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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # target of the home link on top of all pages
  39 our $home_link = $my_uri || "/";
  40
  41 # string of the home link on top of all pages
  42 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  43
  44 # name of your site or organization to appear in page titles
  45 # replace this with something more descriptive for clearer bookmarks
  46 our $site_name = "++GITWEB_SITENAME++"
  47                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  48
  49 # filename of html text to include at top of each page
  50 our $site_header = "++GITWEB_SITE_HEADER++";
  51 # html text to include at home page
  52 our $home_text = "++GITWEB_HOMETEXT++";
  53 # filename of html text to include at bottom of each page
  54 our $site_footer = "++GITWEB_SITE_FOOTER++";
  55
  56 # URI of stylesheets
  57 our @stylesheets = ("++GITWEB_CSS++");
  58 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  59 our $stylesheet = undef;
  60
  61 # URI of GIT logo (72x27 size)
  62 our $logo = "++GITWEB_LOGO++";
  63 # URI of GIT favicon, assumed to be image/png type
  64 our $favicon = "++GITWEB_FAVICON++";
  65
  66 # URI and label (title) of GIT logo link
  67 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  68 #our $logo_label = "git documentation";
  69 our $logo_url = "http://git.or.cz/";
  70 our $logo_label = "git homepage";
  71
  72 # source of projects list
  73 our $projects_list = "++GITWEB_LIST++";
  74
  75 # the width (in characters) of the projects list "Description" column
  76 our $projects_list_description_width = 25;
  77
  78 # default order of projects list
  79 # valid values are none, project, descr, owner, and age
  80 our $default_projects_order = "project";
  81
  82 # show repository only if this file exists
  83 # (only effective if this variable evaluates to true)
  84 our $export_ok = "++GITWEB_EXPORT_OK++";
  85
  86 # only allow viewing of repositories also shown on the overview page
  87 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  88
  89 # list of git base URLs used for URL to where fetch project from,
  90 # i.e. full URL is "$git_base_url/$project"
  91 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  92
  93 # default blob_plain mimetype and default charset for text/plain blob
  94 our $default_blob_plain_mimetype = 'text/plain';
  95 our $default_text_plain_charset  = undef;
  96
  97 # file to use for guessing MIME types before trying /etc/mime.types
  98 # (relative to the current git repository)
  99 our $mimetypes_file = undef;
 100
 101 # assume this charset if line contains non-UTF-8 characters;
 102 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 103 # for which encoding all byte sequences are valid, for example
 104 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 105 # could be even 'utf-8' for the old behavior)
 106 our $fallback_encoding = 'latin1';
 107
 108 # rename detection options for git-diff and git-diff-tree
 109 # - default is '-M', with the cost proportional to
 110 #   (number of removed files) * (number of new files).
 111 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 112 #   (number of changed files + number of removed files) * (number of new files)
 113 # - even more costly is '-C', '--find-copies-harder' with cost
 114 #   (number of files in the original tree) * (number of new files)
 115 # - one might want to include '-B' option, e.g. '-B', '-M'
 116 our @diff_opts = ('-M'); # taken from git_commit
 117
 118 # information about snapshot formats that gitweb is capable of serving
 119 our %known_snapshot_formats = (
 120         # name => {
 121         #       'display' => display name,
 122         #       'type' => mime type,
 123         #       'suffix' => filename suffix,
 124         #       'format' => --format for git-archive,
 125         #       'compressor' => [compressor command and arguments]
 126         #                       (array reference, optional)}
 127         #
 128         'tgz' => {
 129                 'display' => 'tar.gz',
 130                 'type' => 'application/x-gzip',
 131                 'suffix' => '.tar.gz',
 132                 'format' => 'tar',
 133                 'compressor' => ['gzip']},
 134
 135         'tbz2' => {
 136                 'display' => 'tar.bz2',
 137                 'type' => 'application/x-bzip2',
 138                 'suffix' => '.tar.bz2',
 139                 'format' => 'tar',
 140                 'compressor' => ['bzip2']},
 141
 142         'zip' => {
 143                 'display' => 'zip',
 144                 'type' => 'application/x-zip',
 145                 'suffix' => '.zip',
 146                 'format' => 'zip'},
 147 );
 148
 149 # Aliases so we understand old gitweb.snapshot values in repository
 150 # configuration.
 151 our %known_snapshot_format_aliases = (
 152         'gzip'  => 'tgz',
 153         'bzip2' => 'tbz2',
 154
 155         # backward compatibility: legacy gitweb config support
 156         'x-gzip' => undef, 'gz' => undef,
 157         'x-bzip2' => undef, 'bz2' => undef,
 158         'x-zip' => undef, '' => undef,
 159 );
 160
 161 # You define site-wide feature defaults here; override them with
 162 # $GITWEB_CONFIG as necessary.
 163 our %feature = (
 164         # feature => {
 165         #       'sub' => feature-sub (subroutine),
 166         #       'override' => allow-override (boolean),
 167         #       'default' => [ default options...] (array reference)}
 168         #
 169         # if feature is overridable (it means that allow-override has true value),
 170         # then feature-sub will be called with default options as parameters;
 171         # return value of feature-sub indicates if to enable specified feature
 172         #
 173         # if there is no 'sub' key (no feature-sub), then feature cannot be
 174         # overriden
 175         #
 176         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 177
 178         # Enable the 'blame' blob view, showing the last commit that modified
 179         # each line in the file. This can be very CPU-intensive.
 180
 181         # To enable system wide have in $GITWEB_CONFIG
 182         # $feature{'blame'}{'default'} = [1];
 183         # To have project specific config enable override in $GITWEB_CONFIG
 184         # $feature{'blame'}{'override'} = 1;
 185         # and in project config gitweb.blame = 0|1;
 186         'blame' => {
 187                 'sub' => \&feature_blame,
 188                 'override' => 0,
 189                 'default' => [0]},
 190
 191         # Enable the 'snapshot' link, providing a compressed archive of any
 192         # tree. This can potentially generate high traffic if you have large
 193         # project.
 194
 195         # Value is a list of formats defined in %known_snapshot_formats that
 196         # you wish to offer.
 197         # To disable system wide have in $GITWEB_CONFIG
 198         # $feature{'snapshot'}{'default'} = [];
 199         # To have project specific config enable override in $GITWEB_CONFIG
 200         # $feature{'snapshot'}{'override'} = 1;
 201         # and in project config, a comma-separated list of formats or "none"
 202         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 203         'snapshot' => {
 204                 'sub' => \&feature_snapshot,
 205                 'override' => 0,
 206                 'default' => ['tgz']},
 207
 208         # Enable text search, which will list the commits which match author,
 209         # committer or commit text to a given string.  Enabled by default.
 210         # Project specific override is not supported.
 211         'search' => {
 212                 'override' => 0,
 213                 'default' => [1]},
 214
 215         # Enable grep search, which will list the files in currently selected
 216         # tree containing the given string. Enabled by default. This can be
 217         # potentially CPU-intensive, of course.
 218
 219         # To enable system wide have in $GITWEB_CONFIG
 220         # $feature{'grep'}{'default'} = [1];
 221         # To have project specific config enable override in $GITWEB_CONFIG
 222         # $feature{'grep'}{'override'} = 1;
 223         # and in project config gitweb.grep = 0|1;
 224         'grep' => {
 225                 'override' => 0,
 226                 'default' => [1]},
 227
 228         # Enable the pickaxe search, which will list the commits that modified
 229         # a given string in a file. This can be practical and quite faster
 230         # alternative to 'blame', but still potentially CPU-intensive.
 231
 232         # To enable system wide have in $GITWEB_CONFIG
 233         # $feature{'pickaxe'}{'default'} = [1];
 234         # To have project specific config enable override in $GITWEB_CONFIG
 235         # $feature{'pickaxe'}{'override'} = 1;
 236         # and in project config gitweb.pickaxe = 0|1;
 237         'pickaxe' => {
 238                 'sub' => \&feature_pickaxe,
 239                 'override' => 0,
 240                 'default' => [1]},
 241
 242         # Make gitweb use an alternative format of the URLs which can be
 243         # more readable and natural-looking: project name is embedded
 244         # directly in the path and the query string contains other
 245         # auxiliary information. All gitweb installations recognize
 246         # URL in either format; this configures in which formats gitweb
 247         # generates links.
 248
 249         # To enable system wide have in $GITWEB_CONFIG
 250         # $feature{'pathinfo'}{'default'} = [1];
 251         # Project specific override is not supported.
 252
 253         # Note that you will need to change the default location of CSS,
 254         # favicon, logo and possibly other files to an absolute URL. Also,
 255         # if gitweb.cgi serves as your indexfile, you will need to force
 256         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 257         'pathinfo' => {
 258                 'override' => 0,
 259                 'default' => [0]},
 260
 261         # Make gitweb consider projects in project root subdirectories
 262         # to be forks of existing projects. Given project $projname.git,
 263         # projects matching $projname/*.git will not be shown in the main
 264         # projects list, instead a '+' mark will be added to $projname
 265         # there and a 'forks' view will be enabled for the project, listing
 266         # all the forks. If project list is taken from a file, forks have
 267         # to be listed after the main project.
 268
 269         # To enable system wide have in $GITWEB_CONFIG
 270         # $feature{'forks'}{'default'} = [1];
 271         # Project specific override is not supported.
 272         'forks' => {
 273                 'override' => 0,
 274                 'default' => [0]},
 275 );
 276
 277 sub gitweb_check_feature {
 278         my ($name) = @_;
 279         return unless exists $feature{$name};
 280         my ($sub, $override, @defaults) = (
 281                 $feature{$name}{'sub'},
 282                 $feature{$name}{'override'},
 283                 @{$feature{$name}{'default'}});
 284         if (!$override) { return @defaults; }
 285         if (!defined $sub) {
 286                 warn "feature $name is not overrideable";
 287                 return @defaults;
 288         }
 289         return $sub->(@defaults);
 290 }
 291
 292 sub feature_blame {
 293         my ($val) = git_get_project_config('blame', '--bool');
 294
 295         if ($val eq 'true') {
 296                 return 1;
 297         } elsif ($val eq 'false') {
 298                 return 0;
 299         }
 300
 301         return $_[0];
 302 }
 303
 304 sub feature_snapshot {
 305         my (@fmts) = @_;
 306
 307         my ($val) = git_get_project_config('snapshot');
 308
 309         if ($val) {
 310                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 311         }
 312
 313         return @fmts;
 314 }
 315
 316 sub feature_grep {
 317         my ($val) = git_get_project_config('grep', '--bool');
 318
 319         if ($val eq 'true') {
 320                 return (1);
 321         } elsif ($val eq 'false') {
 322                 return (0);
 323         }
 324
 325         return ($_[0]);
 326 }
 327
 328 sub feature_pickaxe {
 329         my ($val) = git_get_project_config('pickaxe', '--bool');
 330
 331         if ($val eq 'true') {
 332                 return (1);
 333         } elsif ($val eq 'false') {
 334                 return (0);
 335         }
 336
 337         return ($_[0]);
 338 }
 339
 340 # checking HEAD file with -e is fragile if the repository was
 341 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 342 # and then pruned.
 343 sub check_head_link {
 344         my ($dir) = @_;
 345         my $headfile = "$dir/HEAD";
 346         return ((-e $headfile) ||
 347                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 348 }
 349
 350 sub check_export_ok {
 351         my ($dir) = @_;
 352         return (check_head_link($dir) &&
 353                 (!$export_ok || -e "$dir/$export_ok"));
 354 }
 355
 356 # process alternate names for backward compatibility
 357 # filter out unsupported (unknown) snapshot formats
 358 sub filter_snapshot_fmts {
 359         my @fmts = @_;
 360
 361         @fmts = map {
 362                 exists $known_snapshot_format_aliases{$_} ?
 363                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 364         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 365
 366 }
 367
 368 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 369 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 370
 371 # version of the core git binary
 372 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 373
 374 $projects_list ||= $projectroot;
 375
 376 # ======================================================================
 377 # input validation and dispatch
 378 our $action = $cgi->param('a');
 379 if (defined $action) {
 380         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 381                 die_error(undef, "Invalid action parameter");
 382         }
 383 }
 384
 385 # parameters which are pathnames
 386 our $project = $cgi->param('p');
 387 if (defined $project) {
 388         if (!validate_pathname($project) ||
 389             !(-d "$projectroot/$project") ||
 390             !check_head_link("$projectroot/$project") ||
 391             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 392             ($strict_export && !project_in_list($project))) {
 393                 undef $project;
 394                 die_error(undef, "No such project");
 395         }
 396 }
 397
 398 our $file_name = $cgi->param('f');
 399 if (defined $file_name) {
 400         if (!validate_pathname($file_name)) {
 401                 die_error(undef, "Invalid file parameter");
 402         }
 403 }
 404
 405 our $file_parent = $cgi->param('fp');
 406 if (defined $file_parent) {
 407         if (!validate_pathname($file_parent)) {
 408                 die_error(undef, "Invalid file parent parameter");
 409         }
 410 }
 411
 412 # parameters which are refnames
 413 our $hash = $cgi->param('h');
 414 if (defined $hash) {
 415         if (!validate_refname($hash)) {
 416                 die_error(undef, "Invalid hash parameter");
 417         }
 418 }
 419
 420 our $hash_parent = $cgi->param('hp');
 421 if (defined $hash_parent) {
 422         if (!validate_refname($hash_parent)) {
 423                 die_error(undef, "Invalid hash parent parameter");
 424         }
 425 }
 426
 427 our $hash_base = $cgi->param('hb');
 428 if (defined $hash_base) {
 429         if (!validate_refname($hash_base)) {
 430                 die_error(undef, "Invalid hash base parameter");
 431         }
 432 }
 433
 434 my %allowed_options = (
 435         "--no-merges" => [ qw(rss atom log shortlog history) ],
 436 );
 437
 438 our @extra_options = $cgi->param('opt');
 439 if (defined @extra_options) {
 440         foreach my $opt (@extra_options) {
 441                 if (not exists $allowed_options{$opt}) {
 442                         die_error(undef, "Invalid option parameter");
 443                 }
 444                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 445                         die_error(undef, "Invalid option parameter for this action");
 446                 }
 447         }
 448 }
 449
 450 our $hash_parent_base = $cgi->param('hpb');
 451 if (defined $hash_parent_base) {
 452         if (!validate_refname($hash_parent_base)) {
 453                 die_error(undef, "Invalid hash parent base parameter");
 454         }
 455 }
 456
 457 # other parameters
 458 our $page = $cgi->param('pg');
 459 if (defined $page) {
 460         if ($page =~ m/[^0-9]/) {
 461                 die_error(undef, "Invalid page parameter");
 462         }
 463 }
 464
 465 our $searchtype = $cgi->param('st');
 466 if (defined $searchtype) {
 467         if ($searchtype =~ m/[^a-z]/) {
 468                 die_error(undef, "Invalid searchtype parameter");
 469         }
 470 }
 471
 472 our $searchtext = $cgi->param('s');
 473 our $search_regexp;
 474 if (defined $searchtext) {
 475         if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 476                 die_error(undef, "Invalid search parameter");
 477         }
 478         if (length($searchtext) < 2) {
 479                 die_error(undef, "At least two characters are required for search parameter");
 480         }
 481         $search_regexp = quotemeta $searchtext;
 482 }
 483
 484 # now read PATH_INFO and use it as alternative to parameters
 485 sub evaluate_path_info {
 486         return if defined $project;
 487         my $path_info = $ENV{"PATH_INFO"};
 488         return if !$path_info;
 489         $path_info =~ s,^/+,,;
 490         return if !$path_info;
 491         # find which part of PATH_INFO is project
 492         $project = $path_info;
 493         $project =~ s,/+$,,;
 494         while ($project && !check_head_link("$projectroot/$project")) {
 495                 $project =~ s,/*[^/]*$,,;
 496         }
 497         # validate project
 498         $project = validate_pathname($project);
 499         if (!$project ||
 500             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 501             ($strict_export && !project_in_list($project))) {
 502                 undef $project;
 503                 return;
 504         }
 505         # do not change any parameters if an action is given using the query string
 506         return if $action;
 507         $path_info =~ s,^$project/*,,;
 508         my ($refname, $pathname) = split(/:/, $path_info, 2);
 509         if (defined $pathname) {
 510                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 511                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 512                 $pathname =~ s,^/+,,;
 513                 if (!$pathname || substr($pathname, -1) eq "/") {
 514                         $action  ||= "tree";
 515                         $pathname =~ s,/$,,;
 516                 } else {
 517                         $action  ||= "blob_plain";
 518                 }
 519                 $hash_base ||= validate_refname($refname);
 520                 $file_name ||= validate_pathname($pathname);
 521         } elsif (defined $refname) {
 522                 # we got "project.git/branch"
 523                 $action ||= "shortlog";
 524                 $hash   ||= validate_refname($refname);
 525         }
 526 }
 527 evaluate_path_info();
 528
 529 # path to the current git repository
 530 our $git_dir;
 531 $git_dir = "$projectroot/$project" if $project;
 532
 533 # dispatch
 534 my %actions = (
 535         "blame" => \&git_blame2,
 536         "blobdiff" => \&git_blobdiff,
 537         "blobdiff_plain" => \&git_blobdiff_plain,
 538         "blob" => \&git_blob,
 539         "blob_plain" => \&git_blob_plain,
 540         "commitdiff" => \&git_commitdiff,
 541         "commitdiff_plain" => \&git_commitdiff_plain,
 542         "commit" => \&git_commit,
 543         "forks" => \&git_forks,
 544         "heads" => \&git_heads,
 545         "history" => \&git_history,
 546         "log" => \&git_log,
 547         "rss" => \&git_rss,
 548         "atom" => \&git_atom,
 549         "search" => \&git_search,
 550         "search_help" => \&git_search_help,
 551         "shortlog" => \&git_shortlog,
 552         "summary" => \&git_summary,
 553         "tag" => \&git_tag,
 554         "tags" => \&git_tags,
 555         "tree" => \&git_tree,
 556         "snapshot" => \&git_snapshot,
 557         "object" => \&git_object,
 558         # those below don't need $project
 559         "opml" => \&git_opml,
 560         "project_list" => \&git_project_list,
 561         "project_index" => \&git_project_index,
 562 );
 563
 564 if (!defined $action) {
 565         if (defined $hash) {
 566                 $action = git_get_type($hash);
 567         } elsif (defined $hash_base && defined $file_name) {
 568                 $action = git_get_type("$hash_base:$file_name");
 569         } elsif (defined $project) {
 570                 $action = 'summary';
 571         } else {
 572                 $action = 'project_list';
 573         }
 574 }
 575 if (!defined($actions{$action})) {
 576         die_error(undef, "Unknown action");
 577 }
 578 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 579     !$project) {
 580         die_error(undef, "Project needed");
 581 }
 582 $actions{$action}->();
 583 exit;
 584
 585 ## ======================================================================
 586 ## action links
 587
 588 sub href(%) {
 589         my %params = @_;
 590         # default is to use -absolute url() i.e. $my_uri
 591         my $href = $params{-full} ? $my_url : $my_uri;
 592
 593         # XXX: Warning: If you touch this, check the search form for updating,
 594         # too.
 595
 596         my @mapping = (
 597                 project => "p",
 598                 action => "a",
 599                 file_name => "f",
 600                 file_parent => "fp",
 601                 hash => "h",
 602                 hash_parent => "hp",
 603                 hash_base => "hb",
 604                 hash_parent_base => "hpb",
 605                 page => "pg",
 606                 order => "o",
 607                 searchtext => "s",
 608                 searchtype => "st",
 609                 snapshot_format => "sf",
 610                 extra_options => "opt",
 611         );
 612         my %mapping = @mapping;
 613
 614         $params{'project'} = $project unless exists $params{'project'};
 615
 616         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 617         if ($use_pathinfo) {
 618                 # use PATH_INFO for project name
 619                 $href .= "/$params{'project'}" if defined $params{'project'};
 620                 delete $params{'project'};
 621
 622                 # Summary just uses the project path URL
 623                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 624                         delete $params{'action'};
 625                 }
 626         }
 627
 628         # now encode the parameters explicitly
 629         my @result = ();
 630         for (my $i = 0; $i < @mapping; $i += 2) {
 631                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 632                 if (defined $params{$name}) {
 633                         push @result, $symbol . "=" . esc_param($params{$name});
 634                 }
 635         }
 636         $href .= "?" . join(';', @result) if scalar @result;
 637
 638         return $href;
 639 }
 640
 641
 642 ## ======================================================================
 643 ## validation, quoting/unquoting and escaping
 644
 645 sub validate_pathname {
 646         my $input = shift || return undef;
 647
 648         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 649         # at the beginning, at the end, and between slashes.
 650         # also this catches doubled slashes
 651         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 652                 return undef;
 653         }
 654         # no null characters
 655         if ($input =~ m!\0!) {
 656                 return undef;
 657         }
 658         return $input;
 659 }
 660
 661 sub validate_refname {
 662         my $input = shift || return undef;
 663
 664         # textual hashes are O.K.
