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 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  43
  44 # name of your site or organization to appear in page titles
  45 # replace this with something more descriptive for clearer bookmarks
  46 our $site_name = "++GITWEB_SITENAME++"
  47                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  48
  49 # filename of html text to include at top of each page
  50 our $site_header = "++GITWEB_SITE_HEADER++";
  51 # html text to include at home page
  52 our $home_text = "++GITWEB_HOMETEXT++";
  53 # filename of html text to include at bottom of each page
  54 our $site_footer = "++GITWEB_SITE_FOOTER++";
  55
  56 # URI of stylesheets
  57 our @stylesheets = ("++GITWEB_CSS++");
  58 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  59 our $stylesheet = undef;
  60
  61 # URI of GIT logo (72x27 size)
  62 our $logo = "++GITWEB_LOGO++";
  63 # URI of GIT favicon, assumed to be image/png type
  64 our $favicon = "++GITWEB_FAVICON++";
  65
  66 # URI and label (title) of GIT logo link
  67 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  68 #our $logo_label = "git documentation";
  69 our $logo_url = "http://git.or.cz/";
  70 our $logo_label = "git homepage";
  71
  72 # source of projects list
  73 our $projects_list = "++GITWEB_LIST++";
  74
  75 # the width (in characters) of the projects list "Description" column
  76 our $projects_list_description_width = 25;
  77
  78 # default order of projects list
  79 # valid values are none, project, descr, owner, and age
  80 our $default_projects_order = "project";
  81
  82 # show repository only if this file exists
  83 # (only effective if this variable evaluates to true)
  84 our $export_ok = "++GITWEB_EXPORT_OK++";
  85
  86 # only allow viewing of repositories also shown on the overview page
  87 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  88
  89 # list of git base URLs used for URL to where fetch project from,
  90 # i.e. full URL is "$git_base_url/$project"
  91 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  92
  93 # default blob_plain mimetype and default charset for text/plain blob
  94 our $default_blob_plain_mimetype = 'text/plain';
  95 our $default_text_plain_charset  = undef;
  96
  97 # file to use for guessing MIME types before trying /etc/mime.types
  98 # (relative to the current git repository)
  99 our $mimetypes_file = undef;
 100
 101 # assume this charset if line contains non-UTF-8 characters;
 102 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 103 # for which encoding all byte sequences are valid, for example
 104 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 105 # could be even 'utf-8' for the old behavior)
 106 our $fallback_encoding = 'latin1';
 107
 108 # rename detection options for git-diff and git-diff-tree
 109 # - default is '-M', with the cost proportional to
 110 #   (number of removed files) * (number of new files).
 111 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 112 #   (number of changed files + number of removed files) * (number of new files)
 113 # - even more costly is '-C', '--find-copies-harder' with cost
 114 #   (number of files in the original tree) * (number of new files)
 115 # - one might want to include '-B' option, e.g. '-B', '-M'
 116 our @diff_opts = ('-M'); # taken from git_commit
 117
 118 # information about snapshot formats that gitweb is capable of serving
 119 our %known_snapshot_formats = (
 120         # name => {
 121         #       'display' => display name,
 122         #       'type' => mime type,
 123         #       'suffix' => filename suffix,
 124         #       'format' => --format for git-archive,
 125         #       'compressor' => [compressor command and arguments]
 126         #                       (array reference, optional)}
 127         #
 128         'tgz' => {
 129                 'display' => 'tar.gz',
 130                 'type' => 'application/x-gzip',
 131                 'suffix' => '.tar.gz',
 132                 'format' => 'tar',
 133                 'compressor' => ['gzip']},
 134
 135         'tbz2' => {
 136                 'display' => 'tar.bz2',
 137                 'type' => 'application/x-bzip2',
 138                 'suffix' => '.tar.bz2',
 139                 'format' => 'tar',
 140                 'compressor' => ['bzip2']},
 141
 142         'zip' => {
 143                 'display' => 'zip',
 144                 'type' => 'application/x-zip',
 145                 'suffix' => '.zip',
 146                 'format' => 'zip'},
 147 );
 148
 149 # Aliases so we understand old gitweb.snapshot values in repository
 150 # configuration.
 151 our %known_snapshot_format_aliases = (
 152         'gzip'  => 'tgz',
 153         'bzip2' => 'tbz2',
 154
 155         # backward compatibility: legacy gitweb config support
 156         'x-gzip' => undef, 'gz' => undef,
 157         'x-bzip2' => undef, 'bz2' => undef,
 158         'x-zip' => undef, '' => undef,
 159 );
 160
 161 # You define site-wide feature defaults here; override them with
 162 # $GITWEB_CONFIG as necessary.
 163 our %feature = (
 164         # feature => {
 165         #       'sub' => feature-sub (subroutine),
 166         #       'override' => allow-override (boolean),
 167         #       'default' => [ default options...] (array reference)}
 168         #
 169         # if feature is overridable (it means that allow-override has true value),
 170         # then feature-sub will be called with default options as parameters;
 171         # return value of feature-sub indicates if to enable specified feature
 172         #
 173         # if there is no 'sub' key (no feature-sub), then feature cannot be
 174         # overriden
 175         #
 176         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 177
 178         # Enable the 'blame' blob view, showing the last commit that modified
 179         # each line in the file. This can be very CPU-intensive.
 180
 181         # To enable system wide have in $GITWEB_CONFIG
 182         # $feature{'blame'}{'default'} = [1];
 183         # To have project specific config enable override in $GITWEB_CONFIG
 184         # $feature{'blame'}{'override'} = 1;
 185         # and in project config gitweb.blame = 0|1;
 186         'blame' => {
 187                 'sub' => \&feature_blame,
 188                 'override' => 0,
 189                 'default' => [0]},
 190
 191         # Enable the 'snapshot' link, providing a compressed archive of any
 192         # tree. This can potentially generate high traffic if you have large
 193         # project.
 194
 195         # Value is a list of formats defined in %known_snapshot_formats that
 196         # you wish to offer.
 197         # To disable system wide have in $GITWEB_CONFIG
 198         # $feature{'snapshot'}{'default'} = [];
 199         # To have project specific config enable override in $GITWEB_CONFIG
 200         # $feature{'snapshot'}{'override'} = 1;
 201         # and in project config, a comma-separated list of formats or "none"
 202         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 203         'snapshot' => {
 204                 'sub' => \&feature_snapshot,
 205                 'override' => 0,
 206                 'default' => ['tgz']},
 207
 208         # Enable text search, which will list the commits which match author,
 209         # committer or commit text to a given string.  Enabled by default.
 210         # Project specific override is not supported.
 211         'search' => {
 212                 'override' => 0,
 213                 'default' => [1]},
 214
 215         # Enable grep search, which will list the files in currently selected
 216         # tree containing the given string. Enabled by default. This can be
 217         # potentially CPU-intensive, of course.
 218
 219         # To enable system wide have in $GITWEB_CONFIG
 220         # $feature{'grep'}{'default'} = [1];
 221         # To have project specific config enable override in $GITWEB_CONFIG
 222         # $feature{'grep'}{'override'} = 1;
 223         # and in project config gitweb.grep = 0|1;
 224         'grep' => {
 225                 'override' => 0,
 226                 'default' => [1]},
 227
 228         # Enable the pickaxe search, which will list the commits that modified
 229         # a given string in a file. This can be practical and quite faster
 230         # alternative to 'blame', but still potentially CPU-intensive.
 231
 232         # To enable system wide have in $GITWEB_CONFIG
 233         # $feature{'pickaxe'}{'default'} = [1];
 234         # To have project specific config enable override in $GITWEB_CONFIG
 235         # $feature{'pickaxe'}{'override'} = 1;
 236         # and in project config gitweb.pickaxe = 0|1;
 237         'pickaxe' => {
 238                 'sub' => \&feature_pickaxe,
 239                 'override' => 0,
 240                 'default' => [1]},
 241
 242         # Make gitweb use an alternative format of the URLs which can be
 243         # more readable and natural-looking: project name is embedded
 244         # directly in the path and the query string contains other
 245         # auxiliary information. All gitweb installations recognize
 246         # URL in either format; this configures in which formats gitweb
 247         # generates links.
 248
 249         # To enable system wide have in $GITWEB_CONFIG
 250         # $feature{'pathinfo'}{'default'} = [1];
 251         # Project specific override is not supported.
 252
 253         # Note that you will need to change the default location of CSS,
 254         # favicon, logo and possibly other files to an absolute URL. Also,
 255         # if gitweb.cgi serves as your indexfile, you will need to force
 256         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 257         'pathinfo' => {
 258                 'override' => 0,
 259                 'default' => [0]},
 260
 261         # Make gitweb consider projects in project root subdirectories
 262         # to be forks of existing projects. Given project $projname.git,
 263         # projects matching $projname/*.git will not be shown in the main
 264         # projects list, instead a '+' mark will be added to $projname
 265         # there and a 'forks' view will be enabled for the project, listing
 266         # all the forks. If project list is taken from a file, forks have
 267         # to be listed after the main project.
 268
 269         # To enable system wide have in $GITWEB_CONFIG
 270         # $feature{'forks'}{'default'} = [1];
 271         # Project specific override is not supported.
 272         'forks' => {
 273                 'override' => 0,
 274                 'default' => [0]},
 275 );
 276
 277 sub gitweb_check_feature {
 278         my ($name) = @_;
 279         return unless exists $feature{$name};
 280         my ($sub, $override, @defaults) = (
 281                 $feature{$name}{'sub'},
 282                 $feature{$name}{'override'},
 283                 @{$feature{$name}{'default'}});
 284         if (!$override) { return @defaults; }
 285         if (!defined $sub) {
 286                 warn "feature $name is not overrideable";
 287                 return @defaults;
 288         }
 289         return $sub->(@defaults);
 290 }
 291
 292 sub feature_blame {
 293         my ($val) = git_get_project_config('blame', '--bool');
 294
 295         if ($val eq 'true') {
 296                 return 1;
 297         } elsif ($val eq 'false') {
 298                 return 0;
 299         }
 300
 301         return $_[0];
 302 }
 303
 304 sub feature_snapshot {
 305         my (@fmts) = @_;
 306
 307         my ($val) = git_get_project_config('snapshot');
 308
 309         if ($val) {
 310                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 311         }
 312
 313         return @fmts;
 314 }
 315
 316 sub feature_grep {
 317         my ($val) = git_get_project_config('grep', '--bool');
 318
 319         if ($val eq 'true') {
 320                 return (1);
 321         } elsif ($val eq 'false') {
 322                 return (0);
 323         }
 324
 325         return ($_[0]);
 326 }
 327
 328 sub feature_pickaxe {
 329         my ($val) = git_get_project_config('pickaxe', '--bool');
 330
 331         if ($val eq 'true') {
 332                 return (1);
 333         } elsif ($val eq 'false') {
 334                 return (0);
 335         }
 336
 337         return ($_[0]);
 338 }
 339
 340 # checking HEAD file with -e is fragile if the repository was
 341 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 342 # and then pruned.
 343 sub check_head_link {
 344         my ($dir) = @_;
 345         my $headfile = "$dir/HEAD";
 346         return ((-e $headfile) ||
 347                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 348 }
 349
 350 sub check_export_ok {
 351         my ($dir) = @_;
 352         return (check_head_link($dir) &&
 353                 (!$export_ok || -e "$dir/$export_ok"));
 354 }
 355
 356 # process alternate names for backward compatibility
 357 # filter out unsupported (unknown) snapshot formats
 358 sub filter_snapshot_fmts {
 359         my @fmts = @_;
 360
 361         @fmts = map {
 362                 exists $known_snapshot_format_aliases{$_} ?
 363                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 364         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 365
 366 }
 367
 368 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 369 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 370
 371 # version of the core git binary
 372 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 373
 374 $projects_list ||= $projectroot;
 375
 376 # ======================================================================
 377 # input validation and dispatch
 378 our $action = $cgi->param('a');
 379 if (defined $action) {
 380         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 381                 die_error(undef, "Invalid action parameter");
 382         }
 383 }
 384
 385 # parameters which are pathnames
 386 our $project = $cgi->param('p');
 387 if (defined $project) {
 388         if (!validate_pathname($project) ||
 389             !(-d "$projectroot/$project") ||
 390             !check_head_link("$projectroot/$project") ||
 391             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 392             ($strict_export && !project_in_list($project))) {
 393                 undef $project;
 394                 die_error(undef, "No such project");
 395         }
 396 }
 397
 398 our $file_name = $cgi->param('f');
 399 if (defined $file_name) {
 400         if (!validate_pathname($file_name)) {
 401                 die_error(undef, "Invalid file parameter");
 402         }
 403 }
 404
 405 our $file_parent = $cgi->param('fp');
 406 if (defined $file_parent) {
 407         if (!validate_pathname($file_parent)) {
 408                 die_error(undef, "Invalid file parent parameter");
 409         }
 410 }
 411
 412 # parameters which are refnames
 413 our $hash = $cgi->param('h');
 414 if (defined $hash) {
 415         if (!validate_refname($hash)) {
 416                 die_error(undef, "Invalid hash parameter");
 417         }
 418 }
 419
 420 our $hash_parent = $cgi->param('hp');
 421 if (defined $hash_parent) {
 422         if (!validate_refname($hash_parent)) {
 423                 die_error(undef, "Invalid hash parent parameter");
 424         }
 425 }
 426
 427 our $hash_base = $cgi->param('hb');
 428 if (defined $hash_base) {
 429         if (!validate_refname($hash_base)) {
 430                 die_error(undef, "Invalid hash base parameter");
 431         }
 432 }
 433
 434 my %allowed_options = (
 435         "--no-merges" => [ qw(rss atom log shortlog history) ],
 436 );
 437
 438 our @extra_options = $cgi->param('opt');
 439 if (defined @extra_options) {
 440         foreach(@extra_options)
 441         {
 442                 if (not grep(/^$_$/, keys %allowed_options)) {
 443                         die_error(undef, "Invalid option parameter");
 444                 }
 445                 if (not grep(/^$action$/, @{$allowed_options{$_}})) {
 446                         die_error(undef, "Invalid option parameter for this action");
 447                 }
 448         }
 449 }
 450
 451 our $hash_parent_base = $cgi->param('hpb');
 452 if (defined $hash_parent_base) {
 453         if (!validate_refname($hash_parent_base)) {
 454                 die_error(undef, "Invalid hash parent base parameter");
 455         }
 456 }
 457
 458 # other parameters
 459 our $page = $cgi->param('pg');
 460 if (defined $page) {
 461         if ($page =~ m/[^0-9]/) {
 462                 die_error(undef, "Invalid page parameter");
 463         }
 464 }
 465
 466 our $searchtype = $cgi->param('st');
 467 if (defined $searchtype) {
 468         if ($searchtype =~ m/[^a-z]/) {
 469                 die_error(undef, "Invalid searchtype parameter");
 470         }
 471 }
 472
 473 our $searchtext = $cgi->param('s');
 474 our $search_regexp;
 475 if (defined $searchtext) {
 476         if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 477                 die_error(undef, "Invalid search parameter");
 478         }
 479         if (length($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                 extra_options => "opt",
 603                 hash => "h",
 604                 hash_parent => "hp",
 605                 hash_base => "hb",
 606                 hash_parent_base => "hpb",
 607                 page => "pg",
 608                 order => "o",
 609                 searchtext => "s",
 610                 searchtype => "st",
 611                 snapshot_format => "sf",
 612         );
 613         my %mapping = @mapping;
 614
 615         $params{'project'} = $project unless exists $params{'project'};
 616
 617         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 618         if ($use_pathinfo) {
 619                 # use PATH_INFO for project name
 620                 $href .= "/$params{'project'}" if defined $params{'project'};
 621                 delete $params{'project'};
 622
 623                 # Summary just uses the project path URL
 624                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 625                         delete $params{'action'};
 626                 }
 627         }
 628
 629         # now encode the parameters explicitly
 630         my @result = ();
 631         for (my $i = 0; $i < @mapping; $i += 2) {
 632                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 633                 if (defined $params{$name}) {
 634                         push @result, $symbol . "=" . esc_param($params{$name});
 635                 }
 636         }
 637         $href .= "?" . join(';', @result) if scalar @result;
 638
 639         return $href;
 640 }
 641
 642
 643 ## ======================================================================
 644 ## validation, quoting/unquoting and escaping
 645
 646 sub validate_pathname {
 647         my $input = shift || return undef;
 648
 649         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 650         # at the beginning, at the end, and between slashes.
 651         # also this catches doubled slashes
 652         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 653                 return undef;
 654         }
 655         # no null characters
 656         if ($input =~ m!\0!) {
 657                 return undef;
 658         }
 659         return $input;
 660 }
 661
 662 sub validate_refname {
 663         my $input = shift || return undef;
 664
 665         # textual hashes are O.K.
