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                 @fmts = grep { defined } map {
 312                         exists $known_snapshot_format_aliases{$_} ?
 313                                 $known_snapshot_format_aliases{$_} : $_ } @fmts;
 314                 @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 361 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 362
 363 # version of the core git binary
 364 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 365
 366 $projects_list ||= $projectroot;
 367
 368 # ======================================================================
 369 # input validation and dispatch
 370 our $action = $cgi->param('a');
 371 if (defined $action) {
 372         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 373                 die_error(undef, "Invalid action parameter");
 374         }
 375 }
 376
 377 # parameters which are pathnames
 378 our $project = $cgi->param('p');
 379 if (defined $project) {
 380         if (!validate_pathname($project) ||
 381             !(-d "$projectroot/$project") ||
 382             !check_head_link("$projectroot/$project") ||
 383             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 384             ($strict_export && !project_in_list($project))) {
 385                 undef $project;
 386                 die_error(undef, "No such project");
 387         }
 388 }
 389
 390 our $file_name = $cgi->param('f');
 391 if (defined $file_name) {
 392         if (!validate_pathname($file_name)) {
 393                 die_error(undef, "Invalid file parameter");
 394         }
 395 }
 396
 397 our $file_parent = $cgi->param('fp');
 398 if (defined $file_parent) {
 399         if (!validate_pathname($file_parent)) {
 400                 die_error(undef, "Invalid file parent parameter");
 401         }
 402 }
 403
 404 # parameters which are refnames
 405 our $hash = $cgi->param('h');
 406 if (defined $hash) {
 407         if (!validate_refname($hash)) {
 408                 die_error(undef, "Invalid hash parameter");
 409         }
 410 }
 411
 412 our $hash_parent = $cgi->param('hp');
 413 if (defined $hash_parent) {
 414         if (!validate_refname($hash_parent)) {
 415                 die_error(undef, "Invalid hash parent parameter");
 416         }
 417 }
 418
 419 our $hash_base = $cgi->param('hb');
 420 if (defined $hash_base) {
 421         if (!validate_refname($hash_base)) {
 422                 die_error(undef, "Invalid hash base parameter");
 423         }
 424 }
 425
 426 my %allowed_options = (
 427         "--no-merges" => [ qw(rss atom log shortlog history) ],
 428 );
 429
 430 our @extra_options = $cgi->param('opt');
 431 if (defined @extra_options) {
 432         foreach(@extra_options)
 433         {
 434                 if (not grep(/^$_$/, keys %allowed_options)) {
 435                         die_error(undef, "Invalid option parameter");
 436                 }
 437                 if (not grep(/^$action$/, @{$allowed_options{$_}})) {
 438                         die_error(undef, "Invalid option parameter for this action");
 439                 }
 440         }
 441 }
 442
 443 our $hash_parent_base = $cgi->param('hpb');
 444 if (defined $hash_parent_base) {
 445         if (!validate_refname($hash_parent_base)) {
 446                 die_error(undef, "Invalid hash parent base parameter");
 447         }
 448 }
 449
 450 # other parameters
 451 our $page = $cgi->param('pg');
 452 if (defined $page) {
 453         if ($page =~ m/[^0-9]/) {
 454                 die_error(undef, "Invalid page parameter");
 455         }
 456 }
 457
 458 our $searchtype = $cgi->param('st');
 459 if (defined $searchtype) {
 460         if ($searchtype =~ m/[^a-z]/) {
 461                 die_error(undef, "Invalid searchtype parameter");
 462         }
 463 }
 464
 465 our $searchtext = $cgi->param('s');
 466 our $search_regexp;
 467 if (defined $searchtext) {
 468         if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 469                 die_error(undef, "Invalid search parameter");
 470         }
 471         if (length($searchtext) < 2) {
 472                 die_error(undef, "At least two characters are required for search parameter");
 473         }
 474         $search_regexp = quotemeta $searchtext;
 475 }
 476
 477 # now read PATH_INFO and use it as alternative to parameters
 478 sub evaluate_path_info {
 479         return if defined $project;
 480         my $path_info = $ENV{"PATH_INFO"};
 481         return if !$path_info;
 482         $path_info =~ s,^/+,,;
 483         return if !$path_info;
 484         # find which part of PATH_INFO is project
 485         $project = $path_info;
 486         $project =~ s,/+$,,;
 487         while ($project && !check_head_link("$projectroot/$project")) {
 488                 $project =~ s,/*[^/]*$,,;
 489         }
 490         # validate project
 491         $project = validate_pathname($project);
 492         if (!$project ||
 493             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 494             ($strict_export && !project_in_list($project))) {
 495                 undef $project;
 496                 return;
 497         }
 498         # do not change any parameters if an action is given using the query string
 499         return if $action;
 500         $path_info =~ s,^$project/*,,;
 501         my ($refname, $pathname) = split(/:/, $path_info, 2);
 502         if (defined $pathname) {
 503                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 504                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 505                 $pathname =~ s,^/+,,;
 506                 if (!$pathname || substr($pathname, -1) eq "/") {
 507                         $action  ||= "tree";
 508                         $pathname =~ s,/$,,;
 509                 } else {
 510                         $action  ||= "blob_plain";
 511                 }
 512                 $hash_base ||= validate_refname($refname);
 513                 $file_name ||= validate_pathname($pathname);
 514         } elsif (defined $refname) {
 515                 # we got "project.git/branch"
 516                 $action ||= "shortlog";
 517                 $hash   ||= validate_refname($refname);
 518         }
 519 }
 520 evaluate_path_info();
 521
 522 # path to the current git repository
 523 our $git_dir;
 524 $git_dir = "$projectroot/$project" if $project;
 525
 526 # dispatch
 527 my %actions = (
 528         "blame" => \&git_blame2,
 529         "blobdiff" => \&git_blobdiff,
 530         "blobdiff_plain" => \&git_blobdiff_plain,
 531         "blob" => \&git_blob,
 532         "blob_plain" => \&git_blob_plain,
 533         "commitdiff" => \&git_commitdiff,
 534         "commitdiff_plain" => \&git_commitdiff_plain,
 535         "commit" => \&git_commit,
 536         "forks" => \&git_forks,
 537         "heads" => \&git_heads,
 538         "history" => \&git_history,
 539         "log" => \&git_log,
 540         "rss" => \&git_rss,
 541         "atom" => \&git_atom,
 542         "search" => \&git_search,
 543         "search_help" => \&git_search_help,
 544         "shortlog" => \&git_shortlog,
 545         "summary" => \&git_summary,
 546         "tag" => \&git_tag,
 547         "tags" => \&git_tags,
 548         "tree" => \&git_tree,
 549         "snapshot" => \&git_snapshot,
 550         "object" => \&git_object,
 551         # those below don't need $project
 552         "opml" => \&git_opml,
 553         "project_list" => \&git_project_list,
 554         "project_index" => \&git_project_index,
 555 );
 556
 557 if (!defined $action) {
 558         if (defined $hash) {
 559                 $action = git_get_type($hash);
 560         } elsif (defined $hash_base && defined $file_name) {
 561                 $action = git_get_type("$hash_base:$file_name");
 562         } elsif (defined $project) {
 563                 $action = 'summary';
 564         } else {
 565                 $action = 'project_list';
 566         }
 567 }
 568 if (!defined($actions{$action})) {
 569         die_error(undef, "Unknown action");
 570 }
 571 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 572     !$project) {
 573         die_error(undef, "Project needed");
 574 }
 575 $actions{$action}->();
 576 exit;
 577
 578 ## ======================================================================
 579 ## action links
 580
 581 sub href(%) {
 582         my %params = @_;
 583         # default is to use -absolute url() i.e. $my_uri
 584         my $href = $params{-full} ? $my_url : $my_uri;
 585
 586         # XXX: Warning: If you touch this, check the search form for updating,
 587         # too.
 588
 589         my @mapping = (
 590                 project => "p",
 591                 action => "a",
 592                 file_name => "f",
 593                 file_parent => "fp",
 594                 extra_options => "opt",
 595                 hash => "h",
 596                 hash_parent => "hp",
 597                 hash_base => "hb",
 598                 hash_parent_base => "hpb",
 599                 page => "pg",
 600                 order => "o",
 601                 searchtext => "s",
 602                 searchtype => "st",
 603                 snapshot_format => "sf",
 604         );
 605         my %mapping = @mapping;
 606
 607         $params{'project'} = $project unless exists $params{'project'};
 608
 609         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 610         if ($use_pathinfo) {
 611                 # use PATH_INFO for project name
 612                 $href .= "/$params{'project'}" if defined $params{'project'};
 613                 delete $params{'project'};
 614
 615                 # Summary just uses the project path URL
 616                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 617                         delete $params{'action'};
 618                 }
 619         }
 620
 621         # now encode the parameters explicitly
 622         my @result = ();
 623         for (my $i = 0; $i < @mapping; $i += 2) {
 624                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 625                 if (defined $params{$name}) {
 626                         push @result, $symbol . "=" . esc_param($params{$name});
 627                 }
 628         }
 629         $href .= "?" . join(';', @result) if scalar @result;
 630
 631         return $href;
 632 }
 633
 634
 635 ## ======================================================================
 636 ## validation, quoting/unquoting and escaping
 637
 638 sub validate_pathname {
 639         my $input = shift || return undef;
 640
 641         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 642         # at the beginning, at the end, and between slashes.
 643         # also this catches doubled slashes
 644         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 645                 return undef;
 646         }
 647         # no null characters
 648         if ($input =~ m!\0!) {
 649                 return undef;
 650         }
 651         return $input;
 652 }
 653
 654 sub validate_refname {
 655         my $input = shift || return undef;
 656
 657         # textual hashes are O.K.
 658         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 659                 return $input;
 660         }
 661         # it must be correct pathname
 662         $input = validate_pathname($input)
 663                 or return undef;
 664         # restrictions on ref name according to git-check-ref-format
 665         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 666                 return undef;
 667         }
 668         return $input;
 669 }
 670
 671 # decode sequences of octets in utf8 into Perl's internal form,
 672 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 673 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 674 sub to_utf8 {
 675         my $str = shift;
 676         my $res;
 677         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 678         if (defined $res) {
 679                 return $res;
 680         } else {
 681                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 682         }
 683 }
 684
 685 # quote unsafe chars, but keep the slash, even when it's not
 686 # correct, but quoted slashes look too horrible in bookmarks
 687 sub esc_param {
 688         my $str = shift;
 689         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 690         $str =~ s/\+/%2B/g;
 691         $str =~ s/ /\+/g;
 692         return $str;
 693 }
 694
 695 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 696 sub esc_url {
 697         my $str = shift;
 698         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 699         $str =~ s/\+/%2B/g;
 700         $str =~ s/ /\+/g;
 701         return $str;
 702 }
 703
 704 # replace invalid utf8 character with SUBSTITUTION sequence
 705 sub esc_html ($;%) {
 706         my $str = shift;
 707         my %opts = @_;
 708
 709         $str = to_utf8($str);
 710         $str = $cgi->escapeHTML($str);
 711         if ($opts{'-nbsp'}) {
 712                 $str =~ s/ /&nbsp;/g;
 713         }
 714         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 715         return $str;
 716 }
 717
 718 # quote control characters and escape filename to HTML
 719 sub esc_path {
 720         my $str = shift;
 721         my %opts = @_;
 722
 723         $str = to_utf8($str);
 724         $str = $cgi->escapeHTML($str);
 725         if ($opts{'-nbsp'}) {
 726                 $str =~ s/ /&nbsp;/g;
 727         }
 728         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 729         return $str;
 730 }
 731
 732 # Make control characters "printable", using character escape codes (CEC)
 733 sub quot_cec {
 734         my $cntrl = shift;
 735         my %es = ( # character escape codes, aka escape sequences
 736                    "\t" => '\t',   # tab            (HT)
 737                    "\n" => '\n',   # line feed      (LF)
 738                    "\r" => '\r',   # carrige return (CR)
 739                    "\f" => '\f',   # form feed      (FF)
 740                    "\b" => '\b',   # backspace      (BS)
 741                    "\a" => '\a',   # alarm (bell)   (BEL)
 742                    "\e" => '\e',   # escape         (ESC)
 743                    "\013" => '\v', # vertical tab   (VT)
 744                    "\000" => '\0', # nul character  (NUL)
 745                    );
 746         my $chr = ( (exists $es{$cntrl})
 747                     ? $es{$cntrl}
 748                     : sprintf('\%03o', ord($cntrl)) );
 749         return "<span class=\"cntrl\">$chr</span>";
 750 }
 751
 752 # Alternatively use unicode control pictures codepoints,
 753 # Unicode "printable representation" (PR)
 754 sub quot_upr {
 755         my $cntrl = shift;
 756         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 757         return "<span class=\"cntrl\">$chr</span>";
 758 }
 759
 760 # git may return quoted and escaped filenames
 761 sub unquote {
 762         my $str = shift;
 763
 764         sub unq {
 765                 my $seq = shift;
 766                 my %es = ( # character escape codes, aka escape sequences
 767                         't' => "\t",   # tab            (HT, TAB)
 768                         'n' => "\n",   # newline        (NL)
 769                         'r' => "\r",   # return         (CR)
 770                         'f' => "\f",   # form feed      (FF)
 771                         'b' => "\b",   # backspace      (BS)
 772                         'a' => "\a",   # alarm (bell)   (BEL)
 773                         'e' => "\e",   # escape         (ESC)
 774                         'v' => "\013", # vertical tab   (VT)
 775                 );
 776
 777                 if ($seq =~ m/^[0-7]{1,3}$/) {
 778                         # octal char sequence
 779                         return chr(oct($seq));
 780                 } elsif (exists $es{$seq}) {
 781                         # C escape sequence, aka character escape code
 782                         return $es{$seq}
 783                 }
 784                 # quoted ordinary character
 785                 return $seq;
 786         }
 787
 788         if ($str =~ m/^"(.*)"$/) {
 789                 # needs unquoting
 790                 $str = $1;
 791                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 792         }
 793         return $str;
 794 }
 795
 796 # escape tabs (convert tabs to spaces)
 797 sub untabify {
 798         my $line = shift;
 799
 800         while ((my $pos = index($line, "\t")) != -1) {
 801                 if (my $count = (8 - ($pos % 8))) {
 802                         my $spaces = ' ' x $count;
 803                         $line =~ s/\t/$spaces/;
 804                 }
 805         }
 806
 807         return $line;
 808 }
 809
 810 sub project_in_list {
 811         my $project = shift;
 812         my @list = git_get_projects_list();
 813         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 814 }
 815
 816 ## ----------------------------------------------------------------------
 817 ## HTML aware string manipulation
 818
 819 sub chop_str {
 820         my $str = shift;
 821         my $len = shift;
 822         my $add_len = shift || 10;
 823
 824         # allow only $len chars, but don't cut a word if it would fit in $add_len
 825         # if it doesn't fit, cut it if it's still longer than the dots we would add
 826         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 827         my $body = $1;
 828         my $tail = $2;
 829         if (length($tail) > 4) {
 830                 $tail = " ...";
 831                 $body =~ s/&[^;]*$//; # remove chopped character entities
 832         }
 833         return "$body$tail";
 834 }
 835
 836 ## ----------------------------------------------------------------------
 837 ## functions returning short strings
 838
 839 # CSS class for given age value (in seconds)
 840 sub age_class {
 841         my $age = shift;
 842
 843         if (!defined $age) {
 844                 return "noage";
 845         } elsif ($age < 60*60*2) {
 846                 return "age0";
 847         } elsif ($age < 60*60*24*2) {
 848                 return "age1";
 849         } else {
 850                 return "age2";
 851         }
 852 }
 853
 854 # convert age in seconds to "nn units ago" string
 855 sub age_string {
 856         my $age = shift;
 857         my $age_str;
 858
 859         if ($age > 60*60*24*365*2) {
 860                 $age_str = (int $age/60/60/24/365);
 861                 $age_str .= " years ago";
 862         } elsif ($age > 60*60*24*(365/12)*2) {
 863                 $age_str = int $age/60/60/24/(365/12);
 864                 $age_str .= " months ago";
 865         } elsif ($age > 60*60*24*7*2) {
 866                 $age_str = int $age/60/60/24/7;
 867                 $age_str .= " weeks ago";
 868         } elsif ($age > 60*60*24*2) {
 869                 $age_str = int $age/60/60/24;
 870                 $age_str .= " days ago";
 871         } elsif ($age > 60*60*2) {
 872                 $age_str = int $age/60/60;
 873                 $age_str .= " hours ago";
 874         } elsif ($age > 60*2) {
 875                 $age_str = int $age/60;
 876                 $age_str .= " min ago";
 877         } elsif ($age > 2) {
 878                 $age_str = int $age;
 879                 $age_str .= " sec ago";
 880         } else {
 881                 $age_str .= " right now";
 882         }
 883         return $age_str;
 884 }
 885
 886 # convert file mode in octal to symbolic file mode string
 887 sub mode_str {
 888         my $mode = oct shift;
 889
 890         if (S_ISDIR($mode & S_IFMT)) {
 891                 return 'drwxr-xr-x';
 892         } elsif (S_ISLNK($mode)) {
 893                 return 'lrwxrwxrwx';
 894         } elsif (S_ISREG($mode)) {
 895                 # git cares only about the executable bit
 896                 if ($mode & S_IXUSR) {
 897                         return '-rwxr-xr-x';
 898                 } else {
 899                         return '-rw-r--r--';
 900                 };
 901         } else {
 902                 return '----------';
 903         }
 904 }
 905
 906 # convert file mode in octal to file type string
 907 sub file_type {
 908         my $mode = shift;
 909
 910         if ($mode !~ m/^[0-7]+$/) {
 911                 return $mode;
 912         } else {
 913                 $mode = oct $mode;
 914         }
 915
 916         if (S_ISDIR($mode & S_IFMT)) {
 917                 return "directory";
 918         } elsif (S_ISLNK($mode)) {
 919                 return "symlink";
 920         } elsif (S_ISREG($mode)) {
 921                 return "file";
 922         } else {
 923                 return "unknown";
 924         }
 925 }
 926
 927 # convert file mode in octal to file type description string
 928 sub file_type_long {
 929         my $mode = shift;
 930
 931         if ($mode !~ m/^[0-7]+$/) {
 932                 return $mode;
 933         } else {
 934                 $mode = oct $mode;
 935         }
 936
 937         if (S_ISDIR($mode & S_IFMT)) {
 938                 return "directory";
 939         } elsif (S_ISLNK($mode)) {
 940                 return "symlink";
 941         } elsif (S_ISREG($mode)) {
 942                 if ($mode & S_IXUSR) {
 943                         return "executable";
 944                 } else {
 945                         return "file";
 946                 };
 947         } else {
 948                 return "unknown";
 949         }
 950 }
 951
 952
 953 ## ----------------------------------------------------------------------
 954 ## functions returning short HTML fragments, or transforming HTML fragments
 955 ## which don't belong to other sections
 956
 957 # format line of commit message.