 665         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 666                 return $input;
 667         }
 668         # it must be correct pathname
 669         $input = validate_pathname($input)
 670                 or return undef;
 671         # restrictions on ref name according to git-check-ref-format
 672         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 673                 return undef;
 674         }
 675         return $input;
 676 }
 677
 678 # decode sequences of octets in utf8 into Perl's internal form,
 679 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 680 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 681 sub to_utf8 {
 682         my $str = shift;
 683         my $res;
 684         eval { $res = decode_utf8($str, Encode::FB_CROAK); };
 685         if (defined $res) {
 686                 return $res;
 687         } else {
 688                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 689         }
 690 }
 691
 692 # quote unsafe chars, but keep the slash, even when it's not
 693 # correct, but quoted slashes look too horrible in bookmarks
 694 sub esc_param {
 695         my $str = shift;
 696         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 697         $str =~ s/\+/%2B/g;
 698         $str =~ s/ /\+/g;
 699         return $str;
 700 }
 701
 702 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 703 sub esc_url {
 704         my $str = shift;
 705         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 706         $str =~ s/\+/%2B/g;
 707         $str =~ s/ /\+/g;
 708         return $str;
 709 }
 710
 711 # replace invalid utf8 character with SUBSTITUTION sequence
 712 sub esc_html ($;%) {
 713         my $str = shift;
 714         my %opts = @_;
 715
 716         $str = to_utf8($str);
 717         $str = $cgi->escapeHTML($str);
 718         if ($opts{'-nbsp'}) {
 719                 $str =~ s/ /&nbsp;/g;
 720         }
 721         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 722         return $str;
 723 }
 724
 725 # quote control characters and escape filename to HTML
 726 sub esc_path {
 727         my $str = shift;
 728         my %opts = @_;
 729
 730         $str = to_utf8($str);
 731         $str = $cgi->escapeHTML($str);
 732         if ($opts{'-nbsp'}) {
 733                 $str =~ s/ /&nbsp;/g;
 734         }
 735         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 736         return $str;
 737 }
 738
 739 # Make control characters "printable", using character escape codes (CEC)
 740 sub quot_cec {
 741         my $cntrl = shift;
 742         my %es = ( # character escape codes, aka escape sequences
 743                    "\t" => '\t',   # tab            (HT)
 744                    "\n" => '\n',   # line feed      (LF)
 745                    "\r" => '\r',   # carrige return (CR)
 746                    "\f" => '\f',   # form feed      (FF)
 747                    "\b" => '\b',   # backspace      (BS)
 748                    "\a" => '\a',   # alarm (bell)   (BEL)
 749                    "\e" => '\e',   # escape         (ESC)
 750                    "\013" => '\v', # vertical tab   (VT)
 751                    "\000" => '\0', # nul character  (NUL)
 752                    );
 753         my $chr = ( (exists $es{$cntrl})
 754                     ? $es{$cntrl}
 755                     : sprintf('\%03o', ord($cntrl)) );
 756         return "<span class=\"cntrl\">$chr</span>";
 757 }
 758
 759 # Alternatively use unicode control pictures codepoints,
 760 # Unicode "printable representation" (PR)
 761 sub quot_upr {
 762         my $cntrl = shift;
 763         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 764         return "<span class=\"cntrl\">$chr</span>";
 765 }
 766
 767 # git may return quoted and escaped filenames
 768 sub unquote {
 769         my $str = shift;
 770
 771         sub unq {
 772                 my $seq = shift;
 773                 my %es = ( # character escape codes, aka escape sequences
 774                         't' => "\t",   # tab            (HT, TAB)
 775                         'n' => "\n",   # newline        (NL)
 776                         'r' => "\r",   # return         (CR)
 777                         'f' => "\f",   # form feed      (FF)
 778                         'b' => "\b",   # backspace      (BS)
 779                         'a' => "\a",   # alarm (bell)   (BEL)
 780                         'e' => "\e",   # escape         (ESC)
 781                         'v' => "\013", # vertical tab   (VT)
 782                 );
 783
 784                 if ($seq =~ m/^[0-7]{1,3}$/) {
 785                         # octal char sequence
 786                         return chr(oct($seq));
 787                 } elsif (exists $es{$seq}) {
 788                         # C escape sequence, aka character escape code
 789                         return $es{$seq}
 790                 }
 791                 # quoted ordinary character
 792                 return $seq;
 793         }
 794
 795         if ($str =~ m/^"(.*)"$/) {
 796                 # needs unquoting
 797                 $str = $1;
 798                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 799         }
 800         return $str;
 801 }
 802
 803 # escape tabs (convert tabs to spaces)
 804 sub untabify {
 805         my $line = shift;
 806
 807         while ((my $pos = index($line, "\t")) != -1) {
 808                 if (my $count = (8 - ($pos % 8))) {
 809                         my $spaces = ' ' x $count;
 810                         $line =~ s/\t/$spaces/;
 811                 }
 812         }
 813
 814         return $line;
 815 }
 816
 817 sub project_in_list {
 818         my $project = shift;
 819         my @list = git_get_projects_list();
 820         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 821 }
 822
 823 ## ----------------------------------------------------------------------
 824 ## HTML aware string manipulation
 825
 826 sub chop_str {
 827         my $str = shift;
 828         my $len = shift;
 829         my $add_len = shift || 10;
 830
 831         # allow only $len chars, but don't cut a word if it would fit in $add_len
 832         # if it doesn't fit, cut it if it's still longer than the dots we would add
 833         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 834         my $body = $1;
 835         my $tail = $2;
 836         if (length($tail) > 4) {
 837                 $tail = " ...";
 838                 $body =~ s/&[^;]*$//; # remove chopped character entities
 839         }
 840         return "$body$tail";
 841 }
 842
 843 ## ----------------------------------------------------------------------
 844 ## functions returning short strings
 845
 846 # CSS class for given age value (in seconds)
 847 sub age_class {
 848         my $age = shift;
 849
 850         if (!defined $age) {
 851                 return "noage";
 852         } elsif ($age < 60*60*2) {
 853                 return "age0";
 854         } elsif ($age < 60*60*24*2) {
 855                 return "age1";
 856         } else {
 857                 return "age2";
 858         }
 859 }
 860
 861 # convert age in seconds to "nn units ago" string
 862 sub age_string {
 863         my $age = shift;
 864         my $age_str;
 865
 866         if ($age > 60*60*24*365*2) {
 867                 $age_str = (int $age/60/60/24/365);
 868                 $age_str .= " years ago";
 869         } elsif ($age > 60*60*24*(365/12)*2) {
 870                 $age_str = int $age/60/60/24/(365/12);
 871                 $age_str .= " months ago";
 872         } elsif ($age > 60*60*24*7*2) {
 873                 $age_str = int $age/60/60/24/7;
 874                 $age_str .= " weeks ago";
 875         } elsif ($age > 60*60*24*2) {
 876                 $age_str = int $age/60/60/24;
 877                 $age_str .= " days ago";
 878         } elsif ($age > 60*60*2) {
 879                 $age_str = int $age/60/60;
 880                 $age_str .= " hours ago";
 881         } elsif ($age > 60*2) {
 882                 $age_str = int $age/60;
 883                 $age_str .= " min ago";
 884         } elsif ($age > 2) {
 885                 $age_str = int $age;
 886                 $age_str .= " sec ago";
 887         } else {
 888                 $age_str .= " right now";
 889         }
 890         return $age_str;
 891 }
 892
 893 use constant {
 894         S_IFINVALID => 0030000,
 895         S_IFGITLINK => 0160000,
 896 };
 897
 898 # submodule/subproject, a commit object reference
 899 sub S_ISGITLINK($) {
 900         my $mode = shift;
 901
 902         return (($mode & S_IFMT) == S_IFGITLINK)
 903 }
 904
 905 # convert file mode in octal to symbolic file mode string
 906 sub mode_str {
 907         my $mode = oct shift;
 908
 909         if (S_ISGITLINK($mode)) {
 910                 return 'm---------';
 911         } elsif (S_ISDIR($mode & S_IFMT)) {
 912                 return 'drwxr-xr-x';
 913         } elsif (S_ISLNK($mode)) {
 914                 return 'lrwxrwxrwx';
 915         } elsif (S_ISREG($mode)) {
 916                 # git cares only about the executable bit
 917                 if ($mode & S_IXUSR) {
 918                         return '-rwxr-xr-x';
 919                 } else {
 920                         return '-rw-r--r--';
 921                 };
 922         } else {
 923                 return '----------';
 924         }
 925 }
 926
 927 # convert file mode in octal to file type string
 928 sub file_type {
 929         my $mode = shift;
 930
 931         if ($mode !~ m/^[0-7]+$/) {
 932                 return $mode;
 933         } else {
 934                 $mode = oct $mode;
 935         }
 936
 937         if (S_ISGITLINK($mode)) {
 938                 return "submodule";
 939         } elsif (S_ISDIR($mode & S_IFMT)) {
 940                 return "directory";
 941         } elsif (S_ISLNK($mode)) {
 942                 return "symlink";
 943         } elsif (S_ISREG($mode)) {
 944                 return "file";
 945         } else {
 946                 return "unknown";
 947         }
 948 }
 949
 950 # convert file mode in octal to file type description string
 951 sub file_type_long {
 952         my $mode = shift;
 953
 954         if ($mode !~ m/^[0-7]+$/) {
 955                 return $mode;
 956         } else {
 957                 $mode = oct $mode;
 958         }
 959
 960         if (S_ISGITLINK($mode)) {
 961                 return "submodule";
 962         } elsif (S_ISDIR($mode & S_IFMT)) {
 963                 return "directory";
 964         } elsif (S_ISLNK($mode)) {
 965                 return "symlink";
 966         } elsif (S_ISREG($mode)) {
 967                 if ($mode & S_IXUSR) {
 968                         return "executable";
 969                 } else {
 970                         return "file";
 971                 };
 972         } else {
 973                 return "unknown";
 974         }
 975 }
 976
 977
 978 ## ----------------------------------------------------------------------
 979 ## functions returning short HTML fragments, or transforming HTML fragments
 980 ## which don't belong to other sections
 981
 982 # format line of commit message.
 983 sub format_log_line_html {
 984         my $line = shift;
 985
 986         $line = esc_html($line, -nbsp=>1);
 987         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 988                 my $hash_text = $1;
 989                 my $link =
 990                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 991                                 -class => "text"}, $hash_text);
 992                 $line =~ s/$hash_text/$link/;
 993         }
 994         return $line;
 995 }
 996
 997 # format marker of refs pointing to given object
 998 sub format_ref_marker {
 999         my ($refs, $id) = @_;
1000         my $markers = '';
1001
1002         if (defined $refs->{$id}) {
1003                 foreach my $ref (@{$refs->{$id}}) {
1004                         my ($type, $name) = qw();
1005                         # e.g. tags/v2.6.11 or heads/next
1006                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1007                                 $type = $1;
1008                                 $name = $2;
1009                         } else {
1010                                 $type = "ref";
1011                                 $name = $ref;
1012                         }
1013
1014                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1015                                     esc_html($name) . "</span>";
1016                 }
1017         }
1018
1019         if ($markers) {
1020                 return ' <span class="refs">'. $markers . '</span>';
1021         } else {
1022                 return "";
1023         }
1024 }
1025
1026 # format, perhaps shortened and with markers, title line
1027 sub format_subject_html {
1028         my ($long, $short, $href, $extra) = @_;
1029         $extra = '' unless defined($extra);
1030
1031         if (length($short) < length($long)) {
1032                 return $cgi->a({-href => $href, -class => "list subject",
1033                                 -title => to_utf8($long)},
1034                        esc_html($short) . $extra);
1035         } else {
1036                 return $cgi->a({-href => $href, -class => "list subject"},
1037                        esc_html($long)  . $extra);
1038         }
1039 }
1040
1041 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1042 sub format_git_diff_header_line {
1043         my $line = shift;
1044         my $diffinfo = shift;
1045         my ($from, $to) = @_;
1046
1047         if ($diffinfo->{'nparents'}) {
1048                 # combined diff
1049                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1050                 if ($to->{'href'}) {
1051                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1052                                          esc_path($to->{'file'}));
1053                 } else { # file was deleted (no href)
1054                         $line .= esc_path($to->{'file'});
1055                 }
1056         } else {
1057                 # "ordinary" diff
1058                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1059                 if ($from->{'href'}) {
1060                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1061                                          'a/' . esc_path($from->{'file'}));
1062                 } else { # file was added (no href)
1063                         $line .= 'a/' . esc_path($from->{'file'});
1064                 }
1065                 $line .= ' ';
1066                 if ($to->{'href'}) {
1067                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1068                                          'b/' . esc_path($to->{'file'}));
1069                 } else { # file was deleted
1070                         $line .= 'b/' . esc_path($to->{'file'});
1071                 }
1072         }
1073
1074         return "<div class=\"diff header\">$line</div>\n";
1075 }
1076
1077 # format extended diff header line, before patch itself
1078 sub format_extended_diff_header_line {
1079         my $line = shift;
1080         my $diffinfo = shift;
1081         my ($from, $to) = @_;
1082
1083         # match <path>
1084         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1085                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1086                                        esc_path($from->{'file'}));
1087         }
1088         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1089                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1090                                  esc_path($to->{'file'}));
1091         }
1092         # match single <mode>
1093         if ($line =~ m/\s(\d{6})$/) {
1094                 $line .= '<span class="info"> (' .
1095                          file_type_long($1) .
1096                          ')</span>';
1097         }
1098         # match <hash>
1099         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1100                 # can match only for combined diff
1101                 $line = 'index ';
1102                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1103                         if ($from->{'href'}[$i]) {
1104                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1105                                                   -class=>"hash"},
1106                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1107                         } else {
1108                                 $line .= '0' x 7;
1109                         }
1110                         # separator
1111                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1112                 }
1113                 $line .= '..';
1114                 if ($to->{'href'}) {
1115                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1116                                          substr($diffinfo->{'to_id'},0,7));
1117                 } else {
1118                         $line .= '0' x 7;
1119                 }
1120
1121         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1122                 # can match only for ordinary diff
1123                 my ($from_link, $to_link);
1124                 if ($from->{'href'}) {
1125                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1126                                              substr($diffinfo->{'from_id'},0,7));
1127                 } else {
1128                         $from_link = '0' x 7;
1129                 }
1130                 if ($to->{'href'}) {
1131                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1132                                            substr($diffinfo->{'to_id'},0,7));
1133                 } else {
1134                         $to_link = '0' x 7;
1135                 }
1136                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1137                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1138         }
1139
1140         return $line . "<br/>\n";
1141 }
1142
1143 # format from-file/to-file diff header
1144 sub format_diff_from_to_header {
1145         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1146         my $line;
1147         my $result = '';
1148
1149         $line = $from_line;
1150         #assert($line =~ m/^---/) if DEBUG;
1151         # no extra formatting for "^--- /dev/null"
1152         if (! $diffinfo->{'nparents'}) {
1153                 # ordinary (single parent) diff
1154                 if ($line =~ m!^--- "?a/!) {
1155                         if ($from->{'href'}) {
1156                                 $line = '--- a/' .
1157                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1158                                                 esc_path($from->{'file'}));
1159                         } else {
1160                                 $line = '--- a/' .
1161                                         esc_path($from->{'file'});
1162                         }
1163                 }
1164                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1165
1166         } else {
1167                 # combined diff (merge commit)
1168                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1169                         if ($from->{'href'}[$i]) {
1170                                 $line = '--- ' .
1171                                         $cgi->a({-href=>href(action=>"blobdiff",
1172                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1173                                                              hash_parent_base=>$parents[$i],
1174                                                              file_parent=>$from->{'file'}[$i],
1175                                                              hash=>$diffinfo->{'to_id'},
1176                                                              hash_base=>$hash,
1177                                                              file_name=>$to->{'file'}),
1178                                                  -class=>"path",
1179                                                  -title=>"diff" . ($i+1)},
1180                                                 $i+1) .
1181                                         '/' .
1182                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1183                                                 esc_path($from->{'file'}[$i]));
1184                         } else {
1185                                 $line = '--- /dev/null';
1186                         }
1187                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1188                 }
1189         }
1190
1191         $line = $to_line;
1192         #assert($line =~ m/^\+\+\+/) if DEBUG;
1193         # no extra formatting for "^+++ /dev/null"
1194         if ($line =~ m!^\+\+\+ "?b/!) {
1195                 if ($to->{'href'}) {
1196                         $line = '+++ b/' .
1197                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1198                                         esc_path($to->{'file'}));
1199                 } else {
1200                         $line = '+++ b/' .
1201                                 esc_path($to->{'file'});
1202                 }
1203         }
1204         $result .= qq!<div class="diff to_file">$line</div>\n!;
1205
1206         return $result;
1207 }
1208
1209 # create note for patch simplified by combined diff
1210 sub format_diff_cc_simplified {
1211         my ($diffinfo, @parents) = @_;
1212         my $result = '';
1213
1214         $result .= "<div class=\"diff header\">" .
1215                    "diff --cc ";
1216         if (!is_deleted($diffinfo)) {
1217                 $result .= $cgi->a({-href => href(action=>"blob",
1218                                                   hash_base=>$hash,
1219                                                   hash=>$diffinfo->{'to_id'},
1220                                                   file_name=>$diffinfo->{'to_file'}),
1221                                     -class => "path"},
1222                                    esc_path($diffinfo->{'to_file'}));
1223         } else {
1224                 $result .= esc_path($diffinfo->{'to_file'});
1225         }
1226         $result .= "</div>\n" . # class="diff header"
1227                    "<div class=\"diff nodifferences\">" .
1228                    "Simple merge" .
1229                    "</div>\n"; # class="diff nodifferences"
1230
1231         return $result;
1232 }
1233
1234 # format patch (diff) line (not to be used for diff headers)
1235 sub format_diff_line {
1236         my $line = shift;
1237         my ($from, $to) = @_;
1238         my $diff_class = "";
1239
1240         chomp $line;
1241
1242         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1243                 # combined diff
1244                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1245                 if ($line =~ m/^\@{3}/) {
1246                         $diff_class = " chunk_header";
1247                 } elsif ($line =~ m/^\\/) {
1248                         $diff_class = " incomplete";
1249                 } elsif ($prefix =~ tr/+/+/) {
1250                         $diff_class = " add";
1251                 } elsif ($prefix =~ tr/-/-/) {
1252                         $diff_class = " rem";
1253                 }
1254         } else {
1255                 # assume ordinary diff
1256                 my $char = substr($line, 0, 1);
1257                 if ($char eq '+') {
1258                         $diff_class = " add";
1259                 } elsif ($char eq '-') {
1260                         $diff_class = " rem";
1261                 } elsif ($char eq '@') {
1262                         $diff_class = " chunk_header";
1263                 } elsif ($char eq "\\") {
1264                         $diff_class = " incomplete";
1265                 }
1266         }
1267         $line = untabify($line);
1268         if ($from && $to && $line =~ m/^\@{2} /) {
1269                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1270                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1271
1272                 $from_lines = 0 unless defined $from_lines;
1273                 $to_lines   = 0 unless defined $to_lines;
1274
1275                 if ($from->{'href'}) {
1276                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1277                                              -class=>"list"}, $from_text);
1278                 }
1279                 if ($to->{'href'}) {
1280                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1281                                              -class=>"list"}, $to_text);
1282                 }
1283                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1284                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1285                 return "<div class=\"diff$diff_class\">$line</div>\n";
1286         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1287                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1288                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1289
1290                 @from_text = split(' ', $ranges);
1291                 for (my $i = 0; $i < @from_text; ++$i) {
1292                         ($from_start[$i], $from_nlines[$i]) =
1293                                 (split(',', substr($from_text[$i], 1)), 0);
1294                 }
1295
1296                 $to_text   = pop @from_text;
1297                 $to_start  = pop @from_start;
1298                 $to_nlines = pop @from_nlines;
1299
1300                 $line = "<span class=\"chunk_info\">$prefix ";
1301                 for (my $i = 0; $i < @from_text; ++$i) {
1302                         if ($from->{'href'}[$i]) {
1303                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1304                                                   -class=>"list"}, $from_text[$i]);
1305                         } else {
1306                                 $line .= $from_text[$i];
1307                         }
1308                         $line .= " ";
1309                 }
1310                 if ($to->{'href'}) {
1311                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1312                                           -class=>"list"}, $to_text);
1313                 } else {
1314                         $line .= $to_text;
1315                 }
1316                 $line .= " $prefix</span>" .
1317                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1318                 return "<div class=\"diff$diff_class\">$line</div>\n";
1319         }
1320         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1321 }
1322
1323 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1324 # linked.  Pass the hash of the tree/commit to snapshot.
1325 sub format_snapshot_links {
1326         my ($hash) = @_;
1327         my @snapshot_fmts = gitweb_check_feature('snapshot');
1328         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1329         my $num_fmts = @snapshot_fmts;
1330         if ($num_fmts > 1) {
1331                 # A parenthesized list of links bearing format names.
