Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64
  65 # URI of GIT logo (72x27 size)
  66 our $logo = "++GITWEB_LOGO++";
  67 # URI of GIT favicon, assumed to be image/png type
  68 our $favicon = "++GITWEB_FAVICON++";
  69
  70 # URI and label (title) of GIT logo link
  71 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  72 #our $logo_label = "git documentation";
  73 our $logo_url = "http://git.or.cz/";
  74 our $logo_label = "git homepage";
  75
  76 # source of projects list
  77 our $projects_list = "++GITWEB_LIST++";
  78
  79 # the width (in characters) of the projects list "Description" column
  80 our $projects_list_description_width = 25;
  81
  82 # default order of projects list
  83 # valid values are none, project, descr, owner, and age
  84 our $default_projects_order = "project";
  85
  86 # show repository only if this file exists
  87 # (only effective if this variable evaluates to true)
  88 our $export_ok = "++GITWEB_EXPORT_OK++";
  89
  90 # only allow viewing of repositories also shown on the overview page
  91 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  92
  93 # list of git base URLs used for URL to where fetch project from,
  94 # i.e. full URL is "$git_base_url/$project"
  95 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  96
  97 # default blob_plain mimetype and default charset for text/plain blob
  98 our $default_blob_plain_mimetype = 'text/plain';
  99 our $default_text_plain_charset  = undef;
 100
 101 # file to use for guessing MIME types before trying /etc/mime.types
 102 # (relative to the current git repository)
 103 our $mimetypes_file = undef;
 104
 105 # assume this charset if line contains non-UTF-8 characters;
 106 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 107 # for which encoding all byte sequences are valid, for example
 108 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 109 # could be even 'utf-8' for the old behavior)
 110 our $fallback_encoding = 'latin1';
 111
 112 # rename detection options for git-diff and git-diff-tree
 113 # - default is '-M', with the cost proportional to
 114 #   (number of removed files) * (number of new files).
 115 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 116 #   (number of changed files + number of removed files) * (number of new files)
 117 # - even more costly is '-C', '--find-copies-harder' with cost
 118 #   (number of files in the original tree) * (number of new files)
 119 # - one might want to include '-B' option, e.g. '-B', '-M'
 120 our @diff_opts = ('-M'); # taken from git_commit
 121
 122 # information about snapshot formats that gitweb is capable of serving
 123 our %known_snapshot_formats = (
 124         # name => {
 125         #       'display' => display name,
 126         #       'type' => mime type,
 127         #       'suffix' => filename suffix,
 128         #       'format' => --format for git-archive,
 129         #       'compressor' => [compressor command and arguments]
 130         #                       (array reference, optional)}
 131         #
 132         'tgz' => {
 133                 'display' => 'tar.gz',
 134                 'type' => 'application/x-gzip',
 135                 'suffix' => '.tar.gz',
 136                 'format' => 'tar',
 137                 'compressor' => ['gzip']},
 138
 139         'tbz2' => {
 140                 'display' => 'tar.bz2',
 141                 'type' => 'application/x-bzip2',
 142                 'suffix' => '.tar.bz2',
 143                 'format' => 'tar',
 144                 'compressor' => ['bzip2']},
 145
 146         'zip' => {
 147                 'display' => 'zip',
 148                 'type' => 'application/x-zip',
 149                 'suffix' => '.zip',
 150                 'format' => 'zip'},
 151 );
 152
 153 # Aliases so we understand old gitweb.snapshot values in repository
 154 # configuration.
 155 our %known_snapshot_format_aliases = (
 156         'gzip'  => 'tgz',
 157         'bzip2' => 'tbz2',
 158
 159         # backward compatibility: legacy gitweb config support
 160         'x-gzip' => undef, 'gz' => undef,
 161         'x-bzip2' => undef, 'bz2' => undef,
 162         'x-zip' => undef, '' => undef,
 163 );
 164
 165 # You define site-wide feature defaults here; override them with
 166 # $GITWEB_CONFIG as necessary.
 167 our %feature = (
 168         # feature => {
 169         #       'sub' => feature-sub (subroutine),
 170         #       'override' => allow-override (boolean),
 171         #       'default' => [ default options...] (array reference)}
 172         #
 173         # if feature is overridable (it means that allow-override has true value),
 174         # then feature-sub will be called with default options as parameters;
 175         # return value of feature-sub indicates if to enable specified feature
 176         #
 177         # if there is no 'sub' key (no feature-sub), then feature cannot be
 178         # overriden
 179         #
 180         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 181
 182         # Enable the 'blame' blob view, showing the last commit that modified
 183         # each line in the file. This can be very CPU-intensive.
 184
 185         # To enable system wide have in $GITWEB_CONFIG
 186         # $feature{'blame'}{'default'} = [1];
 187         # To have project specific config enable override in $GITWEB_CONFIG
 188         # $feature{'blame'}{'override'} = 1;
 189         # and in project config gitweb.blame = 0|1;
 190         'blame' => {
 191                 'sub' => \&feature_blame,
 192                 'override' => 0,
 193                 'default' => [0]},
 194
 195         # Enable the 'snapshot' link, providing a compressed archive of any
 196         # tree. This can potentially generate high traffic if you have large
 197         # project.
 198
 199         # Value is a list of formats defined in %known_snapshot_formats that
 200         # you wish to offer.
 201         # To disable system wide have in $GITWEB_CONFIG
 202         # $feature{'snapshot'}{'default'} = [];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'snapshot'}{'override'} = 1;
 205         # and in project config, a comma-separated list of formats or "none"
 206         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 207         'snapshot' => {
 208                 'sub' => \&feature_snapshot,
 209                 'override' => 0,
 210                 'default' => ['tgz']},
 211
 212         # Enable text search, which will list the commits which match author,
 213         # committer or commit text to a given string.  Enabled by default.
 214         # Project specific override is not supported.
 215         'search' => {
 216                 'override' => 0,
 217                 'default' => [1]},
 218
 219         # Enable grep search, which will list the files in currently selected
 220         # tree containing the given string. Enabled by default. This can be
 221         # potentially CPU-intensive, of course.
 222
 223         # To enable system wide have in $GITWEB_CONFIG
 224         # $feature{'grep'}{'default'} = [1];
 225         # To have project specific config enable override in $GITWEB_CONFIG
 226         # $feature{'grep'}{'override'} = 1;
 227         # and in project config gitweb.grep = 0|1;
 228         'grep' => {
 229                 'override' => 0,
 230                 'default' => [1]},
 231
 232         # Enable the pickaxe search, which will list the commits that modified
 233         # a given string in a file. This can be practical and quite faster
 234         # alternative to 'blame', but still potentially CPU-intensive.
 235
 236         # To enable system wide have in $GITWEB_CONFIG
 237         # $feature{'pickaxe'}{'default'} = [1];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'pickaxe'}{'override'} = 1;
 240         # and in project config gitweb.pickaxe = 0|1;
 241         'pickaxe' => {
 242                 'sub' => \&feature_pickaxe,
 243                 'override' => 0,
 244                 'default' => [1]},
 245
 246         # Make gitweb use an alternative format of the URLs which can be
 247         # more readable and natural-looking: project name is embedded
 248         # directly in the path and the query string contains other
 249         # auxiliary information. All gitweb installations recognize
 250         # URL in either format; this configures in which formats gitweb
 251         # generates links.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pathinfo'}{'default'} = [1];
 255         # Project specific override is not supported.
 256
 257         # Note that you will need to change the default location of CSS,
 258         # favicon, logo and possibly other files to an absolute URL. Also,
 259         # if gitweb.cgi serves as your indexfile, you will need to force
 260         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 261         'pathinfo' => {
 262                 'override' => 0,
 263                 'default' => [0]},
 264
 265         # Make gitweb consider projects in project root subdirectories
 266         # to be forks of existing projects. Given project $projname.git,
 267         # projects matching $projname/*.git will not be shown in the main
 268         # projects list, instead a '+' mark will be added to $projname
 269         # there and a 'forks' view will be enabled for the project, listing
 270         # all the forks. If project list is taken from a file, forks have
 271         # to be listed after the main project.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'forks'}{'default'} = [1];
 275         # Project specific override is not supported.
 276         'forks' => {
 277                 'override' => 0,
 278                 'default' => [0]},
 279 );
 280
 281 sub gitweb_check_feature {
 282         my ($name) = @_;
 283         return unless exists $feature{$name};
 284         my ($sub, $override, @defaults) = (
 285                 $feature{$name}{'sub'},
 286                 $feature{$name}{'override'},
 287                 @{$feature{$name}{'default'}});
 288         if (!$override) { return @defaults; }
 289         if (!defined $sub) {
 290                 warn "feature $name is not overrideable";
 291                 return @defaults;
 292         }
 293         return $sub->(@defaults);
 294 }
 295
 296 sub feature_blame {
 297         my ($val) = git_get_project_config('blame', '--bool');
 298
 299         if ($val eq 'true') {
 300                 return 1;
 301         } elsif ($val eq 'false') {
 302                 return 0;
 303         }
 304
 305         return $_[0];
 306 }
 307
 308 sub feature_snapshot {
 309         my (@fmts) = @_;
 310
 311         my ($val) = git_get_project_config('snapshot');
 312
 313         if ($val) {
 314                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 315         }
 316
 317         return @fmts;
 318 }
 319
 320 sub feature_grep {
 321         my ($val) = git_get_project_config('grep', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return (1);
 325         } elsif ($val eq 'false') {
 326                 return (0);
 327         }
 328
 329         return ($_[0]);
 330 }
 331
 332 sub feature_pickaxe {
 333         my ($val) = git_get_project_config('pickaxe', '--bool');
 334
 335         if ($val eq 'true') {
 336                 return (1);
 337         } elsif ($val eq 'false') {
 338                 return (0);
 339         }
 340
 341         return ($_[0]);
 342 }
 343
 344 # checking HEAD file with -e is fragile if the repository was
 345 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 346 # and then pruned.
 347 sub check_head_link {
 348         my ($dir) = @_;
 349         my $headfile = "$dir/HEAD";
 350         return ((-e $headfile) ||
 351                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 352 }
 353
 354 sub check_export_ok {
 355         my ($dir) = @_;
 356         return (check_head_link($dir) &&
 357                 (!$export_ok || -e "$dir/$export_ok"));
 358 }
 359
 360 # process alternate names for backward compatibility
 361 # filter out unsupported (unknown) snapshot formats
 362 sub filter_snapshot_fmts {
 363         my @fmts = @_;
 364
 365         @fmts = map {
 366                 exists $known_snapshot_format_aliases{$_} ?
 367                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 368         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 369
 370 }
 371
 372 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 373 if (-e $GITWEB_CONFIG) {
 374         do $GITWEB_CONFIG;
 375 } else {
 376         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 377         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 378 }
 379
 380 # version of the core git binary
 381 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 382
 383 $projects_list ||= $projectroot;
 384
 385 # ======================================================================
 386 # input validation and dispatch
 387 our $action = $cgi->param('a');
 388 if (defined $action) {
 389         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 390                 die_error(400, "Invalid action parameter");
 391         }
 392 }
 393
 394 # parameters which are pathnames
 395 our $project = $cgi->param('p');
 396 if (defined $project) {
 397         if (!validate_pathname($project) ||
 398             !(-d "$projectroot/$project") ||
 399             !check_head_link("$projectroot/$project") ||
 400             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 401             ($strict_export && !project_in_list($project))) {
 402                 undef $project;
 403                 die_error(404, "No such project");
 404         }
 405 }
 406
 407 our $file_name = $cgi->param('f');
 408 if (defined $file_name) {
 409         if (!validate_pathname($file_name)) {
 410                 die_error(400, "Invalid file parameter");
 411         }
 412 }
 413
 414 our $file_parent = $cgi->param('fp');
 415 if (defined $file_parent) {
 416         if (!validate_pathname($file_parent)) {
 417                 die_error(400, "Invalid file parent parameter");
 418         }
 419 }
 420
 421 # parameters which are refnames
 422 our $hash = $cgi->param('h');
 423 if (defined $hash) {
 424         if (!validate_refname($hash)) {
 425                 die_error(400, "Invalid hash parameter");
 426         }
 427 }
 428
 429 our $hash_parent = $cgi->param('hp');
 430 if (defined $hash_parent) {
 431         if (!validate_refname($hash_parent)) {
 432                 die_error(400, "Invalid hash parent parameter");
 433         }
 434 }
 435
 436 our $hash_base = $cgi->param('hb');
 437 if (defined $hash_base) {
 438         if (!validate_refname($hash_base)) {
 439                 die_error(400, "Invalid hash base parameter");
 440         }
 441 }
 442
 443 my %allowed_options = (
 444         "--no-merges" => [ qw(rss atom log shortlog history) ],
 445 );
 446
 447 our @extra_options = $cgi->param('opt');
 448 if (defined @extra_options) {
 449         foreach my $opt (@extra_options) {
 450                 if (not exists $allowed_options{$opt}) {
 451                         die_error(400, "Invalid option parameter");
 452                 }
 453                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 454                         die_error(400, "Invalid option parameter for this action");
 455                 }
 456         }
 457 }
 458
 459 our $hash_parent_base = $cgi->param('hpb');
 460 if (defined $hash_parent_base) {
 461         if (!validate_refname($hash_parent_base)) {
 462                 die_error(400, "Invalid hash parent base parameter");
 463         }
 464 }
 465
 466 # other parameters
 467 our $page = $cgi->param('pg');
 468 if (defined $page) {
 469         if ($page =~ m/[^0-9]/) {
 470                 die_error(400, "Invalid page parameter");
 471         }
 472 }
 473
 474 our $searchtype = $cgi->param('st');
 475 if (defined $searchtype) {
 476         if ($searchtype =~ m/[^a-z]/) {
 477                 die_error(400, "Invalid searchtype parameter");
 478         }
 479 }
 480
 481 our $search_use_regexp = $cgi->param('sr');
 482
 483 our $searchtext = $cgi->param('s');
 484 our $search_regexp;
 485 if (defined $searchtext) {
 486         if (length($searchtext) < 2) {
 487                 die_error(403, "At least two characters are required for search parameter");
 488         }
 489         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 490 }
 491
 492 # now read PATH_INFO and use it as alternative to parameters
 493 sub evaluate_path_info {
 494         return if defined $project;
 495         my $path_info = $ENV{"PATH_INFO"};
 496         return if !$path_info;
 497         $path_info =~ s,^/+,,;
 498         return if !$path_info;
 499         # find which part of PATH_INFO is project
 500         $project = $path_info;
 501         $project =~ s,/+$,,;
 502         while ($project && !check_head_link("$projectroot/$project")) {
 503                 $project =~ s,/*[^/]*$,,;
 504         }
 505         # validate project
 506         $project = validate_pathname($project);
 507         if (!$project ||
 508             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 509             ($strict_export && !project_in_list($project))) {
 510                 undef $project;
 511                 return;
 512         }
 513         # do not change any parameters if an action is given using the query string
 514         return if $action;
 515         $path_info =~ s,^\Q$project\E/*,,;
 516         my ($refname, $pathname) = split(/:/, $path_info, 2);
 517         if (defined $pathname) {
 518                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 519                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 520                 $pathname =~ s,^/+,,;
 521                 if (!$pathname || substr($pathname, -1) eq "/") {
 522                         $action  ||= "tree";
 523                         $pathname =~ s,/$,,;
 524                 } else {
 525                         $action  ||= "blob_plain";
 526                 }
 527                 $hash_base ||= validate_refname($refname);
 528                 $file_name ||= validate_pathname($pathname);
 529         } elsif (defined $refname) {
 530                 # we got "project.git/branch"
 531                 $action ||= "shortlog";
 532                 $hash   ||= validate_refname($refname);
 533         }
 534 }
 535 evaluate_path_info();
 536
 537 # path to the current git repository
 538 our $git_dir;
 539 $git_dir = "$projectroot/$project" if $project;
 540
 541 # dispatch
 542 my %actions = (
 543         "blame" => \&git_blame,
 544         "blobdiff" => \&git_blobdiff,
 545         "blobdiff_plain" => \&git_blobdiff_plain,
 546         "blob" => \&git_blob,
 547         "blob_plain" => \&git_blob_plain,
 548         "commitdiff" => \&git_commitdiff,
 549         "commitdiff_plain" => \&git_commitdiff_plain,
 550         "commit" => \&git_commit,
 551         "forks" => \&git_forks,
 552         "heads" => \&git_heads,
 553         "history" => \&git_history,
 554         "log" => \&git_log,
 555         "rss" => \&git_rss,
 556         "atom" => \&git_atom,
 557         "search" => \&git_search,
 558         "search_help" => \&git_search_help,
 559         "shortlog" => \&git_shortlog,
 560         "summary" => \&git_summary,
 561         "tag" => \&git_tag,
 562         "tags" => \&git_tags,
 563         "tree" => \&git_tree,
 564         "snapshot" => \&git_snapshot,
 565         "object" => \&git_object,
 566         # those below don't need $project
 567         "opml" => \&git_opml,
 568         "project_list" => \&git_project_list,
 569         "project_index" => \&git_project_index,
 570 );
 571
 572 if (!defined $action) {
 573         if (defined $hash) {
 574                 $action = git_get_type($hash);
 575         } elsif (defined $hash_base && defined $file_name) {
 576                 $action = git_get_type("$hash_base:$file_name");
 577         } elsif (defined $project) {
 578                 $action = 'summary';
 579         } else {
 580                 $action = 'project_list';
 581         }
 582 }
 583 if (!defined($actions{$action})) {
 584         die_error(400, "Unknown action");
 585 }
 586 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 587     !$project) {
 588         die_error(400, "Project needed");
 589 }
 590 $actions{$action}->();
 591 exit;
 592
 593 ## ======================================================================
 594 ## action links
 595
 596 sub href (%) {
 597         my %params = @_;
 598         # default is to use -absolute url() i.e. $my_uri
 599         my $href = $params{-full} ? $my_url : $my_uri;
 600
 601         # XXX: Warning: If you touch this, check the search form for updating,
 602         # too.
 603
 604         my @mapping = (
 605                 project => "p",
 606                 action => "a",
 607                 file_name => "f",
 608                 file_parent => "fp",
 609                 hash => "h",
 610                 hash_parent => "hp",
 611                 hash_base => "hb",
 612                 hash_parent_base => "hpb",
 613                 page => "pg",
 614                 order => "o",
 615                 searchtext => "s",
 616                 searchtype => "st",
 617                 snapshot_format => "sf",
 618                 extra_options => "opt",
 619                 search_use_regexp => "sr",
 620         );
 621         my %mapping = @mapping;
 622
 623         $params{'project'} = $project unless exists $params{'project'};
 624
 625         if ($params{-replay}) {
 626                 while (my ($name, $symbol) = each %mapping) {
 627                         if (!exists $params{$name}) {
 628                                 # to allow for multivalued params we use arrayref form
 629                                 $params{$name} = [ $cgi->param($symbol) ];
 630                         }
 631                 }
 632         }
 633
 634         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 635         if ($use_pathinfo) {
 636                 # use PATH_INFO for project name
 637                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 638                 delete $params{'project'};
 639
 640                 # Summary just uses the project path URL
 641                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 642                         delete $params{'action'};
 643                 }
 644         }
 645
 646         # now encode the parameters explicitly
 647         my @result = ();
 648         for (my $i = 0; $i < @mapping; $i += 2) {
 649                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 650                 if (defined $params{$name}) {
 651                         if (ref($params{$name}) eq "ARRAY") {
 652                                 foreach my $par (@{$params{$name}}) {
 653                                         push @result, $symbol . "=" . esc_param($par);
 654                                 }
 655                         } else {
 656                                 push @result, $symbol . "=" . esc_param($params{$name});
 657                         }
 658                 }
 659         }
 660         $href .= "?" . join(';', @result) if scalar @result;
 661
 662         return $href;
 663 }
 664
 665
 666 ## ======================================================================
 667 ## validation, quoting/unquoting and escaping
 668
 669 sub validate_pathname {
 670         my $input = shift || return undef;
 671
 672         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 673         # at the beginning, at the end, and between slashes.
 674         # also this catches doubled slashes
 675         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 676                 return undef;
 677         }
 678         # no null characters
 679         if ($input =~ m!\0!) {
 680                 return undef;
 681         }
 682         return $input;
 683 }
 684
 685 sub validate_refname {
 686         my $input = shift || return undef;
 687
 688         # textual hashes are O.K.
