Lady’s Gitweb - Gitweb/blob - 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
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 374
 375 # version of the core git binary
 376 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 377
 378 $projects_list ||= $projectroot;
 379
 380 # ======================================================================
 381 # input validation and dispatch
 382 our $action = $cgi->param('a');
 383 if (defined $action) {
 384         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 385                 die_error(undef, "Invalid action parameter");
 386         }
 387 }
 388
 389 # parameters which are pathnames
 390 our $project = $cgi->param('p');
 391 if (defined $project) {
 392         if (!validate_pathname($project) ||
 393             !(-d "$projectroot/$project") ||
 394             !check_head_link("$projectroot/$project") ||
 395             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 396             ($strict_export && !project_in_list($project))) {
 397                 undef $project;
 398                 die_error(undef, "No such project");
 399         }
 400 }
 401
 402 our $file_name = $cgi->param('f');
 403 if (defined $file_name) {
 404         if (!validate_pathname($file_name)) {
 405                 die_error(undef, "Invalid file parameter");
 406         }
 407 }
 408
 409 our $file_parent = $cgi->param('fp');
 410 if (defined $file_parent) {
 411         if (!validate_pathname($file_parent)) {
 412                 die_error(undef, "Invalid file parent parameter");
 413         }
 414 }
 415
 416 # parameters which are refnames
 417 our $hash = $cgi->param('h');
 418 if (defined $hash) {
 419         if (!validate_refname($hash)) {
 420                 die_error(undef, "Invalid hash parameter");
 421         }
 422 }
 423
 424 our $hash_parent = $cgi->param('hp');
 425 if (defined $hash_parent) {
 426         if (!validate_refname($hash_parent)) {
 427                 die_error(undef, "Invalid hash parent parameter");
 428         }
 429 }
 430
 431 our $hash_base = $cgi->param('hb');
 432 if (defined $hash_base) {
 433         if (!validate_refname($hash_base)) {
 434                 die_error(undef, "Invalid hash base parameter");
 435         }
 436 }
 437
 438 my %allowed_options = (
 439         "--no-merges" => [ qw(rss atom log shortlog history) ],
 440 );
 441
 442 our @extra_options = $cgi->param('opt');
 443 if (defined @extra_options) {
 444         foreach my $opt (@extra_options) {
 445                 if (not exists $allowed_options{$opt}) {
 446                         die_error(undef, "Invalid option parameter");
 447                 }
 448                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 449                         die_error(undef, "Invalid option parameter for this action");
 450                 }
 451         }
 452 }
 453
 454 our $hash_parent_base = $cgi->param('hpb');
 455 if (defined $hash_parent_base) {
 456         if (!validate_refname($hash_parent_base)) {
 457                 die_error(undef, "Invalid hash parent base parameter");
 458         }
 459 }
 460
 461 # other parameters
 462 our $page = $cgi->param('pg');
 463 if (defined $page) {
 464         if ($page =~ m/[^0-9]/) {
 465                 die_error(undef, "Invalid page parameter");
 466         }
 467 }
 468
 469 our $searchtype = $cgi->param('st');
 470 if (defined $searchtype) {
 471         if ($searchtype =~ m/[^a-z]/) {
 472                 die_error(undef, "Invalid searchtype parameter");
 473         }
 474 }
 475
 476 our $searchtext = $cgi->param('s');
 477 our $search_regexp;
 478 if (defined $searchtext) {
 479         if (length($searchtext) < 2) {
 480                 die_error(undef, "At least two characters are required for search parameter");
 481         }
 482         $search_regexp = quotemeta $searchtext;
 483 }
 484
 485 # now read PATH_INFO and use it as alternative to parameters
 486 sub evaluate_path_info {
 487         return if defined $project;
 488         my $path_info = $ENV{"PATH_INFO"};
 489         return if !$path_info;
 490         $path_info =~ s,^/+,,;
 491         return if !$path_info;
 492         # find which part of PATH_INFO is project
 493         $project = $path_info;
 494         $project =~ s,/+$,,;
 495         while ($project && !check_head_link("$projectroot/$project")) {
 496                 $project =~ s,/*[^/]*$,,;
 497         }
 498         # validate project
 499         $project = validate_pathname($project);
 500         if (!$project ||
 501             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 502             ($strict_export && !project_in_list($project))) {
 503                 undef $project;
 504                 return;
 505         }
 506         # do not change any parameters if an action is given using the query string
 507         return if $action;
 508         $path_info =~ s,^$project/*,,;
 509         my ($refname, $pathname) = split(/:/, $path_info, 2);
 510         if (defined $pathname) {
 511                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 512                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 513                 $pathname =~ s,^/+,,;
 514                 if (!$pathname || substr($pathname, -1) eq "/") {
 515                         $action  ||= "tree";
 516                         $pathname =~ s,/$,,;
 517                 } else {
 518                         $action  ||= "blob_plain";
 519                 }
 520                 $hash_base ||= validate_refname($refname);
 521                 $file_name ||= validate_pathname($pathname);
 522         } elsif (defined $refname) {
 523                 # we got "project.git/branch"
 524                 $action ||= "shortlog";
 525                 $hash   ||= validate_refname($refname);
 526         }
 527 }
 528 evaluate_path_info();
 529
 530 # path to the current git repository
 531 our $git_dir;
 532 $git_dir = "$projectroot/$project" if $project;
 533
 534 # dispatch
 535 my %actions = (
 536         "blame" => \&git_blame2,
 537         "blobdiff" => \&git_blobdiff,
 538         "blobdiff_plain" => \&git_blobdiff_plain,
 539         "blob" => \&git_blob,
 540         "blob_plain" => \&git_blob_plain,
 541         "commitdiff" => \&git_commitdiff,
 542         "commitdiff_plain" => \&git_commitdiff_plain,
 543         "commit" => \&git_commit,
 544         "forks" => \&git_forks,
 545         "heads" => \&git_heads,
 546         "history" => \&git_history,
 547         "log" => \&git_log,
 548         "rss" => \&git_rss,
 549         "atom" => \&git_atom,
 550         "search" => \&git_search,
 551         "search_help" => \&git_search_help,
 552         "shortlog" => \&git_shortlog,
 553         "summary" => \&git_summary,
 554         "tag" => \&git_tag,
 555         "tags" => \&git_tags,
 556         "tree" => \&git_tree,
 557         "snapshot" => \&git_snapshot,
 558         "object" => \&git_object,
 559         # those below don't need $project
 560         "opml" => \&git_opml,
 561         "project_list" => \&git_project_list,
 562         "project_index" => \&git_project_index,
 563 );
 564
 565 if (!defined $action) {
 566         if (defined $hash) {
 567                 $action = git_get_type($hash);
 568         } elsif (defined $hash_base && defined $file_name) {
 569                 $action = git_get_type("$hash_base:$file_name");
 570         } elsif (defined $project) {
 571                 $action = 'summary';
 572         } else {
 573                 $action = 'project_list';
 574         }
 575 }
 576 if (!defined($actions{$action})) {
 577         die_error(undef, "Unknown action");
 578 }
 579 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 580     !$project) {
 581         die_error(undef, "Project needed");
 582 }
 583 $actions{$action}->();
 584 exit;
 585
 586 ## ======================================================================
 587 ## action links
 588
 589 sub href(%) {
 590         my %params = @_;
 591         # default is to use -absolute url() i.e. $my_uri
 592         my $href = $params{-full} ? $my_url : $my_uri;
 593
 594         # XXX: Warning: If you touch this, check the search form for updating,
 595         # too.
 596
 597         my @mapping = (
 598                 project => "p",
 599                 action => "a",
 600                 file_name => "f",
 601                 file_parent => "fp",
 602                 hash => "h",
 603                 hash_parent => "hp",
 604                 hash_base => "hb",
 605                 hash_parent_base => "hpb",
 606                 page => "pg",
 607                 order => "o",
 608                 searchtext => "s",
 609                 searchtype => "st",
 610                 snapshot_format => "sf",
 611                 extra_options => "opt",
 612         );
 613         my %mapping = @mapping;
 614
 615         $params{'project'} = $project unless exists $params{'project'};
 616
 617         if ($params{-replay}) {
 618                 while (my ($name, $symbol) = each %mapping) {
 619                         if (!exists $params{$name}) {
 620                                 # to allow for multivalued params we use arrayref form
 621                                 $params{$name} = [ $cgi->param($symbol) ];
 622                         }
 623                 }
 624         }
 625
 626         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 627         if ($use_pathinfo) {
 628                 # use PATH_INFO for project name
 629                 $href .= "/$params{'project'}" if defined $params{'project'};
 630                 delete $params{'project'};
 631
 632                 # Summary just uses the project path URL
 633                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 634                         delete $params{'action'};
 635                 }
 636         }
 637
 638         # now encode the parameters explicitly
 639         my @result = ();
 640         for (my $i = 0; $i < @mapping; $i += 2) {
 641                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 642                 if (defined $params{$name}) {
 643                         if (ref($params{$name}) eq "ARRAY") {
 644                                 foreach my $par (@{$params{$name}}) {
 645                                         push @result, $symbol . "=" . esc_param($par);
 646                                 }
 647                         } else {
 648                                 push @result, $symbol . "=" . esc_param($params{$name});
 649                         }
 650                 }
 651         }
 652         $href .= "?" . join(';', @result) if scalar @result;
 653
 654         return $href;
 655 }
 656
 657
 658 ## ======================================================================
 659 ## validation, quoting/unquoting and escaping
 660
 661 sub validate_pathname {
 662         my $input = shift || return undef;
 663
 664         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 665         # at the beginning, at the end, and between slashes.
 666         # also this catches doubled slashes
 667         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 668                 return undef;
 669         }
 670         # no null characters
 671         if ($input =~ m!\0!) {
 672                 return undef;
 673         }
 674         return $input;
 675 }
 676
 677 sub validate_refname {
 678         my $input = shift || return undef;
 679
 680         # textual hashes are O.K.
 681         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 682                 return $input;
 683         }
 684         # it must be correct pathname
 685         $input = validate_pathname($input)
 686                 or return undef;
 687         # restrictions on ref name according to git-check-ref-format
 688         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 689                 return undef;
 690         }
 691         return $input;
 692 }
 693
 694 # decode sequences of octets in utf8 into Perl's internal form,
 695 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 696 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 697 sub to_utf8 {
 698         my $str = shift;
 699         if (utf8::valid($str)) {
 700                 utf8::decode($str);
 701                 return $str;
 702         } else {
 703                 return decode($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 %opts = @_;
 758         my %es = ( # character escape codes, aka escape sequences
 759                 "\t" => '\t',   # tab            (HT)
 760                 "\n" => '\n',   # line feed      (LF)
 761                 "\r" => '\r',   # carrige return (CR)
 762                 "\f" => '\f',   # form feed      (FF)
 763                 "\b" => '\b',   # backspace      (BS)
 764                 "\a" => '\a',   # alarm (bell)   (BEL)
 765                 "\e" => '\e',   # escape         (ESC)
 766                 "\013" => '\v', # vertical tab   (VT)
 767                 "\000" => '\0', # nul character  (NUL)
 768         );
 769         my $chr = ( (exists $es{$cntrl})
 770                     ? $es{$cntrl}
 771                     : sprintf('\%03o', ord($cntrl)) );
 772         if ($opts{-nohtml}) {
 773                 return $chr;
 774         } else {
 775                 return "<span class=\"cntrl\">$chr</span>";
 776         }
 777 }
 778
 779 # Alternatively use unicode control pictures codepoints,
 780 # Unicode "printable representation" (PR)
 781 sub quot_upr {
 782         my $cntrl = shift;
 783         my %opts = @_;
 784
 785         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 786         if ($opts{-nohtml}) {
 787                 return $chr;
 788         } else {
 789                 return "<span class=\"cntrl\">$chr</span>";
 790         }
 791 }
 792
 793 # git may return quoted and escaped filenames
 794 sub unquote {
 795         my $str = shift;
 796
 797         sub unq {
 798                 my $seq = shift;
 799                 my %es = ( # character escape codes, aka escape sequences
 800                         't' => "\t",   # tab            (HT, TAB)
 801                         'n' => "\n",   # newline        (NL)
 802                         'r' => "\r",   # return         (CR)
 803                         'f' => "\f",   # form feed      (FF)
 804                         'b' => "\b",   # backspace      (BS)
 805                         'a' => "\a",   # alarm (bell)   (BEL)
 806                         'e' => "\e",   # escape         (ESC)
 807                         'v' => "\013", # vertical tab   (VT)
 808                 );
 809
 810                 if ($seq =~ m/^[0-7]{1,3}$/) {
 811                         # octal char sequence
 812                         return chr(oct($seq));
 813                 } elsif (exists $es{$seq}) {
 814                         # C escape sequence, aka character escape code
 815                         return $es{$seq};
 816                 }
 817                 # quoted ordinary character
 818                 return $seq;
 819         }
 820
 821         if ($str =~ m/^"(.*)"$/) {
 822                 # needs unquoting
 823                 $str = $1;
 824                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 825         }
 826         return $str;
 827 }
 828
 829 # escape tabs (convert tabs to spaces)
 830 sub untabify {
 831         my $line = shift;
 832
 833         while ((my $pos = index($line, "\t")) != -1) {
 834                 if (my $count = (8 - ($pos % 8))) {
 835                         my $spaces = ' ' x $count;
 836                         $line =~ s/\t/$spaces/;
 837                 }
 838         }
 839
 840         return $line;
 841 }
 842
 843 sub project_in_list {
 844         my $project = shift;
 845         my @list = git_get_projects_list();
 846         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 847 }
 848
 849 ## ----------------------------------------------------------------------
 850 ## HTML aware string manipulation
 851
 852 # Try to chop given string on a word boundary between position
 853 # $len and $len+$add_len. If there is no word boundary there,
 854 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 855 # (marking chopped part) would be longer than given string.
 856 sub chop_str {
 857         my $str = shift;
 858         my $len = shift;
 859         my $add_len = shift || 10;
 860         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 861
 862         # allow only $len chars, but don't cut a word if it would fit in $add_len
 863         # if it doesn't fit, cut it if it's still longer than the dots we would add
 864         # remove chopped character entities entirely
 865
 866         # when chopping in the middle, distribute $len into left and right part
 867         # return early if chopping wouldn't make string shorter
 868         if ($where eq 'center') {
 869                 return $str if ($len + 5 >= length($str)); # filler is length 5
 870                 $len = int($len/2);
 871         } else {
 872                 return $str if ($len + 4 >= length($str)); # filler is length 4
 873         }
 874
 875         # regexps: ending and beginning with word part up to $add_len
 876         my $endre = qr/.{$len}\w{0,$add_len}/;
 877         my $begre = qr/\w{0,$add_len}.{$len}/;
 878
 879         if ($where eq 'left') {
 880                 $str =~ m/^(.*?)($begre)$/;
 881                 my ($lead, $body) = ($1, $2);
 882                 if (length($lead) > 4) {
 883                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 884                         $lead = " ...";
 885                 }
 886                 return "$lead$body";
 887
 888         } elsif ($where eq 'center') {
 889                 $str =~ m/^($endre)(.*)$/;
 890                 my ($left, $str)  = ($1, $2);
 891                 $str =~ m/^(.*?)($begre)$/;
 892                 my ($mid, $right) = ($1, $2);
 893                 if (length($mid) > 5) {
 894                         $left  =~ s/&[^;]*$//;
 895                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 896                         $mid = " ... ";
 897                 }
 898                 return "$left$mid$right";
 899
 900         } else {
 901                 $str =~ m/^($endre)(.*)$/;
 902                 my $body = $1;
 903                 my $tail = $2;
 904                 if (length($tail) > 4) {
 905                         $body =~ s/&[^;]*$//;
 906                         $tail = "... ";
 907                 }
 908                 return "$body$tail";
 909         }
 910 }
 911
 912 # takes the same arguments as chop_str, but also wraps a <span> around the
 913 # result with a title attribute if it does get chopped. Additionally, the
 914 # string is HTML-escaped.
 915 sub chop_and_escape_str {
 916         my ($str) = @_;
 917
 918         my $chopped = chop_str(@_);
 919         if ($chopped eq $str) {
 920                 return esc_html($chopped);
 921         } else {
 922                 $str =~ s/([[:cntrl:]])/?/g;
 923                 return $cgi->span({-title=>$str}, esc_html($chopped));
 924         }
 925 }
 926
 927 ## ----------------------------------------------------------------------
 928 ## functions returning short strings
 929
 930 # CSS class for given age value (in seconds)
 931 sub age_class {
 932         my $age = shift;
 933
 934         if (!defined $age) {
 935                 return "noage";
 936         } elsif ($age < 60*60*2) {
 937                 return "age0";
 938         } elsif ($age < 60*60*24*2) {
 939                 return "age1";
 940         } else {
 941                 return "age2";
 942         }
 943 }
 944
 945 # convert age in seconds to "nn units ago" string
 946 sub age_string {
 947         my $age = shift;
 948         my $age_str;
 949
 950         if ($age > 60*60*24*365*2) {
 951                 $age_str = (int $age/60/60/24/365);
 952                 $age_str .= " years ago";
 953         } elsif ($age > 60*60*24*(365/12)*2) {
 954                 $age_str = int $age/60/60/24/(365/12);
 955                 $age_str .= " months ago";
 956         } elsif ($age > 60*60*24*7*2) {
 957                 $age_str = int $age/60/60/24/7;
 958                 $age_str .= " weeks ago";
 959         } elsif ($age > 60*60*24*2) {
 960                 $age_str = int $age/60/60/24;
 961                 $age_str .= " days ago";
 962         } elsif ($age > 60*60*2) {
 963                 $age_str = int $age/60/60;
 964                 $age_str .= " hours ago";
 965         } elsif ($age > 60*2) {
 966                 $age_str = int $age/60;
 967                 $age_str .= " min ago";
 968         } elsif ($age > 2) {
 969                 $age_str = int $age;
 970                 $age_str .= " sec ago";
 971         } else {
 972                 $age_str .= " right now";
 973         }
 974         return $age_str;
 975 }
 976
 977 use constant {
 978         S_IFINVALID => 0030000,
 979         S_IFGITLINK => 0160000,
 980 };
 981
 982 # submodule/subproject, a commit object reference
 983 sub S_ISGITLINK($) {
 984         my $mode = shift;
 985
 986         return (($mode & S_IFMT) == S_IFGITLINK)
 987 }
 988
 989 # convert file mode in octal to symbolic file mode string
 990 sub mode_str {
 991         my $mode = oct shift;
 992
 993         if (S_ISGITLINK($mode)) {
 994                 return 'm---------';
 995         } elsif (S_ISDIR($mode & S_IFMT)) {
 996                 return 'drwxr-xr-x';
 997         } elsif (S_ISLNK($mode)) {
 998                 return 'lrwxrwxrwx';
 999         } elsif (S_ISREG($mode)) {
1000                 # git cares only about the executable bit
1001                 if ($mode & S_IXUSR) {
1002                         return '-rwxr-xr-x';
1003                 } else {
1004                         return '-rw-r--r--';
1005                 };
1006         } else {
1007                 return '----------';
1008         }
1009 }
1010
1011 # convert file mode in octal to file type string
1012 sub file_type {
1013         my $mode = shift;
1014
1015         if ($mode !~ m/^[0-7]+$/) {
1016                 return $mode;
1017         } else {
1018                 $mode = oct $mode;
1019         }
1020
1021         if (S_ISGITLINK($mode)) {
1022                 return "submodule";
1023         } elsif (S_ISDIR($mode & S_IFMT)) {
1024                 return "directory";
1025         } elsif (S_ISLNK($mode)) {
1026                 return "symlink";
1027         } elsif (S_ISREG($mode)) {
1028                 return "file";
1029         } else {
1030                 return "unknown";
1031         }
1032 }
1033
1034 # convert file mode in octal to file type description string
1035 sub file_type_long {
1036         my $mode = shift;
1037
1038         if ($mode !~ m/^[0-7]+$/) {
1039                 return $mode;
1040         } else {
1041                 $mode = oct $mode;
1042         }
1043
1044         if (S_ISGITLINK($mode)) {
1045                 return "submodule";
1046         } elsif (S_ISDIR($mode & S_IFMT)) {
1047                 return "directory";
1048         } elsif (S_ISLNK($mode)) {
1049                 return "symlink";
1050         } elsif (S_ISREG($mode)) {
1051                 if ($mode & S_IXUSR) {
1052                         return "executable";
1053                 } else {
1054                         return "file";
1055                 };
1056         } else {
1057                 return "unknown";
1058         }
1059 }
1060
1061
1062 ## ----------------------------------------------------------------------
1063 ## functions returning short HTML fragments, or transforming HTML fragments
1064 ## which don't belong to other sections
1065
1066 # format line of commit message.
