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(undef, "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(undef, "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(undef, "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(undef, "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(undef, "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(undef, "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(undef, "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(undef, "Invalid option parameter");
 452                 }
 453                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 454                         die_error(undef, "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(undef, "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(undef, "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(undef, "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(undef, "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{$action})) {
 584         die_error(undef, "Unknown action");
 585 }
 586 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 587     !$project) {
 588         die_error(undef, "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(undef, "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                 $commit_id,
2130                 "--",
2131                 or die_error(undef, "Open git-rev-list failed");
2132         %co = parse_commit_text(<$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(undef, "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 sub die_error {
2677         my $status = shift || "403 Forbidden";
2678         my $error = shift || "Malformed query, file missing or permission denied";
2679
2680         git_header_html($status);
2681         print <<EOF;
2682 <div class="page_body">
2683 <br /><br />
2684 $status - $error
2685 <br />
2686 </div>
2687 EOF
2688         git_footer_html();
2689         exit;
2690 }
2691
2692 ## ----------------------------------------------------------------------
2693 ## functions printing or outputting HTML: navigation
2694
2695 sub git_print_page_nav {
2696         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2697         $extra = '' if !defined $extra; # pager or formats
2698
2699         my @navs = qw(summary shortlog log commit commitdiff tree);
2700         if ($suppress) {
2701                 @navs = grep { $_ ne $suppress } @navs;
2702         }
2703
2704         my %arg = map { $_ => {action=>$_} } @navs;
2705         if (defined $head) {
2706                 for (qw(commit commitdiff)) {
2707                         $arg{$_}{'hash'} = $head;
2708                 }
2709                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2710                         for (qw(shortlog log)) {
2711                                 $arg{$_}{'hash'} = $head;
2712                         }
2713                 }
2714         }
2715         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2716         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2717
2718         print "<div class=\"page_nav\">\n" .
2719                 (join " | ",
2720                  map { $_ eq $current ?
2721                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2722                  } @navs);
2723         print "<br/>\n$extra<br/>\n" .
2724               "</div>\n";
2725 }
2726
2727 sub format_paging_nav {
2728         my ($action, $hash, $head, $page, $has_next_link) = @_;
2729         my $paging_nav;
2730
2731
2732         if ($hash ne $head || $page) {
2733                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2734         } else {
2735                 $paging_nav .= "HEAD";
2736         }
2737
2738         if ($page > 0) {
2739                 $paging_nav .= " &sdot; " .
2740                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2741                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2742         } else {
2743                 $paging_nav .= " &sdot; prev";
2744         }
2745
2746         if ($has_next_link) {
2747                 $paging_nav .= " &sdot; " .
2748                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2749                                  -accesskey => "n", -title => "Alt-n"}, "next");
2750         } else {
2751                 $paging_nav .= " &sdot; next";
2752         }
2753
2754         return $paging_nav;
2755 }
2756
2757 ## ......................................................................
2758 ## functions printing or outputting HTML: div
2759
2760 sub git_print_header_div {
2761         my ($action, $title, $hash, $hash_base) = @_;
2762         my %args = ();
2763
2764         $args{'action'} = $action;
2765         $args{'hash'} = $hash if $hash;
2766         $args{'hash_base'} = $hash_base if $hash_base;
2767
2768         print "<div class=\"header\">\n" .
2769               $cgi->a({-href => href(%args), -class => "title"},
2770               $title ? $title : $action) .
2771               "\n</div>\n";
2772 }
2773
2774 #sub git_print_authorship (\%) {
2775 sub git_print_authorship {
2776         my $co = shift;
2777
2778         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2779         print "<div class=\"author_date\">" .
2780               esc_html($co->{'author_name'}) .
2781               " [$ad{'rfc2822'}";
2782         if ($ad{'hour_local'} < 6) {
2783                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2784                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2785         } else {
2786                 printf(" (%02d:%02d %s)",
2787                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2788         }
2789         print "]</div>\n";
2790 }
2791
2792 sub git_print_page_path {
2793         my $name = shift;
2794         my $type = shift;
2795         my $hb = shift;
2796
2797
2798         print "<div class=\"page_path\">";
2799         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2800                       -title => 'tree root'}, to_utf8("[$project]"));
2801         print " / ";
2802         if (defined $name) {
2803                 my @dirname = split '/', $name;
2804                 my $basename = pop @dirname;
2805                 my $fullname = '';
2806
2807                 foreach my $dir (@dirname) {
2808                         $fullname .= ($fullname ? '/' : '') . $dir;
2809                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2810                                                      hash_base=>$hb),
2811                                       -title => $fullname}, esc_path($dir));
2812                         print " / ";
2813                 }
2814                 if (defined $type && $type eq 'blob') {
2815                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2816                                                      hash_base=>$hb),
2817                                       -title => $name}, esc_path($basename));
2818                 } elsif (defined $type && $type eq 'tree') {
2819                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2820                                                      hash_base=>$hb),
2821                                       -title => $name}, esc_path($basename));
2822                         print " / ";
2823                 } else {
2824                         print esc_path($basename);
2825                 }
2826         }
2827         print "<br/></div>\n";
2828 }
2829
2830 # sub git_print_log (\@;%) {
2831 sub git_print_log ($;%) {
2832         my $log = shift;
2833         my %opts = @_;
2834
2835         if ($opts{'-remove_title'}) {
2836                 # remove title, i.e. first line of log
2837                 shift @$log;
2838         }
2839         # remove leading empty lines
2840         while (defined $log->[0] && $log->[0] eq "") {
2841                 shift @$log;
2842         }
2843
2844         # print log
2845         my $signoff = 0;
2846         my $empty = 0;
2847         foreach my $line (@$log) {
2848                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2849                         $signoff = 1;
2850                         $empty = 0;
2851                         if (! $opts{'-remove_signoff'}) {
2852                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2853                                 next;
2854                         } else {
2855                                 # remove signoff lines
2856                                 next;
2857                         }
2858                 } else {
2859                         $signoff = 0;
2860                 }
2861
2862                 # print only one empty line
2863                 # do not print empty line after signoff
2864                 if ($line eq "") {
2865                         next if ($empty || $signoff);
2866                         $empty = 1;
2867                 } else {
2868                         $empty = 0;
2869                 }
2870
2871                 print format_log_line_html($line) . "<br/>\n";
2872         }
2873
2874         if ($opts{'-final_empty_line'}) {
2875                 # end with single empty line
2876                 print "<br/>\n" unless $empty;
2877         }
2878 }
2879
2880 # return link target (what link points to)
2881 sub git_get_link_target {
2882         my $hash = shift;
2883         my $link_target;
2884
2885         # read link
2886         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2887                 or return;
2888         {
2889                 local $/;
2890                 $link_target = <$fd>;
2891         }
2892         close $fd
2893                 or return;
2894
2895         return $link_target;
2896 }
2897
2898 # given link target, and the directory (basedir) the link is in,
2899 # return target of link relative to top directory (top tree);
2900 # return undef if it is not possible (including absolute links).
2901 sub normalize_link_target {
2902         my ($link_target, $basedir, $hash_base) = @_;
2903
2904         # we can normalize symlink target only if $hash_base is provided
2905         return unless $hash_base;
2906
2907         # absolute symlinks (beginning with '/') cannot be normalized
2908         return if (substr($link_target, 0, 1) eq '/');
2909
2910         # normalize link target to path from top (root) tree (dir)
2911         my $path;
2912         if ($basedir) {
2913                 $path = $basedir . '/' . $link_target;
2914         } else {
2915                 # we are in top (root) tree (dir)
2916                 $path = $link_target;
2917         }
2918
2919         # remove //, /./, and /../
2920         my @path_parts;
2921         foreach my $part (split('/', $path)) {
2922                 # discard '.' and ''
2923                 next if (!$part || $part eq '.');
2924                 # handle '..'
2925                 if ($part eq '..') {
2926                         if (@path_parts) {
2927                                 pop @path_parts;
2928                         } else {
2929                                 # link leads outside repository (outside top dir)
2930                                 return;
2931                         }
2932                 } else {
2933                         push @path_parts, $part;
2934                 }
2935         }
2936         $path = join('/', @path_parts);
2937
2938         return $path;
2939 }
2940
2941 # print tree entry (row of git_tree), but without encompassing <tr> element
2942 sub git_print_tree_entry {
2943         my ($t, $basedir, $hash_base, $have_blame) = @_;
2944
2945         my %base_key = ();
2946         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2947
2948         # The format of a table row is: mode list link.  Where mode is
2949         # the mode of the entry, list is the name of the entry, an href,
2950         # and link is the action links of the entry.
2951
2952         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2953         if ($t->{'type'} eq "blob") {
2954                 print "<td class=\"list\">" .
2955                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2956                                                file_name=>"$basedir$t->{'name'}", %base_key),
2957                                 -class => "list"}, esc_path($t->{'name'}));
2958                 if (S_ISLNK(oct $t->{'mode'})) {
2959                         my $link_target = git_get_link_target($t->{'hash'});
2960                         if ($link_target) {
2961                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2962                                 if (defined $norm_target) {
2963                                         print " -> " .
2964                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2965                                                                      file_name=>$norm_target),
2966                                                        -title => $norm_target}, esc_path($link_target));
2967                                 } else {
2968                                         print " -> " . esc_path($link_target);
2969                                 }
2970                         }
2971                 }
2972                 print "</td>\n";
2973                 print "<td class=\"link\">";
2974                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2975                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2976                               "blob");
2977                 if ($have_blame) {
2978                         print " | " .
2979                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2980                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2981                                       "blame");
2982                 }
2983                 if (defined $hash_base) {
2984                         print " | " .
2985                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2986                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2987                                       "history");
2988                 }
2989                 print " | " .
2990                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2991                                                file_name=>"$basedir$t->{'name'}")},
2992                                 "raw");
2993                 print "</td>\n";
2994
2995         } elsif ($t->{'type'} eq "tree") {
2996                 print "<td class=\"list\">";
2997                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2998                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2999                               esc_path($t->{'name'}));
3000                 print "</td>\n";
3001                 print "<td class=\"link\">";
3002                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3003                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3004                               "tree");
3005                 if (defined $hash_base) {
3006                         print " | " .
3007                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3008                                                      file_name=>"$basedir$t->{'name'}")},
3009                                       "history");
3010                 }
3011                 print "</td>\n";
3012         } else {
3013                 # unknown object: we can only present history for it
3014                 # (this includes 'commit' object, i.e. submodule support)
3015                 print "<td class=\"list\">" .
3016                       esc_path($t->{'name'}) .
3017                       "</td>\n";
3018                 print "<td class=\"link\">";
3019                 if (defined $hash_base) {
3020                         print $cgi->a({-href => href(action=>"history",
3021                                                      hash_base=>$hash_base,
3022                                                      file_name=>"$basedir$t->{'name'}")},
3023                                       "history");
3024                 }
3025                 print "</td>\n";
3026         }
3027 }
3028
3029 ## ......................................................................
3030 ## functions printing large fragments of HTML
3031
3032 # get pre-image filenames for merge (combined) diff
3033 sub fill_from_file_info {
3034         my ($diff, @parents) = @_;
3035
3036         $diff->{'from_file'} = [ ];
3037         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3038         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3039                 if ($diff->{'status'}[$i] eq 'R' ||
3040                     $diff->{'status'}[$i] eq 'C') {
3041                         $diff->{'from_file'}[$i] =
3042                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3043                 }
3044         }
3045
3046         return $diff;
3047 }
3048
3049 # is current raw difftree line of file deletion
3050 sub is_deleted {
3051         my $diffinfo = shift;
3052
3053         return $diffinfo->{'to_id'} eq ('0' x 40);
3054 }
3055
3056 # does patch correspond to [previous] difftree raw line
3057 # $diffinfo  - hashref of parsed raw diff format
3058 # $patchinfo - hashref of parsed patch diff format
3059 #              (the same keys as in $diffinfo)
3060 sub is_patch_split {
3061         my ($diffinfo, $patchinfo) = @_;
3062
3063         return defined $diffinfo && defined $patchinfo
3064                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3065 }
3066
3067
3068 sub git_difftree_body {
3069         my ($difftree, $hash, @parents) = @_;
3070         my ($parent) = $parents[0];
3071         my ($have_blame) = gitweb_check_feature('blame');
3072         print "<div class=\"list_head\">\n";
3073         if ($#{$difftree} > 10) {
3074                 print(($#{$difftree} + 1) . " files changed:\n");
3075         }
3076         print "</div>\n";
3077
3078         print "<table class=\"" .