 689         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 690                 return $input;
 691         }
 692         # it must be correct pathname
 693         $input = validate_pathname($input)
 694                 or return undef;
 695         # restrictions on ref name according to git-check-ref-format
 696         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 697                 return undef;
 698         }
 699         return $input;
 700 }
 701
 702 # decode sequences of octets in utf8 into Perl's internal form,
 703 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 704 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 705 sub to_utf8 {
 706         my $str = shift;
 707         if (utf8::valid($str)) {
 708                 utf8::decode($str);
 709                 return $str;
 710         } else {
 711                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 712         }
 713 }
 714
 715 # quote unsafe chars, but keep the slash, even when it's not
 716 # correct, but quoted slashes look too horrible in bookmarks
 717 sub esc_param {
 718         my $str = shift;
 719         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 720         $str =~ s/\+/%2B/g;
 721         $str =~ s/ /\+/g;
 722         return $str;
 723 }
 724
 725 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 726 sub esc_url {
 727         my $str = shift;
 728         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 729         $str =~ s/\+/%2B/g;
 730         $str =~ s/ /\+/g;
 731         return $str;
 732 }
 733
 734 # replace invalid utf8 character with SUBSTITUTION sequence
 735 sub esc_html ($;%) {
 736         my $str = shift;
 737         my %opts = @_;
 738
 739         $str = to_utf8($str);
 740         $str = $cgi->escapeHTML($str);
 741         if ($opts{'-nbsp'}) {
 742                 $str =~ s/ /&nbsp;/g;
 743         }
 744         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 745         return $str;
 746 }
 747
 748 # quote control characters and escape filename to HTML
 749 sub esc_path {
 750         my $str = shift;
 751         my %opts = @_;
 752
 753         $str = to_utf8($str);
 754         $str = $cgi->escapeHTML($str);
 755         if ($opts{'-nbsp'}) {
 756                 $str =~ s/ /&nbsp;/g;
 757         }
 758         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 759         return $str;
 760 }
 761
 762 # Make control characters "printable", using character escape codes (CEC)
 763 sub quot_cec {
 764         my $cntrl = shift;
 765         my %opts = @_;
 766         my %es = ( # character escape codes, aka escape sequences
 767                 "\t" => '\t',   # tab            (HT)
 768                 "\n" => '\n',   # line feed      (LF)
 769                 "\r" => '\r',   # carrige 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                 "\013" => '\v', # vertical tab   (VT)
 775                 "\000" => '\0', # nul character  (NUL)
 776         );
 777         my $chr = ( (exists $es{$cntrl})
 778                     ? $es{$cntrl}
 779                     : sprintf('\%03o', ord($cntrl)) );
 780         if ($opts{-nohtml}) {
 781                 return $chr;
 782         } else {
 783                 return "<span class=\"cntrl\">$chr</span>";
 784         }
 785 }
 786
 787 # Alternatively use unicode control pictures codepoints,
 788 # Unicode "printable representation" (PR)
 789 sub quot_upr {
 790         my $cntrl = shift;
 791         my %opts = @_;
 792
 793         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 794         if ($opts{-nohtml}) {
 795                 return $chr;
 796         } else {
 797                 return "<span class=\"cntrl\">$chr</span>";
 798         }
 799 }
 800
 801 # git may return quoted and escaped filenames
 802 sub unquote {
 803         my $str = shift;
 804
 805         sub unq {
 806                 my $seq = shift;
 807                 my %es = ( # character escape codes, aka escape sequences
 808                         't' => "\t",   # tab            (HT, TAB)
 809                         'n' => "\n",   # newline        (NL)
 810                         'r' => "\r",   # return         (CR)
 811                         'f' => "\f",   # form feed      (FF)
 812                         'b' => "\b",   # backspace      (BS)
 813                         'a' => "\a",   # alarm (bell)   (BEL)
 814                         'e' => "\e",   # escape         (ESC)
 815                         'v' => "\013", # vertical tab   (VT)
 816                 );
 817
 818                 if ($seq =~ m/^[0-7]{1,3}$/) {
 819                         # octal char sequence
 820                         return chr(oct($seq));
 821                 } elsif (exists $es{$seq}) {
 822                         # C escape sequence, aka character escape code
 823                         return $es{$seq};
 824                 }
 825                 # quoted ordinary character
 826                 return $seq;
 827         }
 828
 829         if ($str =~ m/^"(.*)"$/) {
 830                 # needs unquoting
 831                 $str = $1;
 832                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 833         }
 834         return $str;
 835 }
 836
 837 # escape tabs (convert tabs to spaces)
 838 sub untabify {
 839         my $line = shift;
 840
 841         while ((my $pos = index($line, "\t")) != -1) {
 842                 if (my $count = (8 - ($pos % 8))) {
 843                         my $spaces = ' ' x $count;
 844                         $line =~ s/\t/$spaces/;
 845                 }
 846         }
 847
 848         return $line;
 849 }
 850
 851 sub project_in_list {
 852         my $project = shift;
 853         my @list = git_get_projects_list();
 854         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 855 }
 856
 857 ## ----------------------------------------------------------------------
 858 ## HTML aware string manipulation
 859
 860 # Try to chop given string on a word boundary between position
 861 # $len and $len+$add_len. If there is no word boundary there,
 862 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 863 # (marking chopped part) would be longer than given string.
 864 sub chop_str {
 865         my $str = shift;
 866         my $len = shift;
 867         my $add_len = shift || 10;
 868         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 869
 870         # Make sure perl knows it is utf8 encoded so we don't
 871         # cut in the middle of a utf8 multibyte char.
 872         $str = to_utf8($str);
 873
 874         # allow only $len chars, but don't cut a word if it would fit in $add_len
 875         # if it doesn't fit, cut it if it's still longer than the dots we would add
 876         # remove chopped character entities entirely
 877
 878         # when chopping in the middle, distribute $len into left and right part
 879         # return early if chopping wouldn't make string shorter
 880         if ($where eq 'center') {
 881                 return $str if ($len + 5 >= length($str)); # filler is length 5
 882                 $len = int($len/2);
 883         } else {
 884                 return $str if ($len + 4 >= length($str)); # filler is length 4
 885         }
 886
 887         # regexps: ending and beginning with word part up to $add_len
 888         my $endre = qr/.{$len}\w{0,$add_len}/;
 889         my $begre = qr/\w{0,$add_len}.{$len}/;
 890
 891         if ($where eq 'left') {
 892                 $str =~ m/^(.*?)($begre)$/;
 893                 my ($lead, $body) = ($1, $2);
 894                 if (length($lead) > 4) {
 895                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 896                         $lead = " ...";
 897                 }
 898                 return "$lead$body";
 899
 900         } elsif ($where eq 'center') {
 901                 $str =~ m/^($endre)(.*)$/;
 902                 my ($left, $str)  = ($1, $2);
 903                 $str =~ m/^(.*?)($begre)$/;
 904                 my ($mid, $right) = ($1, $2);
 905                 if (length($mid) > 5) {
 906                         $left  =~ s/&[^;]*$//;
 907                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 908                         $mid = " ... ";
 909                 }
 910                 return "$left$mid$right";
 911
 912         } else {
 913                 $str =~ m/^($endre)(.*)$/;
 914                 my $body = $1;
 915                 my $tail = $2;
 916                 if (length($tail) > 4) {
 917                         $body =~ s/&[^;]*$//;
 918                         $tail = "... ";
 919                 }
 920                 return "$body$tail";
 921         }
 922 }
 923
 924 # takes the same arguments as chop_str, but also wraps a <span> around the
 925 # result with a title attribute if it does get chopped. Additionally, the
 926 # string is HTML-escaped.
 927 sub chop_and_escape_str {
 928         my ($str) = @_;
 929
 930         my $chopped = chop_str(@_);
 931         if ($chopped eq $str) {
 932                 return esc_html($chopped);
 933         } else {
 934                 $str =~ s/([[:cntrl:]])/?/g;
 935                 return $cgi->span({-title=>$str}, esc_html($chopped));
 936         }
 937 }
 938
 939 ## ----------------------------------------------------------------------
 940 ## functions returning short strings
 941
 942 # CSS class for given age value (in seconds)
 943 sub age_class {
 944         my $age = shift;
 945
 946         if (!defined $age) {
 947                 return "noage";
 948         } elsif ($age < 60*60*2) {
 949                 return "age0";
 950         } elsif ($age < 60*60*24*2) {
 951                 return "age1";
 952         } else {
 953                 return "age2";
 954         }
 955 }
 956
 957 # convert age in seconds to "nn units ago" string
 958 sub age_string {
 959         my $age = shift;
 960         my $age_str;
 961
 962         if ($age > 60*60*24*365*2) {
 963                 $age_str = (int $age/60/60/24/365);
 964                 $age_str .= " years ago";
 965         } elsif ($age > 60*60*24*(365/12)*2) {
 966                 $age_str = int $age/60/60/24/(365/12);
 967                 $age_str .= " months ago";
 968         } elsif ($age > 60*60*24*7*2) {
 969                 $age_str = int $age/60/60/24/7;
 970                 $age_str .= " weeks ago";
 971         } elsif ($age > 60*60*24*2) {
 972                 $age_str = int $age/60/60/24;
 973                 $age_str .= " days ago";
 974         } elsif ($age > 60*60*2) {
 975                 $age_str = int $age/60/60;
 976                 $age_str .= " hours ago";
 977         } elsif ($age > 60*2) {
 978                 $age_str = int $age/60;
 979                 $age_str .= " min ago";
 980         } elsif ($age > 2) {
 981                 $age_str = int $age;
 982                 $age_str .= " sec ago";
 983         } else {
 984                 $age_str .= " right now";
 985         }
 986         return $age_str;
 987 }
 988
 989 use constant {
 990         S_IFINVALID => 0030000,
 991         S_IFGITLINK => 0160000,
 992 };
 993
 994 # submodule/subproject, a commit object reference
 995 sub S_ISGITLINK($) {
 996         my $mode = shift;
 997
 998         return (($mode & S_IFMT) == S_IFGITLINK)
 999 }
1000
1001 # convert file mode in octal to symbolic file mode string
1002 sub mode_str {
1003         my $mode = oct shift;
1004
1005         if (S_ISGITLINK($mode)) {
1006                 return 'm---------';
1007         } elsif (S_ISDIR($mode & S_IFMT)) {
1008                 return 'drwxr-xr-x';
1009         } elsif (S_ISLNK($mode)) {
1010                 return 'lrwxrwxrwx';
1011         } elsif (S_ISREG($mode)) {
1012                 # git cares only about the executable bit
1013                 if ($mode & S_IXUSR) {
1014                         return '-rwxr-xr-x';
1015                 } else {
1016                         return '-rw-r--r--';
1017                 };
1018         } else {
1019                 return '----------';
1020         }
1021 }
1022
1023 # convert file mode in octal to file type string
1024 sub file_type {
1025         my $mode = shift;
1026
1027         if ($mode !~ m/^[0-7]+$/) {
1028                 return $mode;
1029         } else {
1030                 $mode = oct $mode;
1031         }
1032
1033         if (S_ISGITLINK($mode)) {
1034                 return "submodule";
1035         } elsif (S_ISDIR($mode & S_IFMT)) {
1036                 return "directory";
1037         } elsif (S_ISLNK($mode)) {
1038                 return "symlink";
1039         } elsif (S_ISREG($mode)) {
1040                 return "file";
1041         } else {
1042                 return "unknown";
1043         }
1044 }
1045
1046 # convert file mode in octal to file type description string
1047 sub file_type_long {
1048         my $mode = shift;
1049
1050         if ($mode !~ m/^[0-7]+$/) {
1051                 return $mode;
1052         } else {
1053                 $mode = oct $mode;
1054         }
1055
1056         if (S_ISGITLINK($mode)) {
1057                 return "submodule";
1058         } elsif (S_ISDIR($mode & S_IFMT)) {
1059                 return "directory";
1060         } elsif (S_ISLNK($mode)) {
1061                 return "symlink";
1062         } elsif (S_ISREG($mode)) {
1063                 if ($mode & S_IXUSR) {
1064                         return "executable";
1065                 } else {
1066                         return "file";
1067                 };
1068         } else {
1069                 return "unknown";
1070         }
1071 }
1072
1073
1074 ## ----------------------------------------------------------------------
1075 ## functions returning short HTML fragments, or transforming HTML fragments
1076 ## which don't belong to other sections
1077
1078 # format line of commit message.
1079 sub format_log_line_html {
1080         my $line = shift;
1081
1082         $line = esc_html($line, -nbsp=>1);
1083         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1084                 my $hash_text = $1;
1085                 my $link =
1086                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1087                                 -class => "text"}, $hash_text);
1088                 $line =~ s/$hash_text/$link/;
1089         }
1090         return $line;
1091 }
1092
1093 # format marker of refs pointing to given object
1094 sub format_ref_marker {
1095         my ($refs, $id) = @_;
1096         my $markers = '';
1097
1098         if (defined $refs->{$id}) {
1099                 foreach my $ref (@{$refs->{$id}}) {
1100                         my ($type, $name) = qw();
1101                         # e.g. tags/v2.6.11 or heads/next
1102                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1103                                 $type = $1;
1104                                 $name = $2;
1105                         } else {
1106                                 $type = "ref";
1107                                 $name = $ref;
1108                         }
1109
1110                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1111                                     esc_html($name) . "</span>";
1112                 }
1113         }
1114
1115         if ($markers) {
1116                 return ' <span class="refs">'. $markers . '</span>';
1117         } else {
1118                 return "";
1119         }
1120 }
1121
1122 # format, perhaps shortened and with markers, title line
1123 sub format_subject_html {
1124         my ($long, $short, $href, $extra) = @_;
1125         $extra = '' unless defined($extra);
1126
1127         if (length($short) < length($long)) {
1128                 return $cgi->a({-href => $href, -class => "list subject",
1129                                 -title => to_utf8($long)},
1130                        esc_html($short) . $extra);
1131         } else {
1132                 return $cgi->a({-href => $href, -class => "list subject"},
1133                        esc_html($long)  . $extra);
1134         }
1135 }
1136
1137 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1138 sub format_git_diff_header_line {
1139         my $line = shift;
1140         my $diffinfo = shift;
1141         my ($from, $to) = @_;
1142
1143         if ($diffinfo->{'nparents'}) {
1144                 # combined diff
1145                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1146                 if ($to->{'href'}) {
1147                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1148                                          esc_path($to->{'file'}));
1149                 } else { # file was deleted (no href)
1150                         $line .= esc_path($to->{'file'});
1151                 }
1152         } else {
1153                 # "ordinary" diff
1154                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1155                 if ($from->{'href'}) {
1156                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1157                                          'a/' . esc_path($from->{'file'}));
1158                 } else { # file was added (no href)
1159                         $line .= 'a/' . esc_path($from->{'file'});
1160                 }
1161                 $line .= ' ';
1162                 if ($to->{'href'}) {
1163                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1164                                          'b/' . esc_path($to->{'file'}));
1165                 } else { # file was deleted
1166                         $line .= 'b/' . esc_path($to->{'file'});
1167                 }
1168         }
1169
1170         return "<div class=\"diff header\">$line</div>\n";
1171 }
1172
1173 # format extended diff header line, before patch itself
1174 sub format_extended_diff_header_line {
1175         my $line = shift;
1176         my $diffinfo = shift;
1177         my ($from, $to) = @_;
1178
1179         # match <path>
1180         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1181                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1182                                        esc_path($from->{'file'}));
1183         }
1184         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1185                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1186                                  esc_path($to->{'file'}));
1187         }
1188         # match single <mode>
1189         if ($line =~ m/\s(\d{6})$/) {
1190                 $line .= '<span class="info"> (' .
1191                          file_type_long($1) .
1192                          ')</span>';
1193         }
1194         # match <hash>
1195         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1196                 # can match only for combined diff
1197                 $line = 'index ';
1198                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1199                         if ($from->{'href'}[$i]) {
1200                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1201                                                   -class=>"hash"},
1202                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1203                         } else {
1204                                 $line .= '0' x 7;
1205                         }
1206                         # separator
1207                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1208                 }
1209                 $line .= '..';
1210                 if ($to->{'href'}) {
1211                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1212                                          substr($diffinfo->{'to_id'},0,7));
1213                 } else {
1214                         $line .= '0' x 7;
1215                 }
1216
1217         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1218                 # can match only for ordinary diff
1219                 my ($from_link, $to_link);
1220                 if ($from->{'href'}) {
1221                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1222                                              substr($diffinfo->{'from_id'},0,7));
1223                 } else {
1224                         $from_link = '0' x 7;
1225                 }
1226                 if ($to->{'href'}) {
1227                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1228                                            substr($diffinfo->{'to_id'},0,7));
1229                 } else {
1230                         $to_link = '0' x 7;
1231                 }
1232                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1233                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1234         }
1235
1236         return $line . "<br/>\n";
1237 }
1238
1239 # format from-file/to-file diff header
1240 sub format_diff_from_to_header {
1241         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1242         my $line;
1243         my $result = '';
1244
1245         $line = $from_line;
1246         #assert($line =~ m/^---/) if DEBUG;
1247         # no extra formatting for "^--- /dev/null"
1248         if (! $diffinfo->{'nparents'}) {
1249                 # ordinary (single parent) diff
1250                 if ($line =~ m!^--- "?a/!) {
1251                         if ($from->{'href'}) {
1252                                 $line = '--- a/' .
1253                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1254                                                 esc_path($from->{'file'}));
1255                         } else {
1256                                 $line = '--- a/' .
1257                                         esc_path($from->{'file'});
1258                         }
1259                 }
1260                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1261
1262         } else {
1263                 # combined diff (merge commit)
1264                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1265                         if ($from->{'href'}[$i]) {
1266                                 $line = '--- ' .
1267                                         $cgi->a({-href=>href(action=>"blobdiff",
1268                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1269                                                              hash_parent_base=>$parents[$i],
1270                                                              file_parent=>$from->{'file'}[$i],
1271                                                              hash=>$diffinfo->{'to_id'},
1272                                                              hash_base=>$hash,
1273                                                              file_name=>$to->{'file'}),
1274                                                  -class=>"path",
1275                                                  -title=>"diff" . ($i+1)},
1276                                                 $i+1) .
1277                                         '/' .
1278                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1279                                                 esc_path($from->{'file'}[$i]));
1280                         } else {
1281                                 $line = '--- /dev/null';
1282                         }
1283                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1284                 }
1285         }
1286
1287         $line = $to_line;
1288         #assert($line =~ m/^\+\+\+/) if DEBUG;
1289         # no extra formatting for "^+++ /dev/null"
1290         if ($line =~ m!^\+\+\+ "?b/!) {
1291                 if ($to->{'href'}) {
1292                         $line = '+++ b/' .
1293                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1294                                         esc_path($to->{'file'}));
1295                 } else {
1296                         $line = '+++ b/' .
1297                                 esc_path($to->{'file'});
1298                 }
1299         }
1300         $result .= qq!<div class="diff to_file">$line</div>\n!;
1301
1302         return $result;
1303 }
1304
1305 # create note for patch simplified by combined diff
1306 sub format_diff_cc_simplified {
1307         my ($diffinfo, @parents) = @_;
1308         my $result = '';
1309
1310         $result .= "<div class=\"diff header\">" .
1311                    "diff --cc ";
1312         if (!is_deleted($diffinfo)) {
1313                 $result .= $cgi->a({-href => href(action=>"blob",
1314                                                   hash_base=>$hash,
1315                                                   hash=>$diffinfo->{'to_id'},
1316                                                   file_name=>$diffinfo->{'to_file'}),
1317                                     -class => "path"},
1318                                    esc_path($diffinfo->{'to_file'}));
1319         } else {
1320                 $result .= esc_path($diffinfo->{'to_file'});
1321         }
1322         $result .= "</div>\n" . # class="diff header"
1323                    "<div class=\"diff nodifferences\">" .
1324                    "Simple merge" .
1325                    "</div>\n"; # class="diff nodifferences"
1326
1327         return $result;
1328 }
1329
1330 # format patch (diff) line (not to be used for diff headers)
1331 sub format_diff_line {
1332         my $line = shift;
1333         my ($from, $to) = @_;
1334         my $diff_class = "";
1335
1336         chomp $line;
1337
1338         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1339                 # combined diff
1340                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1341                 if ($line =~ m/^\@{3}/) {
1342                         $diff_class = " chunk_header";
1343                 } elsif ($line =~ m/^\\/) {
1344                         $diff_class = " incomplete";
1345                 } elsif ($prefix =~ tr/+/+/) {
1346                         $diff_class = " add";
1347                 } elsif ($prefix =~ tr/-/-/) {
1348                         $diff_class = " rem";
1349                 }
1350         } else {
1351                 # assume ordinary diff
1352                 my $char = substr($line, 0, 1);
1353                 if ($char eq '+') {
1354                         $diff_class = " add";
1355                 } elsif ($char eq '-') {
1356                         $diff_class = " rem";
1357                 } elsif ($char eq '@') {
1358                         $diff_class = " chunk_header";
1359                 } elsif ($char eq "\\") {
1360                         $diff_class = " incomplete";
1361                 }
1362         }
1363         $line = untabify($line);
1364         if ($from && $to && $line =~ m/^\@{2} /) {
1365                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1366                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1367
1368                 $from_lines = 0 unless defined $from_lines;
1369                 $to_lines   = 0 unless defined $to_lines;
1370
1371                 if ($from->{'href'}) {
1372                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1373                                              -class=>"list"}, $from_text);
1374                 }
1375                 if ($to->{'href'}) {
1376                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1377                                              -class=>"list"}, $to_text);
1378                 }
1379                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1380                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1381                 return "<div class=\"diff$diff_class\">$line</div>\n";
1382         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1383                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1384                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1385
1386                 @from_text = split(' ', $ranges);
1387                 for (my $i = 0; $i < @from_text; ++$i) {
1388                         ($from_start[$i], $from_nlines[$i]) =
1389                                 (split(',', substr($from_text[$i], 1)), 0);
1390                 }
1391
1392                 $to_text   = pop @from_text;
1393                 $to_start  = pop @from_start;
1394                 $to_nlines = pop @from_nlines;
1395
1396                 $line = "<span class=\"chunk_info\">$prefix ";
1397                 for (my $i = 0; $i < @from_text; ++$i) {
1398                         if ($from->{'href'}[$i]) {
1399                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1400                                                   -class=>"list"}, $from_text[$i]);
1401                         } else {
1402                                 $line .= $from_text[$i];
1403                         }
1404                         $line .= " ";
1405                 }
1406                 if ($to->{'href'}) {
1407                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1408                                           -class=>"list"}, $to_text);
1409                 } else {
1410                         $line .= $to_text;
1411                 }
1412                 $line .= " $prefix</span>" .
1413                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1414                 return "<div class=\"diff$diff_class\">$line</div>\n";
1415         }
1416         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1417 }
1418
1419 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1420 # linked.  Pass the hash of the tree/commit to snapshot.
1421 sub format_snapshot_links {
1422         my ($hash) = @_;
1423         my @snapshot_fmts = gitweb_check_feature('snapshot');
1424         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1425         my $num_fmts = @snapshot_fmts;
1426         if ($num_fmts > 1) {
1427                 # A parenthesized list of links bearing format names.
1428                 # e.g. "snapshot (_tar.gz_ _zip_)"
1429                 return "snapshot (" . join(' ', map
1430                         $cgi->a({
1431                                 -href => href(
1432                                         action=>"snapshot",
1433                                         hash=>$hash,
1434                                         snapshot_format=>$_
1435                                 )
1436                         }, $known_snapshot_formats{$_}{'display'})
1437                 , @snapshot_fmts) . ")";
1438         } elsif ($num_fmts == 1) {
1439                 # A single "snapshot" link whose tooltip bears the format name.