1332                 # e.g. "snapshot (_tar.gz_ _zip_)"
1333                 return "snapshot (" . join(' ', map
1334                         $cgi->a({
1335                                 -href => href(
1336                                         action=>"snapshot",
1337                                         hash=>$hash,
1338                                         snapshot_format=>$_
1339                                 )
1340                         }, $known_snapshot_formats{$_}{'display'})
1341                 , @snapshot_fmts) . ")";
1342         } elsif ($num_fmts == 1) {
1343                 # A single "snapshot" link whose tooltip bears the format name.
1344                 # i.e. "_snapshot_"
1345                 my ($fmt) = @snapshot_fmts;
1346                 return
1347                         $cgi->a({
1348                                 -href => href(
1349                                         action=>"snapshot",
1350                                         hash=>$hash,
1351                                         snapshot_format=>$fmt
1352                                 ),
1353                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1354                         }, "snapshot");
1355         } else { # $num_fmts == 0
1356                 return undef;
1357         }
1358 }
1359
1360 ## ----------------------------------------------------------------------
1361 ## git utility subroutines, invoking git commands
1362
1363 # returns path to the core git executable and the --git-dir parameter as list
1364 sub git_cmd {
1365         return $GIT, '--git-dir='.$git_dir;
1366 }
1367
1368 # returns path to the core git executable and the --git-dir parameter as string
1369 sub git_cmd_str {
1370         return join(' ', git_cmd());
1371 }
1372
1373 # get HEAD ref of given project as hash
1374 sub git_get_head_hash {
1375         my $project = shift;
1376         my $o_git_dir = $git_dir;
1377         my $retval = undef;
1378         $git_dir = "$projectroot/$project";
1379         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1380                 my $head = <$fd>;
1381                 close $fd;
1382                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1383                         $retval = $1;
1384                 }
1385         }
1386         if (defined $o_git_dir) {
1387                 $git_dir = $o_git_dir;
1388         }
1389         return $retval;
1390 }
1391
1392 # get type of given object
1393 sub git_get_type {
1394         my $hash = shift;
1395
1396         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1397         my $type = <$fd>;
1398         close $fd or return;
1399         chomp $type;
1400         return $type;
1401 }
1402
1403 sub git_get_project_config {
1404         my ($key, $type) = @_;
1405
1406         return unless ($key);
1407         $key =~ s/^gitweb\.//;
1408         return if ($key =~ m/\W/);
1409
1410         my @x = (git_cmd(), 'config');
1411         if (defined $type) { push @x, $type; }
1412         push @x, "--get";
1413         push @x, "gitweb.$key";
1414         my $val = qx(@x);
1415         chomp $val;
1416         return ($val);
1417 }
1418
1419 # get hash of given path at given ref
1420 sub git_get_hash_by_path {
1421         my $base = shift;
1422         my $path = shift || return undef;
1423         my $type = shift;
1424
1425         $path =~ s,/+$,,;
1426
1427         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1428                 or die_error(undef, "Open git-ls-tree failed");
1429         my $line = <$fd>;
1430         close $fd or return undef;
1431
1432         if (!defined $line) {
1433                 # there is no tree or hash given by $path at $base
1434                 return undef;
1435         }
1436
1437         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1438         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1439         if (defined $type && $type ne $2) {
1440                 # type doesn't match
1441                 return undef;
1442         }
1443         return $3;
1444 }
1445
1446 # get path of entry with given hash at given tree-ish (ref)
1447 # used to get 'from' filename for combined diff (merge commit) for renames
1448 sub git_get_path_by_hash {
1449         my $base = shift || return;
1450         my $hash = shift || return;
1451
1452         local $/ = "\0";
1453
1454         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1455                 or return undef;
1456         while (my $line = <$fd>) {
1457                 chomp $line;
1458
1459                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1460                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1461                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1462                         close $fd;
1463                         return $1;
1464                 }
1465         }
1466         close $fd;
1467         return undef;
1468 }
1469
1470 ## ......................................................................
1471 ## git utility functions, directly accessing git repository
1472
1473 sub git_get_project_description {
1474         my $path = shift;
1475
1476         open my $fd, "$projectroot/$path/description" or return undef;
1477         my $descr = <$fd>;
1478         close $fd;
1479         if (defined $descr) {
1480                 chomp $descr;
1481         }
1482         return $descr;
1483 }
1484
1485 sub git_get_project_url_list {
1486         my $path = shift;
1487
1488         open my $fd, "$projectroot/$path/cloneurl" or return;
1489         my @git_project_url_list = map { chomp; $_ } <$fd>;
1490         close $fd;
1491
1492         return wantarray ? @git_project_url_list : \@git_project_url_list;
1493 }
1494
1495 sub git_get_projects_list {
1496         my ($filter) = @_;
1497         my @list;
1498
1499         $filter ||= '';
1500         $filter =~ s/\.git$//;
1501
1502         my ($check_forks) = gitweb_check_feature('forks');
1503
1504         if (-d $projects_list) {
1505                 # search in directory
1506                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1507                 # remove the trailing "/"
1508                 $dir =~ s!/+$!!;
1509                 my $pfxlen = length("$dir");
1510
1511                 File::Find::find({
1512                         follow_fast => 1, # follow symbolic links
1513                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1514                         wanted => sub {
1515                                 # skip project-list toplevel, if we get it.
1516                                 return if (m!^[/.]$!);
1517                                 # only directories can be git repositories
1518                                 return unless (-d $_);
1519
1520                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1521                                 # we check related file in $projectroot
1522                                 if ($check_forks and $subdir =~ m#/.#) {
1523                                         $File::Find::prune = 1;
1524                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1525                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1526                                         $File::Find::prune = 1;
1527                                 }
1528                         },
1529                 }, "$dir");
1530
1531         } elsif (-f $projects_list) {
1532                 # read from file(url-encoded):
1533                 # 'git%2Fgit.git Linus+Torvalds'
1534                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1535                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1536                 my %paths;
1537                 open my ($fd), $projects_list or return;
1538         PROJECT:
1539                 while (my $line = <$fd>) {
1540                         chomp $line;
1541                         my ($path, $owner) = split ' ', $line;
1542                         $path = unescape($path);
1543                         $owner = unescape($owner);
1544                         if (!defined $path) {
1545                                 next;
1546                         }
1547                         if ($filter ne '') {
1548                                 # looking for forks;
1549                                 my $pfx = substr($path, 0, length($filter));
1550                                 if ($pfx ne $filter) {
1551                                         next PROJECT;
1552                                 }
1553                                 my $sfx = substr($path, length($filter));
1554                                 if ($sfx !~ /^\/.*\.git$/) {
1555                                         next PROJECT;
1556                                 }
1557                         } elsif ($check_forks) {
1558                         PATH:
1559                                 foreach my $filter (keys %paths) {
1560                                         # looking for forks;
1561                                         my $pfx = substr($path, 0, length($filter));
1562                                         if ($pfx ne $filter) {
1563                                                 next PATH;
1564                                         }
1565                                         my $sfx = substr($path, length($filter));
1566                                         if ($sfx !~ /^\/.*\.git$/) {
1567                                                 next PATH;
1568                                         }
1569                                         # is a fork, don't include it in
1570                                         # the list
1571                                         next PROJECT;
1572                                 }
1573                         }
1574                         if (check_export_ok("$projectroot/$path")) {
1575                                 my $pr = {
1576                                         path => $path,
1577                                         owner => to_utf8($owner),
1578                                 };
1579                                 push @list, $pr;
1580                                 (my $forks_path = $path) =~ s/\.git$//;
1581                                 $paths{$forks_path}++;
1582                         }
1583                 }
1584                 close $fd;
1585         }
1586         return @list;
1587 }
1588
1589 our $gitweb_project_owner = undef;
1590 sub git_get_project_list_from_file {
1591
1592         return if (defined $gitweb_project_owner);
1593
1594         $gitweb_project_owner = {};
1595         # read from file (url-encoded):
1596         # 'git%2Fgit.git Linus+Torvalds'
1597         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1598         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1599         if (-f $projects_list) {
1600                 open (my $fd , $projects_list);
1601                 while (my $line = <$fd>) {
1602                         chomp $line;
1603                         my ($pr, $ow) = split ' ', $line;
1604                         $pr = unescape($pr);
1605                         $ow = unescape($ow);
1606                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1607                 }
1608                 close $fd;
1609         }
1610 }
1611
1612 sub git_get_project_owner {
1613         my $project = shift;
1614         my $owner;
1615
1616         return undef unless $project;
1617
1618         if (!defined $gitweb_project_owner) {
1619                 git_get_project_list_from_file();
1620         }
1621
1622         if (exists $gitweb_project_owner->{$project}) {
1623                 $owner = $gitweb_project_owner->{$project};
1624         }
1625         if (!defined $owner) {
1626                 $owner = get_file_owner("$projectroot/$project");
1627         }
1628
1629         return $owner;
1630 }
1631
1632 sub git_get_last_activity {
1633         my ($path) = @_;
1634         my $fd;
1635
1636         $git_dir = "$projectroot/$path";
1637         open($fd, "-|", git_cmd(), 'for-each-ref',
1638              '--format=%(committer)',
1639              '--sort=-committerdate',
1640              '--count=1',
1641              'refs/heads') or return;
1642         my $most_recent = <$fd>;
1643         close $fd or return;
1644         if (defined $most_recent &&
1645             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1646                 my $timestamp = $1;
1647                 my $age = time - $timestamp;
1648                 return ($age, age_string($age));
1649         }
1650         return (undef, undef);
1651 }
1652
1653 sub git_get_references {
1654         my $type = shift || "";
1655         my %refs;
1656         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1657         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1658         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1659                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1660                 or return;
1661
1662         while (my $line = <$fd>) {
1663                 chomp $line;
1664                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1665                         if (defined $refs{$1}) {
1666                                 push @{$refs{$1}}, $2;
1667                         } else {
1668                                 $refs{$1} = [ $2 ];
1669                         }
1670                 }
1671         }
1672         close $fd or return;
1673         return \%refs;
1674 }
1675
1676 sub git_get_rev_name_tags {
1677         my $hash = shift || return undef;
1678
1679         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1680                 or return;
1681         my $name_rev = <$fd>;
1682         close $fd;
1683
1684         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1685                 return $1;
1686         } else {
1687                 # catches also '$hash undefined' output
1688                 return undef;
1689         }
1690 }
1691
1692 ## ----------------------------------------------------------------------
1693 ## parse to hash functions
1694
1695 sub parse_date {
1696         my $epoch = shift;
1697         my $tz = shift || "-0000";
1698
1699         my %date;
1700         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1701         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1702         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1703         $date{'hour'} = $hour;
1704         $date{'minute'} = $min;
1705         $date{'mday'} = $mday;
1706         $date{'day'} = $days[$wday];
1707         $date{'month'} = $months[$mon];
1708         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1709                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1710         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1711                              $mday, $months[$mon], $hour ,$min;
1712         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1713                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1714
1715         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1716         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1717         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1718         $date{'hour_local'} = $hour;
1719         $date{'minute_local'} = $min;
1720         $date{'tz_local'} = $tz;
1721         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1722                                   1900+$year, $mon+1, $mday,
1723                                   $hour, $min, $sec, $tz);
1724         return %date;
1725 }
1726
1727 sub parse_tag {
1728         my $tag_id = shift;
1729         my %tag;
1730         my @comment;
1731
1732         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1733         $tag{'id'} = $tag_id;
1734         while (my $line = <$fd>) {
1735                 chomp $line;
1736                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1737                         $tag{'object'} = $1;
1738                 } elsif ($line =~ m/^type (.+)$/) {
1739                         $tag{'type'} = $1;
1740                 } elsif ($line =~ m/^tag (.+)$/) {
1741                         $tag{'name'} = $1;
1742                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1743                         $tag{'author'} = $1;
1744                         $tag{'epoch'} = $2;
1745                         $tag{'tz'} = $3;
1746                 } elsif ($line =~ m/--BEGIN/) {
1747                         push @comment, $line;
1748                         last;
1749                 } elsif ($line eq "") {
1750                         last;
1751                 }
1752         }
1753         push @comment, <$fd>;
1754         $tag{'comment'} = \@comment;
1755         close $fd or return;
1756         if (!defined $tag{'name'}) {
1757                 return
1758         };
1759         return %tag
1760 }
1761
1762 sub parse_commit_text {
1763         my ($commit_text, $withparents) = @_;
1764         my @commit_lines = split '\n', $commit_text;
1765         my %co;
1766
1767         pop @commit_lines; # Remove '\0'
1768
1769         if (! @commit_lines) {
1770                 return;
1771         }
1772
1773         my $header = shift @commit_lines;
1774         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1775                 return;
1776         }
1777         ($co{'id'}, my @parents) = split ' ', $header;
1778         while (my $line = shift @commit_lines) {
1779                 last if $line eq "\n";
1780                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1781                         $co{'tree'} = $1;
1782                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1783                         push @parents, $1;
1784                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1785                         $co{'author'} = $1;
1786                         $co{'author_epoch'} = $2;
1787                         $co{'author_tz'} = $3;
1788                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1789                                 $co{'author_name'}  = $1;
1790                                 $co{'author_email'} = $2;
1791                         } else {
1792                                 $co{'author_name'} = $co{'author'};
1793                         }
1794                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1795                         $co{'committer'} = $1;
1796                         $co{'committer_epoch'} = $2;
1797                         $co{'committer_tz'} = $3;
1798                         $co{'committer_name'} = $co{'committer'};
1799                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1800                                 $co{'committer_name'}  = $1;
1801                                 $co{'committer_email'} = $2;
1802                         } else {
1803                                 $co{'committer_name'} = $co{'committer'};
1804                         }
1805                 }
1806         }
1807         if (!defined $co{'tree'}) {
1808                 return;
1809         };
1810         $co{'parents'} = \@parents;
1811         $co{'parent'} = $parents[0];
1812
1813         foreach my $title (@commit_lines) {
1814                 $title =~ s/^    //;
1815                 if ($title ne "") {
1816                         $co{'title'} = chop_str($title, 80, 5);
1817                         # remove leading stuff of merges to make the interesting part visible
1818                         if (length($title) > 50) {
1819                                 $title =~ s/^Automatic //;
1820                                 $title =~ s/^merge (of|with) /Merge ... /i;
1821                                 if (length($title) > 50) {
1822                                         $title =~ s/(http|rsync):\/\///;
1823                                 }
1824                                 if (length($title) > 50) {
1825                                         $title =~ s/(master|www|rsync)\.//;
1826                                 }
1827                                 if (length($title) > 50) {
1828                                         $title =~ s/kernel.org:?//;
1829                                 }
1830                                 if (length($title) > 50) {
1831                                         $title =~ s/\/pub\/scm//;
1832                                 }
1833                         }
1834                         $co{'title_short'} = chop_str($title, 50, 5);
1835                         last;
1836                 }
1837         }
1838         if ($co{'title'} eq "") {
1839                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1840         }
1841         # remove added spaces
1842         foreach my $line (@commit_lines) {
1843                 $line =~ s/^    //;
1844         }
1845         $co{'comment'} = \@commit_lines;
1846
1847         my $age = time - $co{'committer_epoch'};
1848         $co{'age'} = $age;
1849         $co{'age_string'} = age_string($age);
1850         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1851         if ($age > 60*60*24*7*2) {
1852                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1853                 $co{'age_string_age'} = $co{'age_string'};
1854         } else {
1855                 $co{'age_string_date'} = $co{'age_string'};
1856                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1857         }
1858         return %co;
1859 }
1860
1861 sub parse_commit {
1862         my ($commit_id) = @_;
1863         my %co;
1864
1865         local $/ = "\0";
1866
1867         open my $fd, "-|", git_cmd(), "rev-list",
1868                 "--parents",
1869                 "--header",
1870                 "--max-count=1",
1871                 $commit_id,
1872                 "--",
1873                 or die_error(undef, "Open git-rev-list failed");
1874         %co = parse_commit_text(<$fd>, 1);
1875         close $fd;
1876
1877         return %co;
1878 }
1879
1880 sub parse_commits {
1881         my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
1882         my @cos;
1883
1884         $maxcount ||= 1;
1885         $skip ||= 0;
1886
1887         local $/ = "\0";
1888
1889         open my $fd, "-|", git_cmd(), "rev-list",
1890                 "--header",
1891                 ($arg ? ($arg) : ()),
1892                 ("--max-count=" . $maxcount),
1893                 ("--skip=" . $skip),
1894                 @extra_options,
1895                 $commit_id,
1896                 "--",
1897                 ($filename ? ($filename) : ())
1898                 or die_error(undef, "Open git-rev-list failed");
1899         while (my $line = <$fd>) {
1900                 my %co = parse_commit_text($line);
1901                 push @cos, \%co;
1902         }
1903         close $fd;
1904
1905         return wantarray ? @cos : \@cos;
1906 }
1907
1908 # parse ref from ref_file, given by ref_id, with given type
1909 sub parse_ref {
1910         my $ref_file = shift;
1911         my $ref_id = shift;
1912         my $type = shift || git_get_type($ref_id);
1913         my %ref_item;
1914
1915         $ref_item{'type'} = $type;
1916         $ref_item{'id'} = $ref_id;
1917         $ref_item{'epoch'} = 0;
1918         $ref_item{'age'} = "unknown";
1919         if ($type eq "tag") {
1920                 my %tag = parse_tag($ref_id);
1921                 $ref_item{'comment'} = $tag{'comment'};
1922                 if ($tag{'type'} eq "commit") {
1923                         my %co = parse_commit($tag{'object'});
1924                         $ref_item{'epoch'} = $co{'committer_epoch'};
1925                         $ref_item{'age'} = $co{'age_string'};
1926                 } elsif (defined($tag{'epoch'})) {
1927                         my $age = time - $tag{'epoch'};
1928                         $ref_item{'epoch'} = $tag{'epoch'};
1929                         $ref_item{'age'} = age_string($age);
1930                 }
1931                 $ref_item{'reftype'} = $tag{'type'};
1932                 $ref_item{'name'} = $tag{'name'};
1933                 $ref_item{'refid'} = $tag{'object'};
1934         } elsif ($type eq "commit"){
1935                 my %co = parse_commit($ref_id);
1936                 $ref_item{'reftype'} = "commit";
1937                 $ref_item{'name'} = $ref_file;
1938                 $ref_item{'title'} = $co{'title'};
1939                 $ref_item{'refid'} = $ref_id;
1940                 $ref_item{'epoch'} = $co{'committer_epoch'};
1941                 $ref_item{'age'} = $co{'age_string'};
1942         } else {
1943                 $ref_item{'reftype'} = $type;
1944                 $ref_item{'name'} = $ref_file;
1945                 $ref_item{'refid'} = $ref_id;
1946         }
1947
1948         return %ref_item;
1949 }
1950
1951 # parse line of git-diff-tree "raw" output
1952 sub parse_difftree_raw_line {
1953         my $line = shift;
1954         my %res;
1955
1956         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1957         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1958         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1959                 $res{'from_mode'} = $1;
1960                 $res{'to_mode'} = $2;
1961                 $res{'from_id'} = $3;
1962                 $res{'to_id'} = $4;
1963                 $res{'status'} = $5;
1964                 $res{'similarity'} = $6;
1965                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1966                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1967                 } else {
1968                         $res{'file'} = unquote($7);
1969                 }
1970         }
1971         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
1972         # combined diff (for merge commit)
1973         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
1974                 $res{'nparents'}  = length($1);
1975                 $res{'from_mode'} = [ split(' ', $2) ];
1976                 $res{'to_mode'} = pop @{$res{'from_mode'}};
1977                 $res{'from_id'} = [ split(' ', $3) ];
1978                 $res{'to_id'} = pop @{$res{'from_id'}};
1979                 $res{'status'} = [ split('', $4) ];
1980                 $res{'to_file'} = unquote($5);
1981         }
1982         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1983         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1984                 $res{'commit'} = $1;
1985         }
1986
1987         return wantarray ? %res : \%res;
1988 }
1989
1990 # parse line of git-ls-tree output
1991 sub parse_ls_tree_line ($;%) {
1992         my $line = shift;
1993         my %opts = @_;
1994         my %res;
1995
1996         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1997         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
1998
1999         $res{'mode'} = $1;
2000         $res{'type'} = $2;
2001         $res{'hash'} = $3;
2002         if ($opts{'-z'}) {
2003                 $res{'name'} = $4;
2004         } else {
2005                 $res{'name'} = unquote($4);
2006         }
2007
2008         return wantarray ? %res : \%res;
2009 }
2010
2011 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2012 sub parse_from_to_diffinfo {
2013         my ($diffinfo, $from, $to, @parents) = @_;
2014
2015         if ($diffinfo->{'nparents'}) {
2016                 # combined diff
2017                 $from->{'file'} = [];
2018                 $from->{'href'} = [];
2019                 fill_from_file_info($diffinfo, @parents)
2020                         unless exists $diffinfo->{'from_file'};
2021                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2022                         $from->{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
2023                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2024                                 $from->{'href'}[$i] = href(action=>"blob",
2025                                                            hash_base=>$parents[$i],
2026                                                            hash=>$diffinfo->{'from_id'}[$i],
2027                                                            file_name=>$from->{'file'}[$i]);
2028                         } else {
2029                                 $from->{'href'}[$i] = undef;
2030                         }
2031                 }
2032         } else {
2033                 $from->{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2034                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2035                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2036                                                hash=>$diffinfo->{'from_id'},
2037                                                file_name=>$from->{'file'});
2038                 } else {
2039                         delete $from->{'href'};
2040                 }
2041         }
2042
2043         $to->{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
2044         if (!is_deleted($diffinfo)) { # file exists in result
2045                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2046                                      hash=>$diffinfo->{'to_id'},
2047                                      file_name=>$to->{'file'});
2048         } else {
2049                 delete $to->{'href'};
2050         }
2051 }
2052
2053 ## ......................................................................