3079               (@parents > 1 ? "combined " : "") .
3080               "diff_tree\">\n";
3081
3082         # header only for combined diff in 'commitdiff' view
3083         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3084         if ($has_header) {
3085                 # table header
3086                 print "<thead><tr>\n" .
3087                        "<th></th><th></th>\n"; # filename, patchN link
3088                 for (my $i = 0; $i < @parents; $i++) {
3089                         my $par = $parents[$i];
3090                         print "<th>" .
3091                               $cgi->a({-href => href(action=>"commitdiff",
3092                                                      hash=>$hash, hash_parent=>$par),
3093                                        -title => 'commitdiff to parent number ' .
3094                                                   ($i+1) . ': ' . substr($par,0,7)},
3095                                       $i+1) .
3096                               "&nbsp;</th>\n";
3097                 }
3098                 print "</tr></thead>\n<tbody>\n";
3099         }
3100
3101         my $alternate = 1;
3102         my $patchno = 0;
3103         foreach my $line (@{$difftree}) {
3104                 my $diff = parsed_difftree_line($line);
3105
3106                 if ($alternate) {
3107                         print "<tr class=\"dark\">\n";
3108                 } else {
3109                         print "<tr class=\"light\">\n";
3110                 }
3111                 $alternate ^= 1;
3112
3113                 if (exists $diff->{'nparents'}) { # combined diff
3114
3115                         fill_from_file_info($diff, @parents)
3116                                 unless exists $diff->{'from_file'};
3117
3118                         if (!is_deleted($diff)) {
3119                                 # file exists in the result (child) commit
3120                                 print "<td>" .
3121                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3122                                                              file_name=>$diff->{'to_file'},
3123                                                              hash_base=>$hash),
3124                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3125                                       "</td>\n";
3126                         } else {
3127                                 print "<td>" .
3128                                       esc_path($diff->{'to_file'}) .
3129                                       "</td>\n";
3130                         }
3131
3132                         if ($action eq 'commitdiff') {
3133                                 # link to patch
3134                                 $patchno++;
3135                                 print "<td class=\"link\">" .
3136                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3137                                       " | " .
3138                                       "</td>\n";
3139                         }
3140
3141                         my $has_history = 0;
3142                         my $not_deleted = 0;
3143                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3144                                 my $hash_parent = $parents[$i];
3145                                 my $from_hash = $diff->{'from_id'}[$i];
3146                                 my $from_path = $diff->{'from_file'}[$i];
3147                                 my $status = $diff->{'status'}[$i];
3148
3149                                 $has_history ||= ($status ne 'A');
3150                                 $not_deleted ||= ($status ne 'D');
3151
3152                                 if ($status eq 'A') {
3153                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3154                                 } elsif ($status eq 'D') {
3155                                         print "<td class=\"link\">" .
3156                                               $cgi->a({-href => href(action=>"blob",
3157                                                                      hash_base=>$hash,
3158                                                                      hash=>$from_hash,
3159                                                                      file_name=>$from_path)},
3160                                                       "blob" . ($i+1)) .
3161                                               " | </td>\n";
3162                                 } else {
3163                                         if ($diff->{'to_id'} eq $from_hash) {
3164                                                 print "<td class=\"link nochange\">";
3165                                         } else {
3166                                                 print "<td class=\"link\">";
3167                                         }
3168                                         print $cgi->a({-href => href(action=>"blobdiff",
3169                                                                      hash=>$diff->{'to_id'},
3170                                                                      hash_parent=>$from_hash,
3171                                                                      hash_base=>$hash,
3172                                                                      hash_parent_base=>$hash_parent,
3173                                                                      file_name=>$diff->{'to_file'},
3174                                                                      file_parent=>$from_path)},
3175                                                       "diff" . ($i+1)) .
3176                                               " | </td>\n";
3177                                 }
3178                         }
3179
3180                         print "<td class=\"link\">";
3181                         if ($not_deleted) {
3182                                 print $cgi->a({-href => href(action=>"blob",
3183                                                              hash=>$diff->{'to_id'},
3184                                                              file_name=>$diff->{'to_file'},
3185                                                              hash_base=>$hash)},
3186                                               "blob");
3187                                 print " | " if ($has_history);
3188                         }
3189                         if ($has_history) {
3190                                 print $cgi->a({-href => href(action=>"history",
3191                                                              file_name=>$diff->{'to_file'},
3192                                                              hash_base=>$hash)},
3193                                               "history");
3194                         }
3195                         print "</td>\n";
3196
3197                         print "</tr>\n";
3198                         next; # instead of 'else' clause, to avoid extra indent
3199                 }
3200                 # else ordinary diff
3201
3202                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3203                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3204                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3205                         $to_mode_oct = oct $diff->{'to_mode'};
3206                         if (S_ISREG($to_mode_oct)) { # only for regular file
3207                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3208                         }
3209                         $to_file_type = file_type($diff->{'to_mode'});
3210                 }
3211                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3212                         $from_mode_oct = oct $diff->{'from_mode'};
3213                         if (S_ISREG($to_mode_oct)) { # only for regular file
3214                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3215                         }
3216                         $from_file_type = file_type($diff->{'from_mode'});
3217                 }
3218
3219                 if ($diff->{'status'} eq "A") { # created
3220                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3221                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3222                         $mode_chng   .= "]</span>";
3223                         print "<td>";
3224                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3225                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3226                                       -class => "list"}, esc_path($diff->{'file'}));
3227                         print "</td>\n";
3228                         print "<td>$mode_chng</td>\n";
3229                         print "<td class=\"link\">";
3230                         if ($action eq 'commitdiff') {
3231                                 # link to patch
3232                                 $patchno++;
3233                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3234                                 print " | ";
3235                         }
3236                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3237                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3238                                       "blob");
3239                         print "</td>\n";
3240
3241                 } elsif ($diff->{'status'} eq "D") { # deleted
3242                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3243                         print "<td>";
3244                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3245                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3246                                        -class => "list"}, esc_path($diff->{'file'}));
3247                         print "</td>\n";
3248                         print "<td>$mode_chng</td>\n";
3249                         print "<td class=\"link\">";
3250                         if ($action eq 'commitdiff') {
3251                                 # link to patch
3252                                 $patchno++;
3253                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3254                                 print " | ";
3255                         }
3256                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3257                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3258                                       "blob") . " | ";
3259                         if ($have_blame) {
3260                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3261                                                              file_name=>$diff->{'file'})},
3262                                               "blame") . " | ";
3263                         }
3264                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3265                                                      file_name=>$diff->{'file'})},
3266                                       "history");
3267                         print "</td>\n";
3268
3269                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3270                         my $mode_chnge = "";
3271                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3272                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3273                                 if ($from_file_type ne $to_file_type) {
3274                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3275                                 }
3276                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3277                                         if ($from_mode_str && $to_mode_str) {
3278                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3279                                         } elsif ($to_mode_str) {
3280                                                 $mode_chnge .= " mode: $to_mode_str";
3281                                         }
3282                                 }
3283                                 $mode_chnge .= "]</span>\n";
3284                         }
3285                         print "<td>";
3286                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3287                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3288                                       -class => "list"}, esc_path($diff->{'file'}));
3289                         print "</td>\n";
3290                         print "<td>$mode_chnge</td>\n";
3291                         print "<td class=\"link\">";
3292                         if ($action eq 'commitdiff') {
3293                                 # link to patch
3294                                 $patchno++;
3295                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3296                                       " | ";
3297                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3298                                 # "commit" view and modified file (not onlu mode changed)
3299                                 print $cgi->a({-href => href(action=>"blobdiff",
3300                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3301                                                              hash_base=>$hash, hash_parent_base=>$parent,
3302                                                              file_name=>$diff->{'file'})},
3303                                               "diff") .
3304                                       " | ";
3305                         }
3306                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3307                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3308                                        "blob") . " | ";
3309                         if ($have_blame) {
3310                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3311                                                              file_name=>$diff->{'file'})},
3312                                               "blame") . " | ";
3313                         }
3314                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3315                                                      file_name=>$diff->{'file'})},
3316                                       "history");
3317                         print "</td>\n";
3318
3319                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3320                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3321                         my $nstatus = $status_name{$diff->{'status'}};
3322                         my $mode_chng = "";
3323                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3324                                 # mode also for directories, so we cannot use $to_mode_str
3325                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3326                         }
3327                         print "<td>" .
3328                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3329                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3330                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3331                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3332                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3333                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3334                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3335                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3336                               "<td class=\"link\">";
3337                         if ($action eq 'commitdiff') {
3338                                 # link to patch
3339                                 $patchno++;
3340                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3341                                       " | ";
3342                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3343                                 # "commit" view and modified file (not only pure rename or copy)
3344                                 print $cgi->a({-href => href(action=>"blobdiff",
3345                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3346                                                              hash_base=>$hash, hash_parent_base=>$parent,
3347                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3348                                               "diff") .