1440                 # i.e. "_snapshot_"
1441                 my ($fmt) = @snapshot_fmts;
1442                 return
1443                         $cgi->a({
1444                                 -href => href(
1445                                         action=>"snapshot",
1446                                         hash=>$hash,
1447                                         snapshot_format=>$fmt
1448                                 ),
1449                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1450                         }, "snapshot");
1451         } else { # $num_fmts == 0
1452                 return undef;
1453         }
1454 }
1455
1456 ## ......................................................................
1457 ## functions returning values to be passed, perhaps after some
1458 ## transformation, to other functions; e.g. returning arguments to href()
1459
1460 # returns hash to be passed to href to generate gitweb URL
1461 # in -title key it returns description of link
1462 sub get_feed_info {
1463         my $format = shift || 'Atom';
1464         my %res = (action => lc($format));
1465
1466         # feed links are possible only for project views
1467         return unless (defined $project);
1468         # some views should link to OPML, or to generic project feed,
1469         # or don't have specific feed yet (so they should use generic)
1470         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1471
1472         my $branch;
1473         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1474         # from tag links; this also makes possible to detect branch links
1475         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1476             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1477                 $branch = $1;
1478         }
1479         # find log type for feed description (title)
1480         my $type = 'log';
1481         if (defined $file_name) {
1482                 $type  = "history of $file_name";
1483                 $type .= "/" if ($action eq 'tree');
1484                 $type .= " on '$branch'" if (defined $branch);
1485         } else {
1486                 $type = "log of $branch" if (defined $branch);
1487         }
1488
1489         $res{-title} = $type;
1490         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1491         $res{'file_name'} = $file_name;
1492
1493         return %res;
1494 }
1495
1496 ## ----------------------------------------------------------------------
1497 ## git utility subroutines, invoking git commands
1498
1499 # returns path to the core git executable and the --git-dir parameter as list
1500 sub git_cmd {
1501         return $GIT, '--git-dir='.$git_dir;
1502 }
1503
1504 # quote the given arguments for passing them to the shell
1505 # quote_command("command", "arg 1", "arg with ' and ! characters")
1506 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1507 # Try to avoid using this function wherever possible.
1508 sub quote_command {
1509         return join(' ',
1510                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1511 }
1512
1513 # get HEAD ref of given project as hash
1514 sub git_get_head_hash {
1515         my $project = shift;
1516         my $o_git_dir = $git_dir;
1517         my $retval = undef;
1518         $git_dir = "$projectroot/$project";
1519         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1520                 my $head = <$fd>;
1521                 close $fd;
1522                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1523                         $retval = $1;
1524                 }
1525         }
1526         if (defined $o_git_dir) {
1527                 $git_dir = $o_git_dir;
1528         }
1529         return $retval;
1530 }
1531
1532 # get type of given object
1533 sub git_get_type {
1534         my $hash = shift;
1535
1536         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1537         my $type = <$fd>;
1538         close $fd or return;
1539         chomp $type;
1540         return $type;
1541 }
1542
1543 # repository configuration
1544 our $config_file = '';
1545 our %config;
1546
1547 # store multiple values for single key as anonymous array reference
1548 # single values stored directly in the hash, not as [ <value> ]
1549 sub hash_set_multi {
1550         my ($hash, $key, $value) = @_;
1551
1552         if (!exists $hash->{$key}) {
1553                 $hash->{$key} = $value;
1554         } elsif (!ref $hash->{$key}) {
1555                 $hash->{$key} = [ $hash->{$key}, $value ];
1556         } else {
1557                 push @{$hash->{$key}}, $value;
1558         }
1559 }
1560
1561 # return hash of git project configuration
1562 # optionally limited to some section, e.g. 'gitweb'
1563 sub git_parse_project_config {
1564         my $section_regexp = shift;
1565         my %config;
1566
1567         local $/ = "\0";
1568
1569         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1570                 or return;
1571
1572         while (my $keyval = <$fh>) {
1573                 chomp $keyval;
1574                 my ($key, $value) = split(/\n/, $keyval, 2);
1575
1576                 hash_set_multi(\%config, $key, $value)
1577                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1578         }
1579         close $fh;
1580
1581         return %config;
1582 }
1583
1584 # convert config value to boolean, 'true' or 'false'
1585 # no value, number > 0, 'true' and 'yes' values are true
1586 # rest of values are treated as false (never as error)
1587 sub config_to_bool {
1588         my $val = shift;
1589
1590         # strip leading and trailing whitespace
1591         $val =~ s/^\s+//;
1592         $val =~ s/\s+$//;
1593
1594         return (!defined $val ||               # section.key
1595                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1596                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1597 }
1598
1599 # convert config value to simple decimal number
1600 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1601 # to be multiplied by 1024, 1048576, or 1073741824
1602 sub config_to_int {
1603         my $val = shift;
1604
1605         # strip leading and trailing whitespace
1606         $val =~ s/^\s+//;
1607         $val =~ s/\s+$//;
1608
1609         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1610                 $unit = lc($unit);
1611                 # unknown unit is treated as 1
1612                 return $num * ($unit eq 'g' ? 1073741824 :
1613                                $unit eq 'm' ?    1048576 :
1614                                $unit eq 'k' ?       1024 : 1);
1615         }
1616         return $val;
1617 }
1618
1619 # convert config value to array reference, if needed
1620 sub config_to_multi {
1621         my $val = shift;
1622
1623         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1624 }
1625
1626 sub git_get_project_config {
1627         my ($key, $type) = @_;
1628
1629         # key sanity check
1630         return unless ($key);
1631         $key =~ s/^gitweb\.//;
1632         return if ($key =~ m/\W/);
1633
1634         # type sanity check
1635         if (defined $type) {
1636                 $type =~ s/^--//;
1637                 $type = undef
1638                         unless ($type eq 'bool' || $type eq 'int');
1639         }
1640
1641         # get config
1642         if (!defined $config_file ||
1643             $config_file ne "$git_dir/config") {
1644                 %config = git_parse_project_config('gitweb');
1645                 $config_file = "$git_dir/config";
1646         }
1647
1648         # ensure given type
1649         if (!defined $type) {
1650                 return $config{"gitweb.$key"};
1651         } elsif ($type eq 'bool') {
1652                 # backward compatibility: 'git config --bool' returns true/false
1653                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1654         } elsif ($type eq 'int') {
1655                 return config_to_int($config{"gitweb.$key"});
1656         }
1657         return $config{"gitweb.$key"};
1658 }
1659
1660 # get hash of given path at given ref
1661 sub git_get_hash_by_path {
1662         my $base = shift;
1663         my $path = shift || return undef;
1664         my $type = shift;
1665
1666         $path =~ s,/+$,,;
1667
1668         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1669                 or die_error(500, "Open git-ls-tree failed");
1670         my $line = <$fd>;
1671         close $fd or return undef;
1672
1673         if (!defined $line) {
1674                 # there is no tree or hash given by $path at $base
1675                 return undef;
1676         }
1677
1678         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1679         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1680         if (defined $type && $type ne $2) {
1681                 # type doesn't match
1682                 return undef;
1683         }
1684         return $3;
1685 }
1686
1687 # get path of entry with given hash at given tree-ish (ref)
1688 # used to get 'from' filename for combined diff (merge commit) for renames
1689 sub git_get_path_by_hash {
1690         my $base = shift || return;
1691         my $hash = shift || return;
1692
1693         local $/ = "\0";
1694
1695         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1696                 or return undef;
1697         while (my $line = <$fd>) {
1698                 chomp $line;
1699
1700                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1701                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1702                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1703                         close $fd;
1704                         return $1;
1705                 }
1706         }
1707         close $fd;
1708         return undef;
1709 }
1710
1711 ## ......................................................................
1712 ## git utility functions, directly accessing git repository
1713
1714 sub git_get_project_description {
1715         my $path = shift;
1716
1717         $git_dir = "$projectroot/$path";
1718         open my $fd, "$git_dir/description"
1719                 or return git_get_project_config('description');
1720         my $descr = <$fd>;
1721         close $fd;
1722         if (defined $descr) {
1723                 chomp $descr;
1724         }
1725         return $descr;
1726 }
1727
1728 sub git_get_project_url_list {
1729         my $path = shift;
1730
1731         $git_dir = "$projectroot/$path";
1732         open my $fd, "$git_dir/cloneurl"
1733                 or return wantarray ?
1734                 @{ config_to_multi(git_get_project_config('url')) } :
1735                    config_to_multi(git_get_project_config('url'));
1736         my @git_project_url_list = map { chomp; $_ } <$fd>;
1737         close $fd;
1738
1739         return wantarray ? @git_project_url_list : \@git_project_url_list;
1740 }
1741
1742 sub git_get_projects_list {
1743         my ($filter) = @_;
1744         my @list;
1745
1746         $filter ||= '';
1747         $filter =~ s/\.git$//;
1748
1749         my ($check_forks) = gitweb_check_feature('forks');
1750
1751         if (-d $projects_list) {
1752                 # search in directory
1753                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1754                 # remove the trailing "/"
1755                 $dir =~ s!/+$!!;
1756                 my $pfxlen = length("$dir");
1757                 my $pfxdepth = ($dir =~ tr!/!!);
1758
1759                 File::Find::find({
1760                         follow_fast => 1, # follow symbolic links
1761                         follow_skip => 2, # ignore duplicates
1762                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1763                         wanted => sub {
1764                                 # skip project-list toplevel, if we get it.
1765                                 return if (m!^[/.]$!);
1766                                 # only directories can be git repositories
1767                                 return unless (-d $_);
1768                                 # don't traverse too deep (Find is super slow on os x)
1769                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1770                                         $File::Find::prune = 1;
1771                                         return;
1772                                 }
1773
1774                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1775                                 # we check related file in $projectroot
1776                                 if ($check_forks and $subdir =~ m#/.#) {
1777                                         $File::Find::prune = 1;
1778                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1779                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1780                                         $File::Find::prune = 1;
1781                                 }
1782                         },
1783                 }, "$dir");
1784
1785         } elsif (-f $projects_list) {
1786                 # read from file(url-encoded):
1787                 # 'git%2Fgit.git Linus+Torvalds'
1788                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1789                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1790                 my %paths;
1791                 open my ($fd), $projects_list or return;
1792         PROJECT:
1793                 while (my $line = <$fd>) {
1794                         chomp $line;
1795                         my ($path, $owner) = split ' ', $line;
1796                         $path = unescape($path);
1797                         $owner = unescape($owner);
1798                         if (!defined $path) {
1799                                 next;
1800                         }
1801                         if ($filter ne '') {
1802                                 # looking for forks;
1803                                 my $pfx = substr($path, 0, length($filter));
1804                                 if ($pfx ne $filter) {
1805                                         next PROJECT;
1806                                 }
1807                                 my $sfx = substr($path, length($filter));
1808                                 if ($sfx !~ /^\/.*\.git$/) {
1809                                         next PROJECT;
1810                                 }
1811                         } elsif ($check_forks) {
1812                         PATH:
1813                                 foreach my $filter (keys %paths) {
1814                                         # looking for forks;
1815                                         my $pfx = substr($path, 0, length($filter));
1816                                         if ($pfx ne $filter) {
1817                                                 next PATH;
1818                                         }
1819                                         my $sfx = substr($path, length($filter));
1820                                         if ($sfx !~ /^\/.*\.git$/) {
1821                                                 next PATH;
1822                                         }
1823                                         # is a fork, don't include it in
1824                                         # the list
1825                                         next PROJECT;
1826                                 }
1827                         }
1828                         if (check_export_ok("$projectroot/$path")) {
1829                                 my $pr = {
1830                                         path => $path,
1831                                         owner => to_utf8($owner),
1832                                 };
1833                                 push @list, $pr;
1834                                 (my $forks_path = $path) =~ s/\.git$//;
1835                                 $paths{$forks_path}++;
1836                         }
1837                 }
1838                 close $fd;
1839         }
1840         return @list;
1841 }
1842
1843 our $gitweb_project_owner = undef;
1844 sub git_get_project_list_from_file {
1845
1846         return if (defined $gitweb_project_owner);
1847
1848         $gitweb_project_owner = {};
1849         # read from file (url-encoded):
1850         # 'git%2Fgit.git Linus+Torvalds'
1851         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1852         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1853         if (-f $projects_list) {
1854                 open (my $fd , $projects_list);
1855                 while (my $line = <$fd>) {
1856                         chomp $line;
1857                         my ($pr, $ow) = split ' ', $line;
1858                         $pr = unescape($pr);
1859                         $ow = unescape($ow);
1860                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1861                 }
1862                 close $fd;
1863         }
1864 }
1865
1866 sub git_get_project_owner {
1867         my $project = shift;
1868         my $owner;
1869
1870         return undef unless $project;
1871         $git_dir = "$projectroot/$project";
1872
1873         if (!defined $gitweb_project_owner) {
1874                 git_get_project_list_from_file();
1875         }
1876
1877         if (exists $gitweb_project_owner->{$project}) {
1878                 $owner = $gitweb_project_owner->{$project};
1879         }
1880         if (!defined $owner){
1881                 $owner = git_get_project_config('owner');
1882         }
1883         if (!defined $owner) {
1884                 $owner = get_file_owner("$git_dir");
1885         }
1886
1887         return $owner;
1888 }
1889
1890 sub git_get_last_activity {
1891         my ($path) = @_;
1892         my $fd;
1893
1894         $git_dir = "$projectroot/$path";
1895         open($fd, "-|", git_cmd(), 'for-each-ref',
1896              '--format=%(committer)',
1897              '--sort=-committerdate',
1898              '--count=1',
1899              'refs/heads') or return;
1900         my $most_recent = <$fd>;
1901         close $fd or return;
1902         if (defined $most_recent &&
1903             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1904                 my $timestamp = $1;
1905                 my $age = time - $timestamp;
1906                 return ($age, age_string($age));
1907         }
1908         return (undef, undef);
1909 }
1910
1911 sub git_get_references {
1912         my $type = shift || "";
1913         my %refs;
1914         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1915         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1916         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1917                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1918                 or return;
1919
1920         while (my $line = <$fd>) {
1921                 chomp $line;
1922                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1923                         if (defined $refs{$1}) {
1924                                 push @{$refs{$1}}, $2;
1925                         } else {
1926                                 $refs{$1} = [ $2 ];
1927                         }
1928                 }
1929         }
1930         close $fd or return;
1931         return \%refs;
1932 }
1933
1934 sub git_get_rev_name_tags {
1935         my $hash = shift || return undef;
1936
1937         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1938                 or return;
1939         my $name_rev = <$fd>;
1940         close $fd;
1941
1942         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1943                 return $1;
1944         } else {
1945                 # catches also '$hash undefined' output
1946                 return undef;
1947         }
1948 }
1949
1950 ## ----------------------------------------------------------------------
1951 ## parse to hash functions
1952
1953 sub parse_date {
1954         my $epoch = shift;
1955         my $tz = shift || "-0000";
1956
1957         my %date;
1958         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1959         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1960         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1961         $date{'hour'} = $hour;
1962         $date{'minute'} = $min;
1963         $date{'mday'} = $mday;
1964         $date{'day'} = $days[$wday];
1965         $date{'month'} = $months[$mon];
1966         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1967                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1968         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1969                              $mday, $months[$mon], $hour ,$min;
1970         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1971                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1972
1973         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1974         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1975         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1976         $date{'hour_local'} = $hour;
1977         $date{'minute_local'} = $min;
1978         $date{'tz_local'} = $tz;
1979         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1980                                   1900+$year, $mon+1, $mday,
1981                                   $hour, $min, $sec, $tz);
1982         return %date;
1983 }
1984
1985 sub parse_tag {
1986         my $tag_id = shift;
1987         my %tag;
1988         my @comment;
1989
1990         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1991         $tag{'id'} = $tag_id;
1992         while (my $line = <$fd>) {
1993                 chomp $line;
1994                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1995                         $tag{'object'} = $1;
1996                 } elsif ($line =~ m/^type (.+)$/) {
1997                         $tag{'type'} = $1;
1998                 } elsif ($line =~ m/^tag (.+)$/) {
1999                         $tag{'name'} = $1;
2000                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2001                         $tag{'author'} = $1;
2002                         $tag{'epoch'} = $2;
2003                         $tag{'tz'} = $3;
2004                 } elsif ($line =~ m/--BEGIN/) {
2005                         push @comment, $line;
2006                         last;
2007                 } elsif ($line eq "") {
2008                         last;
2009                 }
2010         }
2011         push @comment, <$fd>;
2012         $tag{'comment'} = \@comment;
2013         close $fd or return;
2014         if (!defined $tag{'name'}) {
2015                 return
2016         };
2017         return %tag
2018 }
2019
2020 sub parse_commit_text {
2021         my ($commit_text, $withparents) = @_;
2022         my @commit_lines = split '\n', $commit_text;
2023         my %co;
2024
2025         pop @commit_lines; # Remove '\0'
2026
2027         if (! @commit_lines) {
2028                 return;
2029         }
2030
2031         my $header = shift @commit_lines;
2032         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2033                 return;
2034         }
2035         ($co{'id'}, my @parents) = split ' ', $header;
2036         while (my $line = shift @commit_lines) {
2037                 last if $line eq "\n";
2038                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2039                         $co{'tree'} = $1;
2040                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2041                         push @parents, $1;
2042                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2043                         $co{'author'} = $1;
2044                         $co{'author_epoch'} = $2;
2045                         $co{'author_tz'} = $3;
2046                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2047                                 $co{'author_name'}  = $1;
2048                                 $co{'author_email'} = $2;
2049                         } else {
2050                                 $co{'author_name'} = $co{'author'};
2051                         }
2052                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2053                         $co{'committer'} = $1;
2054                         $co{'committer_epoch'} = $2;
2055                         $co{'committer_tz'} = $3;
2056                         $co{'committer_name'} = $co{'committer'};
2057                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2058                                 $co{'committer_name'}  = $1;
2059                                 $co{'committer_email'} = $2;
2060                         } else {
2061                                 $co{'committer_name'} = $co{'committer'};
2062                         }
2063                 }
2064         }
2065         if (!defined $co{'tree'}) {
2066                 return;
2067         };
2068         $co{'parents'} = \@parents;
2069         $co{'parent'} = $parents[0];
2070
2071         foreach my $title (@commit_lines) {
2072                 $title =~ s/^    //;
2073                 if ($title ne "") {
2074                         $co{'title'} = chop_str($title, 80, 5);
2075                         # remove leading stuff of merges to make the interesting part visible
2076                         if (length($title) > 50) {
2077                                 $title =~ s/^Automatic //;
2078                                 $title =~ s/^merge (of|with) /Merge ... /i;
2079                                 if (length($title) > 50) {
2080                                         $title =~ s/(http|rsync):\/\///;
2081                                 }
2082                                 if (length($title) > 50) {
2083                                         $title =~ s/(master|www|rsync)\.//;
2084                                 }
2085                                 if (length($title) > 50) {
2086                                         $title =~ s/kernel.org:?//;
2087                                 }
2088                                 if (length($title) > 50) {
2089                                         $title =~ s/\/pub\/scm//;
2090                                 }
2091                         }
2092                         $co{'title_short'} = chop_str($title, 50, 5);
2093                         last;
2094                 }
2095         }
2096         if ($co{'title'} eq "") {
2097                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2098         }
2099         # remove added spaces
2100         foreach my $line (@commit_lines) {
2101                 $line =~ s/^    //;
2102         }
2103         $co{'comment'} = \@commit_lines;
2104
2105         my $age = time - $co{'committer_epoch'};
2106         $co{'age'} = $age;
2107         $co{'age_string'} = age_string($age);
2108         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2109         if ($age > 60*60*24*7*2) {
2110                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2111                 $co{'age_string_age'} = $co{'age_string'};
2112         } else {
2113                 $co{'age_string_date'} = $co{'age_string'};
2114                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2115         }
2116         return %co;
2117 }
2118
2119 sub parse_commit {
2120         my ($commit_id) = @_;
2121         my %co;
2122
2123         local $/ = "\0";
2124
2125         open my $fd, "-|", git_cmd(), "rev-list",
2126                 "--parents",
2127                 "--header",
2128                 "--max-count=1",
2129                 $commit_id,
2130                 "--",
2131                 or die_error(500, "Open git-rev-list failed");
2132         %co = parse_commit_text(<$fd>, 1);
2133         close $fd;
2134
2135         return %co;
2136 }
2137
2138 sub parse_commits {
2139         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2140         my @cos;
2141
2142         $maxcount ||= 1;
2143         $skip ||= 0;
2144
2145         local $/ = "\0";
2146
2147         open my $fd, "-|", git_cmd(), "rev-list",
2148                 "--header",
2149                 @args,
2150                 ("--max-count=" . $maxcount),
2151                 ("--skip=" . $skip),
2152                 @extra_options,
2153                 $commit_id,
2154                 "--",
2155                 ($filename ? ($filename) : ())
2156                 or die_error(500, "Open git-rev-list failed");
2157         while (my $line = <$fd>) {
2158                 my %co = parse_commit_text($line);
2159                 push @cos, \%co;
2160         }
2161         close $fd;
2162
2163         return wantarray ? @cos : \@cos;
2164 }
2165
2166 # parse line of git-diff-tree "raw" output
2167 sub parse_difftree_raw_line {
2168         my $line = shift;
2169         my %res;
2170
2171         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2172         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2173         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2174                 $res{'from_mode'} = $1;
2175                 $res{'to_mode'} = $2;
2176                 $res{'from_id'} = $3;
2177                 $res{'to_id'} = $4;
2178                 $res{'status'} = $5;
2179                 $res{'similarity'} = $6;
2180                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2181                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2182                 } else {
2183                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2184                 }
2185         }
2186         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2187         # combined diff (for merge commit)
2188         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2189                 $res{'nparents'}  = length($1);
2190                 $res{'from_mode'} = [ split(' ', $2) ];
2191                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2192                 $res{'from_id'} = [ split(' ', $3) ];
2193                 $res{'to_id'} = pop @{$res{'from_id'}};
2194                 $res{'status'} = [ split('', $4) ];
2195                 $res{'to_file'} = unquote($5);
2196         }
2197         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2198         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2199                 $res{'commit'} = $1;
2200         }
2201
2202         return wantarray ? %res : \%res;
2203 }
2204
2205 # wrapper: return parsed line of git-diff-tree "raw" output
2206 # (the argument might be raw line, or parsed info)
2207 sub parsed_difftree_line {
2208         my $line_or_ref = shift;
2209
2210         if (ref($line_or_ref) eq "HASH") {
2211                 # pre-parsed (or generated by hand)
2212                 return $line_or_ref;
2213         } else {
2214                 return parse_difftree_raw_line($line_or_ref);
2215         }
2216 }
2217
2218 # parse line of git-ls-tree output
2219 sub parse_ls_tree_line ($;%) {
2220         my $line = shift;
2221         my %opts = @_;
2222         my %res;
2223
2224         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2225         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2226
2227         $res{'mode'} = $1;
2228         $res{'type'} = $2;
2229         $res{'hash'} = $3;
2230         if ($opts{'-z'}) {
2231                 $res{'name'} = $4;
2232         } else {
2233                 $res{'name'} = unquote($4);
2234         }
2235
2236         return wantarray ? %res : \%res;
2237 }
2238
2239 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2240 sub parse_from_to_diffinfo {
2241         my ($diffinfo, $from, $to, @parents) = @_;
2242
2243         if ($diffinfo->{'nparents'}) {
2244                 # combined diff
2245                 $from->{'file'} = [];
2246                 $from->{'href'} = [];
2247                 fill_from_file_info($diffinfo, @parents)
2248                         unless exists $diffinfo->{'from_file'};
2249                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2250                         $from->{'file'}[$i] =
2251                                 defined $diffinfo->{'from_file'}[$i] ?