1067 sub format_log_line_html {
1068         my $line = shift;
1069
1070         $line = esc_html($line, -nbsp=>1);
1071         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1072                 my $hash_text = $1;
1073                 my $link =
1074                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1075                                 -class => "text"}, $hash_text);
1076                 $line =~ s/$hash_text/$link/;
1077         }
1078         return $line;
1079 }
1080
1081 # format marker of refs pointing to given object
1082 sub format_ref_marker {
1083         my ($refs, $id) = @_;
1084         my $markers = '';
1085
1086         if (defined $refs->{$id}) {
1087                 foreach my $ref (@{$refs->{$id}}) {
1088                         my ($type, $name) = qw();
1089                         # e.g. tags/v2.6.11 or heads/next
1090                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1091                                 $type = $1;
1092                                 $name = $2;
1093                         } else {
1094                                 $type = "ref";
1095                                 $name = $ref;
1096                         }
1097
1098                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1099                                     esc_html($name) . "</span>";
1100                 }
1101         }
1102
1103         if ($markers) {
1104                 return ' <span class="refs">'. $markers . '</span>';
1105         } else {
1106                 return "";
1107         }
1108 }
1109
1110 # format, perhaps shortened and with markers, title line
1111 sub format_subject_html {
1112         my ($long, $short, $href, $extra) = @_;
1113         $extra = '' unless defined($extra);
1114
1115         if (length($short) < length($long)) {
1116                 return $cgi->a({-href => $href, -class => "list subject",
1117                                 -title => to_utf8($long)},
1118                        esc_html($short) . $extra);
1119         } else {
1120                 return $cgi->a({-href => $href, -class => "list subject"},
1121                        esc_html($long)  . $extra);
1122         }
1123 }
1124
1125 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1126 sub format_git_diff_header_line {
1127         my $line = shift;
1128         my $diffinfo = shift;
1129         my ($from, $to) = @_;
1130
1131         if ($diffinfo->{'nparents'}) {
1132                 # combined diff
1133                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1134                 if ($to->{'href'}) {
1135                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1136                                          esc_path($to->{'file'}));
1137                 } else { # file was deleted (no href)
1138                         $line .= esc_path($to->{'file'});
1139                 }
1140         } else {
1141                 # "ordinary" diff
1142                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1143                 if ($from->{'href'}) {
1144                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1145                                          'a/' . esc_path($from->{'file'}));
1146                 } else { # file was added (no href)
1147                         $line .= 'a/' . esc_path($from->{'file'});
1148                 }
1149                 $line .= ' ';
1150                 if ($to->{'href'}) {
1151                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1152                                          'b/' . esc_path($to->{'file'}));
1153                 } else { # file was deleted
1154                         $line .= 'b/' . esc_path($to->{'file'});
1155                 }
1156         }
1157
1158         return "<div class=\"diff header\">$line</div>\n";
1159 }
1160
1161 # format extended diff header line, before patch itself
1162 sub format_extended_diff_header_line {
1163         my $line = shift;
1164         my $diffinfo = shift;
1165         my ($from, $to) = @_;
1166
1167         # match <path>
1168         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1169                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1170                                        esc_path($from->{'file'}));
1171         }
1172         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1173                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1174                                  esc_path($to->{'file'}));
1175         }
1176         # match single <mode>
1177         if ($line =~ m/\s(\d{6})$/) {
1178                 $line .= '<span class="info"> (' .
1179                          file_type_long($1) .
1180                          ')</span>';
1181         }
1182         # match <hash>
1183         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1184                 # can match only for combined diff
1185                 $line = 'index ';
1186                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1187                         if ($from->{'href'}[$i]) {
1188                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1189                                                   -class=>"hash"},
1190                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1191                         } else {
1192                                 $line .= '0' x 7;
1193                         }
1194                         # separator
1195                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1196                 }
1197                 $line .= '..';
1198                 if ($to->{'href'}) {
1199                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1200                                          substr($diffinfo->{'to_id'},0,7));
1201                 } else {
1202                         $line .= '0' x 7;
1203                 }
1204
1205         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1206                 # can match only for ordinary diff
1207                 my ($from_link, $to_link);
1208                 if ($from->{'href'}) {
1209                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1210                                              substr($diffinfo->{'from_id'},0,7));
1211                 } else {
1212                         $from_link = '0' x 7;
1213                 }
1214                 if ($to->{'href'}) {
1215                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1216                                            substr($diffinfo->{'to_id'},0,7));
1217                 } else {
1218                         $to_link = '0' x 7;
1219                 }
1220                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1221                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1222         }
1223
1224         return $line . "<br/>\n";
1225 }
1226
1227 # format from-file/to-file diff header
1228 sub format_diff_from_to_header {
1229         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1230         my $line;
1231         my $result = '';
1232
1233         $line = $from_line;
1234         #assert($line =~ m/^---/) if DEBUG;
1235         # no extra formatting for "^--- /dev/null"
1236         if (! $diffinfo->{'nparents'}) {
1237                 # ordinary (single parent) diff
1238                 if ($line =~ m!^--- "?a/!) {
1239                         if ($from->{'href'}) {
1240                                 $line = '--- a/' .
1241                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1242                                                 esc_path($from->{'file'}));
1243                         } else {
1244                                 $line = '--- a/' .
1245                                         esc_path($from->{'file'});
1246                         }
1247                 }
1248                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1249
1250         } else {
1251                 # combined diff (merge commit)
1252                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1253                         if ($from->{'href'}[$i]) {
1254                                 $line = '--- ' .
1255                                         $cgi->a({-href=>href(action=>"blobdiff",
1256                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1257                                                              hash_parent_base=>$parents[$i],
1258                                                              file_parent=>$from->{'file'}[$i],
1259                                                              hash=>$diffinfo->{'to_id'},
1260                                                              hash_base=>$hash,
1261                                                              file_name=>$to->{'file'}),
1262                                                  -class=>"path",
1263                                                  -title=>"diff" . ($i+1)},
1264                                                 $i+1) .
1265                                         '/' .
1266                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1267                                                 esc_path($from->{'file'}[$i]));
1268                         } else {
1269                                 $line = '--- /dev/null';
1270                         }
1271                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1272                 }
1273         }
1274
1275         $line = $to_line;
1276         #assert($line =~ m/^\+\+\+/) if DEBUG;
1277         # no extra formatting for "^+++ /dev/null"
1278         if ($line =~ m!^\+\+\+ "?b/!) {
1279                 if ($to->{'href'}) {
1280                         $line = '+++ b/' .
1281                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1282                                         esc_path($to->{'file'}));
1283                 } else {
1284                         $line = '+++ b/' .
1285                                 esc_path($to->{'file'});
1286                 }
1287         }
1288         $result .= qq!<div class="diff to_file">$line</div>\n!;
1289
1290         return $result;
1291 }
1292
1293 # create note for patch simplified by combined diff
1294 sub format_diff_cc_simplified {
1295         my ($diffinfo, @parents) = @_;
1296         my $result = '';
1297
1298         $result .= "<div class=\"diff header\">" .
1299                    "diff --cc ";
1300         if (!is_deleted($diffinfo)) {
1301                 $result .= $cgi->a({-href => href(action=>"blob",
1302                                                   hash_base=>$hash,
1303                                                   hash=>$diffinfo->{'to_id'},
1304                                                   file_name=>$diffinfo->{'to_file'}),
1305                                     -class => "path"},
1306                                    esc_path($diffinfo->{'to_file'}));
1307         } else {
1308                 $result .= esc_path($diffinfo->{'to_file'});
1309         }
1310         $result .= "</div>\n" . # class="diff header"
1311                    "<div class=\"diff nodifferences\">" .
1312                    "Simple merge" .
1313                    "</div>\n"; # class="diff nodifferences"
1314
1315         return $result;
1316 }
1317
1318 # format patch (diff) line (not to be used for diff headers)
1319 sub format_diff_line {
1320         my $line = shift;
1321         my ($from, $to) = @_;
1322         my $diff_class = "";
1323
1324         chomp $line;
1325
1326         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1327                 # combined diff
1328                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1329                 if ($line =~ m/^\@{3}/) {
1330                         $diff_class = " chunk_header";
1331                 } elsif ($line =~ m/^\\/) {
1332                         $diff_class = " incomplete";
1333                 } elsif ($prefix =~ tr/+/+/) {
1334                         $diff_class = " add";
1335                 } elsif ($prefix =~ tr/-/-/) {
1336                         $diff_class = " rem";
1337                 }
1338         } else {
1339                 # assume ordinary diff
1340                 my $char = substr($line, 0, 1);
1341                 if ($char eq '+') {
1342                         $diff_class = " add";
1343                 } elsif ($char eq '-') {
1344                         $diff_class = " rem";
1345                 } elsif ($char eq '@') {
1346                         $diff_class = " chunk_header";
1347                 } elsif ($char eq "\\") {
1348                         $diff_class = " incomplete";
1349                 }
1350         }
1351         $line = untabify($line);
1352         if ($from && $to && $line =~ m/^\@{2} /) {
1353                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1354                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1355
1356                 $from_lines = 0 unless defined $from_lines;
1357                 $to_lines   = 0 unless defined $to_lines;
1358
1359                 if ($from->{'href'}) {
1360                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1361                                              -class=>"list"}, $from_text);
1362                 }
1363                 if ($to->{'href'}) {
1364                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1365                                              -class=>"list"}, $to_text);
1366                 }
1367                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1368                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1369                 return "<div class=\"diff$diff_class\">$line</div>\n";
1370         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1371                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1372                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1373
1374                 @from_text = split(' ', $ranges);
1375                 for (my $i = 0; $i < @from_text; ++$i) {
1376                         ($from_start[$i], $from_nlines[$i]) =
1377                                 (split(',', substr($from_text[$i], 1)), 0);
1378                 }
1379
1380                 $to_text   = pop @from_text;
1381                 $to_start  = pop @from_start;
1382                 $to_nlines = pop @from_nlines;
1383
1384                 $line = "<span class=\"chunk_info\">$prefix ";
1385                 for (my $i = 0; $i < @from_text; ++$i) {
1386                         if ($from->{'href'}[$i]) {
1387                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1388                                                   -class=>"list"}, $from_text[$i]);
1389                         } else {
1390                                 $line .= $from_text[$i];
1391                         }
1392                         $line .= " ";
1393                 }
1394                 if ($to->{'href'}) {
1395                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1396                                           -class=>"list"}, $to_text);
1397                 } else {
1398                         $line .= $to_text;
1399                 }
1400                 $line .= " $prefix</span>" .
1401                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1402                 return "<div class=\"diff$diff_class\">$line</div>\n";
1403         }
1404         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1405 }
1406
1407 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1408 # linked.  Pass the hash of the tree/commit to snapshot.
1409 sub format_snapshot_links {
1410         my ($hash) = @_;
1411         my @snapshot_fmts = gitweb_check_feature('snapshot');
1412         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1413         my $num_fmts = @snapshot_fmts;
1414         if ($num_fmts > 1) {
1415                 # A parenthesized list of links bearing format names.
1416                 # e.g. "snapshot (_tar.gz_ _zip_)"
1417                 return "snapshot (" . join(' ', map
1418                         $cgi->a({
1419                                 -href => href(
1420                                         action=>"snapshot",
1421                                         hash=>$hash,
1422                                         snapshot_format=>$_
1423                                 )
1424                         }, $known_snapshot_formats{$_}{'display'})
1425                 , @snapshot_fmts) . ")";
1426         } elsif ($num_fmts == 1) {
1427                 # A single "snapshot" link whose tooltip bears the format name.
1428                 # i.e. "_snapshot_"
1429                 my ($fmt) = @snapshot_fmts;
1430                 return
1431                         $cgi->a({
1432                                 -href => href(
1433                                         action=>"snapshot",
1434                                         hash=>$hash,
1435                                         snapshot_format=>$fmt
1436                                 ),
1437                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1438                         }, "snapshot");
1439         } else { # $num_fmts == 0
1440                 return undef;
1441         }
1442 }
1443
1444 ## ----------------------------------------------------------------------
1445 ## git utility subroutines, invoking git commands
1446
1447 # returns path to the core git executable and the --git-dir parameter as list
1448 sub git_cmd {
1449         return $GIT, '--git-dir='.$git_dir;
1450 }
1451
1452 # returns path to the core git executable and the --git-dir parameter as string
1453 sub git_cmd_str {
1454         return join(' ', git_cmd());
1455 }
1456
1457 # get HEAD ref of given project as hash
1458 sub git_get_head_hash {
1459         my $project = shift;
1460         my $o_git_dir = $git_dir;
1461         my $retval = undef;
1462         $git_dir = "$projectroot/$project";
1463         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1464                 my $head = <$fd>;
1465                 close $fd;
1466                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1467                         $retval = $1;
1468                 }
1469         }
1470         if (defined $o_git_dir) {
1471                 $git_dir = $o_git_dir;
1472         }
1473         return $retval;
1474 }
1475
1476 # get type of given object
1477 sub git_get_type {
1478         my $hash = shift;
1479
1480         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1481         my $type = <$fd>;
1482         close $fd or return;
1483         chomp $type;
1484         return $type;
1485 }
1486
1487 # repository configuration
1488 our $config_file = '';
1489 our %config;
1490
1491 # store multiple values for single key as anonymous array reference
1492 # single values stored directly in the hash, not as [ <value> ]
1493 sub hash_set_multi {
1494         my ($hash, $key, $value) = @_;
1495
1496         if (!exists $hash->{$key}) {
1497                 $hash->{$key} = $value;
1498         } elsif (!ref $hash->{$key}) {
1499                 $hash->{$key} = [ $hash->{$key}, $value ];
1500         } else {
1501                 push @{$hash->{$key}}, $value;
1502         }
1503 }
1504
1505 # return hash of git project configuration
1506 # optionally limited to some section, e.g. 'gitweb'
1507 sub git_parse_project_config {
1508         my $section_regexp = shift;
1509         my %config;
1510
1511         local $/ = "\0";
1512
1513         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1514                 or return;
1515
1516         while (my $keyval = <$fh>) {
1517                 chomp $keyval;
1518                 my ($key, $value) = split(/\n/, $keyval, 2);
1519
1520                 hash_set_multi(\%config, $key, $value)
1521                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1522         }
1523         close $fh;
1524
1525         return %config;
1526 }
1527
1528 # convert config value to boolean, 'true' or 'false'
1529 # no value, number > 0, 'true' and 'yes' values are true
1530 # rest of values are treated as false (never as error)
1531 sub config_to_bool {
1532         my $val = shift;
1533
1534         # strip leading and trailing whitespace
1535         $val =~ s/^\s+//;
1536         $val =~ s/\s+$//;
1537
1538         return (!defined $val ||               # section.key
1539                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1540                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1541 }
1542
1543 # convert config value to simple decimal number
1544 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1545 # to be multiplied by 1024, 1048576, or 1073741824
1546 sub config_to_int {
1547         my $val = shift;
1548
1549         # strip leading and trailing whitespace
1550         $val =~ s/^\s+//;
1551         $val =~ s/\s+$//;
1552
1553         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1554                 $unit = lc($unit);
1555                 # unknown unit is treated as 1
1556                 return $num * ($unit eq 'g' ? 1073741824 :
1557                                $unit eq 'm' ?    1048576 :
1558                                $unit eq 'k' ?       1024 : 1);
1559         }
1560         return $val;
1561 }
1562
1563 # convert config value to array reference, if needed
1564 sub config_to_multi {
1565         my $val = shift;
1566
1567         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1568 }
1569
1570 sub git_get_project_config {
1571         my ($key, $type) = @_;
1572
1573         # key sanity check
1574         return unless ($key);
1575         $key =~ s/^gitweb\.//;
1576         return if ($key =~ m/\W/);
1577
1578         # type sanity check
1579         if (defined $type) {
1580                 $type =~ s/^--//;
1581                 $type = undef
1582                         unless ($type eq 'bool' || $type eq 'int');
1583         }
1584
1585         # get config
1586         if (!defined $config_file ||
1587             $config_file ne "$git_dir/config") {
1588                 %config = git_parse_project_config('gitweb');
1589                 $config_file = "$git_dir/config";
1590         }
1591
1592         # ensure given type
1593         if (!defined $type) {
1594                 return $config{"gitweb.$key"};
1595         } elsif ($type eq 'bool') {
1596                 # backward compatibility: 'git config --bool' returns true/false
1597                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1598         } elsif ($type eq 'int') {
1599                 return config_to_int($config{"gitweb.$key"});
1600         }
1601         return $config{"gitweb.$key"};
1602 }
1603
1604 # get hash of given path at given ref
1605 sub git_get_hash_by_path {
1606         my $base = shift;
1607         my $path = shift || return undef;
1608         my $type = shift;
1609
1610         $path =~ s,/+$,,;
1611
1612         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1613                 or die_error(undef, "Open git-ls-tree failed");
1614         my $line = <$fd>;
1615         close $fd or return undef;
1616
1617         if (!defined $line) {
1618                 # there is no tree or hash given by $path at $base
1619                 return undef;
1620         }
1621
1622         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1623         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1624         if (defined $type && $type ne $2) {
1625                 # type doesn't match
1626                 return undef;
1627         }
1628         return $3;
1629 }
1630
1631 # get path of entry with given hash at given tree-ish (ref)
1632 # used to get 'from' filename for combined diff (merge commit) for renames
1633 sub git_get_path_by_hash {
1634         my $base = shift || return;
1635         my $hash = shift || return;
1636
1637         local $/ = "\0";
1638
1639         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1640                 or return undef;
1641         while (my $line = <$fd>) {
1642                 chomp $line;
1643
1644                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1645                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1646                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1647                         close $fd;
1648                         return $1;
1649                 }
1650         }
1651         close $fd;
1652         return undef;
1653 }
1654
1655 ## ......................................................................
1656 ## git utility functions, directly accessing git repository
1657
1658 sub git_get_project_description {
1659         my $path = shift;
1660
1661         $git_dir = "$projectroot/$path";
1662         open my $fd, "$git_dir/description"
1663                 or return git_get_project_config('description');
1664         my $descr = <$fd>;
1665         close $fd;
1666         if (defined $descr) {
1667                 chomp $descr;
1668         }
1669         return $descr;
1670 }
1671
1672 sub git_get_project_url_list {
1673         my $path = shift;
1674
1675         $git_dir = "$projectroot/$path";
1676         open my $fd, "$git_dir/cloneurl"
1677                 or return wantarray ?
1678                 @{ config_to_multi(git_get_project_config('url')) } :
1679                    config_to_multi(git_get_project_config('url'));
1680         my @git_project_url_list = map { chomp; $_ } <$fd>;
1681         close $fd;
1682
1683         return wantarray ? @git_project_url_list : \@git_project_url_list;
1684 }
1685
1686 sub git_get_projects_list {
1687         my ($filter) = @_;
1688         my @list;
1689
1690         $filter ||= '';
1691         $filter =~ s/\.git$//;
1692
1693         my ($check_forks) = gitweb_check_feature('forks');
1694
1695         if (-d $projects_list) {
1696                 # search in directory
1697                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1698                 # remove the trailing "/"
1699                 $dir =~ s!/+$!!;
1700                 my $pfxlen = length("$dir");
1701                 my $pfxdepth = ($dir =~ tr!/!!);
1702
1703                 File::Find::find({
1704                         follow_fast => 1, # follow symbolic links
1705                         follow_skip => 2, # ignore duplicates
1706                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1707                         wanted => sub {
1708                                 # skip project-list toplevel, if we get it.