3349                                       " | ";
3350                         }
3351                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3352                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3353                                       "blob") . " | ";
3354                         if ($have_blame) {
3355                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3356                                                              file_name=>$diff->{'to_file'})},
3357                                               "blame") . " | ";
3358                         }
3359                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3360                                                     file_name=>$diff->{'to_file'})},
3361                                       "history");
3362                         print "</td>\n";
3363
3364                 } # we should not encounter Unmerged (U) or Unknown (X) status
3365                 print "</tr>\n";
3366         }
3367         print "</tbody>" if $has_header;
3368         print "</table>\n";
3369 }
3370
3371 sub git_patchset_body {
3372         my ($fd, $difftree, $hash, @hash_parents) = @_;
3373         my ($hash_parent) = $hash_parents[0];
3374
3375         my $is_combined = (@hash_parents > 1);
3376         my $patch_idx = 0;
3377         my $patch_number = 0;
3378         my $patch_line;
3379         my $diffinfo;
3380         my $to_name;
3381         my (%from, %to);
3382
3383         print "<div class=\"patchset\">\n";
3384
3385         # skip to first patch
3386         while ($patch_line = <$fd>) {
3387                 chomp $patch_line;
3388
3389                 last if ($patch_line =~ m/^diff /);
3390         }
3391
3392  PATCH:
3393         while ($patch_line) {
3394
3395                 # parse "git diff" header line
3396                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3397                         # $1 is from_name, which we do not use
3398                         $to_name = unquote($2);
3399                         $to_name =~ s!^b/!!;
3400                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3401                         # $1 is 'cc' or 'combined', which we do not use
3402                         $to_name = unquote($2);
3403                 } else {
3404                         $to_name = undef;
3405                 }
3406
3407                 # check if current patch belong to current raw line
3408                 # and parse raw git-diff line if needed
3409                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3410                         # this is continuation of a split patch
3411                         print "<div class=\"patch cont\">\n";
3412                 } else {
3413                         # advance raw git-diff output if needed
3414                         $patch_idx++ if defined $diffinfo;
3415
3416                         # read and prepare patch information
3417                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3418
3419                         # compact combined diff output can have some patches skipped
3420                         # find which patch (using pathname of result) we are at now;
3421                         if ($is_combined) {
3422                                 while ($to_name ne $diffinfo->{'to_file'}) {
3423                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3424                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3425                                               "</div>\n";  # class="patch"
3426
3427                                         $patch_idx++;
3428                                         $patch_number++;
3429
3430                                         last if $patch_idx > $#$difftree;
3431                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3432                                 }
3433                         }
3434
3435                         # modifies %from, %to hashes
3436                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3437
3438                         # this is first patch for raw difftree line with $patch_idx index
3439                         # we index @$difftree array from 0, but number patches from 1
3440                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3441                 }
3442
3443                 # git diff header
3444                 #assert($patch_line =~ m/^diff /) if DEBUG;
3445                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3446                 $patch_number++;
3447                 # print "git diff" header
3448                 print format_git_diff_header_line($patch_line, $diffinfo,
3449                                                   \%from, \%to);
3450
3451                 # print extended diff header
3452                 print "<div class=\"diff extended_header\">\n";
3453         EXTENDED_HEADER:
3454                 while ($patch_line = <$fd>) {
3455                         chomp $patch_line;
3456
3457                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3458
3459                         print format_extended_diff_header_line($patch_line, $diffinfo,
3460                                                                \%from, \%to);
3461                 }
3462                 print "</div>\n"; # class="diff extended_header"
3463
3464                 # from-file/to-file diff header
3465                 if (! $patch_line) {
3466                         print "</div>\n"; # class="patch"
3467                         last PATCH;
3468                 }
3469                 next PATCH if ($patch_line =~ m/^diff /);
3470                 #assert($patch_line =~ m/^---/) if DEBUG;
3471
3472                 my $last_patch_line = $patch_line;
3473                 $patch_line = <$fd>;
3474                 chomp $patch_line;
3475                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3476
3477                 print format_diff_from_to_header($last_patch_line, $patch_line,
3478                                                  $diffinfo, \%from, \%to,
3479                                                  @hash_parents);
3480
3481                 # the patch itself
3482         LINE:
3483                 while ($patch_line = <$fd>) {
3484                         chomp $patch_line;
3485
3486                         next PATCH if ($patch_line =~ m/^diff /);
3487
3488                         print format_diff_line($patch_line, \%from, \%to);
3489                 }
3490
3491         } continue {
3492                 print "</div>\n"; # class="patch"
3493         }
3494
3495         # for compact combined (--cc) format, with chunk and patch simpliciaction
3496         # patchset might be empty, but there might be unprocessed raw lines
3497         for (++$patch_idx if $patch_number > 0;
3498              $patch_idx < @$difftree;
3499              ++$patch_idx) {
3500                 # read and prepare patch information
3501                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3502
3503                 # generate anchor for "patch" links in difftree / whatchanged part
3504                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3505                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3506                       "</div>\n";  # class="patch"
3507
3508                 $patch_number++;
3509         }
3510
3511         if ($patch_number == 0) {
3512                 if (@hash_parents > 1) {
3513                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3514                 } else {
3515                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3516                 }
3517         }
3518
3519         print "</div>\n"; # class="patchset"
3520 }
3521
3522 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3523
3524 # fills project list info (age, description, owner, forks) for each
3525 # project in the list, removing invalid projects from returned list
3526 # NOTE: modifies $projlist, but does not remove entries from it
3527 sub fill_project_list_info {
3528         my ($projlist, $check_forks) = @_;
3529         my @projects;
3530
3531  PROJECT:
3532         foreach my $pr (@$projlist) {
3533                 my (@activity) = git_get_last_activity($pr->{'path'});
3534                 unless (@activity) {
3535                         next PROJECT;
3536                 }
3537                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3538                 if (!defined $pr->{'descr'}) {
3539                         my $descr = git_get_project_description($pr->{'path'}) || "";
3540                         $descr = to_utf8($descr);
3541                         $pr->{'descr_long'} = $descr;
3542                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3543                 }
3544                 if (!defined $pr->{'owner'}) {
3545                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3546                 }
3547                 if ($check_forks) {
3548                         my $pname = $pr->{'path'};
3549                         if (($pname =~ s/\.git$//) &&
3550                             ($pname !~ /\/$/) &&
3551                             (-d "$projectroot/$pname")) {
3552                                 $pr->{'forks'} = "-d $projectroot/$pname";
3553                         }       else {
3554                                 $pr->{'forks'} = 0;
3555                         }
3556                 }
3557                 push @projects, $pr;
3558         }
3559
3560         return @projects;
3561 }
3562
3563 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3564 # (changing $list), or generating 'sort by $name' replay link otherwise
3565 sub print_sort_th {
3566         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3567         $key    ||= $name;
3568         $header ||= ucfirst($name);
3569
3570         if ($order eq $name) {
3571                 if ($str_sort) {
3572                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3573                 } else {
3574                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3575                 }
3576                 print "<th>$header</th>\n";
3577         } else {
3578                 print "<th>" .
3579                       $cgi->a({-href => href(-replay=>1, order=>$name),
3580                                -class => "header"}, $header) .
3581                       "</th>\n";
3582         }
3583 }
3584
3585 sub print_sort_th_str {
3586         print_sort_th(1, @_);
3587 }
3588
3589 sub print_sort_th_num {
3590         print_sort_th(0, @_);
3591 }
3592
3593 sub git_project_list_body {
3594         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3595
3596         my ($check_forks) = gitweb_check_feature('forks');
3597         my @projects = fill_project_list_info($projlist, $check_forks);
3598
3599         $order ||= $default_projects_order;
3600         $from = 0 unless defined $from;
3601         $to = $#projects if (!defined $to || $#projects < $to);
3602
3603         print "<table class=\"project_list\">\n";
3604         unless ($no_header) {
3605                 print "<tr>\n";
3606                 if ($check_forks) {
3607                         print "<th></th>\n";
3608                 }
3609                 print_sort_th_str('project', $order, 'path',
3610                                   'Project', \@projects);
3611                 print_sort_th_str('descr', $order, 'descr_long',
3612                                   'Description', \@projects);
3613                 print_sort_th_str('owner', $order, 'owner',
3614                                   'Owner', \@projects);
3615                 print_sort_th_num('age', $order, 'age',
3616                                   'Last Change', \@projects);
3617                 print "<th></th>\n" . # for links
3618                       "</tr>\n";
3619         }
3620         my $alternate = 1;
3621         for (my $i = $from; $i <= $to; $i++) {
3622                 my $pr = $projects[$i];
3623                 if ($alternate) {
3624                         print "<tr class=\"dark\">\n";
3625                 } else {
3626                         print "<tr class=\"light\">\n";
3627                 }
3628                 $alternate ^= 1;
3629                 if ($check_forks) {
3630                         print "<td>";
3631                         if ($pr->{'forks'}) {
3632                                 print "<!-- $pr->{'forks'} -->\n";
3633                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3634                         }
3635                         print "</td>\n";
3636                 }
3637                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3638                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3639                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3640                                         -class => "list", -title => $pr->{'descr_long'}},
3641                                         esc_html($pr->{'descr'})) . "</td>\n" .
3642                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3643                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3644                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3645                       "<td class=\"link\">" .
3646                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3647                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3648                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3649                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3650                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3651                       "</td>\n" .
3652                       "</tr>\n";
3653         }
3654         if (defined $extra) {
3655                 print "<tr>\n";
3656                 if ($check_forks) {
3657                         print "<td></td>\n";
3658                 }
3659                 print "<td colspan=\"5\">$extra</td>\n" .
3660                       "</tr>\n";
3661         }
3662         print "</table>\n";
3663 }
3664
3665 sub git_shortlog_body {
3666         # uses global variable $project
3667         my ($commitlist, $from, $to, $refs, $extra) = @_;
3668
3669         $from = 0 unless defined $from;
3670         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3671
3672         print "<table class=\"shortlog\">\n";
3673         my $alternate = 1;
3674         for (my $i = $from; $i <= $to; $i++) {
3675                 my %co = %{$commitlist->[$i]};
3676                 my $commit = $co{'id'};
3677                 my $ref = format_ref_marker($refs, $commit);
3678                 if ($alternate) {
3679                         print "<tr class=\"dark\">\n";
3680                 } else {
3681                         print "<tr class=\"light\">\n";
3682                 }
3683                 $alternate ^= 1;
3684                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3685                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3686                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3687                       "<td><i>" . $author . "</i></td>\n" .
3688                       "<td>";
3689                 print format_subject_html($co{'title'}, $co{'title_short'},
3690                                           href(action=>"commit", hash=>$commit), $ref);
3691                 print "</td>\n" .
3692                       "<td class=\"link\">" .
3693                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3694                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3695                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3696                 my $snapshot_links = format_snapshot_links($commit);
3697                 if (defined $snapshot_links) {
3698                         print " | " . $snapshot_links;
3699                 }
3700                 print "</td>\n" .
3701                       "</tr>\n";
3702         }
3703         if (defined $extra) {
3704                 print "<tr>\n" .
3705                       "<td colspan=\"4\">$extra</td>\n" .
3706                       "</tr>\n";
3707         }
3708         print "</table>\n";
3709 }
3710
3711 sub git_history_body {
3712         # Warning: assumes constant type (blob or tree) during history
3713         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3714
3715         $from = 0 unless defined $from;
3716         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3717
3718         print "<table class=\"history\">\n";
3719         my $alternate = 1;
3720         for (my $i = $from; $i <= $to; $i++) {
3721                 my %co = %{$commitlist->[$i]};
3722                 if (!%co) {
3723                         next;
3724                 }
3725                 my $commit = $co{'id'};
3726
3727                 my $ref = format_ref_marker($refs, $commit);
3728
3729                 if ($alternate) {
3730                         print "<tr class=\"dark\">\n";
3731                 } else {
3732                         print "<tr class=\"light\">\n";
3733                 }
3734                 $alternate ^= 1;
3735         # shortlog uses      chop_str($co{'author_name'}, 10)
3736                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3737                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3738                       "<td><i>" . $author . "</i></td>\n" .
3739                       "<td>";
3740                 # originally git_history used chop_str($co{'title'}, 50)
3741                 print format_subject_html($co{'title'}, $co{'title_short'},
3742                                           href(action=>"commit", hash=>$commit), $ref);
3743                 print "</td>\n" .
3744                       "<td class=\"link\">" .
3745                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3746                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3747
3748                 if ($ftype eq 'blob') {
3749                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3750                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3751                         if (defined $blob_current && defined $blob_parent &&
3752                                         $blob_current ne $blob_parent) {
3753                                 print " | " .
3754                                         $cgi->a({-href => href(action=>"blobdiff",
3755                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3756                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3757                                                                file_name=>$file_name)},
3758                                                 "diff to current");
3759                         }
3760                 }
3761                 print "</td>\n" .
3762                       "</tr>\n";
3763         }
3764         if (defined $extra) {
3765                 print "<tr>\n" .
3766                       "<td colspan=\"4\">$extra</td>\n" .
3767                       "</tr>\n";
3768         }
3769         print "</table>\n";
3770 }
3771
3772 sub git_tags_body {
3773         # uses global variable $project
3774         my ($taglist, $from, $to, $extra) = @_;
3775         $from = 0 unless defined $from;
3776         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3777
3778         print "<table class=\"tags\">\n";
3779         my $alternate = 1;
3780         for (my $i = $from; $i <= $to; $i++) {
3781                 my $entry = $taglist->[$i];
3782                 my %tag = %$entry;
3783                 my $comment = $tag{'subject'};
3784                 my $comment_short;
3785                 if (defined $comment) {
3786                         $comment_short = chop_str($comment, 30, 5);
3787                 }
3788                 if ($alternate) {
3789                         print "<tr class=\"dark\">\n";
3790                 } else {
3791                         print "<tr class=\"light\">\n";
3792                 }
3793                 $alternate ^= 1;
3794                 if (defined $tag{'age'}) {
3795                         print "<td><i>$tag{'age'}</i></td>\n";
3796                 } else {
3797                         print "<td></td>\n";
3798                 }
3799                 print "<td>" .
3800                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3801                                -class => "list name"}, esc_html($tag{'name'})) .
3802                       "</td>\n" .
3803                       "<td>";
3804                 if (defined $comment) {
3805                         print format_subject_html($comment, $comment_short,
3806                                                   href(action=>"tag", hash=>$tag{'id'}));
3807                 }
3808                 print "</td>\n" .
3809                       "<td class=\"selflink\">";
3810                 if ($tag{'type'} eq "tag") {
3811                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3812                 } else {
3813                         print "&nbsp;";
3814                 }
3815                 print "</td>\n" .
