5501         } elsif (defined $hash) {
5502                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5503         } else {
5504                 $alt_url = href(-full=>1, action=>"summary");
5505         }
5506         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5507         if ($format eq 'rss') {
5508                 print <<XML;
5509 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5510 <channel>
5511 XML
5512                 print "<title>$title</title>\n" .
5513                       "<link>$alt_url</link>\n" .
5514                       "<description>$descr</description>\n" .
5515                       "<language>en</language>\n";
5516         } elsif ($format eq 'atom') {
5517                 print <<XML;
5518 <feed xmlns="http://www.w3.org/2005/Atom">
5519 XML
5520                 print "<title>$title</title>\n" .
5521                       "<subtitle>$descr</subtitle>\n" .
5522                       '<link rel="alternate" type="text/html" href="' .
5523                       $alt_url . '" />' . "\n" .
5524                       '<link rel="self" type="' . $content_type . '" href="' .
5525                       $cgi->self_url() . '" />' . "\n" .
5526                       "<id>" . href(-full=>1) . "</id>\n" .
5527                       # use project owner for feed author
5528                       "<author><name>$owner</name></author>\n";
5529                 if (defined $favicon) {
5530                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5531                 }
5532                 if (defined $logo_url) {
5533                         # not twice as wide as tall: 72 x 27 pixels
5534                         print "<logo>" . esc_url($logo) . "</logo>\n";
5535                 }
5536                 if (! %latest_date) {
5537                         # dummy date to keep the feed valid until commits trickle in:
5538                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5539                 } else {
5540                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5541                 }
5542         }
5543
5544         # contents
5545         for (my $i = 0; $i <= $#commitlist; $i++) {
5546                 my %co = %{$commitlist[$i]};
5547                 my $commit = $co{'id'};
5548                 # we read 150, we always show 30 and the ones more recent than 48 hours
5549                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5550                         last;
5551                 }
5552                 my %cd = parse_date($co{'author_epoch'});
5553
5554                 # get list of changed files
5555                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5556                         $co{'parent'} || "--root",
5557                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5558                         or next;
5559                 my @difftree = map { chomp; $_ } <$fd>;
5560                 close $fd
5561                         or next;
5562
5563                 # print element (entry, item)
5564                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5565                 if ($format eq 'rss') {
5566                         print "<item>\n" .
5567                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5568                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5569                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5570                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5571                               "<link>$co_url</link>\n" .
5572                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5573                               "<content:encoded>" .
5574                               "<![CDATA[\n";
5575                 } elsif ($format eq 'atom') {
5576                         print "<entry>\n" .
5577                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5578                               "<updated>$cd{'iso-8601'}</updated>\n" .
5579                               "<author>\n" .
5580                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5581                         if ($co{'author_email'}) {
5582                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5583                         }
5584                         print "</author>\n" .
5585                               # use committer for contributor
5586                               "<contributor>\n" .
5587                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5588                         if ($co{'committer_email'}) {
5589                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5590                         }
5591                         print "</contributor>\n" .
5592                               "<published>$cd{'iso-8601'}</published>\n" .
5593                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5594                               "<id>$co_url</id>\n" .
5595                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5596                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5597                 }
5598                 my $comment = $co{'comment'};
5599                 print "<pre>\n";
5600                 foreach my $line (@$comment) {
5601                         $line = esc_html($line);
5602                         print "$line\n";
5603                 }
5604                 print "</pre><ul>\n";
5605                 foreach my $difftree_line (@difftree) {
5606                         my %difftree = parse_difftree_raw_line($difftree_line);
5607                         next if !$difftree{'from_id'};
5608
5609                         my $file = $difftree{'file'} || $difftree{'to_file'};
5610
5611                         print "<li>" .
5612                               "[" .
5613                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5614                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5615                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5616                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5617                                       -title => "diff"}, 'D');
5618                         if ($have_blame) {
5619                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5620                                                              file_name=>$file, hash_base=>$commit),
5621                                               -title => "blame"}, 'B');
5622                         }
5623                         # if this is not a feed of a file history
5624                         if (!defined $file_name || $file_name ne $file) {
5625                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5626                                                              file_name=>$file, hash=>$commit),
5627                                               -title => "history"}, 'H');
5628                         }
5629                         $file = esc_path($file);
5630                         print "] ".
5631                               "$file</li>\n";
5632                 }
5633                 if ($format eq 'rss') {
5634                         print "</ul>]]>\n" .
5635                               "</content:encoded>\n" .
5636                               "</item>\n";
5637                 } elsif ($format eq 'atom') {
5638                         print "</ul>\n</div>\n" .
5639                               "</content>\n" .
5640                               "</entry>\n";
5641                 }
5642         }
5643
5644         # end of feed
5645         if ($format eq 'rss') {
5646                 print "</channel>\n</rss>\n";
5647         }       elsif ($format eq 'atom') {
5648                 print "</feed>\n";
5649         }
5650 }
5651
5652 sub git_rss {
5653         git_feed('rss');
5654 }
5655
5656 sub git_atom {
5657         git_feed('atom');
5658 }
5659
5660 sub git_opml {
5661         my @list = git_get_projects_list();
5662
5663         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5664         print <<XML;
5665 <?xml version="1.0" encoding="utf-8"?>
5666 <opml version="1.0">
5667 <head>
5668   <title>$site_name OPML Export</title>
5669 </head>
5670 <body>
5671 <outline text="git RSS feeds">
5672 XML
5673
5674         foreach my $pr (@list) {
5675                 my %proj = %$pr;
5676                 my $head = git_get_head_hash($proj{'path'});
5677                 if (!defined $head) {
5678                         next;
5679                 }
5680                 $git_dir = "$projectroot/$proj{'path'}";
5681                 my %co = parse_commit($head);
5682                 if (!%co) {
5683                         next;
5684                 }
5685
5686                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5687                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5688                 my $html = "$my_url?p=$proj{'path'};a=summary";
5689                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5690         }
5691         print <<XML;
5692 </outline>
5693 </body>
5694 </opml>
5695 XML
5696 }