1709                                 return if (m!^[/.]$!);
1710                                 # only directories can be git repositories
1711                                 return unless (-d $_);
1712                                 # don't traverse too deep (Find is super slow on os x)
1713                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1714                                         $File::Find::prune = 1;
1715                                         return;
1716                                 }
1717
1718                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1719                                 # we check related file in $projectroot
1720                                 if ($check_forks and $subdir =~ m#/.#) {
1721                                         $File::Find::prune = 1;
1722                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1723                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1724                                         $File::Find::prune = 1;
1725                                 }
1726                         },
1727                 }, "$dir");
1728
1729         } elsif (-f $projects_list) {
1730                 # read from file(url-encoded):
1731                 # 'git%2Fgit.git Linus+Torvalds'
1732                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1733                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1734                 my %paths;
1735                 open my ($fd), $projects_list or return;
1736         PROJECT:
1737                 while (my $line = <$fd>) {
1738                         chomp $line;
1739                         my ($path, $owner) = split ' ', $line;
1740                         $path = unescape($path);
1741                         $owner = unescape($owner);
1742                         if (!defined $path) {
1743                                 next;
1744                         }
1745                         if ($filter ne '') {
1746                                 # looking for forks;
1747                                 my $pfx = substr($path, 0, length($filter));
1748                                 if ($pfx ne $filter) {
1749                                         next PROJECT;
1750                                 }
1751                                 my $sfx = substr($path, length($filter));
1752                                 if ($sfx !~ /^\/.*\.git$/) {
1753                                         next PROJECT;
1754                                 }
1755                         } elsif ($check_forks) {
1756                         PATH:
1757                                 foreach my $filter (keys %paths) {
1758                                         # looking for forks;
1759                                         my $pfx = substr($path, 0, length($filter));
1760                                         if ($pfx ne $filter) {
1761                                                 next PATH;
1762                                         }
1763                                         my $sfx = substr($path, length($filter));
1764                                         if ($sfx !~ /^\/.*\.git$/) {
1765                                                 next PATH;
1766                                         }
1767                                         # is a fork, don't include it in
1768                                         # the list
1769                                         next PROJECT;
1770                                 }
1771                         }
1772                         if (check_export_ok("$projectroot/$path")) {
1773                                 my $pr = {
1774                                         path => $path,
1775                                         owner => to_utf8($owner),
1776                                 };
1777                                 push @list, $pr;
1778                                 (my $forks_path = $path) =~ s/\.git$//;
1779                                 $paths{$forks_path}++;
1780                         }
1781                 }
1782                 close $fd;
1783         }
1784         return @list;
1785 }
1786
1787 our $gitweb_project_owner = undef;
1788 sub git_get_project_list_from_file {
1789
1790         return if (defined $gitweb_project_owner);
1791
1792         $gitweb_project_owner = {};
1793         # read from file (url-encoded):
1794         # 'git%2Fgit.git Linus+Torvalds'
1795         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1796         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1797         if (-f $projects_list) {
1798                 open (my $fd , $projects_list);
1799                 while (my $line = <$fd>) {
1800                         chomp $line;
1801                         my ($pr, $ow) = split ' ', $line;
1802                         $pr = unescape($pr);
1803                         $ow = unescape($ow);
1804                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1805                 }
1806                 close $fd;
1807         }
1808 }
1809
1810 sub git_get_project_owner {
1811         my $project = shift;
1812         my $owner;
1813
1814         return undef unless $project;
1815         $git_dir = "$projectroot/$project";
1816
1817         if (!defined $gitweb_project_owner) {
1818                 git_get_project_list_from_file();
1819         }
1820
1821         if (exists $gitweb_project_owner->{$project}) {
1822                 $owner = $gitweb_project_owner->{$project};
1823         }
1824         if (!defined $owner){
1825                 $owner = git_get_project_config('owner');
1826         }
1827         if (!defined $owner) {
1828                 $owner = get_file_owner("$git_dir");
1829         }
1830
1831         return $owner;
1832 }
1833
1834 sub git_get_last_activity {
1835         my ($path) = @_;
1836         my $fd;
1837
1838         $git_dir = "$projectroot/$path";
1839         open($fd, "-|", git_cmd(), 'for-each-ref',
1840              '--format=%(committer)',
1841              '--sort=-committerdate',
1842              '--count=1',
1843              'refs/heads') or return;
1844         my $most_recent = <$fd>;
1845         close $fd or return;
1846         if (defined $most_recent &&
1847             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1848                 my $timestamp = $1;
1849                 my $age = time - $timestamp;
1850                 return ($age, age_string($age));
1851         }
1852         return (undef, undef);
1853 }
1854
1855 sub git_get_references {
1856         my $type = shift || "";
1857         my %refs;
1858         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1859         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1860         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1861                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1862                 or return;
1863
1864         while (my $line = <$fd>) {
1865                 chomp $line;
1866                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1867                         if (defined $refs{$1}) {
1868                                 push @{$refs{$1}}, $2;
1869                         } else {
1870                                 $refs{$1} = [ $2 ];
1871                         }
1872                 }
1873         }
1874         close $fd or return;
1875         return \%refs;
1876 }
1877
1878 sub git_get_rev_name_tags {
1879         my $hash = shift || return undef;
1880
1881         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1882                 or return;
1883         my $name_rev = <$fd>;
1884         close $fd;
1885
1886         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1887                 return $1;
1888         } else {
1889                 # catches also '$hash undefined' output
1890                 return undef;
1891         }
1892 }
1893
1894 ## ----------------------------------------------------------------------
1895 ## parse to hash functions
1896
1897 sub parse_date {
1898         my $epoch = shift;
1899         my $tz = shift || "-0000";
1900
1901         my %date;
1902         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1903         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1904         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1905         $date{'hour'} = $hour;
1906         $date{'minute'} = $min;
1907         $date{'mday'} = $mday;
1908         $date{'day'} = $days[$wday];
1909         $date{'month'} = $months[$mon];
1910         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1911                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1912         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1913                              $mday, $months[$mon], $hour ,$min;
1914         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1915                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1916
1917         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1918         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1919         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1920         $date{'hour_local'} = $hour;
1921         $date{'minute_local'} = $min;
1922         $date{'tz_local'} = $tz;
1923         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1924                                   1900+$year, $mon+1, $mday,
1925                                   $hour, $min, $sec, $tz);
1926         return %date;
1927 }
1928
1929 sub parse_tag {
1930         my $tag_id = shift;
1931         my %tag;
1932         my @comment;
1933
1934         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1935         $tag{'id'} = $tag_id;
1936         while (my $line = <$fd>) {
1937                 chomp $line;
1938                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1939                         $tag{'object'} = $1;
1940                 } elsif ($line =~ m/^type (.+)$/) {
1941                         $tag{'type'} = $1;
1942                 } elsif ($line =~ m/^tag (.+)$/) {
1943                         $tag{'name'} = $1;
1944                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1945                         $tag{'author'} = $1;
1946                         $tag{'epoch'} = $2;
1947                         $tag{'tz'} = $3;
1948                 } elsif ($line =~ m/--BEGIN/) {
1949                         push @comment, $line;
1950                         last;
1951                 } elsif ($line eq "") {
1952                         last;
1953                 }
1954         }
1955         push @comment, <$fd>;
1956         $tag{'comment'} = \@comment;
1957         close $fd or return;
1958         if (!defined $tag{'name'}) {
1959                 return
1960         };
1961         return %tag
1962 }
1963
1964 sub parse_commit_text {
1965         my ($commit_text, $withparents) = @_;
1966         my @commit_lines = split '\n', $commit_text;
1967         my %co;
1968
1969         pop @commit_lines; # Remove '\0'
1970
1971         if (! @commit_lines) {
1972                 return;
1973         }
1974
1975         my $header = shift @commit_lines;
1976         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1977                 return;
1978         }
1979         ($co{'id'}, my @parents) = split ' ', $header;
1980         while (my $line = shift @commit_lines) {
1981                 last if $line eq "\n";
1982                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1983                         $co{'tree'} = $1;
1984                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1985                         push @parents, $1;
1986                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1987                         $co{'author'} = $1;
1988                         $co{'author_epoch'} = $2;
1989                         $co{'author_tz'} = $3;
1990                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1991                                 $co{'author_name'}  = $1;
1992                                 $co{'author_email'} = $2;
1993                         } else {
1994                                 $co{'author_name'} = $co{'author'};
1995                         }
1996                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1997                         $co{'committer'} = $1;
1998                         $co{'committer_epoch'} = $2;
1999                         $co{'committer_tz'} = $3;
2000                         $co{'committer_name'} = $co{'committer'};
2001                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2002                                 $co{'committer_name'}  = $1;
2003                                 $co{'committer_email'} = $2;
2004                         } else {
2005                                 $co{'committer_name'} = $co{'committer'};
2006                         }
2007                 }
2008         }
2009         if (!defined $co{'tree'}) {
2010                 return;
2011         };
2012         $co{'parents'} = \@parents;
2013         $co{'parent'} = $parents[0];
2014
2015         foreach my $title (@commit_lines) {
2016                 $title =~ s/^    //;
2017                 if ($title ne "") {
2018                         $co{'title'} = chop_str($title, 80, 5);
2019                         # remove leading stuff of merges to make the interesting part visible
2020                         if (length($title) > 50) {
2021                                 $title =~ s/^Automatic //;
2022                                 $title =~ s/^merge (of|with) /Merge ... /i;
2023                                 if (length($title) > 50) {
2024                                         $title =~ s/(http|rsync):\/\///;
2025                                 }
2026                                 if (length($title) > 50) {
2027                                         $title =~ s/(master|www|rsync)\.//;
2028                                 }
2029                                 if (length($title) > 50) {
2030                                         $title =~ s/kernel.org:?//;
2031                                 }
2032                                 if (length($title) > 50) {
2033                                         $title =~ s/\/pub\/scm//;
2034                                 }
2035                         }
2036                         $co{'title_short'} = chop_str($title, 50, 5);
2037                         last;
2038                 }
2039         }
2040         if ($co{'title'} eq "") {
2041                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2042         }
2043         # remove added spaces
2044         foreach my $line (@commit_lines) {
2045                 $line =~ s/^    //;
2046         }
2047         $co{'comment'} = \@commit_lines;
2048
2049         my $age = time - $co{'committer_epoch'};
2050         $co{'age'} = $age;
2051         $co{'age_string'} = age_string($age);
2052         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2053         if ($age > 60*60*24*7*2) {
2054                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2055                 $co{'age_string_age'} = $co{'age_string'};
2056         } else {
2057                 $co{'age_string_date'} = $co{'age_string'};
2058                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2059         }
2060         return %co;
2061 }
2062
2063 sub parse_commit {
2064         my ($commit_id) = @_;
2065         my %co;
2066
2067         local $/ = "\0";
2068
2069         open my $fd, "-|", git_cmd(), "rev-list",
2070                 "--parents",
2071                 "--header",
2072                 "--max-count=1",
2073                 $commit_id,
2074                 "--",
2075                 or die_error(undef, "Open git-rev-list failed");
2076         %co = parse_commit_text(<$fd>, 1);
2077         close $fd;
2078
2079         return %co;
2080 }
2081
2082 sub parse_commits {
2083         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2084         my @cos;
2085
2086         $maxcount ||= 1;
2087         $skip ||= 0;
2088
2089         local $/ = "\0";
2090
2091         open my $fd, "-|", git_cmd(), "rev-list",
2092                 "--header",
2093                 @args,
2094                 ("--max-count=" . $maxcount),
2095                 ("--skip=" . $skip),
2096                 @extra_options,
2097                 $commit_id,
2098                 "--",
2099                 ($filename ? ($filename) : ())
2100                 or die_error(undef, "Open git-rev-list failed");
2101         while (my $line = <$fd>) {
2102                 my %co = parse_commit_text($line);
2103                 push @cos, \%co;
2104         }
2105         close $fd;
2106
2107         return wantarray ? @cos : \@cos;
2108 }
2109
2110 # parse ref from ref_file, given by ref_id, with given type
2111 sub parse_ref {
2112         my $ref_file = shift;
2113         my $ref_id = shift;
2114         my $type = shift || git_get_type($ref_id);
2115         my %ref_item;
2116
2117         $ref_item{'type'} = $type;
2118         $ref_item{'id'} = $ref_id;
2119         $ref_item{'epoch'} = 0;
2120         $ref_item{'age'} = "unknown";
2121         if ($type eq "tag") {
2122                 my %tag = parse_tag($ref_id);
2123                 $ref_item{'comment'} = $tag{'comment'};
2124                 if ($tag{'type'} eq "commit") {
2125                         my %co = parse_commit($tag{'object'});
2126                         $ref_item{'epoch'} = $co{'committer_epoch'};
2127                         $ref_item{'age'} = $co{'age_string'};
2128                 } elsif (defined($tag{'epoch'})) {
2129                         my $age = time - $tag{'epoch'};
2130                         $ref_item{'epoch'} = $tag{'epoch'};
2131                         $ref_item{'age'} = age_string($age);
2132                 }
2133                 $ref_item{'reftype'} = $tag{'type'};
2134                 $ref_item{'name'} = $tag{'name'};
2135                 $ref_item{'refid'} = $tag{'object'};
2136         } elsif ($type eq "commit"){
2137                 my %co = parse_commit($ref_id);
2138                 $ref_item{'reftype'} = "commit";
2139                 $ref_item{'name'} = $ref_file;
2140                 $ref_item{'title'} = $co{'title'};
2141                 $ref_item{'refid'} = $ref_id;
2142                 $ref_item{'epoch'} = $co{'committer_epoch'};
2143                 $ref_item{'age'} = $co{'age_string'};
2144         } else {
2145                 $ref_item{'reftype'} = $type;
2146                 $ref_item{'name'} = $ref_file;
2147                 $ref_item{'refid'} = $ref_id;
2148         }
2149
2150         return %ref_item;
2151 }
2152
2153 # parse line of git-diff-tree "raw" output
2154 sub parse_difftree_raw_line {
2155         my $line = shift;
2156         my %res;
2157
2158         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2159         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2160         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2161                 $res{'from_mode'} = $1;
2162                 $res{'to_mode'} = $2;
2163                 $res{'from_id'} = $3;
2164                 $res{'to_id'} = $4;
2165                 $res{'status'} = $res{'status_str'} = $5;
2166                 $res{'similarity'} = $6;
2167                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2168                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2169                 } else {
2170                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2171                 }
2172         }
2173         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2174         # combined diff (for merge commit)
2175         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2176                 $res{'nparents'}  = length($1);
2177                 $res{'from_mode'} = [ split(' ', $2) ];
2178                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2179                 $res{'from_id'} = [ split(' ', $3) ];
2180                 $res{'to_id'} = pop @{$res{'from_id'}};
2181                 $res{'status_str'} = $4;
2182                 $res{'status'} = [ split('', $4) ];
2183                 $res{'to_file'} = unquote($5);
2184         }
2185         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2186         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2187                 $res{'commit'} = $1;
2188         }
2189
2190         return wantarray ? %res : \%res;
2191 }
2192
2193 # wrapper: return parsed line of git-diff-tree "raw" output
2194 # (the argument might be raw line, or parsed info)
2195 sub parsed_difftree_line {
2196         my $line_or_ref = shift;
2197
2198         if (ref($line_or_ref) eq "HASH") {
2199                 # pre-parsed (or generated by hand)
2200                 return $line_or_ref;
2201         } else {
2202                 return parse_difftree_raw_line($line_or_ref);
2203         }
2204 }
2205
2206 # parse line of git-ls-tree output
2207 sub parse_ls_tree_line ($;%) {
2208         my $line = shift;
2209         my %opts = @_;
2210         my %res;
2211
2212         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2213         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2214
2215         $res{'mode'} = $1;
2216         $res{'type'} = $2;
2217         $res{'hash'} = $3;
2218         if ($opts{'-z'}) {
2219                 $res{'name'} = $4;
2220         } else {
2221                 $res{'name'} = unquote($4);
2222         }
2223
2224         return wantarray ? %res : \%res;
2225 }
2226
2227 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2228 sub parse_from_to_diffinfo {
2229         my ($diffinfo, $from, $to, @parents) = @_;
2230
2231         if ($diffinfo->{'nparents'}) {
2232                 # combined diff
2233                 $from->{'file'} = [];
2234                 $from->{'href'} = [];
2235                 fill_from_file_info($diffinfo, @parents)
2236                         unless exists $diffinfo->{'from_file'};
2237                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2238                         $from->{'file'}[$i] =
2239                                 defined $diffinfo->{'from_file'}[$i] ?
2240                                         $diffinfo->{'from_file'}[$i] :
2241                                         $diffinfo->{'to_file'};
2242                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2243                                 $from->{'href'}[$i] = href(action=>"blob",
2244                                                            hash_base=>$parents[$i],
2245                                                            hash=>$diffinfo->{'from_id'}[$i],
2246                                                            file_name=>$from->{'file'}[$i]);
2247                         } else {
2248                                 $from->{'href'}[$i] = undef;
2249                         }
2250                 }
2251         } else {
2252                 # ordinary (not combined) diff
2253                 $from->{'file'} = $diffinfo->{'from_file'};
2254                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2255                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2256                                                hash=>$diffinfo->{'from_id'},
2257                                                file_name=>$from->{'file'});
2258                 } else {
2259                         delete $from->{'href'};
2260                 }
2261         }
2262
2263         $to->{'file'} = $diffinfo->{'to_file'};
2264         if (!is_deleted($diffinfo)) { # file exists in result
2265                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2266                                      hash=>$diffinfo->{'to_id'},
2267                                      file_name=>$to->{'file'});
2268         } else {
2269                 delete $to->{'href'};
2270         }
2271 }
2272
2273 ## ......................................................................
2274 ## parse to array of hashes functions
2275
2276 sub git_get_heads_list {
2277         my $limit = shift;
2278         my @headslist;
2279
2280         open my $fd, '-|', git_cmd(), 'for-each-ref',
2281                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2282                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2283                 'refs/heads'
2284                 or return;
2285         while (my $line = <$fd>) {
2286                 my %ref_item;
2287
2288                 chomp $line;
2289                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2290                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2291                 my ($committer, $epoch, $tz) =
2292                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2293                 $ref_item{'fullname'}  = $name;
2294                 $name =~ s!^refs/heads/!!;
2295
2296                 $ref_item{'name'}  = $name;
2297                 $ref_item{'id'}    = $hash;
2298                 $ref_item{'title'} = $title || '(no commit message)';
2299                 $ref_item{'epoch'} = $epoch;
2300                 if ($epoch) {
2301                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2302                 } else {
2303                         $ref_item{'age'} = "unknown";
2304                 }
2305
2306                 push @headslist, \%ref_item;
2307         }
2308         close $fd;
2309
2310         return wantarray ? @headslist : \@headslist;
2311 }
2312
2313 sub git_get_tags_list {
2314         my $limit = shift;
2315         my @tagslist;
2316
2317         open my $fd, '-|', git_cmd(), 'for-each-ref',
2318                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2319                 '--format=%(objectname) %(objecttype) %(refname) '.
2320                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2321                 'refs/tags'
2322                 or return;
2323         while (my $line = <$fd>) {
2324                 my %ref_item;
2325
2326                 chomp $line;
2327                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2328                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2329                 my ($creator, $epoch, $tz) =
2330                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2331                 $ref_item{'fullname'} = $name;
2332                 $name =~ s!^refs/tags/!!;
2333
2334                 $ref_item{'type'} = $type;
2335                 $ref_item{'id'} = $id;
2336                 $ref_item{'name'} = $name;
2337                 if ($type eq "tag") {
2338                         $ref_item{'subject'} = $title;
2339                         $ref_item{'reftype'} = $reftype;
2340                         $ref_item{'refid'}   = $refid;
2341                 } else {
2342                         $ref_item{'reftype'} = $type;
2343                         $ref_item{'refid'}   = $id;
2344                 }
2345
2346                 if ($type eq "tag" || $type eq "commit") {
2347                         $ref_item{'epoch'} = $epoch;
2348                         if ($epoch) {
2349                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2350                         } else {
2351                                 $ref_item{'age'} = "unknown";
2352                         }
2353                 }
2354
2355                 push @tagslist, \%ref_item;
2356         }
2357         close $fd;
2358
2359         return wantarray ? @tagslist : \@tagslist;
2360 }
2361
2362 ## ----------------------------------------------------------------------
2363 ## filesystem-related functions
2364
2365 sub get_file_owner {
2366         my $path = shift;
2367
2368         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2369         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2370         if (!defined $gcos) {
2371                 return undef;
2372         }
2373         my $owner = $gcos;
2374         $owner =~ s/[,;].*$//;
2375         return to_utf8($owner);
2376 }
2377
2378 ## ......................................................................
2379 ## mimetype related functions
2380
2381 sub mimetype_guess_file {
2382         my $filename = shift;
2383         my $mimemap = shift;
2384         -r $mimemap or return undef;
2385
2386         my %mimemap;
2387         open(MIME, $mimemap) or return undef;
2388         while (<MIME>) {
2389                 next if m/^#/; # skip comments
2390                 my ($mime, $exts) = split(/\t+/);
2391                 if (defined $exts) {
2392                         my @exts = split(/\s+/, $exts);
2393                         foreach my $ext (@exts) {
2394                                 $mimemap{$ext} = $mime;
2395                         }
2396                 }
2397         }
2398         close(MIME);
2399
2400         $filename =~ /\.([^.]*)$/;
2401         return $mimemap{$1};
2402 }
2403
2404 sub mimetype_guess {
2405         my $filename = shift;
2406         my $mime;
2407         $filename =~ /\./ or return undef;
2408
2409         if ($mimetypes_file) {
2410                 my $file = $mimetypes_file;
2411                 if ($file !~ m!^/!) { # if it is relative path
2412                         # it is relative to project
2413                         $file = "$projectroot/$project/$file";
2414                 }
2415                 $mime = mimetype_guess_file($filename, $file);
2416         }
2417         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2418         return $mime;
2419 }
2420
2421 sub blob_mimetype {
2422         my $fd = shift;
2423         my $filename = shift;
2424
2425         if ($filename) {
2426                 my $mime = mimetype_guess($filename);
2427                 $mime and return $mime;
2428         }
2429
2430         # just in case
2431         return $default_blob_plain_mimetype unless $fd;
2432
2433         if (-T $fd) {
2434                 return 'text/plain' .