 958 sub format_log_line_html {
 959         my $line = shift;
 960
 961         $line = esc_html($line, -nbsp=>1);
 962         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 963                 my $hash_text = $1;
 964                 my $link =
 965                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 966                                 -class => "text"}, $hash_text);
 967                 $line =~ s/$hash_text/$link/;
 968         }
 969         return $line;
 970 }
 971
 972 # format marker of refs pointing to given object
 973 sub format_ref_marker {
 974         my ($refs, $id) = @_;
 975         my $markers = '';
 976
 977         if (defined $refs->{$id}) {
 978                 foreach my $ref (@{$refs->{$id}}) {
 979                         my ($type, $name) = qw();
 980                         # e.g. tags/v2.6.11 or heads/next
 981                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
 982                                 $type = $1;
 983                                 $name = $2;
 984                         } else {
 985                                 $type = "ref";
 986                                 $name = $ref;
 987                         }
 988
 989                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
 990                                     esc_html($name) . "</span>";
 991                 }
 992         }
 993
 994         if ($markers) {
 995                 return ' <span class="refs">'. $markers . '</span>';
 996         } else {
 997                 return "";
 998         }
 999 }
1000
1001 # format, perhaps shortened and with markers, title line
1002 sub format_subject_html {
1003         my ($long, $short, $href, $extra) = @_;
1004         $extra = '' unless defined($extra);
1005
1006         if (length($short) < length($long)) {
1007                 return $cgi->a({-href => $href, -class => "list subject",
1008                                 -title => to_utf8($long)},
1009                        esc_html($short) . $extra);
1010         } else {
1011                 return $cgi->a({-href => $href, -class => "list subject"},
1012                        esc_html($long)  . $extra);
1013         }
1014 }
1015
1016 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1017 sub format_git_diff_header_line {
1018         my $line = shift;
1019         my $diffinfo = shift;
1020         my ($from, $to) = @_;
1021
1022         if ($diffinfo->{'nparents'}) {
1023                 # combined diff
1024                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1025                 if ($to->{'href'}) {
1026                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1027                                          esc_path($to->{'file'}));
1028                 } else { # file was deleted (no href)
1029                         $line .= esc_path($to->{'file'});
1030                 }
1031         } else {
1032                 # "ordinary" diff
1033                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1034                 if ($from->{'href'}) {
1035                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1036                                          'a/' . esc_path($from->{'file'}));
1037                 } else { # file was added (no href)
1038                         $line .= 'a/' . esc_path($from->{'file'});
1039                 }
1040                 $line .= ' ';
1041                 if ($to->{'href'}) {
1042                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1043                                          'b/' . esc_path($to->{'file'}));
1044                 } else { # file was deleted
1045                         $line .= 'b/' . esc_path($to->{'file'});
1046                 }
1047         }
1048
1049         return "<div class=\"diff header\">$line</div>\n";
1050 }
1051
1052 # format extended diff header line, before patch itself
1053 sub format_extended_diff_header_line {
1054         my $line = shift;
1055         my $diffinfo = shift;
1056         my ($from, $to) = @_;
1057
1058         # match <path>
1059         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1060                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1061                                        esc_path($from->{'file'}));
1062         }
1063         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1064                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1065                                  esc_path($to->{'file'}));
1066         }
1067         # match single <mode>
1068         if ($line =~ m/\s(\d{6})$/) {
1069                 $line .= '<span class="info"> (' .
1070                          file_type_long($1) .
1071                          ')</span>';
1072         }
1073         # match <hash>
1074         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1075                 # can match only for combined diff
1076                 $line = 'index ';
1077                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1078                         if ($from->{'href'}[$i]) {
1079                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1080                                                   -class=>"hash"},
1081                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1082                         } else {
1083                                 $line .= '0' x 7;
1084                         }
1085                         # separator
1086                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1087                 }
1088                 $line .= '..';
1089                 if ($to->{'href'}) {
1090                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1091                                          substr($diffinfo->{'to_id'},0,7));
1092                 } else {
1093                         $line .= '0' x 7;
1094                 }
1095
1096         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1097                 # can match only for ordinary diff
1098                 my ($from_link, $to_link);
1099                 if ($from->{'href'}) {
1100                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1101                                              substr($diffinfo->{'from_id'},0,7));
1102                 } else {
1103                         $from_link = '0' x 7;
1104                 }
1105                 if ($to->{'href'}) {
1106                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1107                                            substr($diffinfo->{'to_id'},0,7));
1108                 } else {
1109                         $to_link = '0' x 7;
1110                 }
1111                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1112                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1113         }
1114
1115         return $line . "<br/>\n";
1116 }
1117
1118 # format from-file/to-file diff header
1119 sub format_diff_from_to_header {
1120         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1121         my $line;
1122         my $result = '';
1123
1124         $line = $from_line;
1125         #assert($line =~ m/^---/) if DEBUG;
1126         # no extra formatting for "^--- /dev/null"
1127         if (! $diffinfo->{'nparents'}) {
1128                 # ordinary (single parent) diff
1129                 if ($line =~ m!^--- "?a/!) {
1130                         if ($from->{'href'}) {
1131                                 $line = '--- a/' .
1132                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1133                                                 esc_path($from->{'file'}));
1134                         } else {
1135                                 $line = '--- a/' .
1136                                         esc_path($from->{'file'});
1137                         }
1138                 }
1139                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1140
1141         } else {
1142                 # combined diff (merge commit)
1143                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1144                         if ($from->{'href'}[$i]) {
1145                                 $line = '--- ' .
1146                                         $cgi->a({-href=>href(action=>"blobdiff",
1147                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1148                                                              hash_parent_base=>$parents[$i],
1149                                                              file_parent=>$from->{'file'}[$i],
1150                                                              hash=>$diffinfo->{'to_id'},
1151                                                              hash_base=>$hash,
1152                                                              file_name=>$to->{'file'}),
1153                                                  -class=>"path",
1154                                                  -title=>"diff" . ($i+1)},
1155                                                 $i+1) .
1156                                         '/' .
1157                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1158                                                 esc_path($from->{'file'}[$i]));
1159                         } else {
1160                                 $line = '--- /dev/null';
1161                         }
1162                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1163                 }
1164         }
1165
1166         $line = $to_line;
1167         #assert($line =~ m/^\+\+\+/) if DEBUG;
1168         # no extra formatting for "^+++ /dev/null"
1169         if ($line =~ m!^\+\+\+ "?b/!) {
1170                 if ($to->{'href'}) {
1171                         $line = '+++ b/' .
1172                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1173                                         esc_path($to->{'file'}));
1174                 } else {
1175                         $line = '+++ b/' .
1176                                 esc_path($to->{'file'});
1177                 }
1178         }
1179         $result .= qq!<div class="diff to_file">$line</div>\n!;
1180
1181         return $result;
1182 }
1183
1184 # create note for patch simplified by combined diff
1185 sub format_diff_cc_simplified {
1186         my ($diffinfo, @parents) = @_;
1187         my $result = '';
1188
1189         $result .= "<div class=\"diff header\">" .
1190                    "diff --cc ";
1191         if (!is_deleted($diffinfo)) {
1192                 $result .= $cgi->a({-href => href(action=>"blob",
1193                                                   hash_base=>$hash,
1194                                                   hash=>$diffinfo->{'to_id'},
1195                                                   file_name=>$diffinfo->{'to_file'}),
1196                                     -class => "path"},
1197                                    esc_path($diffinfo->{'to_file'}));
1198         } else {
1199                 $result .= esc_path($diffinfo->{'to_file'});
1200         }
1201         $result .= "</div>\n" . # class="diff header"
1202                    "<div class=\"diff nodifferences\">" .
1203                    "Simple merge" .
1204                    "</div>\n"; # class="diff nodifferences"
1205
1206         return $result;
1207 }
1208
1209 # format patch (diff) line (not to be used for diff headers)
1210 sub format_diff_line {
1211         my $line = shift;
1212         my ($from, $to) = @_;
1213         my $diff_class = "";
1214
1215         chomp $line;
1216
1217         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1218                 # combined diff
1219                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1220                 if ($line =~ m/^\@{3}/) {
1221                         $diff_class = " chunk_header";
1222                 } elsif ($line =~ m/^\\/) {
1223                         $diff_class = " incomplete";
1224                 } elsif ($prefix =~ tr/+/+/) {
1225                         $diff_class = " add";
1226                 } elsif ($prefix =~ tr/-/-/) {
1227                         $diff_class = " rem";
1228                 }
1229         } else {
1230                 # assume ordinary diff
1231                 my $char = substr($line, 0, 1);
1232                 if ($char eq '+') {
1233                         $diff_class = " add";
1234                 } elsif ($char eq '-') {
1235                         $diff_class = " rem";
1236                 } elsif ($char eq '@') {
1237                         $diff_class = " chunk_header";
1238                 } elsif ($char eq "\\") {
1239                         $diff_class = " incomplete";
1240                 }
1241         }
1242         $line = untabify($line);
1243         if ($from && $to && $line =~ m/^\@{2} /) {
1244                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1245                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1246
1247                 $from_lines = 0 unless defined $from_lines;
1248                 $to_lines   = 0 unless defined $to_lines;
1249
1250                 if ($from->{'href'}) {
1251                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1252                                              -class=>"list"}, $from_text);
1253                 }
1254                 if ($to->{'href'}) {
1255                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1256                                              -class=>"list"}, $to_text);
1257                 }
1258                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1259                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1260                 return "<div class=\"diff$diff_class\">$line</div>\n";
1261         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1262                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1263                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1264
1265                 @from_text = split(' ', $ranges);
1266                 for (my $i = 0; $i < @from_text; ++$i) {
1267                         ($from_start[$i], $from_nlines[$i]) =
1268                                 (split(',', substr($from_text[$i], 1)), 0);
1269                 }
1270
1271                 $to_text   = pop @from_text;
1272                 $to_start  = pop @from_start;
1273                 $to_nlines = pop @from_nlines;
1274
1275                 $line = "<span class=\"chunk_info\">$prefix ";
1276                 for (my $i = 0; $i < @from_text; ++$i) {
1277                         if ($from->{'href'}[$i]) {
1278                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1279                                                   -class=>"list"}, $from_text[$i]);
1280                         } else {
1281                                 $line .= $from_text[$i];
1282                         }
1283                         $line .= " ";
1284                 }
1285                 if ($to->{'href'}) {
1286                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1287                                           -class=>"list"}, $to_text);
1288                 } else {
1289                         $line .= $to_text;
1290                 }
1291                 $line .= " $prefix</span>" .
1292                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1293                 return "<div class=\"diff$diff_class\">$line</div>\n";
1294         }
1295         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1296 }
1297
1298 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1299 # linked.  Pass the hash of the tree/commit to snapshot.
1300 sub format_snapshot_links {
1301         my ($hash) = @_;
1302         my @snapshot_fmts = gitweb_check_feature('snapshot');
1303         my $num_fmts = @snapshot_fmts;
1304         if ($num_fmts > 1) {
1305                 # A parenthesized list of links bearing format names.
1306                 return "snapshot (" . join(' ', map
1307                         $cgi->a({
1308                                 -href => href(
1309                                         action=>"snapshot",
1310                                         hash=>$hash,
1311                                         snapshot_format=>$_
1312                                 )
1313                         }, $known_snapshot_formats{$_}{'display'})
1314                 , @snapshot_fmts) . ")";
1315         } elsif ($num_fmts == 1) {
1316                 # A single "snapshot" link whose tooltip bears the format name.
1317                 my ($fmt) = @snapshot_fmts;
1318                 return $cgi->a({
1319                                 -href => href(
1320                                         action=>"snapshot",
1321                                         hash=>$hash,
1322                                         snapshot_format=>$fmt
1323                                 ),
1324                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1325                         }, "snapshot");
1326         } else { # $num_fmts == 0
1327                 return undef;
1328         }
1329 }
1330
1331 ## ----------------------------------------------------------------------
1332 ## git utility subroutines, invoking git commands
1333
1334 # returns path to the core git executable and the --git-dir parameter as list
1335 sub git_cmd {
1336         return $GIT, '--git-dir='.$git_dir;
1337 }
1338
1339 # returns path to the core git executable and the --git-dir parameter as string
1340 sub git_cmd_str {
1341         return join(' ', git_cmd());
1342 }
1343
1344 # get HEAD ref of given project as hash
1345 sub git_get_head_hash {
1346         my $project = shift;
1347         my $o_git_dir = $git_dir;
1348         my $retval = undef;
1349         $git_dir = "$projectroot/$project";
1350         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1351                 my $head = <$fd>;
1352                 close $fd;
1353                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1354                         $retval = $1;
1355                 }
1356         }
1357         if (defined $o_git_dir) {
1358                 $git_dir = $o_git_dir;
1359         }
1360         return $retval;
1361 }
1362
1363 # get type of given object
1364 sub git_get_type {
1365         my $hash = shift;
1366
1367         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1368         my $type = <$fd>;
1369         close $fd or return;
1370         chomp $type;
1371         return $type;
1372 }
1373
1374 sub git_get_project_config {
1375         my ($key, $type) = @_;
1376
1377         return unless ($key);
1378         $key =~ s/^gitweb\.//;
1379         return if ($key =~ m/\W/);
1380
1381         my @x = (git_cmd(), 'config');
1382         if (defined $type) { push @x, $type; }
1383         push @x, "--get";
1384         push @x, "gitweb.$key";
1385         my $val = qx(@x);
1386         chomp $val;
1387         return ($val);
1388 }
1389
1390 # get hash of given path at given ref
1391 sub git_get_hash_by_path {
1392         my $base = shift;
1393         my $path = shift || return undef;
1394         my $type = shift;
1395
1396         $path =~ s,/+$,,;
1397
1398         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1399                 or die_error(undef, "Open git-ls-tree failed");
1400         my $line = <$fd>;
1401         close $fd or return undef;
1402
1403         if (!defined $line) {
1404                 # there is no tree or hash given by $path at $base
1405                 return undef;
1406         }
1407
1408         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1409         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1410         if (defined $type && $type ne $2) {
1411                 # type doesn't match
1412                 return undef;
1413         }
1414         return $3;
1415 }
1416
1417 # get path of entry with given hash at given tree-ish (ref)
1418 # used to get 'from' filename for combined diff (merge commit) for renames
1419 sub git_get_path_by_hash {
1420         my $base = shift || return;
1421         my $hash = shift || return;
1422
1423         local $/ = "\0";
1424
1425         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1426                 or return undef;
1427         while (my $line = <$fd>) {
1428                 chomp $line;
1429
1430                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1431                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1432                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1433                         close $fd;
1434                         return $1;
1435                 }
1436         }
1437         close $fd;
1438         return undef;
1439 }
1440
1441 ## ......................................................................
1442 ## git utility functions, directly accessing git repository
1443
1444 sub git_get_project_description {
1445         my $path = shift;
1446
1447         open my $fd, "$projectroot/$path/description" or return undef;
1448         my $descr = <$fd>;
1449         close $fd;
1450         if (defined $descr) {
1451                 chomp $descr;
1452         }
1453         return $descr;
1454 }
1455
1456 sub git_get_project_url_list {
1457         my $path = shift;
1458
1459         open my $fd, "$projectroot/$path/cloneurl" or return;
1460         my @git_project_url_list = map { chomp; $_ } <$fd>;
1461         close $fd;
1462
1463         return wantarray ? @git_project_url_list : \@git_project_url_list;
1464 }
1465
1466 sub git_get_projects_list {
1467         my ($filter) = @_;
1468         my @list;
1469
1470         $filter ||= '';
1471         $filter =~ s/\.git$//;
1472
1473         my ($check_forks) = gitweb_check_feature('forks');
1474
1475         if (-d $projects_list) {
1476                 # search in directory
1477                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1478                 # remove the trailing "/"
1479                 $dir =~ s!/+$!!;
1480                 my $pfxlen = length("$dir");
1481
1482                 File::Find::find({
1483                         follow_fast => 1, # follow symbolic links
1484                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1485                         wanted => sub {
1486                                 # skip project-list toplevel, if we get it.