2252                                         $diffinfo->{'from_file'}[$i] :
2253                                         $diffinfo->{'to_file'};
2254                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2255                                 $from->{'href'}[$i] = href(action=>"blob",
2256                                                            hash_base=>$parents[$i],
2257                                                            hash=>$diffinfo->{'from_id'}[$i],
2258                                                            file_name=>$from->{'file'}[$i]);
2259                         } else {
2260                                 $from->{'href'}[$i] = undef;
2261                         }
2262                 }
2263         } else {
2264                 # ordinary (not combined) diff
2265                 $from->{'file'} = $diffinfo->{'from_file'};
2266                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2267                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2268                                                hash=>$diffinfo->{'from_id'},
2269                                                file_name=>$from->{'file'});
2270                 } else {
2271                         delete $from->{'href'};
2272                 }
2273         }
2274
2275         $to->{'file'} = $diffinfo->{'to_file'};
2276         if (!is_deleted($diffinfo)) { # file exists in result
2277                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2278                                      hash=>$diffinfo->{'to_id'},
2279                                      file_name=>$to->{'file'});
2280         } else {
2281                 delete $to->{'href'};
2282         }
2283 }
2284
2285 ## ......................................................................
2286 ## parse to array of hashes functions
2287
2288 sub git_get_heads_list {
2289         my $limit = shift;
2290         my @headslist;
2291
2292         open my $fd, '-|', git_cmd(), 'for-each-ref',
2293                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2294                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2295                 'refs/heads'
2296                 or return;
2297         while (my $line = <$fd>) {
2298                 my %ref_item;
2299
2300                 chomp $line;
2301                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2302                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2303                 my ($committer, $epoch, $tz) =
2304                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2305                 $ref_item{'fullname'}  = $name;
2306                 $name =~ s!^refs/heads/!!;
2307
2308                 $ref_item{'name'}  = $name;
2309                 $ref_item{'id'}    = $hash;
2310                 $ref_item{'title'} = $title || '(no commit message)';
2311                 $ref_item{'epoch'} = $epoch;
2312                 if ($epoch) {
2313                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2314                 } else {
2315                         $ref_item{'age'} = "unknown";
2316                 }
2317
2318                 push @headslist, \%ref_item;
2319         }
2320         close $fd;
2321
2322         return wantarray ? @headslist : \@headslist;
2323 }
2324
2325 sub git_get_tags_list {
2326         my $limit = shift;
2327         my @tagslist;
2328
2329         open my $fd, '-|', git_cmd(), 'for-each-ref',
2330                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2331                 '--format=%(objectname) %(objecttype) %(refname) '.
2332                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2333                 'refs/tags'
2334                 or return;
2335         while (my $line = <$fd>) {
2336                 my %ref_item;
2337
2338                 chomp $line;
2339                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2340                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2341                 my ($creator, $epoch, $tz) =
2342                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2343                 $ref_item{'fullname'} = $name;
2344                 $name =~ s!^refs/tags/!!;
2345
2346                 $ref_item{'type'} = $type;
2347                 $ref_item{'id'} = $id;
2348                 $ref_item{'name'} = $name;
2349                 if ($type eq "tag") {
2350                         $ref_item{'subject'} = $title;
2351                         $ref_item{'reftype'} = $reftype;
2352                         $ref_item{'refid'}   = $refid;
2353                 } else {
2354                         $ref_item{'reftype'} = $type;
2355                         $ref_item{'refid'}   = $id;
2356                 }
2357
2358                 if ($type eq "tag" || $type eq "commit") {
2359                         $ref_item{'epoch'} = $epoch;
2360                         if ($epoch) {
2361                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2362                         } else {
2363                                 $ref_item{'age'} = "unknown";
2364                         }
2365                 }
2366
2367                 push @tagslist, \%ref_item;
2368         }
2369         close $fd;
2370
2371         return wantarray ? @tagslist : \@tagslist;
2372 }
2373
2374 ## ----------------------------------------------------------------------
2375 ## filesystem-related functions
2376
2377 sub get_file_owner {
2378         my $path = shift;
2379
2380         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2381         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2382         if (!defined $gcos) {
2383                 return undef;
2384         }
2385         my $owner = $gcos;
2386         $owner =~ s/[,;].*$//;
2387         return to_utf8($owner);
2388 }
2389
2390 ## ......................................................................
2391 ## mimetype related functions
2392
2393 sub mimetype_guess_file {
2394         my $filename = shift;
2395         my $mimemap = shift;
2396         -r $mimemap or return undef;
2397
2398         my %mimemap;
2399         open(MIME, $mimemap) or return undef;
2400         while (<MIME>) {
2401                 next if m/^#/; # skip comments
2402                 my ($mime, $exts) = split(/\t+/);
2403                 if (defined $exts) {
2404                         my @exts = split(/\s+/, $exts);
2405                         foreach my $ext (@exts) {
2406                                 $mimemap{$ext} = $mime;
2407                         }
2408                 }
2409         }
2410         close(MIME);
2411
2412         $filename =~ /\.([^.]*)$/;
2413         return $mimemap{$1};
2414 }
2415
2416 sub mimetype_guess {
2417         my $filename = shift;
2418         my $mime;
2419         $filename =~ /\./ or return undef;
2420
2421         if ($mimetypes_file) {
2422                 my $file = $mimetypes_file;
2423                 if ($file !~ m!^/!) { # if it is relative path
2424                         # it is relative to project
2425                         $file = "$projectroot/$project/$file";
2426                 }
2427                 $mime = mimetype_guess_file($filename, $file);
2428         }
2429         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2430         return $mime;
2431 }
2432
2433 sub blob_mimetype {
2434         my $fd = shift;
2435         my $filename = shift;
2436
2437         if ($filename) {
2438                 my $mime = mimetype_guess($filename);
2439                 $mime and return $mime;
2440         }
2441
2442         # just in case
2443         return $default_blob_plain_mimetype unless $fd;
2444
2445         if (-T $fd) {
2446                 return 'text/plain';
2447         } elsif (! $filename) {
2448                 return 'application/octet-stream';
2449         } elsif ($filename =~ m/\.png$/i) {
2450                 return 'image/png';
2451         } elsif ($filename =~ m/\.gif$/i) {
2452                 return 'image/gif';
2453         } elsif ($filename =~ m/\.jpe?g$/i) {
2454                 return 'image/jpeg';
2455         } else {
2456                 return 'application/octet-stream';
2457         }
2458 }
2459
2460 sub blob_contenttype {
2461         my ($fd, $file_name, $type) = @_;
2462
2463         $type ||= blob_mimetype($fd, $file_name);
2464         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2465                 $type .= "; charset=$default_text_plain_charset";
2466         }
2467
2468         return $type;
2469 }
2470
2471 ## ======================================================================
2472 ## functions printing HTML: header, footer, error page
2473
2474 sub git_header_html {
2475         my $status = shift || "200 OK";
2476         my $expires = shift;
2477
2478         my $title = "$site_name";
2479         if (defined $project) {
2480                 $title .= " - " . to_utf8($project);
2481                 if (defined $action) {
2482                         $title .= "/$action";
2483                         if (defined $file_name) {
2484                                 $title .= " - " . esc_path($file_name);
2485                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2486                                         $title .= "/";
2487                                 }
2488                         }
2489                 }
2490         }
2491         my $content_type;
2492         # require explicit support from the UA if we are to send the page as
2493         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2494         # we have to do this because MSIE sometimes globs '*/*', pretending to
2495         # support xhtml+xml but choking when it gets what it asked for.
2496         if (defined $cgi->http('HTTP_ACCEPT') &&
2497             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2498             $cgi->Accept('application/xhtml+xml') != 0) {
2499                 $content_type = 'application/xhtml+xml';
2500         } else {
2501                 $content_type = 'text/html';
2502         }
2503         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2504                            -status=> $status, -expires => $expires);
2505         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2506         print <<EOF;
2507 <?xml version="1.0" encoding="utf-8"?>
2508 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2509 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2510 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2511 <!-- git core binaries version $git_version -->
2512 <head>
2513 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2514 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2515 <meta name="robots" content="index, nofollow"/>
2516 <title>$title</title>
2517 EOF
2518 # print out each stylesheet that exist
2519         if (defined $stylesheet) {
2520 #provides backwards capability for those people who define style sheet in a config file
2521                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2522         } else {
2523                 foreach my $stylesheet (@stylesheets) {
2524                         next unless $stylesheet;
2525                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2526                 }
2527         }
2528         if (defined $project) {
2529                 my %href_params = get_feed_info();
2530                 if (!exists $href_params{'-title'}) {
2531                         $href_params{'-title'} = 'log';
2532                 }
2533
2534                 foreach my $format qw(RSS Atom) {
2535                         my $type = lc($format);
2536                         my %link_attr = (
2537                                 '-rel' => 'alternate',
2538                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2539                                 '-type' => "application/$type+xml"
2540                         );
2541
2542                         $href_params{'action'} = $type;
2543                         $link_attr{'-href'} = href(%href_params);
2544                         print "<link ".
2545                               "rel=\"$link_attr{'-rel'}\" ".
2546                               "title=\"$link_attr{'-title'}\" ".
2547                               "href=\"$link_attr{'-href'}\" ".
2548                               "type=\"$link_attr{'-type'}\" ".
2549                               "/>\n";
2550
2551                         $href_params{'extra_options'} = '--no-merges';
2552                         $link_attr{'-href'} = href(%href_params);
2553                         $link_attr{'-title'} .= ' (no merges)';
2554                         print "<link ".
2555                               "rel=\"$link_attr{'-rel'}\" ".
2556                               "title=\"$link_attr{'-title'}\" ".
2557                               "href=\"$link_attr{'-href'}\" ".
2558                               "type=\"$link_attr{'-type'}\" ".
2559                               "/>\n";
2560                 }
2561
2562         } else {
2563                 printf('<link rel="alternate" title="%s projects list" '.
2564                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2565                        $site_name, href(project=>undef, action=>"project_index"));
2566                 printf('<link rel="alternate" title="%s projects feeds" '.
2567                        'href="%s" type="text/x-opml" />'."\n",
2568                        $site_name, href(project=>undef, action=>"opml"));
2569         }
2570         if (defined $favicon) {
2571                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2572         }
2573
2574         print "</head>\n" .
2575               "<body>\n";
2576
2577         if (-f $site_header) {
2578                 open (my $fd, $site_header);
2579                 print <$fd>;
2580                 close $fd;
2581         }
2582
2583         print "<div class=\"page_header\">\n" .
2584               $cgi->a({-href => esc_url($logo_url),
2585                        -title => $logo_label},
2586                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2587         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2588         if (defined $project) {
2589                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2590                 if (defined $action) {
2591                         print " / $action";
2592                 }
2593                 print "\n";
2594         }
2595         print "</div>\n";
2596
2597         my ($have_search) = gitweb_check_feature('search');
2598         if (defined $project && $have_search) {
2599                 if (!defined $searchtext) {
2600                         $searchtext = "";
2601                 }
2602                 my $search_hash;
2603                 if (defined $hash_base) {
2604                         $search_hash = $hash_base;
2605                 } elsif (defined $hash) {
2606                         $search_hash = $hash;
2607                 } else {
2608                         $search_hash = "HEAD";
2609                 }
2610                 my $action = $my_uri;
2611                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2612                 if ($use_pathinfo) {
2613                         $action .= "/".esc_url($project);
2614                 }
2615                 print $cgi->startform(-method => "get", -action => $action) .
2616                       "<div class=\"search\">\n" .
2617                       (!$use_pathinfo &&
2618                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2619                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2620                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2621                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2622                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2623                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2624                       " search:\n",
2625                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2626                       "<span title=\"Extended regular expression\">" .
2627                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2628                                      -checked => $search_use_regexp) .
2629                       "</span>" .
2630                       "</div>" .
2631                       $cgi->end_form() . "\n";
2632         }
2633 }
2634
2635 sub git_footer_html {
2636         my $feed_class = 'rss_logo';
2637
2638         print "<div class=\"page_footer\">\n";
2639         if (defined $project) {
2640                 my $descr = git_get_project_description($project);
2641                 if (defined $descr) {
2642                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2643                 }
2644
2645                 my %href_params = get_feed_info();
2646                 if (!%href_params) {
2647                         $feed_class .= ' generic';
2648                 }
2649                 $href_params{'-title'} ||= 'log';
2650
2651                 foreach my $format qw(RSS Atom) {
2652                         $href_params{'action'} = lc($format);
2653                         print $cgi->a({-href => href(%href_params),
2654                                       -title => "$href_params{'-title'} $format feed",
2655                                       -class => $feed_class}, $format)."\n";
2656                 }
2657
2658         } else {
2659                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2660                               -class => $feed_class}, "OPML") . " ";
2661                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2662                               -class => $feed_class}, "TXT") . "\n";
2663         }
2664         print "</div>\n"; # class="page_footer"
2665
2666         if (-f $site_footer) {
2667                 open (my $fd, $site_footer);
2668                 print <$fd>;
2669                 close $fd;
2670         }
2671
2672         print "</body>\n" .
2673               "</html>";
2674 }
2675
2676 # die_error(<http_status_code>, <error_message>)
2677 # Example: die_error(404, 'Hash not found')
2678 # By convention, use the following status codes (as defined in RFC 2616):
2679 # 400: Invalid or missing CGI parameters, or
2680 #      requested object exists but has wrong type.
2681 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2682 #      this server or project.
2683 # 404: Requested object/revision/project doesn't exist.
2684 # 500: The server isn't configured properly, or
2685 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2686 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2687 sub die_error {
2688         my $status = shift || 500;
2689         my $error = shift || "Internal server error";
2690
2691         my %http_responses = (400 => '400 Bad Request',
2692                               403 => '403 Forbidden',
2693                               404 => '404 Not Found',
2694                               500 => '500 Internal Server Error');
2695         git_header_html($http_responses{$status});
2696         print <<EOF;
2697 <div class="page_body">
2698 <br /><br />
2699 $status - $error
2700 <br />
2701 </div>
2702 EOF
2703         git_footer_html();
2704         exit;
2705 }
2706
2707 ## ----------------------------------------------------------------------
2708 ## functions printing or outputting HTML: navigation
2709
2710 sub git_print_page_nav {
2711         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2712         $extra = '' if !defined $extra; # pager or formats
2713
2714         my @navs = qw(summary shortlog log commit commitdiff tree);
2715         if ($suppress) {
2716                 @navs = grep { $_ ne $suppress } @navs;
2717         }
2718
2719         my %arg = map { $_ => {action=>$_} } @navs;
2720         if (defined $head) {
2721                 for (qw(commit commitdiff)) {
2722                         $arg{$_}{'hash'} = $head;
2723                 }
2724                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2725                         for (qw(shortlog log)) {
2726                                 $arg{$_}{'hash'} = $head;
2727                         }
2728                 }
2729         }
2730         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2731         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2732
2733         print "<div class=\"page_nav\">\n" .
2734                 (join " | ",
2735                  map { $_ eq $current ?
2736                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2737                  } @navs);
2738         print "<br/>\n$extra<br/>\n" .
2739               "</div>\n";
2740 }
2741
2742 sub format_paging_nav {
2743         my ($action, $hash, $head, $page, $has_next_link) = @_;
2744         my $paging_nav;
2745
2746
2747         if ($hash ne $head || $page) {
2748                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2749         } else {
2750                 $paging_nav .= "HEAD";
2751         }
2752
2753         if ($page > 0) {
2754                 $paging_nav .= " &sdot; " .
2755                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2756                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2757         } else {
2758                 $paging_nav .= " &sdot; prev";
2759         }
2760
2761         if ($has_next_link) {
2762                 $paging_nav .= " &sdot; " .
2763                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2764                                  -accesskey => "n", -title => "Alt-n"}, "next");
2765         } else {
2766                 $paging_nav .= " &sdot; next";
2767         }
2768
2769         return $paging_nav;
2770 }
2771
2772 ## ......................................................................
2773 ## functions printing or outputting HTML: div
2774
2775 sub git_print_header_div {
2776         my ($action, $title, $hash, $hash_base) = @_;
2777         my %args = ();
2778
2779         $args{'action'} = $action;
2780         $args{'hash'} = $hash if $hash;
2781         $args{'hash_base'} = $hash_base if $hash_base;
2782
2783         print "<div class=\"header\">\n" .
2784               $cgi->a({-href => href(%args), -class => "title"},
2785               $title ? $title : $action) .
2786               "\n</div>\n";
2787 }
2788
2789 #sub git_print_authorship (\%) {
2790 sub git_print_authorship {
2791         my $co = shift;
2792
2793         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2794         print "<div class=\"author_date\">" .
2795               esc_html($co->{'author_name'}) .
2796               " [$ad{'rfc2822'}";
2797         if ($ad{'hour_local'} < 6) {
2798                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2799                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2800         } else {
2801                 printf(" (%02d:%02d %s)",
2802                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2803         }
2804         print "]</div>\n";
2805 }
2806
2807 sub git_print_page_path {
2808         my $name = shift;
2809         my $type = shift;
2810         my $hb = shift;
2811
2812
2813         print "<div class=\"page_path\">";
2814         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2815                       -title => 'tree root'}, to_utf8("[$project]"));
2816         print " / ";
2817         if (defined $name) {
2818                 my @dirname = split '/', $name;
2819                 my $basename = pop @dirname;
2820                 my $fullname = '';
2821
2822                 foreach my $dir (@dirname) {
2823                         $fullname .= ($fullname ? '/' : '') . $dir;
2824                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2825                                                      hash_base=>$hb),
2826                                       -title => $fullname}, esc_path($dir));
2827                         print " / ";
2828                 }
2829                 if (defined $type && $type eq 'blob') {
2830                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2831                                                      hash_base=>$hb),
2832                                       -title => $name}, esc_path($basename));
2833                 } elsif (defined $type && $type eq 'tree') {
2834                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2835                                                      hash_base=>$hb),
2836                                       -title => $name}, esc_path($basename));
2837                         print " / ";
2838                 } else {
2839                         print esc_path($basename);
2840                 }
2841         }
2842         print "<br/></div>\n";
2843 }
2844
2845 # sub git_print_log (\@;%) {
2846 sub git_print_log ($;%) {
2847         my $log = shift;
2848         my %opts = @_;
2849
2850         if ($opts{'-remove_title'}) {
2851                 # remove title, i.e. first line of log
2852                 shift @$log;
2853         }
2854         # remove leading empty lines
2855         while (defined $log->[0] && $log->[0] eq "") {
2856                 shift @$log;
2857         }
2858
2859         # print log
2860         my $signoff = 0;
2861         my $empty = 0;
2862         foreach my $line (@$log) {
2863                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2864                         $signoff = 1;
2865                         $empty = 0;
2866                         if (! $opts{'-remove_signoff'}) {
2867                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2868                                 next;
2869                         } else {
2870                                 # remove signoff lines
2871                                 next;
2872                         }
2873                 } else {
2874                         $signoff = 0;
2875                 }
2876
2877                 # print only one empty line
2878                 # do not print empty line after signoff
2879                 if ($line eq "") {
2880                         next if ($empty || $signoff);
2881                         $empty = 1;
2882                 } else {
2883                         $empty = 0;
2884                 }
2885
2886                 print format_log_line_html($line) . "<br/>\n";
2887         }
2888
2889         if ($opts{'-final_empty_line'}) {
2890                 # end with single empty line
2891                 print "<br/>\n" unless $empty;
2892         }
2893 }
2894
2895 # return link target (what link points to)
2896 sub git_get_link_target {
2897         my $hash = shift;
2898         my $link_target;
2899
2900         # read link
2901         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2902                 or return;
2903         {
2904                 local $/;
2905                 $link_target = <$fd>;
2906         }
2907         close $fd
2908                 or return;
2909
2910         return $link_target;
2911 }
2912
2913 # given link target, and the directory (basedir) the link is in,
2914 # return target of link relative to top directory (top tree);
2915 # return undef if it is not possible (including absolute links).
