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