2435                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2436         } elsif (! $filename) {
2437                 return 'application/octet-stream';
2438         } elsif ($filename =~ m/\.png$/i) {
2439                 return 'image/png';
2440         } elsif ($filename =~ m/\.gif$/i) {
2441                 return 'image/gif';
2442         } elsif ($filename =~ m/\.jpe?g$/i) {
2443                 return 'image/jpeg';
2444         } else {
2445                 return 'application/octet-stream';
2446         }
2447 }
2448
2449 ## ======================================================================
2450 ## functions printing HTML: header, footer, error page
2451
2452 sub git_header_html {
2453         my $status = shift || "200 OK";
2454         my $expires = shift;
2455
2456         my $title = "$site_name";
2457         if (defined $project) {
2458                 $title .= " - " . to_utf8($project);
2459                 if (defined $action) {
2460                         $title .= "/$action";
2461                         if (defined $file_name) {
2462                                 $title .= " - " . esc_path($file_name);
2463                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2464                                         $title .= "/";
2465                                 }
2466                         }
2467                 }
2468         }
2469         my $content_type;
2470         # require explicit support from the UA if we are to send the page as
2471         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2472         # we have to do this because MSIE sometimes globs '*/*', pretending to
2473         # support xhtml+xml but choking when it gets what it asked for.
2474         if (defined $cgi->http('HTTP_ACCEPT') &&
2475             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2476             $cgi->Accept('application/xhtml+xml') != 0) {
2477                 $content_type = 'application/xhtml+xml';
2478         } else {
2479                 $content_type = 'text/html';
2480         }
2481         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2482                            -status=> $status, -expires => $expires);
2483         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2484         print <<EOF;
2485 <?xml version="1.0" encoding="utf-8"?>
2486 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2487 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2488 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2489 <!-- git core binaries version $git_version -->
2490 <head>
2491 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2492 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2493 <meta name="robots" content="index, nofollow"/>
2494 <title>$title</title>
2495 EOF
2496 # print out each stylesheet that exist
2497         if (defined $stylesheet) {
2498 #provides backwards capability for those people who define style sheet in a config file
2499                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2500         } else {
2501                 foreach my $stylesheet (@stylesheets) {
2502                         next unless $stylesheet;
2503                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2504                 }
2505         }
2506         if (defined $project) {
2507                 printf('<link rel="alternate" title="%s log RSS feed" '.
2508                        'href="%s" type="application/rss+xml" />'."\n",
2509                        esc_param($project), href(action=>"rss"));
2510                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2511                        'href="%s" type="application/rss+xml" />'."\n",
2512                        esc_param($project), href(action=>"rss",
2513                                                  extra_options=>"--no-merges"));
2514                 printf('<link rel="alternate" title="%s log Atom feed" '.
2515                        'href="%s" type="application/atom+xml" />'."\n",
2516                        esc_param($project), href(action=>"atom"));
2517                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2518                        'href="%s" type="application/atom+xml" />'."\n",
2519                        esc_param($project), href(action=>"atom",
2520                                                  extra_options=>"--no-merges"));
2521         } else {
2522                 printf('<link rel="alternate" title="%s projects list" '.
2523                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2524                        $site_name, href(project=>undef, action=>"project_index"));
2525                 printf('<link rel="alternate" title="%s projects feeds" '.
2526                        'href="%s" type="text/x-opml"/>'."\n",
2527                        $site_name, href(project=>undef, action=>"opml"));
2528         }
2529         if (defined $favicon) {
2530                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2531         }
2532
2533         print "</head>\n" .
2534               "<body>\n";
2535
2536         if (-f $site_header) {
2537                 open (my $fd, $site_header);
2538                 print <$fd>;
2539                 close $fd;
2540         }
2541
2542         print "<div class=\"page_header\">\n" .
2543               $cgi->a({-href => esc_url($logo_url),
2544                        -title => $logo_label},
2545                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2546         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2547         if (defined $project) {
2548                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2549                 if (defined $action) {
2550                         print " / $action";
2551                 }
2552                 print "\n";
2553         }
2554         print "</div>\n";
2555
2556         my ($have_search) = gitweb_check_feature('search');
2557         if ((defined $project) && ($have_search)) {
2558                 if (!defined $searchtext) {
2559                         $searchtext = "";
2560                 }
2561                 my $search_hash;
2562                 if (defined $hash_base) {
2563                         $search_hash = $hash_base;
2564                 } elsif (defined $hash) {
2565                         $search_hash = $hash;
2566                 } else {
2567                         $search_hash = "HEAD";
2568                 }
2569                 my $action = $my_uri;
2570                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2571                 if ($use_pathinfo) {
2572                         $action .= "/$project";
2573                 } else {
2574                         $cgi->param("p", $project);
2575                 }
2576                 $cgi->param("a", "search");
2577                 $cgi->param("h", $search_hash);
2578                 print $cgi->startform(-method => "get", -action => $action) .
2579                       "<div class=\"search\">\n" .
2580                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2581                       $cgi->hidden(-name => "a") . "\n" .
2582                       $cgi->hidden(-name => "h") . "\n" .
2583                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2584                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2585                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2586                       " search:\n",
2587                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2588                       "</div>" .
2589                       $cgi->end_form() . "\n";
2590         }
2591 }
2592
2593 sub git_footer_html {
2594         print "<div class=\"page_footer\">\n";
2595         if (defined $project) {
2596                 my $descr = git_get_project_description($project);
2597                 if (defined $descr) {
2598                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2599                 }
2600                 print $cgi->a({-href => href(action=>"rss"),
2601                               -class => "rss_logo"}, "RSS") . " ";
2602                 print $cgi->a({-href => href(action=>"atom"),
2603                               -class => "rss_logo"}, "Atom") . "\n";
2604         } else {
2605                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2606                               -class => "rss_logo"}, "OPML") . " ";
2607                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2608                               -class => "rss_logo"}, "TXT") . "\n";
2609         }
2610         print "</div>\n" ;
2611
2612         if (-f $site_footer) {
2613                 open (my $fd, $site_footer);
2614                 print <$fd>;
2615                 close $fd;
2616         }
2617
2618         print "</body>\n" .
2619               "</html>";
2620 }
2621
2622 sub die_error {
2623         my $status = shift || "403 Forbidden";
2624         my $error = shift || "Malformed query, file missing or permission denied";
2625
2626         git_header_html($status);
2627         print <<EOF;
2628 <div class="page_body">
2629 <br /><br />
2630 $status - $error
2631 <br />
2632 </div>
2633 EOF
2634         git_footer_html();
2635         exit;
2636 }
2637
2638 ## ----------------------------------------------------------------------
2639 ## functions printing or outputting HTML: navigation
2640
2641 sub git_print_page_nav {
2642         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2643         $extra = '' if !defined $extra; # pager or formats
2644
2645         my @navs = qw(summary shortlog log commit commitdiff tree);
2646         if ($suppress) {
2647                 @navs = grep { $_ ne $suppress } @navs;
2648         }
2649
2650         my %arg = map { $_ => {action=>$_} } @navs;
2651         if (defined $head) {
2652                 for (qw(commit commitdiff)) {
2653                         $arg{$_}{'hash'} = $head;
2654                 }
2655                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2656                         for (qw(shortlog log)) {
2657                                 $arg{$_}{'hash'} = $head;
2658                         }
2659                 }
2660         }
2661         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2662         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2663
2664         print "<div class=\"page_nav\">\n" .
2665                 (join " | ",
2666                  map { $_ eq $current ?
2667                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2668                  } @navs);
2669         print "<br/>\n$extra<br/>\n" .
2670               "</div>\n";
2671 }
2672
2673 sub format_paging_nav {
2674         my ($action, $hash, $head, $page, $nrevs) = @_;
2675         my $paging_nav;
2676
2677
2678         if ($hash ne $head || $page) {
2679                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2680         } else {
2681                 $paging_nav .= "HEAD";
2682         }
2683
2684         if ($page > 0) {
2685                 $paging_nav .= " &sdot; " .
2686                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2687                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2688         } else {
2689                 $paging_nav .= " &sdot; prev";
2690         }
2691
2692         if ($nrevs >= (100 * ($page+1)-1)) {
2693                 $paging_nav .= " &sdot; " .
2694                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2695                                  -accesskey => "n", -title => "Alt-n"}, "next");
2696         } else {
2697                 $paging_nav .= " &sdot; next";
2698         }
2699
2700         return $paging_nav;
2701 }
2702
2703 ## ......................................................................
2704 ## functions printing or outputting HTML: div
2705
2706 sub git_print_header_div {
2707         my ($action, $title, $hash, $hash_base) = @_;
2708         my %args = ();
2709
2710         $args{'action'} = $action;
2711         $args{'hash'} = $hash if $hash;
2712         $args{'hash_base'} = $hash_base if $hash_base;
2713
2714         print "<div class=\"header\">\n" .
2715               $cgi->a({-href => href(%args), -class => "title"},
2716               $title ? $title : $action) .
2717               "\n</div>\n";
2718 }
2719
2720 #sub git_print_authorship (\%) {
2721 sub git_print_authorship {
2722         my $co = shift;
2723
2724         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2725         print "<div class=\"author_date\">" .
2726               esc_html($co->{'author_name'}) .
2727               " [$ad{'rfc2822'}";
2728         if ($ad{'hour_local'} < 6) {
2729                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2730                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2731         } else {
2732                 printf(" (%02d:%02d %s)",
2733                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2734         }
2735         print "]</div>\n";
2736 }
2737
2738 sub git_print_page_path {
2739         my $name = shift;
2740         my $type = shift;
2741         my $hb = shift;
2742
2743
2744         print "<div class=\"page_path\">";
2745         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2746                       -title => 'tree root'}, to_utf8("[$project]"));
2747         print " / ";
2748         if (defined $name) {
2749                 my @dirname = split '/', $name;
2750                 my $basename = pop @dirname;
2751                 my $fullname = '';
2752
2753                 foreach my $dir (@dirname) {
2754                         $fullname .= ($fullname ? '/' : '') . $dir;
2755                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2756                                                      hash_base=>$hb),
2757                                       -title => $fullname}, esc_path($dir));
2758                         print " / ";
2759                 }
2760                 if (defined $type && $type eq 'blob') {
2761                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2762                                                      hash_base=>$hb),
2763                                       -title => $name}, esc_path($basename));
2764                 } elsif (defined $type && $type eq 'tree') {
2765                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2766                                                      hash_base=>$hb),
2767                                       -title => $name}, esc_path($basename));
2768                         print " / ";
2769                 } else {
2770                         print esc_path($basename);
2771                 }
2772         }
2773         print "<br/></div>\n";
2774 }
2775
2776 # sub git_print_log (\@;%) {
2777 sub git_print_log ($;%) {
2778         my $log = shift;
2779         my %opts = @_;
2780
2781         if ($opts{'-remove_title'}) {
2782                 # remove title, i.e. first line of log
2783                 shift @$log;
2784         }
2785         # remove leading empty lines
2786         while (defined $log->[0] && $log->[0] eq "") {
2787                 shift @$log;
2788         }
2789
2790         # print log
2791         my $signoff = 0;
2792         my $empty = 0;
2793         foreach my $line (@$log) {
2794                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2795                         $signoff = 1;
2796                         $empty = 0;
2797                         if (! $opts{'-remove_signoff'}) {
2798                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2799                                 next;
2800                         } else {
2801                                 # remove signoff lines
2802                                 next;
2803                         }
2804                 } else {
2805                         $signoff = 0;
2806                 }
2807
2808                 # print only one empty line
2809                 # do not print empty line after signoff
2810                 if ($line eq "") {
2811                         next if ($empty || $signoff);
2812                         $empty = 1;
2813                 } else {
2814                         $empty = 0;
2815                 }
2816
2817                 print format_log_line_html($line) . "<br/>\n";
2818         }
2819
2820         if ($opts{'-final_empty_line'}) {
2821                 # end with single empty line
2822                 print "<br/>\n" unless $empty;
2823         }
2824 }
2825
2826 # return link target (what link points to)
2827 sub git_get_link_target {
2828         my $hash = shift;
2829         my $link_target;
2830
2831         # read link
2832         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2833                 or return;
2834         {
2835                 local $/;
2836                 $link_target = <$fd>;
2837         }
2838         close $fd
2839                 or return;
2840
2841         return $link_target;
2842 }
2843
2844 # given link target, and the directory (basedir) the link is in,
2845 # return target of link relative to top directory (top tree);
2846 # return undef if it is not possible (including absolute links).
2847 sub normalize_link_target {
2848         my ($link_target, $basedir, $hash_base) = @_;
2849
2850         # we can normalize symlink target only if $hash_base is provided
2851         return unless $hash_base;
2852
2853         # absolute symlinks (beginning with '/') cannot be normalized
2854         return if (substr($link_target, 0, 1) eq '/');
2855
2856         # normalize link target to path from top (root) tree (dir)
2857         my $path;
2858         if ($basedir) {
2859                 $path = $basedir . '/' . $link_target;
2860         } else {
2861                 # we are in top (root) tree (dir)
2862                 $path = $link_target;
2863         }
2864
2865         # remove //, /./, and /../
2866         my @path_parts;
2867         foreach my $part (split('/', $path)) {
2868                 # discard '.' and ''
2869                 next if (!$part || $part eq '.');
2870                 # handle '..'
2871                 if ($part eq '..') {
2872                         if (@path_parts) {
2873                                 pop @path_parts;
2874                         } else {
2875                                 # link leads outside repository (outside top dir)
2876                                 return;
2877                         }
2878                 } else {
2879                         push @path_parts, $part;
2880                 }
2881         }
2882         $path = join('/', @path_parts);
2883
2884         return $path;
2885 }
2886
2887 # print tree entry (row of git_tree), but without encompassing <tr> element
2888 sub git_print_tree_entry {
2889         my ($t, $basedir, $hash_base, $have_blame) = @_;
2890
2891         my %base_key = ();
2892         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2893
2894         # The format of a table row is: mode list link.  Where mode is
2895         # the mode of the entry, list is the name of the entry, an href,
2896         # and link is the action links of the entry.
2897
2898         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2899         if ($t->{'type'} eq "blob") {
2900                 print "<td class=\"list\">" .
2901                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2902                                                file_name=>"$basedir$t->{'name'}", %base_key),
2903                                 -class => "list"}, esc_path($t->{'name'}));
2904                 if (S_ISLNK(oct $t->{'mode'})) {
2905                         my $link_target = git_get_link_target($t->{'hash'});
2906                         if ($link_target) {
2907                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2908                                 if (defined $norm_target) {
2909                                         print " -> " .
2910                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2911                                                                      file_name=>$norm_target),
2912                                                        -title => $norm_target}, esc_path($link_target));
2913                                 } else {
2914                                         print " -> " . esc_path($link_target);
2915                                 }
2916                         }
2917                 }
2918                 print "</td>\n";
2919                 print "<td class=\"link\">";
2920                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2921                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2922                               "blob");
2923                 if ($have_blame) {
2924                         print " | " .
2925                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2926                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2927                                       "blame");
2928                 }
2929                 if (defined $hash_base) {
2930                         print " | " .
2931                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2932                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2933                                       "history");
2934                 }
2935                 print " | " .
2936                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2937                                                file_name=>"$basedir$t->{'name'}")},
2938                                 "raw");
2939                 print "</td>\n";
2940
2941         } elsif ($t->{'type'} eq "tree") {
2942                 print "<td class=\"list\">";
2943                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2944                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2945                               esc_path($t->{'name'}));
2946                 print "</td>\n";
2947                 print "<td class=\"link\">";
2948                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2949                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2950                               "tree");
2951                 if (defined $hash_base) {
2952                         print " | " .
2953                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2954                                                      file_name=>"$basedir$t->{'name'}")},
2955                                       "history");
2956                 }
2957                 print "</td>\n";
2958         } else {
2959                 # unknown object: we can only present history for it
2960                 # (this includes 'commit' object, i.e. submodule support)
2961                 print "<td class=\"list\">" .
2962                       esc_path($t->{'name'}) .
2963                       "</td>\n";
2964                 print "<td class=\"link\">";
2965                 if (defined $hash_base) {
2966                         print $cgi->a({-href => href(action=>"history",
2967                                                      hash_base=>$hash_base,
2968                                                      file_name=>"$basedir$t->{'name'}")},
2969                                       "history");
2970                 }
2971                 print "</td>\n";
2972         }
2973 }
2974
2975 ## ......................................................................
2976 ## functions printing large fragments of HTML
2977
2978 # get pre-image filenames for merge (combined) diff
2979 sub fill_from_file_info {
2980         my ($diff, @parents) = @_;
2981
2982         $diff->{'from_file'} = [ ];
2983         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2984         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2985                 if ($diff->{'status'}[$i] eq 'R' ||
2986                     $diff->{'status'}[$i] eq 'C') {
2987                         $diff->{'from_file'}[$i] =
2988                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2989                 }
2990         }
2991
2992         return $diff;
2993 }
2994
2995 # is current raw difftree line of file deletion
2996 sub is_deleted {
2997         my $diffinfo = shift;
2998
2999         return $diffinfo->{'status_str'} =~ /D/;
3000 }
3001
3002 # does patch correspond to [previous] difftree raw line
3003 # $diffinfo  - hashref of parsed raw diff format
3004 # $patchinfo - hashref of parsed patch diff format
3005 #              (the same keys as in $diffinfo)
3006 sub is_patch_split {
3007         my ($diffinfo, $patchinfo) = @_;
3008
3009         return defined $diffinfo && defined $patchinfo
3010                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3011 }
3012
3013
3014 sub git_difftree_body {
3015         my ($difftree, $hash, @parents) = @_;
3016         my ($parent) = $parents[0];
3017         my ($have_blame) = gitweb_check_feature('blame');
3018         print "<div class=\"list_head\">\n";
3019         if ($#{$difftree} > 10) {
3020                 print(($#{$difftree} + 1) . " files changed:\n");
3021         }
3022         print "</div>\n";
3023
3024         print "<table class=\"" .
3025               (@parents > 1 ? "combined " : "") .
3026               "diff_tree\">\n";
3027
3028         # header only for combined diff in 'commitdiff' view
3029         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3030         if ($has_header) {
3031                 # table header
3032                 print "<thead><tr>\n" .
3033                        "<th></th><th></th>\n"; # filename, patchN link
3034                 for (my $i = 0; $i < @parents; $i++) {
3035                         my $par = $parents[$i];
3036                         print "<th>" .
3037                               $cgi->a({-href => href(action=>"commitdiff",
3038                                                      hash=>$hash, hash_parent=>$par),
3039                                        -title => 'commitdiff to parent number ' .
3040                                                   ($i+1) . ': ' . substr($par,0,7)},
3041                                       $i+1) .
3042                               "&nbsp;</th>\n";
3043                 }
3044                 print "</tr></thead>\n<tbody>\n";
3045         }
3046
3047         my $alternate = 1;
3048         my $patchno = 0;
3049         foreach my $line (@{$difftree}) {
3050                 my $diff = parsed_difftree_line($line);
3051
3052                 if ($alternate) {
3053                         print "<tr class=\"dark\">\n";
3054                 } else {
3055                         print "<tr class=\"light\">\n";
3056                 }
3057                 $alternate ^= 1;
3058
3059                 if (exists $diff->{'nparents'}) { # combined diff
3060
3061                         fill_from_file_info($diff, @parents)
3062                                 unless exists $diff->{'from_file'};
3063
3064                         if (!is_deleted($diff)) {
3065                                 # file exists in the result (child) commit
3066                                 print "<td>" .
3067                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3068                                                              file_name=>$diff->{'to_file'},
3069                                                              hash_base=>$hash),
3070                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3071                                       "</td>\n";
3072                         } else {
3073                                 print "<td>" .
3074                                       esc_path($diff->{'to_file'}) .
3075                                       "</td>\n";
3076                         }
3077
3078                         if ($action eq 'commitdiff') {
3079                                 # link to patch
3080                                 $patchno++;
3081                                 print "<td class=\"link\">" .
3082                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3083                                       " | " .