2916 sub normalize_link_target {
2917         my ($link_target, $basedir, $hash_base) = @_;
2918
2919         # we can normalize symlink target only if $hash_base is provided
2920         return unless $hash_base;
2921
2922         # absolute symlinks (beginning with '/') cannot be normalized
2923         return if (substr($link_target, 0, 1) eq '/');
2924
2925         # normalize link target to path from top (root) tree (dir)
2926         my $path;
2927         if ($basedir) {
2928                 $path = $basedir . '/' . $link_target;
2929         } else {
2930                 # we are in top (root) tree (dir)
2931                 $path = $link_target;
2932         }
2933
2934         # remove //, /./, and /../
2935         my @path_parts;
2936         foreach my $part (split('/', $path)) {
2937                 # discard '.' and ''
2938                 next if (!$part || $part eq '.');
2939                 # handle '..'
2940                 if ($part eq '..') {
2941                         if (@path_parts) {
2942                                 pop @path_parts;
2943                         } else {
2944                                 # link leads outside repository (outside top dir)
2945                                 return;
2946                         }
2947                 } else {
2948                         push @path_parts, $part;
2949                 }
2950         }
2951         $path = join('/', @path_parts);
2952
2953         return $path;
2954 }
2955
2956 # print tree entry (row of git_tree), but without encompassing <tr> element
2957 sub git_print_tree_entry {
2958         my ($t, $basedir, $hash_base, $have_blame) = @_;
2959
2960         my %base_key = ();
2961         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2962
2963         # The format of a table row is: mode list link.  Where mode is
2964         # the mode of the entry, list is the name of the entry, an href,
2965         # and link is the action links of the entry.
2966
2967         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2968         if ($t->{'type'} eq "blob") {
2969                 print "<td class=\"list\">" .
2970                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2971                                                file_name=>"$basedir$t->{'name'}", %base_key),
2972                                 -class => "list"}, esc_path($t->{'name'}));
2973                 if (S_ISLNK(oct $t->{'mode'})) {
2974                         my $link_target = git_get_link_target($t->{'hash'});
2975                         if ($link_target) {
2976                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2977                                 if (defined $norm_target) {
2978                                         print " -> " .
2979                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2980                                                                      file_name=>$norm_target),
2981                                                        -title => $norm_target}, esc_path($link_target));
2982                                 } else {
2983                                         print " -> " . esc_path($link_target);
2984                                 }
2985                         }
2986                 }
2987                 print "</td>\n";
2988                 print "<td class=\"link\">";
2989                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2990                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2991                               "blob");
2992                 if ($have_blame) {
2993                         print " | " .
2994                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2995                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2996                                       "blame");
2997                 }
2998                 if (defined $hash_base) {
2999                         print " | " .
3000                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3001                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3002                                       "history");
3003                 }
3004                 print " | " .
3005                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3006                                                file_name=>"$basedir$t->{'name'}")},
3007                                 "raw");
3008                 print "</td>\n";
3009
3010         } elsif ($t->{'type'} eq "tree") {
3011                 print "<td class=\"list\">";
3012                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3013                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3014                               esc_path($t->{'name'}));
3015                 print "</td>\n";
3016                 print "<td class=\"link\">";
3017                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3018                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3019                               "tree");
3020                 if (defined $hash_base) {
3021                         print " | " .
3022                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3023                                                      file_name=>"$basedir$t->{'name'}")},
3024                                       "history");
3025                 }
3026                 print "</td>\n";
3027         } else {
3028                 # unknown object: we can only present history for it
3029                 # (this includes 'commit' object, i.e. submodule support)
3030                 print "<td class=\"list\">" .
3031                       esc_path($t->{'name'}) .
3032                       "</td>\n";
3033                 print "<td class=\"link\">";
3034                 if (defined $hash_base) {
3035                         print $cgi->a({-href => href(action=>"history",
3036                                                      hash_base=>$hash_base,
3037                                                      file_name=>"$basedir$t->{'name'}")},
3038                                       "history");
3039                 }
3040                 print "</td>\n";
3041         }
3042 }
3043
3044 ## ......................................................................
3045 ## functions printing large fragments of HTML
3046
3047 # get pre-image filenames for merge (combined) diff
3048 sub fill_from_file_info {
3049         my ($diff, @parents) = @_;
3050
3051         $diff->{'from_file'} = [ ];
3052         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3053         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3054                 if ($diff->{'status'}[$i] eq 'R' ||
3055                     $diff->{'status'}[$i] eq 'C') {
3056                         $diff->{'from_file'}[$i] =
3057                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3058                 }
3059         }
3060
3061         return $diff;
3062 }
3063
3064 # is current raw difftree line of file deletion
3065 sub is_deleted {
3066         my $diffinfo = shift;
3067
3068         return $diffinfo->{'to_id'} eq ('0' x 40);
3069 }
3070
3071 # does patch correspond to [previous] difftree raw line
3072 # $diffinfo  - hashref of parsed raw diff format
3073 # $patchinfo - hashref of parsed patch diff format
3074 #              (the same keys as in $diffinfo)
3075 sub is_patch_split {
3076         my ($diffinfo, $patchinfo) = @_;
3077
3078         return defined $diffinfo && defined $patchinfo
3079                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3080 }
3081
3082
3083 sub git_difftree_body {
3084         my ($difftree, $hash, @parents) = @_;
3085         my ($parent) = $parents[0];
3086         my ($have_blame) = gitweb_check_feature('blame');
3087         print "<div class=\"list_head\">\n";
3088         if ($#{$difftree} > 10) {
3089                 print(($#{$difftree} + 1) . " files changed:\n");
3090         }
3091         print "</div>\n";
3092
3093         print "<table class=\"" .
3094               (@parents > 1 ? "combined " : "") .
3095               "diff_tree\">\n";
3096
3097         # header only for combined diff in 'commitdiff' view
3098         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3099         if ($has_header) {
3100                 # table header
3101                 print "<thead><tr>\n" .
3102                        "<th></th><th></th>\n"; # filename, patchN link
3103                 for (my $i = 0; $i < @parents; $i++) {
3104                         my $par = $parents[$i];
3105                         print "<th>" .
3106                               $cgi->a({-href => href(action=>"commitdiff",
3107                                                      hash=>$hash, hash_parent=>$par),
3108                                        -title => 'commitdiff to parent number ' .
3109                                                   ($i+1) . ': ' . substr($par,0,7)},
3110                                       $i+1) .
3111                               "&nbsp;</th>\n";
3112                 }
3113                 print "</tr></thead>\n<tbody>\n";
3114         }
3115
3116         my $alternate = 1;
3117         my $patchno = 0;
3118         foreach my $line (@{$difftree}) {
3119                 my $diff = parsed_difftree_line($line);
3120
3121                 if ($alternate) {
3122                         print "<tr class=\"dark\">\n";
3123                 } else {
3124                         print "<tr class=\"light\">\n";
3125                 }
3126                 $alternate ^= 1;
3127
3128                 if (exists $diff->{'nparents'}) { # combined diff
3129
3130                         fill_from_file_info($diff, @parents)
3131                                 unless exists $diff->{'from_file'};
3132
3133                         if (!is_deleted($diff)) {
3134                                 # file exists in the result (child) commit
3135                                 print "<td>" .
3136                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3137                                                              file_name=>$diff->{'to_file'},
3138                                                              hash_base=>$hash),
3139                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3140                                       "</td>\n";
3141                         } else {
3142                                 print "<td>" .
3143                                       esc_path($diff->{'to_file'}) .
3144                                       "</td>\n";
3145                         }
3146
3147                         if ($action eq 'commitdiff') {
3148                                 # link to patch
3149                                 $patchno++;
3150                                 print "<td class=\"link\">" .
3151                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3152                                       " | " .
3153                                       "</td>\n";
3154                         }
3155
3156                         my $has_history = 0;
3157                         my $not_deleted = 0;
3158                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3159                                 my $hash_parent = $parents[$i];
3160                                 my $from_hash = $diff->{'from_id'}[$i];
3161                                 my $from_path = $diff->{'from_file'}[$i];
3162                                 my $status = $diff->{'status'}[$i];
3163
3164                                 $has_history ||= ($status ne 'A');
3165                                 $not_deleted ||= ($status ne 'D');
3166
3167                                 if ($status eq 'A') {
3168                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3169                                 } elsif ($status eq 'D') {
3170                                         print "<td class=\"link\">" .
3171                                               $cgi->a({-href => href(action=>"blob",
3172                                                                      hash_base=>$hash,
3173                                                                      hash=>$from_hash,
3174                                                                      file_name=>$from_path)},
3175                                                       "blob" . ($i+1)) .
3176                                               " | </td>\n";
3177                                 } else {
3178                                         if ($diff->{'to_id'} eq $from_hash) {
3179                                                 print "<td class=\"link nochange\">";
3180                                         } else {
3181                                                 print "<td class=\"link\">";
3182                                         }
3183                                         print $cgi->a({-href => href(action=>"blobdiff",
3184                                                                      hash=>$diff->{'to_id'},
3185                                                                      hash_parent=>$from_hash,
3186                                                                      hash_base=>$hash,
3187                                                                      hash_parent_base=>$hash_parent,
3188                                                                      file_name=>$diff->{'to_file'},
3189                                                                      file_parent=>$from_path)},
3190                                                       "diff" . ($i+1)) .
3191                                               " | </td>\n";
3192                                 }
3193                         }
3194
3195                         print "<td class=\"link\">";
3196                         if ($not_deleted) {
3197                                 print $cgi->a({-href => href(action=>"blob",
3198                                                              hash=>$diff->{'to_id'},
3199                                                              file_name=>$diff->{'to_file'},
3200                                                              hash_base=>$hash)},
3201                                               "blob");
3202                                 print " | " if ($has_history);
3203                         }
3204                         if ($has_history) {
3205                                 print $cgi->a({-href => href(action=>"history",
3206                                                              file_name=>$diff->{'to_file'},
3207                                                              hash_base=>$hash)},
3208                                               "history");
3209                         }
3210                         print "</td>\n";
3211
3212                         print "</tr>\n";
3213                         next; # instead of 'else' clause, to avoid extra indent
3214                 }
3215                 # else ordinary diff
3216
3217                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3218                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3219                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3220                         $to_mode_oct = oct $diff->{'to_mode'};
3221                         if (S_ISREG($to_mode_oct)) { # only for regular file
3222                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3223                         }
3224                         $to_file_type = file_type($diff->{'to_mode'});
3225                 }
3226                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3227                         $from_mode_oct = oct $diff->{'from_mode'};
3228                         if (S_ISREG($to_mode_oct)) { # only for regular file
3229                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3230                         }
3231                         $from_file_type = file_type($diff->{'from_mode'});
3232                 }
3233
3234                 if ($diff->{'status'} eq "A") { # created
3235                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3236                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3237                         $mode_chng   .= "]</span>";
3238                         print "<td>";
3239                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3240                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3241                                       -class => "list"}, esc_path($diff->{'file'}));
3242                         print "</td>\n";
3243                         print "<td>$mode_chng</td>\n";
3244                         print "<td class=\"link\">";
3245                         if ($action eq 'commitdiff') {
3246                                 # link to patch
3247                                 $patchno++;
3248                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3249                                 print " | ";
3250                         }
3251                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3252                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3253                                       "blob");
3254                         print "</td>\n";
3255
3256                 } elsif ($diff->{'status'} eq "D") { # deleted
3257                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3258                         print "<td>";
3259                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3260                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3261                                        -class => "list"}, esc_path($diff->{'file'}));
3262                         print "</td>\n";
3263                         print "<td>$mode_chng</td>\n";
3264                         print "<td class=\"link\">";
3265                         if ($action eq 'commitdiff') {
3266                                 # link to patch
3267                                 $patchno++;
3268                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3269                                 print " | ";
3270                         }
3271                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3272                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3273                                       "blob") . " | ";
3274                         if ($have_blame) {
3275                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3276                                                              file_name=>$diff->{'file'})},
3277                                               "blame") . " | ";
3278                         }
3279                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3280                                                      file_name=>$diff->{'file'})},
3281                                       "history");
3282                         print "</td>\n";
3283
3284                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3285                         my $mode_chnge = "";
3286                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3287                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3288                                 if ($from_file_type ne $to_file_type) {
3289                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3290                                 }
3291                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3292                                         if ($from_mode_str && $to_mode_str) {
3293                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3294                                         } elsif ($to_mode_str) {
3295                                                 $mode_chnge .= " mode: $to_mode_str";
3296                                         }
3297                                 }
3298                                 $mode_chnge .= "]</span>\n";
3299                         }
3300                         print "<td>";
3301                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3302                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3303                                       -class => "list"}, esc_path($diff->{'file'}));
3304                         print "</td>\n";
3305                         print "<td>$mode_chnge</td>\n";
3306                         print "<td class=\"link\">";
3307                         if ($action eq 'commitdiff') {
3308                                 # link to patch
3309                                 $patchno++;
3310                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3311                                       " | ";
3312                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3313                                 # "commit" view and modified file (not onlu mode changed)
3314                                 print $cgi->a({-href => href(action=>"blobdiff",
3315                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3316                                                              hash_base=>$hash, hash_parent_base=>$parent,
3317                                                              file_name=>$diff->{'file'})},
3318                                               "diff") .
3319                                       " | ";
3320                         }
3321                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3322                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3323                                        "blob") . " | ";
3324                         if ($have_blame) {
3325                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3326                                                              file_name=>$diff->{'file'})},
3327                                               "blame") . " | ";
3328                         }
3329                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3330                                                      file_name=>$diff->{'file'})},
3331                                       "history");
3332                         print "</td>\n";
3333
3334                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3335                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3336                         my $nstatus = $status_name{$diff->{'status'}};
3337                         my $mode_chng = "";
3338                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3339                                 # mode also for directories, so we cannot use $to_mode_str
3340                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3341                         }
3342                         print "<td>" .
3343                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3344                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3345                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3346                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3347                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3348                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3349                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3350                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3351                               "<td class=\"link\">";
3352                         if ($action eq 'commitdiff') {
3353                                 # link to patch
3354                                 $patchno++;
3355                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3356                                       " | ";
3357                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3358                                 # "commit" view and modified file (not only pure rename or copy)
3359                                 print $cgi->a({-href => href(action=>"blobdiff",
3360                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3361                                                              hash_base=>$hash, hash_parent_base=>$parent,
3362                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3363                                               "diff") .
3364                                       " | ";
3365                         }
3366                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3367                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3368                                       "blob") . " | ";
3369                         if ($have_blame) {
3370                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3371                                                              file_name=>$diff->{'to_file'})},
3372                                               "blame") . " | ";
3373                         }
3374                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3375                                                     file_name=>$diff->{'to_file'})},
3376                                       "history");
3377                         print "</td>\n";
3378
3379                 } # we should not encounter Unmerged (U) or Unknown (X) status
3380                 print "</tr>\n";
3381         }
3382         print "</tbody>" if $has_header;
3383         print "</table>\n";
3384 }
3385
3386 sub git_patchset_body {
3387         my ($fd, $difftree, $hash, @hash_parents) = @_;
3388         my ($hash_parent) = $hash_parents[0];
3389
3390         my $is_combined = (@hash_parents > 1);
3391         my $patch_idx = 0;
3392         my $patch_number = 0;
3393         my $patch_line;
3394         my $diffinfo;
3395         my $to_name;
3396         my (%from, %to);
3397
3398         print "<div class=\"patchset\">\n";
3399
3400         # skip to first patch
3401         while ($patch_line = <$fd>) {
3402                 chomp $patch_line;
3403
3404                 last if ($patch_line =~ m/^diff /);
3405         }
3406
3407  PATCH:
3408         while ($patch_line) {
3409
3410                 # parse "git diff" header line
3411                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3412                         # $1 is from_name, which we do not use
3413                         $to_name = unquote($2);
3414                         $to_name =~ s!^b/!!;
3415                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3416                         # $1 is 'cc' or 'combined', which we do not use
3417                         $to_name = unquote($2);
3418                 } else {
3419                         $to_name = undef;
3420                 }
3421
3422                 # check if current patch belong to current raw line
3423                 # and parse raw git-diff line if needed
3424                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3425                         # this is continuation of a split patch
3426                         print "<div class=\"patch cont\">\n";
3427                 } else {
3428                         # advance raw git-diff output if needed
3429                         $patch_idx++ if defined $diffinfo;
3430
3431                         # read and prepare patch information
3432                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3433
3434                         # compact combined diff output can have some patches skipped
3435                         # find which patch (using pathname of result) we are at now;
3436                         if ($is_combined) {
3437                                 while ($to_name ne $diffinfo->{'to_file'}) {
3438                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3439                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3440                                               "</div>\n";  # class="patch"
3441
3442                                         $patch_idx++;
3443                                         $patch_number++;
3444
3445                                         last if $patch_idx > $#$difftree;
3446                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3447                                 }
3448                         }
3449
3450                         # modifies %from, %to hashes
3451                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3452
3453                         # this is first patch for raw difftree line with $patch_idx index
3454                         # we index @$difftree array from 0, but number patches from 1
3455                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3456                 }
3457
3458                 # git diff header
3459                 #assert($patch_line =~ m/^diff /) if DEBUG;
3460                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3461                 $patch_number++;
3462                 # print "git diff" header
3463                 print format_git_diff_header_line($patch_line, $diffinfo,
3464                                                   \%from, \%to);
3465
3466                 # print extended diff header
3467                 print "<div class=\"diff extended_header\">\n";
3468         EXTENDED_HEADER:
3469                 while ($patch_line = <$fd>) {
3470                         chomp $patch_line;
3471
3472                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3473
3474                         print format_extended_diff_header_line($patch_line, $diffinfo,
3475                                                                \%from, \%to);
3476                 }
3477                 print "</div>\n"; # class="diff extended_header"
3478
3479                 # from-file/to-file diff header
3480                 if (! $patch_line) {
3481                         print "</div>\n"; # class="patch"
3482                         last PATCH;
3483                 }
3484                 next PATCH if ($patch_line =~ m/^diff /);
3485                 #assert($patch_line =~ m/^---/) if DEBUG;
3486
3487                 my $last_patch_line = $patch_line;
3488                 $patch_line = <$fd>;
3489                 chomp $patch_line;
3490                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3491
3492                 print format_diff_from_to_header($last_patch_line, $patch_line,
3493                                                  $diffinfo, \%from, \%to,
3494                                                  @hash_parents);
3495
3496                 # the patch itself
3497         LINE:
3498                 while ($patch_line = <$fd>) {
3499                         chomp $patch_line;
3500
3501                         next PATCH if ($patch_line =~ m/^diff /);
3502
3503                         print format_diff_line($patch_line, \%from, \%to);
3504                 }
3505
3506         } continue {
3507                 print "</div>\n"; # class="patch"
3508         }
3509
3510         # for compact combined (--cc) format, with chunk and patch simpliciaction
3511         # patchset might be empty, but there might be unprocessed raw lines
3512         for (++$patch_idx if $patch_number > 0;
3513              $patch_idx < @$difftree;
3514              ++$patch_idx) {
3515                 # read and prepare patch information
3516                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3517
3518                 # generate anchor for "patch" links in difftree / whatchanged part
3519                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3520                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3521                       "</div>\n";  # class="patch"
3522
3523                 $patch_number++;
3524         }
3525
3526         if ($patch_number == 0) {
3527                 if (@hash_parents > 1) {
3528                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3529                 } else {
3530                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3531                 }
3532         }
3533
3534         print "</div>\n"; # class="patchset"
3535 }
3536
3537 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3538
3539 # fills project list info (age, description, owner, forks) for each
3540 # project in the list, removing invalid projects from returned list
3541 # NOTE: modifies $projlist, but does not remove entries from it
3542 sub fill_project_list_info {
3543         my ($projlist, $check_forks) = @_;
3544         my @projects;
3545
3546  PROJECT:
3547         foreach my $pr (@$projlist) {
3548                 my (@activity) = git_get_last_activity($pr->{'path'});
3549                 unless (@activity) {
3550                         next PROJECT;
3551                 }
3552                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3553                 if (!defined $pr->{'descr'}) {
3554                         my $descr = git_get_project_description($pr->{'path'}) || "";
3555                         $descr = to_utf8($descr);
3556                         $pr->{'descr_long'} = $descr;
3557                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3558                 }
3559                 if (!defined $pr->{'owner'}) {
3560                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3561                 }
3562                 if ($check_forks) {
3563                         my $pname = $pr->{'path'};
3564                         if (($pname =~ s/\.git$//) &&
3565                             ($pname !~ /\/$/) &&
3566                             (-d "$projectroot/$pname")) {
3567                                 $pr->{'forks'} = "-d $projectroot/$pname";
3568                         }       else {
3569                                 $pr->{'forks'} = 0;
3570                         }
3571                 }
3572                 push @projects, $pr;
3573         }
3574
3575         return @projects;
3576 }
3577
3578 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3579 # (changing $list), or generating 'sort by $name' replay link otherwise
3580 sub print_sort_th {
3581         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3582         $key    ||= $name;
3583         $header ||= ucfirst($name);
3584
3585         if ($order eq $name) {
3586                 if ($str_sort) {
3587                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3588                 } else {
3589                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3590                 }
3591                 print "<th>$header</th>\n";
3592         } else {
3593                 print "<th>" .
3594                       $cgi->a({-href => href(-replay=>1, order=>$name),
3595                                -class => "header"}, $header) .