 666         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 667                 return $input;
 668         }
 669         # it must be correct pathname
 670         $input = validate_pathname($input)
 671                 or return undef;
 672         # restrictions on ref name according to git-check-ref-format
 673         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 674                 return undef;
 675         }
 676         return $input;
 677 }
 678
 679 # decode sequences of octets in utf8 into Perl's internal form,
 680 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 681 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 682 sub to_utf8 {
 683         my $str = shift;
 684         my $res;
 685         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 686         if (defined $res) {
 687                 return $res;
 688         } else {
 689                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 690         }
 691 }
 692
 693 # quote unsafe chars, but keep the slash, even when it's not
 694 # correct, but quoted slashes look too horrible in bookmarks
 695 sub esc_param {
 696         my $str = shift;
 697         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 698         $str =~ s/\+/%2B/g;
 699         $str =~ s/ /\+/g;
 700         return $str;
 701 }
 702
 703 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 704 sub esc_url {
 705         my $str = shift;
 706         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 707         $str =~ s/\+/%2B/g;
 708         $str =~ s/ /\+/g;
 709         return $str;
 710 }
 711
 712 # replace invalid utf8 character with SUBSTITUTION sequence
 713 sub esc_html ($;%) {
 714         my $str = shift;
 715         my %opts = @_;
 716
 717         $str = to_utf8($str);
 718         $str = $cgi->escapeHTML($str);
 719         if ($opts{'-nbsp'}) {
 720                 $str =~ s/ /&nbsp;/g;
 721         }
 722         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 723         return $str;
 724 }
 725
 726 # quote control characters and escape filename to HTML
 727 sub esc_path {
 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:]])|quot_cec($1)|eg;
 737         return $str;
 738 }
 739
 740 # Make control characters "printable", using character escape codes (CEC)
 741 sub quot_cec {
 742         my $cntrl = shift;
 743         my %es = ( # character escape codes, aka escape sequences
 744                    "\t" => '\t',   # tab            (HT)
 745                    "\n" => '\n',   # line feed      (LF)
 746                    "\r" => '\r',   # carrige return (CR)
 747                    "\f" => '\f',   # form feed      (FF)
 748                    "\b" => '\b',   # backspace      (BS)
 749                    "\a" => '\a',   # alarm (bell)   (BEL)
 750                    "\e" => '\e',   # escape         (ESC)
 751                    "\013" => '\v', # vertical tab   (VT)
 752                    "\000" => '\0', # nul character  (NUL)
 753                    );
 754         my $chr = ( (exists $es{$cntrl})
 755                     ? $es{$cntrl}
 756                     : sprintf('\%03o', ord($cntrl)) );
 757         return "<span class=\"cntrl\">$chr</span>";
 758 }
 759
 760 # Alternatively use unicode control pictures codepoints,
 761 # Unicode "printable representation" (PR)
 762 sub quot_upr {
 763         my $cntrl = shift;
 764         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 765         return "<span class=\"cntrl\">$chr</span>";
 766 }
 767
 768 # git may return quoted and escaped filenames
 769 sub unquote {
 770         my $str = shift;
 771
 772         sub unq {
 773                 my $seq = shift;
 774                 my %es = ( # character escape codes, aka escape sequences
 775                         't' => "\t",   # tab            (HT, TAB)
 776                         'n' => "\n",   # newline        (NL)
 777                         'r' => "\r",   # return         (CR)
 778                         'f' => "\f",   # form feed      (FF)
 779                         'b' => "\b",   # backspace      (BS)
 780                         'a' => "\a",   # alarm (bell)   (BEL)
 781                         'e' => "\e",   # escape         (ESC)
 782                         'v' => "\013", # vertical tab   (VT)
 783                 );
 784
 785                 if ($seq =~ m/^[0-7]{1,3}$/) {
 786                         # octal char sequence
 787                         return chr(oct($seq));
 788                 } elsif (exists $es{$seq}) {
 789                         # C escape sequence, aka character escape code
 790                         return $es{$seq}
 791                 }
 792                 # quoted ordinary character
 793                 return $seq;
 794         }
 795
 796         if ($str =~ m/^"(.*)"$/) {
 797                 # needs unquoting
 798                 $str = $1;
 799                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 800         }
 801         return $str;
 802 }
 803
 804 # escape tabs (convert tabs to spaces)
 805 sub untabify {
 806         my $line = shift;
 807
 808         while ((my $pos = index($line, "\t")) != -1) {
 809                 if (my $count = (8 - ($pos % 8))) {
 810                         my $spaces = ' ' x $count;
 811                         $line =~ s/\t/$spaces/;
 812                 }
 813         }
 814
 815         return $line;
 816 }
 817
 818 sub project_in_list {
 819         my $project = shift;
 820         my @list = git_get_projects_list();
 821         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 822 }
 823
 824 ## ----------------------------------------------------------------------
 825 ## HTML aware string manipulation
 826
 827 sub chop_str {
 828         my $str = shift;
 829         my $len = shift;
 830         my $add_len = shift || 10;
 831
 832         # allow only $len chars, but don't cut a word if it would fit in $add_len
 833         # if it doesn't fit, cut it if it's still longer than the dots we would add
 834         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 835         my $body = $1;
 836         my $tail = $2;
 837         if (length($tail) > 4) {
 838                 $tail = " ...";
 839                 $body =~ s/&[^;]*$//; # remove chopped character entities
 840         }
 841         return "$body$tail";
 842 }
 843
 844 ## ----------------------------------------------------------------------
 845 ## functions returning short strings
 846
 847 # CSS class for given age value (in seconds)
 848 sub age_class {
 849         my $age = shift;
 850
 851         if (!defined $age) {
 852                 return "noage";
 853         } elsif ($age < 60*60*2) {
 854                 return "age0";
 855         } elsif ($age < 60*60*24*2) {
 856                 return "age1";
 857         } else {
 858                 return "age2";
 859         }
 860 }
 861
 862 # convert age in seconds to "nn units ago" string
 863 sub age_string {
 864         my $age = shift;
 865         my $age_str;
 866
 867         if ($age > 60*60*24*365*2) {
 868                 $age_str = (int $age/60/60/24/365);
 869                 $age_str .= " years ago";
 870         } elsif ($age > 60*60*24*(365/12)*2) {
 871                 $age_str = int $age/60/60/24/(365/12);
 872                 $age_str .= " months ago";
 873         } elsif ($age > 60*60*24*7*2) {
 874                 $age_str = int $age/60/60/24/7;
 875                 $age_str .= " weeks ago";
 876         } elsif ($age > 60*60*24*2) {
 877                 $age_str = int $age/60/60/24;
 878                 $age_str .= " days ago";
 879         } elsif ($age > 60*60*2) {
 880                 $age_str = int $age/60/60;
 881                 $age_str .= " hours ago";
 882         } elsif ($age > 60*2) {
 883                 $age_str = int $age/60;
 884                 $age_str .= " min ago";
 885         } elsif ($age > 2) {
 886                 $age_str = int $age;
 887                 $age_str .= " sec ago";
 888         } else {
 889                 $age_str .= " right now";
 890         }
 891         return $age_str;
 892 }
 893
 894 # convert file mode in octal to symbolic file mode string
 895 sub mode_str {
 896         my $mode = oct shift;
 897
 898         if (S_ISDIR($mode & S_IFMT)) {
 899                 return 'drwxr-xr-x';
 900         } elsif (S_ISLNK($mode)) {
 901                 return 'lrwxrwxrwx';
 902         } elsif (S_ISREG($mode)) {
 903                 # git cares only about the executable bit
 904                 if ($mode & S_IXUSR) {
 905                         return '-rwxr-xr-x';
 906                 } else {
 907                         return '-rw-r--r--';
 908                 };
 909         } else {
 910                 return '----------';
 911         }
 912 }
 913
 914 # convert file mode in octal to file type string
 915 sub file_type {
 916         my $mode = shift;
 917
 918         if ($mode !~ m/^[0-7]+$/) {
 919                 return $mode;
 920         } else {
 921                 $mode = oct $mode;
 922         }
 923
 924         if (S_ISDIR($mode & S_IFMT)) {
 925                 return "directory";
 926         } elsif (S_ISLNK($mode)) {
 927                 return "symlink";
 928         } elsif (S_ISREG($mode)) {
 929                 return "file";
 930         } else {
 931                 return "unknown";
 932         }
 933 }
 934
 935 # convert file mode in octal to file type description string
 936 sub file_type_long {
 937         my $mode = shift;
 938
 939         if ($mode !~ m/^[0-7]+$/) {
 940                 return $mode;
 941         } else {
 942                 $mode = oct $mode;
 943         }
 944
 945         if (S_ISDIR($mode & S_IFMT)) {
 946                 return "directory";
 947         } elsif (S_ISLNK($mode)) {
 948                 return "symlink";
 949         } elsif (S_ISREG($mode)) {
 950                 if ($mode & S_IXUSR) {
 951                         return "executable";
 952                 } else {
 953                         return "file";
 954                 };
 955         } else {
 956                 return "unknown";
 957         }
 958 }
 959
 960
 961 ## ----------------------------------------------------------------------
 962 ## functions returning short HTML fragments, or transforming HTML fragments
 963 ## which don't belong to other sections
 964
 965 # format line of commit message.
 966 sub format_log_line_html {
 967         my $line = shift;
 968
 969         $line = esc_html($line, -nbsp=>1);
 970         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 971                 my $hash_text = $1;
 972                 my $link =
 973                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 974                                 -class => "text"}, $hash_text);
 975                 $line =~ s/$hash_text/$link/;
 976         }
 977         return $line;
 978 }
 979
 980 # format marker of refs pointing to given object
 981 sub format_ref_marker {
 982         my ($refs, $id) = @_;
 983         my $markers = '';
 984
 985         if (defined $refs->{$id}) {
 986                 foreach my $ref (@{$refs->{$id}}) {
 987                         my ($type, $name) = qw();
 988                         # e.g. tags/v2.6.11 or heads/next
 989                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
 990                                 $type = $1;
 991                                 $name = $2;
 992                         } else {
 993                                 $type = "ref";
 994                                 $name = $ref;
 995                         }
 996
 997                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
 998                                     esc_html($name) . "</span>";
 999                 }
1000         }
1001
1002         if ($markers) {
1003                 return ' <span class="refs">'. $markers . '</span>';
1004         } else {
1005                 return "";
1006         }
1007 }
1008
1009 # format, perhaps shortened and with markers, title line
1010 sub format_subject_html {
1011         my ($long, $short, $href, $extra) = @_;
1012         $extra = '' unless defined($extra);
1013
1014         if (length($short) < length($long)) {
1015                 return $cgi->a({-href => $href, -class => "list subject",
1016                                 -title => to_utf8($long)},
1017                        esc_html($short) . $extra);
1018         } else {
1019                 return $cgi->a({-href => $href, -class => "list subject"},
1020                        esc_html($long)  . $extra);
1021         }
1022 }
1023
1024 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1025 sub format_git_diff_header_line {
1026         my $line = shift;
1027         my $diffinfo = shift;
1028         my ($from, $to) = @_;
1029
1030         if ($diffinfo->{'nparents'}) {
1031                 # combined diff
1032                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1033                 if ($to->{'href'}) {
1034                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1035                                          esc_path($to->{'file'}));
1036                 } else { # file was deleted (no href)
1037                         $line .= esc_path($to->{'file'});
1038                 }
1039         } else {
1040                 # "ordinary" diff
1041                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1042                 if ($from->{'href'}) {
1043                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1044                                          'a/' . esc_path($from->{'file'}));
1045                 } else { # file was added (no href)
1046                         $line .= 'a/' . esc_path($from->{'file'});
1047                 }
1048                 $line .= ' ';
1049                 if ($to->{'href'}) {
1050                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1051                                          'b/' . esc_path($to->{'file'}));
1052                 } else { # file was deleted
1053                         $line .= 'b/' . esc_path($to->{'file'});
1054                 }
1055         }
1056
1057         return "<div class=\"diff header\">$line</div>\n";
1058 }
1059
1060 # format extended diff header line, before patch itself
1061 sub format_extended_diff_header_line {
1062         my $line = shift;
1063         my $diffinfo = shift;
1064         my ($from, $to) = @_;
1065
1066         # match <path>
1067         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1068                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1069                                        esc_path($from->{'file'}));
1070         }
1071         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1072                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1073                                  esc_path($to->{'file'}));
1074         }
1075         # match single <mode>
1076         if ($line =~ m/\s(\d{6})$/) {
1077                 $line .= '<span class="info"> (' .
1078                          file_type_long($1) .
1079                          ')</span>';
1080         }
1081         # match <hash>
1082         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1083                 # can match only for combined diff
1084                 $line = 'index ';
1085                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1086                         if ($from->{'href'}[$i]) {
1087                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1088                                                   -class=>"hash"},
1089                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1090                         } else {
1091                                 $line .= '0' x 7;
1092                         }
1093                         # separator
1094                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1095                 }
1096                 $line .= '..';
1097                 if ($to->{'href'}) {
1098                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1099                                          substr($diffinfo->{'to_id'},0,7));
1100                 } else {
1101                         $line .= '0' x 7;
1102                 }
1103
1104         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1105                 # can match only for ordinary diff
1106                 my ($from_link, $to_link);
1107                 if ($from->{'href'}) {
1108                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1109                                              substr($diffinfo->{'from_id'},0,7));
1110                 } else {
1111                         $from_link = '0' x 7;
1112                 }
1113                 if ($to->{'href'}) {
1114                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1115                                            substr($diffinfo->{'to_id'},0,7));
1116                 } else {
1117                         $to_link = '0' x 7;
1118                 }
1119                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1120                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1121         }
1122
1123         return $line . "<br/>\n";
1124 }
1125
1126 # format from-file/to-file diff header
1127 sub format_diff_from_to_header {
1128         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1129         my $line;
1130         my $result = '';
1131
1132         $line = $from_line;
1133         #assert($line =~ m/^---/) if DEBUG;
1134         # no extra formatting for "^--- /dev/null"
1135         if (! $diffinfo->{'nparents'}) {
1136                 # ordinary (single parent) diff
1137                 if ($line =~ m!^--- "?a/!) {
1138                         if ($from->{'href'}) {
1139                                 $line = '--- a/' .
1140                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1141                                                 esc_path($from->{'file'}));
1142                         } else {
1143                                 $line = '--- a/' .
1144                                         esc_path($from->{'file'});
1145                         }
1146                 }
1147                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1148
1149         } else {
1150                 # combined diff (merge commit)
1151                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1152                         if ($from->{'href'}[$i]) {
1153                                 $line = '--- ' .
1154                                         $cgi->a({-href=>href(action=>"blobdiff",
1155                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1156                                                              hash_parent_base=>$parents[$i],
1157                                                              file_parent=>$from->{'file'}[$i],
1158                                                              hash=>$diffinfo->{'to_id'},
1159                                                              hash_base=>$hash,
1160                                                              file_name=>$to->{'file'}),
1161                                                  -class=>"path",
1162                                                  -title=>"diff" . ($i+1)},
1163                                                 $i+1) .
1164                                         '/' .
1165                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1166                                                 esc_path($from->{'file'}[$i]));
1167                         } else {
1168                                 $line = '--- /dev/null';
1169                         }
1170                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1171                 }
1172         }
1173
1174         $line = $to_line;
1175         #assert($line =~ m/^\+\+\+/) if DEBUG;
1176         # no extra formatting for "^+++ /dev/null"
1177         if ($line =~ m!^\+\+\+ "?b/!) {
1178                 if ($to->{'href'}) {
1179                         $line = '+++ b/' .
1180                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1181                                         esc_path($to->{'file'}));
1182                 } else {
1183                         $line = '+++ b/' .
1184                                 esc_path($to->{'file'});
1185                 }
1186         }
1187         $result .= qq!<div class="diff to_file">$line</div>\n!;
1188
1189         return $result;
1190 }
1191
1192 # create note for patch simplified by combined diff
1193 sub format_diff_cc_simplified {
1194         my ($diffinfo, @parents) = @_;
1195         my $result = '';
1196
1197         $result .= "<div class=\"diff header\">" .
1198                    "diff --cc ";
1199         if (!is_deleted($diffinfo)) {
1200                 $result .= $cgi->a({-href => href(action=>"blob",
1201                                                   hash_base=>$hash,
1202                                                   hash=>$diffinfo->{'to_id'},
1203                                                   file_name=>$diffinfo->{'to_file'}),
1204                                     -class => "path"},
1205                                    esc_path($diffinfo->{'to_file'}));
1206         } else {
1207                 $result .= esc_path($diffinfo->{'to_file'});
1208         }
1209         $result .= "</div>\n" . # class="diff header"
1210                    "<div class=\"diff nodifferences\">" .
1211                    "Simple merge" .
1212                    "</div>\n"; # class="diff nodifferences"
1213
1214         return $result;
1215 }
1216
1217 # format patch (diff) line (not to be used for diff headers)
1218 sub format_diff_line {
1219         my $line = shift;
1220         my ($from, $to) = @_;
1221         my $diff_class = "";
1222
1223         chomp $line;
1224
1225         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1226                 # combined diff
1227                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1228                 if ($line =~ m/^\@{3}/) {
1229                         $diff_class = " chunk_header";
1230                 } elsif ($line =~ m/^\\/) {
1231                         $diff_class = " incomplete";
1232                 } elsif ($prefix =~ tr/+/+/) {
1233                         $diff_class = " add";
1234                 } elsif ($prefix =~ tr/-/-/) {
1235                         $diff_class = " rem";
1236                 }
1237         } else {
1238                 # assume ordinary diff
1239                 my $char = substr($line, 0, 1);
1240                 if ($char eq '+') {
1241                         $diff_class = " add";
1242                 } elsif ($char eq '-') {
1243                         $diff_class = " rem";
1244                 } elsif ($char eq '@') {
1245                         $diff_class = " chunk_header";
1246                 } elsif ($char eq "\\") {
1247                         $diff_class = " incomplete";
1248                 }
1249         }
1250         $line = untabify($line);
1251         if ($from && $to && $line =~ m/^\@{2} /) {
1252                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1253                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1254
1255                 $from_lines = 0 unless defined $from_lines;
1256                 $to_lines   = 0 unless defined $to_lines;
1257
1258                 if ($from->{'href'}) {
1259                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1260                                              -class=>"list"}, $from_text);
1261                 }
1262                 if ($to->{'href'}) {
1263                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1264                                              -class=>"list"}, $to_text);
1265                 }
1266                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1267                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1268                 return "<div class=\"diff$diff_class\">$line</div>\n";
1269         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1270                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1271                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1272
1273                 @from_text = split(' ', $ranges);
1274                 for (my $i = 0; $i < @from_text; ++$i) {
1275                         ($from_start[$i], $from_nlines[$i]) =
1276                                 (split(',', substr($from_text[$i], 1)), 0);
1277                 }
1278
1279                 $to_text   = pop @from_text;
1280                 $to_start  = pop @from_start;
1281                 $to_nlines = pop @from_nlines;
1282
1283                 $line = "<span class=\"chunk_info\">$prefix ";
1284                 for (my $i = 0; $i < @from_text; ++$i) {
1285                         if ($from->{'href'}[$i]) {
1286                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1287                                                   -class=>"list"}, $from_text[$i]);
1288                         } else {
1289                                 $line .= $from_text[$i];
1290                         }
1291                         $line .= " ";
1292                 }
1293                 if ($to->{'href'}) {
1294                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1295                                           -class=>"list"}, $to_text);
1296                 } else {
1297                         $line .= $to_text;
1298                 }
1299                 $line .= " $prefix</span>" .
1300                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1301                 return "<div class=\"diff$diff_class\">$line</div>\n";
1302         }
1303         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1304 }
1305
1306 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1307 # linked.  Pass the hash of the tree/commit to snapshot.
1308 sub format_snapshot_links {
1309         my ($hash) = @_;
1310         my @snapshot_fmts = gitweb_check_feature('snapshot');
1311         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1312         my $num_fmts = @snapshot_fmts;
1313         if ($num_fmts > 1) {
1314                 # A parenthesized list of links bearing format names.
1315                 # e.g. "snapshot (_tar.gz_ _zip_)"
1316                 return "snapshot (" . join(' ', map
1317                         $cgi->a({
1318                                 -href => href(
1319                                         action=>"snapshot",
1320                                         hash=>$hash,
1321                                         snapshot_format=>$_
1322                                 )
1323                         }, $known_snapshot_formats{$_}{'display'})
1324                 , @snapshot_fmts) . ")";
1325         } elsif ($num_fmts == 1) {
1326                 # A single "snapshot" link whose tooltip bears the format name.
1327                 # i.e. "_snapshot_"
1328                 my ($fmt) = @snapshot_fmts;
1329                 return
1330                         $cgi->a({
1331                                 -href => href(
1332                                         action=>"snapshot",
1333                                         hash=>$hash,
1334                                         snapshot_format=>$fmt
1335                                 ),
1336                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1337                         }, "snapshot");
1338         } else { # $num_fmts == 0
1339                 return undef;
1340         }
1341 }
1342
1343 ## ----------------------------------------------------------------------
1344 ## git utility subroutines, invoking git commands
1345
1346 # returns path to the core git executable and the --git-dir parameter as list
1347 sub git_cmd {
1348         return $GIT, '--git-dir='.$git_dir;
1349 }
1350
1351 # returns path to the core git executable and the --git-dir parameter as string
1352 sub git_cmd_str {
1353         return join(' ', git_cmd());
1354 }
1355
1356 # get HEAD ref of given project as hash
1357 sub git_get_head_hash {
1358         my $project = shift;
1359         my $o_git_dir = $git_dir;
1360         my $retval = undef;
1361         $git_dir = "$projectroot/$project";
1362         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1363                 my $head = <$fd>;
1364                 close $fd;
1365                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1366                         $retval = $1;
1367                 }
1368         }
1369         if (defined $o_git_dir) {
1370                 $git_dir = $o_git_dir;
1371         }
1372         return $retval;
1373 }
1374
1375 # get type of given object
1376 sub git_get_type {
1377         my $hash = shift;
1378
1379         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1380         my $type = <$fd>;
1381         close $fd or return;
1382         chomp $type;
1383         return $type;
1384 }
1385
1386 sub git_get_project_config {
1387         my ($key, $type) = @_;
1388
1389         return unless ($key);
1390         $key =~ s/^gitweb\.//;
1391         return if ($key =~ m/\W/);
1392
1393         my @x = (git_cmd(), 'config');
1394         if (defined $type) { push @x, $type; }
1395         push @x, "--get";
1396         push @x, "gitweb.$key";
1397         my $val = qx(@x);
1398         chomp $val;
1399         return ($val);
1400 }
1401
1402 # get hash of given path at given ref
1403 sub git_get_hash_by_path {
1404         my $base = shift;
1405         my $path = shift || return undef;
1406         my $type = shift;
1407
1408         $path =~ s,/+$,,;
1409
1410         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1411                 or die_error(undef, "Open git-ls-tree failed");
1412         my $line = <$fd>;
1413         close $fd or return undef;
1414
1415         if (!defined $line) {
1416                 # there is no tree or hash given by $path at $base
1417                 return undef;
1418         }
1419
1420         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1421         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1422         if (defined $type && $type ne $2) {
1423                 # type doesn't match
1424                 return undef;
1425         }
1426         return $3;
1427 }
1428
1429 # get path of entry with given hash at given tree-ish (ref)
1430 # used to get 'from' filename for combined diff (merge commit) for renames
1431 sub git_get_path_by_hash {
1432         my $base = shift || return;
1433         my $hash = shift || return;
1434
1435         local $/ = "\0";
1436
1437         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1438                 or return undef;
1439         while (my $line = <$fd>) {
1440                 chomp $line;
1441
1442                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1443                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1444                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1445                         close $fd;
1446                         return $1;
1447                 }
1448         }
1449         close $fd;
1450         return undef;
1451 }
1452
1453 ## ......................................................................
1454 ## git utility functions, directly accessing git repository
1455
1456 sub git_get_project_description {
1457         my $path = shift;
1458
1459         open my $fd, "$projectroot/$path/description" or return undef;
1460         my $descr = <$fd>;
1461         close $fd;
1462         if (defined $descr) {
1463                 chomp $descr;
1464         }
1465         return $descr;
1466 }
1467
1468 sub git_get_project_url_list {
1469         my $path = shift;
1470
1471         open my $fd, "$projectroot/$path/cloneurl" or return;
1472         my @git_project_url_list = map { chomp; $_ } <$fd>;
1473         close $fd;
1474
1475         return wantarray ? @git_project_url_list : \@git_project_url_list;
1476 }
1477
1478 sub git_get_projects_list {
1479         my ($filter) = @_;
1480         my @list;
1481
1482         $filter ||= '';
1483         $filter =~ s/\.git$//;
1484
1485         my ($check_forks) = gitweb_check_feature('forks');
1486
1487         if (-d $projects_list) {
1488                 # search in directory
1489                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1490                 # remove the trailing "/"
1491                 $dir =~ s!/+$!!;
1492                 my $pfxlen = length("$dir");
1493
1494                 File::Find::find({
1495                         follow_fast => 1, # follow symbolic links
1496                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1497                         wanted => sub {
1498                                 # skip project-list toplevel, if we get it.