3084                                       "</td>\n";
3085                         }
3086
3087                         my $has_history = 0;
3088                         my $not_deleted = 0;
3089                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3090                                 my $hash_parent = $parents[$i];
3091                                 my $from_hash = $diff->{'from_id'}[$i];
3092                                 my $from_path = $diff->{'from_file'}[$i];
3093                                 my $status = $diff->{'status'}[$i];
3094
3095                                 $has_history ||= ($status ne 'A');
3096                                 $not_deleted ||= ($status ne 'D');
3097
3098                                 if ($status eq 'A') {
3099                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3100                                 } elsif ($status eq 'D') {
3101                                         print "<td class=\"link\">" .
3102                                               $cgi->a({-href => href(action=>"blob",
3103                                                                      hash_base=>$hash,
3104                                                                      hash=>$from_hash,
3105                                                                      file_name=>$from_path)},
3106                                                       "blob" . ($i+1)) .
3107                                               " | </td>\n";
3108                                 } else {
3109                                         if ($diff->{'to_id'} eq $from_hash) {
3110                                                 print "<td class=\"link nochange\">";
3111                                         } else {
3112                                                 print "<td class=\"link\">";
3113                                         }
3114                                         print $cgi->a({-href => href(action=>"blobdiff",
3115                                                                      hash=>$diff->{'to_id'},
3116                                                                      hash_parent=>$from_hash,
3117                                                                      hash_base=>$hash,
3118                                                                      hash_parent_base=>$hash_parent,
3119                                                                      file_name=>$diff->{'to_file'},
3120                                                                      file_parent=>$from_path)},
3121                                                       "diff" . ($i+1)) .
3122                                               " | </td>\n";
3123                                 }
3124                         }
3125
3126                         print "<td class=\"link\">";
3127                         if ($not_deleted) {
3128                                 print $cgi->a({-href => href(action=>"blob",
3129                                                              hash=>$diff->{'to_id'},
3130                                                              file_name=>$diff->{'to_file'},
3131                                                              hash_base=>$hash)},
3132                                               "blob");
3133                                 print " | " if ($has_history);
3134                         }
3135                         if ($has_history) {
3136                                 print $cgi->a({-href => href(action=>"history",
3137                                                              file_name=>$diff->{'to_file'},
3138                                                              hash_base=>$hash)},
3139                                               "history");
3140                         }
3141                         print "</td>\n";
3142
3143                         print "</tr>\n";
3144                         next; # instead of 'else' clause, to avoid extra indent
3145                 }
3146                 # else ordinary diff
3147
3148                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3149                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3150                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3151                         $to_mode_oct = oct $diff->{'to_mode'};
3152                         if (S_ISREG($to_mode_oct)) { # only for regular file
3153                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3154                         }
3155                         $to_file_type = file_type($diff->{'to_mode'});
3156                 }
3157                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3158                         $from_mode_oct = oct $diff->{'from_mode'};
3159                         if (S_ISREG($to_mode_oct)) { # only for regular file
3160                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3161                         }
3162                         $from_file_type = file_type($diff->{'from_mode'});
3163                 }
3164
3165                 if ($diff->{'status'} eq "A") { # created
3166                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3167                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3168                         $mode_chng   .= "]</span>";
3169                         print "<td>";
3170                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3171                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3172                                       -class => "list"}, esc_path($diff->{'file'}));
3173                         print "</td>\n";
3174                         print "<td>$mode_chng</td>\n";
3175                         print "<td class=\"link\">";
3176                         if ($action eq 'commitdiff') {
3177                                 # link to patch
3178                                 $patchno++;
3179                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3180                                 print " | ";
3181                         }
3182                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3183                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3184                                       "blob");
3185                         print "</td>\n";
3186
3187                 } elsif ($diff->{'status'} eq "D") { # deleted
3188                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3189                         print "<td>";
3190                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3191                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3192                                        -class => "list"}, esc_path($diff->{'file'}));
3193                         print "</td>\n";
3194                         print "<td>$mode_chng</td>\n";
3195                         print "<td class=\"link\">";
3196                         if ($action eq 'commitdiff') {
3197                                 # link to patch
3198                                 $patchno++;
3199                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3200                                 print " | ";
3201                         }
3202                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3203                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3204                                       "blob") . " | ";
3205                         if ($have_blame) {
3206                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3207                                                              file_name=>$diff->{'file'})},
3208                                               "blame") . " | ";
3209                         }
3210                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3211                                                      file_name=>$diff->{'file'})},
3212                                       "history");
3213                         print "</td>\n";
3214
3215                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3216                         my $mode_chnge = "";
3217                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3218                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3219                                 if ($from_file_type ne $to_file_type) {
3220                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3221                                 }
3222                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3223                                         if ($from_mode_str && $to_mode_str) {
3224                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3225                                         } elsif ($to_mode_str) {
3226                                                 $mode_chnge .= " mode: $to_mode_str";
3227                                         }
3228                                 }
3229                                 $mode_chnge .= "]</span>\n";
3230                         }
3231                         print "<td>";
3232                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3233                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3234                                       -class => "list"}, esc_path($diff->{'file'}));
3235                         print "</td>\n";
3236                         print "<td>$mode_chnge</td>\n";
3237                         print "<td class=\"link\">";
3238                         if ($action eq 'commitdiff') {
3239                                 # link to patch
3240                                 $patchno++;
3241                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3242                                       " | ";
3243                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3244                                 # "commit" view and modified file (not onlu mode changed)
3245                                 print $cgi->a({-href => href(action=>"blobdiff",
3246                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3247                                                              hash_base=>$hash, hash_parent_base=>$parent,
3248                                                              file_name=>$diff->{'file'})},
3249                                               "diff") .
3250                                       " | ";
3251                         }
3252                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3253                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3254                                        "blob") . " | ";
3255                         if ($have_blame) {
3256                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3257                                                              file_name=>$diff->{'file'})},
3258                                               "blame") . " | ";
3259                         }
3260                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3261                                                      file_name=>$diff->{'file'})},
3262                                       "history");
3263                         print "</td>\n";
3264
3265                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3266                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3267                         my $nstatus = $status_name{$diff->{'status'}};
3268                         my $mode_chng = "";
3269                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3270                                 # mode also for directories, so we cannot use $to_mode_str
3271                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3272                         }
3273                         print "<td>" .
3274                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3275                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3276                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3277                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3278                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3279                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3280                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3281                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3282                               "<td class=\"link\">";
3283                         if ($action eq 'commitdiff') {
3284                                 # link to patch
3285                                 $patchno++;
3286                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3287                                       " | ";
3288                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3289                                 # "commit" view and modified file (not only pure rename or copy)
3290                                 print $cgi->a({-href => href(action=>"blobdiff",
3291                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3292                                                              hash_base=>$hash, hash_parent_base=>$parent,
3293                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3294                                               "diff") .
3295                                       " | ";
3296                         }
3297                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3298                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3299                                       "blob") . " | ";
3300                         if ($have_blame) {
3301                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3302                                                              file_name=>$diff->{'to_file'})},
3303                                               "blame") . " | ";
3304                         }
3305                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3306                                                     file_name=>$diff->{'to_file'})},
3307                                       "history");
3308                         print "</td>\n";
3309
3310                 } # we should not encounter Unmerged (U) or Unknown (X) status
3311                 print "</tr>\n";
3312         }
3313         print "</tbody>" if $has_header;
3314         print "</table>\n";
3315 }
3316
3317 sub git_patchset_body {
3318         my ($fd, $difftree, $hash, @hash_parents) = @_;
3319         my ($hash_parent) = $hash_parents[0];
3320
3321         my $is_combined = (@hash_parents > 1);
3322         my $patch_idx = 0;
3323         my $patch_number = 0;
3324         my $patch_line;
3325         my $diffinfo;
3326         my $to_name;
3327         my (%from, %to);
3328
3329         print "<div class=\"patchset\">\n";
3330
3331         # skip to first patch
3332         while ($patch_line = <$fd>) {
3333                 chomp $patch_line;
3334
3335                 last if ($patch_line =~ m/^diff /);
3336         }
3337
3338  PATCH:
3339         while ($patch_line) {
3340
3341                 # parse "git diff" header line
3342                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3343                         # $1 is from_name, which we do not use
3344                         $to_name = unquote($2);
3345                         $to_name =~ s!^b/!!;
3346                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3347                         # $1 is 'cc' or 'combined', which we do not use
3348                         $to_name = unquote($2);
3349                 } else {
3350                         $to_name = undef;
3351                 }
3352
3353                 # check if current patch belong to current raw line
3354                 # and parse raw git-diff line if needed
3355                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3356                         # this is continuation of a split patch
3357                         print "<div class=\"patch cont\">\n";
3358                 } else {
3359                         # advance raw git-diff output if needed
3360                         $patch_idx++ if defined $diffinfo;
3361
3362                         # read and prepare patch information
3363                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3364
3365                         # compact combined diff output can have some patches skipped
3366                         # find which patch (using pathname of result) we are at now;
3367                         if ($is_combined) {
3368                                 while ($to_name ne $diffinfo->{'to_file'}) {
3369                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3370                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3371                                               "</div>\n";  # class="patch"
3372
3373                                         $patch_idx++;
3374                                         $patch_number++;
3375
3376                                         last if $patch_idx > $#$difftree;
3377                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3378                                 }
3379                         }
3380
3381                         # modifies %from, %to hashes
3382                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3383
3384                         # this is first patch for raw difftree line with $patch_idx index
3385                         # we index @$difftree array from 0, but number patches from 1
3386                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3387                 }
3388
3389                 # git diff header
3390                 #assert($patch_line =~ m/^diff /) if DEBUG;
3391                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3392                 $patch_number++;
3393                 # print "git diff" header
3394                 print format_git_diff_header_line($patch_line, $diffinfo,
3395                                                   \%from, \%to);
3396
3397                 # print extended diff header
3398                 print "<div class=\"diff extended_header\">\n";
3399         EXTENDED_HEADER:
3400                 while ($patch_line = <$fd>) {
3401                         chomp $patch_line;
3402
3403                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3404
3405                         print format_extended_diff_header_line($patch_line, $diffinfo,
3406                                                                \%from, \%to);
3407                 }
3408                 print "</div>\n"; # class="diff extended_header"
3409
3410                 # from-file/to-file diff header
3411                 if (! $patch_line) {
3412                         print "</div>\n"; # class="patch"
3413                         last PATCH;
3414                 }
3415                 next PATCH if ($patch_line =~ m/^diff /);
3416                 #assert($patch_line =~ m/^---/) if DEBUG;
3417
3418                 my $last_patch_line = $patch_line;
3419                 $patch_line = <$fd>;
3420                 chomp $patch_line;
3421                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3422
3423                 print format_diff_from_to_header($last_patch_line, $patch_line,
3424                                                  $diffinfo, \%from, \%to,
3425                                                  @hash_parents);
3426
3427                 # the patch itself
3428         LINE:
3429                 while ($patch_line = <$fd>) {
3430                         chomp $patch_line;
3431
3432                         next PATCH if ($patch_line =~ m/^diff /);
3433
3434                         print format_diff_line($patch_line, \%from, \%to);
3435                 }
3436
3437         } continue {
3438                 print "</div>\n"; # class="patch"
3439         }
3440
3441         # for compact combined (--cc) format, with chunk and patch simpliciaction
3442         # patchset might be empty, but there might be unprocessed raw lines
3443         for (++$patch_idx if $patch_number > 0;
3444              $patch_idx < @$difftree;
3445              ++$patch_idx) {
3446                 # read and prepare patch information
3447                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3448
3449                 # generate anchor for "patch" links in difftree / whatchanged part
3450                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3451                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3452                       "</div>\n";  # class="patch"
3453
3454                 $patch_number++;
3455         }
3456
3457         if ($patch_number == 0) {
3458                 if (@hash_parents > 1) {
3459                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3460                 } else {
3461                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3462                 }
3463         }
3464
3465         print "</div>\n"; # class="patchset"
3466 }
3467
3468 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3469
3470 sub git_project_list_body {
3471         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3472
3473         my ($check_forks) = gitweb_check_feature('forks');
3474
3475         my @projects;
3476         foreach my $pr (@$projlist) {
3477                 my (@aa) = git_get_last_activity($pr->{'path'});
3478                 unless (@aa) {
3479                         next;
3480                 }
3481                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3482                 if (!defined $pr->{'descr'}) {
3483                         my $descr = git_get_project_description($pr->{'path'}) || "";
3484                         $pr->{'descr_long'} = to_utf8($descr);
3485                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3486                 }
3487                 if (!defined $pr->{'owner'}) {
3488                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3489                 }
3490                 if ($check_forks) {
3491                         my $pname = $pr->{'path'};
3492                         if (($pname =~ s/\.git$//) &&
3493                             ($pname !~ /\/$/) &&
3494                             (-d "$projectroot/$pname")) {
3495                                 $pr->{'forks'} = "-d $projectroot/$pname";
3496                         }
3497                         else {
3498                                 $pr->{'forks'} = 0;
3499                         }
3500                 }
3501                 push @projects, $pr;
3502         }
3503
3504         $order ||= $default_projects_order;
3505         $from = 0 unless defined $from;
3506         $to = $#projects if (!defined $to || $#projects < $to);
3507
3508         print "<table class=\"project_list\">\n";
3509         unless ($no_header) {
3510                 print "<tr>\n";
3511                 if ($check_forks) {
3512                         print "<th></th>\n";
3513                 }
3514                 if ($order eq "project") {
3515                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3516                         print "<th>Project</th>\n";
3517                 } else {
3518                         print "<th>" .
3519                               $cgi->a({-href => href(project=>undef, order=>'project'),
3520                                        -class => "header"}, "Project") .
3521                               "</th>\n";
3522                 }
3523                 if ($order eq "descr") {
3524                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3525                         print "<th>Description</th>\n";
3526                 } else {
3527                         print "<th>" .
3528                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3529                                        -class => "header"}, "Description") .
3530                               "</th>\n";
3531                 }
3532                 if ($order eq "owner") {
3533                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3534                         print "<th>Owner</th>\n";
3535                 } else {
3536                         print "<th>" .
3537                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3538                                        -class => "header"}, "Owner") .
3539                               "</th>\n";
3540                 }
3541                 if ($order eq "age") {
3542                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3543                         print "<th>Last Change</th>\n";
3544                 } else {
3545                         print "<th>" .
3546                               $cgi->a({-href => href(project=>undef, order=>'age'),
3547                                        -class => "header"}, "Last Change") .
3548                               "</th>\n";
3549                 }
3550                 print "<th></th>\n" .
3551                       "</tr>\n";
3552         }
3553         my $alternate = 1;
3554         for (my $i = $from; $i <= $to; $i++) {
3555                 my $pr = $projects[$i];
3556                 if ($alternate) {
3557                         print "<tr class=\"dark\">\n";
3558                 } else {
3559                         print "<tr class=\"light\">\n";
3560                 }
3561                 $alternate ^= 1;
3562                 if ($check_forks) {
3563                         print "<td>";
3564                         if ($pr->{'forks'}) {
3565                                 print "<!-- $pr->{'forks'} -->\n";
3566                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3567                         }
3568                         print "</td>\n";
3569                 }
3570                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3571                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3572                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3573                                         -class => "list", -title => $pr->{'descr_long'}},
3574                                         esc_html($pr->{'descr'})) . "</td>\n" .
3575                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3576                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3577                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3578                       "<td class=\"link\">" .
3579                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3580                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3581                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3582                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3583                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3584                       "</td>\n" .
3585                       "</tr>\n";
3586         }
3587         if (defined $extra) {
3588                 print "<tr>\n";
3589                 if ($check_forks) {
3590                         print "<td></td>\n";
3591                 }
3592                 print "<td colspan=\"5\">$extra</td>\n" .
3593                       "</tr>\n";
3594         }
3595         print "</table>\n";
3596 }
3597
3598 sub git_shortlog_body {
3599         # uses global variable $project
3600         my ($commitlist, $from, $to, $refs, $extra) = @_;
3601
3602         $from = 0 unless defined $from;
3603         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3604
3605         print "<table class=\"shortlog\">\n";
3606         my $alternate = 1;
3607         for (my $i = $from; $i <= $to; $i++) {
3608                 my %co = %{$commitlist->[$i]};
3609                 my $commit = $co{'id'};
3610                 my $ref = format_ref_marker($refs, $commit);
3611                 if ($alternate) {
3612                         print "<tr class=\"dark\">\n";
3613                 } else {
3614                         print "<tr class=\"light\">\n";
3615                 }
3616                 $alternate ^= 1;
3617                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3618                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3619                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3620                       "<td><i>" . $author . "</i></td>\n" .
3621                       "<td>";
3622                 print format_subject_html($co{'title'}, $co{'title_short'},
3623                                           href(action=>"commit", hash=>$commit), $ref);
3624                 print "</td>\n" .
3625                       "<td class=\"link\">" .
3626                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3627                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3628                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3629                 my $snapshot_links = format_snapshot_links($commit);
3630                 if (defined $snapshot_links) {
3631                         print " | " . $snapshot_links;
3632                 }
3633                 print "</td>\n" .
3634                       "</tr>\n";
3635         }
3636         if (defined $extra) {
3637                 print "<tr>\n" .
3638                       "<td colspan=\"4\">$extra</td>\n" .
3639                       "</tr>\n";
3640         }
3641         print "</table>\n";
3642 }
3643
3644 sub git_history_body {
3645         # Warning: assumes constant type (blob or tree) during history
3646         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3647
3648         $from = 0 unless defined $from;
3649         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3650
3651         print "<table class=\"history\">\n";
3652         my $alternate = 1;
3653         for (my $i = $from; $i <= $to; $i++) {
3654                 my %co = %{$commitlist->[$i]};
3655                 if (!%co) {
3656                         next;
3657                 }
3658                 my $commit = $co{'id'};
3659
3660                 my $ref = format_ref_marker($refs, $commit);
3661
3662                 if ($alternate) {
3663                         print "<tr class=\"dark\">\n";
3664                 } else {
3665                         print "<tr class=\"light\">\n";
3666                 }
3667                 $alternate ^= 1;
3668         # shortlog uses      chop_str($co{'author_name'}, 10)
3669                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3670                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3671                       "<td><i>" . $author . "</i></td>\n" .
3672                       "<td>";
3673                 # originally git_history used chop_str($co{'title'}, 50)
3674                 print format_subject_html($co{'title'}, $co{'title_short'},
3675                                           href(action=>"commit", hash=>$commit), $ref);
3676                 print "</td>\n" .
3677                       "<td class=\"link\">" .
3678                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3679                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3680
3681                 if ($ftype eq 'blob') {
3682                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3683                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3684                         if (defined $blob_current && defined $blob_parent &&
3685                                         $blob_current ne $blob_parent) {
3686                                 print " | " .
3687                                         $cgi->a({-href => href(action=>"blobdiff",
3688                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3689                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3690                                                                file_name=>$file_name)},
3691                                                 "diff to current");
3692                         }
3693                 }
3694                 print "</td>\n" .
3695                       "</tr>\n";
3696         }
3697         if (defined $extra) {
3698                 print "<tr>\n" .
3699                       "<td colspan=\"4\">$extra</td>\n" .
3700                       "</tr>\n";
3701         }
3702         print "</table>\n";
3703 }
3704
3705 sub git_tags_body {
3706         # uses global variable $project
3707         my ($taglist, $from, $to, $extra) = @_;
3708         $from = 0 unless defined $from;
3709         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3710
3711         print "<table class=\"tags\">\n";
3712         my $alternate = 1;
3713         for (my $i = $from; $i <= $to; $i++) {
3714                 my $entry = $taglist->[$i];
3715                 my %tag = %$entry;
3716                 my $comment = $tag{'subject'};
3717                 my $comment_short;
3718                 if (defined $comment) {
3719                         $comment_short = chop_str($comment, 30, 5);
3720                 }
3721                 if ($alternate) {
3722                         print "<tr class=\"dark\">\n";
3723                 } else {
3724                         print "<tr class=\"light\">\n";
3725                 }
3726                 $alternate ^= 1;
3727                 if (defined $tag{'age'}) {
3728                         print "<td><i>$tag{'age'}</i></td>\n";
3729                 } else {
3730                         print "<td></td>\n";
3731                 }
3732                 print "<td>" .
3733                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3734                                -class => "list name"}, esc_html($tag{'name'})) .
3735                       "</td>\n" .
3736                       "<td>";
3737                 if (defined $comment) {
3738                         print format_subject_html($comment, $comment_short,
3739                                                   href(action=>"tag", hash=>$tag{'id'}));
3740                 }
3741                 print "</td>\n" .
3742                       "<td class=\"selflink\">";
3743                 if ($tag{'type'} eq "tag") {
3744                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3745                 } else {
3746                         print "&nbsp;";
3747                 }
3748                 print "</td>\n" .