2054 ## parse to array of hashes functions
2055
2056 sub git_get_heads_list {
2057         my $limit = shift;
2058         my @headslist;
2059
2060         open my $fd, '-|', git_cmd(), 'for-each-ref',
2061                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2062                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2063                 'refs/heads'
2064                 or return;
2065         while (my $line = <$fd>) {
2066                 my %ref_item;
2067
2068                 chomp $line;
2069                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2070                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2071                 my ($committer, $epoch, $tz) =
2072                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2073                 $name =~ s!^refs/heads/!!;
2074
2075                 $ref_item{'name'}  = $name;
2076                 $ref_item{'id'}    = $hash;
2077                 $ref_item{'title'} = $title || '(no commit message)';
2078                 $ref_item{'epoch'} = $epoch;
2079                 if ($epoch) {
2080                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2081                 } else {
2082                         $ref_item{'age'} = "unknown";
2083                 }
2084
2085                 push @headslist, \%ref_item;
2086         }
2087         close $fd;
2088
2089         return wantarray ? @headslist : \@headslist;
2090 }
2091
2092 sub git_get_tags_list {
2093         my $limit = shift;
2094         my @tagslist;
2095
2096         open my $fd, '-|', git_cmd(), 'for-each-ref',
2097                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2098                 '--format=%(objectname) %(objecttype) %(refname) '.
2099                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2100                 'refs/tags'
2101                 or return;
2102         while (my $line = <$fd>) {
2103                 my %ref_item;
2104
2105                 chomp $line;
2106                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2107                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2108                 my ($creator, $epoch, $tz) =
2109                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2110                 $name =~ s!^refs/tags/!!;
2111
2112                 $ref_item{'type'} = $type;
2113                 $ref_item{'id'} = $id;
2114                 $ref_item{'name'} = $name;
2115                 if ($type eq "tag") {
2116                         $ref_item{'subject'} = $title;
2117                         $ref_item{'reftype'} = $reftype;
2118                         $ref_item{'refid'}   = $refid;
2119                 } else {
2120                         $ref_item{'reftype'} = $type;
2121                         $ref_item{'refid'}   = $id;
2122                 }
2123
2124                 if ($type eq "tag" || $type eq "commit") {
2125                         $ref_item{'epoch'} = $epoch;
2126                         if ($epoch) {
2127                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2128                         } else {
2129                                 $ref_item{'age'} = "unknown";
2130                         }
2131                 }
2132
2133                 push @tagslist, \%ref_item;
2134         }
2135         close $fd;
2136
2137         return wantarray ? @tagslist : \@tagslist;
2138 }
2139
2140 ## ----------------------------------------------------------------------
2141 ## filesystem-related functions
2142
2143 sub get_file_owner {
2144         my $path = shift;
2145
2146         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2147         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2148         if (!defined $gcos) {
2149                 return undef;
2150         }
2151         my $owner = $gcos;
2152         $owner =~ s/[,;].*$//;
2153         return to_utf8($owner);
2154 }
2155
2156 ## ......................................................................
2157 ## mimetype related functions
2158
2159 sub mimetype_guess_file {
2160         my $filename = shift;
2161         my $mimemap = shift;
2162         -r $mimemap or return undef;
2163
2164         my %mimemap;
2165         open(MIME, $mimemap) or return undef;
2166         while (<MIME>) {
2167                 next if m/^#/; # skip comments
2168                 my ($mime, $exts) = split(/\t+/);
2169                 if (defined $exts) {
2170                         my @exts = split(/\s+/, $exts);
2171                         foreach my $ext (@exts) {
2172                                 $mimemap{$ext} = $mime;
2173                         }
2174                 }
2175         }
2176         close(MIME);
2177
2178         $filename =~ /\.([^.]*)$/;
2179         return $mimemap{$1};
2180 }
2181
2182 sub mimetype_guess {
2183         my $filename = shift;
2184         my $mime;
2185         $filename =~ /\./ or return undef;
2186
2187         if ($mimetypes_file) {
2188                 my $file = $mimetypes_file;
2189                 if ($file !~ m!^/!) { # if it is relative path
2190                         # it is relative to project
2191                         $file = "$projectroot/$project/$file";
2192                 }
2193                 $mime = mimetype_guess_file($filename, $file);
2194         }
2195         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2196         return $mime;
2197 }
2198
2199 sub blob_mimetype {
2200         my $fd = shift;
2201         my $filename = shift;
2202
2203         if ($filename) {
2204                 my $mime = mimetype_guess($filename);
2205                 $mime and return $mime;
2206         }
2207
2208         # just in case
2209         return $default_blob_plain_mimetype unless $fd;
2210
2211         if (-T $fd) {
2212                 return 'text/plain' .
2213                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2214         } elsif (! $filename) {
2215                 return 'application/octet-stream';
2216         } elsif ($filename =~ m/\.png$/i) {
2217                 return 'image/png';
2218         } elsif ($filename =~ m/\.gif$/i) {
2219                 return 'image/gif';
2220         } elsif ($filename =~ m/\.jpe?g$/i) {
2221                 return 'image/jpeg';
2222         } else {
2223                 return 'application/octet-stream';
2224         }
2225 }
2226
2227 ## ======================================================================
2228 ## functions printing HTML: header, footer, error page
2229
2230 sub git_header_html {
2231         my $status = shift || "200 OK";
2232         my $expires = shift;
2233
2234         my $title = "$site_name";
2235         if (defined $project) {
2236                 $title .= " - " . to_utf8($project);
2237                 if (defined $action) {
2238                         $title .= "/$action";
2239                         if (defined $file_name) {
2240                                 $title .= " - " . esc_path($file_name);
2241                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2242                                         $title .= "/";
2243                                 }
2244                         }
2245                 }
2246         }
2247         my $content_type;
2248         # require explicit support from the UA if we are to send the page as
2249         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2250         # we have to do this because MSIE sometimes globs '*/*', pretending to
2251         # support xhtml+xml but choking when it gets what it asked for.
2252         if (defined $cgi->http('HTTP_ACCEPT') &&
2253             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2254             $cgi->Accept('application/xhtml+xml') != 0) {
2255                 $content_type = 'application/xhtml+xml';
2256         } else {
2257                 $content_type = 'text/html';
2258         }
2259         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2260                            -status=> $status, -expires => $expires);
2261         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2262         print <<EOF;
2263 <?xml version="1.0" encoding="utf-8"?>
2264 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2265 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2266 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2267 <!-- git core binaries version $git_version -->
2268 <head>
2269 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2270 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2271 <meta name="robots" content="index, nofollow"/>
2272 <title>$title</title>
2273 EOF
2274 # print out each stylesheet that exist
2275         if (defined $stylesheet) {
2276 #provides backwards capability for those people who define style sheet in a config file
2277                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2278         } else {
2279                 foreach my $stylesheet (@stylesheets) {
2280                         next unless $stylesheet;
2281                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2282                 }
2283         }
2284         if (defined $project) {
2285                 printf('<link rel="alternate" title="%s log RSS feed" '.
2286                        'href="%s" type="application/rss+xml" />'."\n",
2287                        esc_param($project), href(action=>"rss"));
2288                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2289                        'href="%s" type="application/rss+xml" />'."\n",
2290                        esc_param($project), href(action=>"rss",
2291                                                  extra_options=>"--no-merges"));
2292                 printf('<link rel="alternate" title="%s log Atom feed" '.
2293                        'href="%s" type="application/atom+xml" />'."\n",
2294                        esc_param($project), href(action=>"atom"));
2295                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2296                        'href="%s" type="application/atom+xml" />'."\n",
2297                        esc_param($project), href(action=>"atom",
2298                                                  extra_options=>"--no-merges"));
2299         } else {
2300                 printf('<link rel="alternate" title="%s projects list" '.
2301                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2302                        $site_name, href(project=>undef, action=>"project_index"));
2303                 printf('<link rel="alternate" title="%s projects feeds" '.
2304                        'href="%s" type="text/x-opml"/>'."\n",
2305                        $site_name, href(project=>undef, action=>"opml"));
2306         }
2307         if (defined $favicon) {
2308                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2309         }
2310
2311         print "</head>\n" .
2312               "<body>\n";
2313
2314         if (-f $site_header) {
2315                 open (my $fd, $site_header);
2316                 print <$fd>;
2317                 close $fd;
2318         }
2319
2320         print "<div class=\"page_header\">\n" .
2321               $cgi->a({-href => esc_url($logo_url),
2322                        -title => $logo_label},
2323                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2324         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2325         if (defined $project) {
2326                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2327                 if (defined $action) {
2328                         print " / $action";
2329                 }
2330                 print "\n";
2331         }
2332         print "</div>\n";
2333
2334         my ($have_search) = gitweb_check_feature('search');
2335         if ((defined $project) && ($have_search)) {
2336                 if (!defined $searchtext) {
2337                         $searchtext = "";
2338                 }
2339                 my $search_hash;
2340                 if (defined $hash_base) {
2341                         $search_hash = $hash_base;
2342                 } elsif (defined $hash) {
2343                         $search_hash = $hash;
2344                 } else {
2345                         $search_hash = "HEAD";
2346                 }
2347                 my $action = $my_uri;
2348                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2349                 if ($use_pathinfo) {
2350                         $action .= "/$project";
2351                 } else {
2352                         $cgi->param("p", $project);
2353                 }
2354                 $cgi->param("a", "search");
2355                 $cgi->param("h", $search_hash);
2356                 print $cgi->startform(-method => "get", -action => $action) .
2357                       "<div class=\"search\">\n" .
2358                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2359                       $cgi->hidden(-name => "a") . "\n" .
2360                       $cgi->hidden(-name => "h") . "\n" .
2361                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2362                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2363                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2364                       " search:\n",
2365                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2366                       "</div>" .
2367                       $cgi->end_form() . "\n";
2368         }
2369 }
2370
2371 sub git_footer_html {
2372         print "<div class=\"page_footer\">\n";
2373         if (defined $project) {
2374                 my $descr = git_get_project_description($project);
2375                 if (defined $descr) {
2376                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2377                 }
2378                 print $cgi->a({-href => href(action=>"rss"),
2379                               -class => "rss_logo"}, "RSS") . " ";
2380                 print $cgi->a({-href => href(action=>"atom"),
2381                               -class => "rss_logo"}, "Atom") . "\n";
2382         } else {
2383                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2384                               -class => "rss_logo"}, "OPML") . " ";
2385                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2386                               -class => "rss_logo"}, "TXT") . "\n";
2387         }
2388         print "</div>\n" ;
2389
2390         if (-f $site_footer) {
2391                 open (my $fd, $site_footer);
2392                 print <$fd>;
2393                 close $fd;
2394         }
2395
2396         print "</body>\n" .
2397               "</html>";
2398 }
2399
2400 sub die_error {
2401         my $status = shift || "403 Forbidden";
2402         my $error = shift || "Malformed query, file missing or permission denied";
2403
2404         git_header_html($status);
2405         print <<EOF;
2406 <div class="page_body">
2407 <br /><br />
2408 $status - $error
2409 <br />
2410 </div>
2411 EOF
2412         git_footer_html();
2413         exit;
2414 }
2415
2416 ## ----------------------------------------------------------------------
2417 ## functions printing or outputting HTML: navigation
2418
2419 sub git_print_page_nav {
2420         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2421         $extra = '' if !defined $extra; # pager or formats
2422
2423         my @navs = qw(summary shortlog log commit commitdiff tree);
2424         if ($suppress) {
2425                 @navs = grep { $_ ne $suppress } @navs;
2426         }
2427
2428         my %arg = map { $_ => {action=>$_} } @navs;
2429         if (defined $head) {
2430                 for (qw(commit commitdiff)) {
2431                         $arg{$_}{'hash'} = $head;
2432                 }
2433                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2434                         for (qw(shortlog log)) {
2435                                 $arg{$_}{'hash'} = $head;
2436                         }
2437                 }
2438         }
2439         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2440         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2441
2442         print "<div class=\"page_nav\">\n" .
2443                 (join " | ",
2444                  map { $_ eq $current ?
2445                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2446                  } @navs);
2447         print "<br/>\n$extra<br/>\n" .
2448               "</div>\n";
2449 }
2450
2451 sub format_paging_nav {
2452         my ($action, $hash, $head, $page, $nrevs) = @_;
2453         my $paging_nav;
2454
2455
2456         if ($hash ne $head || $page) {
2457                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2458         } else {
2459                 $paging_nav .= "HEAD";
2460         }
2461
2462         if ($page > 0) {
2463                 $paging_nav .= " &sdot; " .
2464                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
2465                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2466         } else {
2467                 $paging_nav .= " &sdot; prev";
2468         }
2469
2470         if ($nrevs >= (100 * ($page+1)-1)) {
2471                 $paging_nav .= " &sdot; " .
2472                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
2473                                  -accesskey => "n", -title => "Alt-n"}, "next");
2474         } else {
2475                 $paging_nav .= " &sdot; next";
2476         }
2477
2478         return $paging_nav;
2479 }
2480
2481 ## ......................................................................
2482 ## functions printing or outputting HTML: div
2483
2484 sub git_print_header_div {
2485         my ($action, $title, $hash, $hash_base) = @_;
2486         my %args = ();
2487
2488         $args{'action'} = $action;
2489         $args{'hash'} = $hash if $hash;
2490         $args{'hash_base'} = $hash_base if $hash_base;
2491
2492         print "<div class=\"header\">\n" .
2493               $cgi->a({-href => href(%args), -class => "title"},
2494               $title ? $title : $action) .
2495               "\n</div>\n";
2496 }
2497
2498 #sub git_print_authorship (\%) {
2499 sub git_print_authorship {
2500         my $co = shift;
2501
2502         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2503         print "<div class=\"author_date\">" .
2504               esc_html($co->{'author_name'}) .
2505               " [$ad{'rfc2822'}";
2506         if ($ad{'hour_local'} < 6) {
2507                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2508                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2509         } else {
2510                 printf(" (%02d:%02d %s)",
2511                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2512         }
2513         print "]</div>\n";
2514 }
2515
2516 sub git_print_page_path {
2517         my $name = shift;
2518         my $type = shift;
2519         my $hb = shift;
2520
2521
2522         print "<div class=\"page_path\">";
2523         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2524                       -title => 'tree root'}, to_utf8("[$project]"));
2525         print " / ";
2526         if (defined $name) {
2527                 my @dirname = split '/', $name;
2528                 my $basename = pop @dirname;
2529                 my $fullname = '';
2530
2531                 foreach my $dir (@dirname) {
2532                         $fullname .= ($fullname ? '/' : '') . $dir;
2533                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2534                                                      hash_base=>$hb),
2535                                       -title => $fullname}, esc_path($dir));
2536                         print " / ";
2537                 }
2538                 if (defined $type && $type eq 'blob') {
2539                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2540                                                      hash_base=>$hb),
2541                                       -title => $name}, esc_path($basename));
2542                 } elsif (defined $type && $type eq 'tree') {
2543                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2544                                                      hash_base=>$hb),
2545                                       -title => $name}, esc_path($basename));
2546                         print " / ";
2547                 } else {
2548                         print esc_path($basename);
2549                 }
2550         }
2551         print "<br/></div>\n";
2552 }
2553
2554 # sub git_print_log (\@;%) {
2555 sub git_print_log ($;%) {
2556         my $log = shift;
2557         my %opts = @_;
2558
2559         if ($opts{'-remove_title'}) {
2560                 # remove title, i.e. first line of log
2561                 shift @$log;
2562         }
2563         # remove leading empty lines
2564         while (defined $log->[0] && $log->[0] eq "") {
2565                 shift @$log;
2566         }
2567
2568         # print log
2569         my $signoff = 0;
2570         my $empty = 0;
2571         foreach my $line (@$log) {
2572                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2573                         $signoff = 1;
2574                         $empty = 0;
2575                         if (! $opts{'-remove_signoff'}) {
2576                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2577                                 next;
2578                         } else {
2579                                 # remove signoff lines
2580                                 next;
2581                         }
2582                 } else {
2583                         $signoff = 0;
2584                 }
2585
2586                 # print only one empty line
2587                 # do not print empty line after signoff
2588                 if ($line eq "") {
2589                         next if ($empty || $signoff);
2590                         $empty = 1;
2591                 } else {
2592                         $empty = 0;
2593                 }
2594
2595                 print format_log_line_html($line) . "<br/>\n";
2596         }
2597
2598         if ($opts{'-final_empty_line'}) {
2599                 # end with single empty line
2600                 print "<br/>\n" unless $empty;
2601         }
2602 }
2603
2604 # return link target (what link points to)
2605 sub git_get_link_target {
2606         my $hash = shift;
2607         my $link_target;
2608
2609         # read link
2610         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2611                 or return;
2612         {
2613                 local $/;
2614                 $link_target = <$fd>;
2615         }
2616         close $fd
2617                 or return;
2618
2619         return $link_target;
2620 }
2621
2622 # given link target, and the directory (basedir) the link is in,
2623 # return target of link relative to top directory (top tree);
2624 # return undef if it is not possible (including absolute links).
2625 sub normalize_link_target {
2626         my ($link_target, $basedir, $hash_base) = @_;
2627
2628         # we can normalize symlink target only if $hash_base is provided
2629         return unless $hash_base;
2630
2631         # absolute symlinks (beginning with '/') cannot be normalized
2632         return if (substr($link_target, 0, 1) eq '/');
2633
2634         # normalize link target to path from top (root) tree (dir)
2635         my $path;
2636         if ($basedir) {
2637                 $path = $basedir . '/' . $link_target;
2638         } else {
2639                 # we are in top (root) tree (dir)
2640                 $path = $link_target;
2641         }
2642
2643         # remove //, /./, and /../
2644         my @path_parts;
2645         foreach my $part (split('/', $path)) {
2646                 # discard '.' and ''
2647                 next if (!$part || $part eq '.');
2648                 # handle '..'
2649                 if ($part eq '..') {
2650                         if (@path_parts) {
2651                                 pop @path_parts;
2652                         } else {
2653                                 # link leads outside repository (outside top dir)
2654                                 return;
2655                         }
2656                 } else {
2657                         push @path_parts, $part;
2658                 }
2659         }
2660         $path = join('/', @path_parts);
2661
2662         return $path;
2663 }
2664
2665 # print tree entry (row of git_tree), but without encompassing <tr> element
2666 sub git_print_tree_entry {
2667         my ($t, $basedir, $hash_base, $have_blame) = @_;
2668
2669         my %base_key = ();
2670         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2671
2672         # The format of a table row is: mode list link.  Where mode is
2673         # the mode of the entry, list is the name of the entry, an href,
2674         # and link is the action links of the entry.
2675
2676         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2677         if ($t->{'type'} eq "blob") {
2678                 print "<td class=\"list\">" .
2679                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2680                                                file_name=>"$basedir$t->{'name'}", %base_key),
2681                                 -class => "list"}, esc_path($t->{'name'}));
2682                 if (S_ISLNK(oct $t->{'mode'})) {
2683                         my $link_target = git_get_link_target($t->{'hash'});
2684                         if ($link_target) {
2685                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2686                                 if (defined $norm_target) {
2687                                         print " -> " .
2688                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2689                                                                      file_name=>$norm_target),
2690                                                        -title => $norm_target}, esc_path($link_target));
2691                                 } else {
2692                                         print " -> " . esc_path($link_target);
2693                                 }
2694                         }
2695                 }
2696                 print "</td>\n";
2697                 print "<td class=\"link\">";
2698                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2699                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2700                               "blob");
2701                 if ($have_blame) {
2702                         print " | " .
2703                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2704                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2705                                       "blame");
2706                 }
2707                 if (defined $hash_base) {
2708                         print " | " .
2709                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2710                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2711                                       "history");
2712                 }
2713                 print " | " .
2714                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2715                                                file_name=>"$basedir$t->{'name'}")},
2716                                 "raw");
2717                 print "</td>\n";
2718
2719         } elsif ($t->{'type'} eq "tree") {
2720                 print "<td class=\"list\">";
2721                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2722                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2723                               esc_path($t->{'name'}));
2724                 print "</td>\n";
2725                 print "<td class=\"link\">";
2726                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2727                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2728                               "tree");
2729                 if (defined $hash_base) {
2730                         print " | " .