1487                                 return if (m!^[/.]$!);
1488                                 # only directories can be git repositories
1489                                 return unless (-d $_);
1490
1491                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1492                                 # we check related file in $projectroot
1493                                 if ($check_forks and $subdir =~ m#/.#) {
1494                                         $File::Find::prune = 1;
1495                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1496                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1497                                         $File::Find::prune = 1;
1498                                 }
1499                         },
1500                 }, "$dir");
1501
1502         } elsif (-f $projects_list) {
1503                 # read from file(url-encoded):
1504                 # 'git%2Fgit.git Linus+Torvalds'
1505                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1506                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1507                 my %paths;
1508                 open my ($fd), $projects_list or return;
1509         PROJECT:
1510                 while (my $line = <$fd>) {
1511                         chomp $line;
1512                         my ($path, $owner) = split ' ', $line;
1513                         $path = unescape($path);
1514                         $owner = unescape($owner);
1515                         if (!defined $path) {
1516                                 next;
1517                         }
1518                         if ($filter ne '') {
1519                                 # looking for forks;
1520                                 my $pfx = substr($path, 0, length($filter));
1521                                 if ($pfx ne $filter) {
1522                                         next PROJECT;
1523                                 }
1524                                 my $sfx = substr($path, length($filter));
1525                                 if ($sfx !~ /^\/.*\.git$/) {
1526                                         next PROJECT;
1527                                 }
1528                         } elsif ($check_forks) {
1529                         PATH:
1530                                 foreach my $filter (keys %paths) {
1531                                         # looking for forks;
1532                                         my $pfx = substr($path, 0, length($filter));
1533                                         if ($pfx ne $filter) {
1534                                                 next PATH;
1535                                         }
1536                                         my $sfx = substr($path, length($filter));
1537                                         if ($sfx !~ /^\/.*\.git$/) {
1538                                                 next PATH;
1539                                         }
1540                                         # is a fork, don't include it in
1541                                         # the list
1542                                         next PROJECT;
1543                                 }
1544                         }
1545                         if (check_export_ok("$projectroot/$path")) {
1546                                 my $pr = {
1547                                         path => $path,
1548                                         owner => to_utf8($owner),
1549                                 };
1550                                 push @list, $pr;
1551                                 (my $forks_path = $path) =~ s/\.git$//;
1552                                 $paths{$forks_path}++;
1553                         }
1554                 }
1555                 close $fd;
1556         }
1557         return @list;
1558 }
1559
1560 our $gitweb_project_owner = undef;
1561 sub git_get_project_list_from_file {
1562
1563         return if (defined $gitweb_project_owner);
1564
1565         $gitweb_project_owner = {};
1566         # read from file (url-encoded):
1567         # 'git%2Fgit.git Linus+Torvalds'
1568         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1569         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1570         if (-f $projects_list) {
1571                 open (my $fd , $projects_list);
1572                 while (my $line = <$fd>) {
1573                         chomp $line;
1574                         my ($pr, $ow) = split ' ', $line;
1575                         $pr = unescape($pr);
1576                         $ow = unescape($ow);
1577                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1578                 }
1579                 close $fd;
1580         }
1581 }
1582
1583 sub git_get_project_owner {
1584         my $project = shift;
1585         my $owner;
1586
1587         return undef unless $project;
1588
1589         if (!defined $gitweb_project_owner) {
1590                 git_get_project_list_from_file();
1591         }
1592
1593         if (exists $gitweb_project_owner->{$project}) {
1594                 $owner = $gitweb_project_owner->{$project};
1595         }
1596         if (!defined $owner) {
1597                 $owner = get_file_owner("$projectroot/$project");
1598         }
1599
1600         return $owner;
1601 }
1602
1603 sub git_get_last_activity {
1604         my ($path) = @_;
1605         my $fd;
1606
1607         $git_dir = "$projectroot/$path";
1608         open($fd, "-|", git_cmd(), 'for-each-ref',
1609              '--format=%(committer)',
1610              '--sort=-committerdate',
1611              '--count=1',
1612              'refs/heads') or return;
1613         my $most_recent = <$fd>;
1614         close $fd or return;
1615         if (defined $most_recent &&
1616             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1617                 my $timestamp = $1;
1618                 my $age = time - $timestamp;
1619                 return ($age, age_string($age));
1620         }
1621         return (undef, undef);
1622 }
1623
1624 sub git_get_references {
1625         my $type = shift || "";
1626         my %refs;
1627         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1628         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1629         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1630                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1631                 or return;
1632
1633         while (my $line = <$fd>) {
1634                 chomp $line;
1635                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1636                         if (defined $refs{$1}) {
1637                                 push @{$refs{$1}}, $2;
1638                         } else {
1639                                 $refs{$1} = [ $2 ];
1640                         }
1641                 }
1642         }
1643         close $fd or return;
1644         return \%refs;
1645 }
1646
1647 sub git_get_rev_name_tags {
1648         my $hash = shift || return undef;
1649
1650         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1651                 or return;
1652         my $name_rev = <$fd>;
1653         close $fd;
1654
1655         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1656                 return $1;
1657         } else {
1658                 # catches also '$hash undefined' output
1659                 return undef;
1660         }
1661 }
1662
1663 ## ----------------------------------------------------------------------
1664 ## parse to hash functions
1665
1666 sub parse_date {
1667         my $epoch = shift;
1668         my $tz = shift || "-0000";
1669
1670         my %date;
1671         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1672         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1673         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1674         $date{'hour'} = $hour;
1675         $date{'minute'} = $min;
1676         $date{'mday'} = $mday;
1677         $date{'day'} = $days[$wday];
1678         $date{'month'} = $months[$mon];
1679         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1680                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1681         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1682                              $mday, $months[$mon], $hour ,$min;
1683         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1684                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1685
1686         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1687         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1688         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1689         $date{'hour_local'} = $hour;
1690         $date{'minute_local'} = $min;
1691         $date{'tz_local'} = $tz;
1692         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1693                                   1900+$year, $mon+1, $mday,
1694                                   $hour, $min, $sec, $tz);
1695         return %date;
1696 }
1697
1698 sub parse_tag {
1699         my $tag_id = shift;
1700         my %tag;
1701         my @comment;
1702
1703         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1704         $tag{'id'} = $tag_id;
1705         while (my $line = <$fd>) {
1706                 chomp $line;
1707                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1708                         $tag{'object'} = $1;
1709                 } elsif ($line =~ m/^type (.+)$/) {
1710                         $tag{'type'} = $1;
1711                 } elsif ($line =~ m/^tag (.+)$/) {
1712                         $tag{'name'} = $1;
1713                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1714                         $tag{'author'} = $1;
1715                         $tag{'epoch'} = $2;
1716                         $tag{'tz'} = $3;
1717                 } elsif ($line =~ m/--BEGIN/) {
1718                         push @comment, $line;
1719                         last;
1720                 } elsif ($line eq "") {
1721                         last;
1722                 }
1723         }
1724         push @comment, <$fd>;
1725         $tag{'comment'} = \@comment;
1726         close $fd or return;
1727         if (!defined $tag{'name'}) {
1728                 return
1729         };
1730         return %tag
1731 }
1732
1733 sub parse_commit_text {
1734         my ($commit_text, $withparents) = @_;
1735         my @commit_lines = split '\n', $commit_text;
1736         my %co;
1737
1738         pop @commit_lines; # Remove '\0'
1739
1740         if (! @commit_lines) {
1741                 return;
1742         }
1743
1744         my $header = shift @commit_lines;
1745         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1746                 return;
1747         }
1748         ($co{'id'}, my @parents) = split ' ', $header;
1749         while (my $line = shift @commit_lines) {
1750                 last if $line eq "\n";
1751                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1752                         $co{'tree'} = $1;
1753                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1754                         push @parents, $1;
1755                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1756                         $co{'author'} = $1;
1757                         $co{'author_epoch'} = $2;
1758                         $co{'author_tz'} = $3;
1759                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1760                                 $co{'author_name'}  = $1;
1761                                 $co{'author_email'} = $2;
1762                         } else {
1763                                 $co{'author_name'} = $co{'author'};
1764                         }
1765                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1766                         $co{'committer'} = $1;
1767                         $co{'committer_epoch'} = $2;
1768                         $co{'committer_tz'} = $3;
1769                         $co{'committer_name'} = $co{'committer'};
1770                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1771                                 $co{'committer_name'}  = $1;
1772                                 $co{'committer_email'} = $2;
1773                         } else {
1774                                 $co{'committer_name'} = $co{'committer'};
1775                         }
1776                 }
1777         }
1778         if (!defined $co{'tree'}) {
1779                 return;
1780         };
1781         $co{'parents'} = \@parents;
1782         $co{'parent'} = $parents[0];
1783
1784         foreach my $title (@commit_lines) {
1785                 $title =~ s/^    //;
1786                 if ($title ne "") {
1787                         $co{'title'} = chop_str($title, 80, 5);
1788                         # remove leading stuff of merges to make the interesting part visible
1789                         if (length($title) > 50) {
1790                                 $title =~ s/^Automatic //;
1791                                 $title =~ s/^merge (of|with) /Merge ... /i;
1792                                 if (length($title) > 50) {
1793                                         $title =~ s/(http|rsync):\/\///;
1794                                 }
1795                                 if (length($title) > 50) {
1796                                         $title =~ s/(master|www|rsync)\.//;
1797                                 }
1798                                 if (length($title) > 50) {
1799                                         $title =~ s/kernel.org:?//;
1800                                 }
1801                                 if (length($title) > 50) {
1802                                         $title =~ s/\/pub\/scm//;
1803                                 }
1804                         }
1805                         $co{'title_short'} = chop_str($title, 50, 5);
1806                         last;
1807                 }
1808         }
1809         if ($co{'title'} eq "") {
1810                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1811         }
1812         # remove added spaces
1813         foreach my $line (@commit_lines) {
1814                 $line =~ s/^    //;
1815         }
1816         $co{'comment'} = \@commit_lines;
1817
1818         my $age = time - $co{'committer_epoch'};
1819         $co{'age'} = $age;
1820         $co{'age_string'} = age_string($age);
1821         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1822         if ($age > 60*60*24*7*2) {
1823                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1824                 $co{'age_string_age'} = $co{'age_string'};
1825         } else {
1826                 $co{'age_string_date'} = $co{'age_string'};
1827                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1828         }
1829         return %co;
1830 }
1831
1832 sub parse_commit {
1833         my ($commit_id) = @_;
1834         my %co;
1835
1836         local $/ = "\0";
1837
1838         open my $fd, "-|", git_cmd(), "rev-list",
1839                 "--parents",
1840                 "--header",
1841                 "--max-count=1",
1842                 $commit_id,
1843                 "--",
1844                 or die_error(undef, "Open git-rev-list failed");
1845         %co = parse_commit_text(<$fd>, 1);
1846         close $fd;
1847
1848         return %co;
1849 }
1850
1851 sub parse_commits {
1852         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1853         my @cos;
1854
1855         $maxcount ||= 1;
1856         $skip ||= 0;
1857
1858         local $/ = "\0";
1859
1860         open my $fd, "-|", git_cmd(), "rev-list",
1861                 "--header",
1862                 ($arg ? ($arg) : ()),
1863                 ("--max-count=" . $maxcount),
1864                 ("--skip=" . $skip),
1865                 @extra_options,
1866                 $commit_id,
1867                 "--",
1868                 ($filename ? ($filename) : ())
1869                 or die_error(undef, "Open git-rev-list failed");
1870         while (my $line = <$fd>) {
1871                 my %co = parse_commit_text($line);
1872                 push @cos, \%co;
1873         }
1874         close $fd;
1875
1876         return wantarray ? @cos : \@cos;
1877 }
1878
1879 # parse ref from ref_file, given by ref_id, with given type
1880 sub parse_ref {
1881         my $ref_file = shift;
1882         my $ref_id = shift;
1883         my $type = shift || git_get_type($ref_id);
1884         my %ref_item;
1885
1886         $ref_item{'type'} = $type;
1887         $ref_item{'id'} = $ref_id;
1888         $ref_item{'epoch'} = 0;
1889         $ref_item{'age'} = "unknown";
1890         if ($type eq "tag") {
1891                 my %tag = parse_tag($ref_id);
1892                 $ref_item{'comment'} = $tag{'comment'};
1893                 if ($tag{'type'} eq "commit") {
1894                         my %co = parse_commit($tag{'object'});
1895                         $ref_item{'epoch'} = $co{'committer_epoch'};
1896                         $ref_item{'age'} = $co{'age_string'};
1897                 } elsif (defined($tag{'epoch'})) {
1898                         my $age = time - $tag{'epoch'};
1899                         $ref_item{'epoch'} = $tag{'epoch'};
1900                         $ref_item{'age'} = age_string($age);
1901                 }
1902                 $ref_item{'reftype'} = $tag{'type'};
1903                 $ref_item{'name'} = $tag{'name'};
1904                 $ref_item{'refid'} = $tag{'object'};
1905         } elsif ($type eq "commit"){
1906                 my %co = parse_commit($ref_id);
1907                 $ref_item{'reftype'} = "commit";
1908                 $ref_item{'name'} = $ref_file;
1909                 $ref_item{'title'} = $co{'title'};
1910                 $ref_item{'refid'} = $ref_id;
1911                 $ref_item{'epoch'} = $co{'committer_epoch'};
1912                 $ref_item{'age'} = $co{'age_string'};
1913         } else {
1914                 $ref_item{'reftype'} = $type;
1915                 $ref_item{'name'} = $ref_file;
1916                 $ref_item{'refid'} = $ref_id;
1917         }
1918
1919         return %ref_item;
1920 }
1921
1922 # parse line of git-diff-tree "raw" output
1923 sub parse_difftree_raw_line {
1924         my $line = shift;
1925         my %res;
1926
1927         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1928         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1929         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1930                 $res{'from_mode'} = $1;
1931                 $res{'to_mode'} = $2;
1932                 $res{'from_id'} = $3;
1933                 $res{'to_id'} = $4;
1934                 $res{'status'} = $5;
1935                 $res{'similarity'} = $6;
1936                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1937                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1938                 } else {
1939                         $res{'file'} = unquote($7);
1940                 }
1941         }
1942         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1943         # combined diff (for merge commit)
1944         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1945                 $res{'nparents'}  = length($1);
1946                 $res{'from_mode'} = [ split(' ', $2) ];
1947                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1948                 $res{'from_id'} = [ split(' ', $3) ];
1949                 $res{'to_id'} = pop @{$res{'from_id'}};
1950                 $res{'status'} = [ split('', $4) ];
1951                 $res{'to_file'} = unquote($5);
1952         }
1953         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1954         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1955                 $res{'commit'} = $1;
1956         }
1957
1958         return wantarray ? %res : \%res;
1959 }
1960
1961 # parse line of git-ls-tree output
1962 sub parse_ls_tree_line ($;%) {
1963         my $line = shift;
1964         my %opts = @_;
1965         my %res;
1966
1967         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1968         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
1969
1970         $res{'mode'} = $1;
1971         $res{'type'} = $2;
1972         $res{'hash'} = $3;
1973         if ($opts{'-z'}) {
1974                 $res{'name'} = $4;
1975         } else {
1976                 $res{'name'} = unquote($4);
1977         }
1978
1979         return wantarray ? %res : \%res;
1980 }
1981
1982 # generates _two_ hashes, references to which are passed as 2 and 3 argument
1983 sub parse_from_to_diffinfo {
1984         my ($diffinfo, $from, $to, @parents) = @_;
1985
1986         if ($diffinfo->{'nparents'}) {
1987                 # combined diff
1988                 $from->{'file'} = [];
1989                 $from->{'href'} = [];
1990                 fill_from_file_info($diffinfo, @parents)
1991                         unless exists $diffinfo->{'from_file'};
1992                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1993                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
1994                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
1995                                 $from->{'href'}[$i] = href(action=>"blob",
1996                                                            hash_base=>$parents[$i],
1997                                                            hash=>$diffinfo->{'from_id'}[$i],
1998                                                            file_name=>$from->{'file'}[$i]);
1999                         } else {
2000                                 $from->{'href'}[$i] = undef;
2001                         }
2002                 }
2003         } else {
2004                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2005                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2006                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2007                                                hash=>$diffinfo->{'from_id'},
2008                                                file_name=>$from->{'file'});
2009                 } else {
2010                         delete $from->{'href'};
2011                 }
2012         }
2013
2014         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2015         if (!is_deleted($diffinfo)) { # file exists in result
2016                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2017                                      hash=>$diffinfo->{'to_id'},
2018                                      file_name=>$to->{'file'});
2019         } else {
2020                 delete $to->{'href'};
2021         }
2022 }
2023
2024 ## ......................................................................
2025 ## parse to array of hashes functions
2026
2027 sub git_get_heads_list {
2028         my $limit = shift;
2029         my @headslist;
2030
2031         open my $fd, '-|', git_cmd(), 'for-each-ref',
2032                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2033                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2034                 'refs/heads'
2035                 or return;
2036         while (my $line = <$fd>) {
2037                 my %ref_item;
2038
2039                 chomp $line;
2040                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2041                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2042                 my ($committer, $epoch, $tz) =
2043                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2044                 $name =~ s!^refs/heads/!!;
2045
2046                 $ref_item{'name'}  = $name;
2047                 $ref_item{'id'}    = $hash;
2048                 $ref_item{'title'} = $title || '(no commit message)';
2049                 $ref_item{'epoch'} = $epoch;
2050                 if ($epoch) {
2051                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2052                 } else {
2053                         $ref_item{'age'} = "unknown";
2054                 }
2055
2056                 push @headslist, \%ref_item;
2057         }
2058         close $fd;
2059
2060         return wantarray ? @headslist : \@headslist;
2061 }
2062
2063 sub git_get_tags_list {
2064         my $limit = shift;
2065         my @tagslist;
2066
2067         open my $fd, '-|', git_cmd(), 'for-each-ref',
2068                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2069                 '--format=%(objectname) %(objecttype) %(refname) '.
2070                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2071                 'refs/tags'
2072                 or return;
2073         while (my $line = <$fd>) {
2074                 my %ref_item;
2075
2076                 chomp $line;
2077                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2078                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2079                 my ($creator, $epoch, $tz) =
2080                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2081                 $name =~ s!^refs/tags/!!;
2082
2083                 $ref_item{'type'} = $type;
2084                 $ref_item{'id'} = $id;
2085                 $ref_item{'name'} = $name;
2086                 if ($type eq "tag") {
2087                         $ref_item{'subject'} = $title;
2088                         $ref_item{'reftype'} = $reftype;
2089                         $ref_item{'refid'}   = $refid;
2090                 } else {
2091                         $ref_item{'reftype'} = $type;
2092                         $ref_item{'refid'}   = $id;
2093                 }
2094
2095                 if ($type eq "tag" || $type eq "commit") {
2096                         $ref_item{'epoch'} = $epoch;
2097                         if ($epoch) {
2098                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2099                         } else {
2100                                 $ref_item{'age'} = "unknown";
2101                         }
2102                 }
2103
2104                 push @tagslist, \%ref_item;
2105         }
2106         close $fd;
2107
2108         return wantarray ? @tagslist : \@tagslist;
2109 }
2110
2111 ## ----------------------------------------------------------------------
2112 ## filesystem-related functions
2113
2114 sub get_file_owner {
2115         my $path = shift;
2116
2117         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2118         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2119         if (!defined $gcos) {
2120                 return undef;
2121         }
2122         my $owner = $gcos;
2123         $owner =~ s/[,;].*$//;
2124         return to_utf8($owner);
2125 }
2126
2127 ## ......................................................................
2128 ## mimetype related functions
2129
2130 sub mimetype_guess_file {
2131         my $filename = shift;
2132         my $mimemap = shift;
2133         -r $mimemap or return undef;
2134
2135         my %mimemap;
2136         open(MIME, $mimemap) or return undef;
2137         while (<MIME>) {
2138                 next if m/^#/; # skip comments
2139                 my ($mime, $exts) = split(/\t+/);
2140                 if (defined $exts) {
2141                         my @exts = split(/\s+/, $exts);
2142                         foreach my $ext (@exts) {
2143                                 $mimemap{$ext} = $mime;
2144                         }
2145                 }
2146         }
2147         close(MIME);
2148
2149         $filename =~ /\.([^.]*)$/;
2150         return $mimemap{$1};
2151 }
2152
2153 sub mimetype_guess {
2154         my $filename = shift;
2155         my $mime;
2156         $filename =~ /\./ or return undef;
2157
2158         if ($mimetypes_file) {
2159                 my $file = $mimetypes_file;
2160                 if ($file !~ m!^/!) { # if it is relative path
2161                         # it is relative to project
2162                         $file = "$projectroot/$project/$file";
2163                 }
2164                 $mime = mimetype_guess_file($filename, $file);
2165         }
2166         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2167         return $mime;
2168 }
2169
2170 sub blob_mimetype {
2171         my $fd = shift;
2172         my $filename = shift;
2173
2174         if ($filename) {
2175                 my $mime = mimetype_guess($filename);
2176                 $mime and return $mime;
2177         }
2178
2179         # just in case
2180         return $default_blob_plain_mimetype unless $fd;
2181
2182         if (-T $fd) {
2183                 return 'text/plain' .
2184                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2185         } elsif (! $filename) {
2186                 return 'application/octet-stream';
2187         } elsif ($filename =~ m/\.png$/i) {
2188                 return 'image/png';
2189         } elsif ($filename =~ m/\.gif$/i) {
2190                 return 'image/gif';
2191         } elsif ($filename =~ m/\.jpe?g$/i) {
2192                 return 'image/jpeg';
2193         } else {
2194                 return 'application/octet-stream';
2195         }
2196 }
2197
2198 ## ======================================================================
2199 ## functions printing HTML: header, footer, error page
2200
2201 sub git_header_html {
2202         my $status = shift || "200 OK";
2203         my $expires = shift;
2204
2205         my $title = "$site_name";
2206         if (defined $project) {
2207                 $title .= " - " . to_utf8($project);
2208                 if (defined $action) {
2209                         $title .= "/$action";
2210                         if (defined $file_name) {
2211                                 $title .= " - " . esc_path($file_name);
2212                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2213                                         $title .= "/";
2214                                 }
2215                         }
2216                 }
2217         }
2218         my $content_type;
2219         # require explicit support from the UA if we are to send the page as
2220         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2221         # we have to do this because MSIE sometimes globs '*/*', pretending to
2222         # support xhtml+xml but choking when it gets what it asked for.
2223         if (defined $cgi->http('HTTP_ACCEPT') &&
2224             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2225             $cgi->Accept('application/xhtml+xml') != 0) {
2226                 $content_type = 'application/xhtml+xml';
2227         } else {
2228                 $content_type = 'text/html';
2229         }
2230         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2231                            -status=> $status, -expires => $expires);
2232         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2233         print <<EOF;
2234 <?xml version="1.0" encoding="utf-8"?>
2235 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2236 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2237 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2238 <!-- git core binaries version $git_version -->
2239 <head>
2240 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2241 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2242 <meta name="robots" content="index, nofollow"/>
2243 <title>$title</title>
2244 EOF
2245 # print out each stylesheet that exist
2246         if (defined $stylesheet) {
2247 #provides backwards capability for those people who define style sheet in a config file
2248                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2249         } else {
2250                 foreach my $stylesheet (@stylesheets) {
2251                         next unless $stylesheet;
2252                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2253                 }
2254         }
2255         if (defined $project) {
2256                 printf('<link rel="alternate" title="%s log RSS feed" '.
2257                        'href="%s" type="application/rss+xml" />'."\n",
2258                        esc_param($project), href(action=>"rss"));
2259                 printf('<link rel="alternate" title="%s log Atom feed" '.
2260                        'href="%s" type="application/atom+xml" />'."\n",
2261                        esc_param($project), href(action=>"atom"));
2262         } else {
2263                 printf('<link rel="alternate" title="%s projects list" '.
2264                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2265                        $site_name, href(project=>undef, action=>"project_index"));
2266                 printf('<link rel="alternate" title="%s projects feeds" '.
2267                        'href="%s" type="text/x-opml"/>'."\n",
2268                        $site_name, href(project=>undef, action=>"opml"));
2269         }
2270         if (defined $favicon) {
2271                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2272         }
2273
2274         print "</head>\n" .
2275               "<body>\n";
2276
2277         if (-f $site_header) {
2278                 open (my $fd, $site_header);
2279                 print <$fd>;
2280                 close $fd;
2281         }
2282
2283         print "<div class=\"page_header\">\n" .
2284               $cgi->a({-href => esc_url($logo_url),
2285                        -title => $logo_label},
2286                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2287         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2288         if (defined $project) {
2289                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2290                 if (defined $action) {
2291                         print " / $action";
2292                 }
2293                 print "\n";
2294         }
2295         print "</div>\n";
2296
2297         my ($have_search) = gitweb_check_feature('search');
2298         if ((defined $project) && ($have_search)) {
2299                 if (!defined $searchtext) {
2300                         $searchtext = "";
2301                 }
2302                 my $search_hash;
2303                 if (defined $hash_base) {
2304                         $search_hash = $hash_base;
2305                 } elsif (defined $hash) {
2306                         $search_hash = $hash;
2307                 } else {
2308                         $search_hash = "HEAD";
2309                 }
2310                 my $action = $my_uri;
2311                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2312                 if ($use_pathinfo) {
2313                         $action .= "/$project";
2314                 } else {
2315                         $cgi->param("p", $project);
2316                 }
2317                 $cgi->param("a", "search");
2318                 $cgi->param("h", $search_hash);
2319                 print $cgi->startform(-method => "get", -action => $action) .