3816                       "<td class=\"link\">" . " | " .
3817                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3818                 if ($tag{'reftype'} eq "commit") {
3819                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3820                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3821                 } elsif ($tag{'reftype'} eq "blob") {
3822                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3823                 }
3824                 print "</td>\n" .
3825                       "</tr>";
3826         }
3827         if (defined $extra) {
3828                 print "<tr>\n" .
3829                       "<td colspan=\"5\">$extra</td>\n" .
3830                       "</tr>\n";
3831         }
3832         print "</table>\n";
3833 }
3834
3835 sub git_heads_body {
3836         # uses global variable $project
3837         my ($headlist, $head, $from, $to, $extra) = @_;
3838         $from = 0 unless defined $from;
3839         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3840
3841         print "<table class=\"heads\">\n";
3842         my $alternate = 1;
3843         for (my $i = $from; $i <= $to; $i++) {
3844                 my $entry = $headlist->[$i];
3845                 my %ref = %$entry;
3846                 my $curr = $ref{'id'} eq $head;
3847                 if ($alternate) {
3848                         print "<tr class=\"dark\">\n";
3849                 } else {
3850                         print "<tr class=\"light\">\n";
3851                 }
3852                 $alternate ^= 1;
3853                 print "<td><i>$ref{'age'}</i></td>\n" .
3854                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3855                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3856                                -class => "list name"},esc_html($ref{'name'})) .
3857                       "</td>\n" .
3858                       "<td class=\"link\">" .
3859                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3860                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3861                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3862                       "</td>\n" .
3863                       "</tr>";
3864         }
3865         if (defined $extra) {
3866                 print "<tr>\n" .
3867                       "<td colspan=\"3\">$extra</td>\n" .
3868                       "</tr>\n";
3869         }
3870         print "</table>\n";
3871 }
3872
3873 sub git_search_grep_body {
3874         my ($commitlist, $from, $to, $extra) = @_;
3875         $from = 0 unless defined $from;
3876         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3877
3878         print "<table class=\"commit_search\">\n";
3879         my $alternate = 1;
3880         for (my $i = $from; $i <= $to; $i++) {
3881                 my %co = %{$commitlist->[$i]};
3882                 if (!%co) {
3883                         next;
3884                 }
3885                 my $commit = $co{'id'};
3886                 if ($alternate) {
3887                         print "<tr class=\"dark\">\n";
3888                 } else {
3889                         print "<tr class=\"light\">\n";
3890                 }
3891                 $alternate ^= 1;
3892                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3893                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3894                       "<td><i>" . $author . "</i></td>\n" .
3895                       "<td>" .
3896                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3897                                -class => "list subject"},
3898                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3899                 my $comment = $co{'comment'};
3900                 foreach my $line (@$comment) {
3901                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3902                                 my ($lead, $match, $trail) = ($1, $2, $3);
3903                                 $match = chop_str($match, 70, 5, 'center');
3904                                 my $contextlen = int((80 - length($match))/2);
3905                                 $contextlen = 30 if ($contextlen > 30);
3906                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3907                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3908
3909                                 $lead  = esc_html($lead);
3910                                 $match = esc_html($match);
3911                                 $trail = esc_html($trail);
3912
3913                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3914                         }
3915                 }
3916                 print "</td>\n" .
3917                       "<td class=\"link\">" .
3918                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3919                       " | " .
3920                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3921                       " | " .
3922                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3923                 print "</td>\n" .
3924                       "</tr>\n";
3925         }
3926         if (defined $extra) {
3927                 print "<tr>\n" .
3928                       "<td colspan=\"3\">$extra</td>\n" .
3929                       "</tr>\n";
3930         }
3931         print "</table>\n";
3932 }
3933
3934 ## ======================================================================
3935 ## ======================================================================
3936 ## actions
3937
3938 sub git_project_list {
3939         my $order = $cgi->param('o');
3940         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3941                 die_error(undef, "Unknown order parameter");
3942         }
3943
3944         my @list = git_get_projects_list();
3945         if (!@list) {
3946                 die_error(undef, "No projects found");
3947         }
3948
3949         git_header_html();
3950         if (-f $home_text) {
3951                 print "<div class=\"index_include\">\n";
3952                 open (my $fd, $home_text);
3953                 print <$fd>;
3954                 close $fd;
3955                 print "</div>\n";
3956         }
3957         git_project_list_body(\@list, $order);
3958         git_footer_html();
3959 }
3960
3961 sub git_forks {
3962         my $order = $cgi->param('o');
3963         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3964                 die_error(undef, "Unknown order parameter");
3965         }
3966
3967         my @list = git_get_projects_list($project);
3968         if (!@list) {
3969                 die_error(undef, "No forks found");
3970         }
3971
3972         git_header_html();
3973         git_print_page_nav('','');
3974         git_print_header_div('summary', "$project forks");
3975         git_project_list_body(\@list, $order);
3976         git_footer_html();
3977 }
3978
3979 sub git_project_index {
3980         my @projects = git_get_projects_list($project);
3981
3982         print $cgi->header(
3983                 -type => 'text/plain',
3984                 -charset => 'utf-8',
3985                 -content_disposition => 'inline; filename="index.aux"');
3986
3987         foreach my $pr (@projects) {
3988                 if (!exists $pr->{'owner'}) {
3989                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3990                 }
3991
3992                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3993                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3994                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3995                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3996                 $path  =~ s/ /\+/g;
3997                 $owner =~ s/ /\+/g;
3998
3999                 print "$path $owner\n";
4000         }
4001 }
4002
4003 sub git_summary {
4004         my $descr = git_get_project_description($project) || "none";
4005         my %co = parse_commit("HEAD");
4006         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4007         my $head = $co{'id'};
4008
4009         my $owner = git_get_project_owner($project);
4010
4011         my $refs = git_get_references();
4012         # These get_*_list functions return one more to allow us to see if
4013         # there are more ...
4014         my @taglist  = git_get_tags_list(16);
4015         my @headlist = git_get_heads_list(16);
4016         my @forklist;
4017         my ($check_forks) = gitweb_check_feature('forks');
4018
4019         if ($check_forks) {
4020                 @forklist = git_get_projects_list($project);
4021         }
4022
4023         git_header_html();
4024         git_print_page_nav('summary','', $head);
4025
4026         print "<div class=\"title\">&nbsp;</div>\n";
4027         print "<table class=\"projects_list\">\n" .
4028               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4029               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4030         if (defined $cd{'rfc2822'}) {
4031                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4032         }
4033
4034         # use per project git URL list in $projectroot/$project/cloneurl
4035         # or make project git URL from git base URL and project name
4036         my $url_tag = "URL";
4037         my @url_list = git_get_project_url_list($project);
4038         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4039         foreach my $git_url (@url_list) {
4040                 next unless $git_url;
4041                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4042                 $url_tag = "";
4043         }
4044         print "</table>\n";
4045
4046         if (-s "$projectroot/$project/README.html") {
4047                 if (open my $fd, "$projectroot/$project/README.html") {
4048                         print "<div class=\"title\">readme</div>\n" .
4049                               "<div class=\"readme\">\n";
4050                         print $_ while (<$fd>);
4051                         print "\n</div>\n"; # class="readme"
4052                         close $fd;
4053                 }
4054         }
4055
4056         # we need to request one more than 16 (0..15) to check if
4057         # those 16 are all
4058         my @commitlist = $head ? parse_commits($head, 17) : ();
4059         if (@commitlist) {
4060                 git_print_header_div('shortlog');
4061                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4062                                   $#commitlist <=  15 ? undef :
4063                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4064         }
4065
4066         if (@taglist) {
4067                 git_print_header_div('tags');
4068                 git_tags_body(\@taglist, 0, 15,
4069                               $#taglist <=  15 ? undef :
4070                               $cgi->a({-href => href(action=>"tags")}, "..."));
4071         }
4072
4073         if (@headlist) {
4074                 git_print_header_div('heads');
4075                 git_heads_body(\@headlist, $head, 0, 15,
4076                                $#headlist <= 15 ? undef :
4077                                $cgi->a({-href => href(action=>"heads")}, "..."));
4078         }
4079
4080         if (@forklist) {
4081                 git_print_header_div('forks');
4082                 git_project_list_body(\@forklist, undef, 0, 15,
4083                                       $#forklist <= 15 ? undef :
4084                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4085                                       'noheader');
4086         }
4087
4088         git_footer_html();
4089 }
4090
4091 sub git_tag {
4092         my $head = git_get_head_hash($project);
4093         git_header_html();
4094         git_print_page_nav('','', $head,undef,$head);
4095         my %tag = parse_tag($hash);
4096
4097         if (! %tag) {
4098                 die_error(undef, "Unknown tag object");
4099         }
4100
4101         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4102         print "<div class=\"title_text\">\n" .
4103               "<table class=\"object_header\">\n" .
4104               "<tr>\n" .
4105               "<td>object</td>\n" .
4106               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4107                                $tag{'object'}) . "</td>\n" .
4108               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4109                                               $tag{'type'}) . "</td>\n" .
4110               "</tr>\n";
4111         if (defined($tag{'author'})) {
4112                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4113                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4114                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4115                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4116                         "</td></tr>\n";
4117         }
4118         print "</table>\n\n" .
4119               "</div>\n";
4120         print "<div class=\"page_body\">";
4121         my $comment = $tag{'comment'};
4122         foreach my $line (@$comment) {
4123                 chomp $line;
4124                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4125         }
4126         print "</div>\n";
4127         git_footer_html();
4128 }
4129
4130 sub git_blame {
4131         my $fd;
4132         my $ftype;
4133
4134         my ($have_blame) = gitweb_check_feature('blame');
4135         if (!$have_blame) {
4136                 die_error('403 Permission denied', "Permission denied");
4137         }
4138         die_error('404 Not Found', "File name not defined") if (!$file_name);
4139         $hash_base ||= git_get_head_hash($project);
4140         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4141         my %co = parse_commit($hash_base)
4142                 or die_error(undef, "Reading commit failed");
4143         if (!defined $hash) {
4144                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4145                         or die_error(undef, "Error looking up file");
4146         }
4147         $ftype = git_get_type($hash);
4148         if ($ftype !~ "blob") {
4149                 die_error('400 Bad Request', "Object is not a blob");
4150         }
4151         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4152               $file_name, $hash_base)
4153                 or die_error(undef, "Open git-blame failed");
4154         git_header_html();
4155         my $formats_nav =
4156                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4157                         "blob") .
4158                 " | " .
4159                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4160                         "history") .
4161                 " | " .