3596                       "</th>\n";
3597         }
3598 }
3599
3600 sub print_sort_th_str {
3601         print_sort_th(1, @_);
3602 }
3603
3604 sub print_sort_th_num {
3605         print_sort_th(0, @_);
3606 }
3607
3608 sub git_project_list_body {
3609         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3610
3611         my ($check_forks) = gitweb_check_feature('forks');
3612         my @projects = fill_project_list_info($projlist, $check_forks);
3613
3614         $order ||= $default_projects_order;
3615         $from = 0 unless defined $from;
3616         $to = $#projects if (!defined $to || $#projects < $to);
3617
3618         print "<table class=\"project_list\">\n";
3619         unless ($no_header) {
3620                 print "<tr>\n";
3621                 if ($check_forks) {
3622                         print "<th></th>\n";
3623                 }
3624                 print_sort_th_str('project', $order, 'path',
3625                                   'Project', \@projects);
3626                 print_sort_th_str('descr', $order, 'descr_long',
3627                                   'Description', \@projects);
3628                 print_sort_th_str('owner', $order, 'owner',
3629                                   'Owner', \@projects);
3630                 print_sort_th_num('age', $order, 'age',
3631                                   'Last Change', \@projects);
3632                 print "<th></th>\n" . # for links
3633                       "</tr>\n";
3634         }
3635         my $alternate = 1;
3636         for (my $i = $from; $i <= $to; $i++) {
3637                 my $pr = $projects[$i];
3638                 if ($alternate) {
3639                         print "<tr class=\"dark\">\n";
3640                 } else {
3641                         print "<tr class=\"light\">\n";
3642                 }
3643                 $alternate ^= 1;
3644                 if ($check_forks) {
3645                         print "<td>";
3646                         if ($pr->{'forks'}) {
3647                                 print "<!-- $pr->{'forks'} -->\n";
3648                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3649                         }
3650                         print "</td>\n";
3651                 }
3652                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3653                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3654                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3655                                         -class => "list", -title => $pr->{'descr_long'}},
3656                                         esc_html($pr->{'descr'})) . "</td>\n" .
3657                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3658                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3659                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3660                       "<td class=\"link\">" .
3661                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3662                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3663                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3664                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3665                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3666                       "</td>\n" .
3667                       "</tr>\n";
3668         }
3669         if (defined $extra) {
3670                 print "<tr>\n";
3671                 if ($check_forks) {
3672                         print "<td></td>\n";
3673                 }
3674                 print "<td colspan=\"5\">$extra</td>\n" .
3675                       "</tr>\n";
3676         }
3677         print "</table>\n";
3678 }
3679
3680 sub git_shortlog_body {
3681         # uses global variable $project
3682         my ($commitlist, $from, $to, $refs, $extra) = @_;
3683
3684         $from = 0 unless defined $from;
3685         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3686
3687         print "<table class=\"shortlog\">\n";
3688         my $alternate = 1;
3689         for (my $i = $from; $i <= $to; $i++) {
3690                 my %co = %{$commitlist->[$i]};
3691                 my $commit = $co{'id'};
3692                 my $ref = format_ref_marker($refs, $commit);
3693                 if ($alternate) {
3694                         print "<tr class=\"dark\">\n";
3695                 } else {
3696                         print "<tr class=\"light\">\n";
3697                 }
3698                 $alternate ^= 1;
3699                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3700                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3701                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3702                       "<td><i>" . $author . "</i></td>\n" .
3703                       "<td>";
3704                 print format_subject_html($co{'title'}, $co{'title_short'},
3705                                           href(action=>"commit", hash=>$commit), $ref);
3706                 print "</td>\n" .
3707                       "<td class=\"link\">" .
3708                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3709                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3710                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3711                 my $snapshot_links = format_snapshot_links($commit);
3712                 if (defined $snapshot_links) {
3713                         print " | " . $snapshot_links;
3714                 }
3715                 print "</td>\n" .
3716                       "</tr>\n";
3717         }
3718         if (defined $extra) {
3719                 print "<tr>\n" .
3720                       "<td colspan=\"4\">$extra</td>\n" .
3721                       "</tr>\n";
3722         }
3723         print "</table>\n";
3724 }
3725
3726 sub git_history_body {
3727         # Warning: assumes constant type (blob or tree) during history
3728         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3729
3730         $from = 0 unless defined $from;
3731         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3732
3733         print "<table class=\"history\">\n";
3734         my $alternate = 1;
3735         for (my $i = $from; $i <= $to; $i++) {
3736                 my %co = %{$commitlist->[$i]};
3737                 if (!%co) {
3738                         next;
3739                 }
3740                 my $commit = $co{'id'};
3741
3742                 my $ref = format_ref_marker($refs, $commit);
3743
3744                 if ($alternate) {
3745                         print "<tr class=\"dark\">\n";
3746                 } else {
3747                         print "<tr class=\"light\">\n";
3748                 }
3749                 $alternate ^= 1;
3750         # shortlog uses      chop_str($co{'author_name'}, 10)
3751                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3752                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3753                       "<td><i>" . $author . "</i></td>\n" .
3754                       "<td>";
3755                 # originally git_history used chop_str($co{'title'}, 50)
3756                 print format_subject_html($co{'title'}, $co{'title_short'},
3757                                           href(action=>"commit", hash=>$commit), $ref);
3758                 print "</td>\n" .
3759                       "<td class=\"link\">" .
3760                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3761                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3762
3763                 if ($ftype eq 'blob') {
3764                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3765                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3766                         if (defined $blob_current && defined $blob_parent &&
3767                                         $blob_current ne $blob_parent) {
3768                                 print " | " .
3769                                         $cgi->a({-href => href(action=>"blobdiff",
3770                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3771                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3772                                                                file_name=>$file_name)},
3773                                                 "diff to current");
3774                         }
3775                 }
3776                 print "</td>\n" .
3777                       "</tr>\n";
3778         }
3779         if (defined $extra) {
3780                 print "<tr>\n" .
3781                       "<td colspan=\"4\">$extra</td>\n" .
3782                       "</tr>\n";
3783         }
3784         print "</table>\n";
3785 }
3786
3787 sub git_tags_body {
3788         # uses global variable $project
3789         my ($taglist, $from, $to, $extra) = @_;
3790         $from = 0 unless defined $from;
3791         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3792
3793         print "<table class=\"tags\">\n";
3794         my $alternate = 1;
3795         for (my $i = $from; $i <= $to; $i++) {
3796                 my $entry = $taglist->[$i];
3797                 my %tag = %$entry;
3798                 my $comment = $tag{'subject'};
3799                 my $comment_short;
3800                 if (defined $comment) {
3801                         $comment_short = chop_str($comment, 30, 5);
3802                 }
3803                 if ($alternate) {
3804                         print "<tr class=\"dark\">\n";
3805                 } else {
3806                         print "<tr class=\"light\">\n";
3807                 }
3808                 $alternate ^= 1;
3809                 if (defined $tag{'age'}) {
3810                         print "<td><i>$tag{'age'}</i></td>\n";
3811                 } else {
3812                         print "<td></td>\n";
3813                 }
3814                 print "<td>" .
3815                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3816                                -class => "list name"}, esc_html($tag{'name'})) .
3817                       "</td>\n" .
3818                       "<td>";
3819                 if (defined $comment) {
3820                         print format_subject_html($comment, $comment_short,
3821                                                   href(action=>"tag", hash=>$tag{'id'}));
3822                 }
3823                 print "</td>\n" .
3824                       "<td class=\"selflink\">";
3825                 if ($tag{'type'} eq "tag") {
3826                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3827                 } else {
3828                         print "&nbsp;";
3829                 }
3830                 print "</td>\n" .
3831                       "<td class=\"link\">" . " | " .
3832                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3833                 if ($tag{'reftype'} eq "commit") {
3834                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3835                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3836                 } elsif ($tag{'reftype'} eq "blob") {
3837                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3838                 }
3839                 print "</td>\n" .
3840                       "</tr>";
3841         }
3842         if (defined $extra) {
3843                 print "<tr>\n" .
3844                       "<td colspan=\"5\">$extra</td>\n" .
3845                       "</tr>\n";
3846         }
3847         print "</table>\n";
3848 }
3849
3850 sub git_heads_body {
3851         # uses global variable $project
3852         my ($headlist, $head, $from, $to, $extra) = @_;
3853         $from = 0 unless defined $from;
3854         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3855
3856         print "<table class=\"heads\">\n";
3857         my $alternate = 1;
3858         for (my $i = $from; $i <= $to; $i++) {
3859                 my $entry = $headlist->[$i];
3860                 my %ref = %$entry;
3861                 my $curr = $ref{'id'} eq $head;
3862                 if ($alternate) {
3863                         print "<tr class=\"dark\">\n";
3864                 } else {
3865                         print "<tr class=\"light\">\n";
3866                 }
3867                 $alternate ^= 1;
3868                 print "<td><i>$ref{'age'}</i></td>\n" .
3869                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3870                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3871                                -class => "list name"},esc_html($ref{'name'})) .
3872                       "</td>\n" .
3873                       "<td class=\"link\">" .
3874                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3875                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3876                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3877                       "</td>\n" .
3878                       "</tr>";
3879         }
3880         if (defined $extra) {
3881                 print "<tr>\n" .
3882                       "<td colspan=\"3\">$extra</td>\n" .
3883                       "</tr>\n";
3884         }
3885         print "</table>\n";
3886 }
3887
3888 sub git_search_grep_body {
3889         my ($commitlist, $from, $to, $extra) = @_;
3890         $from = 0 unless defined $from;
3891         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3892
3893         print "<table class=\"commit_search\">\n";
3894         my $alternate = 1;
3895         for (my $i = $from; $i <= $to; $i++) {
3896                 my %co = %{$commitlist->[$i]};
3897                 if (!%co) {
3898                         next;
3899                 }
3900                 my $commit = $co{'id'};
3901                 if ($alternate) {
3902                         print "<tr class=\"dark\">\n";
3903                 } else {
3904                         print "<tr class=\"light\">\n";
3905                 }
3906                 $alternate ^= 1;
3907                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3908                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3909                       "<td><i>" . $author . "</i></td>\n" .
3910                       "<td>" .
3911                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3912                                -class => "list subject"},
3913                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3914                 my $comment = $co{'comment'};
3915                 foreach my $line (@$comment) {
3916                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3917                                 my ($lead, $match, $trail) = ($1, $2, $3);
3918                                 $match = chop_str($match, 70, 5, 'center');
3919                                 my $contextlen = int((80 - length($match))/2);
3920                                 $contextlen = 30 if ($contextlen > 30);
3921                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3922                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3923
3924                                 $lead  = esc_html($lead);
3925                                 $match = esc_html($match);
3926                                 $trail = esc_html($trail);
3927
3928                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3929                         }
3930                 }
3931                 print "</td>\n" .
3932                       "<td class=\"link\">" .
3933                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3934                       " | " .
3935                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3936                       " | " .
3937                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3938                 print "</td>\n" .
3939                       "</tr>\n";
3940         }
3941         if (defined $extra) {
3942                 print "<tr>\n" .
3943                       "<td colspan=\"3\">$extra</td>\n" .
3944                       "</tr>\n";
3945         }
3946         print "</table>\n";
3947 }
3948
3949 ## ======================================================================
3950 ## ======================================================================
3951 ## actions
3952
3953 sub git_project_list {
3954         my $order = $cgi->param('o');
3955         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3956                 die_error(400, "Unknown order parameter");
3957         }
3958
3959         my @list = git_get_projects_list();
3960         if (!@list) {
3961                 die_error(404, "No projects found");
3962         }
3963
3964         git_header_html();
3965         if (-f $home_text) {
3966                 print "<div class=\"index_include\">\n";
3967                 open (my $fd, $home_text);
3968                 print <$fd>;
3969                 close $fd;
3970                 print "</div>\n";
3971         }
3972         git_project_list_body(\@list, $order);
3973         git_footer_html();
3974 }
3975
3976 sub git_forks {
3977         my $order = $cgi->param('o');
3978         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3979                 die_error(400, "Unknown order parameter");
3980         }
3981
3982         my @list = git_get_projects_list($project);
3983         if (!@list) {
3984                 die_error(404, "No forks found");
3985         }
3986
3987         git_header_html();
3988         git_print_page_nav('','');
3989         git_print_header_div('summary', "$project forks");
3990         git_project_list_body(\@list, $order);
3991         git_footer_html();
3992 }
3993
3994 sub git_project_index {
3995         my @projects = git_get_projects_list($project);
3996
3997         print $cgi->header(
3998                 -type => 'text/plain',
3999                 -charset => 'utf-8',
4000                 -content_disposition => 'inline; filename="index.aux"');
4001
4002         foreach my $pr (@projects) {
4003                 if (!exists $pr->{'owner'}) {
4004                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4005                 }
4006
4007                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4008                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4009                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4010                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4011                 $path  =~ s/ /\+/g;
4012                 $owner =~ s/ /\+/g;
4013
4014                 print "$path $owner\n";
4015         }
4016 }
4017
4018 sub git_summary {
4019         my $descr = git_get_project_description($project) || "none";
4020         my %co = parse_commit("HEAD");
4021         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4022         my $head = $co{'id'};
4023
4024         my $owner = git_get_project_owner($project);
4025
4026         my $refs = git_get_references();
4027         # These get_*_list functions return one more to allow us to see if
4028         # there are more ...
4029         my @taglist  = git_get_tags_list(16);
4030         my @headlist = git_get_heads_list(16);
4031         my @forklist;
4032         my ($check_forks) = gitweb_check_feature('forks');
4033
4034         if ($check_forks) {
4035                 @forklist = git_get_projects_list($project);
4036         }
4037
4038         git_header_html();
4039         git_print_page_nav('summary','', $head);
4040
4041         print "<div class=\"title\">&nbsp;</div>\n";
4042         print "<table class=\"projects_list\">\n" .
4043               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4044               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4045         if (defined $cd{'rfc2822'}) {
4046                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4047         }
4048
4049         # use per project git URL list in $projectroot/$project/cloneurl
4050         # or make project git URL from git base URL and project name
4051         my $url_tag = "URL";
4052         my @url_list = git_get_project_url_list($project);
4053         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4054         foreach my $git_url (@url_list) {
4055                 next unless $git_url;
4056                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4057                 $url_tag = "";
4058         }
4059         print "</table>\n";
4060
4061         if (-s "$projectroot/$project/README.html") {
4062                 if (open my $fd, "$projectroot/$project/README.html") {
4063                         print "<div class=\"title\">readme</div>\n" .
4064                               "<div class=\"readme\">\n";
4065                         print $_ while (<$fd>);
4066                         print "\n</div>\n"; # class="readme"
4067                         close $fd;
4068                 }
4069         }
4070
4071         # we need to request one more than 16 (0..15) to check if
4072         # those 16 are all
4073         my @commitlist = $head ? parse_commits($head, 17) : ();
4074         if (@commitlist) {
4075                 git_print_header_div('shortlog');
4076                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4077                                   $#commitlist <=  15 ? undef :
4078                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4079         }
4080
4081         if (@taglist) {
4082                 git_print_header_div('tags');
4083                 git_tags_body(\@taglist, 0, 15,
4084                               $#taglist <=  15 ? undef :
4085                               $cgi->a({-href => href(action=>"tags")}, "..."));
4086         }
4087
4088         if (@headlist) {
4089                 git_print_header_div('heads');
4090                 git_heads_body(\@headlist, $head, 0, 15,
4091                                $#headlist <= 15 ? undef :
4092                                $cgi->a({-href => href(action=>"heads")}, "..."));
4093         }
4094
4095         if (@forklist) {
4096                 git_print_header_div('forks');
4097                 git_project_list_body(\@forklist, undef, 0, 15,
4098                                       $#forklist <= 15 ? undef :
4099                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4100                                       'noheader');
4101         }
4102
4103         git_footer_html();
4104 }
4105
4106 sub git_tag {
4107         my $head = git_get_head_hash($project);
4108         git_header_html();
4109         git_print_page_nav('','', $head,undef,$head);
4110         my %tag = parse_tag($hash);
4111
4112         if (! %tag) {
4113                 die_error(404, "Unknown tag object");
4114         }
4115
4116         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4117         print "<div class=\"title_text\">\n" .
4118               "<table class=\"object_header\">\n" .
4119               "<tr>\n" .
4120               "<td>object</td>\n" .
4121               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4122                                $tag{'object'}) . "</td>\n" .
4123               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4124                                               $tag{'type'}) . "</td>\n" .
4125               "</tr>\n";
4126         if (defined($tag{'author'})) {
4127                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4128                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4129                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4130                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4131                         "</td></tr>\n";
4132         }
4133         print "</table>\n\n" .
4134               "</div>\n";
4135         print "<div class=\"page_body\">";
4136         my $comment = $tag{'comment'};
4137         foreach my $line (@$comment) {
4138                 chomp $line;
4139                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4140         }
4141         print "</div>\n";
4142         git_footer_html();
4143 }
4144
4145 sub git_blame {
4146         my $fd;
4147         my $ftype;
4148
4149         gitweb_check_feature('blame')
4150             or die_error(403, "Blame view not allowed");
4151
4152         die_error(400, "No file name given") unless $file_name;
4153         $hash_base ||= git_get_head_hash($project);
4154         die_error(404, "Couldn't find base commit") unless ($hash_base);
4155         my %co = parse_commit($hash_base)
4156                 or die_error(404, "Commit not found");
4157         if (!defined $hash) {
4158                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4159                         or die_error(404, "Error looking up file");
4160         }
4161         $ftype = git_get_type($hash);
4162         if ($ftype !~ "blob") {
4163                 die_error(400, "Object is not a blob");
4164         }
4165         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4166               $file_name, $hash_base)
4167                 or die_error(500, "Open git-blame failed");
4168         git_header_html();
4169         my $formats_nav =
4170                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4171                         "blob") .
4172                 " | " .
4173                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4174                         "history") .
4175                 " | " .
4176                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4177                         "HEAD");
4178         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4179         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4180         git_print_page_path($file_name, $ftype, $hash_base);
4181         my @rev_color = (qw(light2 dark2));
4182         my $num_colors = scalar(@rev_color);
4183         my $current_color = 0;
4184         my $last_rev;
4185         print <<HTML;
4186 <div class="page_body">
4187 <table class="blame">
4188 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4189 HTML
4190         my %metainfo = ();
4191         while (1) {
4192                 $_ = <$fd>;
4193                 last unless defined $_;
4194                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4195                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4196                 if (!exists $metainfo{$full_rev}) {
4197                         $metainfo{$full_rev} = {};
4198                 }
4199                 my $meta = $metainfo{$full_rev};
4200                 while (<$fd>) {
4201                         last if (s/^\t//);
4202                         if (/^(\S+) (.*)$/) {
4203                                 $meta->{$1} = $2;
4204                         }
4205                 }
4206                 my $data = $_;
4207                 chomp $data;
4208                 my $rev = substr($full_rev, 0, 8);
4209                 my $author = $meta->{'author'};
4210                 my %date = parse_date($meta->{'author-time'},
4211                                       $meta->{'author-tz'});
4212                 my $date = $date{'iso-tz'};
4213                 if ($group_size) {
4214                         $current_color = ++$current_color % $num_colors;
4215                 }
4216                 print "<tr class=\"$rev_color[$current_color]\">\n";
4217                 if ($group_size) {
4218                         print "<td class=\"sha1\"";
4219                         print " title=\"". esc_html($author) . ", $date\"";
4220                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4221                         print ">";
4222                         print $cgi->a({-href => href(action=>"commit",
4223                                                      hash=>$full_rev,
4224                                                      file_name=>$file_name)},
4225                                       esc_html($rev));
4226                         print "</td>\n";
4227                 }
4228                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4229                         or die_error(500, "Open git-rev-parse failed");
4230                 my $parent_commit = <$dd>;
4231                 close $dd;
4232                 chomp($parent_commit);
4233                 my $blamed = href(action => 'blame',
4234                                   file_name => $meta->{'filename'},
4235                                   hash_base => $parent_commit);
4236                 print "<td class=\"linenr\">";
4237                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4238                                 -id => "l$lineno",
4239                                 -class => "linenr" },
4240                               esc_html($lineno));
4241                 print "</td>";
4242                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4243                 print "</tr>\n";
4244         }
4245         print "</table>\n";
4246         print "</div>";
4247         close $fd
4248                 or print "Reading blob failed\n";
4249         git_footer_html();
4250 }
4251
4252 sub git_tags {
4253         my $head = git_get_head_hash($project);
4254         git_header_html();
4255         git_print_page_nav('','', $head,undef,$head);
4256         git_print_header_div('summary', $project);
4257
4258         my @tagslist = git_get_tags_list();
4259         if (@tagslist) {
4260                 git_tags_body(\@tagslist);
4261         }
4262         git_footer_html();
4263 }
4264
4265 sub git_heads {
4266         my $head = git_get_head_hash($project);
4267         git_header_html();
4268         git_print_page_nav('','', $head,undef,$head);
4269         git_print_header_div('summary', $project);
4270
4271         my @headslist = git_get_heads_list();
4272         if (@headslist) {
4273                 git_heads_body(\@headslist, $head);
4274         }
4275         git_footer_html();
4276 }
4277
4278 sub git_blob_plain {
4279         my $type = shift;
4280         my $expires;
4281
4282         if (!defined $hash) {
4283                 if (defined $file_name) {
4284                         my $base = $hash_base || git_get_head_hash($project);
4285                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4286                                 or die_error(404, "Cannot find file");
4287                 } else {
4288                         die_error(400, "No file name defined");
4289                 }
4290         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4291                 # blobs defined by non-textual hash id's can be cached
4292                 $expires = "+1d";
4293         }
4294
4295         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4296                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4297
4298         # content-type (can include charset)
4299         $type = blob_contenttype($fd, $file_name, $type);
4300
4301         # "save as" filename, even when no $file_name is given
4302         my $save_as = "$hash";
4303         if (defined $file_name) {
4304                 $save_as = $file_name;
4305         } elsif ($type =~ m/^text\//) {
4306                 $save_as .= '.txt';
4307         }
4308
4309         print $cgi->header(
4310                 -type => $type,
4311                 -expires => $expires,
4312                 -content_disposition => 'inline; filename="' . $save_as . '"');
4313         undef $/;
4314         binmode STDOUT, ':raw';
4315         print <$fd>;
4316         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4317         $/ = "\n";
4318         close $fd;
4319 }
4320
4321 sub git_blob {
4322         my $expires;
4323
4324         if (!defined $hash) {
4325                 if (defined $file_name) {
4326                         my $base = $hash_base || git_get_head_hash($project);
4327                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4328                                 or die_error(404, "Cannot find file");
4329                 } else {
4330                         die_error(400, "No file name defined");
4331                 }
4332         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4333                 # blobs defined by non-textual hash id's can be cached
4334                 $expires = "+1d";
4335         }
4336
4337         my ($have_blame) = gitweb_check_feature('blame');
4338         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4339                 or die_error(500, "Couldn't cat $file_name, $hash");
4340         my $mimetype = blob_mimetype($fd, $file_name);
4341         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4342                 close $fd;
4343                 return git_blob_plain($mimetype);
4344         }
4345         # we can have blame only for text/* mimetype
4346         $have_blame &&= ($mimetype =~ m!^text/!);
4347
4348         git_header_html(undef, $expires);
4349         my $formats_nav = '';
4350         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4351                 if (defined $file_name) {
4352                         if ($have_blame) {
4353                                 $formats_nav .=
4354                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4355                                                 "blame") .