2320                       "<div class=\"search\">\n" .
2321                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2322                       $cgi->hidden(-name => "a") . "\n" .
2323                       $cgi->hidden(-name => "h") . "\n" .
2324                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2325                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2326                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2327                       " search:\n",
2328                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2329                       "</div>" .
2330                       $cgi->end_form() . "\n";
2331         }
2332 }
2333
2334 sub git_footer_html {
2335         print "<div class=\"page_footer\">\n";
2336         if (defined $project) {
2337                 my $descr = git_get_project_description($project);
2338                 if (defined $descr) {
2339                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2340                 }
2341                 print $cgi->a({-href => href(action=>"rss"),
2342                               -class => "rss_logo"}, "RSS") . " ";
2343                 print $cgi->a({-href => href(action=>"atom"),
2344                               -class => "rss_logo"}, "Atom") . "\n";
2345         } else {
2346                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2347                               -class => "rss_logo"}, "OPML") . " ";
2348                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2349                               -class => "rss_logo"}, "TXT") . "\n";
2350         }
2351         print "</div>\n" ;
2352
2353         if (-f $site_footer) {
2354                 open (my $fd, $site_footer);
2355                 print <$fd>;
2356                 close $fd;
2357         }
2358
2359         print "</body>\n" .
2360               "</html>";
2361 }
2362
2363 sub die_error {
2364         my $status = shift || "403 Forbidden";
2365         my $error = shift || "Malformed query, file missing or permission denied";
2366
2367         git_header_html($status);
2368         print <<EOF;
2369 <div class="page_body">
2370 <br /><br />
2371 $status - $error
2372 <br />
2373 </div>
2374 EOF
2375         git_footer_html();
2376         exit;
2377 }
2378
2379 ## ----------------------------------------------------------------------
2380 ## functions printing or outputting HTML: navigation
2381
2382 sub git_print_page_nav {
2383         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2384         $extra = '' if !defined $extra; # pager or formats
2385
2386         my @navs = qw(summary shortlog log commit commitdiff tree);
2387         if ($suppress) {
2388                 @navs = grep { $_ ne $suppress } @navs;
2389         }
2390
2391         my %arg = map { $_ => {action=>$_} } @navs;
2392         if (defined $head) {
2393                 for (qw(commit commitdiff)) {
2394                         $arg{$_}{'hash'} = $head;
2395                 }
2396                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2397                         for (qw(shortlog log)) {
2398                                 $arg{$_}{'hash'} = $head;
2399                         }
2400                 }
2401         }
2402         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2403         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2404
2405         print "<div class=\"page_nav\">\n" .
2406                 (join " | ",
2407                  map { $_ eq $current ?
2408                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2409                  } @navs);
2410         print "<br/>\n$extra<br/>\n" .
2411               "</div>\n";
2412 }
2413
2414 sub format_paging_nav {
2415         my ($action, $hash, $head, $page, $nrevs) = @_;
2416         my $paging_nav;
2417
2418
2419         if ($hash ne $head || $page) {
2420                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2421         } else {
2422                 $paging_nav .= "HEAD";
2423         }
2424
2425         if ($page > 0) {
2426                 $paging_nav .= " &sdot; " .
2427                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2428                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2429         } else {
2430                 $paging_nav .= " &sdot; prev";
2431         }
2432
2433         if ($nrevs >= (100 * ($page+1)-1)) {
2434                 $paging_nav .= " &sdot; " .
2435                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2436                                  -accesskey => "n", -title => "Alt-n"}, "next");
2437         } else {
2438                 $paging_nav .= " &sdot; next";
2439         }
2440
2441         return $paging_nav;
2442 }
2443
2444 ## ......................................................................
2445 ## functions printing or outputting HTML: div
2446
2447 sub git_print_header_div {
2448         my ($action, $title, $hash, $hash_base) = @_;
2449         my %args = ();
2450
2451         $args{'action'} = $action;
2452         $args{'hash'} = $hash if $hash;
2453         $args{'hash_base'} = $hash_base if $hash_base;
2454
2455         print "<div class=\"header\">\n" .
2456               $cgi->a({-href => href(%args), -class => "title"},
2457               $title ? $title : $action) .
2458               "\n</div>\n";
2459 }
2460
2461 #sub git_print_authorship (\%) {
2462 sub git_print_authorship {
2463         my $co = shift;
2464
2465         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2466         print "<div class=\"author_date\">" .
2467               esc_html($co->{'author_name'}) .
2468               " [$ad{'rfc2822'}";
2469         if ($ad{'hour_local'} < 6) {
2470                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2471                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2472         } else {
2473                 printf(" (%02d:%02d %s)",
2474                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2475         }
2476         print "]</div>\n";
2477 }
2478
2479 sub git_print_page_path {
2480         my $name = shift;
2481         my $type = shift;
2482         my $hb = shift;
2483
2484
2485         print "<div class=\"page_path\">";
2486         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2487                       -title => 'tree root'}, to_utf8("[$project]"));
2488         print " / ";
2489         if (defined $name) {
2490                 my @dirname = split '/', $name;
2491                 my $basename = pop @dirname;
2492                 my $fullname = '';
2493
2494                 foreach my $dir (@dirname) {
2495                         $fullname .= ($fullname ? '/' : '') . $dir;
2496                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2497                                                      hash_base=>$hb),
2498                                       -title => $fullname}, esc_path($dir));
2499                         print " / ";
2500                 }
2501                 if (defined $type && $type eq 'blob') {
2502                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2503                                                      hash_base=>$hb),
2504                                       -title => $name}, esc_path($basename));
2505                 } elsif (defined $type && $type eq 'tree') {
2506                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2507                                                      hash_base=>$hb),
2508                                       -title => $name}, esc_path($basename));
2509                         print " / ";
2510                 } else {
2511                         print esc_path($basename);
2512                 }
2513         }
2514         print "<br/></div>\n";
2515 }
2516
2517 # sub git_print_log (\@;%) {
2518 sub git_print_log ($;%) {
2519         my $log = shift;
2520         my %opts = @_;
2521
2522         if ($opts{'-remove_title'}) {
2523                 # remove title, i.e. first line of log
2524                 shift @$log;
2525         }
2526         # remove leading empty lines
2527         while (defined $log->[0] && $log->[0] eq "") {
2528                 shift @$log;
2529         }
2530
2531         # print log
2532         my $signoff = 0;
2533         my $empty = 0;
2534         foreach my $line (@$log) {
2535                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2536                         $signoff = 1;
2537                         $empty = 0;
2538                         if (! $opts{'-remove_signoff'}) {
2539                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2540                                 next;
2541                         } else {
2542                                 # remove signoff lines
2543                                 next;
2544                         }
2545                 } else {
2546                         $signoff = 0;
2547                 }
2548
2549                 # print only one empty line
2550                 # do not print empty line after signoff
2551                 if ($line eq "") {
2552                         next if ($empty || $signoff);
2553                         $empty = 1;
2554                 } else {
2555                         $empty = 0;
2556                 }
2557
2558                 print format_log_line_html($line) . "<br/>\n";
2559         }
2560
2561         if ($opts{'-final_empty_line'}) {
2562                 # end with single empty line
2563                 print "<br/>\n" unless $empty;
2564         }
2565 }
2566
2567 # return link target (what link points to)
2568 sub git_get_link_target {
2569         my $hash = shift;
2570         my $link_target;
2571
2572         # read link
2573         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2574                 or return;
2575         {
2576                 local $/;
2577                 $link_target = <$fd>;
2578         }
2579         close $fd
2580                 or return;
2581
2582         return $link_target;
2583 }
2584
2585 # given link target, and the directory (basedir) the link is in,
2586 # return target of link relative to top directory (top tree);
2587 # return undef if it is not possible (including absolute links).
2588 sub normalize_link_target {
2589         my ($link_target, $basedir, $hash_base) = @_;
2590
2591         # we can normalize symlink target only if $hash_base is provided
2592         return unless $hash_base;
2593
2594         # absolute symlinks (beginning with '/') cannot be normalized
2595         return if (substr($link_target, 0, 1) eq '/');
2596
2597         # normalize link target to path from top (root) tree (dir)
2598         my $path;
2599         if ($basedir) {
2600                 $path = $basedir . '/' . $link_target;
2601         } else {
2602                 # we are in top (root) tree (dir)
2603                 $path = $link_target;
2604         }
2605
2606         # remove //, /./, and /../
2607         my @path_parts;
2608         foreach my $part (split('/', $path)) {
2609                 # discard '.' and ''
2610                 next if (!$part || $part eq '.');
2611                 # handle '..'
2612                 if ($part eq '..') {
2613                         if (@path_parts) {
2614                                 pop @path_parts;
2615                         } else {
2616                                 # link leads outside repository (outside top dir)
2617                                 return;
2618                         }
2619                 } else {
2620                         push @path_parts, $part;
2621                 }
2622         }
2623         $path = join('/', @path_parts);
2624
2625         return $path;
2626 }
2627
2628 # print tree entry (row of git_tree), but without encompassing <tr> element
2629 sub git_print_tree_entry {
2630         my ($t, $basedir, $hash_base, $have_blame) = @_;
2631
2632         my %base_key = ();
2633         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2634
2635         # The format of a table row is: mode list link.  Where mode is
2636         # the mode of the entry, list is the name of the entry, an href,
2637         # and link is the action links of the entry.
2638
2639         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2640         if ($t->{'type'} eq "blob") {
2641                 print "<td class=\"list\">" .
2642                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2643                                                file_name=>"$basedir$t->{'name'}", %base_key),
2644                                 -class => "list"}, esc_path($t->{'name'}));
2645                 if (S_ISLNK(oct $t->{'mode'})) {
2646                         my $link_target = git_get_link_target($t->{'hash'});
2647                         if ($link_target) {
2648                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2649                                 if (defined $norm_target) {
2650                                         print " -> " .
2651                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2652                                                                      file_name=>$norm_target),
2653                                                        -title => $norm_target}, esc_path($link_target));
2654                                 } else {
2655                                         print " -> " . esc_path($link_target);
2656                                 }
2657                         }
2658                 }
2659                 print "</td>\n";
2660                 print "<td class=\"link\">";
2661                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2662                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2663                               "blob");
2664                 if ($have_blame) {
2665                         print " | " .
2666                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2667                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2668                                       "blame");
2669                 }
2670                 if (defined $hash_base) {
2671                         print " | " .
2672                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2673                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2674                                       "history");
2675                 }
2676                 print " | " .
2677                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2678                                                file_name=>"$basedir$t->{'name'}")},
2679                                 "raw");
2680                 print "</td>\n";
2681
2682         } elsif ($t->{'type'} eq "tree") {
2683                 print "<td class=\"list\">";
2684                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2685                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2686                               esc_path($t->{'name'}));
2687                 print "</td>\n";
2688                 print "<td class=\"link\">";
2689                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2690                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2691                               "tree");
2692                 if (defined $hash_base) {
2693                         print " | " .
2694                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2695                                                      file_name=>"$basedir$t->{'name'}")},
2696                                       "history");
2697                 }
2698                 print "</td>\n";
2699         }
2700 }
2701
2702 ## ......................................................................
2703 ## functions printing large fragments of HTML
2704
2705 sub fill_from_file_info {
2706         my ($diff, @parents) = @_;
2707
2708         $diff->{'from_file'} = [ ];
2709         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2710         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2711                 if ($diff->{'status'}[$i] eq 'R' ||
2712                     $diff->{'status'}[$i] eq 'C') {
2713                         $diff->{'from_file'}[$i] =
2714                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2715                 }
2716         }
2717
2718         return $diff;
2719 }
2720
2721 # parameters can be strings, or references to arrays of strings
2722 sub from_ids_eq {
2723         my ($a, $b) = @_;
2724
2725         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2726                 for (my $i = 0; $i < @$a; ++$i) {
2727                         return 0 unless ($a->[$i] eq $b->[$i]);
2728                 }
2729                 return 1;
2730         } elsif (!ref($a) && !ref($b)) {
2731                 return $a eq $b;
2732         } else {
2733                 return 0;
2734         }
2735 }
2736
2737 sub is_deleted {
2738         my $diffinfo = shift;
2739
2740         return $diffinfo->{'to_id'} eq ('0' x 40);
2741 }
2742
2743 sub git_difftree_body {
2744         my ($difftree, $hash, @parents) = @_;
2745         my ($parent) = $parents[0];
2746         my ($have_blame) = gitweb_check_feature('blame');
2747         print "<div class=\"list_head\">\n";
2748         if ($#{$difftree} > 10) {
2749                 print(($#{$difftree} + 1) . " files changed:\n");
2750         }
2751         print "</div>\n";
2752
2753         print "<table class=\"" .
2754               (@parents > 1 ? "combined " : "") .
2755               "diff_tree\">\n";
2756
2757         # header only for combined diff in 'commitdiff' view
2758         my $has_header = @parents > 1 && $action eq 'commitdiff';
2759         if ($has_header) {
2760                 # table header
2761                 print "<thead><tr>\n" .
2762                        "<th></th><th></th>\n"; # filename, patchN link
2763                 for (my $i = 0; $i < @parents; $i++) {
2764                         my $par = $parents[$i];
2765                         print "<th>" .
2766                               $cgi->a({-href => href(action=>"commitdiff",
2767                                                      hash=>$hash, hash_parent=>$par),
2768                                        -title => 'commitdiff to parent number ' .
2769                                                   ($i+1) . ': ' . substr($par,0,7)},
2770                                       $i+1) .
2771                               "&nbsp;</th>\n";
2772                 }
2773                 print "</tr></thead>\n<tbody>\n";
2774         }
2775
2776         my $alternate = 1;
2777         my $patchno = 0;
2778         foreach my $line (@{$difftree}) {
2779                 my $diff;
2780                 if (ref($line) eq "HASH") {
2781                         # pre-parsed (or generated by hand)
2782                         $diff = $line;
2783                 } else {
2784                         $diff = parse_difftree_raw_line($line);
2785                 }
2786
2787                 if ($alternate) {
2788                         print "<tr class=\"dark\">\n";
2789                 } else {
2790                         print "<tr class=\"light\">\n";
2791                 }
2792                 $alternate ^= 1;
2793
2794                 if (exists $diff->{'nparents'}) { # combined diff
2795
2796                         fill_from_file_info($diff, @parents)
2797                                 unless exists $diff->{'from_file'};
2798
2799                         if (!is_deleted($diff)) {
2800                                 # file exists in the result (child) commit
2801                                 print "<td>" .
2802                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2803                                                              file_name=>$diff->{'to_file'},
2804                                                              hash_base=>$hash),
2805                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2806                                       "</td>\n";
2807                         } else {
2808                                 print "<td>" .
2809                                       esc_path($diff->{'to_file'}) .
2810                                       "</td>\n";
2811                         }
2812
2813                         if ($action eq 'commitdiff') {
2814                                 # link to patch
2815                                 $patchno++;
2816                                 print "<td class=\"link\">" .
2817                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2818                                       " | " .
2819                                       "</td>\n";
2820                         }
2821
2822                         my $has_history = 0;
2823                         my $not_deleted = 0;
2824                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2825                                 my $hash_parent = $parents[$i];
2826                                 my $from_hash = $diff->{'from_id'}[$i];
2827                                 my $from_path = $diff->{'from_file'}[$i];
2828                                 my $status = $diff->{'status'}[$i];
2829
2830                                 $has_history ||= ($status ne 'A');
2831                                 $not_deleted ||= ($status ne 'D');
2832
2833                                 if ($status eq 'A') {
2834                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2835                                 } elsif ($status eq 'D') {
2836                                         print "<td class=\"link\">" .
2837                                               $cgi->a({-href => href(action=>"blob",
2838                                                                      hash_base=>$hash,
2839                                                                      hash=>$from_hash,
2840                                                                      file_name=>$from_path)},
2841                                                       "blob" . ($i+1)) .
2842                                               " | </td>\n";
2843                                 } else {
2844                                         if ($diff->{'to_id'} eq $from_hash) {
2845                                                 print "<td class=\"link nochange\">";
2846                                         } else {
2847                                                 print "<td class=\"link\">";
2848                                         }
2849                                         print $cgi->a({-href => href(action=>"blobdiff",
2850                                                                      hash=>$diff->{'to_id'},
2851                                                                      hash_parent=>$from_hash,
2852                                                                      hash_base=>$hash,
2853                                                                      hash_parent_base=>$hash_parent,
2854                                                                      file_name=>$diff->{'to_file'},
2855                                                                      file_parent=>$from_path)},
2856                                                       "diff" . ($i+1)) .
2857                                               " | </td>\n";
2858                                 }
2859                         }
2860
2861                         print "<td class=\"link\">";
2862                         if ($not_deleted) {
2863                                 print $cgi->a({-href => href(action=>"blob",
2864                                                              hash=>$diff->{'to_id'},
2865                                                              file_name=>$diff->{'to_file'},
2866                                                              hash_base=>$hash)},
2867                                               "blob");
2868                                 print " | " if ($has_history);
2869                         }
2870                         if ($has_history) {
2871                                 print $cgi->a({-href => href(action=>"history",
2872                                                              file_name=>$diff->{'to_file'},
2873                                                              hash_base=>$hash)},
2874                                               "history");
2875                         }
2876                         print "</td>\n";
2877
2878                         print "</tr>\n";
2879                         next; # instead of 'else' clause, to avoid extra indent
2880                 }
2881                 # else ordinary diff
2882
2883                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2884                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2885                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2886                         $to_mode_oct = oct $diff->{'to_mode'};
2887                         if (S_ISREG($to_mode_oct)) { # only for regular file
2888                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2889                         }
2890                         $to_file_type = file_type($diff->{'to_mode'});
2891                 }
2892                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2893                         $from_mode_oct = oct $diff->{'from_mode'};
2894                         if (S_ISREG($to_mode_oct)) { # only for regular file
2895                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2896                         }
2897                         $from_file_type = file_type($diff->{'from_mode'});
2898                 }
2899
2900                 if ($diff->{'status'} eq "A") { # created
2901                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2902                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2903                         $mode_chng   .= "]</span>";
2904                         print "<td>";
2905                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2906                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2907                                       -class => "list"}, esc_path($diff->{'file'}));
2908                         print "</td>\n";
2909                         print "<td>$mode_chng</td>\n";
2910                         print "<td class=\"link\">";
2911                         if ($action eq 'commitdiff') {
2912                                 # link to patch
2913                                 $patchno++;
2914                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2915                                 print " | ";
2916                         }
2917                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2918                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2919                                       "blob");
2920                         print "</td>\n";
2921
2922                 } elsif ($diff->{'status'} eq "D") { # deleted
2923                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2924                         print "<td>";
2925                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2926                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2927                                        -class => "list"}, esc_path($diff->{'file'}));
2928                         print "</td>\n";
2929                         print "<td>$mode_chng</td>\n";
2930                         print "<td class=\"link\">";
2931                         if ($action eq 'commitdiff') {
2932                                 # link to patch
2933                                 $patchno++;
2934                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2935                                 print " | ";
2936                         }
2937                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2938                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2939                                       "blob") . " | ";
2940                         if ($have_blame) {
2941                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2942                                                              file_name=>$diff->{'file'})},
2943                                               "blame") . " | ";
2944                         }
2945                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
2946                                                      file_name=>$diff->{'file'})},
2947                                       "history");
2948                         print "</td>\n";
2949
2950                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
2951                         my $mode_chnge = "";
2952                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
2953                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
2954                                 if ($from_file_type ne $to_file_type) {
2955                                         $mode_chnge .= " from $from_file_type to $to_file_type";
2956                                 }
2957                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
2958                                         if ($from_mode_str && $to_mode_str) {
2959                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
2960                                         } elsif ($to_mode_str) {
2961                                                 $mode_chnge .= " mode: $to_mode_str";
2962                                         }
2963                                 }
2964                                 $mode_chnge .= "]</span>\n";
2965                         }
2966                         print "<td>";
2967                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2968                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2969                                       -class => "list"}, esc_path($diff->{'file'}));
2970                         print "</td>\n";
2971                         print "<td>$mode_chnge</td>\n";
2972                         print "<td class=\"link\">";
2973                         if ($action eq 'commitdiff') {
2974                                 # link to patch
2975                                 $patchno++;
2976                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
2977                                       " | ";
2978                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
2979                                 # "commit" view and modified file (not onlu mode changed)
2980                                 print $cgi->a({-href => href(action=>"blobdiff",
2981                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
2982                                                              hash_base=>$hash, hash_parent_base=>$parent,
2983                                                              file_name=>$diff->{'file'})},
2984                                               "diff") .