1499                                 return if (m!^[/.]$!);
1500                                 # only directories can be git repositories
1501                                 return unless (-d $_);
1502
1503                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1504                                 # we check related file in $projectroot
1505                                 if ($check_forks and $subdir =~ m#/.#) {
1506                                         $File::Find::prune = 1;
1507                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1508                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1509                                         $File::Find::prune = 1;
1510                                 }
1511                         },
1512                 }, "$dir");
1513
1514         } elsif (-f $projects_list) {
1515                 # read from file(url-encoded):
1516                 # 'git%2Fgit.git Linus+Torvalds'
1517                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1518                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1519                 my %paths;
1520                 open my ($fd), $projects_list or return;
1521         PROJECT:
1522                 while (my $line = <$fd>) {
1523                         chomp $line;
1524                         my ($path, $owner) = split ' ', $line;
1525                         $path = unescape($path);
1526                         $owner = unescape($owner);
1527                         if (!defined $path) {
1528                                 next;
1529                         }
1530                         if ($filter ne '') {
1531                                 # looking for forks;
1532                                 my $pfx = substr($path, 0, length($filter));
1533                                 if ($pfx ne $filter) {
1534                                         next PROJECT;
1535                                 }
1536                                 my $sfx = substr($path, length($filter));
1537                                 if ($sfx !~ /^\/.*\.git$/) {
1538                                         next PROJECT;
1539                                 }
1540                         } elsif ($check_forks) {
1541                         PATH:
1542                                 foreach my $filter (keys %paths) {
1543                                         # looking for forks;
1544                                         my $pfx = substr($path, 0, length($filter));
1545                                         if ($pfx ne $filter) {
1546                                                 next PATH;
1547                                         }
1548                                         my $sfx = substr($path, length($filter));
1549                                         if ($sfx !~ /^\/.*\.git$/) {
1550                                                 next PATH;
1551                                         }
1552                                         # is a fork, don't include it in
1553                                         # the list
1554                                         next PROJECT;
1555                                 }
1556                         }
1557                         if (check_export_ok("$projectroot/$path")) {
1558                                 my $pr = {
1559                                         path => $path,
1560                                         owner => to_utf8($owner),
1561                                 };
1562                                 push @list, $pr;
1563                                 (my $forks_path = $path) =~ s/\.git$//;
1564                                 $paths{$forks_path}++;
1565                         }
1566                 }
1567                 close $fd;
1568         }
1569         return @list;
1570 }
1571
1572 our $gitweb_project_owner = undef;
1573 sub git_get_project_list_from_file {
1574
1575         return if (defined $gitweb_project_owner);
1576
1577         $gitweb_project_owner = {};
1578         # read from file (url-encoded):
1579         # 'git%2Fgit.git Linus+Torvalds'
1580         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1581         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1582         if (-f $projects_list) {
1583                 open (my $fd , $projects_list);
1584                 while (my $line = <$fd>) {
1585                         chomp $line;
1586                         my ($pr, $ow) = split ' ', $line;
1587                         $pr = unescape($pr);
1588                         $ow = unescape($ow);
1589                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1590                 }
1591                 close $fd;
1592         }
1593 }
1594
1595 sub git_get_project_owner {
1596         my $project = shift;
1597         my $owner;
1598
1599         return undef unless $project;
1600
1601         if (!defined $gitweb_project_owner) {
1602                 git_get_project_list_from_file();
1603         }
1604
1605         if (exists $gitweb_project_owner->{$project}) {
1606                 $owner = $gitweb_project_owner->{$project};
1607         }
1608         if (!defined $owner) {
1609                 $owner = get_file_owner("$projectroot/$project");
1610         }
1611
1612         return $owner;
1613 }
1614
1615 sub git_get_last_activity {
1616         my ($path) = @_;
1617         my $fd;
1618
1619         $git_dir = "$projectroot/$path";
1620         open($fd, "-|", git_cmd(), 'for-each-ref',
1621              '--format=%(committer)',
1622              '--sort=-committerdate',
1623              '--count=1',
1624              'refs/heads') or return;
1625         my $most_recent = <$fd>;
1626         close $fd or return;
1627         if (defined $most_recent &&
1628             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1629                 my $timestamp = $1;
1630                 my $age = time - $timestamp;
1631                 return ($age, age_string($age));
1632         }
1633         return (undef, undef);
1634 }
1635
1636 sub git_get_references {
1637         my $type = shift || "";
1638         my %refs;
1639         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1640         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1641         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1642                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1643                 or return;
1644
1645         while (my $line = <$fd>) {
1646                 chomp $line;
1647                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1648                         if (defined $refs{$1}) {
1649                                 push @{$refs{$1}}, $2;
1650                         } else {
1651                                 $refs{$1} = [ $2 ];
1652                         }
1653                 }
1654         }
1655         close $fd or return;
1656         return \%refs;
1657 }
1658
1659 sub git_get_rev_name_tags {
1660         my $hash = shift || return undef;
1661
1662         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1663                 or return;
1664         my $name_rev = <$fd>;
1665         close $fd;
1666
1667         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1668                 return $1;
1669         } else {
1670                 # catches also '$hash undefined' output
1671                 return undef;
1672         }
1673 }
1674
1675 ## ----------------------------------------------------------------------
1676 ## parse to hash functions
1677
1678 sub parse_date {
1679         my $epoch = shift;
1680         my $tz = shift || "-0000";
1681
1682         my %date;
1683         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1684         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1685         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1686         $date{'hour'} = $hour;
1687         $date{'minute'} = $min;
1688         $date{'mday'} = $mday;
1689         $date{'day'} = $days[$wday];
1690         $date{'month'} = $months[$mon];
1691         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1692                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1693         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1694                              $mday, $months[$mon], $hour ,$min;
1695         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1696                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1697
1698         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1699         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1700         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1701         $date{'hour_local'} = $hour;
1702         $date{'minute_local'} = $min;
1703         $date{'tz_local'} = $tz;
1704         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1705                                   1900+$year, $mon+1, $mday,
1706                                   $hour, $min, $sec, $tz);
1707         return %date;
1708 }
1709
1710 sub parse_tag {
1711         my $tag_id = shift;
1712         my %tag;
1713         my @comment;
1714
1715         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1716         $tag{'id'} = $tag_id;
1717         while (my $line = <$fd>) {
1718                 chomp $line;
1719                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1720                         $tag{'object'} = $1;
1721                 } elsif ($line =~ m/^type (.+)$/) {
1722                         $tag{'type'} = $1;
1723                 } elsif ($line =~ m/^tag (.+)$/) {
1724                         $tag{'name'} = $1;
1725                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1726                         $tag{'author'} = $1;
1727                         $tag{'epoch'} = $2;
1728                         $tag{'tz'} = $3;
1729                 } elsif ($line =~ m/--BEGIN/) {
1730                         push @comment, $line;
1731                         last;
1732                 } elsif ($line eq "") {
1733                         last;
1734                 }
1735         }
1736         push @comment, <$fd>;
1737         $tag{'comment'} = \@comment;
1738         close $fd or return;
1739         if (!defined $tag{'name'}) {
1740                 return
1741         };
1742         return %tag
1743 }
1744
1745 sub parse_commit_text {
1746         my ($commit_text, $withparents) = @_;
1747         my @commit_lines = split '\n', $commit_text;
1748         my %co;
1749
1750         pop @commit_lines; # Remove '\0'
1751
1752         if (! @commit_lines) {
1753                 return;
1754         }
1755
1756         my $header = shift @commit_lines;
1757         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1758                 return;
1759         }
1760         ($co{'id'}, my @parents) = split ' ', $header;
1761         while (my $line = shift @commit_lines) {
1762                 last if $line eq "\n";
1763                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1764                         $co{'tree'} = $1;
1765                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1766                         push @parents, $1;
1767                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1768                         $co{'author'} = $1;
1769                         $co{'author_epoch'} = $2;
1770                         $co{'author_tz'} = $3;
1771                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1772                                 $co{'author_name'}  = $1;
1773                                 $co{'author_email'} = $2;
1774                         } else {
1775                                 $co{'author_name'} = $co{'author'};
1776                         }
1777                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1778                         $co{'committer'} = $1;
1779                         $co{'committer_epoch'} = $2;
1780                         $co{'committer_tz'} = $3;
1781                         $co{'committer_name'} = $co{'committer'};
1782                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1783                                 $co{'committer_name'}  = $1;
1784                                 $co{'committer_email'} = $2;
1785                         } else {
1786                                 $co{'committer_name'} = $co{'committer'};
1787                         }
1788                 }
1789         }
1790         if (!defined $co{'tree'}) {
1791                 return;
1792         };
1793         $co{'parents'} = \@parents;
1794         $co{'parent'} = $parents[0];
1795
1796         foreach my $title (@commit_lines) {
1797                 $title =~ s/^    //;
1798                 if ($title ne "") {
1799                         $co{'title'} = chop_str($title, 80, 5);
1800                         # remove leading stuff of merges to make the interesting part visible
1801                         if (length($title) > 50) {
1802                                 $title =~ s/^Automatic //;
1803                                 $title =~ s/^merge (of|with) /Merge ... /i;
1804                                 if (length($title) > 50) {
1805                                         $title =~ s/(http|rsync):\/\///;
1806                                 }
1807                                 if (length($title) > 50) {
1808                                         $title =~ s/(master|www|rsync)\.//;
1809                                 }
1810                                 if (length($title) > 50) {
1811                                         $title =~ s/kernel.org:?//;
1812                                 }
1813                                 if (length($title) > 50) {
1814                                         $title =~ s/\/pub\/scm//;
1815                                 }
1816                         }
1817                         $co{'title_short'} = chop_str($title, 50, 5);
1818                         last;
1819                 }
1820         }
1821         if ($co{'title'} eq "") {
1822                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1823         }
1824         # remove added spaces
1825         foreach my $line (@commit_lines) {
1826                 $line =~ s/^    //;
1827         }
1828         $co{'comment'} = \@commit_lines;
1829
1830         my $age = time - $co{'committer_epoch'};
1831         $co{'age'} = $age;
1832         $co{'age_string'} = age_string($age);
1833         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1834         if ($age > 60*60*24*7*2) {
1835                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1836                 $co{'age_string_age'} = $co{'age_string'};
1837         } else {
1838                 $co{'age_string_date'} = $co{'age_string'};
1839                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1840         }
1841         return %co;
1842 }
1843
1844 sub parse_commit {
1845         my ($commit_id) = @_;
1846         my %co;
1847
1848         local $/ = "\0";
1849
1850         open my $fd, "-|", git_cmd(), "rev-list",
1851                 "--parents",
1852                 "--header",
1853                 "--max-count=1",
1854                 $commit_id,
1855                 "--",
1856                 or die_error(undef, "Open git-rev-list failed");
1857         %co = parse_commit_text(<$fd>, 1);
1858         close $fd;
1859
1860         return %co;
1861 }
1862
1863 sub parse_commits {
1864         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1865         my @cos;
1866
1867         $maxcount ||= 1;
1868         $skip ||= 0;
1869
1870         local $/ = "\0";
1871
1872         open my $fd, "-|", git_cmd(), "rev-list",
1873                 "--header",
1874                 ($arg ? ($arg) : ()),
1875                 ("--max-count=" . $maxcount),
1876                 ("--skip=" . $skip),
1877                 @extra_options,
1878                 $commit_id,
1879                 "--",
1880                 ($filename ? ($filename) : ())
1881                 or die_error(undef, "Open git-rev-list failed");
1882         while (my $line = <$fd>) {
1883                 my %co = parse_commit_text($line);
1884                 push @cos, \%co;
1885         }
1886         close $fd;
1887
1888         return wantarray ? @cos : \@cos;
1889 }
1890
1891 # parse ref from ref_file, given by ref_id, with given type
1892 sub parse_ref {
1893         my $ref_file = shift;
1894         my $ref_id = shift;
1895         my $type = shift || git_get_type($ref_id);
1896         my %ref_item;
1897
1898         $ref_item{'type'} = $type;
1899         $ref_item{'id'} = $ref_id;
1900         $ref_item{'epoch'} = 0;
1901         $ref_item{'age'} = "unknown";
1902         if ($type eq "tag") {
1903                 my %tag = parse_tag($ref_id);
1904                 $ref_item{'comment'} = $tag{'comment'};
1905                 if ($tag{'type'} eq "commit") {
1906                         my %co = parse_commit($tag{'object'});
1907                         $ref_item{'epoch'} = $co{'committer_epoch'};
1908                         $ref_item{'age'} = $co{'age_string'};
1909                 } elsif (defined($tag{'epoch'})) {
1910                         my $age = time - $tag{'epoch'};
1911                         $ref_item{'epoch'} = $tag{'epoch'};
1912                         $ref_item{'age'} = age_string($age);
1913                 }
1914                 $ref_item{'reftype'} = $tag{'type'};
1915                 $ref_item{'name'} = $tag{'name'};
1916                 $ref_item{'refid'} = $tag{'object'};
1917         } elsif ($type eq "commit"){
1918                 my %co = parse_commit($ref_id);
1919                 $ref_item{'reftype'} = "commit";
1920                 $ref_item{'name'} = $ref_file;
1921                 $ref_item{'title'} = $co{'title'};
1922                 $ref_item{'refid'} = $ref_id;
1923                 $ref_item{'epoch'} = $co{'committer_epoch'};
1924                 $ref_item{'age'} = $co{'age_string'};
1925         } else {
1926                 $ref_item{'reftype'} = $type;
1927                 $ref_item{'name'} = $ref_file;
1928                 $ref_item{'refid'} = $ref_id;
1929         }
1930
1931         return %ref_item;
1932 }
1933
1934 # parse line of git-diff-tree "raw" output
1935 sub parse_difftree_raw_line {
1936         my $line = shift;
1937         my %res;
1938
1939         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1940         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1941         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1942                 $res{'from_mode'} = $1;
1943                 $res{'to_mode'} = $2;
1944                 $res{'from_id'} = $3;
1945                 $res{'to_id'} = $4;
1946                 $res{'status'} = $5;
1947                 $res{'similarity'} = $6;
1948                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1949                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1950                 } else {
1951                         $res{'file'} = unquote($7);
1952                 }
1953         }
1954         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1955         # combined diff (for merge commit)
1956         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1957                 $res{'nparents'}  = length($1);
1958                 $res{'from_mode'} = [ split(' ', $2) ];
1959                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1960                 $res{'from_id'} = [ split(' ', $3) ];
1961                 $res{'to_id'} = pop @{$res{'from_id'}};
1962                 $res{'status'} = [ split('', $4) ];
1963                 $res{'to_file'} = unquote($5);
1964         }
1965         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1966         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1967                 $res{'commit'} = $1;
1968         }
1969
1970         return wantarray ? %res : \%res;
1971 }
1972
1973 # parse line of git-ls-tree output
1974 sub parse_ls_tree_line ($;%) {
1975         my $line = shift;
1976         my %opts = @_;
1977         my %res;
1978
1979         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1980         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
1981
1982         $res{'mode'} = $1;
1983         $res{'type'} = $2;
1984         $res{'hash'} = $3;
1985         if ($opts{'-z'}) {
1986                 $res{'name'} = $4;
1987         } else {
1988                 $res{'name'} = unquote($4);
1989         }
1990
1991         return wantarray ? %res : \%res;
1992 }
1993
1994 # generates _two_ hashes, references to which are passed as 2 and 3 argument
1995 sub parse_from_to_diffinfo {
1996         my ($diffinfo, $from, $to, @parents) = @_;
1997
1998         if ($diffinfo->{'nparents'}) {
1999                 # combined diff
2000                 $from->{'file'} = [];
2001                 $from->{'href'} = [];
2002                 fill_from_file_info($diffinfo, @parents)
2003                         unless exists $diffinfo->{'from_file'};
2004                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2005                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2006                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2007                                 $from->{'href'}[$i] = href(action=>"blob",
2008                                                            hash_base=>$parents[$i],
2009                                                            hash=>$diffinfo->{'from_id'}[$i],
2010                                                            file_name=>$from->{'file'}[$i]);
2011                         } else {
2012                                 $from->{'href'}[$i] = undef;
2013                         }
2014                 }
2015         } else {
2016                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2017                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2018                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2019                                                hash=>$diffinfo->{'from_id'},
2020                                                file_name=>$from->{'file'});
2021                 } else {
2022                         delete $from->{'href'};
2023                 }
2024         }
2025
2026         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2027         if (!is_deleted($diffinfo)) { # file exists in result
2028                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2029                                      hash=>$diffinfo->{'to_id'},
2030                                      file_name=>$to->{'file'});
2031         } else {
2032                 delete $to->{'href'};
2033         }
2034 }
2035
2036 ## ......................................................................
2037 ## parse to array of hashes functions
2038
2039 sub git_get_heads_list {
2040         my $limit = shift;
2041         my @headslist;
2042
2043         open my $fd, '-|', git_cmd(), 'for-each-ref',
2044                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2045                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2046                 'refs/heads'
2047                 or return;
2048         while (my $line = <$fd>) {
2049                 my %ref_item;
2050
2051                 chomp $line;
2052                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2053                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2054                 my ($committer, $epoch, $tz) =
2055                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2056                 $name =~ s!^refs/heads/!!;
2057
2058                 $ref_item{'name'}  = $name;
2059                 $ref_item{'id'}    = $hash;
2060                 $ref_item{'title'} = $title || '(no commit message)';
2061                 $ref_item{'epoch'} = $epoch;
2062                 if ($epoch) {
2063                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2064                 } else {
2065                         $ref_item{'age'} = "unknown";
2066                 }
2067
2068                 push @headslist, \%ref_item;
2069         }
2070         close $fd;
2071
2072         return wantarray ? @headslist : \@headslist;
2073 }
2074
2075 sub git_get_tags_list {
2076         my $limit = shift;
2077         my @tagslist;
2078
2079         open my $fd, '-|', git_cmd(), 'for-each-ref',
2080                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2081                 '--format=%(objectname) %(objecttype) %(refname) '.
2082                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2083                 'refs/tags'
2084                 or return;
2085         while (my $line = <$fd>) {
2086                 my %ref_item;
2087
2088                 chomp $line;
2089                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2090                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2091                 my ($creator, $epoch, $tz) =
2092                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2093                 $name =~ s!^refs/tags/!!;
2094
2095                 $ref_item{'type'} = $type;
2096                 $ref_item{'id'} = $id;
2097                 $ref_item{'name'} = $name;
2098                 if ($type eq "tag") {
2099                         $ref_item{'subject'} = $title;
2100                         $ref_item{'reftype'} = $reftype;
2101                         $ref_item{'refid'}   = $refid;
2102                 } else {
2103                         $ref_item{'reftype'} = $type;
2104                         $ref_item{'refid'}   = $id;
2105                 }
2106
2107                 if ($type eq "tag" || $type eq "commit") {
2108                         $ref_item{'epoch'} = $epoch;
2109                         if ($epoch) {
2110                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2111                         } else {
2112                                 $ref_item{'age'} = "unknown";
2113                         }
2114                 }
2115
2116                 push @tagslist, \%ref_item;
2117         }
2118         close $fd;
2119
2120         return wantarray ? @tagslist : \@tagslist;
2121 }
2122
2123 ## ----------------------------------------------------------------------
2124 ## filesystem-related functions
2125
2126 sub get_file_owner {
2127         my $path = shift;
2128
2129         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2130         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2131         if (!defined $gcos) {
2132                 return undef;
2133         }
2134         my $owner = $gcos;
2135         $owner =~ s/[,;].*$//;
2136         return to_utf8($owner);
2137 }
2138
2139 ## ......................................................................
2140 ## mimetype related functions
2141
2142 sub mimetype_guess_file {
2143         my $filename = shift;
2144         my $mimemap = shift;
2145         -r $mimemap or return undef;
2146
2147         my %mimemap;
2148         open(MIME, $mimemap) or return undef;
2149         while (<MIME>) {
2150                 next if m/^#/; # skip comments
2151                 my ($mime, $exts) = split(/\t+/);
2152                 if (defined $exts) {
2153                         my @exts = split(/\s+/, $exts);
2154                         foreach my $ext (@exts) {
2155                                 $mimemap{$ext} = $mime;
2156                         }
2157                 }
2158         }
2159         close(MIME);
2160
2161         $filename =~ /\.([^.]*)$/;
2162         return $mimemap{$1};
2163 }
2164
2165 sub mimetype_guess {
2166         my $filename = shift;
2167         my $mime;
2168         $filename =~ /\./ or return undef;
2169
2170         if ($mimetypes_file) {
2171                 my $file = $mimetypes_file;
2172                 if ($file !~ m!^/!) { # if it is relative path
2173                         # it is relative to project
2174                         $file = "$projectroot/$project/$file";
2175                 }
2176                 $mime = mimetype_guess_file($filename, $file);
2177         }
2178         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2179         return $mime;
2180 }
2181
2182 sub blob_mimetype {
2183         my $fd = shift;
2184         my $filename = shift;
2185
2186         if ($filename) {
2187                 my $mime = mimetype_guess($filename);
2188                 $mime and return $mime;
2189         }
2190
2191         # just in case
2192         return $default_blob_plain_mimetype unless $fd;
2193
2194         if (-T $fd) {
2195                 return 'text/plain' .