4162                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4163                         "HEAD");
4164         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4165         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4166         git_print_page_path($file_name, $ftype, $hash_base);
4167         my @rev_color = (qw(light2 dark2));
4168         my $num_colors = scalar(@rev_color);
4169         my $current_color = 0;
4170         my $last_rev;
4171         print <<HTML;
4172 <div class="page_body">
4173 <table class="blame">
4174 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4175 HTML
4176         my %metainfo = ();
4177         while (1) {
4178                 $_ = <$fd>;
4179                 last unless defined $_;
4180                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4181                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4182                 if (!exists $metainfo{$full_rev}) {
4183                         $metainfo{$full_rev} = {};
4184                 }
4185                 my $meta = $metainfo{$full_rev};
4186                 while (<$fd>) {
4187                         last if (s/^\t//);
4188                         if (/^(\S+) (.*)$/) {
4189                                 $meta->{$1} = $2;
4190                         }
4191                 }
4192                 my $data = $_;
4193                 chomp $data;
4194                 my $rev = substr($full_rev, 0, 8);
4195                 my $author = $meta->{'author'};
4196                 my %date = parse_date($meta->{'author-time'},
4197                                       $meta->{'author-tz'});
4198                 my $date = $date{'iso-tz'};
4199                 if ($group_size) {
4200                         $current_color = ++$current_color % $num_colors;
4201                 }
4202                 print "<tr class=\"$rev_color[$current_color]\">\n";
4203                 if ($group_size) {
4204                         print "<td class=\"sha1\"";
4205                         print " title=\"". esc_html($author) . ", $date\"";
4206                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4207                         print ">";
4208                         print $cgi->a({-href => href(action=>"commit",
4209                                                      hash=>$full_rev,
4210                                                      file_name=>$file_name)},
4211                                       esc_html($rev));
4212                         print "</td>\n";
4213                 }
4214                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4215                         or die_error(undef, "Open git-rev-parse failed");
4216                 my $parent_commit = <$dd>;
4217                 close $dd;
4218                 chomp($parent_commit);
4219                 my $blamed = href(action => 'blame',
4220                                   file_name => $meta->{'filename'},
4221                                   hash_base => $parent_commit);
4222                 print "<td class=\"linenr\">";
4223                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4224                                 -id => "l$lineno",
4225                                 -class => "linenr" },
4226                               esc_html($lineno));
4227                 print "</td>";
4228                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4229                 print "</tr>\n";
4230         }
4231         print "</table>\n";
4232         print "</div>";
4233         close $fd
4234                 or print "Reading blob failed\n";
4235         git_footer_html();
4236 }
4237
4238 sub git_tags {
4239         my $head = git_get_head_hash($project);
4240         git_header_html();
4241         git_print_page_nav('','', $head,undef,$head);
4242         git_print_header_div('summary', $project);
4243
4244         my @tagslist = git_get_tags_list();
4245         if (@tagslist) {
4246                 git_tags_body(\@tagslist);
4247         }
4248         git_footer_html();
4249 }
4250
4251 sub git_heads {
4252         my $head = git_get_head_hash($project);
4253         git_header_html();
4254         git_print_page_nav('','', $head,undef,$head);
4255         git_print_header_div('summary', $project);
4256
4257         my @headslist = git_get_heads_list();
4258         if (@headslist) {
4259                 git_heads_body(\@headslist, $head);
4260         }
4261         git_footer_html();
4262 }
4263
4264 sub git_blob_plain {
4265         my $type = shift;
4266         my $expires;
4267
4268         if (!defined $hash) {
4269                 if (defined $file_name) {
4270                         my $base = $hash_base || git_get_head_hash($project);
4271                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4272                                 or die_error(undef, "Error lookup file");
4273                 } else {
4274                         die_error(undef, "No file name defined");
4275                 }
4276         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4277                 # blobs defined by non-textual hash id's can be cached
4278                 $expires = "+1d";
4279         }
4280
4281         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4282                 or die_error(undef, "Open git-cat-file blob '$hash' failed");
4283
4284         # content-type (can include charset)
4285         $type = blob_contenttype($fd, $file_name, $type);
4286
4287         # "save as" filename, even when no $file_name is given
4288         my $save_as = "$hash";
4289         if (defined $file_name) {
4290                 $save_as = $file_name;
4291         } elsif ($type =~ m/^text\//) {
4292                 $save_as .= '.txt';
4293         }
4294
4295         print $cgi->header(
4296                 -type => $type,
4297                 -expires => $expires,
4298                 -content_disposition => 'inline; filename="' . $save_as . '"');
4299         undef $/;
4300         binmode STDOUT, ':raw';
4301         print <$fd>;
4302         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4303         $/ = "\n";
4304         close $fd;
4305 }
4306
4307 sub git_blob {
4308         my $expires;
4309
4310         if (!defined $hash) {
4311                 if (defined $file_name) {
4312                         my $base = $hash_base || git_get_head_hash($project);
4313                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4314                                 or die_error(undef, "Error lookup file");
4315                 } else {
4316                         die_error(undef, "No file name defined");
4317                 }
4318         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4319                 # blobs defined by non-textual hash id's can be cached
4320                 $expires = "+1d";
4321         }
4322
4323         my ($have_blame) = gitweb_check_feature('blame');
4324         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4325                 or die_error(undef, "Couldn't cat $file_name, $hash");
4326         my $mimetype = blob_mimetype($fd, $file_name);
4327         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4328                 close $fd;
4329                 return git_blob_plain($mimetype);
4330         }
4331         # we can have blame only for text/* mimetype
4332         $have_blame &&= ($mimetype =~ m!^text/!);
4333
4334         git_header_html(undef, $expires);
4335         my $formats_nav = '';
4336         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4337                 if (defined $file_name) {
4338                         if ($have_blame) {
4339                                 $formats_nav .=
4340                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4341                                                 "blame") .
4342                                         " | ";
4343                         }
4344                         $formats_nav .=
4345                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4346                                         "history") .
4347                                 " | " .
4348                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4349                                         "raw") .
4350                                 " | " .
4351                                 $cgi->a({-href => href(action=>"blob",
4352                                                        hash_base=>"HEAD", file_name=>$file_name)},
4353                                         "HEAD");
4354                 } else {
4355                         $formats_nav .=
4356                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4357                                         "raw");
4358                 }
4359                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4360                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4361         } else {
4362                 print "<div class=\"page_nav\">\n" .
4363                       "<br/><br/></div>\n" .
4364                       "<div class=\"title\">$hash</div>\n";
4365         }
4366         git_print_page_path($file_name, "blob", $hash_base);
4367         print "<div class=\"page_body\">\n";
4368         if ($mimetype =~ m!^image/!) {
4369                 print qq!<img type="$mimetype"!;
4370                 if ($file_name) {
4371                         print qq! alt="$file_name" title="$file_name"!;
4372                 }
4373                 print qq! src="! .
4374                       href(action=>"blob_plain", hash=>$hash,
4375                            hash_base=>$hash_base, file_name=>$file_name) .
4376                       qq!" />\n!;
4377         } else {
4378                 my $nr;
4379                 while (my $line = <$fd>) {
4380                         chomp $line;
4381                         $nr++;
4382                         $line = untabify($line);
4383                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4384                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4385                 }
4386         }
4387         close $fd
4388                 or print "Reading blob failed.\n";
4389         print "</div>";
4390         git_footer_html();
4391 }
4392
4393 sub git_tree {
4394         if (!defined $hash_base) {
4395                 $hash_base = "HEAD";
4396         }
4397         if (!defined $hash) {
4398                 if (defined $file_name) {
4399                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4400                 } else {
4401                         $hash = $hash_base;
4402                 }
4403         }
4404         $/ = "\0";
4405         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4406                 or die_error(undef, "Open git-ls-tree failed");
4407         my @entries = map { chomp; $_ } <$fd>;
4408         close $fd or die_error(undef, "Reading tree failed");
4409         $/ = "\n";
4410
4411         my $refs = git_get_references();
4412         my $ref = format_ref_marker($refs, $hash_base);
4413         git_header_html();
4414         my $basedir = '';
4415         my ($have_blame) = gitweb_check_feature('blame');
4416         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4417                 my @views_nav = ();
4418                 if (defined $file_name) {
4419                         push @views_nav,
4420                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4421                                         "history"),
4422                                 $cgi->a({-href => href(action=>"tree",
4423                                                        hash_base=>"HEAD", file_name=>$file_name)},
4424                                         "HEAD"),
4425                 }
4426                 my $snapshot_links = format_snapshot_links($hash);
4427                 if (defined $snapshot_links) {
4428                         # FIXME: Should be available when we have no hash base as well.
4429                         push @views_nav, $snapshot_links;
4430                 }
4431                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4432                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4433         } else {
4434                 undef $hash_base;
4435                 print "<div class=\"page_nav\">\n";
4436                 print "<br/><br/></div>\n";
4437                 print "<div class=\"title\">$hash</div>\n";
4438         }
4439         if (defined $file_name) {
4440                 $basedir = $file_name;
4441                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4442                         $basedir .= '/';
4443                 }
4444         }
4445         git_print_page_path($file_name, 'tree', $hash_base);
4446         print "<div class=\"page_body\">\n";
4447         print "<table class=\"tree\">\n";
4448         my $alternate = 1;
4449         # '..' (top directory) link if possible
4450         if (defined $hash_base &&
4451             defined $file_name && $file_name =~ m![^/]+$!) {
4452                 if ($alternate) {
4453                         print "<tr class=\"dark\">\n";
4454                 } else {
4455                         print "<tr class=\"light\">\n";
4456                 }
4457                 $alternate ^= 1;
4458
4459                 my $up = $file_name;
4460                 $up =~ s!/?[^/]+$!!;
4461                 undef $up unless $up;
4462                 # based on git_print_tree_entry
4463                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4464                 print '<td class="list">';
4465                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4466                                              file_name=>$up)},
4467                               "..");
4468                 print "</td>\n";
4469                 print "<td class=\"link\"></td>\n";
4470
4471                 print "</tr>\n";
4472         }
4473         foreach my $line (@entries) {
4474                 my %t = parse_ls_tree_line($line, -z => 1);
4475
4476                 if ($alternate) {
4477                         print "<tr class=\"dark\">\n";
4478                 } else {
4479                         print "<tr class=\"light\">\n";
4480                 }
4481                 $alternate ^= 1;
4482
4483                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4484
4485                 print "</tr>\n";
4486         }
4487         print "</table>\n" .
4488               "</div>";
4489         git_footer_html();
4490 }
4491
4492 sub git_snapshot {
4493         my @supported_fmts = gitweb_check_feature('snapshot');
4494         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4495
4496         my $format = $cgi->param('sf');
4497         if (!@supported_fmts) {
4498                 die_error('403 Permission denied', "Permission denied");
4499         }
4500         # default to first supported snapshot format
4501         $format ||= $supported_fmts[0];
4502         if ($format !~ m/^[a-z0-9]+$/) {
4503                 die_error(undef, "Invalid snapshot format parameter");
4504         } elsif (!exists($known_snapshot_formats{$format})) {
4505                 die_error(undef, "Unknown snapshot format");
4506         } elsif (!grep($_ eq $format, @supported_fmts)) {
4507                 die_error(undef, "Unsupported snapshot format");
4508         }
4509
4510         if (!defined $hash) {
4511                 $hash = git_get_head_hash($project);
4512         }
4513
4514         my $name = $project;
4515         $name =~ s,([^/])/*\.git$,$1,;
4516         $name = basename($name);
4517         my $filename = to_utf8($name);
4518         $name =~ s/\047/\047\\\047\047/g;
4519         my $cmd;
4520         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4521         $cmd = quote_command(
4522                 git_cmd(), 'archive',
4523                 "--format=$known_snapshot_formats{$format}{'format'}",
4524                 "--prefix=$name/", $hash);
4525         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4526                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4527         }
4528
4529         print $cgi->header(
4530                 -type => $known_snapshot_formats{$format}{'type'},
4531                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4532                 -status => '200 OK');
4533
4534         open my $fd, "-|", $cmd
4535                 or die_error(undef, "Execute git-archive failed");
4536         binmode STDOUT, ':raw';
4537         print <$fd>;
4538         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4539         close $fd;
4540 }
4541
4542 sub git_log {
4543         my $head = git_get_head_hash($project);
4544         if (!defined $hash) {
4545                 $hash = $head;
4546         }
4547         if (!defined $page) {
4548                 $page = 0;
4549         }
4550         my $refs = git_get_references();
4551
4552         my @commitlist = parse_commits($hash, 101, (100 * $page));
4553
4554         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4555
4556         git_header_html();
4557         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4558
4559         if (!@commitlist) {
4560                 my %co = parse_commit($hash);
4561
4562                 git_print_header_div('summary', $project);
4563                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4564         }
4565         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4566         for (my $i = 0; $i <= $to; $i++) {
4567                 my %co = %{$commitlist[$i]};
4568                 next if !%co;
4569                 my $commit = $co{'id'};
4570                 my $ref = format_ref_marker($refs, $commit);
4571                 my %ad = parse_date($co{'author_epoch'});
4572                 git_print_header_div('commit',
4573                                "<span class=\"age\">$co{'age_string'}</span>" .
4574                                esc_html($co{'title'}) . $ref,
4575                                $commit);
4576                 print "<div class=\"title_text\">\n" .
4577                       "<div class=\"log_link\">\n" .
4578                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4579                       " | " .
4580                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4581                       " | " .
4582                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4583                       "<br/>\n" .