2985                                       " | ";
2986                         }
2987                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2988                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2989                                        "blob") . " | ";
2990                         if ($have_blame) {
2991                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
2992                                                              file_name=>$diff->{'file'})},
2993                                               "blame") . " | ";
2994                         }
2995                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
2996                                                      file_name=>$diff->{'file'})},
2997                                       "history");
2998                         print "</td>\n";
2999
3000                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3001                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3002                         my $nstatus = $status_name{$diff->{'status'}};
3003                         my $mode_chng = "";
3004                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3005                                 # mode also for directories, so we cannot use $to_mode_str
3006                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3007                         }
3008                         print "<td>" .
3009                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3010                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3011                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3012                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3013                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3014                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3015                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3016                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3017                               "<td class=\"link\">";
3018                         if ($action eq 'commitdiff') {
3019                                 # link to patch
3020                                 $patchno++;
3021                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3022                                       " | ";
3023                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3024                                 # "commit" view and modified file (not only pure rename or copy)
3025                                 print $cgi->a({-href => href(action=>"blobdiff",
3026                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3027                                                              hash_base=>$hash, hash_parent_base=>$parent,
3028                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3029                                               "diff") .
3030                                       " | ";
3031                         }
3032                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3033                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3034                                       "blob") . " | ";
3035                         if ($have_blame) {
3036                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3037                                                              file_name=>$diff->{'to_file'})},
3038                                               "blame") . " | ";
3039                         }
3040                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3041                                                     file_name=>$diff->{'to_file'})},
3042                                       "history");
3043                         print "</td>\n";
3044
3045                 } # we should not encounter Unmerged (U) or Unknown (X) status
3046                 print "</tr>\n";
3047         }
3048         print "</tbody>" if $has_header;
3049         print "</table>\n";
3050 }
3051
3052 sub git_patchset_body {
3053         my ($fd, $difftree, $hash, @hash_parents) = @_;
3054         my ($hash_parent) = $hash_parents[0];
3055
3056         my $patch_idx = 0;
3057         my $patch_number = 0;
3058         my $patch_line;
3059         my $diffinfo;
3060         my (%from, %to);
3061
3062         print "<div class=\"patchset\">\n";
3063
3064         # skip to first patch
3065         while ($patch_line = <$fd>) {
3066                 chomp $patch_line;
3067
3068                 last if ($patch_line =~ m/^diff /);
3069         }
3070
3071  PATCH:
3072         while ($patch_line) {
3073                 my @diff_header;
3074                 my ($from_id, $to_id);
3075
3076                 # git diff header
3077                 #assert($patch_line =~ m/^diff /) if DEBUG;
3078                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3079                 $patch_number++;
3080                 push @diff_header, $patch_line;
3081
3082                 # extended diff header
3083         EXTENDED_HEADER:
3084                 while ($patch_line = <$fd>) {
3085                         chomp $patch_line;
3086
3087                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3088
3089                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3090                                 $from_id = $1;
3091                                 $to_id   = $2;
3092                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3093                                 $from_id = [ split(',', $1) ];
3094                                 $to_id   = $2;
3095                         }
3096
3097                         push @diff_header, $patch_line;
3098                 }
3099                 my $last_patch_line = $patch_line;
3100
3101                 # check if current patch belong to current raw line
3102                 # and parse raw git-diff line if needed
3103                 if (defined $diffinfo &&
3104                     defined $from_id && defined $to_id &&
3105                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3106                     $diffinfo->{'to_id'} eq $to_id) {
3107                         # this is continuation of a split patch
3108                         print "<div class=\"patch cont\">\n";
3109                 } else {
3110                         # advance raw git-diff output if needed
3111                         $patch_idx++ if defined $diffinfo;
3112
3113                         # compact combined diff output can have some patches skipped
3114                         # find which patch (using pathname of result) we are at now
3115                         my $to_name;
3116                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3117                                 $to_name = $1;
3118                         }
3119
3120                         do {
3121                                 # read and prepare patch information
3122                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3123                                         # pre-parsed (or generated by hand)
3124                                         $diffinfo = $difftree->[$patch_idx];
3125                                 } else {
3126                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3127                                 }
3128
3129                                 # check if current raw line has no patch (it got simplified)
3130                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3131                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3132                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3133                                               "</div>\n";  # class="patch"
3134
3135                                         $patch_idx++;
3136                                         $patch_number++;
3137                                 }
3138                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3139                                  $patch_idx > $#$difftree);
3140                         # modifies %from, %to hashes
3141                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3142                         if ($diffinfo->{'nparents'}) {
3143                                 # combined diff
3144                                 $from{'file'} = [];
3145                                 $from{'href'} = [];
3146                                 fill_from_file_info($diffinfo, @hash_parents)
3147                                         unless exists $diffinfo->{'from_file'};
3148                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3149                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3150                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3151                                                 $from{'href'}[$i] = href(action=>"blob",
3152                                                                          hash_base=>$hash_parents[$i],
3153                                                                          hash=>$diffinfo->{'from_id'}[$i],
3154                                                                          file_name=>$from{'file'}[$i]);
3155                                         } else {
3156                                                 $from{'href'}[$i] = undef;
3157                                         }
3158                                 }
3159                         } else {
3160                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3161                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3162                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3163                                                              hash=>$diffinfo->{'from_id'},
3164                                                              file_name=>$from{'file'});
3165                                 } else {
3166                                         delete $from{'href'};
3167                                 }
3168                         }
3169
3170                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3171                         if (!is_deleted($diffinfo)) { # file exists in result
3172                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3173                                                    hash=>$diffinfo->{'to_id'},
3174                                                    file_name=>$to{'file'});
3175                         } else {
3176                                 delete $to{'href'};
3177                         }
3178                         # this is first patch for raw difftree line with $patch_idx index
3179                         # we index @$difftree array from 0, but number patches from 1
3180                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3181                 }
3182
3183                 # print "git diff" header
3184                 $patch_line = shift @diff_header;
3185                 print format_git_diff_header_line($patch_line, $diffinfo,
3186                                                   \%from, \%to);
3187
3188                 # print extended diff header
3189                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3190         EXTENDED_HEADER:
3191                 foreach $patch_line (@diff_header) {
3192                         print format_extended_diff_header_line($patch_line, $diffinfo,
3193                                                                \%from, \%to);
3194                 }
3195                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3196
3197                 # from-file/to-file diff header
3198                 $patch_line = $last_patch_line;
3199                 if (! $patch_line) {
3200                         print "</div>\n"; # class="patch"
3201                         last PATCH;
3202                 }
3203                 next PATCH if ($patch_line =~ m/^diff /);
3204                 #assert($patch_line =~ m/^---/) if DEBUG;
3205                 #assert($patch_line eq $last_patch_line) if DEBUG;
3206
3207                 $patch_line = <$fd>;
3208                 chomp $patch_line;
3209                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3210
3211                 print format_diff_from_to_header($last_patch_line, $patch_line,
3212                                                  $diffinfo, \%from, \%to,
3213                                                  @hash_parents);
3214
3215                 # the patch itself
3216         LINE:
3217                 while ($patch_line = <$fd>) {
3218                         chomp $patch_line;
3219
3220                         next PATCH if ($patch_line =~ m/^diff /);
3221
3222                         print format_diff_line($patch_line, \%from, \%to);
3223                 }
3224
3225         } continue {
3226                 print "</div>\n"; # class="patch"
3227         }
3228
3229         # for compact combined (--cc) format, with chunk and patch simpliciaction
3230         # patchset might be empty, but there might be unprocessed raw lines
3231         for ($patch_idx++ if $patch_number > 0;
3232              $patch_idx < @$difftree;
3233              $patch_idx++) {
3234                 # read and prepare patch information
3235                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3236                         # pre-parsed (or generated by hand)
3237                         $diffinfo = $difftree->[$patch_idx];
3238                 } else {
3239                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3240                 }
3241
3242                 # generate anchor for "patch" links in difftree / whatchanged part
3243                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3244                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3245                       "</div>\n";  # class="patch"
3246
3247                 $patch_number++;
3248         }
3249
3250         if ($patch_number == 0) {
3251                 if (@hash_parents > 1) {
3252                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3253                 } else {
3254                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3255                 }
3256         }
3257
3258         print "</div>\n"; # class="patchset"
3259 }
3260
3261 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3262
3263 sub git_project_list_body {
3264         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3265
3266         my ($check_forks) = gitweb_check_feature('forks');
3267
3268         my @projects;
3269         foreach my $pr (@$projlist) {
3270                 my (@aa) = git_get_last_activity($pr->{'path'});
3271                 unless (@aa) {
3272                         next;
3273                 }
3274                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3275                 if (!defined $pr->{'descr'}) {
3276                         my $descr = git_get_project_description($pr->{'path'}) || "";
3277                         $pr->{'descr_long'} = to_utf8($descr);
3278                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3279                 }
3280                 if (!defined $pr->{'owner'}) {
3281                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3282                 }
3283                 if ($check_forks) {
3284                         my $pname = $pr->{'path'};
3285                         if (($pname =~ s/\.git$//) &&
3286                             ($pname !~ /\/$/) &&
3287                             (-d "$projectroot/$pname")) {
3288                                 $pr->{'forks'} = "-d $projectroot/$pname";
3289                         }
3290                         else {
3291                                 $pr->{'forks'} = 0;
3292                         }
3293                 }
3294                 push @projects, $pr;
3295         }
3296
3297         $order ||= $default_projects_order;
3298         $from = 0 unless defined $from;
3299         $to = $#projects if (!defined $to || $#projects < $to);
3300
3301         print "<table class=\"project_list\">\n";
3302         unless ($no_header) {
3303                 print "<tr>\n";
3304                 if ($check_forks) {
3305                         print "<th></th>\n";
3306                 }
3307                 if ($order eq "project") {
3308                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3309                         print "<th>Project</th>\n";
3310                 } else {
3311                         print "<th>" .
3312                               $cgi->a({-href => href(project=>undef, order=>'project'),
3313                                        -class => "header"}, "Project") .
3314                               "</th>\n";
3315                 }
3316                 if ($order eq "descr") {
3317                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3318                         print "<th>Description</th>\n";
3319                 } else {
3320                         print "<th>" .
3321                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3322                                        -class => "header"}, "Description") .
3323                               "</th>\n";
3324                 }
3325                 if ($order eq "owner") {
3326                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3327                         print "<th>Owner</th>\n";
3328                 } else {
3329                         print "<th>" .
3330                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3331                                        -class => "header"}, "Owner") .
3332                               "</th>\n";
3333                 }
3334                 if ($order eq "age") {
3335                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3336                         print "<th>Last Change</th>\n";
3337                 } else {
3338                         print "<th>" .
3339                               $cgi->a({-href => href(project=>undef, order=>'age'),
3340                                        -class => "header"}, "Last Change") .
3341                               "</th>\n";
3342                 }
3343                 print "<th></th>\n" .
3344                       "</tr>\n";
3345         }
3346         my $alternate = 1;
3347         for (my $i = $from; $i <= $to; $i++) {
3348                 my $pr = $projects[$i];
3349                 if ($alternate) {
3350                         print "<tr class=\"dark\">\n";
3351                 } else {
3352                         print "<tr class=\"light\">\n";
3353                 }
3354                 $alternate ^= 1;
3355                 if ($check_forks) {
3356                         print "<td>";
3357                         if ($pr->{'forks'}) {
3358                                 print "<!-- $pr->{'forks'} -->\n";
3359                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3360                         }
3361                         print "</td>\n";
3362                 }
3363                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3364                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3365                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3366                                         -class => "list", -title => $pr->{'descr_long'}},
3367                                         esc_html($pr->{'descr'})) . "</td>\n" .
3368                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
3369                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3370                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3371                       "<td class=\"link\">" .
3372                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3373                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3374                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3375                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3376                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3377                       "</td>\n" .
3378                       "</tr>\n";
3379         }
3380         if (defined $extra) {
3381                 print "<tr>\n";
3382                 if ($check_forks) {
3383                         print "<td></td>\n";
3384                 }
3385                 print "<td colspan=\"5\">$extra</td>\n" .
3386                       "</tr>\n";
3387         }
3388         print "</table>\n";
3389 }
3390
3391 sub git_shortlog_body {
3392         # uses global variable $project
3393         my ($commitlist, $from, $to, $refs, $extra) = @_;
3394
3395         $from = 0 unless defined $from;
3396         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3397
3398         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3399         my $alternate = 1;
3400         for (my $i = $from; $i <= $to; $i++) {
3401                 my %co = %{$commitlist->[$i]};
3402                 my $commit = $co{'id'};
3403                 my $ref = format_ref_marker($refs, $commit);
3404                 if ($alternate) {
3405                         print "<tr class=\"dark\">\n";
3406                 } else {
3407                         print "<tr class=\"light\">\n";
3408                 }
3409                 $alternate ^= 1;
3410                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3411                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3412                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3413                       "<td>";
3414                 print format_subject_html($co{'title'}, $co{'title_short'},
3415                                           href(action=>"commit", hash=>$commit), $ref);
3416                 print "</td>\n" .
3417                       "<td class=\"link\">" .
3418                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3419                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3420                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3421                 my $snapshot_links = format_snapshot_links($commit);
3422                 if (defined $snapshot_links) {
3423                         print " | " . $snapshot_links;
3424                 }
3425                 print "</td>\n" .
3426                       "</tr>\n";
3427         }
3428         if (defined $extra) {
3429                 print "<tr>\n" .
3430                       "<td colspan=\"4\">$extra</td>\n" .
3431                       "</tr>\n";
3432         }
3433         print "</table>\n";
3434 }
3435
3436 sub git_history_body {
3437         # Warning: assumes constant type (blob or tree) during history
3438         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3439
3440         $from = 0 unless defined $from;
3441         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3442
3443         print "<table class=\"history\" cellspacing=\"0\">\n";
3444         my $alternate = 1;
3445         for (my $i = $from; $i <= $to; $i++) {
3446                 my %co = %{$commitlist->[$i]};
3447                 if (!%co) {
3448                         next;
3449                 }
3450                 my $commit = $co{'id'};
3451
3452                 my $ref = format_ref_marker($refs, $commit);
3453
3454                 if ($alternate) {
3455                         print "<tr class=\"dark\">\n";
3456                 } else {
3457                         print "<tr class=\"light\">\n";
3458                 }
3459                 $alternate ^= 1;
3460                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3461                       # shortlog uses      chop_str($co{'author_name'}, 10)
3462                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3463                       "<td>";
3464                 # originally git_history used chop_str($co{'title'}, 50)
3465                 print format_subject_html($co{'title'}, $co{'title_short'},
3466                                           href(action=>"commit", hash=>$commit), $ref);
3467                 print "</td>\n" .
3468                       "<td class=\"link\">" .
3469                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3470                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3471
3472                 if ($ftype eq 'blob') {
3473                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3474                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3475                         if (defined $blob_current && defined $blob_parent &&
3476                                         $blob_current ne $blob_parent) {
3477                                 print " | " .
3478                                         $cgi->a({-href => href(action=>"blobdiff",
3479                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3480                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3481                                                                file_name=>$file_name)},
3482                                                 "diff to current");
3483                         }
3484                 }
3485                 print "</td>\n" .
3486                       "</tr>\n";
3487         }
3488         if (defined $extra) {
3489                 print "<tr>\n" .
3490                       "<td colspan=\"4\">$extra</td>\n" .
3491                       "</tr>\n";
3492         }
3493         print "</table>\n";
3494 }
3495
3496 sub git_tags_body {
3497         # uses global variable $project
3498         my ($taglist, $from, $to, $extra) = @_;
3499         $from = 0 unless defined $from;
3500         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3501
3502         print "<table class=\"tags\" cellspacing=\"0\">\n";
3503         my $alternate = 1;
3504         for (my $i = $from; $i <= $to; $i++) {
3505                 my $entry = $taglist->[$i];
3506                 my %tag = %$entry;
3507                 my $comment = $tag{'subject'};
3508                 my $comment_short;
3509                 if (defined $comment) {
3510                         $comment_short = chop_str($comment, 30, 5);
3511                 }
3512                 if ($alternate) {
3513                         print "<tr class=\"dark\">\n";
3514                 } else {
3515                         print "<tr class=\"light\">\n";
3516                 }
3517                 $alternate ^= 1;
3518                 if (defined $tag{'age'}) {
3519                         print "<td><i>$tag{'age'}</i></td>\n";
3520                 } else {
3521                         print "<td></td>\n";
3522                 }
3523                 print "<td>" .
3524                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3525                                -class => "list name"}, esc_html($tag{'name'})) .
3526                       "</td>\n" .
3527                       "<td>";
3528                 if (defined $comment) {
3529                         print format_subject_html($comment, $comment_short,
3530                                                   href(action=>"tag", hash=>$tag{'id'}));
3531                 }
3532                 print "</td>\n" .
3533                       "<td class=\"selflink\">";
3534                 if ($tag{'type'} eq "tag") {
3535                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3536                 } else {
3537                         print "&nbsp;";
3538                 }
3539                 print "</td>\n" .
3540                       "<td class=\"link\">" . " | " .
3541                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3542                 if ($tag{'reftype'} eq "commit") {
3543                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3544                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3545                 } elsif ($tag{'reftype'} eq "blob") {
3546                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3547                 }
3548                 print "</td>\n" .
3549                       "</tr>";
3550         }
3551         if (defined $extra) {
3552                 print "<tr>\n" .
3553                       "<td colspan=\"5\">$extra</td>\n" .
3554                       "</tr>\n";
3555         }
3556         print "</table>\n";
3557 }
3558
3559 sub git_heads_body {
3560         # uses global variable $project
3561         my ($headlist, $head, $from, $to, $extra) = @_;
3562         $from = 0 unless defined $from;
3563         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3564
3565         print "<table class=\"heads\" cellspacing=\"0\">\n";
3566         my $alternate = 1;
3567         for (my $i = $from; $i <= $to; $i++) {
3568                 my $entry = $headlist->[$i];
3569                 my %ref = %$entry;
3570                 my $curr = $ref{'id'} eq $head;
3571                 if ($alternate) {
3572                         print "<tr class=\"dark\">\n";
3573                 } else {
3574                         print "<tr class=\"light\">\n";
3575                 }
3576                 $alternate ^= 1;
3577                 print "<td><i>$ref{'age'}</i></td>\n" .
3578                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3579                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3580                                -class => "list name"},esc_html($ref{'name'})) .
3581                       "</td>\n" .
3582                       "<td class=\"link\">" .
3583                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3584                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3585                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3586                       "</td>\n" .
3587                       "</tr>";
3588         }
3589         if (defined $extra) {
3590                 print "<tr>\n" .
3591                       "<td colspan=\"3\">$extra</td>\n" .
3592                       "</tr>\n";
3593         }
3594         print "</table>\n";
3595 }
3596
3597 sub git_search_grep_body {
3598         my ($commitlist, $from, $to, $extra) = @_;
3599         $from = 0 unless defined $from;
3600         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3601
3602         print "<table class=\"grep\" cellspacing=\"0\">\n";
3603         my $alternate = 1;
3604         for (my $i = $from; $i <= $to; $i++) {
3605                 my %co = %{$commitlist->[$i]};
3606                 if (!%co) {
3607                         next;
3608                 }
3609                 my $commit = $co{'id'};
3610                 if ($alternate) {
3611                         print "<tr class=\"dark\">\n";
3612                 } else {
3613                         print "<tr class=\"light\">\n";
3614                 }
3615                 $alternate ^= 1;
3616                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3617                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3618                       "<td>" .