2196                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2197         } elsif (! $filename) {
2198                 return 'application/octet-stream';
2199         } elsif ($filename =~ m/\.png$/i) {
2200                 return 'image/png';
2201         } elsif ($filename =~ m/\.gif$/i) {
2202                 return 'image/gif';
2203         } elsif ($filename =~ m/\.jpe?g$/i) {
2204                 return 'image/jpeg';
2205         } else {
2206                 return 'application/octet-stream';
2207         }
2208 }
2209
2210 ## ======================================================================
2211 ## functions printing HTML: header, footer, error page
2212
2213 sub git_header_html {
2214         my $status = shift || "200 OK";
2215         my $expires = shift;
2216
2217         my $title = "$site_name";
2218         if (defined $project) {
2219                 $title .= " - " . to_utf8($project);
2220                 if (defined $action) {
2221                         $title .= "/$action";
2222                         if (defined $file_name) {
2223                                 $title .= " - " . esc_path($file_name);
2224                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2225                                         $title .= "/";
2226                                 }
2227                         }
2228                 }
2229         }
2230         my $content_type;
2231         # require explicit support from the UA if we are to send the page as
2232         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2233         # we have to do this because MSIE sometimes globs '*/*', pretending to
2234         # support xhtml+xml but choking when it gets what it asked for.
2235         if (defined $cgi->http('HTTP_ACCEPT') &&
2236             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2237             $cgi->Accept('application/xhtml+xml') != 0) {
2238                 $content_type = 'application/xhtml+xml';
2239         } else {
2240                 $content_type = 'text/html';
2241         }
2242         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2243                            -status=> $status, -expires => $expires);
2244         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2245         print <<EOF;
2246 <?xml version="1.0" encoding="utf-8"?>
2247 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2248 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2249 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2250 <!-- git core binaries version $git_version -->
2251 <head>
2252 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2253 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2254 <meta name="robots" content="index, nofollow"/>
2255 <title>$title</title>
2256 EOF
2257 # print out each stylesheet that exist
2258         if (defined $stylesheet) {
2259 #provides backwards capability for those people who define style sheet in a config file
2260                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2261         } else {
2262                 foreach my $stylesheet (@stylesheets) {
2263                         next unless $stylesheet;
2264                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2265                 }
2266         }
2267         if (defined $project) {
2268                 printf('<link rel="alternate" title="%s log RSS feed" '.
2269                        'href="%s" type="application/rss+xml" />'."\n",
2270                        esc_param($project), href(action=>"rss"));
2271                 printf('<link rel="alternate" title="%s log Atom feed" '.
2272                        'href="%s" type="application/atom+xml" />'."\n",
2273                        esc_param($project), href(action=>"atom"));
2274         } else {
2275                 printf('<link rel="alternate" title="%s projects list" '.
2276                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2277                        $site_name, href(project=>undef, action=>"project_index"));
2278                 printf('<link rel="alternate" title="%s projects feeds" '.
2279                        'href="%s" type="text/x-opml"/>'."\n",
2280                        $site_name, href(project=>undef, action=>"opml"));
2281         }
2282         if (defined $favicon) {
2283                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2284         }
2285
2286         print "</head>\n" .
2287               "<body>\n";
2288
2289         if (-f $site_header) {
2290                 open (my $fd, $site_header);
2291                 print <$fd>;
2292                 close $fd;
2293         }
2294
2295         print "<div class=\"page_header\">\n" .
2296               $cgi->a({-href => esc_url($logo_url),
2297                        -title => $logo_label},
2298                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2299         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2300         if (defined $project) {
2301                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2302                 if (defined $action) {
2303                         print " / $action";
2304                 }
2305                 print "\n";
2306         }
2307         print "</div>\n";
2308
2309         my ($have_search) = gitweb_check_feature('search');
2310         if ((defined $project) && ($have_search)) {
2311                 if (!defined $searchtext) {
2312                         $searchtext = "";
2313                 }
2314                 my $search_hash;
2315                 if (defined $hash_base) {
2316                         $search_hash = $hash_base;
2317                 } elsif (defined $hash) {
2318                         $search_hash = $hash;
2319                 } else {
2320                         $search_hash = "HEAD";
2321                 }
2322                 my $action = $my_uri;
2323                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2324                 if ($use_pathinfo) {
2325                         $action .= "/$project";
2326                 } else {
2327                         $cgi->param("p", $project);
2328                 }
2329                 $cgi->param("a", "search");
2330                 $cgi->param("h", $search_hash);
2331                 print $cgi->startform(-method => "get", -action => $action) .
2332                       "<div class=\"search\">\n" .
2333                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2334                       $cgi->hidden(-name => "a") . "\n" .
2335                       $cgi->hidden(-name => "h") . "\n" .
2336                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2337                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2338                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2339                       " search:\n",
2340                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2341                       "</div>" .
2342                       $cgi->end_form() . "\n";
2343         }
2344 }
2345
2346 sub git_footer_html {
2347         print "<div class=\"page_footer\">\n";
2348         if (defined $project) {
2349                 my $descr = git_get_project_description($project);
2350                 if (defined $descr) {
2351                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2352                 }
2353                 print $cgi->a({-href => href(action=>"rss"),
2354                               -class => "rss_logo"}, "RSS") . " ";
2355                 print $cgi->a({-href => href(action=>"atom"),
2356                               -class => "rss_logo"}, "Atom") . "\n";
2357         } else {
2358                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2359                               -class => "rss_logo"}, "OPML") . " ";
2360                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2361                               -class => "rss_logo"}, "TXT") . "\n";
2362         }
2363         print "</div>\n" ;
2364
2365         if (-f $site_footer) {
2366                 open (my $fd, $site_footer);
2367                 print <$fd>;
2368                 close $fd;
2369         }
2370
2371         print "</body>\n" .
2372               "</html>";
2373 }
2374
2375 sub die_error {
2376         my $status = shift || "403 Forbidden";
2377         my $error = shift || "Malformed query, file missing or permission denied";
2378
2379         git_header_html($status);
2380         print <<EOF;
2381 <div class="page_body">
2382 <br /><br />
2383 $status - $error
2384 <br />
2385 </div>
2386 EOF
2387         git_footer_html();
2388         exit;
2389 }
2390
2391 ## ----------------------------------------------------------------------
2392 ## functions printing or outputting HTML: navigation
2393
2394 sub git_print_page_nav {
2395         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2396         $extra = '' if !defined $extra; # pager or formats
2397
2398         my @navs = qw(summary shortlog log commit commitdiff tree);
2399         if ($suppress) {
2400                 @navs = grep { $_ ne $suppress } @navs;
2401         }
2402
2403         my %arg = map { $_ => {action=>$_} } @navs;
2404         if (defined $head) {
2405                 for (qw(commit commitdiff)) {
2406                         $arg{$_}{'hash'} = $head;
2407                 }
2408                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2409                         for (qw(shortlog log)) {
2410                                 $arg{$_}{'hash'} = $head;
2411                         }
2412                 }
2413         }
2414         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2415         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2416
2417         print "<div class=\"page_nav\">\n" .
2418                 (join " | ",
2419                  map { $_ eq $current ?
2420                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2421                  } @navs);
2422         print "<br/>\n$extra<br/>\n" .
2423               "</div>\n";
2424 }
2425
2426 sub format_paging_nav {
2427         my ($action, $hash, $head, $page, $nrevs) = @_;
2428         my $paging_nav;
2429
2430
2431         if ($hash ne $head || $page) {
2432                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2433         } else {
2434                 $paging_nav .= "HEAD";
2435         }
2436
2437         if ($page > 0) {
2438                 $paging_nav .= " &sdot; " .
2439                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2440                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2441         } else {
2442                 $paging_nav .= " &sdot; prev";
2443         }
2444
2445         if ($nrevs >= (100 * ($page+1)-1)) {
2446                 $paging_nav .= " &sdot; " .
2447                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2448                                  -accesskey => "n", -title => "Alt-n"}, "next");
2449         } else {
2450                 $paging_nav .= " &sdot; next";
2451         }
2452
2453         return $paging_nav;
2454 }
2455
2456 ## ......................................................................
2457 ## functions printing or outputting HTML: div
2458
2459 sub git_print_header_div {
2460         my ($action, $title, $hash, $hash_base) = @_;
2461         my %args = ();
2462
2463         $args{'action'} = $action;
2464         $args{'hash'} = $hash if $hash;
2465         $args{'hash_base'} = $hash_base if $hash_base;
2466
2467         print "<div class=\"header\">\n" .
2468               $cgi->a({-href => href(%args), -class => "title"},
2469               $title ? $title : $action) .
2470               "\n</div>\n";
2471 }
2472
2473 #sub git_print_authorship (\%) {
2474 sub git_print_authorship {
2475         my $co = shift;
2476
2477         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2478         print "<div class=\"author_date\">" .
2479               esc_html($co->{'author_name'}) .
2480               " [$ad{'rfc2822'}";
2481         if ($ad{'hour_local'} < 6) {
2482                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2483                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2484         } else {
2485                 printf(" (%02d:%02d %s)",
2486                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2487         }
2488         print "]</div>\n";
2489 }
2490
2491 sub git_print_page_path {
2492         my $name = shift;
2493         my $type = shift;
2494         my $hb = shift;
2495
2496
2497         print "<div class=\"page_path\">";
2498         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2499                       -title => 'tree root'}, to_utf8("[$project]"));
2500         print " / ";
2501         if (defined $name) {
2502                 my @dirname = split '/', $name;
2503                 my $basename = pop @dirname;
2504                 my $fullname = '';
2505
2506                 foreach my $dir (@dirname) {
2507                         $fullname .= ($fullname ? '/' : '') . $dir;
2508                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2509                                                      hash_base=>$hb),
2510                                       -title => $fullname}, esc_path($dir));
2511                         print " / ";
2512                 }
2513                 if (defined $type && $type eq 'blob') {
2514                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2515                                                      hash_base=>$hb),
2516                                       -title => $name}, esc_path($basename));
2517                 } elsif (defined $type && $type eq 'tree') {
2518                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2519                                                      hash_base=>$hb),
2520                                       -title => $name}, esc_path($basename));
2521                         print " / ";
2522                 } else {
2523                         print esc_path($basename);
2524                 }
2525         }
2526         print "<br/></div>\n";
2527 }
2528
2529 # sub git_print_log (\@;%) {
2530 sub git_print_log ($;%) {
2531         my $log = shift;
2532         my %opts = @_;
2533
2534         if ($opts{'-remove_title'}) {
2535                 # remove title, i.e. first line of log
2536                 shift @$log;
2537         }
2538         # remove leading empty lines
2539         while (defined $log->[0] && $log->[0] eq "") {
2540                 shift @$log;
2541         }
2542
2543         # print log
2544         my $signoff = 0;
2545         my $empty = 0;
2546         foreach my $line (@$log) {
2547                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2548                         $signoff = 1;
2549                         $empty = 0;
2550                         if (! $opts{'-remove_signoff'}) {
2551                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2552                                 next;
2553                         } else {
2554                                 # remove signoff lines
2555                                 next;
2556                         }
2557                 } else {
2558                         $signoff = 0;
2559                 }
2560
2561                 # print only one empty line
2562                 # do not print empty line after signoff
2563                 if ($line eq "") {
2564                         next if ($empty || $signoff);
2565                         $empty = 1;
2566                 } else {
2567                         $empty = 0;
2568                 }
2569
2570                 print format_log_line_html($line) . "<br/>\n";
2571         }
2572
2573         if ($opts{'-final_empty_line'}) {
2574                 # end with single empty line
2575                 print "<br/>\n" unless $empty;
2576         }
2577 }
2578
2579 # return link target (what link points to)
2580 sub git_get_link_target {
2581         my $hash = shift;
2582         my $link_target;
2583
2584         # read link
2585         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2586                 or return;
2587         {
2588                 local $/;
2589                 $link_target = <$fd>;
2590         }
2591         close $fd
2592                 or return;
2593
2594         return $link_target;
2595 }
2596
2597 # given link target, and the directory (basedir) the link is in,
2598 # return target of link relative to top directory (top tree);
2599 # return undef if it is not possible (including absolute links).
2600 sub normalize_link_target {
2601         my ($link_target, $basedir, $hash_base) = @_;
2602
2603         # we can normalize symlink target only if $hash_base is provided
2604         return unless $hash_base;
2605
2606         # absolute symlinks (beginning with '/') cannot be normalized
2607         return if (substr($link_target, 0, 1) eq '/');
2608
2609         # normalize link target to path from top (root) tree (dir)
2610         my $path;
2611         if ($basedir) {
2612                 $path = $basedir . '/' . $link_target;
2613         } else {
2614                 # we are in top (root) tree (dir)
2615                 $path = $link_target;
2616         }
2617
2618         # remove //, /./, and /../
2619         my @path_parts;
2620         foreach my $part (split('/', $path)) {
2621                 # discard '.' and ''
2622                 next if (!$part || $part eq '.');
2623                 # handle '..'
2624                 if ($part eq '..') {
2625                         if (@path_parts) {
2626                                 pop @path_parts;
2627                         } else {
2628                                 # link leads outside repository (outside top dir)
2629                                 return;
2630                         }
2631                 } else {
2632                         push @path_parts, $part;
2633                 }
2634         }
2635         $path = join('/', @path_parts);
2636
2637         return $path;
2638 }
2639
2640 # print tree entry (row of git_tree), but without encompassing <tr> element
2641 sub git_print_tree_entry {
2642         my ($t, $basedir, $hash_base, $have_blame) = @_;
2643
2644         my %base_key = ();
2645         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2646
2647         # The format of a table row is: mode list link.  Where mode is
2648         # the mode of the entry, list is the name of the entry, an href,
2649         # and link is the action links of the entry.
2650
2651         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2652         if ($t->{'type'} eq "blob") {
2653                 print "<td class=\"list\">" .
2654                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2655                                                file_name=>"$basedir$t->{'name'}", %base_key),
2656                                 -class => "list"}, esc_path($t->{'name'}));
2657                 if (S_ISLNK(oct $t->{'mode'})) {
2658                         my $link_target = git_get_link_target($t->{'hash'});
2659                         if ($link_target) {
2660                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2661                                 if (defined $norm_target) {
2662                                         print " -> " .
2663                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2664                                                                      file_name=>$norm_target),
2665                                                        -title => $norm_target}, esc_path($link_target));
2666                                 } else {
2667                                         print " -> " . esc_path($link_target);
2668                                 }
2669                         }
2670                 }
2671                 print "</td>\n";
2672                 print "<td class=\"link\">";
2673                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2674                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2675                               "blob");
2676                 if ($have_blame) {
2677                         print " | " .
2678                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2679                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2680                                       "blame");
2681                 }
2682                 if (defined $hash_base) {
2683                         print " | " .
2684                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2685                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2686                                       "history");
2687                 }
2688                 print " | " .
2689                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2690                                                file_name=>"$basedir$t->{'name'}")},
2691                                 "raw");
2692                 print "</td>\n";
2693
2694         } elsif ($t->{'type'} eq "tree") {
2695                 print "<td class=\"list\">";
2696                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2697                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2698                               esc_path($t->{'name'}));
2699                 print "</td>\n";
2700                 print "<td class=\"link\">";
2701                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2702                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2703                               "tree");
2704                 if (defined $hash_base) {
2705                         print " | " .
2706                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2707                                                      file_name=>"$basedir$t->{'name'}")},
2708                                       "history");
2709                 }
2710                 print "</td>\n";
2711         }
2712 }
2713
2714 ## ......................................................................
2715 ## functions printing large fragments of HTML
2716
2717 sub fill_from_file_info {
2718         my ($diff, @parents) = @_;
2719
2720         $diff->{'from_file'} = [ ];
2721         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2722         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2723                 if ($diff->{'status'}[$i] eq 'R' ||
2724                     $diff->{'status'}[$i] eq 'C') {
2725                         $diff->{'from_file'}[$i] =
2726                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2727                 }
2728         }
2729
2730         return $diff;
2731 }
2732
2733 # parameters can be strings, or references to arrays of strings
2734 sub from_ids_eq {
2735         my ($a, $b) = @_;
2736
2737         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2738                 for (my $i = 0; $i < @$a; ++$i) {
2739                         return 0 unless ($a->[$i] eq $b->[$i]);
2740                 }
2741                 return 1;
2742         } elsif (!ref($a) && !ref($b)) {
2743                 return $a eq $b;
2744         } else {
2745                 return 0;
2746         }
2747 }
2748
2749 sub is_deleted {
2750         my $diffinfo = shift;
2751
2752         return $diffinfo->{'to_id'} eq ('0' x 40);
2753 }
2754
2755 sub git_difftree_body {
2756         my ($difftree, $hash, @parents) = @_;
2757         my ($parent) = $parents[0];
2758         my ($have_blame) = gitweb_check_feature('blame');
2759         print "<div class=\"list_head\">\n";
2760         if ($#{$difftree} > 10) {
2761                 print(($#{$difftree} + 1) . " files changed:\n");
2762         }
2763         print "</div>\n";
2764
2765         print "<table class=\"" .
2766               (@parents > 1 ? "combined " : "") .
2767               "diff_tree\">\n";
2768
2769         # header only for combined diff in 'commitdiff' view
2770         my $has_header = @parents > 1 && $action eq 'commitdiff';
2771         if ($has_header) {
2772                 # table header
2773                 print "<thead><tr>\n" .
2774                        "<th></th><th></th>\n"; # filename, patchN link
2775                 for (my $i = 0; $i < @parents; $i++) {
2776                         my $par = $parents[$i];
2777                         print "<th>" .
2778                               $cgi->a({-href => href(action=>"commitdiff",
2779                                                      hash=>$hash, hash_parent=>$par),
2780                                        -title => 'commitdiff to parent number ' .
2781                                                   ($i+1) . ': ' . substr($par,0,7)},
2782                                       $i+1) .
2783                               "&nbsp;</th>\n";
2784                 }
2785                 print "</tr></thead>\n<tbody>\n";
2786         }
2787
2788         my $alternate = 1;
2789         my $patchno = 0;
2790         foreach my $line (@{$difftree}) {
2791                 my $diff;
2792                 if (ref($line) eq "HASH") {
2793                         # pre-parsed (or generated by hand)
2794                         $diff = $line;
2795                 } else {
2796                         $diff = parse_difftree_raw_line($line);
2797                 }
2798
2799                 if ($alternate) {
2800                         print "<tr class=\"dark\">\n";
2801                 } else {
2802                         print "<tr class=\"light\">\n";
2803                 }
2804                 $alternate ^= 1;
2805
2806                 if (exists $diff->{'nparents'}) { # combined diff
2807
2808                         fill_from_file_info($diff, @parents)
2809                                 unless exists $diff->{'from_file'};
2810
2811                         if (!is_deleted($diff)) {
2812                                 # file exists in the result (child) commit
2813                                 print "<td>" .
2814                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2815                                                              file_name=>$diff->{'to_file'},
2816                                                              hash_base=>$hash),
2817                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2818                                       "</td>\n";
2819                         } else {
2820                                 print "<td>" .
2821                                       esc_path($diff->{'to_file'}) .
2822                                       "</td>\n";
2823                         }
2824
2825                         if ($action eq 'commitdiff') {
2826                                 # link to patch
2827                                 $patchno++;
2828                                 print "<td class=\"link\">" .
2829                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2830                                       " | " .
2831                                       "</td>\n";
2832                         }
2833
2834                         my $has_history = 0;
2835                         my $not_deleted = 0;
2836                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2837                                 my $hash_parent = $parents[$i];
2838                                 my $from_hash = $diff->{'from_id'}[$i];
2839                                 my $from_path = $diff->{'from_file'}[$i];
2840                                 my $status = $diff->{'status'}[$i];
2841
2842                                 $has_history ||= ($status ne 'A');
2843                                 $not_deleted ||= ($status ne 'D');
2844
2845                                 if ($status eq 'A') {
2846                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2847                                 } elsif ($status eq 'D') {
2848                                         print "<td class=\"link\">" .
2849                                               $cgi->a({-href => href(action=>"blob",
2850                                                                      hash_base=>$hash,
2851                                                                      hash=>$from_hash,
2852                                                                      file_name=>$from_path)},
2853                                                       "blob" . ($i+1)) .