2731                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2732                                                      file_name=>"$basedir$t->{'name'}")},
2733                                       "history");
2734                 }
2735                 print "</td>\n";
2736         } else {
2737                 # unknown object: we can only present history for it
2738                 # (this includes 'commit' object, i.e. submodule support)
2739                 print "<td class=\"list\">" .
2740                       esc_path($t->{'name'}) .
2741                       "</td>\n";
2742                 print "<td class=\"link\">";
2743                 if (defined $hash_base) {
2744                         print $cgi->a({-href => href(action=>"history",
2745                                                      hash_base=>$hash_base,
2746                                                      file_name=>"$basedir$t->{'name'}")},
2747                                       "history");
2748                 }
2749                 print "</td>\n";
2750         }
2751 }
2752
2753 ## ......................................................................
2754 ## functions printing large fragments of HTML
2755
2756 sub fill_from_file_info {
2757         my ($diff, @parents) = @_;
2758
2759         $diff->{'from_file'} = [ ];
2760         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2761         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2762                 if ($diff->{'status'}[$i] eq 'R' ||
2763                     $diff->{'status'}[$i] eq 'C') {
2764                         $diff->{'from_file'}[$i] =
2765                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2766                 }
2767         }
2768
2769         return $diff;
2770 }
2771
2772 # parameters can be strings, or references to arrays of strings
2773 sub from_ids_eq {
2774         my ($a, $b) = @_;
2775
2776         if (ref($a) eq "ARRAY" && ref($b) eq "ARRAY" && @$a == @$b) {
2777                 for (my $i = 0; $i < @$a; ++$i) {
2778                         return 0 unless ($a->[$i] eq $b->[$i]);
2779                 }
2780                 return 1;
2781         } elsif (!ref($a) && !ref($b)) {
2782                 return $a eq $b;
2783         } else {
2784                 return 0;
2785         }
2786 }
2787
2788 sub is_deleted {
2789         my $diffinfo = shift;
2790
2791         return $diffinfo->{'to_id'} eq ('0' x 40);
2792 }
2793
2794 sub git_difftree_body {
2795         my ($difftree, $hash, @parents) = @_;
2796         my ($parent) = $parents[0];
2797         my ($have_blame) = gitweb_check_feature('blame');
2798         print "<div class=\"list_head\">\n";
2799         if ($#{$difftree} > 10) {
2800                 print(($#{$difftree} + 1) . " files changed:\n");
2801         }
2802         print "</div>\n";
2803
2804         print "<table class=\"" .
2805               (@parents > 1 ? "combined " : "") .
2806               "diff_tree\">\n";
2807
2808         # header only for combined diff in 'commitdiff' view
2809         my $has_header = @parents > 1 && $action eq 'commitdiff';
2810         if ($has_header) {
2811                 # table header
2812                 print "<thead><tr>\n" .
2813                        "<th></th><th></th>\n"; # filename, patchN link
2814                 for (my $i = 0; $i < @parents; $i++) {
2815                         my $par = $parents[$i];
2816                         print "<th>" .
2817                               $cgi->a({-href => href(action=>"commitdiff",
2818                                                      hash=>$hash, hash_parent=>$par),
2819                                        -title => 'commitdiff to parent number ' .
2820                                                   ($i+1) . ': ' . substr($par,0,7)},
2821                                       $i+1) .
2822                               "&nbsp;</th>\n";
2823                 }
2824                 print "</tr></thead>\n<tbody>\n";
2825         }
2826
2827         my $alternate = 1;
2828         my $patchno = 0;
2829         foreach my $line (@{$difftree}) {
2830                 my $diff;
2831                 if (ref($line) eq "HASH") {
2832                         # pre-parsed (or generated by hand)
2833                         $diff = $line;
2834                 } else {
2835                         $diff = parse_difftree_raw_line($line);
2836                 }
2837
2838                 if ($alternate) {
2839                         print "<tr class=\"dark\">\n";
2840                 } else {
2841                         print "<tr class=\"light\">\n";
2842                 }
2843                 $alternate ^= 1;
2844
2845                 if (exists $diff->{'nparents'}) { # combined diff
2846
2847                         fill_from_file_info($diff, @parents)
2848                                 unless exists $diff->{'from_file'};
2849
2850                         if (!is_deleted($diff)) {
2851                                 # file exists in the result (child) commit
2852                                 print "<td>" .
2853                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2854                                                              file_name=>$diff->{'to_file'},
2855                                                              hash_base=>$hash),
2856                                               -class => "list"}, esc_path($diff->{'to_file'})) .
2857                                       "</td>\n";
2858                         } else {
2859                                 print "<td>" .
2860                                       esc_path($diff->{'to_file'}) .
2861                                       "</td>\n";
2862                         }
2863
2864                         if ($action eq 'commitdiff') {
2865                                 # link to patch
2866                                 $patchno++;
2867                                 print "<td class=\"link\">" .
2868                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
2869                                       " | " .
2870                                       "</td>\n";
2871                         }
2872
2873                         my $has_history = 0;
2874                         my $not_deleted = 0;
2875                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2876                                 my $hash_parent = $parents[$i];
2877                                 my $from_hash = $diff->{'from_id'}[$i];
2878                                 my $from_path = $diff->{'from_file'}[$i];
2879                                 my $status = $diff->{'status'}[$i];
2880
2881                                 $has_history ||= ($status ne 'A');
2882                                 $not_deleted ||= ($status ne 'D');
2883
2884                                 if ($status eq 'A') {
2885                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
2886                                 } elsif ($status eq 'D') {
2887                                         print "<td class=\"link\">" .
2888                                               $cgi->a({-href => href(action=>"blob",
2889                                                                      hash_base=>$hash,
2890                                                                      hash=>$from_hash,
2891                                                                      file_name=>$from_path)},
2892                                                       "blob" . ($i+1)) .
2893                                               " | </td>\n";
2894                                 } else {
2895                                         if ($diff->{'to_id'} eq $from_hash) {
2896                                                 print "<td class=\"link nochange\">";
2897                                         } else {
2898                                                 print "<td class=\"link\">";
2899                                         }
2900                                         print $cgi->a({-href => href(action=>"blobdiff",
2901                                                                      hash=>$diff->{'to_id'},
2902                                                                      hash_parent=>$from_hash,
2903                                                                      hash_base=>$hash,
2904                                                                      hash_parent_base=>$hash_parent,
2905                                                                      file_name=>$diff->{'to_file'},
2906                                                                      file_parent=>$from_path)},
2907                                                       "diff" . ($i+1)) .
2908                                               " | </td>\n";
2909                                 }
2910                         }
2911
2912                         print "<td class=\"link\">";
2913                         if ($not_deleted) {
2914                                 print $cgi->a({-href => href(action=>"blob",
2915                                                              hash=>$diff->{'to_id'},
2916                                                              file_name=>$diff->{'to_file'},
2917                                                              hash_base=>$hash)},
2918                                               "blob");
2919                                 print " | " if ($has_history);
2920                         }
2921                         if ($has_history) {
2922                                 print $cgi->a({-href => href(action=>"history",
2923                                                              file_name=>$diff->{'to_file'},
2924                                                              hash_base=>$hash)},
2925                                               "history");
2926                         }
2927                         print "</td>\n";
2928
2929                         print "</tr>\n";
2930                         next; # instead of 'else' clause, to avoid extra indent
2931                 }
2932                 # else ordinary diff
2933
2934                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2935                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2936                 if ($diff->{'to_mode'} ne ('0' x 6)) {
2937                         $to_mode_oct = oct $diff->{'to_mode'};
2938                         if (S_ISREG($to_mode_oct)) { # only for regular file
2939                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2940                         }
2941                         $to_file_type = file_type($diff->{'to_mode'});
2942                 }
2943                 if ($diff->{'from_mode'} ne ('0' x 6)) {
2944                         $from_mode_oct = oct $diff->{'from_mode'};
2945                         if (S_ISREG($to_mode_oct)) { # only for regular file
2946                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2947                         }
2948                         $from_file_type = file_type($diff->{'from_mode'});
2949                 }
2950
2951                 if ($diff->{'status'} eq "A") { # created
2952                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2953                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2954                         $mode_chng   .= "]</span>";
2955                         print "<td>";
2956                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2957                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
2958                                       -class => "list"}, esc_path($diff->{'file'}));
2959                         print "</td>\n";
2960                         print "<td>$mode_chng</td>\n";
2961                         print "<td class=\"link\">";
2962                         if ($action eq 'commitdiff') {
2963                                 # link to patch
2964                                 $patchno++;
2965                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2966                                 print " | ";
2967                         }
2968                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
2969                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
2970                                       "blob");
2971                         print "</td>\n";
2972
2973                 } elsif ($diff->{'status'} eq "D") { # deleted
2974                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2975                         print "<td>";
2976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2977                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
2978                                        -class => "list"}, esc_path($diff->{'file'}));
2979                         print "</td>\n";
2980                         print "<td>$mode_chng</td>\n";
2981                         print "<td class=\"link\">";
2982                         if ($action eq 'commitdiff') {
2983                                 # link to patch
2984                                 $patchno++;
2985                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2986                                 print " | ";
2987                         }
2988                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
2989                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
2990                                       "blob") . " | ";
2991                         if ($have_blame) {
2992                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2993                                                              file_name=>$diff->{'file'})},
2994                                               "blame") . " | ";
2995                         }
2996                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
2997                                                      file_name=>$diff->{'file'})},
2998                                       "history");
2999                         print "</td>\n";
3000
3001                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3002                         my $mode_chnge = "";
3003                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3004                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3005                                 if ($from_file_type ne $to_file_type) {
3006                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3007                                 }
3008                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3009                                         if ($from_mode_str && $to_mode_str) {
3010                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3011                                         } elsif ($to_mode_str) {
3012                                                 $mode_chnge .= " mode: $to_mode_str";
3013                                         }
3014                                 }
3015                                 $mode_chnge .= "]</span>\n";
3016                         }
3017                         print "<td>";
3018                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3019                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3020                                       -class => "list"}, esc_path($diff->{'file'}));
3021                         print "</td>\n";
3022                         print "<td>$mode_chnge</td>\n";
3023                         print "<td class=\"link\">";
3024                         if ($action eq 'commitdiff') {
3025                                 # link to patch
3026                                 $patchno++;
3027                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3028                                       " | ";
3029                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3030                                 # "commit" view and modified file (not onlu mode changed)
3031                                 print $cgi->a({-href => href(action=>"blobdiff",
3032                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3033                                                              hash_base=>$hash, hash_parent_base=>$parent,
3034                                                              file_name=>$diff->{'file'})},
3035                                               "diff") .
3036                                       " | ";
3037                         }
3038                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3039                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3040                                        "blob") . " | ";
3041                         if ($have_blame) {
3042                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3043                                                              file_name=>$diff->{'file'})},
3044                                               "blame") . " | ";
3045                         }
3046                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3047                                                      file_name=>$diff->{'file'})},
3048                                       "history");
3049                         print "</td>\n";
3050
3051                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3052                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3053                         my $nstatus = $status_name{$diff->{'status'}};
3054                         my $mode_chng = "";
3055                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3056                                 # mode also for directories, so we cannot use $to_mode_str
3057                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3058                         }
3059                         print "<td>" .
3060                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3061                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3062                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3063                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3064                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3065                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3066                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3067                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3068                               "<td class=\"link\">";
3069                         if ($action eq 'commitdiff') {
3070                                 # link to patch
3071                                 $patchno++;
3072                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3073                                       " | ";
3074                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3075                                 # "commit" view and modified file (not only pure rename or copy)
3076                                 print $cgi->a({-href => href(action=>"blobdiff",
3077                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3078                                                              hash_base=>$hash, hash_parent_base=>$parent,
3079                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3080                                               "diff") .
3081                                       " | ";
3082                         }
3083                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3084                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3085                                       "blob") . " | ";
3086                         if ($have_blame) {
3087                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3088                                                              file_name=>$diff->{'to_file'})},
3089                                               "blame") . " | ";
3090                         }
3091                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3092                                                     file_name=>$diff->{'to_file'})},
3093                                       "history");
3094                         print "</td>\n";
3095
3096                 } # we should not encounter Unmerged (U) or Unknown (X) status
3097                 print "</tr>\n";
3098         }
3099         print "</tbody>" if $has_header;
3100         print "</table>\n";
3101 }
3102
3103 sub git_patchset_body {
3104         my ($fd, $difftree, $hash, @hash_parents) = @_;
3105         my ($hash_parent) = $hash_parents[0];
3106
3107         my $patch_idx = 0;
3108         my $patch_number = 0;
3109         my $patch_line;
3110         my $diffinfo;
3111         my (%from, %to);
3112
3113         print "<div class=\"patchset\">\n";
3114
3115         # skip to first patch
3116         while ($patch_line = <$fd>) {
3117                 chomp $patch_line;
3118
3119                 last if ($patch_line =~ m/^diff /);
3120         }
3121
3122  PATCH:
3123         while ($patch_line) {
3124                 my @diff_header;
3125                 my ($from_id, $to_id);
3126
3127                 # git diff header
3128                 #assert($patch_line =~ m/^diff /) if DEBUG;
3129                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3130                 $patch_number++;
3131                 push @diff_header, $patch_line;
3132
3133                 # extended diff header
3134         EXTENDED_HEADER:
3135                 while ($patch_line = <$fd>) {
3136                         chomp $patch_line;
3137
3138                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3139
3140                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3141                                 $from_id = $1;
3142                                 $to_id   = $2;
3143                         } elsif ($patch_line =~ m/^index ((?:[0-9a-fA-F]{40},)+[0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
3144                                 $from_id = [ split(',', $1) ];
3145                                 $to_id   = $2;
3146                         }
3147
3148                         push @diff_header, $patch_line;
3149                 }
3150                 my $last_patch_line = $patch_line;
3151
3152                 # check if current patch belong to current raw line
3153                 # and parse raw git-diff line if needed
3154                 if (defined $diffinfo &&
3155                     defined $from_id && defined $to_id &&
3156                     from_ids_eq($diffinfo->{'from_id'}, $from_id) &&
3157                     $diffinfo->{'to_id'} eq $to_id) {
3158                         # this is continuation of a split patch
3159                         print "<div class=\"patch cont\">\n";
3160                 } else {
3161                         # advance raw git-diff output if needed
3162                         $patch_idx++ if defined $diffinfo;
3163
3164                         # compact combined diff output can have some patches skipped
3165                         # find which patch (using pathname of result) we are at now
3166                         my $to_name;
3167                         if ($diff_header[0] =~ m!^diff --cc "?(.*)"?$!) {
3168                                 $to_name = $1;
3169                         }
3170
3171                         do {
3172                                 # read and prepare patch information
3173                                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3174                                         # pre-parsed (or generated by hand)
3175                                         $diffinfo = $difftree->[$patch_idx];
3176                                 } else {
3177                                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3178                                 }
3179
3180                                 # check if current raw line has no patch (it got simplified)
3181                                 if (defined $to_name && $to_name ne $diffinfo->{'to_file'}) {
3182                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3183                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3184                                               "</div>\n";  # class="patch"
3185
3186                                         $patch_idx++;
3187                                         $patch_number++;
3188                                 }
3189                         } until (!defined $to_name || $to_name eq $diffinfo->{'to_file'} ||
3190                                  $patch_idx > $#$difftree);
3191                         # modifies %from, %to hashes
3192                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3193                         if ($diffinfo->{'nparents'}) {
3194                                 # combined diff
3195                                 $from{'file'} = [];
3196                                 $from{'href'} = [];
3197                                 fill_from_file_info($diffinfo, @hash_parents)
3198                                         unless exists $diffinfo->{'from_file'};
3199                                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3200                                         $from{'file'}[$i] = $diffinfo->{'from_file'}[$i] || $diffinfo->{'to_file'};
3201                                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3202                                                 $from{'href'}[$i] = href(action=>"blob",
3203                                                                          hash_base=>$hash_parents[$i],
3204                                                                          hash=>$diffinfo->{'from_id'}[$i],
3205                                                                          file_name=>$from{'file'}[$i]);
3206                                         } else {
3207                                                 $from{'href'}[$i] = undef;
3208                                         }
3209                                 }
3210                         } else {
3211                                 $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
3212                                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3213                                         $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3214                                                              hash=>$diffinfo->{'from_id'},
3215                                                              file_name=>$from{'file'});
3216                                 } else {
3217                                         delete $from{'href'};
3218                                 }
3219                         }
3220
3221                         $to{'file'} = $diffinfo->{'to_file'} || $diffinfo->{'file'};
3222                         if (!is_deleted($diffinfo)) { # file exists in result
3223                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
3224                                                    hash=>$diffinfo->{'to_id'},
3225                                                    file_name=>$to{'file'});
3226                         } else {
3227                                 delete $to{'href'};
3228                         }
3229                         # this is first patch for raw difftree line with $patch_idx index
3230                         # we index @$difftree array from 0, but number patches from 1
3231                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3232                 }
3233
3234                 # print "git diff" header
3235                 $patch_line = shift @diff_header;
3236                 print format_git_diff_header_line($patch_line, $diffinfo,
3237                                                   \%from, \%to);
3238
3239                 # print extended diff header
3240                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
3241         EXTENDED_HEADER:
3242                 foreach $patch_line (@diff_header) {
3243                         print format_extended_diff_header_line($patch_line, $diffinfo,
3244                                                                \%from, \%to);
3245                 }
3246                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
3247
3248                 # from-file/to-file diff header
3249                 $patch_line = $last_patch_line;
3250                 if (! $patch_line) {
3251                         print "</div>\n"; # class="patch"
3252                         last PATCH;
3253                 }
3254                 next PATCH if ($patch_line =~ m/^diff /);
3255                 #assert($patch_line =~ m/^---/) if DEBUG;
3256                 #assert($patch_line eq $last_patch_line) if DEBUG;
3257
3258                 $patch_line = <$fd>;
3259                 chomp $patch_line;
3260                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3261
3262                 print format_diff_from_to_header($last_patch_line, $patch_line,
3263                                                  $diffinfo, \%from, \%to,
3264                                                  @hash_parents);
3265
3266                 # the patch itself
3267         LINE:
3268                 while ($patch_line = <$fd>) {
3269                         chomp $patch_line;
3270
3271                         next PATCH if ($patch_line =~ m/^diff /);
3272
3273                         print format_diff_line($patch_line, \%from, \%to);
3274                 }
3275
3276         } continue {
3277                 print "</div>\n"; # class="patch"
3278         }
3279
3280         # for compact combined (--cc) format, with chunk and patch simpliciaction
3281         # patchset might be empty, but there might be unprocessed raw lines
3282         for ($patch_idx++ if $patch_number > 0;
3283              $patch_idx < @$difftree;
3284              $patch_idx++) {
3285                 # read and prepare patch information
3286                 if (ref($difftree->[$patch_idx]) eq "HASH") {
3287                         # pre-parsed (or generated by hand)
3288                         $diffinfo = $difftree->[$patch_idx];
3289                 } else {
3290                         $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
3291                 }
3292
3293                 # generate anchor for "patch" links in difftree / whatchanged part
3294                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3295                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3296                       "</div>\n";  # class="patch"
3297
3298                 $patch_number++;
3299         }
3300
3301         if ($patch_number == 0) {
3302                 if (@hash_parents > 1) {
3303                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3304                 } else {
3305                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3306                 }
3307         }
3308
3309         print "</div>\n"; # class="patchset"
3310 }
3311
3312 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3313
3314 sub git_project_list_body {
3315         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3316
3317         my ($check_forks) = gitweb_check_feature('forks');
3318
3319         my @projects;
3320         foreach my $pr (@$projlist) {
3321                 my (@aa) = git_get_last_activity($pr->{'path'});
3322                 unless (@aa) {
3323                         next;
3324                 }
3325                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3326                 if (!defined $pr->{'descr'}) {
3327                         my $descr = git_get_project_description($pr->{'path'}) || "";
3328                         $pr->{'descr_long'} = to_utf8($descr);
3329                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3330                 }
3331                 if (!defined $pr->{'owner'}) {
3332                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3333                 }
3334                 if ($check_forks) {
3335                         my $pname = $pr->{'path'};
3336                         if (($pname =~ s/\.git$//) &&
3337                             ($pname !~ /\/$/) &&
3338                             (-d "$projectroot/$pname")) {
3339                                 $pr->{'forks'} = "-d $projectroot/$pname";
3340                         }
3341                         else {
3342                                 $pr->{'forks'} = 0;
3343                         }
3344                 }
3345                 push @projects, $pr;
3346         }
3347
3348         $order ||= $default_projects_order;
3349         $from = 0 unless defined $from;
3350         $to = $#projects if (!defined $to || $#projects < $to);
3351
3352         print "<table class=\"project_list\">\n";
3353         unless ($no_header) {
3354                 print "<tr>\n";
3355                 if ($check_forks) {
3356                         print "<th></th>\n";
3357                 }
3358                 if ($order eq "project") {
3359                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3360                         print "<th>Project</th>\n";
3361                 } else {
3362                         print "<th>" .