4356                                         " | ";
4357                         }
4358                         $formats_nav .=
4359                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4360                                         "history") .
4361                                 " | " .
4362                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4363                                         "raw") .
4364                                 " | " .
4365                                 $cgi->a({-href => href(action=>"blob",
4366                                                        hash_base=>"HEAD", file_name=>$file_name)},
4367                                         "HEAD");
4368                 } else {
4369                         $formats_nav .=
4370                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4371                                         "raw");
4372                 }
4373                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4374                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4375         } else {
4376                 print "<div class=\"page_nav\">\n" .
4377                       "<br/><br/></div>\n" .
4378                       "<div class=\"title\">$hash</div>\n";
4379         }
4380         git_print_page_path($file_name, "blob", $hash_base);
4381         print "<div class=\"page_body\">\n";
4382         if ($mimetype =~ m!^image/!) {
4383                 print qq!<img type="$mimetype"!;
4384                 if ($file_name) {
4385                         print qq! alt="$file_name" title="$file_name"!;
4386                 }
4387                 print qq! src="! .
4388                       href(action=>"blob_plain", hash=>$hash,
4389                            hash_base=>$hash_base, file_name=>$file_name) .
4390                       qq!" />\n!;
4391         } else {
4392                 my $nr;
4393                 while (my $line = <$fd>) {
4394                         chomp $line;
4395                         $nr++;
4396                         $line = untabify($line);
4397                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4398                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4399                 }
4400         }
4401         close $fd
4402                 or print "Reading blob failed.\n";
4403         print "</div>";
4404         git_footer_html();
4405 }
4406
4407 sub git_tree {
4408         if (!defined $hash_base) {
4409                 $hash_base = "HEAD";
4410         }
4411         if (!defined $hash) {
4412                 if (defined $file_name) {
4413                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4414                 } else {
4415                         $hash = $hash_base;
4416                 }
4417         }
4418         $/ = "\0";
4419         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4420                 or die_error(500, "Open git-ls-tree failed");
4421         my @entries = map { chomp; $_ } <$fd>;
4422         close $fd or die_error(404, "Reading tree failed");
4423         $/ = "\n";
4424
4425         my $refs = git_get_references();
4426         my $ref = format_ref_marker($refs, $hash_base);
4427         git_header_html();
4428         my $basedir = '';
4429         my ($have_blame) = gitweb_check_feature('blame');
4430         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4431                 my @views_nav = ();
4432                 if (defined $file_name) {
4433                         push @views_nav,
4434                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4435                                         "history"),
4436                                 $cgi->a({-href => href(action=>"tree",
4437                                                        hash_base=>"HEAD", file_name=>$file_name)},
4438                                         "HEAD"),
4439                 }
4440                 my $snapshot_links = format_snapshot_links($hash);
4441                 if (defined $snapshot_links) {
4442                         # FIXME: Should be available when we have no hash base as well.
4443                         push @views_nav, $snapshot_links;
4444                 }
4445                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4446                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4447         } else {
4448                 undef $hash_base;
4449                 print "<div class=\"page_nav\">\n";
4450                 print "<br/><br/></div>\n";
4451                 print "<div class=\"title\">$hash</div>\n";
4452         }
4453         if (defined $file_name) {
4454                 $basedir = $file_name;
4455                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4456                         $basedir .= '/';
4457                 }
4458         }
4459         git_print_page_path($file_name, 'tree', $hash_base);
4460         print "<div class=\"page_body\">\n";
4461         print "<table class=\"tree\">\n";
4462         my $alternate = 1;
4463         # '..' (top directory) link if possible
4464         if (defined $hash_base &&
4465             defined $file_name && $file_name =~ m![^/]+$!) {
4466                 if ($alternate) {
4467                         print "<tr class=\"dark\">\n";
4468                 } else {
4469                         print "<tr class=\"light\">\n";
4470                 }
4471                 $alternate ^= 1;
4472
4473                 my $up = $file_name;
4474                 $up =~ s!/?[^/]+$!!;
4475                 undef $up unless $up;
4476                 # based on git_print_tree_entry
4477                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4478                 print '<td class="list">';
4479                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4480                                              file_name=>$up)},
4481                               "..");
4482                 print "</td>\n";
4483                 print "<td class=\"link\"></td>\n";
4484
4485                 print "</tr>\n";
4486         }
4487         foreach my $line (@entries) {
4488                 my %t = parse_ls_tree_line($line, -z => 1);
4489
4490                 if ($alternate) {
4491                         print "<tr class=\"dark\">\n";
4492                 } else {
4493                         print "<tr class=\"light\">\n";
4494                 }
4495                 $alternate ^= 1;
4496
4497                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4498
4499                 print "</tr>\n";
4500         }
4501         print "</table>\n" .
4502               "</div>";
4503         git_footer_html();
4504 }
4505
4506 sub git_snapshot {
4507         my @supported_fmts = gitweb_check_feature('snapshot');
4508         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4509
4510         my $format = $cgi->param('sf');
4511         if (!@supported_fmts) {
4512                 die_error(403, "Snapshots not allowed");
4513         }
4514         # default to first supported snapshot format
4515         $format ||= $supported_fmts[0];
4516         if ($format !~ m/^[a-z0-9]+$/) {
4517                 die_error(400, "Invalid snapshot format parameter");
4518         } elsif (!exists($known_snapshot_formats{$format})) {
4519                 die_error(400, "Unknown snapshot format");
4520         } elsif (!grep($_ eq $format, @supported_fmts)) {
4521                 die_error(403, "Unsupported snapshot format");
4522         }
4523
4524         if (!defined $hash) {
4525                 $hash = git_get_head_hash($project);
4526         }
4527
4528         my $name = $project;
4529         $name =~ s,([^/])/*\.git$,$1,;
4530         $name = basename($name);
4531         my $filename = to_utf8($name);
4532         $name =~ s/\047/\047\\\047\047/g;
4533         my $cmd;
4534         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4535         $cmd = quote_command(
4536                 git_cmd(), 'archive',
4537                 "--format=$known_snapshot_formats{$format}{'format'}",
4538                 "--prefix=$name/", $hash);
4539         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4540                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4541         }
4542
4543         print $cgi->header(
4544                 -type => $known_snapshot_formats{$format}{'type'},
4545                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4546                 -status => '200 OK');
4547
4548         open my $fd, "-|", $cmd
4549                 or die_error(500, "Execute git-archive failed");
4550         binmode STDOUT, ':raw';
4551         print <$fd>;
4552         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4553         close $fd;
4554 }
4555
4556 sub git_log {
4557         my $head = git_get_head_hash($project);
4558         if (!defined $hash) {
4559                 $hash = $head;
4560         }
4561         if (!defined $page) {
4562                 $page = 0;
4563         }
4564         my $refs = git_get_references();
4565
4566         my @commitlist = parse_commits($hash, 101, (100 * $page));
4567
4568         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4569
4570         git_header_html();
4571         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4572
4573         if (!@commitlist) {
4574                 my %co = parse_commit($hash);
4575
4576                 git_print_header_div('summary', $project);
4577                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4578         }
4579         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4580         for (my $i = 0; $i <= $to; $i++) {
4581                 my %co = %{$commitlist[$i]};
4582                 next if !%co;
4583                 my $commit = $co{'id'};
4584                 my $ref = format_ref_marker($refs, $commit);
4585                 my %ad = parse_date($co{'author_epoch'});
4586                 git_print_header_div('commit',
4587                                "<span class=\"age\">$co{'age_string'}</span>" .
4588                                esc_html($co{'title'}) . $ref,
4589                                $commit);
4590                 print "<div class=\"title_text\">\n" .
4591                       "<div class=\"log_link\">\n" .
4592                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4593                       " | " .
4594                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4595                       " | " .
4596                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4597                       "<br/>\n" .
4598                       "</div>\n" .
4599                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4600                       "</div>\n";
4601
4602                 print "<div class=\"log_body\">\n";
4603                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4604                 print "</div>\n";
4605         }
4606         if ($#commitlist >= 100) {
4607                 print "<div class=\"page_nav\">\n";
4608                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4609                                -accesskey => "n", -title => "Alt-n"}, "next");
4610                 print "</div>\n";
4611         }
4612         git_footer_html();
4613 }
4614
4615 sub git_commit {
4616         $hash ||= $hash_base || "HEAD";
4617         my %co = parse_commit($hash)
4618             or die_error(404, "Unknown commit object");
4619         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4620         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4621
4622         my $parent  = $co{'parent'};
4623         my $parents = $co{'parents'}; # listref
4624
4625         # we need to prepare $formats_nav before any parameter munging
4626         my $formats_nav;
4627         if (!defined $parent) {
4628                 # --root commitdiff
4629                 $formats_nav .= '(initial)';
4630         } elsif (@$parents == 1) {
4631                 # single parent commit
4632                 $formats_nav .=
4633                         '(parent: ' .
4634                         $cgi->a({-href => href(action=>"commit",
4635                                                hash=>$parent)},
4636                                 esc_html(substr($parent, 0, 7))) .
4637                         ')';
4638         } else {
4639                 # merge commit
4640                 $formats_nav .=
4641                         '(merge: ' .
4642                         join(' ', map {
4643                                 $cgi->a({-href => href(action=>"commit",
4644                                                        hash=>$_)},
4645                                         esc_html(substr($_, 0, 7)));
4646                         } @$parents ) .
4647                         ')';
4648         }
4649
4650         if (!defined $parent) {
4651                 $parent = "--root";
4652         }
4653         my @difftree;
4654         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4655                 @diff_opts,
4656                 (@$parents <= 1 ? $parent : '-c'),
4657                 $hash, "--"
4658                 or die_error(500, "Open git-diff-tree failed");
4659         @difftree = map { chomp; $_ } <$fd>;
4660         close $fd or die_error(404, "Reading git-diff-tree failed");
4661
4662         # non-textual hash id's can be cached
4663         my $expires;
4664         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4665                 $expires = "+1d";
4666         }
4667         my $refs = git_get_references();
4668         my $ref = format_ref_marker($refs, $co{'id'});
4669
4670         git_header_html(undef, $expires);
4671         git_print_page_nav('commit', '',
4672                            $hash, $co{'tree'}, $hash,
4673                            $formats_nav);
4674
4675         if (defined $co{'parent'}) {
4676                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4677         } else {
4678                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4679         }
4680         print "<div class=\"title_text\">\n" .
4681               "<table class=\"object_header\">\n";
4682         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4683               "<tr>" .
4684               "<td></td><td> $ad{'rfc2822'}";
4685         if ($ad{'hour_local'} < 6) {
4686                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4687                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4688         } else {
4689                 printf(" (%02d:%02d %s)",
4690                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4691         }
4692         print "</td>" .
4693               "</tr>\n";
4694         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4695         print "<tr><td></td><td> $cd{'rfc2822'}" .
4696               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4697               "</td></tr>\n";
4698         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4699         print "<tr>" .
4700               "<td>tree</td>" .
4701               "<td class=\"sha1\">" .
4702               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4703                        class => "list"}, $co{'tree'}) .
4704               "</td>" .
4705               "<td class=\"link\">" .
4706               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4707                       "tree");
4708         my $snapshot_links = format_snapshot_links($hash);
4709         if (defined $snapshot_links) {
4710                 print " | " . $snapshot_links;
4711         }
4712         print "</td>" .
4713               "</tr>\n";
4714
4715         foreach my $par (@$parents) {
4716                 print "<tr>" .
4717                       "<td>parent</td>" .
4718                       "<td class=\"sha1\">" .
4719                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4720                                class => "list"}, $par) .
4721                       "</td>" .
4722                       "<td class=\"link\">" .
4723                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4724                       " | " .
4725                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4726                       "</td>" .
4727                       "</tr>\n";
4728         }
4729         print "</table>".
4730               "</div>\n";
4731
4732         print "<div class=\"page_body\">\n";
4733         git_print_log($co{'comment'});
4734         print "</div>\n";
4735
4736         git_difftree_body(\@difftree, $hash, @$parents);
4737
4738         git_footer_html();
4739 }
4740
4741 sub git_object {
4742         # object is defined by:
4743         # - hash or hash_base alone
4744         # - hash_base and file_name
4745         my $type;
4746
4747         # - hash or hash_base alone
4748         if ($hash || ($hash_base && !defined $file_name)) {
4749                 my $object_id = $hash || $hash_base;
4750
4751                 open my $fd, "-|", quote_command(
4752                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4753                         or die_error(404, "Object does not exist");
4754                 $type = <$fd>;
4755                 chomp $type;
4756                 close $fd
4757                         or die_error(404, "Object does not exist");
4758
4759         # - hash_base and file_name
4760         } elsif ($hash_base && defined $file_name) {
4761                 $file_name =~ s,/+$,,;
4762
4763                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4764                         or die_error(404, "Base object does not exist");
4765
4766                 # here errors should not hapen
4767                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4768                         or die_error(500, "Open git-ls-tree failed");
4769                 my $line = <$fd>;
4770                 close $fd;
4771
4772                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4773                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4774                         die_error(404, "File or directory for given base does not exist");
4775                 }
4776                 $type = $2;
4777                 $hash = $3;
4778         } else {
4779                 die_error(400, "Not enough information to find object");
4780         }
4781
4782         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4783                                           hash=>$hash, hash_base=>$hash_base,
4784                                           file_name=>$file_name),
4785                              -status => '302 Found');
4786 }
4787
4788 sub git_blobdiff {
4789         my $format = shift || 'html';
4790
4791         my $fd;
4792         my @difftree;
4793         my %diffinfo;
4794         my $expires;
4795
4796         # preparing $fd and %diffinfo for git_patchset_body
4797         # new style URI
4798         if (defined $hash_base && defined $hash_parent_base) {
4799                 if (defined $file_name) {
4800                         # read raw output
4801                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4802                                 $hash_parent_base, $hash_base,
4803                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4804                                 or die_error(500, "Open git-diff-tree failed");
4805                         @difftree = map { chomp; $_ } <$fd>;
4806                         close $fd
4807                                 or die_error(404, "Reading git-diff-tree failed");
4808                         @difftree
4809                                 or die_error(404, "Blob diff not found");
4810
4811                 } elsif (defined $hash &&
4812                          $hash =~ /[0-9a-fA-F]{40}/) {
4813                         # try to find filename from $hash
4814
4815                         # read filtered raw output
4816                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4817                                 $hash_parent_base, $hash_base, "--"
4818                                 or die_error(500, "Open git-diff-tree failed");
4819                         @difftree =
4820                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4821                                 # $hash == to_id
4822                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4823                                 map { chomp; $_ } <$fd>;
4824                         close $fd
4825                                 or die_error(404, "Reading git-diff-tree failed");
4826                         @difftree
4827                                 or die_error(404, "Blob diff not found");
4828
4829                 } else {
4830                         die_error(400, "Missing one of the blob diff parameters");
4831                 }
4832
4833                 if (@difftree > 1) {
4834                         die_error(400, "Ambiguous blob diff specification");
4835                 }
4836
4837                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4838                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4839                 $file_name   ||= $diffinfo{'to_file'};
4840
4841                 $hash_parent ||= $diffinfo{'from_id'};
4842                 $hash        ||= $diffinfo{'to_id'};
4843
4844                 # non-textual hash id's can be cached
4845                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4846                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4847                         $expires = '+1d';
4848                 }
4849
4850                 # open patch output
4851                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4852                         '-p', ($format eq 'html' ? "--full-index" : ()),
4853                         $hash_parent_base, $hash_base,
4854                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4855                         or die_error(500, "Open git-diff-tree failed");
4856         }
4857
4858         # old/legacy style URI
4859         if (!%diffinfo && # if new style URI failed
4860             defined $hash && defined $hash_parent) {
4861                 # fake git-diff-tree raw output
4862                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4863                 $diffinfo{'from_id'} = $hash_parent;
4864                 $diffinfo{'to_id'}   = $hash;
4865                 if (defined $file_name) {
4866                         if (defined $file_parent) {
4867                                 $diffinfo{'status'} = '2';
4868                                 $diffinfo{'from_file'} = $file_parent;
4869                                 $diffinfo{'to_file'}   = $file_name;
4870                         } else { # assume not renamed
4871                                 $diffinfo{'status'} = '1';
4872                                 $diffinfo{'from_file'} = $file_name;
4873                                 $diffinfo{'to_file'}   = $file_name;
4874                         }
4875                 } else { # no filename given
4876                         $diffinfo{'status'} = '2';
4877                         $diffinfo{'from_file'} = $hash_parent;
4878                         $diffinfo{'to_file'}   = $hash;
4879                 }
4880
4881                 # non-textual hash id's can be cached
4882                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4883                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4884                         $expires = '+1d';
4885                 }
4886
4887                 # open patch output
4888                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4889                         '-p', ($format eq 'html' ? "--full-index" : ()),
4890                         $hash_parent, $hash, "--"
4891                         or die_error(500, "Open git-diff failed");
4892         } else  {
4893                 die_error(400, "Missing one of the blob diff parameters")
4894                         unless %diffinfo;
4895         }
4896
4897         # header
4898         if ($format eq 'html') {
4899                 my $formats_nav =
4900                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4901                                 "raw");
4902                 git_header_html(undef, $expires);
4903                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4904                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4905                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4906                 } else {
4907                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4908                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4909                 }
4910                 if (defined $file_name) {
4911                         git_print_page_path($file_name, "blob", $hash_base);
4912                 } else {
4913                         print "<div class=\"page_path\"></div>\n";
4914                 }
4915
4916         } elsif ($format eq 'plain') {
4917                 print $cgi->header(
4918                         -type => 'text/plain',
4919                         -charset => 'utf-8',
4920                         -expires => $expires,
4921                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4922
4923                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4924
4925         } else {
4926                 die_error(400, "Unknown blobdiff format");
4927         }
4928
4929         # patch
4930         if ($format eq 'html') {
4931                 print "<div class=\"page_body\">\n";
4932
4933                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4934                 close $fd;
4935
4936                 print "</div>\n"; # class="page_body"
4937                 git_footer_html();
4938
4939         } else {
4940                 while (my $line = <$fd>) {
4941                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4942                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4943
4944                         print $line;
4945
4946                         last if $line =~ m!^\+\+\+!;
4947                 }
4948                 local $/ = undef;
4949                 print <$fd>;
4950                 close $fd;
4951         }
4952 }
4953
4954 sub git_blobdiff_plain {
4955         git_blobdiff('plain');
4956 }
4957
4958 sub git_commitdiff {
4959         my $format = shift || 'html';
4960         $hash ||= $hash_base || "HEAD";
4961         my %co = parse_commit($hash)
4962             or die_error(404, "Unknown commit object");
4963
4964         # choose format for commitdiff for merge
4965         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4966                 $hash_parent = '--cc';
4967         }
4968         # we need to prepare $formats_nav before almost any parameter munging
4969         my $formats_nav;
4970         if ($format eq 'html') {
4971                 $formats_nav =
4972                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4973                                 "raw");
4974
4975                 if (defined $hash_parent &&
4976                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4977                         # commitdiff with two commits given
4978                         my $hash_parent_short = $hash_parent;
4979                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4980                                 $hash_parent_short = substr($hash_parent, 0, 7);
4981                         }
4982                         $formats_nav .=
4983                                 ' (from';
4984                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4985                                 if ($co{'parents'}[$i] eq $hash_parent) {
4986                                         $formats_nav .= ' parent ' . ($i+1);
4987                                         last;
4988                                 }
4989                         }
4990                         $formats_nav .= ': ' .
4991                                 $cgi->a({-href => href(action=>"commitdiff",
4992                                                        hash=>$hash_parent)},
4993                                         esc_html($hash_parent_short)) .
4994                                 ')';
4995                 } elsif (!$co{'parent'}) {
4996                         # --root commitdiff
4997                         $formats_nav .= ' (initial)';
4998                 } elsif (scalar @{$co{'parents'}} == 1) {
4999                         # single parent commit
5000                         $formats_nav .=
5001                                 ' (parent: ' .
5002                                 $cgi->a({-href => href(action=>"commitdiff",
5003                                                        hash=>$co{'parent'})},
5004                                         esc_html(substr($co{'parent'}, 0, 7))) .
5005                                 ')';
5006                 } else {
5007                         # merge commit
5008                         if ($hash_parent eq '--cc') {
5009                                 $formats_nav .= ' | ' .
5010                                         $cgi->a({-href => href(action=>"commitdiff",
5011                                                                hash=>$hash, hash_parent=>'-c')},
5012                                                 'combined');
5013                         } else { # $hash_parent eq '-c'
5014                                 $formats_nav .= ' | ' .
5015                                         $cgi->a({-href => href(action=>"commitdiff",
5016                                                                hash=>$hash, hash_parent=>'--cc')},
5017                                                 'compact');
5018                         }
5019                         $formats_nav .=
5020                                 ' (merge: ' .
5021                                 join(' ', map {
5022                                         $cgi->a({-href => href(action=>"commitdiff",
5023                                                                hash=>$_)},
5024                                                 esc_html(substr($_, 0, 7)));
5025                                 } @{$co{'parents'}} ) .