3619                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3620                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3621                 my $comment = $co{'comment'};
3622                 foreach my $line (@$comment) {
3623                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3624                                 my $lead = esc_html($1) || "";
3625                                 $lead = chop_str($lead, 30, 10);
3626                                 my $match = esc_html($2) || "";
3627                                 my $trail = esc_html($3) || "";
3628                                 $trail = chop_str($trail, 30, 10);
3629                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3630                                 print chop_str($text, 80, 5) . "<br/>\n";
3631                         }
3632                 }
3633                 print "</td>\n" .
3634                       "<td class=\"link\">" .
3635                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3636                       " | " .
3637                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3638                 print "</td>\n" .
3639                       "</tr>\n";
3640         }
3641         if (defined $extra) {
3642                 print "<tr>\n" .
3643                       "<td colspan=\"3\">$extra</td>\n" .
3644                       "</tr>\n";
3645         }
3646         print "</table>\n";
3647 }
3648
3649 ## ======================================================================
3650 ## ======================================================================
3651 ## actions
3652
3653 sub git_project_list {
3654         my $order = $cgi->param('o');
3655         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3656                 die_error(undef, "Unknown order parameter");
3657         }
3658
3659         my @list = git_get_projects_list();
3660         if (!@list) {
3661                 die_error(undef, "No projects found");
3662         }
3663
3664         git_header_html();
3665         if (-f $home_text) {
3666                 print "<div class=\"index_include\">\n";
3667                 open (my $fd, $home_text);
3668                 print <$fd>;
3669                 close $fd;
3670                 print "</div>\n";
3671         }
3672         git_project_list_body(\@list, $order);
3673         git_footer_html();
3674 }
3675
3676 sub git_forks {
3677         my $order = $cgi->param('o');
3678         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3679                 die_error(undef, "Unknown order parameter");
3680         }
3681
3682         my @list = git_get_projects_list($project);
3683         if (!@list) {
3684                 die_error(undef, "No forks found");
3685         }
3686
3687         git_header_html();
3688         git_print_page_nav('','');
3689         git_print_header_div('summary', "$project forks");
3690         git_project_list_body(\@list, $order);
3691         git_footer_html();
3692 }
3693
3694 sub git_project_index {
3695         my @projects = git_get_projects_list($project);
3696
3697         print $cgi->header(
3698                 -type => 'text/plain',
3699                 -charset => 'utf-8',
3700                 -content_disposition => 'inline; filename="index.aux"');
3701
3702         foreach my $pr (@projects) {
3703                 if (!exists $pr->{'owner'}) {
3704                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3705                 }
3706
3707                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3708                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3709                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3710                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3711                 $path  =~ s/ /\+/g;
3712                 $owner =~ s/ /\+/g;
3713
3714                 print "$path $owner\n";
3715         }
3716 }
3717
3718 sub git_summary {
3719         my $descr = git_get_project_description($project) || "none";
3720         my %co = parse_commit("HEAD");
3721         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3722         my $head = $co{'id'};
3723
3724         my $owner = git_get_project_owner($project);
3725
3726         my $refs = git_get_references();
3727         # These get_*_list functions return one more to allow us to see if
3728         # there are more ...
3729         my @taglist  = git_get_tags_list(16);
3730         my @headlist = git_get_heads_list(16);
3731         my @forklist;
3732         my ($check_forks) = gitweb_check_feature('forks');
3733
3734         if ($check_forks) {
3735                 @forklist = git_get_projects_list($project);
3736         }
3737
3738         git_header_html();
3739         git_print_page_nav('summary','', $head);
3740
3741         print "<div class=\"title\">&nbsp;</div>\n";
3742         print "<table cellspacing=\"0\">\n" .
3743               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3744               "<tr><td>owner</td><td>$owner</td></tr>\n";
3745         if (defined $cd{'rfc2822'}) {
3746                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3747         }
3748
3749         # use per project git URL list in $projectroot/$project/cloneurl
3750         # or make project git URL from git base URL and project name
3751         my $url_tag = "URL";
3752         my @url_list = git_get_project_url_list($project);
3753         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3754         foreach my $git_url (@url_list) {
3755                 next unless $git_url;
3756                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3757                 $url_tag = "";
3758         }
3759         print "</table>\n";
3760
3761         if (-s "$projectroot/$project/README.html") {
3762                 if (open my $fd, "$projectroot/$project/README.html") {
3763                         print "<div class=\"title\">readme</div>\n";
3764                         print $_ while (<$fd>);
3765                         close $fd;
3766                 }
3767         }
3768
3769         # we need to request one more than 16 (0..15) to check if
3770         # those 16 are all
3771         my @commitlist = $head ? parse_commits($head, 17) : ();
3772         if (@commitlist) {
3773                 git_print_header_div('shortlog');
3774                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3775                                   $#commitlist <=  15 ? undef :
3776                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3777         }
3778
3779         if (@taglist) {
3780                 git_print_header_div('tags');
3781                 git_tags_body(\@taglist, 0, 15,
3782                               $#taglist <=  15 ? undef :
3783                               $cgi->a({-href => href(action=>"tags")}, "..."));
3784         }
3785
3786         if (@headlist) {
3787                 git_print_header_div('heads');
3788                 git_heads_body(\@headlist, $head, 0, 15,
3789                                $#headlist <= 15 ? undef :
3790                                $cgi->a({-href => href(action=>"heads")}, "..."));
3791         }
3792
3793         if (@forklist) {
3794                 git_print_header_div('forks');
3795                 git_project_list_body(\@forklist, undef, 0, 15,
3796                                       $#forklist <= 15 ? undef :
3797                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3798                                       'noheader');
3799         }
3800
3801         git_footer_html();
3802 }
3803
3804 sub git_tag {
3805         my $head = git_get_head_hash($project);
3806         git_header_html();
3807         git_print_page_nav('','', $head,undef,$head);
3808         my %tag = parse_tag($hash);
3809
3810         if (! %tag) {
3811                 die_error(undef, "Unknown tag object");
3812         }
3813
3814         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3815         print "<div class=\"title_text\">\n" .
3816               "<table cellspacing=\"0\">\n" .
3817               "<tr>\n" .
3818               "<td>object</td>\n" .
3819               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3820                                $tag{'object'}) . "</td>\n" .
3821               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3822                                               $tag{'type'}) . "</td>\n" .
3823               "</tr>\n";
3824         if (defined($tag{'author'})) {
3825                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3826                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3827                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3828                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3829                         "</td></tr>\n";
3830         }
3831         print "</table>\n\n" .
3832               "</div>\n";
3833         print "<div class=\"page_body\">";
3834         my $comment = $tag{'comment'};
3835         foreach my $line (@$comment) {
3836                 chomp $line;
3837                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3838         }
3839         print "</div>\n";
3840         git_footer_html();
3841 }
3842
3843 sub git_blame2 {
3844         my $fd;
3845         my $ftype;
3846
3847         my ($have_blame) = gitweb_check_feature('blame');
3848         if (!$have_blame) {
3849                 die_error('403 Permission denied', "Permission denied");
3850         }
3851         die_error('404 Not Found', "File name not defined") if (!$file_name);
3852         $hash_base ||= git_get_head_hash($project);
3853         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3854         my %co = parse_commit($hash_base)
3855                 or die_error(undef, "Reading commit failed");
3856         if (!defined $hash) {
3857                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3858                         or die_error(undef, "Error looking up file");
3859         }
3860         $ftype = git_get_type($hash);
3861         if ($ftype !~ "blob") {
3862                 die_error('400 Bad Request', "Object is not a blob");
3863         }
3864         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3865               $file_name, $hash_base)
3866                 or die_error(undef, "Open git-blame failed");
3867         git_header_html();
3868         my $formats_nav =
3869                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3870                         "blob") .
3871                 " | " .
3872                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3873                         "history") .
3874                 " | " .
3875                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3876                         "HEAD");
3877         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3878         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3879         git_print_page_path($file_name, $ftype, $hash_base);
3880         my @rev_color = (qw(light2 dark2));
3881         my $num_colors = scalar(@rev_color);
3882         my $current_color = 0;
3883         my $last_rev;
3884         print <<HTML;
3885 <div class="page_body">
3886 <table class="blame">
3887 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3888 HTML
3889         my %metainfo = ();
3890         while (1) {
3891                 $_ = <$fd>;
3892                 last unless defined $_;
3893                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3894                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3895                 if (!exists $metainfo{$full_rev}) {
3896                         $metainfo{$full_rev} = {};
3897                 }
3898                 my $meta = $metainfo{$full_rev};
3899                 while (<$fd>) {
3900                         last if (s/^\t//);
3901                         if (/^(\S+) (.*)$/) {
3902                                 $meta->{$1} = $2;
3903                         }
3904                 }
3905                 my $data = $_;
3906                 chomp $data;
3907                 my $rev = substr($full_rev, 0, 8);
3908                 my $author = $meta->{'author'};
3909                 my %date = parse_date($meta->{'author-time'},
3910                                       $meta->{'author-tz'});
3911                 my $date = $date{'iso-tz'};
3912                 if ($group_size) {
3913                         $current_color = ++$current_color % $num_colors;
3914                 }
3915                 print "<tr class=\"$rev_color[$current_color]\">\n";
3916                 if ($group_size) {
3917                         print "<td class=\"sha1\"";
3918                         print " title=\"". esc_html($author) . ", $date\"";
3919                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3920                         print ">";
3921                         print $cgi->a({-href => href(action=>"commit",
3922                                                      hash=>$full_rev,
3923                                                      file_name=>$file_name)},
3924                                       esc_html($rev));
3925                         print "</td>\n";
3926                 }
3927                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3928                         or die_error(undef, "Open git-rev-parse failed");
3929                 my $parent_commit = <$dd>;
3930                 close $dd;
3931                 chomp($parent_commit);
3932                 my $blamed = href(action => 'blame',
3933                                   file_name => $meta->{'filename'},
3934                                   hash_base => $parent_commit);
3935                 print "<td class=\"linenr\">";
3936                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3937                                 -id => "l$lineno",
3938                                 -class => "linenr" },
3939                               esc_html($lineno));
3940                 print "</td>";
3941                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3942                 print "</tr>\n";
3943         }
3944         print "</table>\n";
3945         print "</div>";
3946         close $fd
3947                 or print "Reading blob failed\n";
3948         git_footer_html();
3949 }
3950
3951 sub git_blame {
3952         my $fd;
3953
3954         my ($have_blame) = gitweb_check_feature('blame');
3955         if (!$have_blame) {
3956                 die_error('403 Permission denied', "Permission denied");
3957         }
3958         die_error('404 Not Found', "File name not defined") if (!$file_name);
3959         $hash_base ||= git_get_head_hash($project);
3960         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3961         my %co = parse_commit($hash_base)
3962                 or die_error(undef, "Reading commit failed");
3963         if (!defined $hash) {
3964                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3965                         or die_error(undef, "Error lookup file");
3966         }
3967         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
3968                 or die_error(undef, "Open git-annotate failed");
3969         git_header_html();
3970         my $formats_nav =
3971                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3972                         "blob") .
3973                 " | " .
3974                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3975                         "history") .
3976                 " | " .
3977                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3978                         "HEAD");
3979         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3980         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3981         git_print_page_path($file_name, 'blob', $hash_base);
3982         print "<div class=\"page_body\">\n";
3983         print <<HTML;
3984 <table class="blame">
3985   <tr>
3986     <th>Commit</th>
3987     <th>Age</th>
3988     <th>Author</th>
3989     <th>Line</th>
3990     <th>Data</th>
3991   </tr>
3992 HTML
3993         my @line_class = (qw(light dark));
3994         my $line_class_len = scalar (@line_class);
3995         my $line_class_num = $#line_class;
3996         while (my $line = <$fd>) {
3997                 my $long_rev;
3998                 my $short_rev;
3999                 my $author;
4000                 my $time;
4001                 my $lineno;
4002                 my $data;
4003                 my $age;
4004                 my $age_str;
4005                 my $age_class;
4006
4007                 chomp $line;
4008                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4009
4010                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4011                         $long_rev = $1;
4012                         $author   = $2;
4013                         $time     = $3;
4014                         $lineno   = $4;
4015                         $data     = $5;
4016                 } else {
4017                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4018                         next;
4019                 }
4020                 $short_rev  = substr ($long_rev, 0, 8);
4021                 $age        = time () - $time;
4022                 $age_str    = age_string ($age);
4023                 $age_str    =~ s/ /&nbsp;/g;
4024                 $age_class  = age_class($age);
4025                 $author     = esc_html ($author);
4026                 $author     =~ s/ /&nbsp;/g;
4027
4028                 $data = untabify($data);
4029                 $data = esc_html ($data);
4030
4031                 print <<HTML;
4032   <tr class="$line_class[$line_class_num]">
4033     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4034     <td class="$age_class">$age_str</td>
4035     <td>$author</td>
4036     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4037     <td class="pre">$data</td>
4038   </tr>
4039 HTML
4040         } # while (my $line = <$fd>)
4041         print "</table>\n\n";
4042         close $fd
4043                 or print "Reading blob failed.\n";
4044         print "</div>";
4045         git_footer_html();
4046 }
4047
4048 sub git_tags {
4049         my $head = git_get_head_hash($project);
4050         git_header_html();
4051         git_print_page_nav('','', $head,undef,$head);
4052         git_print_header_div('summary', $project);
4053
4054         my @tagslist = git_get_tags_list();
4055         if (@tagslist) {
4056                 git_tags_body(\@tagslist);
4057         }
4058         git_footer_html();
4059 }
4060
4061 sub git_heads {
4062         my $head = git_get_head_hash($project);
4063         git_header_html();
4064         git_print_page_nav('','', $head,undef,$head);
4065         git_print_header_div('summary', $project);
4066
4067         my @headslist = git_get_heads_list();
4068         if (@headslist) {
4069                 git_heads_body(\@headslist, $head);
4070         }
4071         git_footer_html();
4072 }
4073
4074 sub git_blob_plain {
4075         my $expires;
4076
4077         if (!defined $hash) {
4078                 if (defined $file_name) {
4079                         my $base = $hash_base || git_get_head_hash($project);
4080                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4081                                 or die_error(undef, "Error lookup file");
4082                 } else {
4083                         die_error(undef, "No file name defined");
4084                 }
4085         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4086                 # blobs defined by non-textual hash id's can be cached
4087                 $expires = "+1d";
4088         }
4089
4090         my $type = shift;
4091         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4092                 or die_error(undef, "Couldn't cat $file_name, $hash");
4093
4094         $type ||= blob_mimetype($fd, $file_name);
4095
4096         # save as filename, even when no $file_name is given
4097         my $save_as = "$hash";
4098         if (defined $file_name) {
4099                 $save_as = $file_name;
4100         } elsif ($type =~ m/^text\//) {
4101                 $save_as .= '.txt';
4102         }
4103
4104         print $cgi->header(
4105                 -type => "$type",
4106                 -expires=>$expires,
4107                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4108         undef $/;
4109         binmode STDOUT, ':raw';
4110         print <$fd>;
4111         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4112         $/ = "\n";
4113         close $fd;
4114 }
4115
4116 sub git_blob {
4117         my $expires;
4118
4119         if (!defined $hash) {
4120                 if (defined $file_name) {
4121                         my $base = $hash_base || git_get_head_hash($project);
4122                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4123                                 or die_error(undef, "Error lookup file");
4124                 } else {
4125                         die_error(undef, "No file name defined");
4126                 }
4127         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4128                 # blobs defined by non-textual hash id's can be cached
4129                 $expires = "+1d";
4130         }
4131
4132         my ($have_blame) = gitweb_check_feature('blame');
4133         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4134                 or die_error(undef, "Couldn't cat $file_name, $hash");
4135         my $mimetype = blob_mimetype($fd, $file_name);
4136         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4137                 close $fd;
4138                 return git_blob_plain($mimetype);
4139         }
4140         # we can have blame only for text/* mimetype
4141         $have_blame &&= ($mimetype =~ m!^text/!);
4142
4143         git_header_html(undef, $expires);
4144         my $formats_nav = '';
4145         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4146                 if (defined $file_name) {
4147                         if ($have_blame) {
4148                                 $formats_nav .=
4149                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4150                                                                hash=>$hash, file_name=>$file_name)},
4151                                                 "blame") .
4152                                         " | ";
4153                         }
4154                         $formats_nav .=
4155                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4156                                                        hash=>$hash, file_name=>$file_name)},
4157                                         "history") .
4158                                 " | " .
4159                                 $cgi->a({-href => href(action=>"blob_plain",
4160                                                        hash=>$hash, file_name=>$file_name)},
4161                                         "raw") .
4162                                 " | " .
4163                                 $cgi->a({-href => href(action=>"blob",
4164                                                        hash_base=>"HEAD", file_name=>$file_name)},
4165                                         "HEAD");
4166                 } else {
4167                         $formats_nav .=
4168                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4169                 }
4170                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4171                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4172         } else {
4173                 print "<div class=\"page_nav\">\n" .
4174                       "<br/><br/></div>\n" .
4175                       "<div class=\"title\">$hash</div>\n";
4176         }
4177         git_print_page_path($file_name, "blob", $hash_base);
4178         print "<div class=\"page_body\">\n";
4179         if ($mimetype =~ m!^text/!) {
4180                 my $nr;
4181                 while (my $line = <$fd>) {
4182                         chomp $line;
4183                         $nr++;
4184                         $line = untabify($line);
4185                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4186                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4187                 }
4188         } elsif ($mimetype =~ m!^image/!) {
4189                 print qq!<img type="$mimetype"!;
4190                 if ($file_name) {
4191                         print qq! alt="$file_name" title="$file_name"!;
4192                 }
4193                 print qq! src="! .
4194                       href(action=>"blob_plain", hash=>$hash,
4195                            hash_base=>$hash_base, file_name=>$file_name) .
4196                       qq!" />\n!;
4197         }
4198         close $fd
4199                 or print "Reading blob failed.\n";
4200         print "</div>";
4201         git_footer_html();
4202 }
4203
4204 sub git_tree {
4205         if (!defined $hash_base) {
4206                 $hash_base = "HEAD";
4207         }
4208         if (!defined $hash) {
4209                 if (defined $file_name) {
4210                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4211                 } else {
4212                         $hash = $hash_base;
4213                 }
4214         }
4215         $/ = "\0";
4216         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4217                 or die_error(undef, "Open git-ls-tree failed");
4218         my @entries = map { chomp; $_ } <$fd>;
4219         close $fd or die_error(undef, "Reading tree failed");
4220         $/ = "\n";
4221
4222         my $refs = git_get_references();
4223         my $ref = format_ref_marker($refs, $hash_base);
4224         git_header_html();
4225         my $basedir = '';
4226         my ($have_blame) = gitweb_check_feature('blame');
4227         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4228                 my @views_nav = ();
4229                 if (defined $file_name) {
4230                         push @views_nav,
4231                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4232                                                        hash=>$hash, file_name=>$file_name)},
4233                                         "history"),
4234                                 $cgi->a({-href => href(action=>"tree",
4235                                                        hash_base=>"HEAD", file_name=>$file_name)},
4236                                         "HEAD"),
4237                 }
4238                 my $snapshot_links = format_snapshot_links($hash);
4239                 if (defined $snapshot_links) {
4240                         # FIXME: Should be available when we have no hash base as well.