3749                       "<td class=\"link\">" . " | " .
3750                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3751                 if ($tag{'reftype'} eq "commit") {
3752                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3753                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3754                 } elsif ($tag{'reftype'} eq "blob") {
3755                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3756                 }
3757                 print "</td>\n" .
3758                       "</tr>";
3759         }
3760         if (defined $extra) {
3761                 print "<tr>\n" .
3762                       "<td colspan=\"5\">$extra</td>\n" .
3763                       "</tr>\n";
3764         }
3765         print "</table>\n";
3766 }
3767
3768 sub git_heads_body {
3769         # uses global variable $project
3770         my ($headlist, $head, $from, $to, $extra) = @_;
3771         $from = 0 unless defined $from;
3772         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3773
3774         print "<table class=\"heads\">\n";
3775         my $alternate = 1;
3776         for (my $i = $from; $i <= $to; $i++) {
3777                 my $entry = $headlist->[$i];
3778                 my %ref = %$entry;
3779                 my $curr = $ref{'id'} eq $head;
3780                 if ($alternate) {
3781                         print "<tr class=\"dark\">\n";
3782                 } else {
3783                         print "<tr class=\"light\">\n";
3784                 }
3785                 $alternate ^= 1;
3786                 print "<td><i>$ref{'age'}</i></td>\n" .
3787                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3788                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3789                                -class => "list name"},esc_html($ref{'name'})) .
3790                       "</td>\n" .
3791                       "<td class=\"link\">" .
3792                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3793                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3794                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3795                       "</td>\n" .
3796                       "</tr>";
3797         }
3798         if (defined $extra) {
3799                 print "<tr>\n" .
3800                       "<td colspan=\"3\">$extra</td>\n" .
3801                       "</tr>\n";
3802         }
3803         print "</table>\n";
3804 }
3805
3806 sub git_search_grep_body {
3807         my ($commitlist, $from, $to, $extra) = @_;
3808         $from = 0 unless defined $from;
3809         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3810
3811         print "<table class=\"commit_search\">\n";
3812         my $alternate = 1;
3813         for (my $i = $from; $i <= $to; $i++) {
3814                 my %co = %{$commitlist->[$i]};
3815                 if (!%co) {
3816                         next;
3817                 }
3818                 my $commit = $co{'id'};
3819                 if ($alternate) {
3820                         print "<tr class=\"dark\">\n";
3821                 } else {
3822                         print "<tr class=\"light\">\n";
3823                 }
3824                 $alternate ^= 1;
3825                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3826                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3827                       "<td><i>" . $author . "</i></td>\n" .
3828                       "<td>" .
3829                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3830                                -class => "list subject"},
3831                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3832                 my $comment = $co{'comment'};
3833                 foreach my $line (@$comment) {
3834                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3835                                 my ($lead, $match, $trail) = ($1, $2, $3);
3836                                 $match = chop_str($match, 70, 5, 'center');
3837                                 my $contextlen = int((80 - length($match))/2);
3838                                 $contextlen = 30 if ($contextlen > 30);
3839                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3840                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3841
3842                                 $lead  = esc_html($lead);
3843                                 $match = esc_html($match);
3844                                 $trail = esc_html($trail);
3845
3846                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3847                         }
3848                 }
3849                 print "</td>\n" .
3850                       "<td class=\"link\">" .
3851                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3852                       " | " .
3853                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3854                       " | " .
3855                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3856                 print "</td>\n" .
3857                       "</tr>\n";
3858         }
3859         if (defined $extra) {
3860                 print "<tr>\n" .
3861                       "<td colspan=\"3\">$extra</td>\n" .
3862                       "</tr>\n";
3863         }
3864         print "</table>\n";
3865 }
3866
3867 ## ======================================================================
3868 ## ======================================================================
3869 ## actions
3870
3871 sub git_project_list {
3872         my $order = $cgi->param('o');
3873         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3874                 die_error(undef, "Unknown order parameter");
3875         }
3876
3877         my @list = git_get_projects_list();
3878         if (!@list) {
3879                 die_error(undef, "No projects found");
3880         }
3881
3882         git_header_html();
3883         if (-f $home_text) {
3884                 print "<div class=\"index_include\">\n";
3885                 open (my $fd, $home_text);
3886                 print <$fd>;
3887                 close $fd;
3888                 print "</div>\n";
3889         }
3890         git_project_list_body(\@list, $order);
3891         git_footer_html();
3892 }
3893
3894 sub git_forks {
3895         my $order = $cgi->param('o');
3896         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3897                 die_error(undef, "Unknown order parameter");
3898         }
3899
3900         my @list = git_get_projects_list($project);
3901         if (!@list) {
3902                 die_error(undef, "No forks found");
3903         }
3904
3905         git_header_html();
3906         git_print_page_nav('','');
3907         git_print_header_div('summary', "$project forks");
3908         git_project_list_body(\@list, $order);
3909         git_footer_html();
3910 }
3911
3912 sub git_project_index {
3913         my @projects = git_get_projects_list($project);
3914
3915         print $cgi->header(
3916                 -type => 'text/plain',
3917                 -charset => 'utf-8',
3918                 -content_disposition => 'inline; filename="index.aux"');
3919
3920         foreach my $pr (@projects) {
3921                 if (!exists $pr->{'owner'}) {
3922                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3923                 }
3924
3925                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3926                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3927                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3928                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3929                 $path  =~ s/ /\+/g;
3930                 $owner =~ s/ /\+/g;
3931
3932                 print "$path $owner\n";
3933         }
3934 }
3935
3936 sub git_summary {
3937         my $descr = git_get_project_description($project) || "none";
3938         my %co = parse_commit("HEAD");
3939         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3940         my $head = $co{'id'};
3941
3942         my $owner = git_get_project_owner($project);
3943
3944         my $refs = git_get_references();
3945         # These get_*_list functions return one more to allow us to see if
3946         # there are more ...
3947         my @taglist  = git_get_tags_list(16);
3948         my @headlist = git_get_heads_list(16);
3949         my @forklist;
3950         my ($check_forks) = gitweb_check_feature('forks');
3951
3952         if ($check_forks) {
3953                 @forklist = git_get_projects_list($project);
3954         }
3955
3956         git_header_html();
3957         git_print_page_nav('summary','', $head);
3958
3959         print "<div class=\"title\">&nbsp;</div>\n";
3960         print "<table class=\"projects_list\">\n" .
3961               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3962               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3963         if (defined $cd{'rfc2822'}) {
3964                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3965         }
3966
3967         # use per project git URL list in $projectroot/$project/cloneurl
3968         # or make project git URL from git base URL and project name
3969         my $url_tag = "URL";
3970         my @url_list = git_get_project_url_list($project);
3971         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3972         foreach my $git_url (@url_list) {
3973                 next unless $git_url;
3974                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3975                 $url_tag = "";
3976         }
3977         print "</table>\n";
3978
3979         if (-s "$projectroot/$project/README.html") {
3980                 if (open my $fd, "$projectroot/$project/README.html") {
3981                         print "<div class=\"title\">readme</div>\n" .
3982                               "<div class=\"readme\">\n";
3983                         print $_ while (<$fd>);
3984                         print "\n</div>\n"; # class="readme"
3985                         close $fd;
3986                 }
3987         }
3988
3989         # we need to request one more than 16 (0..15) to check if
3990         # those 16 are all
3991         my @commitlist = $head ? parse_commits($head, 17) : ();
3992         if (@commitlist) {
3993                 git_print_header_div('shortlog');
3994                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3995                                   $#commitlist <=  15 ? undef :
3996                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3997         }
3998
3999         if (@taglist) {
4000                 git_print_header_div('tags');
4001                 git_tags_body(\@taglist, 0, 15,
4002                               $#taglist <=  15 ? undef :
4003                               $cgi->a({-href => href(action=>"tags")}, "..."));
4004         }
4005
4006         if (@headlist) {
4007                 git_print_header_div('heads');
4008                 git_heads_body(\@headlist, $head, 0, 15,
4009                                $#headlist <= 15 ? undef :
4010                                $cgi->a({-href => href(action=>"heads")}, "..."));
4011         }
4012
4013         if (@forklist) {
4014                 git_print_header_div('forks');
4015                 git_project_list_body(\@forklist, undef, 0, 15,
4016                                       $#forklist <= 15 ? undef :
4017                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4018                                       'noheader');
4019         }
4020
4021         git_footer_html();
4022 }
4023
4024 sub git_tag {
4025         my $head = git_get_head_hash($project);
4026         git_header_html();
4027         git_print_page_nav('','', $head,undef,$head);
4028         my %tag = parse_tag($hash);
4029
4030         if (! %tag) {
4031                 die_error(undef, "Unknown tag object");
4032         }
4033
4034         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4035         print "<div class=\"title_text\">\n" .
4036               "<table class=\"object_header\">\n" .
4037               "<tr>\n" .
4038               "<td>object</td>\n" .
4039               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4040                                $tag{'object'}) . "</td>\n" .
4041               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4042                                               $tag{'type'}) . "</td>\n" .
4043               "</tr>\n";
4044         if (defined($tag{'author'})) {
4045                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4046                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4047                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4048                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4049                         "</td></tr>\n";
4050         }
4051         print "</table>\n\n" .
4052               "</div>\n";
4053         print "<div class=\"page_body\">";
4054         my $comment = $tag{'comment'};
4055         foreach my $line (@$comment) {
4056                 chomp $line;
4057                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4058         }
4059         print "</div>\n";
4060         git_footer_html();
4061 }
4062
4063 sub git_blame2 {
4064         my $fd;
4065         my $ftype;
4066
4067         my ($have_blame) = gitweb_check_feature('blame');
4068         if (!$have_blame) {
4069                 die_error('403 Permission denied', "Permission denied");
4070         }
4071         die_error('404 Not Found', "File name not defined") if (!$file_name);
4072         $hash_base ||= git_get_head_hash($project);
4073         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4074         my %co = parse_commit($hash_base)
4075                 or die_error(undef, "Reading commit failed");
4076         if (!defined $hash) {
4077                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4078                         or die_error(undef, "Error looking up file");
4079         }
4080         $ftype = git_get_type($hash);
4081         if ($ftype !~ "blob") {
4082                 die_error('400 Bad Request', "Object is not a blob");
4083         }
4084         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4085               $file_name, $hash_base)
4086                 or die_error(undef, "Open git-blame failed");
4087         git_header_html();
4088         my $formats_nav =
4089                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4090                         "blob") .
4091                 " | " .
4092                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4093                         "history") .
4094                 " | " .
4095                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4096                         "HEAD");
4097         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4098         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4099         git_print_page_path($file_name, $ftype, $hash_base);
4100         my @rev_color = (qw(light2 dark2));
4101         my $num_colors = scalar(@rev_color);
4102         my $current_color = 0;
4103         my $last_rev;
4104         print <<HTML;
4105 <div class="page_body">
4106 <table class="blame">
4107 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4108 HTML
4109         my %metainfo = ();
4110         while (1) {
4111                 $_ = <$fd>;
4112                 last unless defined $_;
4113                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4114                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4115                 if (!exists $metainfo{$full_rev}) {
4116                         $metainfo{$full_rev} = {};
4117                 }
4118                 my $meta = $metainfo{$full_rev};
4119                 while (<$fd>) {
4120                         last if (s/^\t//);
4121                         if (/^(\S+) (.*)$/) {
4122                                 $meta->{$1} = $2;
4123                         }
4124                 }
4125                 my $data = $_;
4126                 chomp $data;
4127                 my $rev = substr($full_rev, 0, 8);
4128                 my $author = $meta->{'author'};
4129                 my %date = parse_date($meta->{'author-time'},
4130                                       $meta->{'author-tz'});
4131                 my $date = $date{'iso-tz'};
4132                 if ($group_size) {
4133                         $current_color = ++$current_color % $num_colors;
4134                 }
4135                 print "<tr class=\"$rev_color[$current_color]\">\n";
4136                 if ($group_size) {
4137                         print "<td class=\"sha1\"";
4138                         print " title=\"". esc_html($author) . ", $date\"";
4139                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4140                         print ">";
4141                         print $cgi->a({-href => href(action=>"commit",
4142                                                      hash=>$full_rev,
4143                                                      file_name=>$file_name)},
4144                                       esc_html($rev));
4145                         print "</td>\n";
4146                 }
4147                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4148                         or die_error(undef, "Open git-rev-parse failed");
4149                 my $parent_commit = <$dd>;
4150                 close $dd;
4151                 chomp($parent_commit);
4152                 my $blamed = href(action => 'blame',
4153                                   file_name => $meta->{'filename'},
4154                                   hash_base => $parent_commit);
4155                 print "<td class=\"linenr\">";
4156                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4157                                 -id => "l$lineno",
4158                                 -class => "linenr" },
4159                               esc_html($lineno));
4160                 print "</td>";
4161                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4162                 print "</tr>\n";
4163         }
4164         print "</table>\n";
4165         print "</div>";
4166         close $fd
4167                 or print "Reading blob failed\n";
4168         git_footer_html();
4169 }
4170
4171 sub git_blame {
4172         my $fd;
4173
4174         my ($have_blame) = gitweb_check_feature('blame');
4175         if (!$have_blame) {
4176                 die_error('403 Permission denied', "Permission denied");
4177         }
4178         die_error('404 Not Found', "File name not defined") if (!$file_name);
4179         $hash_base ||= git_get_head_hash($project);
4180         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4181         my %co = parse_commit($hash_base)
4182                 or die_error(undef, "Reading commit failed");
4183         if (!defined $hash) {
4184                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4185                         or die_error(undef, "Error lookup file");
4186         }
4187         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4188                 or die_error(undef, "Open git-annotate failed");
4189         git_header_html();
4190         my $formats_nav =
4191                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4192                         "blob") .
4193                 " | " .
4194                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4195                         "history") .
4196                 " | " .
4197                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4198                         "HEAD");
4199         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4200         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4201         git_print_page_path($file_name, 'blob', $hash_base);
4202         print "<div class=\"page_body\">\n";
4203         print <<HTML;
4204 <table class="blame">
4205   <tr>
4206     <th>Commit</th>
4207     <th>Age</th>
4208     <th>Author</th>
4209     <th>Line</th>
4210     <th>Data</th>
4211   </tr>
4212 HTML
4213         my @line_class = (qw(light dark));
4214         my $line_class_len = scalar (@line_class);
4215         my $line_class_num = $#line_class;
4216         while (my $line = <$fd>) {
4217                 my $long_rev;
4218                 my $short_rev;
4219                 my $author;
4220                 my $time;
4221                 my $lineno;
4222                 my $data;
4223                 my $age;
4224                 my $age_str;
4225                 my $age_class;
4226
4227                 chomp $line;
4228                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4229
4230                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4231                         $long_rev = $1;
4232                         $author   = $2;
4233                         $time     = $3;
4234                         $lineno   = $4;
4235                         $data     = $5;
4236                 } else {
4237                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4238                         next;
4239                 }
4240                 $short_rev  = substr ($long_rev, 0, 8);
4241                 $age        = time () - $time;
4242                 $age_str    = age_string ($age);
4243                 $age_str    =~ s/ /&nbsp;/g;
4244                 $age_class  = age_class($age);
4245                 $author     = esc_html ($author);
4246                 $author     =~ s/ /&nbsp;/g;
4247
4248                 $data = untabify($data);
4249                 $data = esc_html ($data);
4250
4251                 print <<HTML;
4252   <tr class="$line_class[$line_class_num]">
4253     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4254     <td class="$age_class">$age_str</td>
4255     <td>$author</td>
4256     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4257     <td class="pre">$data</td>
4258   </tr>
4259 HTML
4260         } # while (my $line = <$fd>)
4261         print "</table>\n\n";
4262         close $fd
4263                 or print "Reading blob failed.\n";
4264         print "</div>";
4265         git_footer_html();
4266 }
4267
4268 sub git_tags {
4269         my $head = git_get_head_hash($project);
4270         git_header_html();
4271         git_print_page_nav('','', $head,undef,$head);
4272         git_print_header_div('summary', $project);
4273
4274         my @tagslist = git_get_tags_list();
4275         if (@tagslist) {
4276                 git_tags_body(\@tagslist);
4277         }
4278         git_footer_html();
4279 }
4280
4281 sub git_heads {
4282         my $head = git_get_head_hash($project);
4283         git_header_html();
4284         git_print_page_nav('','', $head,undef,$head);
4285         git_print_header_div('summary', $project);
4286
4287         my @headslist = git_get_heads_list();
4288         if (@headslist) {
4289                 git_heads_body(\@headslist, $head);
4290         }
4291         git_footer_html();
4292 }
4293
4294 sub git_blob_plain {
4295         my $expires;
4296
4297         if (!defined $hash) {
4298                 if (defined $file_name) {
4299                         my $base = $hash_base || git_get_head_hash($project);
4300                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4301                                 or die_error(undef, "Error lookup file");
4302                 } else {
4303                         die_error(undef, "No file name defined");
4304                 }
4305         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4306                 # blobs defined by non-textual hash id's can be cached
4307                 $expires = "+1d";
4308         }
4309
4310         my $type = shift;
4311         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4312                 or die_error(undef, "Couldn't cat $file_name, $hash");
4313
4314         $type ||= blob_mimetype($fd, $file_name);
4315
4316         # save as filename, even when no $file_name is given
4317         my $save_as = "$hash";
4318         if (defined $file_name) {
4319                 $save_as = $file_name;
4320         } elsif ($type =~ m/^text\//) {
4321                 $save_as .= '.txt';
4322         }
4323
4324         print $cgi->header(
4325                 -type => "$type",
4326                 -expires=>$expires,
4327                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4328         undef $/;
4329         binmode STDOUT, ':raw';
4330         print <$fd>;
4331         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4332         $/ = "\n";
4333         close $fd;
4334 }
4335
4336 sub git_blob {
4337         my $expires;
4338
4339         if (!defined $hash) {
4340                 if (defined $file_name) {
4341                         my $base = $hash_base || git_get_head_hash($project);
4342                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4343                                 or die_error(undef, "Error lookup file");
4344                 } else {
4345                         die_error(undef, "No file name defined");
4346                 }
4347         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4348                 # blobs defined by non-textual hash id's can be cached
4349                 $expires = "+1d";
4350         }
4351
4352         my ($have_blame) = gitweb_check_feature('blame');
4353         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4354                 or die_error(undef, "Couldn't cat $file_name, $hash");
4355         my $mimetype = blob_mimetype($fd, $file_name);
4356         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4357                 close $fd;
4358                 return git_blob_plain($mimetype);
4359         }
4360         # we can have blame only for text/* mimetype
4361         $have_blame &&= ($mimetype =~ m!^text/!);
4362
4363         git_header_html(undef, $expires);
4364         my $formats_nav = '';
4365         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4366                 if (defined $file_name) {
4367                         if ($have_blame) {
4368                                 $formats_nav .=
4369                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4370                                                 "blame") .
4371                                         " | ";
4372                         }
4373                         $formats_nav .=
4374                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4375                                         "history") .
4376                                 " | " .
4377                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4378                                         "raw") .
4379                                 " | " .
4380                                 $cgi->a({-href => href(action=>"blob",
4381                                                        hash_base=>"HEAD", file_name=>$file_name)},
4382                                         "HEAD");
4383                 } else {
4384                         $formats_nav .=
4385                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4386                                         "raw");
4387                 }
4388                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4389                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4390         } else {
4391                 print "<div class=\"page_nav\">\n" .
4392                       "<br/><br/></div>\n" .
4393                       "<div class=\"title\">$hash</div>\n";
4394         }
4395         git_print_page_path($file_name, "blob", $hash_base);
4396         print "<div class=\"page_body\">\n";
4397         if ($mimetype =~ m!^image/!) {
4398                 print qq!<img type="$mimetype"!;
4399                 if ($file_name) {
4400                         print qq! alt="$file_name" title="$file_name"!;
4401                 }
4402                 print qq! src="! .
4403                       href(action=>"blob_plain", hash=>$hash,
4404                            hash_base=>$hash_base, file_name=>$file_name) .