2854                                               " | </td>\n";
2855                                 } else {
2856                                         if ($diff->{'to_id'} eq $from_hash) {
2857                                                 print "<td class=\"link nochange\">";
2858                                         } else {
2859                                                 print "<td class=\"link\">";
2860                                         }
2861                                         print $cgi->a({-href => href(action=>"blobdiff",
2862                                                                      hash=>$diff->{'to_id'},
2863                                                                      hash_parent=>$from_hash,
2864                                                                      hash_base=>$hash,
2865                                                                      hash_parent_base=>$hash_parent,
2866                                                                      file_name=>$diff->{'to_file'},
2867                                                                      file_parent=>$from_path)},
2868                                                       "diff" . ($i+1)) .
2869                                               " | </td>\n";
2870                                 }
2871                         }
2872
2873                         print "<td class=\"link\">";
2874                         if ($not_deleted) {
2875                                 print $cgi->a({-href => href(action=>"blob",
2876                                                              hash=>$diff->{'to_id'},
2877                                                              file_name=>$diff->{'to_file'},
2878                                                              hash_base=>$hash)},
2879                                               "blob");
2880                                 print " | " if ($has_history);
2881                         }
2882                         if ($has_history) {
2883                                 print $cgi->a({-href => href(action=>"history",
2884                                                              file_name=>$diff->{'to_file'},
2885                                                              hash_base=>$hash)},
2886                                               "history");
2887                         }
2888                         print "</td>\n";
2889
2890                         print "</tr>\n";
2891                         next; # instead of 'else' clause, to avoid extra indent
2892                 }
2893                 # else ordinary diff
2894
2895                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2896                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2897                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2898                         $to_mode_oct = oct $diff->{'to_mode'};
2899                         if (S_ISREG($to_mode_oct)) { # only for regular file
2900                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2901                         }
2902                         $to_file_type = file_type($diff->{'to_mode'});
2903                 }
2904                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2905                         $from_mode_oct = oct $diff->{'from_mode'};
2906                         if (S_ISREG($to_mode_oct)) { # only for regular file
2907                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2908                         }
2909                         $from_file_type = file_type($diff->{'from_mode'});
2910                 }
2911
2912                 if ($diff->{'status'} eq "A") { # created
2913                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2914                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2915                         $mode_chng   .= "]</span>";
2916                         print "<td>";
2917                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2918                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2919                                       -class => "list"}, esc_path($diff->{'file'}));
2920                         print "</td>\n";
2921                         print "<td>$mode_chng</td>\n";
2922                         print "<td class=\"link\">";
2923                         if ($action eq 'commitdiff') {
2924                                 # link to patch
2925                                 $patchno++;
2926                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2927                                 print " | ";
2928                         }
2929                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2930                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2931                                       "blob");
2932                         print "</td>\n";
2933
2934                 } elsif ($diff->{'status'} eq "D") { # deleted
2935                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2936                         print "<td>";
2937                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2938                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2939                                        -class => "list"}, esc_path($diff->{'file'}));
2940                         print "</td>\n";
2941                         print "<td>$mode_chng</td>\n";
2942                         print "<td class=\"link\">";
2943                         if ($action eq 'commitdiff') {
2944                                 # link to patch
2945                                 $patchno++;
2946                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2947                                 print " | ";
2948                         }
2949                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2950                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2951                                       "blob") . " | ";
2952                         if ($have_blame) {
2953                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2954                                                              file_name=>$diff->{'file'})},
2955                                               "blame") . " | ";
2956                         }
2957                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
2958                                                      file_name=>$diff->{'file'})},
2959                                       "history");
2960                         print "</td>\n";
2961
2962                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
2963                         my $mode_chnge = "";
2964                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
2965                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
2966                                 if ($from_file_type ne $to_file_type) {
2967                                         $mode_chnge .= " from $from_file_type to $to_file_type";
2968                                 }
2969                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
2970                                         if ($from_mode_str && $to_mode_str) {
2971                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
2972                                         } elsif ($to_mode_str) {
2973                                                 $mode_chnge .= " mode: $to_mode_str";
2974                                         }
2975                                 }
2976                                 $mode_chnge .= "]</span>\n";
2977                         }
2978                         print "<td>";
2979                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2980                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2981                                       -class => "list"}, esc_path($diff->{'file'}));
2982                         print "</td>\n";
2983                         print "<td>$mode_chnge</td>\n";
2984                         print "<td class=\"link\">";
2985                         if ($action eq 'commitdiff') {
2986                                 # link to patch
2987                                 $patchno++;
2988                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
2989                                       " | ";
2990                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
2991                                 # "commit" view and modified file (not onlu mode changed)
2992                                 print $cgi->a({-href => href(action=>"blobdiff",
2993                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
2994                                                              hash_base=>$hash, hash_parent_base=>$parent,
2995                                                              file_name=>$diff->{'file'})},
2996                                               "diff") .
2997                                       " | ";
2998                         }
2999                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3000                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3001                                        "blob") . " | ";
3002                         if ($have_blame) {
3003                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3004                                                              file_name=>$diff->{'file'})},
3005                                               "blame") . " | ";
3006                         }
3007                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3008                                                      file_name=>$diff->{'file'})},
3009                                       "history");
3010                         print "</td>\n";
3011
3012                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3013                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3014                         my $nstatus = $status_name{$diff->{'status'}};
3015                         my $mode_chng = "";
3016                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3017                                 # mode also for directories, so we cannot use $to_mode_str
3018                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3019                         }
3020                         print "<td>" .
3021                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3022                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3023                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3024                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3025                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3026                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3027                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3028                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3029                               "<td class=\"link\">";
3030                         if ($action eq 'commitdiff') {
3031                                 # link to patch
3032                                 $patchno++;
3033                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3034                                       " | ";
3035                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3036                                 # "commit" view and modified file (not only pure rename or copy)
3037                                 print $cgi->a({-href => href(action=>"blobdiff",
3038                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3039                                                              hash_base=>$hash, hash_parent_base=>$parent,
3040                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3041                                               "diff") .
3042                                       " | ";
3043                         }
3044                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3045                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3046                                       "blob") . " | ";
3047                         if ($have_blame) {
3048                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3049                                                              file_name=>$diff->{'to_file'})},
3050                                               "blame") . " | ";
3051                         }
3052                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3053                                                     file_name=>$diff->{'to_file'})},
3054                                       "history");
3055                         print "</td>\n";
3056
3057                 } # we should not encounter Unmerged (U) or Unknown (X) status
3058                 print "</tr>\n";
3059         }
3060         print "</tbody>" if $has_header;
3061         print "</table>\n";
3062 }
3063
3064 sub git_patchset_body {
3065         my ($fd, $difftree, $hash, @hash_parents) = @_;
3066         my ($hash_parent) = $hash_parents[0];
3067
3068         my $patch_idx = 0;
3069         my $patch_number = 0;
3070         my $patch_line;
3071         my $diffinfo;
3072         my (%from, %to);
3073
3074         print "<div class=\"patchset\">\n";
3075
3076         # skip to first patch
3077         while ($patch_line = <$fd>) {
3078                 chomp $patch_line;
3079
3080                 last if ($patch_line =~ m/^diff /);
3081         }
3082
3083  PATCH:
3084         while ($patch_line) {
3085                 my @diff_header;
3086                 my ($from_id, $to_id);
3087
3088                 # git diff header
3089                 #assert($patch_line =~ m/^diff /) if DEBUG;
3090                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3091                 $patch_number++;
3092                 push @diff_header, $patch_line;
3093
3094                 # extended diff header
3095         EXTENDED_HEADER:
3096                 while ($patch_line = <$fd>) {
3097                         chomp $patch_line;
3098
3099                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3100
3101                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3102                                 $from_id = $1;
3103                                 $to_id   = $2;
3104                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3105                                 $from_id = [ split(',', $1) ];
3106                                 $to_id   = $2;
3107                         }
3108
3109                         push @diff_header, $patch_line;
3110                 }
3111                 my $last_patch_line = $patch_line;
3112
3113                 # check if current patch belong to current raw line
3114                 # and parse raw git-diff line if needed
3115                 if (defined $diffinfo &&
3116                     defined $from_id && defined $to_id &&
3117                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3118                     $diffinfo->{'to_id'} eq $to_id) {
3119                         # this is continuation of a split patch
3120                         print "<div class=\"patch cont\">\n";
3121                 } else {
3122                         # advance raw git-diff output if needed
3123                         $patch_idx++ if defined $diffinfo;
3124
3125                         # compact combined diff output can have some patches skipped
3126                         # find which patch (using pathname of result) we are at now
3127                         my $to_name;
3128                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3129                                 $to_name = $1;
3130                         }
3131
3132                         do {
3133                                 # read and prepare patch information
3134                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3135                                         # pre-parsed (or generated by hand)
3136                                         $diffinfo = $difftree->[$patch_idx];
3137                                 } else {
3138                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3139                                 }
3140
3141                                 # check if current raw line has no patch (it got simplified)
3142                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3143                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3144                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3145                                               "</div>\n";  # class="patch"
3146
3147                                         $patch_idx++;
3148                                         $patch_number++;
3149                                 }
3150                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3151                                  $patch_idx > $#$difftree);
3152                         # modifies %from, %to hashes
3153                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3154                         if ($diffinfo->{'nparents'}) {
3155                                 # combined diff
3156                                 $from{'file'} = [];
3157                                 $from{'href'} = [];
3158                                 fill_from_file_info($diffinfo, @hash_parents)
3159                                         unless exists $diffinfo->{'from_file'};
3160                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3161                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3162                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3163                                                 $from{'href'}[$i] = href(action=>"blob",
3164                                                                          hash_base=>$hash_parents[$i],
3165                                                                          hash=>$diffinfo->{'from_id'}[$i],
3166                                                                          file_name=>$from{'file'}[$i]);
3167                                         } else {
3168                                                 $from{'href'}[$i] = undef;
3169                                         }
3170                                 }
3171                         } else {
3172                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3173                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3174                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3175                                                              hash=>$diffinfo->{'from_id'},
3176                                                              file_name=>$from{'file'});
3177                                 } else {
3178                                         delete $from{'href'};
3179                                 }
3180                         }
3181
3182                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3183                         if (!is_deleted($diffinfo)) { # file exists in result
3184                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3185                                                    hash=>$diffinfo->{'to_id'},
3186                                                    file_name=>$to{'file'});
3187                         } else {
3188                                 delete $to{'href'};
3189                         }
3190                         # this is first patch for raw difftree line with $patch_idx index
3191                         # we index @$difftree array from 0, but number patches from 1
3192                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3193                 }
3194
3195                 # print "git diff" header
3196                 $patch_line = shift @diff_header;
3197                 print format_git_diff_header_line($patch_line, $diffinfo,
3198                                                   \%from, \%to);
3199
3200                 # print extended diff header
3201                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3202         EXTENDED_HEADER:
3203                 foreach $patch_line (@diff_header) {
3204                         print format_extended_diff_header_line($patch_line, $diffinfo,
3205                                                                \%from, \%to);
3206                 }
3207                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3208
3209                 # from-file/to-file diff header
3210                 $patch_line = $last_patch_line;
3211                 if (! $patch_line) {
3212                         print "</div>\n"; # class="patch"
3213                         last PATCH;
3214                 }
3215                 next PATCH if ($patch_line =~ m/^diff /);
3216                 #assert($patch_line =~ m/^---/) if DEBUG;
3217                 #assert($patch_line eq $last_patch_line) if DEBUG;
3218
3219                 $patch_line = <$fd>;
3220                 chomp $patch_line;
3221                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3222
3223                 print format_diff_from_to_header($last_patch_line, $patch_line,
3224                                                  $diffinfo, \%from, \%to,
3225                                                  @hash_parents);
3226
3227                 # the patch itself
3228         LINE:
3229                 while ($patch_line = <$fd>) {
3230                         chomp $patch_line;
3231
3232                         next PATCH if ($patch_line =~ m/^diff /);
3233
3234                         print format_diff_line($patch_line, \%from, \%to);
3235                 }
3236
3237         } continue {
3238                 print "</div>\n"; # class="patch"
3239         }
3240
3241         # for compact combined (--cc) format, with chunk and patch simpliciaction
3242         # patchset might be empty, but there might be unprocessed raw lines
3243         for ($patch_idx++ if $patch_number > 0;
3244              $patch_idx < @$difftree;
3245              $patch_idx++) {
3246                 # read and prepare patch information
3247                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3248                         # pre-parsed (or generated by hand)
3249                         $diffinfo = $difftree->[$patch_idx];
3250                 } else {
3251                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3252                 }
3253
3254                 # generate anchor for "patch" links in difftree / whatchanged part
3255                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3256                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3257                       "</div>\n";  # class="patch"
3258
3259                 $patch_number++;
3260         }
3261
3262         if ($patch_number == 0) {
3263                 if (@hash_parents > 1) {
3264                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3265                 } else {
3266                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3267                 }
3268         }
3269
3270         print "</div>\n"; # class="patchset"
3271 }
3272
3273 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3274
3275 sub git_project_list_body {
3276         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3277
3278         my ($check_forks) = gitweb_check_feature('forks');
3279
3280         my @projects;
3281         foreach my $pr (@$projlist) {
3282                 my (@aa) = git_get_last_activity($pr->{'path'});
3283                 unless (@aa) {
3284                         next;
3285                 }
3286                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3287                 if (!defined $pr->{'descr'}) {
3288                         my $descr = git_get_project_description($pr->{'path'}) || "";
3289                         $pr->{'descr_long'} = to_utf8($descr);
3290                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3291                 }
3292                 if (!defined $pr->{'owner'}) {
3293                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3294                 }
3295                 if ($check_forks) {
3296                         my $pname = $pr->{'path'};
3297                         if (($pname =~ s/\.git$//) &&
3298                             ($pname !~ /\/$/) &&
3299                             (-d "$projectroot/$pname")) {
3300                                 $pr->{'forks'} = "-d $projectroot/$pname";
3301                         }
3302                         else {
3303                                 $pr->{'forks'} = 0;
3304                         }
3305                 }
3306                 push @projects, $pr;
3307         }
3308
3309         $order ||= $default_projects_order;
3310         $from = 0 unless defined $from;
3311         $to = $#projects if (!defined $to || $#projects < $to);
3312
3313         print "<table class=\"project_list\">\n";
3314         unless ($no_header) {
3315                 print "<tr>\n";
3316                 if ($check_forks) {
3317                         print "<th></th>\n";
3318                 }
3319                 if ($order eq "project") {
3320                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3321                         print "<th>Project</th>\n";
3322                 } else {
3323                         print "<th>" .
3324                               $cgi->a({-href => href(project=>undef, order=>'project'),
3325                                        -class => "header"}, "Project") .
3326                               "</th>\n";
3327                 }
3328                 if ($order eq "descr") {
3329                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3330                         print "<th>Description</th>\n";
3331                 } else {
3332                         print "<th>" .
3333                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3334                                        -class => "header"}, "Description") .
3335                               "</th>\n";
3336                 }
3337                 if ($order eq "owner") {
3338                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3339                         print "<th>Owner</th>\n";
3340                 } else {
3341                         print "<th>" .
3342                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3343                                        -class => "header"}, "Owner") .
3344                               "</th>\n";
3345                 }
3346                 if ($order eq "age") {
3347                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3348                         print "<th>Last Change</th>\n";
3349                 } else {
3350                         print "<th>" .
3351                               $cgi->a({-href => href(project=>undef, order=>'age'),
3352                                        -class => "header"}, "Last Change") .
3353                               "</th>\n";
3354                 }
3355                 print "<th></th>\n" .
3356                       "</tr>\n";
3357         }
3358         my $alternate = 1;
3359         for (my $i = $from; $i <= $to; $i++) {
3360                 my $pr = $projects[$i];
3361                 if ($alternate) {
3362                         print "<tr class=\"dark\">\n";
3363                 } else {
3364                         print "<tr class=\"light\">\n";
3365                 }
3366                 $alternate ^= 1;
3367                 if ($check_forks) {
3368                         print "<td>";
3369                         if ($pr->{'forks'}) {
3370                                 print "<!-- $pr->{'forks'} -->\n";
3371                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3372                         }
3373                         print "</td>\n";
3374                 }
3375                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3376                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3377                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3378                                         -class => "list", -title => $pr->{'descr_long'}},
3379                                         esc_html($pr->{'descr'})) . "</td>\n" .
3380                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
3381                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3382                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3383                       "<td class=\"link\">" .
3384                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3385                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3386                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3387                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3388                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3389                       "</td>\n" .
3390                       "</tr>\n";
3391         }
3392         if (defined $extra) {
3393                 print "<tr>\n";
3394                 if ($check_forks) {
3395                         print "<td></td>\n";
3396                 }
3397                 print "<td colspan=\"5\">$extra</td>\n" .
3398                       "</tr>\n";
3399         }
3400         print "</table>\n";
3401 }
3402
3403 sub git_shortlog_body {
3404         # uses global variable $project
3405         my ($commitlist, $from, $to, $refs, $extra) = @_;
3406
3407         $from = 0 unless defined $from;
3408         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3409
3410         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3411         my $alternate = 1;
3412         for (my $i = $from; $i <= $to; $i++) {
3413                 my %co = %{$commitlist->[$i]};
3414                 my $commit = $co{'id'};
3415                 my $ref = format_ref_marker($refs, $commit);
3416                 if ($alternate) {
3417                         print "<tr class=\"dark\">\n";
3418                 } else {
3419                         print "<tr class=\"light\">\n";
3420                 }
3421                 $alternate ^= 1;
3422                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3423                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3424                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3425                       "<td>";
3426                 print format_subject_html($co{'title'}, $co{'title_short'},
3427                                           href(action=>"commit", hash=>$commit), $ref);
3428                 print "</td>\n" .
3429                       "<td class=\"link\">" .
3430                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3431                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3432                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3433                 my $snapshot_links = format_snapshot_links($commit);
3434                 if (defined $snapshot_links) {
3435                         print " | " . $snapshot_links;
3436                 }
3437                 print "</td>\n" .
3438                       "</tr>\n";
3439         }
3440         if (defined $extra) {
3441                 print "<tr>\n" .
3442                       "<td colspan=\"4\">$extra</td>\n" .
3443                       "</tr>\n";
3444         }
3445         print "</table>\n";
3446 }
3447
3448 sub git_history_body {
3449         # Warning: assumes constant type (blob or tree) during history
3450         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3451
3452         $from = 0 unless defined $from;
3453         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3454
3455         print "<table class=\"history\" cellspacing=\"0\">\n";
3456         my $alternate = 1;
3457         for (my $i = $from; $i <= $to; $i++) {
3458                 my %co = %{$commitlist->[$i]};
3459                 if (!%co) {
3460                         next;
3461                 }
3462                 my $commit = $co{'id'};
3463
3464                 my $ref = format_ref_marker($refs, $commit);
3465
3466                 if ($alternate) {
3467                         print "<tr class=\"dark\">\n";
3468                 } else {
3469                         print "<tr class=\"light\">\n";
3470                 }
3471                 $alternate ^= 1;
3472                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3473                       # shortlog uses      chop_str($co{'author_name'}, 10)
3474                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3475                       "<td>";
3476                 # originally git_history used chop_str($co{'title'}, 50)
3477                 print format_subject_html($co{'title'}, $co{'title_short'},
3478                                           href(action=>"commit", hash=>$commit), $ref);
3479                 print "</td>\n" .
3480                       "<td class=\"link\">" .
3481                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3482                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3483
3484                 if ($ftype eq 'blob') {
3485                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3486                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3487                         if (defined $blob_current && defined $blob_parent &&
3488                                         $blob_current ne $blob_parent) {
3489                                 print " | " .
3490                                         $cgi->a({-href => href(action=>"blobdiff",
3491                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3492                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3493                                                                file_name=>$file_name)},
3494                                                 "diff to current");
3495                         }
3496                 }
3497                 print "</td>\n" .
3498                       "</tr>\n";
3499         }
3500         if (defined $extra) {
3501                 print "<tr>\n" .
3502                       "<td colspan=\"4\">$extra</td>\n" .
3503                       "</tr>\n";
3504         }
3505         print "</table>\n";
3506 }
3507
3508 sub git_tags_body {
3509         # uses global variable $project
3510         my ($taglist, $from, $to, $extra) = @_;
3511         $from = 0 unless defined $from;
3512         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3513
3514         print "<table class=\"tags\" cellspacing=\"0\">\n";
3515         my $alternate = 1;
3516         for (my $i = $from; $i <= $to; $i++) {
3517                 my $entry = $taglist->[$i];
3518                 my %tag = %$entry;
3519                 my $comment = $tag{'subject'};
3520                 my $comment_short;
3521                 if (defined $comment) {
3522                         $comment_short = chop_str($comment, 30, 5);
3523                 }
3524                 if ($alternate) {
3525                         print "<tr class=\"dark\">\n";
3526                 } else {
3527                         print "<tr class=\"light\">\n";
3528                 }
3529                 $alternate ^= 1;
3530                 if (defined $tag{'age'}) {
3531                         print "<td><i>$tag{'age'}</i></td>\n";
3532                 } else {
3533                         print "<td></td>\n";
3534                 }
3535                 print "<td>" .
3536                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3537                                -class => "list name"}, esc_html($tag{'name'})) .