4584                       "</div>\n" .
4585                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4586                       "</div>\n";
4587
4588                 print "<div class=\"log_body\">\n";
4589                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4590                 print "</div>\n";
4591         }
4592         if ($#commitlist >= 100) {
4593                 print "<div class=\"page_nav\">\n";
4594                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4595                                -accesskey => "n", -title => "Alt-n"}, "next");
4596                 print "</div>\n";
4597         }
4598         git_footer_html();
4599 }
4600
4601 sub git_commit {
4602         $hash ||= $hash_base || "HEAD";
4603         my %co = parse_commit($hash);
4604         if (!%co) {
4605                 die_error(undef, "Unknown commit object");
4606         }
4607         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4608         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4609
4610         my $parent  = $co{'parent'};
4611         my $parents = $co{'parents'}; # listref
4612
4613         # we need to prepare $formats_nav before any parameter munging
4614         my $formats_nav;
4615         if (!defined $parent) {
4616                 # --root commitdiff
4617                 $formats_nav .= '(initial)';
4618         } elsif (@$parents == 1) {
4619                 # single parent commit
4620                 $formats_nav .=
4621                         '(parent: ' .
4622                         $cgi->a({-href => href(action=>"commit",
4623                                                hash=>$parent)},
4624                                 esc_html(substr($parent, 0, 7))) .
4625                         ')';
4626         } else {
4627                 # merge commit
4628                 $formats_nav .=
4629                         '(merge: ' .
4630                         join(' ', map {
4631                                 $cgi->a({-href => href(action=>"commit",
4632                                                        hash=>$_)},
4633                                         esc_html(substr($_, 0, 7)));
4634                         } @$parents ) .
4635                         ')';
4636         }
4637
4638         if (!defined $parent) {
4639                 $parent = "--root";
4640         }
4641         my @difftree;
4642         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4643                 @diff_opts,
4644                 (@$parents <= 1 ? $parent : '-c'),
4645                 $hash, "--"
4646                 or die_error(undef, "Open git-diff-tree failed");
4647         @difftree = map { chomp; $_ } <$fd>;
4648         close $fd or die_error(undef, "Reading git-diff-tree failed");
4649
4650         # non-textual hash id's can be cached
4651         my $expires;
4652         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4653                 $expires = "+1d";
4654         }
4655         my $refs = git_get_references();
4656         my $ref = format_ref_marker($refs, $co{'id'});
4657
4658         git_header_html(undef, $expires);
4659         git_print_page_nav('commit', '',
4660                            $hash, $co{'tree'}, $hash,
4661                            $formats_nav);
4662
4663         if (defined $co{'parent'}) {
4664                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4665         } else {
4666                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4667         }
4668         print "<div class=\"title_text\">\n" .
4669               "<table class=\"object_header\">\n";
4670         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4671               "<tr>" .
4672               "<td></td><td> $ad{'rfc2822'}";
4673         if ($ad{'hour_local'} < 6) {
4674                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4675                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4676         } else {
4677                 printf(" (%02d:%02d %s)",
4678                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4679         }
4680         print "</td>" .
4681               "</tr>\n";
4682         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4683         print "<tr><td></td><td> $cd{'rfc2822'}" .
4684               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4685               "</td></tr>\n";
4686         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4687         print "<tr>" .
4688               "<td>tree</td>" .
4689               "<td class=\"sha1\">" .
4690               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4691                        class => "list"}, $co{'tree'}) .
4692               "</td>" .
4693               "<td class=\"link\">" .
4694               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4695                       "tree");
4696         my $snapshot_links = format_snapshot_links($hash);
4697         if (defined $snapshot_links) {
4698                 print " | " . $snapshot_links;
4699         }
4700         print "</td>" .
4701               "</tr>\n";
4702
4703         foreach my $par (@$parents) {
4704                 print "<tr>" .
4705                       "<td>parent</td>" .
4706                       "<td class=\"sha1\">" .
4707                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4708                                class => "list"}, $par) .
4709                       "</td>" .
4710                       "<td class=\"link\">" .
4711                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4712                       " | " .
4713                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4714                       "</td>" .
4715                       "</tr>\n";
4716         }
4717         print "</table>".
4718               "</div>\n";
4719
4720         print "<div class=\"page_body\">\n";
4721         git_print_log($co{'comment'});
4722         print "</div>\n";
4723
4724         git_difftree_body(\@difftree, $hash, @$parents);
4725
4726         git_footer_html();
4727 }
4728
4729 sub git_object {
4730         # object is defined by:
4731         # - hash or hash_base alone
4732         # - hash_base and file_name
4733         my $type;
4734
4735         # - hash or hash_base alone
4736         if ($hash || ($hash_base && !defined $file_name)) {
4737                 my $object_id = $hash || $hash_base;
4738
4739                 open my $fd, "-|", quote_command(
4740                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4741                         or die_error('404 Not Found', "Object does not exist");
4742                 $type = <$fd>;
4743                 chomp $type;
4744                 close $fd
4745                         or die_error('404 Not Found', "Object does not exist");
4746
4747         # - hash_base and file_name
4748         } elsif ($hash_base && defined $file_name) {
4749                 $file_name =~ s,/+$,,;
4750
4751                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4752                         or die_error('404 Not Found', "Base object does not exist");
4753
4754                 # here errors should not hapen
4755                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4756                         or die_error(undef, "Open git-ls-tree failed");
4757                 my $line = <$fd>;
4758                 close $fd;
4759
4760                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4761                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4762                         die_error('404 Not Found', "File or directory for given base does not exist");
4763                 }
4764                 $type = $2;
4765                 $hash = $3;
4766         } else {
4767                 die_error('404 Not Found', "Not enough information to find object");
4768         }
4769
4770         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4771                                           hash=>$hash, hash_base=>$hash_base,
4772                                           file_name=>$file_name),
4773                              -status => '302 Found');
4774 }
4775
4776 sub git_blobdiff {
4777         my $format = shift || 'html';
4778
4779         my $fd;
4780         my @difftree;
4781         my %diffinfo;
4782         my $expires;
4783
4784         # preparing $fd and %diffinfo for git_patchset_body
4785         # new style URI
4786         if (defined $hash_base && defined $hash_parent_base) {
4787                 if (defined $file_name) {
4788                         # read raw output
4789                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4790                                 $hash_parent_base, $hash_base,
4791                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4792                                 or die_error(undef, "Open git-diff-tree failed");
4793                         @difftree = map { chomp; $_ } <$fd>;
4794                         close $fd
4795                                 or die_error(undef, "Reading git-diff-tree failed");
4796                         @difftree
4797                                 or die_error('404 Not Found', "Blob diff not found");
4798
4799                 } elsif (defined $hash &&
4800                          $hash =~ /[0-9a-fA-F]{40}/) {
4801                         # try to find filename from $hash
4802
4803                         # read filtered raw output
4804                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4805                                 $hash_parent_base, $hash_base, "--"
4806                                 or die_error(undef, "Open git-diff-tree failed");
4807                         @difftree =
4808                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4809                                 # $hash == to_id
4810                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4811                                 map { chomp; $_ } <$fd>;
4812                         close $fd
4813                                 or die_error(undef, "Reading git-diff-tree failed");
4814                         @difftree
4815                                 or die_error('404 Not Found', "Blob diff not found");
4816
4817                 } else {
4818                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4819                 }
4820
4821                 if (@difftree > 1) {
4822                         die_error('404 Not Found', "Ambiguous blob diff specification");
4823                 }
4824
4825                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4826                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4827                 $file_name   ||= $diffinfo{'to_file'};
4828
4829                 $hash_parent ||= $diffinfo{'from_id'};
4830                 $hash        ||= $diffinfo{'to_id'};
4831
4832                 # non-textual hash id's can be cached
4833                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4834                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4835                         $expires = '+1d';
4836                 }
4837
4838                 # open patch output
4839                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4840                         '-p', ($format eq 'html' ? "--full-index" : ()),
4841                         $hash_parent_base, $hash_base,
4842                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4843                         or die_error(undef, "Open git-diff-tree failed");
4844         }
4845
4846         # old/legacy style URI
4847         if (!%diffinfo && # if new style URI failed
4848             defined $hash && defined $hash_parent) {
4849                 # fake git-diff-tree raw output
4850                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4851                 $diffinfo{'from_id'} = $hash_parent;
4852                 $diffinfo{'to_id'}   = $hash;
4853                 if (defined $file_name) {
4854                         if (defined $file_parent) {
4855                                 $diffinfo{'status'} = '2';
4856                                 $diffinfo{'from_file'} = $file_parent;
4857                                 $diffinfo{'to_file'}   = $file_name;
4858                         } else { # assume not renamed
4859                                 $diffinfo{'status'} = '1';
4860                                 $diffinfo{'from_file'} = $file_name;
4861                                 $diffinfo{'to_file'}   = $file_name;
4862                         }
4863                 } else { # no filename given
4864                         $diffinfo{'status'} = '2';
4865                         $diffinfo{'from_file'} = $hash_parent;
4866                         $diffinfo{'to_file'}   = $hash;
4867                 }
4868
4869                 # non-textual hash id's can be cached
4870                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4871                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4872                         $expires = '+1d';
4873                 }
4874
4875                 # open patch output
4876                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4877                         '-p', ($format eq 'html' ? "--full-index" : ()),
4878                         $hash_parent, $hash, "--"
4879                         or die_error(undef, "Open git-diff failed");
4880         } else  {
4881                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4882                         unless %diffinfo;
4883         }
4884
4885         # header
4886         if ($format eq 'html') {
4887                 my $formats_nav =
4888                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4889                                 "raw");
4890                 git_header_html(undef, $expires);
4891                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4892                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4893                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4894                 } else {
4895                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4896                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4897                 }
4898                 if (defined $file_name) {
4899                         git_print_page_path($file_name, "blob", $hash_base);
4900                 } else {
4901                         print "<div class=\"page_path\"></div>\n";
4902                 }
4903
4904         } elsif ($format eq 'plain') {
4905                 print $cgi->header(
4906                         -type => 'text/plain',
4907                         -charset => 'utf-8',
4908                         -expires => $expires,
4909                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4910
4911                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4912
4913         } else {
4914                 die_error(undef, "Unknown blobdiff format");
4915         }
4916
4917         # patch
4918         if ($format eq 'html') {
4919                 print "<div class=\"page_body\">\n";
4920
4921                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4922                 close $fd;
4923
4924                 print "</div>\n"; # class="page_body"
4925                 git_footer_html();
4926
4927         } else {
4928                 while (my $line = <$fd>) {
4929                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4930                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4931
4932                         print $line;
4933
4934                         last if $line =~ m!^\+\+\+!;
4935                 }
4936                 local $/ = undef;
4937                 print <$fd>;
4938                 close $fd;
4939         }
4940 }
4941
4942 sub git_blobdiff_plain {
4943         git_blobdiff('plain');
4944 }
4945
4946 sub git_commitdiff {
4947         my $format = shift || 'html';
4948         $hash ||= $hash_base || "HEAD";
4949         my %co = parse_commit($hash);
4950         if (!%co) {
4951                 die_error(undef, "Unknown commit object");
4952         }
4953
4954         # choose format for commitdiff for merge
4955         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4956                 $hash_parent = '--cc';
4957         }
4958         # we need to prepare $formats_nav before almost any parameter munging
4959         my $formats_nav;
4960         if ($format eq 'html') {
4961                 $formats_nav =
4962                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4963                                 "raw");
4964
4965                 if (defined $hash_parent &&
4966                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4967                         # commitdiff with two commits given
4968                         my $hash_parent_short = $hash_parent;
4969                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4970                                 $hash_parent_short = substr($hash_parent, 0, 7);
4971                         }
4972                         $formats_nav .=
4973                                 ' (from';
4974                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4975                                 if ($co{'parents'}[$i] eq $hash_parent) {
4976                                         $formats_nav .= ' parent ' . ($i+1);
4977                                         last;
4978                                 }
4979                         }
4980                         $formats_nav .= ': ' .