4241                         push @views_nav, $snapshot_links;
4242                 }
4243                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4244                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4245         } else {
4246                 undef $hash_base;
4247                 print "<div class=\"page_nav\">\n";
4248                 print "<br/><br/></div>\n";
4249                 print "<div class=\"title\">$hash</div>\n";
4250         }
4251         if (defined $file_name) {
4252                 $basedir = $file_name;
4253                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4254                         $basedir .= '/';
4255                 }
4256         }
4257         git_print_page_path($file_name, 'tree', $hash_base);
4258         print "<div class=\"page_body\">\n";
4259         print "<table cellspacing=\"0\">\n";
4260         my $alternate = 1;
4261         # '..' (top directory) link if possible
4262         if (defined $hash_base &&
4263             defined $file_name && $file_name =~ m![^/]+$!) {
4264                 if ($alternate) {
4265                         print "<tr class=\"dark\">\n";
4266                 } else {
4267                         print "<tr class=\"light\">\n";
4268                 }
4269                 $alternate ^= 1;
4270
4271                 my $up = $file_name;
4272                 $up =~ s!/?[^/]+$!!;
4273                 undef $up unless $up;
4274                 # based on git_print_tree_entry
4275                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4276                 print '<td class="list">';
4277                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4278                                              file_name=>$up)},
4279                               "..");
4280                 print "</td>\n";
4281                 print "<td class=\"link\"></td>\n";
4282
4283                 print "</tr>\n";
4284         }
4285         foreach my $line (@entries) {
4286                 my %t = parse_ls_tree_line($line, -z => 1);
4287
4288                 if ($alternate) {
4289                         print "<tr class=\"dark\">\n";
4290                 } else {
4291                         print "<tr class=\"light\">\n";
4292                 }
4293                 $alternate ^= 1;
4294
4295                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4296
4297                 print "</tr>\n";
4298         }
4299         print "</table>\n" .
4300               "</div>";
4301         git_footer_html();
4302 }
4303
4304 sub git_snapshot {
4305         my @supported_fmts = gitweb_check_feature('snapshot');
4306
4307         my $format = $cgi->param('sf');
4308         unless ($format =~ m/[a-z0-9]+/
4309                 && exists($known_snapshot_formats{$format})
4310                 && grep($_ eq $format, @supported_fmts)) {
4311                 die_error(undef, "Unsupported snapshot format");
4312         }
4313
4314         if (!defined $hash) {
4315                 $hash = git_get_head_hash($project);
4316         }
4317
4318         my $git_command = git_cmd_str();
4319         my $name = $project;
4320         $name =~ s,([^/])/*\.git$,$1,;
4321         $name = basename($name);
4322         my $filename = to_utf8($name);
4323         $name =~ s/\047/\047\\\047\047/g;
4324         my $cmd;
4325         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4326         $cmd = "$git_command archive " .
4327                 "--format=$known_snapshot_formats{$format}{'format'}" .
4328                 "--prefix=\'$name\'/ $hash";
4329         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4330                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4331         }
4332
4333         print $cgi->header(
4334                 -type => $known_snapshot_formats{$format}{'type'},
4335                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4336                 -status => '200 OK');
4337
4338         open my $fd, "-|", $cmd
4339                 or die_error(undef, "Execute git-archive failed");
4340         binmode STDOUT, ':raw';
4341         print <$fd>;
4342         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4343         close $fd;
4344 }
4345
4346 sub git_log {
4347         my $head = git_get_head_hash($project);
4348         if (!defined $hash) {
4349                 $hash = $head;
4350         }
4351         if (!defined $page) {
4352                 $page = 0;
4353         }
4354         my $refs = git_get_references();
4355
4356         my @commitlist = parse_commits($hash, 101, (100 * $page));
4357
4358         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4359
4360         git_header_html();
4361         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4362
4363         if (!@commitlist) {
4364                 my %co = parse_commit($hash);
4365
4366                 git_print_header_div('summary', $project);
4367                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4368         }
4369         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4370         for (my $i = 0; $i <= $to; $i++) {
4371                 my %co = %{$commitlist[$i]};
4372                 next if !%co;
4373                 my $commit = $co{'id'};
4374                 my $ref = format_ref_marker($refs, $commit);
4375                 my %ad = parse_date($co{'author_epoch'});
4376                 git_print_header_div('commit',
4377                                "<span class=\"age\">$co{'age_string'}</span>" .
4378                                esc_html($co{'title'}) . $ref,
4379                                $commit);
4380                 print "<div class=\"title_text\">\n" .
4381                       "<div class=\"log_link\">\n" .
4382                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4383                       " | " .
4384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4385                       " | " .
4386                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4387                       "<br/>\n" .
4388                       "</div>\n" .
4389                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4390                       "</div>\n";
4391
4392                 print "<div class=\"log_body\">\n";
4393                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4394                 print "</div>\n";
4395         }
4396         if ($#commitlist >= 100) {
4397                 print "<div class=\"page_nav\">\n";
4398                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4399                                -accesskey => "n", -title => "Alt-n"}, "next");
4400                 print "</div>\n";
4401         }
4402         git_footer_html();
4403 }
4404
4405 sub git_commit {
4406         $hash ||= $hash_base || "HEAD";
4407         my %co = parse_commit($hash);
4408         if (!%co) {
4409                 die_error(undef, "Unknown commit object");
4410         }
4411         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4412         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4413
4414         my $parent  = $co{'parent'};
4415         my $parents = $co{'parents'}; # listref
4416
4417         # we need to prepare $formats_nav before any parameter munging
4418         my $formats_nav;
4419         if (!defined $parent) {
4420                 # --root commitdiff
4421                 $formats_nav .= '(initial)';
4422         } elsif (@$parents == 1) {
4423                 # single parent commit
4424                 $formats_nav .=
4425                         '(parent: ' .
4426                         $cgi->a({-href => href(action=>"commit",
4427                                                hash=>$parent)},
4428                                 esc_html(substr($parent, 0, 7))) .
4429                         ')';
4430         } else {
4431                 # merge commit
4432                 $formats_nav .=
4433                         '(merge: ' .
4434                         join(' ', map {
4435                                 $cgi->a({-href => href(action=>"commit",
4436                                                        hash=>$_)},
4437                                         esc_html(substr($_, 0, 7)));
4438                         } @$parents ) .
4439                         ')';
4440         }
4441
4442         if (!defined $parent) {
4443                 $parent = "--root";
4444         }
4445         my @difftree;
4446         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4447                 @diff_opts,
4448                 (@$parents <= 1 ? $parent : '-c'),
4449                 $hash, "--"
4450                 or die_error(undef, "Open git-diff-tree failed");
4451         @difftree = map { chomp; $_ } <$fd>;
4452         close $fd or die_error(undef, "Reading git-diff-tree failed");
4453
4454         # non-textual hash id's can be cached
4455         my $expires;
4456         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4457                 $expires = "+1d";
4458         }
4459         my $refs = git_get_references();
4460         my $ref = format_ref_marker($refs, $co{'id'});
4461
4462         git_header_html(undef, $expires);
4463         git_print_page_nav('commit', '',
4464                            $hash, $co{'tree'}, $hash,
4465                            $formats_nav);
4466
4467         if (defined $co{'parent'}) {
4468                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4469         } else {
4470                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4471         }
4472         print "<div class=\"title_text\">\n" .
4473               "<table cellspacing=\"0\">\n";
4474         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4475               "<tr>" .
4476               "<td></td><td> $ad{'rfc2822'}";
4477         if ($ad{'hour_local'} < 6) {
4478                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4479                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4480         } else {
4481                 printf(" (%02d:%02d %s)",
4482                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4483         }
4484         print "</td>" .
4485               "</tr>\n";
4486         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4487         print "<tr><td></td><td> $cd{'rfc2822'}" .
4488               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4489               "</td></tr>\n";
4490         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4491         print "<tr>" .
4492               "<td>tree</td>" .
4493               "<td class=\"sha1\">" .
4494               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4495                        class => "list"}, $co{'tree'}) .
4496               "</td>" .
4497               "<td class=\"link\">" .
4498               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4499                       "tree");
4500         my $snapshot_links = format_snapshot_links($hash);
4501         if (defined $snapshot_links) {
4502                 print " | " . $snapshot_links;
4503         }
4504         print "</td>" .
4505               "</tr>\n";
4506
4507         foreach my $par (@$parents) {
4508                 print "<tr>" .
4509                       "<td>parent</td>" .
4510                       "<td class=\"sha1\">" .
4511                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4512                                class => "list"}, $par) .
4513                       "</td>" .
4514                       "<td class=\"link\">" .
4515                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4516                       " | " .
4517                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4518                       "</td>" .
4519                       "</tr>\n";
4520         }
4521         print "</table>".
4522               "</div>\n";
4523
4524         print "<div class=\"page_body\">\n";
4525         git_print_log($co{'comment'});
4526         print "</div>\n";
4527
4528         git_difftree_body(\@difftree, $hash, @$parents);
4529
4530         git_footer_html();
4531 }
4532
4533 sub git_object {
4534         # object is defined by:
4535         # - hash or hash_base alone
4536         # - hash_base and file_name
4537         my $type;
4538
4539         # - hash or hash_base alone
4540         if ($hash || ($hash_base && !defined $file_name)) {
4541                 my $object_id = $hash || $hash_base;
4542
4543                 my $git_command = git_cmd_str();
4544                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4545                         or die_error('404 Not Found', "Object does not exist");
4546                 $type = <$fd>;
4547                 chomp $type;
4548                 close $fd
4549                         or die_error('404 Not Found', "Object does not exist");
4550
4551         # - hash_base and file_name
4552         } elsif ($hash_base && defined $file_name) {
4553                 $file_name =~ s,/+$,,;
4554
4555                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4556                         or die_error('404 Not Found', "Base object does not exist");
4557
4558                 # here errors should not hapen
4559                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4560                         or die_error(undef, "Open git-ls-tree failed");
4561                 my $line = <$fd>;
4562                 close $fd;
4563
4564                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4565                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4566                         die_error('404 Not Found', "File or directory for given base does not exist");
4567                 }
4568                 $type = $2;
4569                 $hash = $3;
4570         } else {
4571                 die_error('404 Not Found', "Not enough information to find object");
4572         }
4573
4574         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4575                                           hash=>$hash, hash_base=>$hash_base,
4576                                           file_name=>$file_name),
4577                              -status => '302 Found');
4578 }
4579
4580 sub git_blobdiff {
4581         my $format = shift || 'html';
4582
4583         my $fd;
4584         my @difftree;
4585         my %diffinfo;
4586         my $expires;
4587
4588         # preparing $fd and %diffinfo for git_patchset_body
4589         # new style URI
4590         if (defined $hash_base && defined $hash_parent_base) {
4591                 if (defined $file_name) {
4592                         # read raw output
4593                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4594                                 $hash_parent_base, $hash_base,
4595                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4596                                 or die_error(undef, "Open git-diff-tree failed");
4597                         @difftree = map { chomp; $_ } <$fd>;
4598                         close $fd
4599                                 or die_error(undef, "Reading git-diff-tree failed");
4600                         @difftree
4601                                 or die_error('404 Not Found', "Blob diff not found");
4602
4603                 } elsif (defined $hash &&
4604                          $hash =~ /[0-9a-fA-F]{40}/) {
4605                         # try to find filename from $hash
4606
4607                         # read filtered raw output
4608                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4609                                 $hash_parent_base, $hash_base, "--"
4610                                 or die_error(undef, "Open git-diff-tree failed");
4611                         @difftree =
4612                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4613                                 # $hash == to_id
4614                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4615                                 map { chomp; $_ } <$fd>;
4616                         close $fd
4617                                 or die_error(undef, "Reading git-diff-tree failed");
4618                         @difftree
4619                                 or die_error('404 Not Found', "Blob diff not found");
4620
4621                 } else {
4622                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4623                 }
4624
4625                 if (@difftree > 1) {
4626                         die_error('404 Not Found', "Ambiguous blob diff specification");
4627                 }
4628
4629                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4630                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4631                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4632
4633                 $hash_parent ||= $diffinfo{'from_id'};
4634                 $hash        ||= $diffinfo{'to_id'};
4635
4636                 # non-textual hash id's can be cached
4637                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4638                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4639                         $expires = '+1d';
4640                 }
4641
4642                 # open patch output
4643                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4644                         '-p', ($format eq 'html' ? "--full-index" : ()),
4645                         $hash_parent_base, $hash_base,
4646                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4647                         or die_error(undef, "Open git-diff-tree failed");
4648         }
4649
4650         # old/legacy style URI
4651         if (!%diffinfo && # if new style URI failed
4652             defined $hash && defined $hash_parent) {
4653                 # fake git-diff-tree raw output
4654                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4655                 $diffinfo{'from_id'} = $hash_parent;
4656                 $diffinfo{'to_id'}   = $hash;
4657                 if (defined $file_name) {
4658                         if (defined $file_parent) {
4659                                 $diffinfo{'status'} = '2';
4660                                 $diffinfo{'from_file'} = $file_parent;
4661                                 $diffinfo{'to_file'}   = $file_name;
4662                         } else { # assume not renamed
4663                                 $diffinfo{'status'} = '1';
4664                                 $diffinfo{'from_file'} = $file_name;
4665                                 $diffinfo{'to_file'}   = $file_name;
4666                         }
4667                 } else { # no filename given
4668                         $diffinfo{'status'} = '2';
4669                         $diffinfo{'from_file'} = $hash_parent;
4670                         $diffinfo{'to_file'}   = $hash;
4671                 }
4672
4673                 # non-textual hash id's can be cached
4674                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4675                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4676                         $expires = '+1d';
4677                 }
4678
4679                 # open patch output
4680                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4681                         '-p', ($format eq 'html' ? "--full-index" : ()),
4682                         $hash_parent, $hash, "--"
4683                         or die_error(undef, "Open git-diff failed");
4684         } else  {
4685                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4686                         unless %diffinfo;
4687         }
4688
4689         # header
4690         if ($format eq 'html') {
4691                 my $formats_nav =
4692                         $cgi->a({-href => href(action=>"blobdiff_plain",
4693                                                hash=>$hash, hash_parent=>$hash_parent,
4694                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4695                                                file_name=>$file_name, file_parent=>$file_parent)},
4696                                 "raw");
4697                 git_header_html(undef, $expires);
4698                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4699                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4700                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4701                 } else {
4702                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4703                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4704                 }
4705                 if (defined $file_name) {
4706                         git_print_page_path($file_name, "blob", $hash_base);
4707                 } else {
4708                         print "<div class=\"page_path\"></div>\n";
4709                 }
4710
4711         } elsif ($format eq 'plain') {
4712                 print $cgi->header(
4713                         -type => 'text/plain',
4714                         -charset => 'utf-8',
4715                         -expires => $expires,
4716                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4717
4718                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4719
4720         } else {
4721                 die_error(undef, "Unknown blobdiff format");
4722         }
4723
4724         # patch
4725         if ($format eq 'html') {
4726                 print "<div class=\"page_body\">\n";
4727
4728                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4729                 close $fd;
4730
4731                 print "</div>\n"; # class="page_body"
4732                 git_footer_html();
4733
4734         } else {
4735                 while (my $line = <$fd>) {
4736                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4737                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4738
4739                         print $line;
4740
4741                         last if $line =~ m!^\+\+\+!;
4742                 }
4743                 local $/ = undef;
4744                 print <$fd>;
4745                 close $fd;
4746         }
4747 }
4748
4749 sub git_blobdiff_plain {
4750         git_blobdiff('plain');
4751 }
4752
4753 sub git_commitdiff {
4754         my $format = shift || 'html';
4755         $hash ||= $hash_base || "HEAD";
4756         my %co = parse_commit($hash);
4757         if (!%co) {
4758                 die_error(undef, "Unknown commit object");
4759         }
4760
4761         # choose format for commitdiff for merge
4762         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4763                 $hash_parent = '--cc';
4764         }
4765         # we need to prepare $formats_nav before almost any parameter munging
4766         my $formats_nav;
4767         if ($format eq 'html') {
4768                 $formats_nav =
4769                         $cgi->a({-href => href(action=>"commitdiff_plain",
4770                                                hash=>$hash, hash_parent=>$hash_parent)},
4771                                 "raw");
4772
4773                 if (defined $hash_parent &&
4774                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4775                         # commitdiff with two commits given
4776                         my $hash_parent_short = $hash_parent;
4777                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4778                                 $hash_parent_short = substr($hash_parent, 0, 7);
4779                         }
4780                         $formats_nav .=
4781                                 ' (from';
4782                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4783                                 if ($co{'parents'}[$i] eq $hash_parent) {
4784                                         $formats_nav .= ' parent ' . ($i+1);
4785                                         last;
4786                                 }
4787                         }
4788                         $formats_nav .= ': ' .
4789                                 $cgi->a({-href => href(action=>"commitdiff",
4790                                                        hash=>$hash_parent)},
4791                                         esc_html($hash_parent_short)) .
4792                                 ')';
4793                 } elsif (!$co{'parent'}) {
4794                         # --root commitdiff
4795                         $formats_nav .= ' (initial)';
4796                 } elsif (scalar @{$co{'parents'}} == 1) {
4797                         # single parent commit
4798                         $formats_nav .=
4799                                 ' (parent: ' .
4800                                 $cgi->a({-href => href(action=>"commitdiff",
4801                                                        hash=>$co{'parent'})},
4802                                         esc_html(substr($co{'parent'}, 0, 7))) .
4803                                 ')';
4804                 } else {
4805                         # merge commit
4806                         if ($hash_parent eq '--cc') {
4807                                 $formats_nav .= ' | ' .
4808                                         $cgi->a({-href => href(action=>"commitdiff",
4809                                                                hash=>$hash, hash_parent=>'-c')},
4810                                                 'combined');
4811                         } else { # $hash_parent eq '-c'
4812                                 $formats_nav .= ' | ' .
4813                                         $cgi->a({-href => href(action=>"commitdiff",
4814                                                                hash=>$hash, hash_parent=>'--cc')},
4815                                                 'compact');
4816                         }
4817                         $formats_nav .=
4818                                 ' (merge: ' .
4819                                 join(' ', map {
4820                                         $cgi->a({-href => href(action=>"commitdiff",
4821                                                                hash=>$_)},
4822                                                 esc_html(substr($_, 0, 7)));
4823                                 } @{$co{'parents'}} ) .
4824                                 ')';
4825                 }
4826         }
4827
4828         my $hash_parent_param = $hash_parent;
4829         if (!defined $hash_parent_param) {
4830                 # --cc for multiple parents, --root for parentless
4831                 $hash_parent_param =
4832                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4833         }
4834
4835         # read commitdiff
4836         my $fd;
4837         my @difftree;
4838         if ($format eq 'html') {
4839                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4840                         "--no-commit-id", "--patch-with-raw", "--full-index",
4841                         $hash_parent_param, $hash, "--"
4842                         or die_error(undef, "Open git-diff-tree failed");
4843
4844                 while (my $line = <$fd>) {
4845                         chomp $line;
4846                         # empty line ends raw part of diff-tree output
4847                         last unless $line;
4848                         push @difftree, scalar parse_difftree_raw_line($line);
4849                 }
4850
4851         } elsif ($format eq 'plain') {
4852                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4853                         '-p', $hash_parent_param, $hash, "--"
4854                         or die_error(undef, "Open git-diff-tree failed");
4855
4856         } else {
4857                 die_error(undef, "Unknown commitdiff format");
4858         }
4859
4860         # non-textual hash id's can be cached
4861         my $expires;
4862         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4863                 $expires = "+1d";
4864         }
4865
4866         # write commit message
4867         if ($format eq 'html') {
4868                 my $refs = git_get_references();
4869                 my $ref = format_ref_marker($refs, $co{'id'});
4870
4871                 git_header_html(undef, $expires);
4872                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4873                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4874                 git_print_authorship(\%co);
4875                 print "<div class=\"page_body\">\n";
4876                 if (@{$co{'comment'}} > 1) {
4877                         print "<div class=\"log\">\n";
4878                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4879                         print "</div>\n"; # class="log"
4880                 }
4881
4882         } elsif ($format eq 'plain') {
4883                 my $refs = git_get_references("tags");
4884                 my $tagname = git_get_rev_name_tags($hash);
4885                 my $filename = basename($project) . "-$hash.patch";
4886
4887                 print $cgi->header(
4888                         -type => 'text/plain',
4889                         -charset => 'utf-8',
4890                         -expires => $expires,
4891                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4892                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4893                 print <<TEXT;
4894 From: $co{'author'}
4895 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4896 Subject: $co{'title'}
4897 TEXT
4898                 print "X-Git-Tag: $tagname\n" if $tagname;
4899                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4900
4901                 foreach my $line (@{$co{'comment'}}) {
4902                         print "$line\n";
4903                 }
4904                 print "---\n\n";
4905         }
4906
4907         # write patch
4908         if ($format eq 'html') {
4909                 my $use_parents = !defined $hash_parent ||
4910                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4911                 git_difftree_body(\@difftree, $hash,
4912                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4913                 print "<br/>\n";
4914
4915                 git_patchset_body($fd, \@difftree, $hash,
4916                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4917                 close $fd;
4918                 print "</div>\n"; # class="page_body"
4919                 git_footer_html();
4920
4921         } elsif ($format eq 'plain') {
4922                 local $/ = undef;
4923                 print <$fd>;
4924                 close $fd
4925                         or print "Reading git-diff-tree failed\n";
4926         }
4927 }
4928
4929 sub git_commitdiff_plain {
4930         git_commitdiff('plain');
4931 }
4932
4933 sub git_history {
4934         if (!defined $hash_base) {
4935                 $hash_base = git_get_head_hash($project);
4936         }
4937         if (!defined $page) {
4938                 $page = 0;
4939         }
4940         my $ftype;
4941         my %co = parse_commit($hash_base);
4942         if (!%co) {
4943                 die_error(undef, "Unknown commit object");
4944         }
4945
4946         my $refs = git_get_references();
4947         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4948
4949         if (!defined $hash && defined $file_name) {
4950                 $hash = git_get_hash_by_path($hash_base, $file_name);
4951         }
4952         if (defined $hash) {
4953                 $ftype = git_get_type($hash);
4954         }
4955
4956         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
4957
4958         my $paging_nav = '';
4959         if ($page > 0) {
4960                 $paging_nav .=
4961                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4962                                                file_name=>$file_name)},
4963                                 "first");
4964                 $paging_nav .= " &sdot; " .