4405                       qq!" />\n!;
4406         } else {
4407                 my $nr;
4408                 while (my $line = <$fd>) {
4409                         chomp $line;
4410                         $nr++;
4411                         $line = untabify($line);
4412                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4413                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4414                 }
4415         }
4416         close $fd
4417                 or print "Reading blob failed.\n";
4418         print "</div>";
4419         git_footer_html();
4420 }
4421
4422 sub git_tree {
4423         if (!defined $hash_base) {
4424                 $hash_base = "HEAD";
4425         }
4426         if (!defined $hash) {
4427                 if (defined $file_name) {
4428                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4429                 } else {
4430                         $hash = $hash_base;
4431                 }
4432         }
4433         $/ = "\0";
4434         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4435                 or die_error(undef, "Open git-ls-tree failed");
4436         my @entries = map { chomp; $_ } <$fd>;
4437         close $fd or die_error(undef, "Reading tree failed");
4438         $/ = "\n";
4439
4440         my $refs = git_get_references();
4441         my $ref = format_ref_marker($refs, $hash_base);
4442         git_header_html();
4443         my $basedir = '';
4444         my ($have_blame) = gitweb_check_feature('blame');
4445         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4446                 my @views_nav = ();
4447                 if (defined $file_name) {
4448                         push @views_nav,
4449                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4450                                         "history"),
4451                                 $cgi->a({-href => href(action=>"tree",
4452                                                        hash_base=>"HEAD", file_name=>$file_name)},
4453                                         "HEAD"),
4454                 }
4455                 my $snapshot_links = format_snapshot_links($hash);
4456                 if (defined $snapshot_links) {
4457                         # FIXME: Should be available when we have no hash base as well.
4458                         push @views_nav, $snapshot_links;
4459                 }
4460                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4461                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4462         } else {
4463                 undef $hash_base;
4464                 print "<div class=\"page_nav\">\n";
4465                 print "<br/><br/></div>\n";
4466                 print "<div class=\"title\">$hash</div>\n";
4467         }
4468         if (defined $file_name) {
4469                 $basedir = $file_name;
4470                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4471                         $basedir .= '/';
4472                 }
4473         }
4474         git_print_page_path($file_name, 'tree', $hash_base);
4475         print "<div class=\"page_body\">\n";
4476         print "<table class=\"tree\">\n";
4477         my $alternate = 1;
4478         # '..' (top directory) link if possible
4479         if (defined $hash_base &&
4480             defined $file_name && $file_name =~ m![^/]+$!) {
4481                 if ($alternate) {
4482                         print "<tr class=\"dark\">\n";
4483                 } else {
4484                         print "<tr class=\"light\">\n";
4485                 }
4486                 $alternate ^= 1;
4487
4488                 my $up = $file_name;
4489                 $up =~ s!/?[^/]+$!!;
4490                 undef $up unless $up;
4491                 # based on git_print_tree_entry
4492                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4493                 print '<td class="list">';
4494                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4495                                              file_name=>$up)},
4496                               "..");
4497                 print "</td>\n";
4498                 print "<td class=\"link\"></td>\n";
4499
4500                 print "</tr>\n";
4501         }
4502         foreach my $line (@entries) {
4503                 my %t = parse_ls_tree_line($line, -z => 1);
4504
4505                 if ($alternate) {
4506                         print "<tr class=\"dark\">\n";
4507                 } else {
4508                         print "<tr class=\"light\">\n";
4509                 }
4510                 $alternate ^= 1;
4511
4512                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4513
4514                 print "</tr>\n";
4515         }
4516         print "</table>\n" .
4517               "</div>";
4518         git_footer_html();
4519 }
4520
4521 sub git_snapshot {
4522         my @supported_fmts = gitweb_check_feature('snapshot');
4523         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4524
4525         my $format = $cgi->param('sf');
4526         if (!@supported_fmts) {
4527                 die_error('403 Permission denied', "Permission denied");
4528         }
4529         # default to first supported snapshot format
4530         $format ||= $supported_fmts[0];
4531         if ($format !~ m/^[a-z0-9]+$/) {
4532                 die_error(undef, "Invalid snapshot format parameter");
4533         } elsif (!exists($known_snapshot_formats{$format})) {
4534                 die_error(undef, "Unknown snapshot format");
4535         } elsif (!grep($_ eq $format, @supported_fmts)) {
4536                 die_error(undef, "Unsupported snapshot format");
4537         }
4538
4539         if (!defined $hash) {
4540                 $hash = git_get_head_hash($project);
4541         }
4542
4543         my $git_command = git_cmd_str();
4544         my $name = $project;
4545         $name =~ s,([^/])/*\.git$,$1,;
4546         $name = basename($name);
4547         my $filename = to_utf8($name);
4548         $name =~ s/\047/\047\\\047\047/g;
4549         my $cmd;
4550         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4551         $cmd = "$git_command archive " .
4552                 "--format=$known_snapshot_formats{$format}{'format'} " .
4553                 "--prefix=\'$name\'/ $hash";
4554         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4555                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4556         }
4557
4558         print $cgi->header(
4559                 -type => $known_snapshot_formats{$format}{'type'},
4560                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4561                 -status => '200 OK');
4562
4563         open my $fd, "-|", $cmd
4564                 or die_error(undef, "Execute git-archive failed");
4565         binmode STDOUT, ':raw';
4566         print <$fd>;
4567         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4568         close $fd;
4569 }
4570
4571 sub git_log {
4572         my $head = git_get_head_hash($project);
4573         if (!defined $hash) {
4574                 $hash = $head;
4575         }
4576         if (!defined $page) {
4577                 $page = 0;
4578         }
4579         my $refs = git_get_references();
4580
4581         my @commitlist = parse_commits($hash, 101, (100 * $page));
4582
4583         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4584
4585         git_header_html();
4586         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4587
4588         if (!@commitlist) {
4589                 my %co = parse_commit($hash);
4590
4591                 git_print_header_div('summary', $project);
4592                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4593         }
4594         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4595         for (my $i = 0; $i <= $to; $i++) {
4596                 my %co = %{$commitlist[$i]};
4597                 next if !%co;
4598                 my $commit = $co{'id'};
4599                 my $ref = format_ref_marker($refs, $commit);
4600                 my %ad = parse_date($co{'author_epoch'});
4601                 git_print_header_div('commit',
4602                                "<span class=\"age\">$co{'age_string'}</span>" .
4603                                esc_html($co{'title'}) . $ref,
4604                                $commit);
4605                 print "<div class=\"title_text\">\n" .
4606                       "<div class=\"log_link\">\n" .
4607                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4608                       " | " .
4609                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4610                       " | " .
4611                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4612                       "<br/>\n" .
4613                       "</div>\n" .
4614                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4615                       "</div>\n";
4616
4617                 print "<div class=\"log_body\">\n";
4618                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4619                 print "</div>\n";
4620         }
4621         if ($#commitlist >= 100) {
4622                 print "<div class=\"page_nav\">\n";
4623                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4624                                -accesskey => "n", -title => "Alt-n"}, "next");
4625                 print "</div>\n";
4626         }
4627         git_footer_html();
4628 }
4629
4630 sub git_commit {
4631         $hash ||= $hash_base || "HEAD";
4632         my %co = parse_commit($hash);
4633         if (!%co) {
4634                 die_error(undef, "Unknown commit object");
4635         }
4636         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4637         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4638
4639         my $parent  = $co{'parent'};
4640         my $parents = $co{'parents'}; # listref
4641
4642         # we need to prepare $formats_nav before any parameter munging
4643         my $formats_nav;
4644         if (!defined $parent) {
4645                 # --root commitdiff
4646                 $formats_nav .= '(initial)';
4647         } elsif (@$parents == 1) {
4648                 # single parent commit
4649                 $formats_nav .=
4650                         '(parent: ' .
4651                         $cgi->a({-href => href(action=>"commit",
4652                                                hash=>$parent)},
4653                                 esc_html(substr($parent, 0, 7))) .
4654                         ')';
4655         } else {
4656                 # merge commit
4657                 $formats_nav .=
4658                         '(merge: ' .
4659                         join(' ', map {
4660                                 $cgi->a({-href => href(action=>"commit",
4661                                                        hash=>$_)},
4662                                         esc_html(substr($_, 0, 7)));
4663                         } @$parents ) .
4664                         ')';
4665         }
4666
4667         if (!defined $parent) {
4668                 $parent = "--root";
4669         }
4670         my @difftree;
4671         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4672                 @diff_opts,
4673                 (@$parents <= 1 ? $parent : '-c'),
4674                 $hash, "--"
4675                 or die_error(undef, "Open git-diff-tree failed");
4676         @difftree = map { chomp; $_ } <$fd>;
4677         close $fd or die_error(undef, "Reading git-diff-tree failed");
4678
4679         # non-textual hash id's can be cached
4680         my $expires;
4681         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4682                 $expires = "+1d";
4683         }
4684         my $refs = git_get_references();
4685         my $ref = format_ref_marker($refs, $co{'id'});
4686
4687         git_header_html(undef, $expires);
4688         git_print_page_nav('commit', '',
4689                            $hash, $co{'tree'}, $hash,
4690                            $formats_nav);
4691
4692         if (defined $co{'parent'}) {
4693                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4694         } else {
4695                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4696         }
4697         print "<div class=\"title_text\">\n" .
4698               "<table class=\"object_header\">\n";
4699         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4700               "<tr>" .
4701               "<td></td><td> $ad{'rfc2822'}";
4702         if ($ad{'hour_local'} < 6) {
4703                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4704                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4705         } else {
4706                 printf(" (%02d:%02d %s)",
4707                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4708         }
4709         print "</td>" .
4710               "</tr>\n";
4711         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4712         print "<tr><td></td><td> $cd{'rfc2822'}" .
4713               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4714               "</td></tr>\n";
4715         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4716         print "<tr>" .
4717               "<td>tree</td>" .
4718               "<td class=\"sha1\">" .
4719               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4720                        class => "list"}, $co{'tree'}) .
4721               "</td>" .
4722               "<td class=\"link\">" .
4723               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4724                       "tree");
4725         my $snapshot_links = format_snapshot_links($hash);
4726         if (defined $snapshot_links) {
4727                 print " | " . $snapshot_links;
4728         }
4729         print "</td>" .
4730               "</tr>\n";
4731
4732         foreach my $par (@$parents) {
4733                 print "<tr>" .
4734                       "<td>parent</td>" .
4735                       "<td class=\"sha1\">" .
4736                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4737                                class => "list"}, $par) .
4738                       "</td>" .
4739                       "<td class=\"link\">" .
4740                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4741                       " | " .
4742                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4743                       "</td>" .
4744                       "</tr>\n";
4745         }
4746         print "</table>".
4747               "</div>\n";
4748
4749         print "<div class=\"page_body\">\n";
4750         git_print_log($co{'comment'});
4751         print "</div>\n";
4752
4753         git_difftree_body(\@difftree, $hash, @$parents);
4754
4755         git_footer_html();
4756 }
4757
4758 sub git_object {
4759         # object is defined by:
4760         # - hash or hash_base alone
4761         # - hash_base and file_name
4762         my $type;
4763
4764         # - hash or hash_base alone
4765         if ($hash || ($hash_base && !defined $file_name)) {
4766                 my $object_id = $hash || $hash_base;
4767
4768                 my $git_command = git_cmd_str();
4769                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4770                         or die_error('404 Not Found', "Object does not exist");
4771                 $type = <$fd>;
4772                 chomp $type;
4773                 close $fd
4774                         or die_error('404 Not Found', "Object does not exist");
4775
4776         # - hash_base and file_name
4777         } elsif ($hash_base && defined $file_name) {
4778                 $file_name =~ s,/+$,,;
4779
4780                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4781                         or die_error('404 Not Found', "Base object does not exist");
4782
4783                 # here errors should not hapen
4784                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4785                         or die_error(undef, "Open git-ls-tree failed");
4786                 my $line = <$fd>;
4787                 close $fd;
4788
4789                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4790                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4791                         die_error('404 Not Found', "File or directory for given base does not exist");
4792                 }
4793                 $type = $2;
4794                 $hash = $3;
4795         } else {
4796                 die_error('404 Not Found', "Not enough information to find object");
4797         }
4798
4799         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4800                                           hash=>$hash, hash_base=>$hash_base,
4801                                           file_name=>$file_name),
4802                              -status => '302 Found');
4803 }
4804
4805 sub git_blobdiff {
4806         my $format = shift || 'html';
4807
4808         my $fd;
4809         my @difftree;
4810         my %diffinfo;
4811         my $expires;
4812
4813         # preparing $fd and %diffinfo for git_patchset_body
4814         # new style URI
4815         if (defined $hash_base && defined $hash_parent_base) {
4816                 if (defined $file_name) {
4817                         # read raw output
4818                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4819                                 $hash_parent_base, $hash_base,
4820                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4821                                 or die_error(undef, "Open git-diff-tree failed");
4822                         @difftree = map { chomp; $_ } <$fd>;
4823                         close $fd
4824                                 or die_error(undef, "Reading git-diff-tree failed");
4825                         @difftree
4826                                 or die_error('404 Not Found', "Blob diff not found");
4827
4828                 } elsif (defined $hash &&
4829                          $hash =~ /[0-9a-fA-F]{40}/) {
4830                         # try to find filename from $hash
4831
4832                         # read filtered raw output
4833                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4834                                 $hash_parent_base, $hash_base, "--"
4835                                 or die_error(undef, "Open git-diff-tree failed");
4836                         @difftree =
4837                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4838                                 # $hash == to_id
4839                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4840                                 map { chomp; $_ } <$fd>;
4841                         close $fd
4842                                 or die_error(undef, "Reading git-diff-tree failed");
4843                         @difftree
4844                                 or die_error('404 Not Found', "Blob diff not found");
4845
4846                 } else {
4847                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4848                 }
4849
4850                 if (@difftree > 1) {
4851                         die_error('404 Not Found', "Ambiguous blob diff specification");
4852                 }
4853
4854                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4855                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4856                 $file_name   ||= $diffinfo{'to_file'};
4857
4858                 $hash_parent ||= $diffinfo{'from_id'};
4859                 $hash        ||= $diffinfo{'to_id'};
4860
4861                 # non-textual hash id's can be cached
4862                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4863                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4864                         $expires = '+1d';
4865                 }
4866
4867                 # open patch output
4868                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4869                         '-p', ($format eq 'html' ? "--full-index" : ()),
4870                         $hash_parent_base, $hash_base,
4871                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4872                         or die_error(undef, "Open git-diff-tree failed");
4873         }
4874
4875         # old/legacy style URI
4876         if (!%diffinfo && # if new style URI failed
4877             defined $hash && defined $hash_parent) {
4878                 # fake git-diff-tree raw output
4879                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4880                 $diffinfo{'from_id'} = $hash_parent;
4881                 $diffinfo{'to_id'}   = $hash;
4882                 if (defined $file_name) {
4883                         if (defined $file_parent) {
4884                                 $diffinfo{'status'} = '2';
4885                                 $diffinfo{'from_file'} = $file_parent;
4886                                 $diffinfo{'to_file'}   = $file_name;
4887                         } else { # assume not renamed
4888                                 $diffinfo{'status'} = '1';
4889                                 $diffinfo{'from_file'} = $file_name;
4890                                 $diffinfo{'to_file'}   = $file_name;
4891                         }
4892                 } else { # no filename given
4893                         $diffinfo{'status'} = '2';
4894                         $diffinfo{'from_file'} = $hash_parent;
4895                         $diffinfo{'to_file'}   = $hash;
4896                 }
4897
4898                 # non-textual hash id's can be cached
4899                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4900                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4901                         $expires = '+1d';
4902                 }
4903
4904                 # open patch output
4905                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4906                         '-p', ($format eq 'html' ? "--full-index" : ()),
4907                         $hash_parent, $hash, "--"
4908                         or die_error(undef, "Open git-diff failed");
4909         } else  {
4910                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4911                         unless %diffinfo;
4912         }
4913
4914         # header
4915         if ($format eq 'html') {
4916                 my $formats_nav =
4917                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4918                                 "raw");
4919                 git_header_html(undef, $expires);
4920                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4921                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4922                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4923                 } else {
4924                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4925                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4926                 }
4927                 if (defined $file_name) {
4928                         git_print_page_path($file_name, "blob", $hash_base);
4929                 } else {
4930                         print "<div class=\"page_path\"></div>\n";
4931                 }
4932
4933         } elsif ($format eq 'plain') {
4934                 print $cgi->header(
4935                         -type => 'text/plain',
4936                         -charset => 'utf-8',
4937                         -expires => $expires,
4938                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4939
4940                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4941
4942         } else {
4943                 die_error(undef, "Unknown blobdiff format");
4944         }
4945
4946         # patch
4947         if ($format eq 'html') {
4948                 print "<div class=\"page_body\">\n";
4949
4950                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4951                 close $fd;
4952
4953                 print "</div>\n"; # class="page_body"
4954                 git_footer_html();
4955
4956         } else {
4957                 while (my $line = <$fd>) {
4958                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4959                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4960
4961                         print $line;
4962
4963                         last if $line =~ m!^\+\+\+!;
4964                 }
4965                 local $/ = undef;
4966                 print <$fd>;
4967                 close $fd;
4968         }
4969 }
4970
4971 sub git_blobdiff_plain {
4972         git_blobdiff('plain');
4973 }
4974
4975 sub git_commitdiff {
4976         my $format = shift || 'html';
4977         $hash ||= $hash_base || "HEAD";
4978         my %co = parse_commit($hash);
4979         if (!%co) {
4980                 die_error(undef, "Unknown commit object");
4981         }
4982
4983         # choose format for commitdiff for merge
4984         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4985                 $hash_parent = '--cc';
4986         }
4987         # we need to prepare $formats_nav before almost any parameter munging
4988         my $formats_nav;
4989         if ($format eq 'html') {
4990                 $formats_nav =
4991                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4992                                 "raw");
4993
4994                 if (defined $hash_parent &&
4995                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4996                         # commitdiff with two commits given
4997                         my $hash_parent_short = $hash_parent;
4998                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4999                                 $hash_parent_short = substr($hash_parent, 0, 7);
5000                         }
5001                         $formats_nav .=
5002                                 ' (from';
5003                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5004                                 if ($co{'parents'}[$i] eq $hash_parent) {
5005                                         $formats_nav .= ' parent ' . ($i+1);
5006                                         last;
5007                                 }
5008                         }
5009                         $formats_nav .= ': ' .
5010                                 $cgi->a({-href => href(action=>"commitdiff",
5011                                                        hash=>$hash_parent)},
5012                                         esc_html($hash_parent_short)) .
5013                                 ')';
5014                 } elsif (!$co{'parent'}) {
5015                         # --root commitdiff
5016                         $formats_nav .= ' (initial)';
5017                 } elsif (scalar @{$co{'parents'}} == 1) {
5018                         # single parent commit
5019                         $formats_nav .=
5020                                 ' (parent: ' .
5021                                 $cgi->a({-href => href(action=>"commitdiff",
5022                                                        hash=>$co{'parent'})},
5023                                         esc_html(substr($co{'parent'}, 0, 7))) .
5024                                 ')';
5025                 } else {
5026                         # merge commit
5027                         if ($hash_parent eq '--cc') {
5028                                 $formats_nav .= ' | ' .
5029                                         $cgi->a({-href => href(action=>"commitdiff",
5030                                                                hash=>$hash, hash_parent=>'-c')},
5031                                                 'combined');
5032                         } else { # $hash_parent eq '-c'
5033                                 $formats_nav .= ' | ' .
5034                                         $cgi->a({-href => href(action=>"commitdiff",
5035                                                                hash=>$hash, hash_parent=>'--cc')},
5036                                                 'compact');
5037                         }
5038                         $formats_nav .=
5039                                 ' (merge: ' .
5040                                 join(' ', map {
5041                                         $cgi->a({-href => href(action=>"commitdiff",
5042                                                                hash=>$_)},
5043                                                 esc_html(substr($_, 0, 7)));
5044                                 } @{$co{'parents'}} ) .