4981                                 $cgi->a({-href => href(action=>"commitdiff",
4982                                                        hash=>$hash_parent)},
4983                                         esc_html($hash_parent_short)) .
4984                                 ')';
4985                 } elsif (!$co{'parent'}) {
4986                         # --root commitdiff
4987                         $formats_nav .= ' (initial)';
4988                 } elsif (scalar @{$co{'parents'}} == 1) {
4989                         # single parent commit
4990                         $formats_nav .=
4991                                 ' (parent: ' .
4992                                 $cgi->a({-href => href(action=>"commitdiff",
4993                                                        hash=>$co{'parent'})},
4994                                         esc_html(substr($co{'parent'}, 0, 7))) .
4995                                 ')';
4996                 } else {
4997                         # merge commit
4998                         if ($hash_parent eq '--cc') {
4999                                 $formats_nav .= ' | ' .
5000                                         $cgi->a({-href => href(action=>"commitdiff",
5001                                                                hash=>$hash, hash_parent=>'-c')},
5002                                                 'combined');
5003                         } else { # $hash_parent eq '-c'
5004                                 $formats_nav .= ' | ' .
5005                                         $cgi->a({-href => href(action=>"commitdiff",
5006                                                                hash=>$hash, hash_parent=>'--cc')},
5007                                                 'compact');
5008                         }
5009                         $formats_nav .=
5010                                 ' (merge: ' .
5011                                 join(' ', map {
5012                                         $cgi->a({-href => href(action=>"commitdiff",
5013                                                                hash=>$_)},
5014                                                 esc_html(substr($_, 0, 7)));
5015                                 } @{$co{'parents'}} ) .
5016                                 ')';
5017                 }
5018         }
5019
5020         my $hash_parent_param = $hash_parent;
5021         if (!defined $hash_parent_param) {
5022                 # --cc for multiple parents, --root for parentless
5023                 $hash_parent_param =
5024                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5025         }
5026
5027         # read commitdiff
5028         my $fd;
5029         my @difftree;
5030         if ($format eq 'html') {
5031                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5032                         "--no-commit-id", "--patch-with-raw", "--full-index",
5033                         $hash_parent_param, $hash, "--"
5034                         or die_error(undef, "Open git-diff-tree failed");
5035
5036                 while (my $line = <$fd>) {
5037                         chomp $line;
5038                         # empty line ends raw part of diff-tree output
5039                         last unless $line;
5040                         push @difftree, scalar parse_difftree_raw_line($line);
5041                 }
5042
5043         } elsif ($format eq 'plain') {
5044                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5045                         '-p', $hash_parent_param, $hash, "--"
5046                         or die_error(undef, "Open git-diff-tree failed");
5047
5048         } else {
5049                 die_error(undef, "Unknown commitdiff format");
5050         }
5051
5052         # non-textual hash id's can be cached
5053         my $expires;
5054         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5055                 $expires = "+1d";
5056         }
5057
5058         # write commit message
5059         if ($format eq 'html') {
5060                 my $refs = git_get_references();
5061                 my $ref = format_ref_marker($refs, $co{'id'});
5062
5063                 git_header_html(undef, $expires);
5064                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5065                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5066                 git_print_authorship(\%co);
5067                 print "<div class=\"page_body\">\n";
5068                 if (@{$co{'comment'}} > 1) {
5069                         print "<div class=\"log\">\n";
5070                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5071                         print "</div>\n"; # class="log"
5072                 }
5073
5074         } elsif ($format eq 'plain') {
5075                 my $refs = git_get_references("tags");
5076                 my $tagname = git_get_rev_name_tags($hash);
5077                 my $filename = basename($project) . "-$hash.patch";
5078
5079                 print $cgi->header(
5080                         -type => 'text/plain',
5081                         -charset => 'utf-8',
5082                         -expires => $expires,
5083                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5084                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5085                 print "From: " . to_utf8($co{'author'}) . "\n";
5086                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5087                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5088
5089                 print "X-Git-Tag: $tagname\n" if $tagname;
5090                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5091
5092                 foreach my $line (@{$co{'comment'}}) {
5093                         print to_utf8($line) . "\n";
5094                 }
5095                 print "---\n\n";
5096         }
5097
5098         # write patch
5099         if ($format eq 'html') {
5100                 my $use_parents = !defined $hash_parent ||
5101                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5102                 git_difftree_body(\@difftree, $hash,
5103                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5104                 print "<br/>\n";
5105
5106                 git_patchset_body($fd, \@difftree, $hash,
5107                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5108                 close $fd;
5109                 print "</div>\n"; # class="page_body"
5110                 git_footer_html();
5111
5112         } elsif ($format eq 'plain') {
5113                 local $/ = undef;
5114                 print <$fd>;
5115                 close $fd
5116                         or print "Reading git-diff-tree failed\n";
5117         }
5118 }
5119
5120 sub git_commitdiff_plain {
5121         git_commitdiff('plain');
5122 }
5123
5124 sub git_history {
5125         if (!defined $hash_base) {
5126                 $hash_base = git_get_head_hash($project);
5127         }
5128         if (!defined $page) {
5129                 $page = 0;
5130         }
5131         my $ftype;
5132         my %co = parse_commit($hash_base);
5133         if (!%co) {
5134                 die_error(undef, "Unknown commit object");
5135         }
5136
5137         my $refs = git_get_references();
5138         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5139
5140         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5141                                        $file_name, "--full-history");
5142         if (!@commitlist) {
5143                 die_error('404 Not Found', "No such file or directory on given branch");
5144         }
5145
5146         if (!defined $hash && defined $file_name) {
5147                 # some commits could have deleted file in question,
5148                 # and not have it in tree, but one of them has to have it
5149                 for (my $i = 0; $i <= @commitlist; $i++) {
5150                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5151                         last if defined $hash;
5152                 }
5153         }
5154         if (defined $hash) {
5155                 $ftype = git_get_type($hash);
5156         }
5157         if (!defined $ftype) {
5158                 die_error(undef, "Unknown type of object");
5159         }
5160
5161         my $paging_nav = '';
5162         if ($page > 0) {
5163                 $paging_nav .=
5164                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5165                                                file_name=>$file_name)},
5166                                 "first");
5167                 $paging_nav .= " &sdot; " .
5168                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5169                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5170         } else {
5171                 $paging_nav .= "first";
5172                 $paging_nav .= " &sdot; prev";
5173         }
5174         my $next_link = '';
5175         if ($#commitlist >= 100) {
5176                 $next_link =
5177                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5178                                  -accesskey => "n", -title => "Alt-n"}, "next");
5179                 $paging_nav .= " &sdot; $next_link";
5180         } else {
5181                 $paging_nav .= " &sdot; next";
5182         }
5183
5184         git_header_html();
5185         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5186         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5187         git_print_page_path($file_name, $ftype, $hash_base);
5188
5189         git_history_body(\@commitlist, 0, 99,
5190                          $refs, $hash_base, $ftype, $next_link);
5191
5192         git_footer_html();
5193 }
5194
5195 sub git_search {
5196         my ($have_search) = gitweb_check_feature('search');
5197         if (!$have_search) {
5198                 die_error('403 Permission denied', "Permission denied");
5199         }
5200         if (!defined $searchtext) {
5201                 die_error(undef, "Text field empty");
5202         }
5203         if (!defined $hash) {
5204                 $hash = git_get_head_hash($project);
5205         }
5206         my %co = parse_commit($hash);
5207         if (!%co) {
5208                 die_error(undef, "Unknown commit object");
5209         }
5210         if (!defined $page) {
5211                 $page = 0;
5212         }
5213
5214         $searchtype ||= 'commit';
5215         if ($searchtype eq 'pickaxe') {
5216                 # pickaxe may take all resources of your box and run for several minutes
5217                 # with every query - so decide by yourself how public you make this feature
5218                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5219                 if (!$have_pickaxe) {
5220                         die_error('403 Permission denied', "Permission denied");
5221                 }
5222         }
5223         if ($searchtype eq 'grep') {
5224                 my ($have_grep) = gitweb_check_feature('grep');
5225                 if (!$have_grep) {
5226                         die_error('403 Permission denied', "Permission denied");
5227                 }
5228         }
5229
5230         git_header_html();
5231
5232         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5233                 my $greptype;
5234                 if ($searchtype eq 'commit') {
5235                         $greptype = "--grep=";
5236                 } elsif ($searchtype eq 'author') {
5237                         $greptype = "--author=";
5238                 } elsif ($searchtype eq 'committer') {
5239                         $greptype = "--committer=";
5240                 }
5241                 $greptype .= $searchtext;
5242                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5243                                                $greptype, '--regexp-ignore-case',
5244                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5245
5246                 my $paging_nav = '';
5247                 if ($page > 0) {
5248                         $paging_nav .=
5249                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5250                                                        searchtext=>$searchtext,
5251                                                        searchtype=>$searchtype)},
5252                                         "first");
5253                         $paging_nav .= " &sdot; " .
5254                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5255                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5256                 } else {
5257                         $paging_nav .= "first";
5258                         $paging_nav .= " &sdot; prev";
5259                 }
5260                 my $next_link = '';
5261                 if ($#commitlist >= 100) {
5262                         $next_link =
5263                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5264                                          -accesskey => "n", -title => "Alt-n"}, "next");
5265                         $paging_nav .= " &sdot; $next_link";
5266                 } else {
5267                         $paging_nav .= " &sdot; next";
5268                 }
5269
5270                 if ($#commitlist >= 100) {
5271                 }
5272
5273                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5274                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5275                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5276         }
5277
5278         if ($searchtype eq 'pickaxe') {
5279                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5280                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5281
5282                 print "<table class=\"pickaxe search\">\n";
5283                 my $alternate = 1;
5284                 $/ = "\n";
5285                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5286                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5287                         ($search_use_regexp ? '--pickaxe-regex' : ());
5288                 undef %co;
5289                 my @files;
5290                 while (my $line = <$fd>) {
5291                         chomp $line;
5292                         next unless $line;
5293
5294                         my %set = parse_difftree_raw_line($line);
5295                         if (defined $set{'commit'}) {
5296                                 # finish previous commit
5297                                 if (%co) {
5298                                         print "</td>\n" .
5299                                               "<td class=\"link\">" .
5300                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5301                                               " | " .
5302                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5303                                         print "</td>\n" .
5304                                               "</tr>\n";
5305                                 }
5306
5307                                 if ($alternate) {
5308                                         print "<tr class=\"dark\">\n";
5309                                 } else {
5310                                         print "<tr class=\"light\">\n";
5311                                 }
5312                                 $alternate ^= 1;
5313                                 %co = parse_commit($set{'commit'});
5314                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5315                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5316                                       "<td><i>$author</i></td>\n" .
5317                                       "<td>" .
5318                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5319                                               -class => "list subject"},
5320                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5321                         } elsif (defined $set{'to_id'}) {
5322                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5323
5324                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5325                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5326                                               -class => "list"},
5327                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5328                                       "<br/>\n";
5329                         }
5330                 }
5331                 close $fd;
5332
5333                 # finish last commit (warning: repetition!)
5334                 if (%co) {
5335                         print "</td>\n" .
5336                               "<td class=\"link\">" .
5337                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5338                               " | " .
5339                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5340                         print "</td>\n" .
5341                               "</tr>\n";
5342                 }
5343
5344                 print "</table>\n";
5345         }
5346
5347         if ($searchtype eq 'grep') {
5348                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5349                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5350
5351                 print "<table class=\"grep_search\">\n";
5352                 my $alternate = 1;
5353                 my $matches = 0;
5354                 $/ = "\n";
5355                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5356                         $search_use_regexp ? ('-E', '-i') : '-F',
5357                         $searchtext, $co{'tree'};
5358                 my $lastfile = '';
5359                 while (my $line = <$fd>) {
5360                         chomp $line;
5361                         my ($file, $lno, $ltext, $binary);
5362                         last if ($matches++ > 1000);
5363                         if ($line =~ /^Binary file (.+) matches$/) {
5364                                 $file = $1;
5365                                 $binary = 1;
5366                         } else {
5367                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5368                         }
5369                         if ($file ne $lastfile) {
5370                                 $lastfile and print "</td></tr>\n";
5371                                 if ($alternate++) {
5372                                         print "<tr class=\"dark\">\n";
5373                                 } else {
5374                                         print "<tr class=\"light\">\n";
5375                                 }
5376                                 print "<td class=\"list\">".