3363                               $cgi->a({-href => href(project=>undef, order=>'project'),
3364                                        -class => "header"}, "Project") .
3365                               "</th>\n";
3366                 }
3367                 if ($order eq "descr") {
3368                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3369                         print "<th>Description</th>\n";
3370                 } else {
3371                         print "<th>" .
3372                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3373                                        -class => "header"}, "Description") .
3374                               "</th>\n";
3375                 }
3376                 if ($order eq "owner") {
3377                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3378                         print "<th>Owner</th>\n";
3379                 } else {
3380                         print "<th>" .
3381                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3382                                        -class => "header"}, "Owner") .
3383                               "</th>\n";
3384                 }
3385                 if ($order eq "age") {
3386                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3387                         print "<th>Last Change</th>\n";
3388                 } else {
3389                         print "<th>" .
3390                               $cgi->a({-href => href(project=>undef, order=>'age'),
3391                                        -class => "header"}, "Last Change") .
3392                               "</th>\n";
3393                 }
3394                 print "<th></th>\n" .
3395                       "</tr>\n";
3396         }
3397         my $alternate = 1;
3398         for (my $i = $from; $i <= $to; $i++) {
3399                 my $pr = $projects[$i];
3400                 if ($alternate) {
3401                         print "<tr class=\"dark\">\n";
3402                 } else {
3403                         print "<tr class=\"light\">\n";
3404                 }
3405                 $alternate ^= 1;
3406                 if ($check_forks) {
3407                         print "<td>";
3408                         if ($pr->{'forks'}) {
3409                                 print "<!-- $pr->{'forks'} -->\n";
3410                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3411                         }
3412                         print "</td>\n";
3413                 }
3414                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3415                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3416                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3417                                         -class => "list", -title => $pr->{'descr_long'}},
3418                                         esc_html($pr->{'descr'})) . "</td>\n" .
3419                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
3420                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3421                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3422                       "<td class=\"link\">" .
3423                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3424                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3425                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3426                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3427                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3428                       "</td>\n" .
3429                       "</tr>\n";
3430         }
3431         if (defined $extra) {
3432                 print "<tr>\n";
3433                 if ($check_forks) {
3434                         print "<td></td>\n";
3435                 }
3436                 print "<td colspan=\"5\">$extra</td>\n" .
3437                       "</tr>\n";
3438         }
3439         print "</table>\n";
3440 }
3441
3442 sub git_shortlog_body {
3443         # uses global variable $project
3444         my ($commitlist, $from, $to, $refs, $extra) = @_;
3445
3446         $from = 0 unless defined $from;
3447         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3448
3449         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
3450         my $alternate = 1;
3451         for (my $i = $from; $i <= $to; $i++) {
3452                 my %co = %{$commitlist->[$i]};
3453                 my $commit = $co{'id'};
3454                 my $ref = format_ref_marker($refs, $commit);
3455                 if ($alternate) {
3456                         print "<tr class=\"dark\">\n";
3457                 } else {
3458                         print "<tr class=\"light\">\n";
3459                 }
3460                 $alternate ^= 1;
3461                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3462                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3463                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
3464                       "<td>";
3465                 print format_subject_html($co{'title'}, $co{'title_short'},
3466                                           href(action=>"commit", hash=>$commit), $ref);
3467                 print "</td>\n" .
3468                       "<td class=\"link\">" .
3469                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3470                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3471                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3472                 my $snapshot_links = format_snapshot_links($commit);
3473                 if (defined $snapshot_links) {
3474                         print " | " . $snapshot_links;
3475                 }
3476                 print "</td>\n" .
3477                       "</tr>\n";
3478         }
3479         if (defined $extra) {
3480                 print "<tr>\n" .
3481                       "<td colspan=\"4\">$extra</td>\n" .
3482                       "</tr>\n";
3483         }
3484         print "</table>\n";
3485 }
3486
3487 sub git_history_body {
3488         # Warning: assumes constant type (blob or tree) during history
3489         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3490
3491         $from = 0 unless defined $from;
3492         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3493
3494         print "<table class=\"history\" cellspacing=\"0\">\n";
3495         my $alternate = 1;
3496         for (my $i = $from; $i <= $to; $i++) {
3497                 my %co = %{$commitlist->[$i]};
3498                 if (!%co) {
3499                         next;
3500                 }
3501                 my $commit = $co{'id'};
3502
3503                 my $ref = format_ref_marker($refs, $commit);
3504
3505                 if ($alternate) {
3506                         print "<tr class=\"dark\">\n";
3507                 } else {
3508                         print "<tr class=\"light\">\n";
3509                 }
3510                 $alternate ^= 1;
3511                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3512                       # shortlog uses      chop_str($co{'author_name'}, 10)
3513                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
3514                       "<td>";
3515                 # originally git_history used chop_str($co{'title'}, 50)
3516                 print format_subject_html($co{'title'}, $co{'title_short'},
3517                                           href(action=>"commit", hash=>$commit), $ref);
3518                 print "</td>\n" .
3519                       "<td class=\"link\">" .
3520                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3521                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3522
3523                 if ($ftype eq 'blob') {
3524                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3525                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3526                         if (defined $blob_current && defined $blob_parent &&
3527                                         $blob_current ne $blob_parent) {
3528                                 print " | " .
3529                                         $cgi->a({-href => href(action=>"blobdiff",
3530                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3531                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3532                                                                file_name=>$file_name)},
3533                                                 "diff to current");
3534                         }
3535                 }
3536                 print "</td>\n" .
3537                       "</tr>\n";
3538         }
3539         if (defined $extra) {
3540                 print "<tr>\n" .
3541                       "<td colspan=\"4\">$extra</td>\n" .
3542                       "</tr>\n";
3543         }
3544         print "</table>\n";
3545 }
3546
3547 sub git_tags_body {
3548         # uses global variable $project
3549         my ($taglist, $from, $to, $extra) = @_;
3550         $from = 0 unless defined $from;
3551         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3552
3553         print "<table class=\"tags\" cellspacing=\"0\">\n";
3554         my $alternate = 1;
3555         for (my $i = $from; $i <= $to; $i++) {
3556                 my $entry = $taglist->[$i];
3557                 my %tag = %$entry;
3558                 my $comment = $tag{'subject'};
3559                 my $comment_short;
3560                 if (defined $comment) {
3561                         $comment_short = chop_str($comment, 30, 5);
3562                 }
3563                 if ($alternate) {
3564                         print "<tr class=\"dark\">\n";
3565                 } else {
3566                         print "<tr class=\"light\">\n";
3567                 }
3568                 $alternate ^= 1;
3569                 if (defined $tag{'age'}) {
3570                         print "<td><i>$tag{'age'}</i></td>\n";
3571                 } else {
3572                         print "<td></td>\n";
3573                 }
3574                 print "<td>" .
3575                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3576                                -class => "list name"}, esc_html($tag{'name'})) .
3577                       "</td>\n" .
3578                       "<td>";
3579                 if (defined $comment) {
3580                         print format_subject_html($comment, $comment_short,
3581                                                   href(action=>"tag", hash=>$tag{'id'}));
3582                 }
3583                 print "</td>\n" .
3584                       "<td class=\"selflink\">";
3585                 if ($tag{'type'} eq "tag") {
3586                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3587                 } else {
3588                         print "&nbsp;";
3589                 }
3590                 print "</td>\n" .
3591                       "<td class=\"link\">" . " | " .
3592                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3593                 if ($tag{'reftype'} eq "commit") {
3594                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
3595                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
3596                 } elsif ($tag{'reftype'} eq "blob") {
3597                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3598                 }
3599                 print "</td>\n" .
3600                       "</tr>";
3601         }
3602         if (defined $extra) {
3603                 print "<tr>\n" .
3604                       "<td colspan=\"5\">$extra</td>\n" .
3605                       "</tr>\n";
3606         }
3607         print "</table>\n";
3608 }
3609
3610 sub git_heads_body {
3611         # uses global variable $project
3612         my ($headlist, $head, $from, $to, $extra) = @_;
3613         $from = 0 unless defined $from;
3614         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3615
3616         print "<table class=\"heads\" cellspacing=\"0\">\n";
3617         my $alternate = 1;
3618         for (my $i = $from; $i <= $to; $i++) {
3619                 my $entry = $headlist->[$i];
3620                 my %ref = %$entry;
3621                 my $curr = $ref{'id'} eq $head;
3622                 if ($alternate) {
3623                         print "<tr class=\"dark\">\n";
3624                 } else {
3625                         print "<tr class=\"light\">\n";
3626                 }
3627                 $alternate ^= 1;
3628                 print "<td><i>$ref{'age'}</i></td>\n" .
3629                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3630                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
3631                                -class => "list name"},esc_html($ref{'name'})) .
3632                       "</td>\n" .
3633                       "<td class=\"link\">" .
3634                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
3635                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
3636                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
3637                       "</td>\n" .
3638                       "</tr>";
3639         }
3640         if (defined $extra) {
3641                 print "<tr>\n" .
3642                       "<td colspan=\"3\">$extra</td>\n" .
3643                       "</tr>\n";
3644         }
3645         print "</table>\n";
3646 }
3647
3648 sub git_search_grep_body {
3649         my ($commitlist, $from, $to, $extra) = @_;
3650         $from = 0 unless defined $from;
3651         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3652
3653         print "<table class=\"grep\" cellspacing=\"0\">\n";
3654         my $alternate = 1;
3655         for (my $i = $from; $i <= $to; $i++) {
3656                 my %co = %{$commitlist->[$i]};
3657                 if (!%co) {
3658                         next;
3659                 }
3660                 my $commit = $co{'id'};
3661                 if ($alternate) {
3662                         print "<tr class=\"dark\">\n";
3663                 } else {
3664                         print "<tr class=\"light\">\n";
3665                 }
3666                 $alternate ^= 1;
3667                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3668                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
3669                       "<td>" .
3670                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
3671                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
3672                 my $comment = $co{'comment'};
3673                 foreach my $line (@$comment) {
3674                         if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
3675                                 my $lead = esc_html($1) || "";
3676                                 $lead = chop_str($lead, 30, 10);
3677                                 my $match = esc_html($2) || "";
3678                                 my $trail = esc_html($3) || "";
3679                                 $trail = chop_str($trail, 30, 10);
3680                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
3681                                 print chop_str($text, 80, 5) . "<br/>\n";
3682                         }
3683                 }
3684                 print "</td>\n" .
3685                       "<td class=\"link\">" .
3686                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3687                       " | " .
3688                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3689                 print "</td>\n" .
3690                       "</tr>\n";
3691         }
3692         if (defined $extra) {
3693                 print "<tr>\n" .
3694                       "<td colspan=\"3\">$extra</td>\n" .
3695                       "</tr>\n";
3696         }
3697         print "</table>\n";
3698 }
3699
3700 ## ======================================================================
3701 ## ======================================================================
3702 ## actions
3703
3704 sub git_project_list {
3705         my $order = $cgi->param('o');
3706         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3707                 die_error(undef, "Unknown order parameter");
3708         }
3709
3710         my @list = git_get_projects_list();
3711         if (!@list) {
3712                 die_error(undef, "No projects found");
3713         }
3714
3715         git_header_html();
3716         if (-f $home_text) {
3717                 print "<div class=\"index_include\">\n";
3718                 open (my $fd, $home_text);
3719                 print <$fd>;
3720                 close $fd;
3721                 print "</div>\n";
3722         }
3723         git_project_list_body(\@list, $order);
3724         git_footer_html();
3725 }
3726
3727 sub git_forks {
3728         my $order = $cgi->param('o');
3729         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3730                 die_error(undef, "Unknown order parameter");
3731         }
3732
3733         my @list = git_get_projects_list($project);
3734         if (!@list) {
3735                 die_error(undef, "No forks found");
3736         }
3737
3738         git_header_html();
3739         git_print_page_nav('','');
3740         git_print_header_div('summary', "$project forks");
3741         git_project_list_body(\@list, $order);
3742         git_footer_html();
3743 }
3744
3745 sub git_project_index {
3746         my @projects = git_get_projects_list($project);
3747
3748         print $cgi->header(
3749                 -type => 'text/plain',
3750                 -charset => 'utf-8',
3751                 -content_disposition => 'inline; filename="index.aux"');
3752
3753         foreach my $pr (@projects) {
3754                 if (!exists $pr->{'owner'}) {
3755                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3756                 }
3757
3758                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3759                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3760                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3761                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3762                 $path  =~ s/ /\+/g;
3763                 $owner =~ s/ /\+/g;
3764
3765                 print "$path $owner\n";
3766         }
3767 }
3768
3769 sub git_summary {
3770         my $descr = git_get_project_description($project) || "none";
3771         my %co = parse_commit("HEAD");
3772         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3773         my $head = $co{'id'};
3774
3775         my $owner = git_get_project_owner($project);
3776
3777         my $refs = git_get_references();
3778         # These get_*_list functions return one more to allow us to see if
3779         # there are more ...
3780         my @taglist  = git_get_tags_list(16);
3781         my @headlist = git_get_heads_list(16);
3782         my @forklist;
3783         my ($check_forks) = gitweb_check_feature('forks');
3784
3785         if ($check_forks) {
3786                 @forklist = git_get_projects_list($project);
3787         }
3788
3789         git_header_html();
3790         git_print_page_nav('summary','', $head);
3791
3792         print "<div class=\"title\">&nbsp;</div>\n";
3793         print "<table cellspacing=\"0\">\n" .
3794               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3795               "<tr><td>owner</td><td>$owner</td></tr>\n";
3796         if (defined $cd{'rfc2822'}) {
3797                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3798         }
3799
3800         # use per project git URL list in $projectroot/$project/cloneurl
3801         # or make project git URL from git base URL and project name
3802         my $url_tag = "URL";
3803         my @url_list = git_get_project_url_list($project);
3804         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3805         foreach my $git_url (@url_list) {
3806                 next unless $git_url;
3807                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3808                 $url_tag = "";
3809         }
3810         print "</table>\n";
3811
3812         if (-s "$projectroot/$project/README.html") {
3813                 if (open my $fd, "$projectroot/$project/README.html") {
3814                         print "<div class=\"title\">readme</div>\n";
3815                         print $_ while (<$fd>);
3816                         close $fd;
3817                 }
3818         }
3819
3820         # we need to request one more than 16 (0..15) to check if
3821         # those 16 are all
3822         my @commitlist = $head ? parse_commits($head, 17) : ();
3823         if (@commitlist) {
3824                 git_print_header_div('shortlog');
3825                 git_shortlog_body(\@commitlist, 0, 15, $refs,
3826                                   $#commitlist <=  15 ? undef :
3827                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
3828         }
3829
3830         if (@taglist) {
3831                 git_print_header_div('tags');
3832                 git_tags_body(\@taglist, 0, 15,
3833                               $#taglist <=  15 ? undef :
3834                               $cgi->a({-href => href(action=>"tags")}, "..."));
3835         }
3836
3837         if (@headlist) {
3838                 git_print_header_div('heads');
3839                 git_heads_body(\@headlist, $head, 0, 15,
3840                                $#headlist <= 15 ? undef :
3841                                $cgi->a({-href => href(action=>"heads")}, "..."));
3842         }
3843
3844         if (@forklist) {
3845                 git_print_header_div('forks');
3846                 git_project_list_body(\@forklist, undef, 0, 15,
3847                                       $#forklist <= 15 ? undef :
3848                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3849                                       'noheader');
3850         }
3851
3852         git_footer_html();
3853 }
3854
3855 sub git_tag {
3856         my $head = git_get_head_hash($project);
3857         git_header_html();
3858         git_print_page_nav('','', $head,undef,$head);
3859         my %tag = parse_tag($hash);
3860
3861         if (! %tag) {
3862                 die_error(undef, "Unknown tag object");
3863         }
3864
3865         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3866         print "<div class=\"title_text\">\n" .
3867               "<table cellspacing=\"0\">\n" .
3868               "<tr>\n" .
3869               "<td>object</td>\n" .
3870               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3871                                $tag{'object'}) . "</td>\n" .
3872               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3873                                               $tag{'type'}) . "</td>\n" .
3874               "</tr>\n";
3875         if (defined($tag{'author'})) {
3876                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3877                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3878                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3879                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3880                         "</td></tr>\n";
3881         }
3882         print "</table>\n\n" .
3883               "</div>\n";
3884         print "<div class=\"page_body\">";
3885         my $comment = $tag{'comment'};
3886         foreach my $line (@$comment) {
3887                 chomp $line;
3888                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3889         }
3890         print "</div>\n";
3891         git_footer_html();
3892 }
3893
3894 sub git_blame2 {
3895         my $fd;
3896         my $ftype;
3897
3898         my ($have_blame) = gitweb_check_feature('blame');
3899         if (!$have_blame) {
3900                 die_error('403 Permission denied', "Permission denied");
3901         }
3902         die_error('404 Not Found', "File name not defined") if (!$file_name);
3903         $hash_base ||= git_get_head_hash($project);
3904         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3905         my %co = parse_commit($hash_base)
3906                 or die_error(undef, "Reading commit failed");
3907         if (!defined $hash) {
3908                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3909                         or die_error(undef, "Error looking up file");
3910         }
3911         $ftype = git_get_type($hash);
3912         if ($ftype !~ "blob") {
3913                 die_error('400 Bad Request', "Object is not a blob");
3914         }
3915         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3916               $file_name, $hash_base)
3917                 or die_error(undef, "Open git-blame failed");
3918         git_header_html();
3919         my $formats_nav =
3920                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3921                         "blob") .
3922                 " | " .
3923                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3924                         "history") .
3925                 " | " .
3926                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3927                         "HEAD");
3928         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3929         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3930         git_print_page_path($file_name, $ftype, $hash_base);
3931         my @rev_color = (qw(light2 dark2));
3932         my $num_colors = scalar(@rev_color);
3933         my $current_color = 0;
3934         my $last_rev;
3935         print <<HTML;
3936 <div class="page_body">
3937 <table class="blame">
3938 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3939 HTML
3940         my %metainfo = ();
3941         while (1) {
3942                 $_ = <$fd>;
3943                 last unless defined $_;
3944                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3945                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3946                 if (!exists $metainfo{$full_rev}) {
3947                         $metainfo{$full_rev} = {};
3948                 }
3949                 my $meta = $metainfo{$full_rev};
3950                 while (<$fd>) {
3951                         last if (s/^\t//);
3952                         if (/^(\S+) (.*)$/) {
3953                                 $meta->{$1} = $2;
3954                         }
3955                 }
3956                 my $data = $_;
3957                 chomp $data;
3958                 my $rev = substr($full_rev, 0, 8);
3959                 my $author = $meta->{'author'};
3960                 my %date = parse_date($meta->{'author-time'},
3961                                       $meta->{'author-tz'});
3962                 my $date = $date{'iso-tz'};
3963                 if ($group_size) {
3964                         $current_color = ++$current_color % $num_colors;
3965                 }
3966                 print "<tr class=\"$rev_color[$current_color]\">\n";
3967                 if ($group_size) {
3968                         print "<td class=\"sha1\"";
3969                         print " title=\"". esc_html($author) . ", $date\"";
3970                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3971                         print ">";
3972                         print $cgi->a({-href => href(action=>"commit",
3973                                                      hash=>$full_rev,
3974                                                      file_name=>$file_name)},
3975                                       esc_html($rev));
3976                         print "</td>\n";
3977                 }
3978                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
3979                         or die_error(undef, "Open git-rev-parse failed");
3980                 my $parent_commit = <$dd>;
3981                 close $dd;
3982                 chomp($parent_commit);
3983                 my $blamed = href(action => 'blame',
3984                                   file_name => $meta->{'filename'},
3985                                   hash_base => $parent_commit);
3986                 print "<td class=\"linenr\">";
3987                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3988                                 -id => "l$lineno",
3989                                 -class => "linenr" },
3990                               esc_html($lineno));
3991                 print "</td>";
3992                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3993                 print "</tr>\n";
3994         }
3995         print "</table>\n";
3996         print "</div>";
3997         close $fd
3998                 or print "Reading blob failed\n";
3999         git_footer_html();
4000 }
4001
4002 sub git_blame {
4003         my $fd;
4004
4005         my ($have_blame) = gitweb_check_feature('blame');
4006         if (!$have_blame) {
4007                 die_error('403 Permission denied', "Permission denied");
4008         }
4009         die_error('404 Not Found', "File name not defined") if (!$file_name);
4010         $hash_base ||= git_get_head_hash($project);
4011         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4012         my %co = parse_commit($hash_base)
4013                 or die_error(undef, "Reading commit failed");
4014         if (!defined $hash) {
4015                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4016                         or die_error(undef, "Error lookup file");
4017         }
4018         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4019                 or die_error(undef, "Open git-annotate failed");
4020         git_header_html();
4021         my $formats_nav =
4022                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4023                         "blob") .
4024                 " | " .
4025                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4026                         "history") .
4027                 " | " .