5026                                 ')';
5027                 }
5028         }
5029
5030         my $hash_parent_param = $hash_parent;
5031         if (!defined $hash_parent_param) {
5032                 # --cc for multiple parents, --root for parentless
5033                 $hash_parent_param =
5034                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5035         }
5036
5037         # read commitdiff
5038         my $fd;
5039         my @difftree;
5040         if ($format eq 'html') {
5041                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5042                         "--no-commit-id", "--patch-with-raw", "--full-index",
5043                         $hash_parent_param, $hash, "--"
5044                         or die_error(500, "Open git-diff-tree failed");
5045
5046                 while (my $line = <$fd>) {
5047                         chomp $line;
5048                         # empty line ends raw part of diff-tree output
5049                         last unless $line;
5050                         push @difftree, scalar parse_difftree_raw_line($line);
5051                 }
5052
5053         } elsif ($format eq 'plain') {
5054                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5055                         '-p', $hash_parent_param, $hash, "--"
5056                         or die_error(500, "Open git-diff-tree failed");
5057
5058         } else {
5059                 die_error(400, "Unknown commitdiff format");
5060         }
5061
5062         # non-textual hash id's can be cached
5063         my $expires;
5064         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5065                 $expires = "+1d";
5066         }
5067
5068         # write commit message
5069         if ($format eq 'html') {
5070                 my $refs = git_get_references();
5071                 my $ref = format_ref_marker($refs, $co{'id'});
5072
5073                 git_header_html(undef, $expires);
5074                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5075                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5076                 git_print_authorship(\%co);
5077                 print "<div class=\"page_body\">\n";
5078                 if (@{$co{'comment'}} > 1) {
5079                         print "<div class=\"log\">\n";
5080                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5081                         print "</div>\n"; # class="log"
5082                 }
5083
5084         } elsif ($format eq 'plain') {
5085                 my $refs = git_get_references("tags");
5086                 my $tagname = git_get_rev_name_tags($hash);
5087                 my $filename = basename($project) . "-$hash.patch";
5088
5089                 print $cgi->header(
5090                         -type => 'text/plain',
5091                         -charset => 'utf-8',
5092                         -expires => $expires,
5093                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5094                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5095                 print "From: " . to_utf8($co{'author'}) . "\n";
5096                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5097                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5098
5099                 print "X-Git-Tag: $tagname\n" if $tagname;
5100                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5101
5102                 foreach my $line (@{$co{'comment'}}) {
5103                         print to_utf8($line) . "\n";
5104                 }
5105                 print "---\n\n";
5106         }
5107
5108         # write patch
5109         if ($format eq 'html') {
5110                 my $use_parents = !defined $hash_parent ||
5111                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5112                 git_difftree_body(\@difftree, $hash,
5113                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5114                 print "<br/>\n";
5115
5116                 git_patchset_body($fd, \@difftree, $hash,
5117                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5118                 close $fd;
5119                 print "</div>\n"; # class="page_body"
5120                 git_footer_html();
5121
5122         } elsif ($format eq 'plain') {
5123                 local $/ = undef;
5124                 print <$fd>;
5125                 close $fd
5126                         or print "Reading git-diff-tree failed\n";
5127         }
5128 }
5129
5130 sub git_commitdiff_plain {
5131         git_commitdiff('plain');
5132 }
5133
5134 sub git_history {
5135         if (!defined $hash_base) {
5136                 $hash_base = git_get_head_hash($project);
5137         }
5138         if (!defined $page) {
5139                 $page = 0;
5140         }
5141         my $ftype;
5142         my %co = parse_commit($hash_base)
5143             or die_error(404, "Unknown commit object");
5144
5145         my $refs = git_get_references();
5146         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5147
5148         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5149                                        $file_name, "--full-history")
5150             or die_error(404, "No such file or directory on given branch");
5151
5152         if (!defined $hash && defined $file_name) {
5153                 # some commits could have deleted file in question,
5154                 # and not have it in tree, but one of them has to have it
5155                 for (my $i = 0; $i <= @commitlist; $i++) {
5156                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5157                         last if defined $hash;
5158                 }
5159         }
5160         if (defined $hash) {
5161                 $ftype = git_get_type($hash);
5162         }
5163         if (!defined $ftype) {
5164                 die_error(500, "Unknown type of object");
5165         }
5166
5167         my $paging_nav = '';
5168         if ($page > 0) {
5169                 $paging_nav .=
5170                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5171                                                file_name=>$file_name)},
5172                                 "first");
5173                 $paging_nav .= " &sdot; " .
5174                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5175                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5176         } else {
5177                 $paging_nav .= "first";
5178                 $paging_nav .= " &sdot; prev";
5179         }
5180         my $next_link = '';
5181         if ($#commitlist >= 100) {
5182                 $next_link =
5183                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5184                                  -accesskey => "n", -title => "Alt-n"}, "next");
5185                 $paging_nav .= " &sdot; $next_link";
5186         } else {
5187                 $paging_nav .= " &sdot; next";
5188         }
5189
5190         git_header_html();
5191         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5192         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5193         git_print_page_path($file_name, $ftype, $hash_base);
5194
5195         git_history_body(\@commitlist, 0, 99,
5196                          $refs, $hash_base, $ftype, $next_link);
5197
5198         git_footer_html();
5199 }
5200
5201 sub git_search {
5202         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5203         if (!defined $searchtext) {
5204                 die_error(400, "Text field is empty");
5205         }
5206         if (!defined $hash) {
5207                 $hash = git_get_head_hash($project);
5208         }
5209         my %co = parse_commit($hash);
5210         if (!%co) {
5211                 die_error(404, "Unknown commit object");
5212         }
5213         if (!defined $page) {
5214                 $page = 0;
5215         }
5216
5217         $searchtype ||= 'commit';
5218         if ($searchtype eq 'pickaxe') {
5219                 # pickaxe may take all resources of your box and run for several minutes
5220                 # with every query - so decide by yourself how public you make this feature
5221                 gitweb_check_feature('pickaxe')
5222                     or die_error(403, "Pickaxe is disabled");
5223         }
5224         if ($searchtype eq 'grep') {
5225                 gitweb_check_feature('grep')
5226                     or die_error(403, "Grep is disabled");
5227         }
5228
5229         git_header_html();
5230
5231         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5232                 my $greptype;
5233                 if ($searchtype eq 'commit') {
5234                         $greptype = "--grep=";
5235                 } elsif ($searchtype eq 'author') {
5236                         $greptype = "--author=";
5237                 } elsif ($searchtype eq 'committer') {
5238                         $greptype = "--committer=";
5239                 }
5240                 $greptype .= $searchtext;
5241                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5242                                                $greptype, '--regexp-ignore-case',
5243                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5244
5245                 my $paging_nav = '';
5246                 if ($page > 0) {
5247                         $paging_nav .=
5248                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5249                                                        searchtext=>$searchtext,
5250                                                        searchtype=>$searchtype)},
5251                                         "first");
5252                         $paging_nav .= " &sdot; " .
5253                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5254                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5255                 } else {
5256                         $paging_nav .= "first";
5257                         $paging_nav .= " &sdot; prev";
5258                 }
5259                 my $next_link = '';
5260                 if ($#commitlist >= 100) {
5261                         $next_link =
5262                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5263                                          -accesskey => "n", -title => "Alt-n"}, "next");
5264                         $paging_nav .= " &sdot; $next_link";
5265                 } else {
5266                         $paging_nav .= " &sdot; next";
5267                 }
5268
5269                 if ($#commitlist >= 100) {
5270                 }
5271
5272                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5273                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5274                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5275         }
5276
5277         if ($searchtype eq 'pickaxe') {
5278                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5279                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5280
5281                 print "<table class=\"pickaxe search\">\n";
5282                 my $alternate = 1;
5283                 $/ = "\n";
5284                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5285                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5286                         ($search_use_regexp ? '--pickaxe-regex' : ());
5287                 undef %co;
5288                 my @files;
5289                 while (my $line = <$fd>) {
5290                         chomp $line;
5291                         next unless $line;
5292
5293                         my %set = parse_difftree_raw_line($line);
5294                         if (defined $set{'commit'}) {
5295                                 # finish previous commit
5296                                 if (%co) {
5297                                         print "</td>\n" .
5298                                               "<td class=\"link\">" .
5299                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5300                                               " | " .
5301                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5302                                         print "</td>\n" .
5303                                               "</tr>\n";
5304                                 }
5305
5306                                 if ($alternate) {
5307                                         print "<tr class=\"dark\">\n";
5308                                 } else {
5309                                         print "<tr class=\"light\">\n";
5310                                 }
5311                                 $alternate ^= 1;
5312                                 %co = parse_commit($set{'commit'});
5313                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5314                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5315                                       "<td><i>$author</i></td>\n" .
5316                                       "<td>" .
5317                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5318                                               -class => "list subject"},
5319                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5320                         } elsif (defined $set{'to_id'}) {
5321                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5322
5323                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5324                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5325                                               -class => "list"},
5326                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5327                                       "<br/>\n";
5328                         }
5329                 }
5330                 close $fd;
5331
5332                 # finish last commit (warning: repetition!)
5333                 if (%co) {
5334                         print "</td>\n" .
5335                               "<td class=\"link\">" .
5336                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5337                               " | " .
5338                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5339                         print "</td>\n" .
5340                               "</tr>\n";
5341                 }
5342
5343                 print "</table>\n";
5344         }
5345
5346         if ($searchtype eq 'grep') {
5347                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5348                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5349
5350                 print "<table class=\"grep_search\">\n";
5351                 my $alternate = 1;
5352                 my $matches = 0;
5353                 $/ = "\n";
5354                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5355                         $search_use_regexp ? ('-E', '-i') : '-F',
5356                         $searchtext, $co{'tree'};
5357                 my $lastfile = '';
5358                 while (my $line = <$fd>) {
5359                         chomp $line;
5360                         my ($file, $lno, $ltext, $binary);
5361                         last if ($matches++ > 1000);
5362                         if ($line =~ /^Binary file (.+) matches$/) {
5363                                 $file = $1;
5364                                 $binary = 1;
5365                         } else {
5366                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5367                         }
5368                         if ($file ne $lastfile) {
5369                                 $lastfile and print "</td></tr>\n";
5370                                 if ($alternate++) {
5371                                         print "<tr class=\"dark\">\n";
5372                                 } else {
5373                                         print "<tr class=\"light\">\n";
5374                                 }
5375                                 print "<td class=\"list\">".
5376                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5377                                                                file_name=>"$file"),
5378                                                 -class => "list"}, esc_path($file));
5379                                 print "</td><td>\n";
5380                                 $lastfile = $file;
5381                         }
5382                         if ($binary) {
5383                                 print "<div class=\"binary\">Binary file</div>\n";
5384                         } else {
5385                                 $ltext = untabify($ltext);
5386                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5387                                         $ltext = esc_html($1, -nbsp=>1);
5388                                         $ltext .= '<span class="match">';
5389                                         $ltext .= esc_html($2, -nbsp=>1);
5390                                         $ltext .= '</span>';
5391                                         $ltext .= esc_html($3, -nbsp=>1);
5392                                 } else {
5393                                         $ltext = esc_html($ltext, -nbsp=>1);
5394                                 }
5395                                 print "<div class=\"pre\">" .
5396                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5397                                                                file_name=>"$file").'#l'.$lno,
5398                                                 -class => "linenr"}, sprintf('%4i', $lno))
5399                                         . ' ' .  $ltext . "</div>\n";
5400                         }
5401                 }
5402                 if ($lastfile) {
5403                         print "</td></tr>\n";
5404                         if ($matches > 1000) {
5405                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5406                         }
5407                 } else {
5408                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5409                 }
5410                 close $fd;
5411
5412                 print "</table>\n";
5413         }
5414         git_footer_html();
5415 }
5416
5417 sub git_search_help {
5418         git_header_html();
5419         git_print_page_nav('','', $hash,$hash,$hash);
5420         print <<EOT;
5421 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5422 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5423 the pattern entered is recognized as the POSIX extended
5424 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5425 insensitive).</p>
5426 <dl>
5427 <dt><b>commit</b></dt>
5428 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5429 EOT
5430         my ($have_grep) = gitweb_check_feature('grep');
5431         if ($have_grep) {
5432                 print <<EOT;
5433 <dt><b>grep</b></dt>
5434 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5435     a different one) are searched for the given pattern. On large trees, this search can take
5436 a while and put some strain on the server, so please use it with some consideration. Note that
5437 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5438 case-sensitive.</dd>
5439 EOT
5440         }
5441         print <<EOT;
5442 <dt><b>author</b></dt>
5443 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5444 <dt><b>committer</b></dt>
5445 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5446 EOT
5447         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5448         if ($have_pickaxe) {
5449                 print <<EOT;
5450 <dt><b>pickaxe</b></dt>
5451 <dd>All commits that caused the string to appear or disappear from any file (changes that
5452 added, removed or "modified" the string) will be listed. This search can take a while and
5453 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5454 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5455 EOT
5456         }
5457         print "</dl>\n";
5458         git_footer_html();
5459 }
5460
5461 sub git_shortlog {
5462         my $head = git_get_head_hash($project);
5463         if (!defined $hash) {
5464                 $hash = $head;
5465         }
5466         if (!defined $page) {
5467                 $page = 0;
5468         }
5469         my $refs = git_get_references();
5470
5471         my @commitlist = parse_commits($hash, 101, (100 * $page));
5472
5473         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5474         my $next_link = '';
5475         if ($#commitlist >= 100) {
5476                 $next_link =
5477                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5478                                  -accesskey => "n", -title => "Alt-n"}, "next");
5479         }
5480
5481         git_header_html();
5482         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5483         git_print_header_div('summary', $project);
5484
5485         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5486
5487         git_footer_html();
5488 }
5489
5490 ## ......................................................................
5491 ## feeds (RSS, Atom; OPML)
5492
5493 sub git_feed {
5494         my $format = shift || 'atom';
5495         my ($have_blame) = gitweb_check_feature('blame');
5496
5497         # Atom: http://www.atomenabled.org/developers/syndication/
5498         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5499         if ($format ne 'rss' && $format ne 'atom') {
5500                 die_error(400, "Unknown web feed format");
5501         }
5502
5503         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5504         my $head = $hash || 'HEAD';
5505         my @commitlist = parse_commits($head, 150, 0, $file_name);
5506
5507         my %latest_commit;
5508         my %latest_date;
5509         my $content_type = "application/$format+xml";
5510         if (defined $cgi->http('HTTP_ACCEPT') &&
5511                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5512                 # browser (feed reader) prefers text/xml
5513                 $content_type = 'text/xml';
5514         }
5515         if (defined($commitlist[0])) {
5516                 %latest_commit = %{$commitlist[0]};
5517                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5518                 print $cgi->header(
5519                         -type => $content_type,
5520                         -charset => 'utf-8',
5521                         -last_modified => $latest_date{'rfc2822'});
5522         } else {
5523                 print $cgi->header(
5524                         -type => $content_type,
5525                         -charset => 'utf-8');
5526         }
5527
5528         # Optimization: skip generating the body if client asks only
5529         # for Last-Modified date.
5530         return if ($cgi->request_method() eq 'HEAD');
5531
5532         # header variables
5533         my $title = "$site_name - $project/$action";
5534         my $feed_type = 'log';
5535         if (defined $hash) {
5536                 $title .= " - '$hash'";
5537                 $feed_type = 'branch log';
5538                 if (defined $file_name) {
5539                         $title .= " :: $file_name";
5540                         $feed_type = 'history';
5541                 }
5542         } elsif (defined $file_name) {
5543                 $title .= " - $file_name";
5544                 $feed_type = 'history';
5545         }
5546         $title .= " $feed_type";
5547         my $descr = git_get_project_description($project);
5548         if (defined $descr) {
5549                 $descr = esc_html($descr);
5550         } else {
5551                 $descr = "$project " .
5552                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5553                          " feed";
5554         }
5555         my $owner = git_get_project_owner($project);
5556         $owner = esc_html($owner);
5557
5558         #header
5559         my $alt_url;
5560         if (defined $file_name) {
5561                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5562         } elsif (defined $hash) {
5563                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5564         } else {
5565                 $alt_url = href(-full=>1, action=>"summary");
5566         }
5567         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5568         if ($format eq 'rss') {
5569                 print <<XML;
5570 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5571 <channel>
5572 XML
5573                 print "<title>$title</title>\n" .
5574                       "<link>$alt_url</link>\n" .
5575                       "<description>$descr</description>\n" .
5576                       "<language>en</language>\n";
5577         } elsif ($format eq 'atom') {
5578                 print <<XML;
5579 <feed xmlns="http://www.w3.org/2005/Atom">
5580 XML
5581                 print "<title>$title</title>\n" .
5582                       "<subtitle>$descr</subtitle>\n" .
5583                       '<link rel="alternate" type="text/html" href="' .
5584                       $alt_url . '" />' . "\n" .
5585                       '<link rel="self" type="' . $content_type . '" href="' .
5586                       $cgi->self_url() . '" />' . "\n" .
5587                       "<id>" . href(-full=>1) . "</id>\n" .
5588                       # use project owner for feed author
5589                       "<author><name>$owner</name></author>\n";
5590                 if (defined $favicon) {
5591                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5592                 }
5593                 if (defined $logo_url) {
5594                         # not twice as wide as tall: 72 x 27 pixels
5595                         print "<logo>" . esc_url($logo) . "</logo>\n";
5596                 }
5597                 if (! %latest_date) {
5598                         # dummy date to keep the feed valid until commits trickle in:
5599                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5600                 } else {
5601                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5602                 }
5603         }
5604
5605         # contents
5606         for (my $i = 0; $i <= $#commitlist; $i++) {
5607                 my %co = %{$commitlist[$i]};
5608                 my $commit = $co{'id'};
5609                 # we read 150, we always show 30 and the ones more recent than 48 hours
5610                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5611                         last;
5612                 }
5613                 my %cd = parse_date($co{'author_epoch'});
5614
5615                 # get list of changed files
5616                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5617                         $co{'parent'} || "--root",
5618                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5619                         or next;
5620                 my @difftree = map { chomp; $_ } <$fd>;
5621                 close $fd
5622                         or next;
5623
5624                 # print element (entry, item)
5625                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5626                 if ($format eq 'rss') {
5627                         print "<item>\n" .
5628                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5629                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5630                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5631                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5632                               "<link>$co_url</link>\n" .
5633                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5634                               "<content:encoded>" .
5635                               "<![CDATA[\n";
5636                 } elsif ($format eq 'atom') {
5637                         print "<entry>\n" .
5638                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5639                               "<updated>$cd{'iso-8601'}</updated>\n" .
5640                               "<author>\n" .
5641                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5642                         if ($co{'author_email'}) {
5643                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5644                         }
5645                         print "</author>\n" .
5646                               # use committer for contributor
5647                               "<contributor>\n" .
5648                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5649                         if ($co{'committer_email'}) {
5650                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5651                         }
5652                         print "</contributor>\n" .
5653                               "<published>$cd{'iso-8601'}</published>\n" .
5654                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5655                               "<id>$co_url</id>\n" .
5656                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5657                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5658                 }
5659                 my $comment = $co{'comment'};
5660                 print "<pre>\n";
5661                 foreach my $line (@$comment) {
5662                         $line = esc_html($line);
5663                         print "$line\n";
5664                 }
5665                 print "</pre><ul>\n";
5666                 foreach my $difftree_line (@difftree) {
5667                         my %difftree = parse_difftree_raw_line($difftree_line);
5668                         next if !$difftree{'from_id'};
5669
5670                         my $file = $difftree{'file'} || $difftree{'to_file'};
5671
5672                         print "<li>" .
5673                               "[" .
5674                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5675                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5676                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5677                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5678                                       -title => "diff"}, 'D');
5679                         if ($have_blame) {
5680                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5681                                                              file_name=>$file, hash_base=>$commit),
5682                                               -title => "blame"}, 'B');
5683                         }
5684                         # if this is not a feed of a file history
5685                         if (!defined $file_name || $file_name ne $file) {
5686                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5687                                                              file_name=>$file, hash=>$commit),
5688                                               -title => "history"}, 'H');
5689                         }
5690                         $file = esc_path($file);
5691                         print "] ".
5692                               "$file</li>\n";
5693                 }
5694                 if ($format eq 'rss') {
5695                         print "</ul>]]>\n" .
5696                               "</content:encoded>\n" .
5697                               "</item>\n";
5698                 } elsif ($format eq 'atom') {
5699                         print "</ul>\n</div>\n" .
5700                               "</content>\n" .
5701                               "</entry>\n";
5702                 }
5703         }
5704
5705         # end of feed
5706         if ($format eq 'rss') {
5707                 print "</channel>\n</rss>\n";
5708         }       elsif ($format eq 'atom') {
5709                 print "</feed>\n";
5710         }
5711 }
5712
5713 sub git_rss {
5714         git_feed('rss');
5715 }
5716
5717 sub git_atom {
5718         git_feed('atom');
5719 }
5720
5721 sub git_opml {
5722         my @list = git_get_projects_list();
5723
5724         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5725         print <<XML;
5726 <?xml version="1.0" encoding="utf-8"?>
5727 <opml version="1.0">
5728 <head>
5729   <title>$site_name OPML Export</title>
5730 </head>
5731 <body>
5732 <outline text="git RSS feeds">
5733 XML
5734
5735         foreach my $pr (@list) {
5736                 my %proj = %$pr;
5737                 my $head = git_get_head_hash($proj{'path'});
5738                 if (!defined $head) {
5739                         next;
5740                 }
5741                 $git_dir = "$projectroot/$proj{'path'}";
5742                 my %co = parse_commit($head);
5743                 if (!%co) {
5744                         next;
5745                 }
5746
5747                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5748                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5749                 my $html = "$my_url?p=$proj{'path'};a=summary";
5750                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5751         }
5752         print <<XML;
5753 </outline>
5754 </body>
5755 </opml>
5756 XML
5757 }