5377                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5378                                                                file_name=>"$file"),
5379                                                 -class => "list"}, esc_path($file));
5380                                 print "</td><td>\n";
5381                                 $lastfile = $file;
5382                         }
5383                         if ($binary) {
5384                                 print "<div class=\"binary\">Binary file</div>\n";
5385                         } else {
5386                                 $ltext = untabify($ltext);
5387                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5388                                         $ltext = esc_html($1, -nbsp=>1);
5389                                         $ltext .= '<span class="match">';
5390                                         $ltext .= esc_html($2, -nbsp=>1);
5391                                         $ltext .= '</span>';
5392                                         $ltext .= esc_html($3, -nbsp=>1);
5393                                 } else {
5394                                         $ltext = esc_html($ltext, -nbsp=>1);
5395                                 }
5396                                 print "<div class=\"pre\">" .
5397                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5398                                                                file_name=>"$file").'#l'.$lno,
5399                                                 -class => "linenr"}, sprintf('%4i', $lno))
5400                                         . ' ' .  $ltext . "</div>\n";
5401                         }
5402                 }
5403                 if ($lastfile) {
5404                         print "</td></tr>\n";
5405                         if ($matches > 1000) {
5406                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5407                         }
5408                 } else {
5409                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5410                 }
5411                 close $fd;
5412
5413                 print "</table>\n";
5414         }
5415         git_footer_html();
5416 }
5417
5418 sub git_search_help {
5419         git_header_html();
5420         git_print_page_nav('','', $hash,$hash,$hash);
5421         print <<EOT;
5422 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5423 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5424 the pattern entered is recognized as the POSIX extended
5425 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5426 insensitive).</p>
5427 <dl>
5428 <dt><b>commit</b></dt>
5429 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5430 EOT
5431         my ($have_grep) = gitweb_check_feature('grep');
5432         if ($have_grep) {
5433                 print <<EOT;
5434 <dt><b>grep</b></dt>
5435 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5436     a different one) are searched for the given pattern. On large trees, this search can take
5437 a while and put some strain on the server, so please use it with some consideration. Note that
5438 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5439 case-sensitive.</dd>
5440 EOT
5441         }
5442         print <<EOT;
5443 <dt><b>author</b></dt>
5444 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5445 <dt><b>committer</b></dt>
5446 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5447 EOT
5448         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5449         if ($have_pickaxe) {
5450                 print <<EOT;
5451 <dt><b>pickaxe</b></dt>
5452 <dd>All commits that caused the string to appear or disappear from any file (changes that
5453 added, removed or "modified" the string) will be listed. This search can take a while and
5454 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5455 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5456 EOT
5457         }
5458         print "</dl>\n";
5459         git_footer_html();
5460 }
5461
5462 sub git_shortlog {
5463         my $head = git_get_head_hash($project);
5464         if (!defined $hash) {
5465                 $hash = $head;
5466         }
5467         if (!defined $page) {
5468                 $page = 0;
5469         }
5470         my $refs = git_get_references();
5471
5472         my @commitlist = parse_commits($hash, 101, (100 * $page));
5473
5474         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5475         my $next_link = '';
5476         if ($#commitlist >= 100) {
5477                 $next_link =
5478                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5479                                  -accesskey => "n", -title => "Alt-n"}, "next");
5480         }
5481
5482         git_header_html();
5483         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5484         git_print_header_div('summary', $project);
5485
5486         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5487
5488         git_footer_html();
5489 }
5490
5491 ## ......................................................................
5492 ## feeds (RSS, Atom; OPML)
5493
5494 sub git_feed {
5495         my $format = shift || 'atom';
5496         my ($have_blame) = gitweb_check_feature('blame');
5497
5498         # Atom: http://www.atomenabled.org/developers/syndication/
5499         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5500         if ($format ne 'rss' && $format ne 'atom') {
5501                 die_error(undef, "Unknown web feed format");
5502         }
5503
5504         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5505         my $head = $hash || 'HEAD';
5506         my @commitlist = parse_commits($head, 150, 0, $file_name);
5507
5508         my %latest_commit;
5509         my %latest_date;
5510         my $content_type = "application/$format+xml";
5511         if (defined $cgi->http('HTTP_ACCEPT') &&
5512                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5513                 # browser (feed reader) prefers text/xml
5514                 $content_type = 'text/xml';
5515         }
5516         if (defined($commitlist[0])) {
5517                 %latest_commit = %{$commitlist[0]};
5518                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5519                 print $cgi->header(
5520                         -type => $content_type,
5521                         -charset => 'utf-8',
5522                         -last_modified => $latest_date{'rfc2822'});
5523         } else {
5524                 print $cgi->header(
5525                         -type => $content_type,
5526                         -charset => 'utf-8');
5527         }
5528
5529         # Optimization: skip generating the body if client asks only
5530         # for Last-Modified date.
5531         return if ($cgi->request_method() eq 'HEAD');
5532
5533         # header variables
5534         my $title = "$site_name - $project/$action";
5535         my $feed_type = 'log';
5536         if (defined $hash) {
5537                 $title .= " - '$hash'";
5538                 $feed_type = 'branch log';
5539                 if (defined $file_name) {
5540                         $title .= " :: $file_name";
5541                         $feed_type = 'history';
5542                 }
5543         } elsif (defined $file_name) {
5544                 $title .= " - $file_name";
5545                 $feed_type = 'history';
5546         }
5547         $title .= " $feed_type";
5548         my $descr = git_get_project_description($project);
5549         if (defined $descr) {
5550                 $descr = esc_html($descr);
5551         } else {
5552                 $descr = "$project " .
5553                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5554                          " feed";
5555         }
5556         my $owner = git_get_project_owner($project);
5557         $owner = esc_html($owner);
5558
5559         #header
5560         my $alt_url;
5561         if (defined $file_name) {
5562                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5563         } elsif (defined $hash) {
5564                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5565         } else {
5566                 $alt_url = href(-full=>1, action=>"summary");
5567         }
5568         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5569         if ($format eq 'rss') {
5570                 print <<XML;
5571 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5572 <channel>
5573 XML
5574                 print "<title>$title</title>\n" .
5575                       "<link>$alt_url</link>\n" .
5576                       "<description>$descr</description>\n" .
5577                       "<language>en</language>\n";
5578         } elsif ($format eq 'atom') {
5579                 print <<XML;
5580 <feed xmlns="http://www.w3.org/2005/Atom">
5581 XML
5582                 print "<title>$title</title>\n" .
5583                       "<subtitle>$descr</subtitle>\n" .
5584                       '<link rel="alternate" type="text/html" href="' .
5585                       $alt_url . '" />' . "\n" .
5586                       '<link rel="self" type="' . $content_type . '" href="' .
5587                       $cgi->self_url() . '" />' . "\n" .
5588                       "<id>" . href(-full=>1) . "</id>\n" .
5589                       # use project owner for feed author
5590                       "<author><name>$owner</name></author>\n";
5591                 if (defined $favicon) {
5592                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5593                 }
5594                 if (defined $logo_url) {
5595                         # not twice as wide as tall: 72 x 27 pixels
5596                         print "<logo>" . esc_url($logo) . "</logo>\n";
5597                 }
5598                 if (! %latest_date) {
5599                         # dummy date to keep the feed valid until commits trickle in:
5600                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5601                 } else {
5602                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5603                 }
5604         }
5605
5606         # contents
5607         for (my $i = 0; $i <= $#commitlist; $i++) {
5608                 my %co = %{$commitlist[$i]};
5609                 my $commit = $co{'id'};
5610                 # we read 150, we always show 30 and the ones more recent than 48 hours
5611                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5612                         last;
5613                 }
5614                 my %cd = parse_date($co{'author_epoch'});
5615
5616                 # get list of changed files
5617                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5618                         $co{'parent'} || "--root",
5619                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5620                         or next;
5621                 my @difftree = map { chomp; $_ } <$fd>;
5622                 close $fd
5623                         or next;
5624
5625                 # print element (entry, item)
5626                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5627                 if ($format eq 'rss') {
5628                         print "<item>\n" .
5629                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5630                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5631                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5632                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5633                               "<link>$co_url</link>\n" .
5634                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5635                               "<content:encoded>" .
5636                               "<![CDATA[\n";
5637                 } elsif ($format eq 'atom') {
5638                         print "<entry>\n" .
5639                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5640                               "<updated>$cd{'iso-8601'}</updated>\n" .
5641                               "<author>\n" .
5642                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5643                         if ($co{'author_email'}) {
5644                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5645                         }
5646                         print "</author>\n" .
5647                               # use committer for contributor
5648                               "<contributor>\n" .
5649                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5650                         if ($co{'committer_email'}) {
5651                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5652                         }
5653                         print "</contributor>\n" .
5654                               "<published>$cd{'iso-8601'}</published>\n" .
5655                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5656                               "<id>$co_url</id>\n" .
5657                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5658                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5659                 }
5660                 my $comment = $co{'comment'};
5661                 print "<pre>\n";
5662                 foreach my $line (@$comment) {
5663                         $line = esc_html($line);
5664                         print "$line\n";
5665                 }
5666                 print "</pre><ul>\n";
5667                 foreach my $difftree_line (@difftree) {
5668                         my %difftree = parse_difftree_raw_line($difftree_line);
5669                         next if !$difftree{'from_id'};
5670
5671                         my $file = $difftree{'file'} || $difftree{'to_file'};
5672
5673                         print "<li>" .
5674                               "[" .
5675                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5676                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5677                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5678                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5679                                       -title => "diff"}, 'D');
5680                         if ($have_blame) {
5681                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5682                                                              file_name=>$file, hash_base=>$commit),
5683                                               -title => "blame"}, 'B');
5684                         }
5685                         # if this is not a feed of a file history
5686                         if (!defined $file_name || $file_name ne $file) {
5687                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5688                                                              file_name=>$file, hash=>$commit),
5689                                               -title => "history"}, 'H');
5690                         }
5691                         $file = esc_path($file);
5692                         print "] ".
5693                               "$file</li>\n";
5694                 }
5695                 if ($format eq 'rss') {
5696                         print "</ul>]]>\n" .
5697                               "</content:encoded>\n" .
5698                               "</item>\n";
5699                 } elsif ($format eq 'atom') {
5700                         print "</ul>\n</div>\n" .
5701                               "</content>\n" .
5702                               "</entry>\n";
5703                 }
5704         }
5705
5706         # end of feed
5707         if ($format eq 'rss') {
5708                 print "</channel>\n</rss>\n";
5709         }       elsif ($format eq 'atom') {
5710                 print "</feed>\n";
5711         }
5712 }
5713
5714 sub git_rss {
5715         git_feed('rss');
5716 }
5717
5718 sub git_atom {
5719         git_feed('atom');
5720 }
5721
5722 sub git_opml {
5723         my @list = git_get_projects_list();
5724
5725         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5726         print <<XML;
5727 <?xml version="1.0" encoding="utf-8"?>
5728 <opml version="1.0">
5729 <head>
5730   <title>$site_name OPML Export</title>
5731 </head>
5732 <body>
5733 <outline text="git RSS feeds">
5734 XML
5735
5736         foreach my $pr (@list) {
5737                 my %proj = %$pr;
5738                 my $head = git_get_head_hash($proj{'path'});
5739                 if (!defined $head) {
5740                         next;
5741                 }
5742                 $git_dir = "$projectroot/$proj{'path'}";
5743                 my %co = parse_commit($head);
5744                 if (!%co) {
5745                         next;
5746                 }
5747
5748                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5749                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5750                 my $html = "$my_url?p=$proj{'path'};a=summary";
5751                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5752         }
5753         print <<XML;
5754 </outline>
5755 </body>
5756 </opml>
5757 XML
5758 }