4028                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4029                         "HEAD");
4030         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4031         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4032         git_print_page_path($file_name, 'blob', $hash_base);
4033         print "<div class=\"page_body\">\n";
4034         print <<HTML;
4035 <table class="blame">
4036   <tr>
4037     <th>Commit</th>
4038     <th>Age</th>
4039     <th>Author</th>
4040     <th>Line</th>
4041     <th>Data</th>
4042   </tr>
4043 HTML
4044         my @line_class = (qw(light dark));
4045         my $line_class_len = scalar (@line_class);
4046         my $line_class_num = $#line_class;
4047         while (my $line = <$fd>) {
4048                 my $long_rev;
4049                 my $short_rev;
4050                 my $author;
4051                 my $time;
4052                 my $lineno;
4053                 my $data;
4054                 my $age;
4055                 my $age_str;
4056                 my $age_class;
4057
4058                 chomp $line;
4059                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4060
4061                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4062                         $long_rev = $1;
4063                         $author   = $2;
4064                         $time     = $3;
4065                         $lineno   = $4;
4066                         $data     = $5;
4067                 } else {
4068                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4069                         next;
4070                 }
4071                 $short_rev  = substr ($long_rev, 0, 8);
4072                 $age        = time () - $time;
4073                 $age_str    = age_string ($age);
4074                 $age_str    =~ s/ /&nbsp;/g;
4075                 $age_class  = age_class($age);
4076                 $author     = esc_html ($author);
4077                 $author     =~ s/ /&nbsp;/g;
4078
4079                 $data = untabify($data);
4080                 $data = esc_html ($data);
4081
4082                 print <<HTML;
4083   <tr class="$line_class[$line_class_num]">
4084     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4085     <td class="$age_class">$age_str</td>
4086     <td>$author</td>
4087     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4088     <td class="pre">$data</td>
4089   </tr>
4090 HTML
4091         } # while (my $line = <$fd>)
4092         print "</table>\n\n";
4093         close $fd
4094                 or print "Reading blob failed.\n";
4095         print "</div>";
4096         git_footer_html();
4097 }
4098
4099 sub git_tags {
4100         my $head = git_get_head_hash($project);
4101         git_header_html();
4102         git_print_page_nav('','', $head,undef,$head);
4103         git_print_header_div('summary', $project);
4104
4105         my @tagslist = git_get_tags_list();
4106         if (@tagslist) {
4107                 git_tags_body(\@tagslist);
4108         }
4109         git_footer_html();
4110 }
4111
4112 sub git_heads {
4113         my $head = git_get_head_hash($project);
4114         git_header_html();
4115         git_print_page_nav('','', $head,undef,$head);
4116         git_print_header_div('summary', $project);
4117
4118         my @headslist = git_get_heads_list();
4119         if (@headslist) {
4120                 git_heads_body(\@headslist, $head);
4121         }
4122         git_footer_html();
4123 }
4124
4125 sub git_blob_plain {
4126         my $expires;
4127
4128         if (!defined $hash) {
4129                 if (defined $file_name) {
4130                         my $base = $hash_base || git_get_head_hash($project);
4131                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4132                                 or die_error(undef, "Error lookup file");
4133                 } else {
4134                         die_error(undef, "No file name defined");
4135                 }
4136         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4137                 # blobs defined by non-textual hash id's can be cached
4138                 $expires = "+1d";
4139         }
4140
4141         my $type = shift;
4142         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4143                 or die_error(undef, "Couldn't cat $file_name, $hash");
4144
4145         $type ||= blob_mimetype($fd, $file_name);
4146
4147         # save as filename, even when no $file_name is given
4148         my $save_as = "$hash";
4149         if (defined $file_name) {
4150                 $save_as = $file_name;
4151         } elsif ($type =~ m/^text\//) {
4152                 $save_as .= '.txt';
4153         }
4154
4155         print $cgi->header(
4156                 -type => "$type",
4157                 -expires=>$expires,
4158                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4159         undef $/;
4160         binmode STDOUT, ':raw';
4161         print <$fd>;
4162         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4163         $/ = "\n";
4164         close $fd;
4165 }
4166
4167 sub git_blob {
4168         my $expires;
4169
4170         if (!defined $hash) {
4171                 if (defined $file_name) {
4172                         my $base = $hash_base || git_get_head_hash($project);
4173                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4174                                 or die_error(undef, "Error lookup file");
4175                 } else {
4176                         die_error(undef, "No file name defined");
4177                 }
4178         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4179                 # blobs defined by non-textual hash id's can be cached
4180                 $expires = "+1d";
4181         }
4182
4183         my ($have_blame) = gitweb_check_feature('blame');
4184         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4185                 or die_error(undef, "Couldn't cat $file_name, $hash");
4186         my $mimetype = blob_mimetype($fd, $file_name);
4187         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
4188                 close $fd;
4189                 return git_blob_plain($mimetype);
4190         }
4191         # we can have blame only for text/* mimetype
4192         $have_blame &&= ($mimetype =~ m!^text/!);
4193
4194         git_header_html(undef, $expires);
4195         my $formats_nav = '';
4196         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4197                 if (defined $file_name) {
4198                         if ($have_blame) {
4199                                 $formats_nav .=
4200                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
4201                                                                hash=>$hash, file_name=>$file_name)},
4202                                                 "blame") .
4203                                         " | ";
4204                         }
4205                         $formats_nav .=
4206                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4207                                                        hash=>$hash, file_name=>$file_name)},
4208                                         "history") .
4209                                 " | " .
4210                                 $cgi->a({-href => href(action=>"blob_plain",
4211                                                        hash=>$hash, file_name=>$file_name)},
4212                                         "raw") .
4213                                 " | " .
4214                                 $cgi->a({-href => href(action=>"blob",
4215                                                        hash_base=>"HEAD", file_name=>$file_name)},
4216                                         "HEAD");
4217                 } else {
4218                         $formats_nav .=
4219                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
4220                 }
4221                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4222                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4223         } else {
4224                 print "<div class=\"page_nav\">\n" .
4225                       "<br/><br/></div>\n" .
4226                       "<div class=\"title\">$hash</div>\n";
4227         }
4228         git_print_page_path($file_name, "blob", $hash_base);
4229         print "<div class=\"page_body\">\n";
4230         if ($mimetype =~ m!^text/!) {
4231                 my $nr;
4232                 while (my $line = <$fd>) {
4233                         chomp $line;
4234                         $nr++;
4235                         $line = untabify($line);
4236                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4237                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4238                 }
4239         } elsif ($mimetype =~ m!^image/!) {
4240                 print qq!<img type="$mimetype"!;
4241                 if ($file_name) {
4242                         print qq! alt="$file_name" title="$file_name"!;
4243                 }
4244                 print qq! src="! .
4245                       href(action=>"blob_plain", hash=>$hash,
4246                            hash_base=>$hash_base, file_name=>$file_name) .
4247                       qq!" />\n!;
4248         }
4249         close $fd
4250                 or print "Reading blob failed.\n";
4251         print "</div>";
4252         git_footer_html();
4253 }
4254
4255 sub git_tree {
4256         if (!defined $hash_base) {
4257                 $hash_base = "HEAD";
4258         }
4259         if (!defined $hash) {
4260                 if (defined $file_name) {
4261                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4262                 } else {
4263                         $hash = $hash_base;
4264                 }
4265         }
4266         $/ = "\0";
4267         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4268                 or die_error(undef, "Open git-ls-tree failed");
4269         my @entries = map { chomp; $_ } <$fd>;
4270         close $fd or die_error(undef, "Reading tree failed");
4271         $/ = "\n";
4272
4273         my $refs = git_get_references();
4274         my $ref = format_ref_marker($refs, $hash_base);
4275         git_header_html();
4276         my $basedir = '';
4277         my ($have_blame) = gitweb_check_feature('blame');
4278         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4279                 my @views_nav = ();
4280                 if (defined $file_name) {
4281                         push @views_nav,
4282                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4283                                                        hash=>$hash, file_name=>$file_name)},
4284                                         "history"),
4285                                 $cgi->a({-href => href(action=>"tree",
4286                                                        hash_base=>"HEAD", file_name=>$file_name)},
4287                                         "HEAD"),
4288                 }
4289                 my $snapshot_links = format_snapshot_links($hash);
4290                 if (defined $snapshot_links) {
4291                         # FIXME: Should be available when we have no hash base as well.
4292                         push @views_nav, $snapshot_links;
4293                 }
4294                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4295                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4296         } else {
4297                 undef $hash_base;
4298                 print "<div class=\"page_nav\">\n";
4299                 print "<br/><br/></div>\n";
4300                 print "<div class=\"title\">$hash</div>\n";
4301         }
4302         if (defined $file_name) {
4303                 $basedir = $file_name;
4304                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4305                         $basedir .= '/';
4306                 }
4307         }
4308         git_print_page_path($file_name, 'tree', $hash_base);
4309         print "<div class=\"page_body\">\n";
4310         print "<table cellspacing=\"0\">\n";
4311         my $alternate = 1;
4312         # '..' (top directory) link if possible
4313         if (defined $hash_base &&
4314             defined $file_name && $file_name =~ m![^/]+$!) {
4315                 if ($alternate) {
4316                         print "<tr class=\"dark\">\n";
4317                 } else {
4318                         print "<tr class=\"light\">\n";
4319                 }
4320                 $alternate ^= 1;
4321
4322                 my $up = $file_name;
4323                 $up =~ s!/?[^/]+$!!;
4324                 undef $up unless $up;
4325                 # based on git_print_tree_entry
4326                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4327                 print '<td class="list">';
4328                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4329                                              file_name=>$up)},
4330                               "..");
4331                 print "</td>\n";
4332                 print "<td class=\"link\"></td>\n";
4333
4334                 print "</tr>\n";
4335         }
4336         foreach my $line (@entries) {
4337                 my %t = parse_ls_tree_line($line, -z => 1);
4338
4339                 if ($alternate) {
4340                         print "<tr class=\"dark\">\n";
4341                 } else {
4342                         print "<tr class=\"light\">\n";
4343                 }
4344                 $alternate ^= 1;
4345
4346                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4347
4348                 print "</tr>\n";
4349         }
4350         print "</table>\n" .
4351               "</div>";
4352         git_footer_html();
4353 }
4354
4355 sub git_snapshot {
4356         my @supported_fmts = gitweb_check_feature('snapshot');
4357         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4358
4359         my $format = $cgi->param('sf');
4360         if (!@supported_fmts) {
4361                 die_error('403 Permission denied', "Permission denied");
4362         }
4363         # default to first supported snapshot format
4364         $format ||= $supported_fmts[0];
4365         if ($format !~ m/^[a-z0-9]+$/) {
4366                 die_error(undef, "Invalid snapshot format parameter");
4367         } elsif (!exists($known_snapshot_formats{$format})) {
4368                 die_error(undef, "Unknown snapshot format");
4369         } elsif (!grep($_ eq $format, @supported_fmts)) {
4370                 die_error(undef, "Unsupported snapshot format");
4371         }
4372
4373         if (!defined $hash) {
4374                 $hash = git_get_head_hash($project);
4375         }
4376
4377         my $git_command = git_cmd_str();
4378         my $name = $project;
4379         $name =~ s,([^/])/*\.git$,$1,;
4380         $name = basename($name);
4381         my $filename = to_utf8($name);
4382         $name =~ s/\047/\047\\\047\047/g;
4383         my $cmd;
4384         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4385         $cmd = "$git_command archive " .
4386                 "--format=$known_snapshot_formats{$format}{'format'} " .
4387                 "--prefix=\'$name\'/ $hash";
4388         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4389                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4390         }
4391
4392         print $cgi->header(
4393                 -type => $known_snapshot_formats{$format}{'type'},
4394                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4395                 -status => '200 OK');
4396
4397         open my $fd, "-|", $cmd
4398                 or die_error(undef, "Execute git-archive failed");
4399         binmode STDOUT, ':raw';
4400         print <$fd>;
4401         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4402         close $fd;
4403 }
4404
4405 sub git_log {
4406         my $head = git_get_head_hash($project);
4407         if (!defined $hash) {
4408                 $hash = $head;
4409         }
4410         if (!defined $page) {
4411                 $page = 0;
4412         }
4413         my $refs = git_get_references();
4414
4415         my @commitlist = parse_commits($hash, 101, (100 * $page));
4416
4417         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4418
4419         git_header_html();
4420         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4421
4422         if (!@commitlist) {
4423                 my %co = parse_commit($hash);
4424
4425                 git_print_header_div('summary', $project);
4426                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4427         }
4428         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4429         for (my $i = 0; $i <= $to; $i++) {
4430                 my %co = %{$commitlist[$i]};
4431                 next if !%co;
4432                 my $commit = $co{'id'};
4433                 my $ref = format_ref_marker($refs, $commit);
4434                 my %ad = parse_date($co{'author_epoch'});
4435                 git_print_header_div('commit',
4436                                "<span class=\"age\">$co{'age_string'}</span>" .
4437                                esc_html($co{'title'}) . $ref,
4438                                $commit);
4439                 print "<div class=\"title_text\">\n" .
4440                       "<div class=\"log_link\">\n" .
4441                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4442                       " | " .
4443                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4444                       " | " .
4445                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4446                       "<br/>\n" .
4447                       "</div>\n" .
4448                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4449                       "</div>\n";
4450
4451                 print "<div class=\"log_body\">\n";
4452                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4453                 print "</div>\n";
4454         }
4455         if ($#commitlist >= 100) {
4456                 print "<div class=\"page_nav\">\n";
4457                 print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
4458                                -accesskey => "n", -title => "Alt-n"}, "next");
4459                 print "</div>\n";
4460         }
4461         git_footer_html();
4462 }
4463
4464 sub git_commit {
4465         $hash ||= $hash_base || "HEAD";
4466         my %co = parse_commit($hash);
4467         if (!%co) {
4468                 die_error(undef, "Unknown commit object");
4469         }
4470         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4471         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4472
4473         my $parent  = $co{'parent'};
4474         my $parents = $co{'parents'}; # listref
4475
4476         # we need to prepare $formats_nav before any parameter munging
4477         my $formats_nav;
4478         if (!defined $parent) {
4479                 # --root commitdiff
4480                 $formats_nav .= '(initial)';
4481         } elsif (@$parents == 1) {
4482                 # single parent commit
4483                 $formats_nav .=
4484                         '(parent: ' .
4485                         $cgi->a({-href => href(action=>"commit",
4486                                                hash=>$parent)},
4487                                 esc_html(substr($parent, 0, 7))) .
4488                         ')';
4489         } else {
4490                 # merge commit
4491                 $formats_nav .=
4492                         '(merge: ' .
4493                         join(' ', map {
4494                                 $cgi->a({-href => href(action=>"commit",
4495                                                        hash=>$_)},
4496                                         esc_html(substr($_, 0, 7)));
4497                         } @$parents ) .
4498                         ')';
4499         }
4500
4501         if (!defined $parent) {
4502                 $parent = "--root";
4503         }
4504         my @difftree;
4505         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4506                 @diff_opts,
4507                 (@$parents <= 1 ? $parent : '-c'),
4508                 $hash, "--"
4509                 or die_error(undef, "Open git-diff-tree failed");
4510         @difftree = map { chomp; $_ } <$fd>;
4511         close $fd or die_error(undef, "Reading git-diff-tree failed");
4512
4513         # non-textual hash id's can be cached
4514         my $expires;
4515         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4516                 $expires = "+1d";
4517         }
4518         my $refs = git_get_references();
4519         my $ref = format_ref_marker($refs, $co{'id'});
4520
4521         git_header_html(undef, $expires);
4522         git_print_page_nav('commit', '',
4523                            $hash, $co{'tree'}, $hash,
4524                            $formats_nav);
4525
4526         if (defined $co{'parent'}) {
4527                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4528         } else {
4529                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4530         }
4531         print "<div class=\"title_text\">\n" .
4532               "<table cellspacing=\"0\">\n";
4533         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4534               "<tr>" .
4535               "<td></td><td> $ad{'rfc2822'}";
4536         if ($ad{'hour_local'} < 6) {
4537                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4538                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4539         } else {
4540                 printf(" (%02d:%02d %s)",
4541                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4542         }
4543         print "</td>" .
4544               "</tr>\n";
4545         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4546         print "<tr><td></td><td> $cd{'rfc2822'}" .
4547               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4548               "</td></tr>\n";
4549         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4550         print "<tr>" .
4551               "<td>tree</td>" .
4552               "<td class=\"sha1\">" .
4553               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4554                        class => "list"}, $co{'tree'}) .
4555               "</td>" .
4556               "<td class=\"link\">" .
4557               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4558                       "tree");
4559         my $snapshot_links = format_snapshot_links($hash);
4560         if (defined $snapshot_links) {
4561                 print " | " . $snapshot_links;
4562         }
4563         print "</td>" .
4564               "</tr>\n";
4565
4566         foreach my $par (@$parents) {
4567                 print "<tr>" .
4568                       "<td>parent</td>" .
4569                       "<td class=\"sha1\">" .
4570                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4571                                class => "list"}, $par) .
4572                       "</td>" .
4573                       "<td class=\"link\">" .
4574                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4575                       " | " .
4576                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4577                       "</td>" .
4578                       "</tr>\n";
4579         }
4580         print "</table>".