5045                                 ')';
5046                 }
5047         }
5048
5049         my $hash_parent_param = $hash_parent;
5050         if (!defined $hash_parent_param) {
5051                 # --cc for multiple parents, --root for parentless
5052                 $hash_parent_param =
5053                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5054         }
5055
5056         # read commitdiff
5057         my $fd;
5058         my @difftree;
5059         if ($format eq 'html') {
5060                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5061                         "--no-commit-id", "--patch-with-raw", "--full-index",
5062                         $hash_parent_param, $hash, "--"
5063                         or die_error(undef, "Open git-diff-tree failed");
5064
5065                 while (my $line = <$fd>) {
5066                         chomp $line;
5067                         # empty line ends raw part of diff-tree output
5068                         last unless $line;
5069                         push @difftree, scalar parse_difftree_raw_line($line);
5070                 }
5071
5072         } elsif ($format eq 'plain') {
5073                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5074                         '-p', $hash_parent_param, $hash, "--"
5075                         or die_error(undef, "Open git-diff-tree failed");
5076
5077         } else {
5078                 die_error(undef, "Unknown commitdiff format");
5079         }
5080
5081         # non-textual hash id's can be cached
5082         my $expires;
5083         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5084                 $expires = "+1d";
5085         }
5086
5087         # write commit message
5088         if ($format eq 'html') {
5089                 my $refs = git_get_references();
5090                 my $ref = format_ref_marker($refs, $co{'id'});
5091
5092                 git_header_html(undef, $expires);
5093                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5094                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5095                 git_print_authorship(\%co);
5096                 print "<div class=\"page_body\">\n";
5097                 if (@{$co{'comment'}} > 1) {
5098                         print "<div class=\"log\">\n";
5099                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5100                         print "</div>\n"; # class="log"
5101                 }
5102
5103         } elsif ($format eq 'plain') {
5104                 my $refs = git_get_references("tags");
5105                 my $tagname = git_get_rev_name_tags($hash);
5106                 my $filename = basename($project) . "-$hash.patch";
5107
5108                 print $cgi->header(
5109                         -type => 'text/plain',
5110                         -charset => 'utf-8',
5111                         -expires => $expires,
5112                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5113                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5114                 print "From: " . to_utf8($co{'author'}) . "\n";
5115                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5116                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5117
5118                 print "X-Git-Tag: $tagname\n" if $tagname;
5119                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5120
5121                 foreach my $line (@{$co{'comment'}}) {
5122                         print to_utf8($line) . "\n";
5123                 }
5124                 print "---\n\n";
5125         }
5126
5127         # write patch
5128         if ($format eq 'html') {
5129                 my $use_parents = !defined $hash_parent ||
5130                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5131                 git_difftree_body(\@difftree, $hash,
5132                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5133                 print "<br/>\n";
5134
5135                 git_patchset_body($fd, \@difftree, $hash,
5136                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5137                 close $fd;
5138                 print "</div>\n"; # class="page_body"
5139                 git_footer_html();
5140
5141         } elsif ($format eq 'plain') {
5142                 local $/ = undef;
5143                 print <$fd>;
5144                 close $fd
5145                         or print "Reading git-diff-tree failed\n";
5146         }
5147 }
5148
5149 sub git_commitdiff_plain {
5150         git_commitdiff('plain');
5151 }
5152
5153 sub git_history {
5154         if (!defined $hash_base) {
5155                 $hash_base = git_get_head_hash($project);
5156         }
5157         if (!defined $page) {
5158                 $page = 0;
5159         }
5160         my $ftype;
5161         my %co = parse_commit($hash_base);
5162         if (!%co) {
5163                 die_error(undef, "Unknown commit object");
5164         }
5165
5166         my $refs = git_get_references();
5167         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5168
5169         if (!defined $hash && defined $file_name) {
5170                 $hash = git_get_hash_by_path($hash_base, $file_name);
5171         }
5172         if (defined $hash) {
5173                 $ftype = git_get_type($hash);
5174         }
5175
5176         my @commitlist = parse_commits($hash_base, 101, (100 * $page), $file_name, "--full-history");
5177
5178         my $paging_nav = '';
5179         if ($page > 0) {
5180                 $paging_nav .=
5181                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5182                                                file_name=>$file_name)},
5183                                 "first");
5184                 $paging_nav .= " &sdot; " .
5185                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5186                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5187         } else {
5188                 $paging_nav .= "first";
5189                 $paging_nav .= " &sdot; prev";
5190         }
5191         my $next_link = '';
5192         if ($#commitlist >= 100) {
5193                 $next_link =
5194                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5195                                  -accesskey => "n", -title => "Alt-n"}, "next");
5196                 $paging_nav .= " &sdot; $next_link";
5197         } else {
5198                 $paging_nav .= " &sdot; next";
5199         }
5200
5201         git_header_html();
5202         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5203         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5204         git_print_page_path($file_name, $ftype, $hash_base);
5205
5206         git_history_body(\@commitlist, 0, 99,
5207                          $refs, $hash_base, $ftype, $next_link);
5208
5209         git_footer_html();
5210 }
5211
5212 sub git_search {
5213         my ($have_search) = gitweb_check_feature('search');
5214         if (!$have_search) {
5215                 die_error('403 Permission denied', "Permission denied");
5216         }
5217         if (!defined $searchtext) {
5218                 die_error(undef, "Text field empty");
5219         }
5220         if (!defined $hash) {
5221                 $hash = git_get_head_hash($project);
5222         }
5223         my %co = parse_commit($hash);
5224         if (!%co) {
5225                 die_error(undef, "Unknown commit object");
5226         }
5227         if (!defined $page) {
5228                 $page = 0;
5229         }
5230
5231         $searchtype ||= 'commit';
5232         if ($searchtype eq 'pickaxe') {
5233                 # pickaxe may take all resources of your box and run for several minutes
5234                 # with every query - so decide by yourself how public you make this feature
5235                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5236                 if (!$have_pickaxe) {
5237                         die_error('403 Permission denied', "Permission denied");
5238                 }
5239         }
5240         if ($searchtype eq 'grep') {
5241                 my ($have_grep) = gitweb_check_feature('grep');
5242                 if (!$have_grep) {
5243                         die_error('403 Permission denied', "Permission denied");
5244                 }
5245         }
5246
5247         git_header_html();
5248
5249         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5250                 my $greptype;
5251                 if ($searchtype eq 'commit') {
5252                         $greptype = "--grep=";
5253                 } elsif ($searchtype eq 'author') {
5254                         $greptype = "--author=";
5255                 } elsif ($searchtype eq 'committer') {
5256                         $greptype = "--committer=";
5257                 }
5258                 $greptype .= $search_regexp;
5259                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef, $greptype);
5260
5261                 my $paging_nav = '';
5262                 if ($page > 0) {
5263                         $paging_nav .=
5264                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5265                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5266                                         "first");
5267                         $paging_nav .= " &sdot; " .
5268                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5269                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5270                 } else {
5271                         $paging_nav .= "first";
5272                         $paging_nav .= " &sdot; prev";
5273                 }
5274                 my $next_link = '';
5275                 if ($#commitlist >= 100) {
5276                         $next_link =
5277                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5278                                          -accesskey => "n", -title => "Alt-n"}, "next");
5279                         $paging_nav .= " &sdot; $next_link";
5280                 } else {
5281                         $paging_nav .= " &sdot; next";
5282                 }
5283
5284                 if ($#commitlist >= 100) {
5285                 }
5286
5287                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5288                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5289                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5290         }
5291
5292         if ($searchtype eq 'pickaxe') {
5293                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5294                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5295
5296                 print "<table class=\"pickaxe search\">\n";
5297                 my $alternate = 1;
5298                 $/ = "\n";
5299                 my $git_command = git_cmd_str();
5300                 my $searchqtext = $searchtext;
5301                 $searchqtext =~ s/'/'\\''/;
5302                 open my $fd, "-|", "$git_command rev-list $hash | " .
5303                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5304                 undef %co;
5305                 my @files;
5306                 while (my $line = <$fd>) {
5307                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5308                                 my %set;
5309                                 $set{'file'} = $6;
5310                                 $set{'from_id'} = $3;
5311                                 $set{'to_id'} = $4;
5312                                 $set{'id'} = $set{'to_id'};
5313                                 if ($set{'id'} =~ m/0{40}/) {
5314                                         $set{'id'} = $set{'from_id'};
5315                                 }
5316                                 if ($set{'id'} =~ m/0{40}/) {
5317                                         next;
5318                                 }
5319                                 push @files, \%set;
5320                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5321                                 if (%co) {
5322                                         if ($alternate) {
5323                                                 print "<tr class=\"dark\">\n";
5324                                         } else {
5325                                                 print "<tr class=\"light\">\n";
5326                                         }
5327                                         $alternate ^= 1;
5328                                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5329                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5330                                               "<td><i>" . $author . "</i></td>\n" .
5331                                               "<td>" .
5332                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5333                                                       -class => "list subject"},
5334                                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5335                                         while (my $setref = shift @files) {
5336                                                 my %set = %$setref;
5337                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5338                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5339                                                               -class => "list"},
5340                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5341                                                       "<br/>\n";
5342                                         }
5343                                         print "</td>\n" .
5344                                               "<td class=\"link\">" .
5345                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5346                                               " | " .
5347                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5348                                         print "</td>\n" .
5349                                               "</tr>\n";
5350                                 }
5351                                 %co = parse_commit($1);
5352                         }
5353                 }
5354                 close $fd;
5355
5356                 print "</table>\n";
5357         }
5358
5359         if ($searchtype eq 'grep') {
5360                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5361                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5362
5363                 print "<table class=\"grep_search\">\n";
5364                 my $alternate = 1;
5365                 my $matches = 0;
5366                 $/ = "\n";
5367                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5368                 my $lastfile = '';
5369                 while (my $line = <$fd>) {
5370                         chomp $line;
5371                         my ($file, $lno, $ltext, $binary);
5372                         last if ($matches++ > 1000);
5373                         if ($line =~ /^Binary file (.+) matches$/) {
5374                                 $file = $1;
5375                                 $binary = 1;
5376                         } else {
5377                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5378                         }
5379                         if ($file ne $lastfile) {
5380                                 $lastfile and print "</td></tr>\n";
5381                                 if ($alternate++) {
5382                                         print "<tr class=\"dark\">\n";
5383                                 } else {
5384                                         print "<tr class=\"light\">\n";
5385                                 }
5386                                 print "<td class=\"list\">".
5387                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5388                                                                file_name=>"$file"),
5389                                                 -class => "list"}, esc_path($file));
5390                                 print "</td><td>\n";
5391                                 $lastfile = $file;
5392                         }
5393                         if ($binary) {
5394                                 print "<div class=\"binary\">Binary file</div>\n";
5395                         } else {
5396                                 $ltext = untabify($ltext);
5397                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5398                                         $ltext = esc_html($1, -nbsp=>1);
5399                                         $ltext .= '<span class="match">';
5400                                         $ltext .= esc_html($2, -nbsp=>1);
5401                                         $ltext .= '</span>';
5402                                         $ltext .= esc_html($3, -nbsp=>1);
5403                                 } else {
5404                                         $ltext = esc_html($ltext, -nbsp=>1);
5405                                 }
5406                                 print "<div class=\"pre\">" .
5407                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5408                                                                file_name=>"$file").'#l'.$lno,
5409                                                 -class => "linenr"}, sprintf('%4i', $lno))
5410                                         . ' ' .  $ltext . "</div>\n";
5411                         }
5412                 }
5413                 if ($lastfile) {
5414                         print "</td></tr>\n";
5415                         if ($matches > 1000) {
5416                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5417                         }
5418                 } else {
5419                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5420                 }
5421                 close $fd;
5422
5423                 print "</table>\n";
5424         }
5425         git_footer_html();
5426 }
5427
5428 sub git_search_help {
5429         git_header_html();
5430         git_print_page_nav('','', $hash,$hash,$hash);
5431         print <<EOT;
5432 <dl>
5433 <dt><b>commit</b></dt>
5434 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5435 EOT
5436         my ($have_grep) = gitweb_check_feature('grep');
5437         if ($have_grep) {
5438                 print <<EOT;
5439 <dt><b>grep</b></dt>
5440 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5441     a different one) are searched for the given
5442 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5443 (POSIX extended) and the matches are listed. On large
5444 trees, this search can take a while and put some strain on the server, so please use it with
5445 some consideration.</dd>
5446 EOT
5447         }
5448         print <<EOT;
5449 <dt><b>author</b></dt>
5450 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5451 <dt><b>committer</b></dt>
5452 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5453 EOT
5454         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5455         if ($have_pickaxe) {
5456                 print <<EOT;
5457 <dt><b>pickaxe</b></dt>
5458 <dd>All commits that caused the string to appear or disappear from any file (changes that
5459 added, removed or "modified" the string) will be listed. This search can take a while and
5460 takes a lot of strain on the server, so please use it wisely.</dd>
5461 EOT
5462         }
5463         print "</dl>\n";
5464         git_footer_html();
5465 }
5466
5467 sub git_shortlog {
5468         my $head = git_get_head_hash($project);
5469         if (!defined $hash) {
5470                 $hash = $head;
5471         }
5472         if (!defined $page) {
5473                 $page = 0;
5474         }
5475         my $refs = git_get_references();
5476
5477         my @commitlist = parse_commits($hash, 101, (100 * $page));
5478
5479         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5480         my $next_link = '';
5481         if ($#commitlist >= 100) {
5482                 $next_link =
5483                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5484                                  -accesskey => "n", -title => "Alt-n"}, "next");
5485         }
5486
5487         git_header_html();
5488         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5489         git_print_header_div('summary', $project);
5490
5491         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5492
5493         git_footer_html();
5494 }
5495
5496 ## ......................................................................
5497 ## feeds (RSS, Atom; OPML)
5498
5499 sub git_feed {
5500         my $format = shift || 'atom';
5501         my ($have_blame) = gitweb_check_feature('blame');
5502
5503         # Atom: http://www.atomenabled.org/developers/syndication/
5504         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5505         if ($format ne 'rss' && $format ne 'atom') {
5506                 die_error(undef, "Unknown web feed format");
5507         }
5508
5509         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5510         my $head = $hash || 'HEAD';
5511         my @commitlist = parse_commits($head, 150, 0, $file_name);
5512
5513         my %latest_commit;
5514         my %latest_date;
5515         my $content_type = "application/$format+xml";
5516         if (defined $cgi->http('HTTP_ACCEPT') &&
5517                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5518                 # browser (feed reader) prefers text/xml
5519                 $content_type = 'text/xml';
5520         }
5521         if (defined($commitlist[0])) {
5522                 %latest_commit = %{$commitlist[0]};
5523                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5524                 print $cgi->header(
5525                         -type => $content_type,
5526                         -charset => 'utf-8',
5527                         -last_modified => $latest_date{'rfc2822'});
5528         } else {
5529                 print $cgi->header(
5530                         -type => $content_type,
5531                         -charset => 'utf-8');
5532         }
5533
5534         # Optimization: skip generating the body if client asks only
5535         # for Last-Modified date.
5536         return if ($cgi->request_method() eq 'HEAD');
5537
5538         # header variables
5539         my $title = "$site_name - $project/$action";
5540         my $feed_type = 'log';
5541         if (defined $hash) {
5542                 $title .= " - '$hash'";
5543                 $feed_type = 'branch log';
5544                 if (defined $file_name) {
5545                         $title .= " :: $file_name";
5546                         $feed_type = 'history';
5547                 }
5548         } elsif (defined $file_name) {
5549                 $title .= " - $file_name";
5550                 $feed_type = 'history';
5551         }
5552         $title .= " $feed_type";
5553         my $descr = git_get_project_description($project);
5554         if (defined $descr) {
5555                 $descr = esc_html($descr);
5556         } else {
5557                 $descr = "$project " .
5558                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5559                          " feed";
5560         }
5561         my $owner = git_get_project_owner($project);
5562         $owner = esc_html($owner);
5563
5564         #header
5565         my $alt_url;
5566         if (defined $file_name) {
5567                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5568         } elsif (defined $hash) {
5569                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5570         } else {
5571                 $alt_url = href(-full=>1, action=>"summary");
5572         }
5573         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5574         if ($format eq 'rss') {
5575                 print <<XML;
5576 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5577 <channel>
5578 XML
5579                 print "<title>$title</title>\n" .
5580                       "<link>$alt_url</link>\n" .
5581                       "<description>$descr</description>\n" .
5582                       "<language>en</language>\n";
5583         } elsif ($format eq 'atom') {
5584                 print <<XML;
5585 <feed xmlns="http://www.w3.org/2005/Atom">
5586 XML
5587                 print "<title>$title</title>\n" .
5588                       "<subtitle>$descr</subtitle>\n" .
5589                       '<link rel="alternate" type="text/html" href="' .
5590                       $alt_url . '" />' . "\n" .
5591                       '<link rel="self" type="' . $content_type . '" href="' .
5592                       $cgi->self_url() . '" />' . "\n" .
5593                       "<id>" . href(-full=>1) . "</id>\n" .
5594                       # use project owner for feed author
5595                       "<author><name>$owner</name></author>\n";
5596                 if (defined $favicon) {
5597                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5598                 }
5599                 if (defined $logo_url) {
5600                         # not twice as wide as tall: 72 x 27 pixels
5601                         print "<logo>" . esc_url($logo) . "</logo>\n";
5602                 }
5603                 if (! %latest_date) {
5604                         # dummy date to keep the feed valid until commits trickle in:
5605                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5606                 } else {
5607                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5608                 }
5609         }
5610
5611         # contents
5612         for (my $i = 0; $i <= $#commitlist; $i++) {
5613                 my %co = %{$commitlist[$i]};
5614                 my $commit = $co{'id'};
5615                 # we read 150, we always show 30 and the ones more recent than 48 hours
5616                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5617                         last;
5618                 }
5619                 my %cd = parse_date($co{'author_epoch'});
5620
5621                 # get list of changed files
5622                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5623                         $co{'parent'} || "--root",
5624                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5625                         or next;
5626                 my @difftree = map { chomp; $_ } <$fd>;
5627                 close $fd
5628                         or next;
5629
5630                 # print element (entry, item)
5631                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5632                 if ($format eq 'rss') {
5633                         print "<item>\n" .
5634                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5635                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5636                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5637                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5638                               "<link>$co_url</link>\n" .
5639                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5640                               "<content:encoded>" .
5641                               "<![CDATA[\n";
5642                 } elsif ($format eq 'atom') {
5643                         print "<entry>\n" .
5644                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5645                               "<updated>$cd{'iso-8601'}</updated>\n" .
5646                               "<author>\n" .
5647                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5648                         if ($co{'author_email'}) {
5649                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5650                         }
5651                         print "</author>\n" .
5652                               # use committer for contributor
5653                               "<contributor>\n" .
5654                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5655                         if ($co{'committer_email'}) {
5656                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5657                         }
5658                         print "</contributor>\n" .
5659                               "<published>$cd{'iso-8601'}</published>\n" .
5660                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5661                               "<id>$co_url</id>\n" .
5662                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5663                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5664                 }
5665                 my $comment = $co{'comment'};
5666                 print "<pre>\n";
5667                 foreach my $line (@$comment) {
5668                         $line = esc_html($line);
5669                         print "$line\n";
5670                 }
5671                 print "</pre><ul>\n";
5672                 foreach my $difftree_line (@difftree) {
5673                         my %difftree = parse_difftree_raw_line($difftree_line);
5674                         next if !$difftree{'from_id'};
5675
5676                         my $file = $difftree{'file'} || $difftree{'to_file'};
5677
5678                         print "<li>" .
5679                               "[" .
5680                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5681                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5682                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5683                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5684                                       -title => "diff"}, 'D');
5685                         if ($have_blame) {
5686                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5687                                                              file_name=>$file, hash_base=>$commit),
5688                                               -title => "blame"}, 'B');
5689                         }
5690                         # if this is not a feed of a file history
5691                         if (!defined $file_name || $file_name ne $file) {
5692                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5693                                                              file_name=>$file, hash=>$commit),
5694                                               -title => "history"}, 'H');
5695                         }
5696                         $file = esc_path($file);
5697                         print "] ".
5698                               "$file</li>\n";
5699                 }
5700                 if ($format eq 'rss') {
5701                         print "</ul>]]>\n" .
5702                               "</content:encoded>\n" .
5703                               "</item>\n";
5704                 } elsif ($format eq 'atom') {
5705                         print "</ul>\n</div>\n" .
5706                               "</content>\n" .
5707                               "</entry>\n";
5708                 }
5709         }
5710
5711         # end of feed
5712         if ($format eq 'rss') {
5713                 print "</channel>\n</rss>\n";
5714         }       elsif ($format eq 'atom') {
5715                 print "</feed>\n";
5716         }
5717 }
5718
5719 sub git_rss {
5720         git_feed('rss');
5721 }
5722
5723 sub git_atom {
5724         git_feed('atom');
5725 }
5726
5727 sub git_opml {
5728         my @list = git_get_projects_list();
5729
5730         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5731         print <<XML;
5732 <?xml version="1.0" encoding="utf-8"?>
5733 <opml version="1.0">
5734 <head>
5735   <title>$site_name OPML Export</title>
5736 </head>
5737 <body>
5738 <outline text="git RSS feeds">
5739 XML
5740
5741         foreach my $pr (@list) {
5742                 my %proj = %$pr;
5743                 my $head = git_get_head_hash($proj{'path'});
5744                 if (!defined $head) {
5745                         next;
5746                 }
5747                 $git_dir = "$projectroot/$proj{'path'}";
5748                 my %co = parse_commit($head);
5749                 if (!%co) {
5750                         next;
5751                 }
5752
5753                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5754                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5755                 my $html = "$my_url?p=$proj{'path'};a=summary";
5756                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5757         }
5758         print <<XML;
5759 </outline>
5760 </body>
5761 </opml>
5762 XML
5763 }