4965                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4966                                                file_name=>$file_name, page=>$page-1),
4967                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4968         } else {
4969                 $paging_nav .= "first";
4970                 $paging_nav .= " &sdot; prev";
4971         }
4972         if ($#commitlist >= 100) {
4973                 $paging_nav .= " &sdot; " .
4974                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4975                                                file_name=>$file_name, page=>$page+1),
4976                                  -accesskey => "n", -title => "Alt-n"}, "next");
4977         } else {
4978                 $paging_nav .= " &sdot; next";
4979         }
4980         my $next_link = '';
4981         if ($#commitlist >= 100) {
4982                 $next_link =
4983                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4984                                                file_name=>$file_name, page=>$page+1),
4985                                  -accesskey => "n", -title => "Alt-n"}, "next");
4986         }
4987
4988         git_header_html();
4989         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
4990         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4991         git_print_page_path($file_name, $ftype, $hash_base);
4992
4993         git_history_body(\@commitlist, 0, 99,
4994                          $refs, $hash_base, $ftype, $next_link);
4995
4996         git_footer_html();
4997 }
4998
4999 sub git_search {
5000         my ($have_search) = gitweb_check_feature('search');
5001         if (!$have_search) {
5002                 die_error('403 Permission denied', "Permission denied");
5003         }
5004         if (!defined $searchtext) {
5005                 die_error(undef, "Text field empty");
5006         }
5007         if (!defined $hash) {
5008                 $hash = git_get_head_hash($project);
5009         }
5010         my %co = parse_commit($hash);
5011         if (!%co) {
5012                 die_error(undef, "Unknown commit object");
5013         }
5014         if (!defined $page) {
5015                 $page = 0;
5016         }
5017
5018         $searchtype ||= 'commit';
5019         if ($searchtype eq 'pickaxe') {
5020                 # pickaxe may take all resources of your box and run for several minutes
5021                 # with every query - so decide by yourself how public you make this feature
5022                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5023                 if (!$have_pickaxe) {
5024                         die_error('403 Permission denied', "Permission denied");
5025                 }
5026         }
5027         if ($searchtype eq 'grep') {
5028                 my ($have_grep) = gitweb_check_feature('grep');
5029                 if (!$have_grep) {
5030                         die_error('403 Permission denied', "Permission denied");
5031                 }
5032         }
5033
5034         git_header_html();
5035
5036         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5037                 my $greptype;
5038                 if ($searchtype eq 'commit') {
5039                         $greptype = "--grep=";
5040                 } elsif ($searchtype eq 'author') {
5041                         $greptype = "--author=";
5042                 } elsif ($searchtype eq 'committer') {
5043                         $greptype = "--committer=";
5044                 }
5045                 $greptype .= $search_regexp;
5046                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5047
5048                 my $paging_nav = '';
5049                 if ($page > 0) {
5050                         $paging_nav .=
5051                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5052                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5053                                         "first");
5054                         $paging_nav .= " &sdot; " .
5055                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5056                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5057                                                        page=>$page-1),
5058                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5059                 } else {
5060                         $paging_nav .= "first";
5061                         $paging_nav .= " &sdot; prev";
5062                 }
5063                 if ($#commitlist >= 100) {
5064                         $paging_nav .= " &sdot; " .
5065                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5066                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5067                                                        page=>$page+1),
5068                                          -accesskey => "n", -title => "Alt-n"}, "next");
5069                 } else {
5070                         $paging_nav .= " &sdot; next";
5071                 }
5072                 my $next_link = '';
5073                 if ($#commitlist >= 100) {
5074                         $next_link =
5075                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5076                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5077                                                        page=>$page+1),
5078                                          -accesskey => "n", -title => "Alt-n"}, "next");
5079                 }
5080
5081                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5082                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5083                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5084         }
5085
5086         if ($searchtype eq 'pickaxe') {
5087                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5088                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5089
5090                 print "<table cellspacing=\"0\">\n";
5091                 my $alternate = 1;
5092                 $/ = "\n";
5093                 my $git_command = git_cmd_str();
5094                 my $searchqtext = $searchtext;
5095                 $searchqtext =~ s/'/'\\''/;
5096                 open my $fd, "-|", "$git_command rev-list $hash | " .
5097                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5098                 undef %co;
5099                 my @files;
5100                 while (my $line = <$fd>) {
5101                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5102                                 my %set;
5103                                 $set{'file'} = $6;
5104                                 $set{'from_id'} = $3;
5105                                 $set{'to_id'} = $4;
5106                                 $set{'id'} = $set{'to_id'};
5107                                 if ($set{'id'} =~ m/0{40}/) {
5108                                         $set{'id'} = $set{'from_id'};
5109                                 }
5110                                 if ($set{'id'} =~ m/0{40}/) {
5111                                         next;
5112                                 }
5113                                 push @files, \%set;
5114                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5115                                 if (%co) {
5116                                         if ($alternate) {
5117                                                 print "<tr class=\"dark\">\n";
5118                                         } else {
5119                                                 print "<tr class=\"light\">\n";
5120                                         }
5121                                         $alternate ^= 1;
5122                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5123                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5124                                               "<td>" .
5125                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5126                                                       -class => "list subject"},
5127                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5128                                         while (my $setref = shift @files) {
5129                                                 my %set = %$setref;
5130                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5131                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5132                                                               -class => "list"},
5133                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5134                                                       "<br/>\n";
5135                                         }
5136                                         print "</td>\n" .
5137                                               "<td class=\"link\">" .
5138                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5139                                               " | " .
5140                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5141                                         print "</td>\n" .
5142                                               "</tr>\n";
5143                                 }
5144                                 %co = parse_commit($1);
5145                         }
5146                 }
5147                 close $fd;
5148
5149                 print "</table>\n";
5150         }
5151
5152         if ($searchtype eq 'grep') {
5153                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5154                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5155
5156                 print "<table cellspacing=\"0\">\n";
5157                 my $alternate = 1;
5158                 my $matches = 0;
5159                 $/ = "\n";
5160                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5161                 my $lastfile = '';
5162                 while (my $line = <$fd>) {
5163                         chomp $line;
5164                         my ($file, $lno, $ltext, $binary);
5165                         last if ($matches++ > 1000);
5166                         if ($line =~ /^Binary file (.+) matches$/) {
5167                                 $file = $1;
5168                                 $binary = 1;
5169                         } else {
5170                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5171                         }
5172                         if ($file ne $lastfile) {
5173                                 $lastfile and print "</td></tr>\n";
5174                                 if ($alternate++) {
5175                                         print "<tr class=\"dark\">\n";
5176                                 } else {
5177                                         print "<tr class=\"light\">\n";
5178                                 }
5179                                 print "<td class=\"list\">".
5180                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5181                                                                file_name=>"$file"),
5182                                                 -class => "list"}, esc_path($file));
5183                                 print "</td><td>\n";
5184                                 $lastfile = $file;
5185                         }
5186                         if ($binary) {
5187                                 print "<div class=\"binary\">Binary file</div>\n";
5188                         } else {
5189                                 $ltext = untabify($ltext);
5190                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5191                                         $ltext = esc_html($1, -nbsp=>1);
5192                                         $ltext .= '<span class="match">';
5193                                         $ltext .= esc_html($2, -nbsp=>1);
5194                                         $ltext .= '</span>';
5195                                         $ltext .= esc_html($3, -nbsp=>1);
5196                                 } else {
5197                                         $ltext = esc_html($ltext, -nbsp=>1);
5198                                 }
5199                                 print "<div class=\"pre\">" .
5200                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5201                                                                file_name=>"$file").'#l'.$lno,
5202                                                 -class => "linenr"}, sprintf('%4i', $lno))
5203                                         . ' ' .  $ltext . "</div>\n";
5204                         }
5205                 }
5206                 if ($lastfile) {
5207                         print "</td></tr>\n";
5208                         if ($matches > 1000) {
5209                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5210                         }
5211                 } else {
5212                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5213                 }
5214                 close $fd;
5215
5216                 print "</table>\n";
5217         }
5218         git_footer_html();
5219 }
5220
5221 sub git_search_help {
5222         git_header_html();
5223         git_print_page_nav('','', $hash,$hash,$hash);
5224         print <<EOT;
5225 <dl>
5226 <dt><b>commit</b></dt>
5227 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5228 EOT
5229         my ($have_grep) = gitweb_check_feature('grep');
5230         if ($have_grep) {
5231                 print <<EOT;
5232 <dt><b>grep</b></dt>
5233 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5234     a different one) are searched for the given
5235 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5236 (POSIX extended) and the matches are listed. On large
5237 trees, this search can take a while and put some strain on the server, so please use it with
5238 some consideration.</dd>
5239 EOT
5240         }
5241         print <<EOT;
5242 <dt><b>author</b></dt>
5243 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5244 <dt><b>committer</b></dt>
5245 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5246 EOT
5247         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5248         if ($have_pickaxe) {
5249                 print <<EOT;
5250 <dt><b>pickaxe</b></dt>
5251 <dd>All commits that caused the string to appear or disappear from any file (changes that
5252 added, removed or "modified" the string) will be listed. This search can take a while and
5253 takes a lot of strain on the server, so please use it wisely.</dd>
5254 EOT
5255         }
5256         print "</dl>\n";
5257         git_footer_html();
5258 }
5259
5260 sub git_shortlog {
5261         my $head = git_get_head_hash($project);
5262         if (!defined $hash) {
5263                 $hash = $head;
5264         }
5265         if (!defined $page) {
5266                 $page = 0;
5267         }
5268         my $refs = git_get_references();
5269
5270         my @commitlist = parse_commits($hash, 101, (100 * $page));
5271
5272         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5273         my $next_link = '';
5274         if ($#commitlist >= 100) {
5275                 $next_link =
5276                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5277                                  -accesskey => "n", -title => "Alt-n"}, "next");
5278         }
5279
5280         git_header_html();
5281         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5282         git_print_header_div('summary', $project);
5283
5284         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5285
5286         git_footer_html();
5287 }
5288
5289 ## ......................................................................
5290 ## feeds (RSS, Atom; OPML)
5291
5292 sub git_feed {
5293         my $format = shift || 'atom';
5294         my ($have_blame) = gitweb_check_feature('blame');
5295
5296         # Atom: http://www.atomenabled.org/developers/syndication/
5297         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5298         if ($format ne 'rss' && $format ne 'atom') {
5299                 die_error(undef, "Unknown web feed format");
5300         }
5301
5302         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5303         my $head = $hash || 'HEAD';
5304         my @commitlist = parse_commits($head, 150);
5305
5306         my %latest_commit;
5307         my %latest_date;
5308         my $content_type = "application/$format+xml";
5309         if (defined $cgi->http('HTTP_ACCEPT') &&
5310                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5311                 # browser (feed reader) prefers text/xml
5312                 $content_type = 'text/xml';
5313         }
5314         if (defined($commitlist[0])) {
5315                 %latest_commit = %{$commitlist[0]};
5316                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5317                 print $cgi->header(
5318                         -type => $content_type,
5319                         -charset => 'utf-8',
5320                         -last_modified => $latest_date{'rfc2822'});
5321         } else {
5322                 print $cgi->header(
5323                         -type => $content_type,
5324                         -charset => 'utf-8');
5325         }
5326
5327         # Optimization: skip generating the body if client asks only
5328         # for Last-Modified date.
5329         return if ($cgi->request_method() eq 'HEAD');
5330
5331         # header variables
5332         my $title = "$site_name - $project/$action";
5333         my $feed_type = 'log';
5334         if (defined $hash) {
5335                 $title .= " - '$hash'";
5336                 $feed_type = 'branch log';
5337                 if (defined $file_name) {
5338                         $title .= " :: $file_name";
5339                         $feed_type = 'history';
5340                 }
5341         } elsif (defined $file_name) {
5342                 $title .= " - $file_name";
5343                 $feed_type = 'history';
5344         }
5345         $title .= " $feed_type";
5346         my $descr = git_get_project_description($project);
5347         if (defined $descr) {
5348                 $descr = esc_html($descr);
5349         } else {
5350                 $descr = "$project " .
5351                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5352                          " feed";
5353         }
5354         my $owner = git_get_project_owner($project);
5355         $owner = esc_html($owner);
5356
5357         #header
5358         my $alt_url;
5359         if (defined $file_name) {
5360                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5361         } elsif (defined $hash) {
5362                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5363         } else {
5364                 $alt_url = href(-full=>1, action=>"summary");
5365         }
5366         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5367         if ($format eq 'rss') {
5368                 print <<XML;
5369 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5370 <channel>
5371 XML
5372                 print "<title>$title</title>\n" .
5373                       "<link>$alt_url</link>\n" .
5374                       "<description>$descr</description>\n" .
5375                       "<language>en</language>\n";
5376         } elsif ($format eq 'atom') {
5377                 print <<XML;
5378 <feed xmlns="http://www.w3.org/2005/Atom">
5379 XML
5380                 print "<title>$title</title>\n" .
5381                       "<subtitle>$descr</subtitle>\n" .
5382                       '<link rel="alternate" type="text/html" href="' .
5383                       $alt_url . '" />' . "\n" .
5384                       '<link rel="self" type="' . $content_type . '" href="' .
5385                       $cgi->self_url() . '" />' . "\n" .
5386                       "<id>" . href(-full=>1) . "</id>\n" .
5387                       # use project owner for feed author
5388                       "<author><name>$owner</name></author>\n";
5389                 if (defined $favicon) {
5390                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5391                 }
5392                 if (defined $logo_url) {
5393                         # not twice as wide as tall: 72 x 27 pixels
5394                         print "<logo>" . esc_url($logo) . "</logo>\n";
5395                 }
5396                 if (! %latest_date) {
5397                         # dummy date to keep the feed valid until commits trickle in:
5398                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5399                 } else {
5400                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5401                 }
5402         }
5403
5404         # contents
5405         for (my $i = 0; $i <= $#commitlist; $i++) {
5406                 my %co = %{$commitlist[$i]};
5407                 my $commit = $co{'id'};
5408                 # we read 150, we always show 30 and the ones more recent than 48 hours
5409                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5410                         last;
5411                 }
5412                 my %cd = parse_date($co{'author_epoch'});
5413
5414                 # get list of changed files
5415                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5416                         $co{'parent'} || "--root",
5417                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5418                         or next;
5419                 my @difftree = map { chomp; $_ } <$fd>;
5420                 close $fd
5421                         or next;
5422
5423                 # print element (entry, item)
5424                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5425                 if ($format eq 'rss') {
5426                         print "<item>\n" .
5427                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5428                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5429                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5430                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5431                               "<link>$co_url</link>\n" .
5432                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5433                               "<content:encoded>" .
5434                               "<![CDATA[\n";
5435                 } elsif ($format eq 'atom') {
5436                         print "<entry>\n" .
5437                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5438                               "<updated>$cd{'iso-8601'}</updated>\n" .
5439                               "<author>\n" .
5440                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5441                         if ($co{'author_email'}) {
5442                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5443                         }
5444                         print "</author>\n" .
5445                               # use committer for contributor
5446                               "<contributor>\n" .
5447                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5448                         if ($co{'committer_email'}) {
5449                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5450                         }
5451                         print "</contributor>\n" .
5452                               "<published>$cd{'iso-8601'}</published>\n" .
5453                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5454                               "<id>$co_url</id>\n" .
5455                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5456                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5457                 }
5458                 my $comment = $co{'comment'};
5459                 print "<pre>\n";
5460                 foreach my $line (@$comment) {
5461                         $line = esc_html($line);
5462                         print "$line\n";
5463                 }
5464                 print "</pre><ul>\n";
5465                 foreach my $difftree_line (@difftree) {
5466                         my %difftree = parse_difftree_raw_line($difftree_line);
5467                         next if !$difftree{'from_id'};
5468
5469                         my $file = $difftree{'file'} || $difftree{'to_file'};
5470
5471                         print "<li>" .
5472                               "[" .
5473                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5474                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5475                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5476                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5477                                       -title => "diff"}, 'D');
5478                         if ($have_blame) {
5479                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5480                                                              file_name=>$file, hash_base=>$commit),
5481                                               -title => "blame"}, 'B');
5482                         }
5483                         # if this is not a feed of a file history
5484                         if (!defined $file_name || $file_name ne $file) {
5485                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5486                                                              file_name=>$file, hash=>$commit),
5487                                               -title => "history"}, 'H');
5488                         }
5489                         $file = esc_path($file);
5490                         print "] ".
5491                               "$file</li>\n";
5492                 }
5493                 if ($format eq 'rss') {
5494                         print "</ul>]]>\n" .
5495                               "</content:encoded>\n" .
5496                               "</item>\n";
5497                 } elsif ($format eq 'atom') {
5498                         print "</ul>\n</div>\n" .
5499                               "</content>\n" .
5500                               "</entry>\n";
5501                 }
5502         }
5503
5504         # end of feed
5505         if ($format eq 'rss') {
5506                 print "</channel>\n</rss>\n";
5507         }       elsif ($format eq 'atom') {
5508                 print "</feed>\n";
5509         }
5510 }
5511
5512 sub git_rss {
5513         git_feed('rss');
5514 }
5515
5516 sub git_atom {
5517         git_feed('atom');
5518 }
5519
5520 sub git_opml {
5521         my @list = git_get_projects_list();
5522
5523         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5524         print <<XML;
5525 <?xml version="1.0" encoding="utf-8"?>
5526 <opml version="1.0">
5527 <head>
5528   <title>$site_name OPML Export</title>
5529 </head>
5530 <body>
5531 <outline text="git RSS feeds">
5532 XML
5533
5534         foreach my $pr (@list) {
5535                 my %proj = %$pr;
5536                 my $head = git_get_head_hash($proj{'path'});
5537                 if (!defined $head) {
5538                         next;
5539                 }
5540                 $git_dir = "$projectroot/$proj{'path'}";
5541                 my %co = parse_commit($head);
5542                 if (!%co) {
5543                         next;
5544                 }
5545
5546                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5547                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5548                 my $html = "$my_url?p=$proj{'path'};a=summary";
5549                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5550         }
5551         print <<XML;
5552 </outline>
5553 </body>
5554 </opml>
5555 XML
5556 }