3538                       "</td>\n" .
3539                       "<td>";
3540                 if (defined $comment) {
3541                         print format_subject_html($comment, $comment_short,
3542                                                   href(action=>"tag", hash=>$tag{'id'}));
3543                 }
3544                 print "</td>\n" .
3545                       "<td class=\"selflink\">";
3546                 if ($tag{'type'} eq "tag") {
3547                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3548                 } else {
3549                         print "&nbsp;";
3550                 }
3551                 print "</td>\n" .
3552                       "<td class=\"link\">" . " | " .
3553                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3554                 if ($tag{'reftype'} eq "commit") {
3555                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3556                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3557                 } elsif ($tag{'reftype'} eq "blob") {
3558                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3559                 }
3560                 print "</td>\n" .
3561                       "</tr>";
3562         }
3563         if (defined $extra) {
3564                 print "<tr>\n" .
3565                       "<td colspan=\"5\">$extra</td>\n" .
3566                       "</tr>\n";
3567         }
3568         print "</table>\n";
3569 }
3570
3571 sub git_heads_body {
3572         # uses global variable $project
3573         my ($headlist, $head, $from, $to, $extra) = @_;
3574         $from = 0 unless defined $from;
3575         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3576
3577         print "<table class=\"heads\" cellspacing=\"0\">\n";
3578         my $alternate = 1;
3579         for (my $i = $from; $i <= $to; $i++) {
3580                 my $entry = $headlist->[$i];
3581                 my %ref = %$entry;
3582                 my $curr = $ref{'id'} eq $head;
3583                 if ($alternate) {
3584                         print "<tr class=\"dark\">\n";
3585                 } else {
3586                         print "<tr class=\"light\">\n";
3587                 }
3588                 $alternate ^= 1;
3589                 print "<td><i>$ref{'age'}</i></td>\n" .
3590                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3591                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3592                                -class => "list name"},esc_html($ref{'name'})) .
3593                       "</td>\n" .
3594                       "<td class=\"link\">" .
3595                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3596                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3597                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3598                       "</td>\n" .
3599                       "</tr>";
3600         }
3601         if (defined $extra) {
3602                 print "<tr>\n" .
3603                       "<td colspan=\"3\">$extra</td>\n" .
3604                       "</tr>\n";
3605         }
3606         print "</table>\n";
3607 }
3608
3609 sub git_search_grep_body {
3610         my ($commitlist, $from, $to, $extra) = @_;
3611         $from = 0 unless defined $from;
3612         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3613
3614         print "<table class=\"grep\" cellspacing=\"0\">\n";
3615         my $alternate = 1;
3616         for (my $i = $from; $i <= $to; $i++) {
3617                 my %co = %{$commitlist->[$i]};
3618                 if (!%co) {
3619                         next;
3620                 }
3621                 my $commit = $co{'id'};
3622                 if ($alternate) {
3623                         print "<tr class=\"dark\">\n";
3624                 } else {
3625                         print "<tr class=\"light\">\n";
3626                 }
3627                 $alternate ^= 1;
3628                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3629                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3630                       "<td>" .
3631                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3632                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3633                 my $comment = $co{'comment'};
3634                 foreach my $line (@$comment) {
3635                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3636                                 my $lead = esc_html($1) || "";
3637                                 $lead = chop_str($lead, 30, 10);
3638                                 my $match = esc_html($2) || "";
3639                                 my $trail = esc_html($3) || "";
3640                                 $trail = chop_str($trail, 30, 10);
3641                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3642                                 print chop_str($text, 80, 5) . "<br/>\n";
3643                         }
3644                 }
3645                 print "</td>\n" .
3646                       "<td class=\"link\">" .
3647                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3648                       " | " .
3649                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3650                 print "</td>\n" .
3651                       "</tr>\n";
3652         }
3653         if (defined $extra) {
3654                 print "<tr>\n" .
3655                       "<td colspan=\"3\">$extra</td>\n" .
3656                       "</tr>\n";
3657         }
3658         print "</table>\n";
3659 }
3660
3661 ## ======================================================================
3662 ## ======================================================================
3663 ## actions
3664
3665 sub git_project_list {
3666         my $order = $cgi->param('o');
3667         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3668                 die_error(undef, "Unknown order parameter");
3669         }
3670
3671         my @list = git_get_projects_list();
3672         if (!@list) {
3673                 die_error(undef, "No projects found");
3674         }
3675
3676         git_header_html();
3677         if (-f $home_text) {
3678                 print "<div class=\"index_include\">\n";
3679                 open (my $fd, $home_text);
3680                 print <$fd>;
3681                 close $fd;
3682                 print "</div>\n";
3683         }
3684         git_project_list_body(\@list, $order);
3685         git_footer_html();
3686 }
3687
3688 sub git_forks {
3689         my $order = $cgi->param('o');
3690         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3691                 die_error(undef, "Unknown order parameter");
3692         }
3693
3694         my @list = git_get_projects_list($project);
3695         if (!@list) {
3696                 die_error(undef, "No forks found");
3697         }
3698
3699         git_header_html();
3700         git_print_page_nav('','');
3701         git_print_header_div('summary', "$project forks");
3702         git_project_list_body(\@list, $order);
3703         git_footer_html();
3704 }
3705
3706 sub git_project_index {
3707         my @projects = git_get_projects_list($project);
3708
3709         print $cgi->header(
3710                 -type => 'text/plain',
3711                 -charset => 'utf-8',
3712                 -content_disposition => 'inline; filename="index.aux"');
3713
3714         foreach my $pr (@projects) {
3715                 if (!exists $pr->{'owner'}) {
3716                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3717                 }
3718
3719                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3720                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3721                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3722                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3723                 $path  =~ s/ /\+/g;
3724                 $owner =~ s/ /\+/g;
3725
3726                 print "$path $owner\n";
3727         }
3728 }
3729
3730 sub git_summary {
3731         my $descr = git_get_project_description($project) || "none";
3732         my %co = parse_commit("HEAD");
3733         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3734         my $head = $co{'id'};
3735
3736         my $owner = git_get_project_owner($project);
3737
3738         my $refs = git_get_references();
3739         # These get_*_list functions return one more to allow us to see if
3740         # there are more ...
3741         my @taglist  = git_get_tags_list(16);
3742         my @headlist = git_get_heads_list(16);
3743         my @forklist;
3744         my ($check_forks) = gitweb_check_feature('forks');
3745
3746         if ($check_forks) {
3747                 @forklist = git_get_projects_list($project);
3748         }
3749
3750         git_header_html();
3751         git_print_page_nav('summary','', $head);
3752
3753         print "<div class=\"title\">&nbsp;</div>\n";
3754         print "<table cellspacing=\"0\">\n" .
3755               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3756               "<tr><td>owner</td><td>$owner</td></tr>\n";
3757         if (defined $cd{'rfc2822'}) {
3758                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3759         }
3760
3761         # use per project git URL list in $projectroot/$project/cloneurl
3762         # or make project git URL from git base URL and project name
3763         my $url_tag = "URL";
3764         my @url_list = git_get_project_url_list($project);
3765         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3766         foreach my $git_url (@url_list) {
3767                 next unless $git_url;
3768                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3769                 $url_tag = "";
3770         }
3771         print "</table>\n";
3772
3773         if (-s "$projectroot/$project/README.html") {
3774                 if (open my $fd, "$projectroot/$project/README.html") {
3775                         print "<div class=\"title\">readme</div>\n";
3776                         print $_ while (<$fd>);
3777                         close $fd;
3778                 }
3779         }
3780
3781         # we need to request one more than 16 (0..15) to check if
3782         # those 16 are all
3783         my @commitlist = $head ? parse_commits($head, 17) : ();
3784         if (@commitlist) {
3785                 git_print_header_div('shortlog');
3786                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3787                                   $#commitlist <=  15 ? undef :
3788                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3789         }
3790
3791         if (@taglist) {
3792                 git_print_header_div('tags');
3793                 git_tags_body(\@taglist, 0, 15,
3794                               $#taglist <=  15 ? undef :
3795                               $cgi->a({-href => href(action=>"tags")}, "..."));
3796         }
3797
3798         if (@headlist) {
3799                 git_print_header_div('heads');
3800                 git_heads_body(\@headlist, $head, 0, 15,
3801                                $#headlist <= 15 ? undef :
3802                                $cgi->a({-href => href(action=>"heads")}, "..."));
3803         }
3804
3805         if (@forklist) {
3806                 git_print_header_div('forks');
3807                 git_project_list_body(\@forklist, undef, 0, 15,
3808                                       $#forklist <= 15 ? undef :
3809                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3810                                       'noheader');
3811         }
3812
3813         git_footer_html();
3814 }
3815
3816 sub git_tag {
3817         my $head = git_get_head_hash($project);
3818         git_header_html();
3819         git_print_page_nav('','', $head,undef,$head);
3820         my %tag = parse_tag($hash);
3821
3822         if (! %tag) {
3823                 die_error(undef, "Unknown tag object");
3824         }
3825
3826         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3827         print "<div class=\"title_text\">\n" .
3828               "<table cellspacing=\"0\">\n" .
3829               "<tr>\n" .
3830               "<td>object</td>\n" .
3831               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3832                                $tag{'object'}) . "</td>\n" .
3833               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3834                                               $tag{'type'}) . "</td>\n" .
3835               "</tr>\n";
3836         if (defined($tag{'author'})) {
3837                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3838                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3839                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3840                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3841                         "</td></tr>\n";
3842         }
3843         print "</table>\n\n" .
3844               "</div>\n";
3845         print "<div class=\"page_body\">";
3846         my $comment = $tag{'comment'};
3847         foreach my $line (@$comment) {
3848                 chomp $line;
3849                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3850         }
3851         print "</div>\n";
3852         git_footer_html();
3853 }
3854
3855 sub git_blame2 {
3856         my $fd;
3857         my $ftype;
3858
3859         my ($have_blame) = gitweb_check_feature('blame');
3860         if (!$have_blame) {
3861                 die_error('403 Permission denied', "Permission denied");
3862         }
3863         die_error('404 Not Found', "File name not defined") if (!$file_name);
3864         $hash_base ||= git_get_head_hash($project);
3865         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3866         my %co = parse_commit($hash_base)
3867                 or die_error(undef, "Reading commit failed");
3868         if (!defined $hash) {
3869                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3870                         or die_error(undef, "Error looking up file");
3871         }
3872         $ftype = git_get_type($hash);
3873         if ($ftype !~ "blob") {
3874                 die_error('400 Bad Request', "Object is not a blob");
3875         }
3876         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3877               $file_name, $hash_base)
3878                 or die_error(undef, "Open git-blame failed");
3879         git_header_html();
3880         my $formats_nav =
3881                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3882                         "blob") .
3883                 " | " .
3884                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3885                         "history") .
3886                 " | " .
3887                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3888                         "HEAD");
3889         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3890         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3891         git_print_page_path($file_name, $ftype, $hash_base);
3892         my @rev_color = (qw(light2 dark2));
3893         my $num_colors = scalar(@rev_color);
3894         my $current_color = 0;
3895         my $last_rev;
3896         print <<HTML;
3897 <div class="page_body">
3898 <table class="blame">
3899 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3900 HTML
3901         my %metainfo = ();
3902         while (1) {
3903                 $_ = <$fd>;
3904                 last unless defined $_;
3905                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3906                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3907                 if (!exists $metainfo{$full_rev}) {
3908                         $metainfo{$full_rev} = {};
3909                 }
3910                 my $meta = $metainfo{$full_rev};
3911                 while (<$fd>) {
3912                         last if (s/^\t//);
3913                         if (/^(\S+) (.*)$/) {
3914                                 $meta->{$1} = $2;
3915                         }
3916                 }
3917                 my $data = $_;
3918                 chomp $data;
3919                 my $rev = substr($full_rev, 0, 8);
3920                 my $author = $meta->{'author'};
3921                 my %date = parse_date($meta->{'author-time'},
3922                                       $meta->{'author-tz'});
3923                 my $date = $date{'iso-tz'};
3924                 if ($group_size) {
3925                         $current_color = ++$current_color % $num_colors;
3926                 }
3927                 print "<tr class=\"$rev_color[$current_color]\">\n";
3928                 if ($group_size) {
3929                         print "<td class=\"sha1\"";
3930                         print " title=\"". esc_html($author) . ", $date\"";
3931                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3932                         print ">";
3933                         print $cgi->a({-href => href(action=>"commit",
3934                                                      hash=>$full_rev,
3935                                                      file_name=>$file_name)},
3936                                       esc_html($rev));
3937                         print "</td>\n";
3938                 }
3939                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3940                         or die_error(undef, "Open git-rev-parse failed");
3941                 my $parent_commit = <$dd>;
3942                 close $dd;
3943                 chomp($parent_commit);
3944                 my $blamed = href(action => 'blame',
3945                                   file_name => $meta->{'filename'},
3946                                   hash_base => $parent_commit);
3947                 print "<td class=\"linenr\">";
3948                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3949                                 -id => "l$lineno",
3950                                 -class => "linenr" },
3951                               esc_html($lineno));
3952                 print "</td>";
3953                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3954                 print "</tr>\n";
3955         }
3956         print "</table>\n";
3957         print "</div>";
3958         close $fd
3959                 or print "Reading blob failed\n";
3960         git_footer_html();
3961 }
3962
3963 sub git_blame {
3964         my $fd;
3965
3966         my ($have_blame) = gitweb_check_feature('blame');
3967         if (!$have_blame) {
3968                 die_error('403 Permission denied', "Permission denied");
3969         }
3970         die_error('404 Not Found', "File name not defined") if (!$file_name);
3971         $hash_base ||= git_get_head_hash($project);
3972         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3973         my %co = parse_commit($hash_base)
3974                 or die_error(undef, "Reading commit failed");
3975         if (!defined $hash) {
3976                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3977                         or die_error(undef, "Error lookup file");
3978         }
3979         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
3980                 or die_error(undef, "Open git-annotate failed");
3981         git_header_html();
3982         my $formats_nav =
3983                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3984                         "blob") .
3985                 " | " .
3986                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3987                         "history") .
3988                 " | " .
3989                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3990                         "HEAD");
3991         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3992         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3993         git_print_page_path($file_name, 'blob', $hash_base);
3994         print "<div class=\"page_body\">\n";
3995         print <<HTML;
3996 <table class="blame">
3997   <tr>
3998     <th>Commit</th>
3999     <th>Age</th>
4000     <th>Author</th>
4001     <th>Line</th>
4002     <th>Data</th>
4003   </tr>
4004 HTML
4005         my @line_class = (qw(light dark));
4006         my $line_class_len = scalar (@line_class);
4007         my $line_class_num = $#line_class;
4008         while (my $line = <$fd>) {
4009                 my $long_rev;
4010                 my $short_rev;
4011                 my $author;
4012                 my $time;
4013                 my $lineno;
4014                 my $data;
4015                 my $age;
4016                 my $age_str;
4017                 my $age_class;
4018
4019                 chomp $line;
4020                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4021
4022                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4023                         $long_rev = $1;
4024                         $author   = $2;
4025                         $time     = $3;
4026                         $lineno   = $4;
4027                         $data     = $5;
4028                 } else {
4029                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4030                         next;
4031                 }
4032                 $short_rev  = substr ($long_rev, 0, 8);
4033                 $age        = time () - $time;
4034                 $age_str    = age_string ($age);
4035                 $age_str    =~ s/ /&nbsp;/g;
4036                 $age_class  = age_class($age);
4037                 $author     = esc_html ($author);
4038                 $author     =~ s/ /&nbsp;/g;
4039
4040                 $data = untabify($data);
4041                 $data = esc_html ($data);
4042
4043                 print <<HTML;
4044   <tr class="$line_class[$line_class_num]">
4045     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4046     <td class="$age_class">$age_str</td>
4047     <td>$author</td>
4048     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4049     <td class="pre">$data</td>
4050   </tr>
4051 HTML
4052         } # while (my $line = <$fd>)
4053         print "</table>\n\n";
4054         close $fd
4055                 or print "Reading blob failed.\n";
4056         print "</div>";
4057         git_footer_html();
4058 }
4059
4060 sub git_tags {
4061         my $head = git_get_head_hash($project);
4062         git_header_html();
4063         git_print_page_nav('','', $head,undef,$head);
4064         git_print_header_div('summary', $project);
4065
4066         my @tagslist = git_get_tags_list();
4067         if (@tagslist) {
4068                 git_tags_body(\@tagslist);
4069         }
4070         git_footer_html();
4071 }
4072
4073 sub git_heads {
4074         my $head = git_get_head_hash($project);
4075         git_header_html();
4076         git_print_page_nav('','', $head,undef,$head);
4077         git_print_header_div('summary', $project);
4078
4079         my @headslist = git_get_heads_list();
4080         if (@headslist) {
4081                 git_heads_body(\@headslist, $head);
4082         }
4083         git_footer_html();
4084 }
4085
4086 sub git_blob_plain {
4087         my $expires;
4088
4089         if (!defined $hash) {
4090                 if (defined $file_name) {
4091                         my $base = $hash_base || git_get_head_hash($project);
4092                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4093                                 or die_error(undef, "Error lookup file");
4094                 } else {
4095                         die_error(undef, "No file name defined");
4096                 }
4097         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4098                 # blobs defined by non-textual hash id's can be cached
4099                 $expires = "+1d";
4100         }
4101
4102         my $type = shift;
4103         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4104                 or die_error(undef, "Couldn't cat $file_name, $hash");
4105
4106         $type ||= blob_mimetype($fd, $file_name);
4107
4108         # save as filename, even when no $file_name is given
4109         my $save_as = "$hash";
4110         if (defined $file_name) {
4111                 $save_as = $file_name;
4112         } elsif ($type =~ m/^text\//) {
4113                 $save_as .= '.txt';
4114         }
4115
4116         print $cgi->header(
4117                 -type => "$type",
4118                 -expires=>$expires,
4119                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4120         undef $/;
4121         binmode STDOUT, ':raw';
4122         print <$fd>;
4123         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4124         $/ = "\n";
4125         close $fd;
4126 }
4127
4128 sub git_blob {
4129         my $expires;
4130
4131         if (!defined $hash) {
4132                 if (defined $file_name) {
4133                         my $base = $hash_base || git_get_head_hash($project);
4134                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4135                                 or die_error(undef, "Error lookup file");
4136                 } else {
4137                         die_error(undef, "No file name defined");
4138                 }
4139         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4140                 # blobs defined by non-textual hash id's can be cached
4141                 $expires = "+1d";
4142         }
4143
4144         my ($have_blame) = gitweb_check_feature('blame');
4145         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4146                 or die_error(undef, "Couldn't cat $file_name, $hash");
4147         my $mimetype = blob_mimetype($fd, $file_name);
4148         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4149                 close $fd;
4150                 return git_blob_plain($mimetype);
4151         }
4152         # we can have blame only for text/* mimetype
4153         $have_blame &&= ($mimetype =~ m!^text/!);
4154
4155         git_header_html(undef, $expires);
4156         my $formats_nav = '';
4157         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4158                 if (defined $file_name) {
4159                         if ($have_blame) {
4160                                 $formats_nav .=
4161                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4162                                                                hash=>$hash, file_name=>$file_name)},
4163                                                 "blame") .
4164                                         " | ";
4165                         }
4166                         $formats_nav .=
4167                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4168                                                        hash=>$hash, file_name=>$file_name)},
4169                                         "history") .
4170                                 " | " .
4171                                 $cgi->a({-href => href(action=>"blob_plain",
4172                                                        hash=>$hash, file_name=>$file_name)},
4173                                         "raw") .
4174                                 " | " .
4175                                 $cgi->a({-href => href(action=>"blob",
4176                                                        hash_base=>"HEAD", file_name=>$file_name)},
4177                                         "HEAD");
4178                 } else {
4179                         $formats_nav .=
4180                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4181                 }
4182                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4183                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4184         } else {
4185                 print "<div class=\"page_nav\">\n" .
4186                       "<br/><br/></div>\n" .
4187                       "<div class=\"title\">$hash</div>\n";
4188         }
4189         git_print_page_path($file_name, "blob", $hash_base);
4190         print "<div class=\"page_body\">\n";
4191         if ($mimetype =~ m!^text/!) {
4192                 my $nr;
4193                 while (my $line = <$fd>) {
4194                         chomp $line;
4195                         $nr++;
4196                         $line = untabify($line);
4197                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4198                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4199                 }
4200         } elsif ($mimetype =~ m!^image/!) {
4201                 print qq!<img type="$mimetype"!;
4202                 if ($file_name) {
4203                         print qq! alt="$file_name" title="$file_name"!;
4204                 }
4205                 print qq! src="! .
4206                       href(action=>"blob_plain", hash=>$hash,
4207                            hash_base=>$hash_base, file_name=>$file_name) .
4208                       qq!" />\n!;
4209         }
4210         close $fd
4211                 or print "Reading blob failed.\n";
4212         print "</div>";
4213         git_footer_html();
4214 }
4215
4216 sub git_tree {
4217         if (!defined $hash_base) {
4218                 $hash_base = "HEAD";
4219         }
4220         if (!defined $hash) {
4221                 if (defined $file_name) {
4222                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4223                 } else {
4224                         $hash = $hash_base;
4225                 }
4226         }
4227         $/ = "\0";
4228         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4229                 or die_error(undef, "Open git-ls-tree failed");
4230         my @entries = map { chomp; $_ } <$fd>;
4231         close $fd or die_error(undef, "Reading tree failed");
4232         $/ = "\n";
4233
4234         my $refs = git_get_references();
4235         my $ref = format_ref_marker($refs, $hash_base);
4236         git_header_html();
4237         my $basedir = '';
4238         my ($have_blame) = gitweb_check_feature('blame');
4239         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4240                 my @views_nav = ();
4241                 if (defined $file_name) {
4242                         push @views_nav,
4243                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4244                                                        hash=>$hash, file_name=>$file_name)},
4245                                         "history"),
4246                                 $cgi->a({-href => href(action=>"tree",
4247                                                        hash_base=>"HEAD", file_name=>$file_name)},
4248                                         "HEAD"),
4249                 }
4250                 my $snapshot_links = format_snapshot_links($hash);
4251                 if (defined $snapshot_links) {
4252                         # FIXME: Should be available when we have no hash base as well.
4253                         push @views_nav, $snapshot_links;
4254                 }
4255                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4256                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4257         } else {
4258                 undef $hash_base;
4259                 print "<div class=\"page_nav\">\n";
4260                 print "<br/><br/></div>\n";
4261                 print "<div class=\"title\">$hash</div>\n";
4262         }
4263         if (defined $file_name) {
4264                 $basedir = $file_name;
4265                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4266                         $basedir .= '/';
4267                 }
4268         }
4269         git_print_page_path($file_name, 'tree', $hash_base);
4270         print "<div class=\"page_body\">\n";
4271         print "<table cellspacing=\"0\">\n";
4272         my $alternate = 1;
4273         # '..' (top directory) link if possible
4274         if (defined $hash_base &&
4275             defined $file_name && $file_name =~ m![^/]+$!) {
4276                 if ($alternate) {
4277                         print "<tr class=\"dark\">\n";
4278                 } else {
4279                         print "<tr class=\"light\">\n";
4280                 }
4281                 $alternate ^= 1;
4282
4283                 my $up = $file_name;
4284                 $up =~ s!/?[^/]+$!!;
4285                 undef $up unless $up;
4286                 # based on git_print_tree_entry
4287                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4288                 print '<td class="list">';
4289                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4290                                              file_name=>$up)},
4291                               "..");
4292                 print "</td>\n";
4293                 print "<td class=\"link\"></td>\n";
4294
4295                 print "</tr>\n";
4296         }
4297         foreach my $line (@entries) {
4298                 my %t = parse_ls_tree_line($line, -z => 1);
4299
4300                 if ($alternate) {
4301                         print "<tr class=\"dark\">\n";
4302                 } else {
4303                         print "<tr class=\"light\">\n";
4304                 }
4305                 $alternate ^= 1;
4306
4307                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4308
4309                 print "</tr>\n";
4310         }
4311         print "</table>\n" .
4312               "</div>";
4313         git_footer_html();
4314 }
4315
4316 sub git_snapshot {
4317         my @supported_fmts = gitweb_check_feature('snapshot');
4318         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4319
4320         my $format = $cgi->param('sf');
4321         unless ($format =~ m/[a-z0-9]+/
4322                 && exists($known_snapshot_formats{$format})
4323                 && grep($_ eq $format, @supported_fmts)) {
4324                 die_error(undef, "Unsupported snapshot format");
4325         }
4326
4327         if (!defined $hash) {
4328                 $hash = git_get_head_hash($project);
4329         }
4330
4331         my $git_command = git_cmd_str();
4332         my $name = $project;
4333         $name =~ s,([^/])/*\.git$,$1,;
4334         $name = basename($name);
4335         my $filename = to_utf8($name);
4336         $name =~ s/\047/\047\\\047\047/g;
4337         my $cmd;
4338         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4339         $cmd = "$git_command archive " .
4340                 "--format=$known_snapshot_formats{$format}{'format'}" .
4341                 "--prefix=\'$name\'/ $hash";
4342         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4343                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4344         }
4345
4346         print $cgi->header(
4347                 -type => $known_snapshot_formats{$format}{'type'},
4348                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4349                 -status => '200 OK');
4350
4351         open my $fd, "-|", $cmd
4352                 or die_error(undef, "Execute git-archive failed");
4353         binmode STDOUT, ':raw';
4354         print <$fd>;
4355         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4356         close $fd;
4357 }
4358
4359 sub git_log {
4360         my $head = git_get_head_hash($project);
4361         if (!defined $hash) {
4362                 $hash = $head;
4363         }
4364         if (!defined $page) {
4365                 $page = 0;
4366         }
4367         my $refs = git_get_references();
4368
4369         my @commitlist = parse_commits($hash, 101, (100 * $page));
4370
4371         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4372
4373         git_header_html();
4374         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4375
4376         if (!@commitlist) {
4377                 my %co = parse_commit($hash);
4378
4379                 git_print_header_div('summary', $project);
4380                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4381         }
4382         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4383         for (my $i = 0; $i <= $to; $i++) {
4384                 my %co = %{$commitlist[$i]};
4385                 next if !%co;
4386                 my $commit = $co{'id'};
4387                 my $ref = format_ref_marker($refs, $commit);
4388                 my %ad = parse_date($co{'author_epoch'});
4389                 git_print_header_div('commit',
4390                                "<span class=\"age\">$co{'age_string'}</span>" .
4391                                esc_html($co{'title'}) . $ref,
4392                                $commit);
4393                 print "<div class=\"title_text\">\n" .
4394                       "<div class=\"log_link\">\n" .
4395                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4396                       " | " .
4397                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4398                       " | " .
4399                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4400                       "<br/>\n" .
4401                       "</div>\n" .
4402                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4403                       "</div>\n";
4404
4405                 print "<div class=\"log_body\">\n";
4406                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4407                 print "</div>\n";
4408         }
4409         if ($#commitlist >= 100) {
4410                 print "<div class=\"page_nav\">\n";
4411                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4412                                -accesskey => "n", -title => "Alt-n"}, "next");
4413                 print "</div>\n";
4414         }
4415         git_footer_html();
4416 }
4417
4418 sub git_commit {
4419         $hash ||= $hash_base || "HEAD";
4420         my %co = parse_commit($hash);
4421         if (!%co) {
4422                 die_error(undef, "Unknown commit object");
4423         }
4424         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4425         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4426
4427         my $parent  = $co{'parent'};
4428         my $parents = $co{'parents'}; # listref
4429
4430         # we need to prepare $formats_nav before any parameter munging
4431         my $formats_nav;
4432         if (!defined $parent) {
4433                 # --root commitdiff
4434                 $formats_nav .= '(initial)';
4435         } elsif (@$parents == 1) {
4436                 # single parent commit
4437                 $formats_nav .=
4438                         '(parent: ' .
4439                         $cgi->a({-href => href(action=>"commit",
4440                                                hash=>$parent)},
4441                                 esc_html(substr($parent, 0, 7))) .
4442                         ')';
4443         } else {
4444                 # merge commit
4445                 $formats_nav .=
4446                         '(merge: ' .
4447                         join(' ', map {
4448                                 $cgi->a({-href => href(action=>"commit",
4449                                                        hash=>$_)},
4450                                         esc_html(substr($_, 0, 7)));
4451                         } @$parents ) .
4452                         ')';
4453         }
4454
4455         if (!defined $parent) {
4456                 $parent = "--root";
4457         }
4458         my @difftree;
4459         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4460                 @diff_opts,
4461                 (@$parents <= 1 ? $parent : '-c'),
4462                 $hash, "--"
4463                 or die_error(undef, "Open git-diff-tree failed");
4464         @difftree = map { chomp; $_ } <$fd>;
4465         close $fd or die_error(undef, "Reading git-diff-tree failed");
4466
4467         # non-textual hash id's can be cached
4468         my $expires;
4469         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4470                 $expires = "+1d";
4471         }
4472         my $refs = git_get_references();
4473         my $ref = format_ref_marker($refs, $co{'id'});
4474
4475         git_header_html(undef, $expires);
4476         git_print_page_nav('commit', '',
4477                            $hash, $co{'tree'}, $hash,
4478                            $formats_nav);
4479
4480         if (defined $co{'parent'}) {
4481                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4482         } else {
4483                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4484         }
4485         print "<div class=\"title_text\">\n" .
4486               "<table cellspacing=\"0\">\n";
4487         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4488               "<tr>" .
4489               "<td></td><td> $ad{'rfc2822'}";
4490         if ($ad{'hour_local'} < 6) {
4491                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4492                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4493         } else {
4494                 printf(" (%02d:%02d %s)",
4495                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4496         }
4497         print "</td>" .
4498               "</tr>\n";
4499         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4500         print "<tr><td></td><td> $cd{'rfc2822'}" .
4501               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4502               "</td></tr>\n";
4503         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4504         print "<tr>" .
4505               "<td>tree</td>" .
4506               "<td class=\"sha1\">" .
4507               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4508                        class => "list"}, $co{'tree'}) .
4509               "</td>" .
4510               "<td class=\"link\">" .
4511               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4512                       "tree");
4513         my $snapshot_links = format_snapshot_links($hash);
4514         if (defined $snapshot_links) {
4515                 print " | " . $snapshot_links;
4516         }
4517         print "</td>" .
4518               "</tr>\n";
4519
4520         foreach my $par (@$parents) {
4521                 print "<tr>" .
4522                       "<td>parent</td>" .
4523                       "<td class=\"sha1\">" .
4524                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4525                                class => "list"}, $par) .
4526                       "</td>" .
4527                       "<td class=\"link\">" .
4528                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4529                       " | " .
4530                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4531                       "</td>" .
4532                       "</tr>\n";
4533         }
4534         print "</table>".
4535               "</div>\n";
4536
4537         print "<div class=\"page_body\">\n";
4538         git_print_log($co{'comment'});
4539         print "</div>\n";
4540
4541         git_difftree_body(\@difftree, $hash, @$parents);
4542
4543         git_footer_html();
4544 }
4545
4546 sub git_object {
4547         # object is defined by:
4548         # - hash or hash_base alone
4549         # - hash_base and file_name
4550         my $type;
4551
4552         # - hash or hash_base alone
4553         if ($hash || ($hash_base && !defined $file_name)) {
4554                 my $object_id = $hash || $hash_base;
4555
4556                 my $git_command = git_cmd_str();
4557                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4558                         or die_error('404 Not Found', "Object does not exist");
4559                 $type = <$fd>;
4560                 chomp $type;
4561                 close $fd
4562                         or die_error('404 Not Found', "Object does not exist");
4563
4564         # - hash_base and file_name
4565         } elsif ($hash_base && defined $file_name) {
4566                 $file_name =~ s,/+$,,;
4567
4568                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4569                         or die_error('404 Not Found', "Base object does not exist");
4570
4571                 # here errors should not hapen
4572                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4573                         or die_error(undef, "Open git-ls-tree failed");
4574                 my $line = <$fd>;
4575                 close $fd;
4576
4577                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4578                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4579                         die_error('404 Not Found', "File or directory for given base does not exist");
4580                 }
4581                 $type = $2;
4582                 $hash = $3;
4583         } else {
4584                 die_error('404 Not Found', "Not enough information to find object");
4585         }
4586
4587         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4588                                           hash=>$hash, hash_base=>$hash_base,
4589                                           file_name=>$file_name),
4590                              -status => '302 Found');
4591 }
4592
4593 sub git_blobdiff {
4594         my $format = shift || 'html';
4595
4596         my $fd;
4597         my @difftree;
4598         my %diffinfo;
4599         my $expires;
4600
4601         # preparing $fd and %diffinfo for git_patchset_body
4602         # new style URI
4603         if (defined $hash_base && defined $hash_parent_base) {
4604                 if (defined $file_name) {
4605                         # read raw output
4606                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4607                                 $hash_parent_base, $hash_base,
4608                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4609                                 or die_error(undef, "Open git-diff-tree failed");
4610                         @difftree = map { chomp; $_ } <$fd>;
4611                         close $fd
4612                                 or die_error(undef, "Reading git-diff-tree failed");
4613                         @difftree
4614                                 or die_error('404 Not Found', "Blob diff not found");
4615
4616                 } elsif (defined $hash &&
4617                          $hash =~ /[0-9a-fA-F]{40}/) {
4618                         # try to find filename from $hash
4619
4620                         # read filtered raw output
4621                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4622                                 $hash_parent_base, $hash_base, "--"
4623                                 or die_error(undef, "Open git-diff-tree failed");
4624                         @difftree =
4625                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4626                                 # $hash == to_id
4627                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4628                                 map { chomp; $_ } <$fd>;
4629                         close $fd
4630                                 or die_error(undef, "Reading git-diff-tree failed");
4631                         @difftree
4632                                 or die_error('404 Not Found', "Blob diff not found");
4633
4634                 } else {
4635                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4636                 }
4637
4638                 if (@difftree > 1) {
4639                         die_error('404 Not Found', "Ambiguous blob diff specification");
4640                 }
4641
4642                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4643                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4644                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4645
4646                 $hash_parent ||= $diffinfo{'from_id'};
4647                 $hash        ||= $diffinfo{'to_id'};
4648
4649                 # non-textual hash id's can be cached
4650                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4651                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4652                         $expires = '+1d';
4653                 }
4654
4655                 # open patch output
4656                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4657                         '-p', ($format eq 'html' ? "--full-index" : ()),
4658                         $hash_parent_base, $hash_base,
4659                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4660                         or die_error(undef, "Open git-diff-tree failed");
4661         }
4662
4663         # old/legacy style URI
4664         if (!%diffinfo && # if new style URI failed
4665             defined $hash && defined $hash_parent) {
4666                 # fake git-diff-tree raw output
4667                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4668                 $diffinfo{'from_id'} = $hash_parent;
4669                 $diffinfo{'to_id'}   = $hash;
4670                 if (defined $file_name) {
4671                         if (defined $file_parent) {
4672                                 $diffinfo{'status'} = '2';
4673                                 $diffinfo{'from_file'} = $file_parent;
4674                                 $diffinfo{'to_file'}   = $file_name;
4675                         } else { # assume not renamed
4676                                 $diffinfo{'status'} = '1';
4677                                 $diffinfo{'from_file'} = $file_name;
4678                                 $diffinfo{'to_file'}   = $file_name;
4679                         }
4680                 } else { # no filename given
4681                         $diffinfo{'status'} = '2';
4682                         $diffinfo{'from_file'} = $hash_parent;
4683                         $diffinfo{'to_file'}   = $hash;
4684                 }
4685
4686                 # non-textual hash id's can be cached
4687                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4688                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4689                         $expires = '+1d';
4690                 }
4691
4692                 # open patch output
4693                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4694                         '-p', ($format eq 'html' ? "--full-index" : ()),
4695                         $hash_parent, $hash, "--"
4696                         or die_error(undef, "Open git-diff failed");
4697         } else  {
4698                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4699                         unless %diffinfo;
4700         }
4701
4702         # header
4703         if ($format eq 'html') {
4704                 my $formats_nav =
4705                         $cgi->a({-href => href(action=>"blobdiff_plain",
4706                                                hash=>$hash, hash_parent=>$hash_parent,
4707                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4708                                                file_name=>$file_name, file_parent=>$file_parent)},
4709                                 "raw");
4710                 git_header_html(undef, $expires);
4711                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4712                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4713                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4714                 } else {
4715                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4716                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4717                 }
4718                 if (defined $file_name) {
4719                         git_print_page_path($file_name, "blob", $hash_base);
4720                 } else {
4721                         print "<div class=\"page_path\"></div>\n";
4722                 }
4723
4724         } elsif ($format eq 'plain') {
4725                 print $cgi->header(
4726                         -type => 'text/plain',
4727                         -charset => 'utf-8',
4728                         -expires => $expires,
4729                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4730
4731                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4732
4733         } else {
4734                 die_error(undef, "Unknown blobdiff format");
4735         }
4736
4737         # patch
4738         if ($format eq 'html') {
4739                 print "<div class=\"page_body\">\n";
4740
4741                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4742                 close $fd;
4743
4744                 print "</div>\n"; # class="page_body"
4745                 git_footer_html();
4746
4747         } else {
4748                 while (my $line = <$fd>) {
4749                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4750                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4751
4752                         print $line;
4753
4754                         last if $line =~ m!^\+\+\+!;
4755                 }
4756                 local $/ = undef;
4757                 print <$fd>;
4758                 close $fd;
4759         }
4760 }
4761
4762 sub git_blobdiff_plain {
4763         git_blobdiff('plain');
4764 }
4765
4766 sub git_commitdiff {
4767         my $format = shift || 'html';
4768         $hash ||= $hash_base || "HEAD";
4769         my %co = parse_commit($hash);
4770         if (!%co) {
4771                 die_error(undef, "Unknown commit object");
4772         }
4773
4774         # choose format for commitdiff for merge
4775         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4776                 $hash_parent = '--cc';
4777         }
4778         # we need to prepare $formats_nav before almost any parameter munging
4779         my $formats_nav;
4780         if ($format eq 'html') {
4781                 $formats_nav =
4782                         $cgi->a({-href => href(action=>"commitdiff_plain",
4783                                                hash=>$hash, hash_parent=>$hash_parent)},
4784                                 "raw");
4785
4786                 if (defined $hash_parent &&
4787                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4788                         # commitdiff with two commits given
4789                         my $hash_parent_short = $hash_parent;
4790                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4791                                 $hash_parent_short = substr($hash_parent, 0, 7);
4792                         }
4793                         $formats_nav .=
4794                                 ' (from';
4795                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4796                                 if ($co{'parents'}[$i] eq $hash_parent) {
4797                                         $formats_nav .= ' parent ' . ($i+1);
4798                                         last;
4799                                 }
4800                         }
4801                         $formats_nav .= ': ' .
4802                                 $cgi->a({-href => href(action=>"commitdiff",
4803                                                        hash=>$hash_parent)},
4804                                         esc_html($hash_parent_short)) .
4805                                 ')';
4806                 } elsif (!$co{'parent'}) {
4807                         # --root commitdiff
4808                         $formats_nav .= ' (initial)';
4809                 } elsif (scalar @{$co{'parents'}} == 1) {
4810                         # single parent commit
4811                         $formats_nav .=
4812                                 ' (parent: ' .
4813                                 $cgi->a({-href => href(action=>"commitdiff",
4814                                                        hash=>$co{'parent'})},
4815                                         esc_html(substr($co{'parent'}, 0, 7))) .
4816                                 ')';
4817                 } else {
4818                         # merge commit
4819                         if ($hash_parent eq '--cc') {
4820                                 $formats_nav .= ' | ' .
4821                                         $cgi->a({-href => href(action=>"commitdiff",
4822                                                                hash=>$hash, hash_parent=>'-c')},
4823                                                 'combined');
4824                         } else { # $hash_parent eq '-c'
4825                                 $formats_nav .= ' | ' .
4826                                         $cgi->a({-href => href(action=>"commitdiff",
4827                                                                hash=>$hash, hash_parent=>'--cc')},
4828                                                 'compact');
4829                         }
4830                         $formats_nav .=
4831                                 ' (merge: ' .
4832                                 join(' ', map {
4833                                         $cgi->a({-href => href(action=>"commitdiff",
4834                                                                hash=>$_)},
4835                                                 esc_html(substr($_, 0, 7)));
4836                                 } @{$co{'parents'}} ) .
4837                                 ')';
4838                 }
4839         }
4840
4841         my $hash_parent_param = $hash_parent;
4842         if (!defined $hash_parent_param) {
4843                 # --cc for multiple parents, --root for parentless
4844                 $hash_parent_param =
4845                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4846         }
4847
4848         # read commitdiff
4849         my $fd;
4850         my @difftree;
4851         if ($format eq 'html') {
4852                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4853                         "--no-commit-id", "--patch-with-raw", "--full-index",
4854                         $hash_parent_param, $hash, "--"
4855                         or die_error(undef, "Open git-diff-tree failed");
4856
4857                 while (my $line = <$fd>) {
4858                         chomp $line;
4859                         # empty line ends raw part of diff-tree output
4860                         last unless $line;
4861                         push @difftree, scalar parse_difftree_raw_line($line);
4862                 }
4863
4864         } elsif ($format eq 'plain') {
4865                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4866                         '-p', $hash_parent_param, $hash, "--"
4867                         or die_error(undef, "Open git-diff-tree failed");
4868
4869         } else {
4870                 die_error(undef, "Unknown commitdiff format");
4871         }
4872
4873         # non-textual hash id's can be cached
4874         my $expires;
4875         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4876                 $expires = "+1d";
4877         }
4878
4879         # write commit message
4880         if ($format eq 'html') {
4881                 my $refs = git_get_references();
4882                 my $ref = format_ref_marker($refs, $co{'id'});
4883
4884                 git_header_html(undef, $expires);
4885                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4886                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4887                 git_print_authorship(\%co);
4888                 print "<div class=\"page_body\">\n";
4889                 if (@{$co{'comment'}} > 1) {
4890                         print "<div class=\"log\">\n";
4891                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4892                         print "</div>\n"; # class="log"
4893                 }
4894
4895         } elsif ($format eq 'plain') {
4896                 my $refs = git_get_references("tags");
4897                 my $tagname = git_get_rev_name_tags($hash);
4898                 my $filename = basename($project) . "-$hash.patch";
4899
4900                 print $cgi->header(
4901                         -type => 'text/plain',
4902                         -charset => 'utf-8',
4903                         -expires => $expires,
4904                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4905                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4906                 print <<TEXT;
4907 From: $co{'author'}
4908 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4909 Subject: $co{'title'}
4910 TEXT
4911                 print "X-Git-Tag: $tagname\n" if $tagname;
4912                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4913
4914                 foreach my $line (@{$co{'comment'}}) {
4915                         print "$line\n";
4916                 }
4917                 print "---\n\n";
4918         }
4919
4920         # write patch
4921         if ($format eq 'html') {
4922                 my $use_parents = !defined $hash_parent ||
4923                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4924                 git_difftree_body(\@difftree, $hash,
4925                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4926                 print "<br/>\n";
4927
4928                 git_patchset_body($fd, \@difftree, $hash,
4929                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4930                 close $fd;
4931                 print "</div>\n"; # class="page_body"
4932                 git_footer_html();
4933
4934         } elsif ($format eq 'plain') {
4935                 local $/ = undef;
4936                 print <$fd>;
4937                 close $fd
4938                         or print "Reading git-diff-tree failed\n";
4939         }
4940 }
4941
4942 sub git_commitdiff_plain {
4943         git_commitdiff('plain');
4944 }
4945
4946 sub git_history {
4947         if (!defined $hash_base) {
4948                 $hash_base = git_get_head_hash($project);
4949         }
4950         if (!defined $page) {
4951                 $page = 0;
4952         }
4953         my $ftype;
4954         my %co = parse_commit($hash_base);
4955         if (!%co) {
4956                 die_error(undef, "Unknown commit object");
4957         }
4958
4959         my $refs = git_get_references();
4960         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4961
4962         if (!defined $hash && defined $file_name) {
4963                 $hash = git_get_hash_by_path($hash_base, $file_name);
4964         }
4965         if (defined $hash) {
4966                 $ftype = git_get_type($hash);
4967         }
4968
4969         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
4970
4971         my $paging_nav = '';
4972         if ($page > 0) {
4973                 $paging_nav .=
4974                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4975                                                file_name=>$file_name)},
4976                                 "first");
4977                 $paging_nav .= " &sdot; " .
4978                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4979                                                file_name=>$file_name, page=>$page-1),
4980                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4981         } else {
4982                 $paging_nav .= "first";
4983                 $paging_nav .= " &sdot; prev";
4984         }
4985         if ($#commitlist >= 100) {
4986                 $paging_nav .= " &sdot; " .
4987                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4988                                                file_name=>$file_name, page=>$page+1),
4989                                  -accesskey => "n", -title => "Alt-n"}, "next");
4990         } else {
4991                 $paging_nav .= " &sdot; next";
4992         }
4993         my $next_link = '';
4994         if ($#commitlist >= 100) {
4995                 $next_link =
4996                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4997                                                file_name=>$file_name, page=>$page+1),
4998                                  -accesskey => "n", -title => "Alt-n"}, "next");
4999         }
5000
5001         git_header_html();
5002         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5003         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5004         git_print_page_path($file_name, $ftype, $hash_base);
5005
5006         git_history_body(\@commitlist, 0, 99,
5007                          $refs, $hash_base, $ftype, $next_link);
5008
5009         git_footer_html();
5010 }
5011
5012 sub git_search {
5013         my ($have_search) = gitweb_check_feature('search');
5014         if (!$have_search) {
5015                 die_error('403 Permission denied', "Permission denied");
5016         }
5017         if (!defined $searchtext) {
5018                 die_error(undef, "Text field empty");
5019         }
5020         if (!defined $hash) {
5021                 $hash = git_get_head_hash($project);
5022         }
5023         my %co = parse_commit($hash);
5024         if (!%co) {
5025                 die_error(undef, "Unknown commit object");
5026         }
5027         if (!defined $page) {
5028                 $page = 0;
5029         }
5030
5031         $searchtype ||= 'commit';
5032         if ($searchtype eq 'pickaxe') {
5033                 # pickaxe may take all resources of your box and run for several minutes
5034                 # with every query - so decide by yourself how public you make this feature
5035                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5036                 if (!$have_pickaxe) {
5037                         die_error('403 Permission denied', "Permission denied");
5038                 }
5039         }
5040         if ($searchtype eq 'grep') {
5041                 my ($have_grep) = gitweb_check_feature('grep');
5042                 if (!$have_grep) {
5043                         die_error('403 Permission denied', "Permission denied");
5044                 }
5045         }
5046
5047         git_header_html();
5048
5049         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5050                 my $greptype;
5051                 if ($searchtype eq 'commit') {
5052                         $greptype = "--grep=";
5053                 } elsif ($searchtype eq 'author') {
5054                         $greptype = "--author=";
5055                 } elsif ($searchtype eq 'committer') {
5056                         $greptype = "--committer=";
5057                 }
5058                 $greptype .= $search_regexp;
5059                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5060
5061                 my $paging_nav = '';
5062                 if ($page > 0) {
5063                         $paging_nav .=
5064                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5065                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5066                                         "first");
5067                         $paging_nav .= " &sdot; " .
5068                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5069                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5070                                                        page=>$page-1),
5071                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5072                 } else {
5073                         $paging_nav .= "first";
5074                         $paging_nav .= " &sdot; prev";
5075                 }
5076                 if ($#commitlist >= 100) {
5077                         $paging_nav .= " &sdot; " .
5078                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5079                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5080                                                        page=>$page+1),
5081                                          -accesskey => "n", -title => "Alt-n"}, "next");
5082                 } else {
5083                         $paging_nav .= " &sdot; next";
5084                 }
5085                 my $next_link = '';
5086                 if ($#commitlist >= 100) {
5087                         $next_link =
5088                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5089                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5090                                                        page=>$page+1),
5091                                          -accesskey => "n", -title => "Alt-n"}, "next");
5092                 }
5093
5094                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5095                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5096                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5097         }
5098
5099         if ($searchtype eq 'pickaxe') {
5100                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5101                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5102
5103                 print "<table cellspacing=\"0\">\n";
5104                 my $alternate = 1;
5105                 $/ = "\n";
5106                 my $git_command = git_cmd_str();
5107                 my $searchqtext = $searchtext;
5108                 $searchqtext =~ s/'/'\\''/;
5109                 open my $fd, "-|", "$git_command rev-list $hash | " .
5110                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5111                 undef %co;
5112                 my @files;
5113                 while (my $line = <$fd>) {
5114                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5115                                 my %set;
5116                                 $set{'file'} = $6;
5117                                 $set{'from_id'} = $3;
5118                                 $set{'to_id'} = $4;
5119                                 $set{'id'} = $set{'to_id'};
5120                                 if ($set{'id'} =~ m/0{40}/) {
5121                                         $set{'id'} = $set{'from_id'};
5122                                 }
5123                                 if ($set{'id'} =~ m/0{40}/) {
5124                                         next;
5125                                 }
5126                                 push @files, \%set;
5127                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5128                                 if (%co) {
5129                                         if ($alternate) {
5130                                                 print "<tr class=\"dark\">\n";
5131                                         } else {
5132                                                 print "<tr class=\"light\">\n";
5133                                         }
5134                                         $alternate ^= 1;
5135                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5136                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5137                                               "<td>" .
5138                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5139                                                       -class => "list subject"},
5140                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5141                                         while (my $setref = shift @files) {
5142                                                 my %set = %$setref;
5143                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5144                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5145                                                               -class => "list"},
5146                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5147                                                       "<br/>\n";
5148                                         }
5149                                         print "</td>\n" .
5150                                               "<td class=\"link\">" .
5151                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5152                                               " | " .
5153                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5154                                         print "</td>\n" .
5155                                               "</tr>\n";
5156                                 }
5157                                 %co = parse_commit($1);
5158                         }
5159                 }
5160                 close $fd;
5161
5162                 print "</table>\n";
5163         }
5164
5165         if ($searchtype eq 'grep') {
5166                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5167                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5168
5169                 print "<table cellspacing=\"0\">\n";
5170                 my $alternate = 1;
5171                 my $matches = 0;
5172                 $/ = "\n";
5173                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5174                 my $lastfile = '';
5175                 while (my $line = <$fd>) {
5176                         chomp $line;
5177                         my ($file, $lno, $ltext, $binary);
5178                         last if ($matches++ > 1000);
5179                         if ($line =~ /^Binary file (.+) matches$/) {
5180                                 $file = $1;
5181                                 $binary = 1;
5182                         } else {
5183                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5184                         }
5185                         if ($file ne $lastfile) {
5186                                 $lastfile and print "</td></tr>\n";
5187                                 if ($alternate++) {
5188                                         print "<tr class=\"dark\">\n";
5189                                 } else {
5190                                         print "<tr class=\"light\">\n";
5191                                 }
5192                                 print "<td class=\"list\">".
5193                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5194                                                                file_name=>"$file"),
5195                                                 -class => "list"}, esc_path($file));
5196                                 print "</td><td>\n";
5197                                 $lastfile = $file;
5198                         }
5199                         if ($binary) {
5200                                 print "<div class=\"binary\">Binary file</div>\n";
5201                         } else {
5202                                 $ltext = untabify($ltext);
5203                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5204                                         $ltext = esc_html($1, -nbsp=>1);
5205                                         $ltext .= '<span class="match">';
5206                                         $ltext .= esc_html($2, -nbsp=>1);
5207                                         $ltext .= '</span>';
5208                                         $ltext .= esc_html($3, -nbsp=>1);
5209                                 } else {
5210                                         $ltext = esc_html($ltext, -nbsp=>1);
5211                                 }
5212                                 print "<div class=\"pre\">" .
5213                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5214                                                                file_name=>"$file").'#l'.$lno,
5215                                                 -class => "linenr"}, sprintf('%4i', $lno))
5216                                         . ' ' .  $ltext . "</div>\n";
5217                         }
5218                 }
5219                 if ($lastfile) {
5220                         print "</td></tr>\n";
5221                         if ($matches > 1000) {
5222                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5223                         }
5224                 } else {
5225                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5226                 }
5227                 close $fd;
5228
5229                 print "</table>\n";
5230         }
5231         git_footer_html();
5232 }
5233
5234 sub git_search_help {
5235         git_header_html();
5236         git_print_page_nav('','', $hash,$hash,$hash);
5237         print <<EOT;
5238 <dl>
5239 <dt><b>commit</b></dt>
5240 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5241 EOT
5242         my ($have_grep) = gitweb_check_feature('grep');
5243         if ($have_grep) {
5244                 print <<EOT;
5245 <dt><b>grep</b></dt>
5246 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5247     a different one) are searched for the given
5248 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5249 (POSIX extended) and the matches are listed. On large
5250 trees, this search can take a while and put some strain on the server, so please use it with
5251 some consideration.</dd>
5252 EOT
5253         }
5254         print <<EOT;
5255 <dt><b>author</b></dt>
5256 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5257 <dt><b>committer</b></dt>
5258 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5259 EOT
5260         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5261         if ($have_pickaxe) {
5262                 print <<EOT;
5263 <dt><b>pickaxe</b></dt>
5264 <dd>All commits that caused the string to appear or disappear from any file (changes that
5265 added, removed or "modified" the string) will be listed. This search can take a while and
5266 takes a lot of strain on the server, so please use it wisely.</dd>
5267 EOT
5268         }
5269         print "</dl>\n";
5270         git_footer_html();
5271 }
5272
5273 sub git_shortlog {
5274         my $head = git_get_head_hash($project);
5275         if (!defined $hash) {
5276                 $hash = $head;
5277         }
5278         if (!defined $page) {
5279                 $page = 0;
5280         }
5281         my $refs = git_get_references();
5282
5283         my @commitlist = parse_commits($hash, 101, (100 * $page));
5284
5285         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5286         my $next_link = '';
5287         if ($#commitlist >= 100) {
5288                 $next_link =
5289                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5290                                  -accesskey => "n", -title => "Alt-n"}, "next");
5291         }
5292
5293         git_header_html();
5294         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5295         git_print_header_div('summary', $project);
5296
5297         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5298
5299         git_footer_html();
5300 }
5301
5302 ## ......................................................................
5303 ## feeds (RSS, Atom; OPML)
5304
5305 sub git_feed {
5306         my $format = shift || 'atom';
5307         my ($have_blame) = gitweb_check_feature('blame');
5308
5309         # Atom: http://www.atomenabled.org/developers/syndication/
5310         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5311         if ($format ne 'rss' && $format ne 'atom') {
5312                 die_error(undef, "Unknown web feed format");
5313         }
5314
5315         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5316         my $head = $hash || 'HEAD';
5317         my @commitlist = parse_commits($head, 150);
5318
5319         my %latest_commit;
5320         my %latest_date;
5321         my $content_type = "application/$format+xml";
5322         if (defined $cgi->http('HTTP_ACCEPT') &&
5323                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5324                 # browser (feed reader) prefers text/xml
5325                 $content_type = 'text/xml';
5326         }
5327         if (defined($commitlist[0])) {
5328                 %latest_commit = %{$commitlist[0]};
5329                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5330                 print $cgi->header(
5331                         -type => $content_type,
5332                         -charset => 'utf-8',
5333                         -last_modified => $latest_date{'rfc2822'});
5334         } else {
5335                 print $cgi->header(
5336                         -type => $content_type,
5337                         -charset => 'utf-8');
5338         }
5339
5340         # Optimization: skip generating the body if client asks only
5341         # for Last-Modified date.
5342         return if ($cgi->request_method() eq 'HEAD');
5343
5344         # header variables
5345         my $title = "$site_name - $project/$action";
5346         my $feed_type = 'log';
5347         if (defined $hash) {
5348                 $title .= " - '$hash'";
5349                 $feed_type = 'branch log';
5350                 if (defined $file_name) {
5351                         $title .= " :: $file_name";
5352                         $feed_type = 'history';
5353                 }
5354         } elsif (defined $file_name) {
5355                 $title .= " - $file_name";
5356                 $feed_type = 'history';
5357         }
5358         $title .= " $feed_type";
5359         my $descr = git_get_project_description($project);
5360         if (defined $descr) {
5361                 $descr = esc_html($descr);
5362         } else {
5363                 $descr = "$project " .
5364                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5365                          " feed";
5366         }
5367         my $owner = git_get_project_owner($project);
5368         $owner = esc_html($owner);
5369
5370         #header
5371         my $alt_url;
5372         if (defined $file_name) {
5373                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5374         } elsif (defined $hash) {
5375                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5376         } else {
5377                 $alt_url = href(-full=>1, action=>"summary");
5378         }
5379         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5380         if ($format eq 'rss') {
5381                 print <<XML;
5382 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5383 <channel>
5384 XML
5385                 print "<title>$title</title>\n" .
5386                       "<link>$alt_url</link>\n" .
5387                       "<description>$descr</description>\n" .
5388                       "<language>en</language>\n";
5389         } elsif ($format eq 'atom') {
5390                 print <<XML;
5391 <feed xmlns="http://www.w3.org/2005/Atom">
5392 XML
5393                 print "<title>$title</title>\n" .
5394                       "<subtitle>$descr</subtitle>\n" .
5395                       '<link rel="alternate" type="text/html" href="' .
5396                       $alt_url . '" />' . "\n" .
5397                       '<link rel="self" type="' . $content_type . '" href="' .
5398                       $cgi->self_url() . '" />' . "\n" .
5399                       "<id>" . href(-full=>1) . "</id>\n" .
5400                       # use project owner for feed author
5401                       "<author><name>$owner</name></author>\n";
5402                 if (defined $favicon) {
5403                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5404                 }
5405                 if (defined $logo_url) {
5406                         # not twice as wide as tall: 72 x 27 pixels
5407                         print "<logo>" . esc_url($logo) . "</logo>\n";
5408                 }
5409                 if (! %latest_date) {
5410                         # dummy date to keep the feed valid until commits trickle in:
5411                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5412                 } else {
5413                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5414                 }
5415         }
5416
5417         # contents
5418         for (my $i = 0; $i <= $#commitlist; $i++) {
5419                 my %co = %{$commitlist[$i]};
5420                 my $commit = $co{'id'};
5421                 # we read 150, we always show 30 and the ones more recent than 48 hours
5422                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5423                         last;
5424                 }
5425                 my %cd = parse_date($co{'author_epoch'});
5426
5427                 # get list of changed files
5428                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5429                         $co{'parent'} || "--root",
5430                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5431                         or next;
5432                 my @difftree = map { chomp; $_ } <$fd>;
5433                 close $fd
5434                         or next;
5435
5436                 # print element (entry, item)
5437                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5438                 if ($format eq 'rss') {
5439                         print "<item>\n" .
5440                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5441                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5442                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5443                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5444                               "<link>$co_url</link>\n" .
5445                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5446                               "<content:encoded>" .
5447                               "<![CDATA[\n";
5448                 } elsif ($format eq 'atom') {
5449                         print "<entry>\n" .
5450                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5451                               "<updated>$cd{'iso-8601'}</updated>\n" .
5452                               "<author>\n" .
5453                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5454                         if ($co{'author_email'}) {
5455                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5456                         }
5457                         print "</author>\n" .
5458                               # use committer for contributor
5459                               "<contributor>\n" .
5460                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5461                         if ($co{'committer_email'}) {
5462                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5463                         }
5464                         print "</contributor>\n" .
5465                               "<published>$cd{'iso-8601'}</published>\n" .
5466                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5467                               "<id>$co_url</id>\n" .
5468                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5469                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5470                 }
5471                 my $comment = $co{'comment'};
5472                 print "<pre>\n";
5473                 foreach my $line (@$comment) {
5474                         $line = esc_html($line);
5475                         print "$line\n";
5476                 }
5477                 print "</pre><ul>\n";
5478                 foreach my $difftree_line (@difftree) {
5479                         my %difftree = parse_difftree_raw_line($difftree_line);
5480                         next if !$difftree{'from_id'};
5481
5482                         my $file = $difftree{'file'} || $difftree{'to_file'};
5483
5484                         print "<li>" .
5485                               "[" .
5486                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5487                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5488                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5489                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5490                                       -title => "diff"}, 'D');
5491                         if ($have_blame) {
5492                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5493                                                              file_name=>$file, hash_base=>$commit),
5494                                               -title => "blame"}, 'B');
5495                         }
5496                         # if this is not a feed of a file history
5497                         if (!defined $file_name || $file_name ne $file) {
5498                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5499                                                              file_name=>$file, hash=>$commit),
5500                                               -title => "history"}, 'H');
5501                         }
5502                         $file = esc_path($file);
5503                         print "] ".
5504                               "$file</li>\n";
5505                 }
5506                 if ($format eq 'rss') {
5507                         print "</ul>]]>\n" .
5508                               "</content:encoded>\n" .
5509                               "</item>\n";
5510                 } elsif ($format eq 'atom') {
5511                         print "</ul>\n</div>\n" .
5512                               "</content>\n" .
5513                               "</entry>\n";
5514                 }
5515         }
5516
5517         # end of feed
5518         if ($format eq 'rss') {
5519                 print "</channel>\n</rss>\n";
5520         }       elsif ($format eq 'atom') {
5521                 print "</feed>\n";
5522         }
5523 }
5524
5525 sub git_rss {
5526         git_feed('rss');
5527 }
5528
5529 sub git_atom {
5530         git_feed('atom');
5531 }
5532
5533 sub git_opml {
5534         my @list = git_get_projects_list();
5535
5536         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5537         print <<XML;
5538 <?xml version="1.0" encoding="utf-8"?>
5539 <opml version="1.0">
5540 <head>
5541   <title>$site_name OPML Export</title>
5542 </head>
5543 <body>
5544 <outline text="git RSS feeds">
5545 XML
5546
5547         foreach my $pr (@list) {
5548                 my %proj = %$pr;
5549                 my $head = git_get_head_hash($proj{'path'});
5550                 if (!defined $head) {
5551                         next;
5552                 }
5553                 $git_dir = "$projectroot/$proj{'path'}";
5554                 my %co = parse_commit($head);
5555                 if (!%co) {
5556                         next;
5557                 }
5558
5559                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5560                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5561                 my $html = "$my_url?p=$proj{'path'};a=summary";
5562                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5563         }
5564         print <<XML;
5565 </outline>
5566 </body>
5567 </opml>
5568 XML
5569 }