4581               "</div>\n";
4582
4583         print "<div class=\"page_body\">\n";
4584         git_print_log($co{'comment'});
4585         print "</div>\n";
4586
4587         git_difftree_body(\@difftree, $hash, @$parents);
4588
4589         git_footer_html();
4590 }
4591
4592 sub git_object {
4593         # object is defined by:
4594         # - hash or hash_base alone
4595         # - hash_base and file_name
4596         my $type;
4597
4598         # - hash or hash_base alone
4599         if ($hash || ($hash_base && !defined $file_name)) {
4600                 my $object_id = $hash || $hash_base;
4601
4602                 my $git_command = git_cmd_str();
4603                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4604                         or die_error('404 Not Found', "Object does not exist");
4605                 $type = <$fd>;
4606                 chomp $type;
4607                 close $fd
4608                         or die_error('404 Not Found', "Object does not exist");
4609
4610         # - hash_base and file_name
4611         } elsif ($hash_base && defined $file_name) {
4612                 $file_name =~ s,/+$,,;
4613
4614                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4615                         or die_error('404 Not Found', "Base object does not exist");
4616
4617                 # here errors should not hapen
4618                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4619                         or die_error(undef, "Open git-ls-tree failed");
4620                 my $line = <$fd>;
4621                 close $fd;
4622
4623                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4624                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4625                         die_error('404 Not Found', "File or directory for given base does not exist");
4626                 }
4627                 $type = $2;
4628                 $hash = $3;
4629         } else {
4630                 die_error('404 Not Found', "Not enough information to find object");
4631         }
4632
4633         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4634                                           hash=>$hash, hash_base=>$hash_base,
4635                                           file_name=>$file_name),
4636                              -status => '302 Found');
4637 }
4638
4639 sub git_blobdiff {
4640         my $format = shift || 'html';
4641
4642         my $fd;
4643         my @difftree;
4644         my %diffinfo;
4645         my $expires;
4646
4647         # preparing $fd and %diffinfo for git_patchset_body
4648         # new style URI
4649         if (defined $hash_base && defined $hash_parent_base) {
4650                 if (defined $file_name) {
4651                         # read raw output
4652                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4653                                 $hash_parent_base, $hash_base,
4654                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4655                                 or die_error(undef, "Open git-diff-tree failed");
4656                         @difftree = map { chomp; $_ } <$fd>;
4657                         close $fd
4658                                 or die_error(undef, "Reading git-diff-tree failed");
4659                         @difftree
4660                                 or die_error('404 Not Found', "Blob diff not found");
4661
4662                 } elsif (defined $hash &&
4663                          $hash =~ /[0-9a-fA-F]{40}/) {
4664                         # try to find filename from $hash
4665
4666                         # read filtered raw output
4667                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4668                                 $hash_parent_base, $hash_base, "--"
4669                                 or die_error(undef, "Open git-diff-tree failed");
4670                         @difftree =
4671                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4672                                 # $hash == to_id
4673                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4674                                 map { chomp; $_ } <$fd>;
4675                         close $fd
4676                                 or die_error(undef, "Reading git-diff-tree failed");
4677                         @difftree
4678                                 or die_error('404 Not Found', "Blob diff not found");
4679
4680                 } else {
4681                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4682                 }
4683
4684                 if (@difftree > 1) {
4685                         die_error('404 Not Found', "Ambiguous blob diff specification");
4686                 }
4687
4688                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4689                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
4690                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
4691
4692                 $hash_parent ||= $diffinfo{'from_id'};
4693                 $hash        ||= $diffinfo{'to_id'};
4694
4695                 # non-textual hash id's can be cached
4696                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4697                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4698                         $expires = '+1d';
4699                 }
4700
4701                 # open patch output
4702                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4703                         '-p', ($format eq 'html' ? "--full-index" : ()),
4704                         $hash_parent_base, $hash_base,
4705                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4706                         or die_error(undef, "Open git-diff-tree failed");
4707         }
4708
4709         # old/legacy style URI
4710         if (!%diffinfo && # if new style URI failed
4711             defined $hash && defined $hash_parent) {
4712                 # fake git-diff-tree raw output
4713                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4714                 $diffinfo{'from_id'} = $hash_parent;
4715                 $diffinfo{'to_id'}   = $hash;
4716                 if (defined $file_name) {
4717                         if (defined $file_parent) {
4718                                 $diffinfo{'status'} = '2';
4719                                 $diffinfo{'from_file'} = $file_parent;
4720                                 $diffinfo{'to_file'}   = $file_name;
4721                         } else { # assume not renamed
4722                                 $diffinfo{'status'} = '1';
4723                                 $diffinfo{'from_file'} = $file_name;
4724                                 $diffinfo{'to_file'}   = $file_name;
4725                         }
4726                 } else { # no filename given
4727                         $diffinfo{'status'} = '2';
4728                         $diffinfo{'from_file'} = $hash_parent;
4729                         $diffinfo{'to_file'}   = $hash;
4730                 }
4731
4732                 # non-textual hash id's can be cached
4733                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4734                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4735                         $expires = '+1d';
4736                 }
4737
4738                 # open patch output
4739                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4740                         '-p', ($format eq 'html' ? "--full-index" : ()),
4741                         $hash_parent, $hash, "--"
4742                         or die_error(undef, "Open git-diff failed");
4743         } else  {
4744                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4745                         unless %diffinfo;
4746         }
4747
4748         # header
4749         if ($format eq 'html') {
4750                 my $formats_nav =
4751                         $cgi->a({-href => href(action=>"blobdiff_plain",
4752                                                hash=>$hash, hash_parent=>$hash_parent,
4753                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
4754                                                file_name=>$file_name, file_parent=>$file_parent)},
4755                                 "raw");
4756                 git_header_html(undef, $expires);
4757                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4758                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4759                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4760                 } else {
4761                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4762                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4763                 }
4764                 if (defined $file_name) {
4765                         git_print_page_path($file_name, "blob", $hash_base);
4766                 } else {
4767                         print "<div class=\"page_path\"></div>\n";
4768                 }
4769
4770         } elsif ($format eq 'plain') {
4771                 print $cgi->header(
4772                         -type => 'text/plain',
4773                         -charset => 'utf-8',
4774                         -expires => $expires,
4775                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4776
4777                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4778
4779         } else {
4780                 die_error(undef, "Unknown blobdiff format");
4781         }
4782
4783         # patch
4784         if ($format eq 'html') {
4785                 print "<div class=\"page_body\">\n";
4786
4787                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4788                 close $fd;
4789
4790                 print "</div>\n"; # class="page_body"
4791                 git_footer_html();
4792
4793         } else {
4794                 while (my $line = <$fd>) {
4795                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4796                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4797
4798                         print $line;
4799
4800                         last if $line =~ m!^\+\+\+!;
4801                 }
4802                 local $/ = undef;
4803                 print <$fd>;
4804                 close $fd;
4805         }
4806 }
4807
4808 sub git_blobdiff_plain {
4809         git_blobdiff('plain');
4810 }
4811
4812 sub git_commitdiff {
4813         my $format = shift || 'html';
4814         $hash ||= $hash_base || "HEAD";
4815         my %co = parse_commit($hash);
4816         if (!%co) {
4817                 die_error(undef, "Unknown commit object");
4818         }
4819
4820         # choose format for commitdiff for merge
4821         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4822                 $hash_parent = '--cc';
4823         }
4824         # we need to prepare $formats_nav before almost any parameter munging
4825         my $formats_nav;
4826         if ($format eq 'html') {
4827                 $formats_nav =
4828                         $cgi->a({-href => href(action=>"commitdiff_plain",
4829                                                hash=>$hash, hash_parent=>$hash_parent)},
4830                                 "raw");
4831
4832                 if (defined $hash_parent &&
4833                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4834                         # commitdiff with two commits given
4835                         my $hash_parent_short = $hash_parent;
4836                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4837                                 $hash_parent_short = substr($hash_parent, 0, 7);
4838                         }
4839                         $formats_nav .=
4840                                 ' (from';
4841                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4842                                 if ($co{'parents'}[$i] eq $hash_parent) {
4843                                         $formats_nav .= ' parent ' . ($i+1);
4844                                         last;
4845                                 }
4846                         }
4847                         $formats_nav .= ': ' .
4848                                 $cgi->a({-href => href(action=>"commitdiff",
4849                                                        hash=>$hash_parent)},
4850                                         esc_html($hash_parent_short)) .
4851                                 ')';
4852                 } elsif (!$co{'parent'}) {
4853                         # --root commitdiff
4854                         $formats_nav .= ' (initial)';
4855                 } elsif (scalar @{$co{'parents'}} == 1) {
4856                         # single parent commit
4857                         $formats_nav .=
4858                                 ' (parent: ' .
4859                                 $cgi->a({-href => href(action=>"commitdiff",
4860                                                        hash=>$co{'parent'})},
4861                                         esc_html(substr($co{'parent'}, 0, 7))) .
4862                                 ')';
4863                 } else {
4864                         # merge commit
4865                         if ($hash_parent eq '--cc') {
4866                                 $formats_nav .= ' | ' .
4867                                         $cgi->a({-href => href(action=>"commitdiff",
4868                                                                hash=>$hash, hash_parent=>'-c')},
4869                                                 'combined');
4870                         } else { # $hash_parent eq '-c'
4871                                 $formats_nav .= ' | ' .
4872                                         $cgi->a({-href => href(action=>"commitdiff",
4873                                                                hash=>$hash, hash_parent=>'--cc')},
4874                                                 'compact');
4875                         }
4876                         $formats_nav .=
4877                                 ' (merge: ' .
4878                                 join(' ', map {
4879                                         $cgi->a({-href => href(action=>"commitdiff",
4880                                                                hash=>$_)},
4881                                                 esc_html(substr($_, 0, 7)));
4882                                 } @{$co{'parents'}} ) .
4883                                 ')';
4884                 }
4885         }
4886
4887         my $hash_parent_param = $hash_parent;
4888         if (!defined $hash_parent_param) {
4889                 # --cc for multiple parents, --root for parentless
4890                 $hash_parent_param =
4891                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
4892         }
4893
4894         # read commitdiff
4895         my $fd;
4896         my @difftree;
4897         if ($format eq 'html') {
4898                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4899                         "--no-commit-id", "--patch-with-raw", "--full-index",
4900                         $hash_parent_param, $hash, "--"
4901                         or die_error(undef, "Open git-diff-tree failed");
4902
4903                 while (my $line = <$fd>) {
4904                         chomp $line;
4905                         # empty line ends raw part of diff-tree output
4906                         last unless $line;
4907                         push @difftree, scalar parse_difftree_raw_line($line);
4908                 }
4909
4910         } elsif ($format eq 'plain') {
4911                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4912                         '-p', $hash_parent_param, $hash, "--"
4913                         or die_error(undef, "Open git-diff-tree failed");
4914
4915         } else {
4916                 die_error(undef, "Unknown commitdiff format");
4917         }
4918
4919         # non-textual hash id's can be cached
4920         my $expires;
4921         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4922                 $expires = "+1d";
4923         }
4924
4925         # write commit message
4926         if ($format eq 'html') {
4927                 my $refs = git_get_references();
4928                 my $ref = format_ref_marker($refs, $co{'id'});
4929
4930                 git_header_html(undef, $expires);
4931                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4932                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4933                 git_print_authorship(\%co);
4934                 print "<div class=\"page_body\">\n";
4935                 if (@{$co{'comment'}} > 1) {
4936                         print "<div class=\"log\">\n";
4937                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4938                         print "</div>\n"; # class="log"
4939                 }
4940
4941         } elsif ($format eq 'plain') {
4942                 my $refs = git_get_references("tags");
4943                 my $tagname = git_get_rev_name_tags($hash);
4944                 my $filename = basename($project) . "-$hash.patch";
4945
4946                 print $cgi->header(
4947                         -type => 'text/plain',
4948                         -charset => 'utf-8',
4949                         -expires => $expires,
4950                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4951                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4952                 print <<TEXT;
4953 From: $co{'author'}
4954 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4955 Subject: $co{'title'}
4956 TEXT
4957                 print "X-Git-Tag: $tagname\n" if $tagname;
4958                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4959
4960                 foreach my $line (@{$co{'comment'}}) {
4961                         print "$line\n";
4962                 }
4963                 print "---\n\n";
4964         }
4965
4966         # write patch
4967         if ($format eq 'html') {
4968                 my $use_parents = !defined $hash_parent ||
4969                         $hash_parent eq '-c' || $hash_parent eq '--cc';
4970                 git_difftree_body(\@difftree, $hash,
4971                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4972                 print "<br/>\n";
4973
4974                 git_patchset_body($fd, \@difftree, $hash,
4975                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
4976                 close $fd;
4977                 print "</div>\n"; # class="page_body"
4978                 git_footer_html();
4979
4980         } elsif ($format eq 'plain') {
4981                 local $/ = undef;
4982                 print <$fd>;
4983                 close $fd
4984                         or print "Reading git-diff-tree failed\n";
4985         }
4986 }
4987
4988 sub git_commitdiff_plain {
4989         git_commitdiff('plain');
4990 }
4991
4992 sub git_history {
4993         if (!defined $hash_base) {
4994                 $hash_base = git_get_head_hash($project);
4995         }
4996         if (!defined $page) {
4997                 $page = 0;
4998         }
4999         my $ftype;
5000         my %co = parse_commit($hash_base);
5001         if (!%co) {
5002                 die_error(undef, "Unknown commit object");
5003         }
5004
5005         my $refs = git_get_references();
5006         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5007
5008         if (!defined $hash && defined $file_name) {
5009                 $hash = git_get_hash_by_path($hash_base, $file_name);
5010         }
5011         if (defined $hash) {
5012                 $ftype = git_get_type($hash);
5013         }
5014
5015         my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
5016
5017         my $paging_nav = '';
5018         if ($page > 0) {
5019                 $paging_nav .=
5020                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5021                                                file_name=>$file_name)},
5022                                 "first");
5023                 $paging_nav .= " &sdot; " .
5024                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5025                                                file_name=>$file_name, page=>$page-1),
5026                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5027         } else {
5028                 $paging_nav .= "first";
5029                 $paging_nav .= " &sdot; prev";
5030         }
5031         if ($#commitlist >= 100) {
5032                 $paging_nav .= " &sdot; " .
5033                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5034                                                file_name=>$file_name, page=>$page+1),
5035                                  -accesskey => "n", -title => "Alt-n"}, "next");
5036         } else {
5037                 $paging_nav .= " &sdot; next";
5038         }
5039         my $next_link = '';
5040         if ($#commitlist >= 100) {
5041                 $next_link =
5042                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5043                                                file_name=>$file_name, page=>$page+1),
5044                                  -accesskey => "n", -title => "Alt-n"}, "next");
5045         }
5046
5047         git_header_html();
5048         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5049         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5050         git_print_page_path($file_name, $ftype, $hash_base);
5051
5052         git_history_body(\@commitlist, 0, 99,
5053                          $refs, $hash_base, $ftype, $next_link);
5054
5055         git_footer_html();
5056 }
5057
5058 sub git_search {
5059         my ($have_search) = gitweb_check_feature('search');
5060         if (!$have_search) {
5061                 die_error('403 Permission denied', "Permission denied");
5062         }
5063         if (!defined $searchtext) {
5064                 die_error(undef, "Text field empty");
5065         }
5066         if (!defined $hash) {
5067                 $hash = git_get_head_hash($project);
5068         }
5069         my %co = parse_commit($hash);
5070         if (!%co) {
5071                 die_error(undef, "Unknown commit object");
5072         }
5073         if (!defined $page) {
5074                 $page = 0;
5075         }
5076
5077         $searchtype ||= 'commit';
5078         if ($searchtype eq 'pickaxe') {
5079                 # pickaxe may take all resources of your box and run for several minutes
5080                 # with every query - so decide by yourself how public you make this feature
5081                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5082                 if (!$have_pickaxe) {
5083                         die_error('403 Permission denied', "Permission denied");
5084                 }
5085         }
5086         if ($searchtype eq 'grep') {
5087                 my ($have_grep) = gitweb_check_feature('grep');
5088                 if (!$have_grep) {
5089                         die_error('403 Permission denied', "Permission denied");
5090                 }
5091         }
5092
5093         git_header_html();
5094
5095         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5096                 my $greptype;
5097                 if ($searchtype eq 'commit') {
5098                         $greptype = "--grep=";
5099                 } elsif ($searchtype eq 'author') {
5100                         $greptype = "--author=";
5101                 } elsif ($searchtype eq 'committer') {
5102                         $greptype = "--committer=";
5103                 }
5104                 $greptype .= $search_regexp;
5105                 my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
5106
5107                 my $paging_nav = '';
5108                 if ($page > 0) {
5109                         $paging_nav .=
5110                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5111                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
5112                                         "first");
5113                         $paging_nav .= " &sdot; " .
5114                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5115                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5116                                                        page=>$page-1),
5117                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5118                 } else {
5119                         $paging_nav .= "first";
5120                         $paging_nav .= " &sdot; prev";
5121                 }
5122                 if ($#commitlist >= 100) {
5123                         $paging_nav .= " &sdot; " .
5124                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5125                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5126                                                        page=>$page+1),
5127                                          -accesskey => "n", -title => "Alt-n"}, "next");
5128                 } else {
5129                         $paging_nav .= " &sdot; next";
5130                 }
5131                 my $next_link = '';
5132                 if ($#commitlist >= 100) {
5133                         $next_link =
5134                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5135                                                        searchtext=>$searchtext, searchtype=>$searchtype,
5136                                                        page=>$page+1),
5137                                          -accesskey => "n", -title => "Alt-n"}, "next");
5138                 }
5139
5140                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5141                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5142                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5143         }
5144
5145         if ($searchtype eq 'pickaxe') {
5146                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5147                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5148
5149                 print "<table cellspacing=\"0\">\n";
5150                 my $alternate = 1;
5151                 $/ = "\n";
5152                 my $git_command = git_cmd_str();
5153                 my $searchqtext = $searchtext;
5154                 $searchqtext =~ s/'/'\\''/;
5155                 open my $fd, "-|", "$git_command rev-list $hash | " .
5156                         "$git_command diff-tree -r --stdin -S\'$searchqtext\'";
5157                 undef %co;
5158                 my @files;
5159                 while (my $line = <$fd>) {
5160                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
5161                                 my %set;
5162                                 $set{'file'} = $6;
5163                                 $set{'from_id'} = $3;
5164                                 $set{'to_id'} = $4;
5165                                 $set{'id'} = $set{'to_id'};
5166                                 if ($set{'id'} =~ m/0{40}/) {
5167                                         $set{'id'} = $set{'from_id'};
5168                                 }
5169                                 if ($set{'id'} =~ m/0{40}/) {
5170                                         next;
5171                                 }
5172                                 push @files, \%set;
5173                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
5174                                 if (%co) {
5175                                         if ($alternate) {
5176                                                 print "<tr class=\"dark\">\n";
5177                                         } else {
5178                                                 print "<tr class=\"light\">\n";
5179                                         }
5180                                         $alternate ^= 1;
5181                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5182                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
5183                                               "<td>" .
5184                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5185                                                       -class => "list subject"},
5186                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
5187                                         while (my $setref = shift @files) {
5188                                                 my %set = %$setref;
5189                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5190                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
5191                                                               -class => "list"},
5192                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5193                                                       "<br/>\n";
5194                                         }
5195                                         print "</td>\n" .
5196                                               "<td class=\"link\">" .
5197                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5198                                               " | " .
5199                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5200                                         print "</td>\n" .
5201                                               "</tr>\n";
5202                                 }
5203                                 %co = parse_commit($1);
5204                         }
5205                 }
5206                 close $fd;
5207
5208                 print "</table>\n";
5209         }
5210
5211         if ($searchtype eq 'grep') {
5212                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5213                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5214
5215                 print "<table cellspacing=\"0\">\n";
5216                 my $alternate = 1;
5217                 my $matches = 0;
5218                 $/ = "\n";
5219                 open my $fd, "-|", git_cmd(), 'grep', '-n', '-i', '-E', $searchtext, $co{'tree'};
5220                 my $lastfile = '';
5221                 while (my $line = <$fd>) {
5222                         chomp $line;
5223                         my ($file, $lno, $ltext, $binary);
5224                         last if ($matches++ > 1000);
5225                         if ($line =~ /^Binary file (.+) matches$/) {
5226                                 $file = $1;
5227                                 $binary = 1;
5228                         } else {
5229                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5230                         }
5231                         if ($file ne $lastfile) {
5232                                 $lastfile and print "</td></tr>\n";
5233                                 if ($alternate++) {
5234                                         print "<tr class=\"dark\">\n";
5235                                 } else {
5236                                         print "<tr class=\"light\">\n";
5237                                 }
5238                                 print "<td class=\"list\">".
5239                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5240                                                                file_name=>"$file"),
5241                                                 -class => "list"}, esc_path($file));
5242                                 print "</td><td>\n";
5243                                 $lastfile = $file;
5244                         }
5245                         if ($binary) {
5246                                 print "<div class=\"binary\">Binary file</div>\n";
5247                         } else {
5248                                 $ltext = untabify($ltext);
5249                                 if ($ltext =~ m/^(.*)($searchtext)(.*)$/i) {
5250                                         $ltext = esc_html($1, -nbsp=>1);
5251                                         $ltext .= '<span class="match">';
5252                                         $ltext .= esc_html($2, -nbsp=>1);
5253                                         $ltext .= '</span>';
5254                                         $ltext .= esc_html($3, -nbsp=>1);
5255                                 } else {
5256                                         $ltext = esc_html($ltext, -nbsp=>1);
5257                                 }
5258                                 print "<div class=\"pre\">" .
5259                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5260                                                                file_name=>"$file").'#l'.$lno,
5261                                                 -class => "linenr"}, sprintf('%4i', $lno))
5262                                         . ' ' .  $ltext . "</div>\n";
5263                         }
5264                 }
5265                 if ($lastfile) {
5266                         print "</td></tr>\n";
5267                         if ($matches > 1000) {
5268                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5269                         }
5270                 } else {
5271                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5272                 }
5273                 close $fd;
5274
5275                 print "</table>\n";
5276         }
5277         git_footer_html();
5278 }
5279
5280 sub git_search_help {
5281         git_header_html();
5282         git_print_page_nav('','', $hash,$hash,$hash);
5283         print <<EOT;
5284 <dl>
5285 <dt><b>commit</b></dt>
5286 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
5287 EOT
5288         my ($have_grep) = gitweb_check_feature('grep');
5289         if ($have_grep) {
5290                 print <<EOT;
5291 <dt><b>grep</b></dt>
5292 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5293     a different one) are searched for the given
5294 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a>
5295 (POSIX extended) and the matches are listed. On large
5296 trees, this search can take a while and put some strain on the server, so please use it with
5297 some consideration.</dd>
5298 EOT
5299         }
5300         print <<EOT;
5301 <dt><b>author</b></dt>
5302 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
5303 <dt><b>committer</b></dt>
5304 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
5305 EOT
5306         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5307         if ($have_pickaxe) {
5308                 print <<EOT;
5309 <dt><b>pickaxe</b></dt>
5310 <dd>All commits that caused the string to appear or disappear from any file (changes that
5311 added, removed or "modified" the string) will be listed. This search can take a while and
5312 takes a lot of strain on the server, so please use it wisely.</dd>
5313 EOT
5314         }
5315         print "</dl>\n";
5316         git_footer_html();
5317 }
5318
5319 sub git_shortlog {
5320         my $head = git_get_head_hash($project);
5321         if (!defined $hash) {
5322                 $hash = $head;
5323         }
5324         if (!defined $page) {
5325                 $page = 0;
5326         }
5327         my $refs = git_get_references();
5328
5329         my @commitlist = parse_commits($hash, 101, (100 * $page));
5330
5331         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5332         my $next_link = '';
5333         if ($#commitlist >= 100) {
5334                 $next_link =
5335                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
5336                                  -accesskey => "n", -title => "Alt-n"}, "next");
5337         }
5338
5339         git_header_html();
5340         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5341         git_print_header_div('summary', $project);
5342
5343         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5344
5345         git_footer_html();
5346 }
5347
5348 ## ......................................................................
5349 ## feeds (RSS, Atom; OPML)
5350
5351 sub git_feed {
5352         my $format = shift || 'atom';
5353         my ($have_blame) = gitweb_check_feature('blame');
5354
5355         # Atom: http://www.atomenabled.org/developers/syndication/
5356         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5357         if ($format ne 'rss' && $format ne 'atom') {
5358                 die_error(undef, "Unknown web feed format");
5359         }
5360
5361         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5362         my $head = $hash || 'HEAD';
5363         my @commitlist = parse_commits($head, 150);
5364
5365         my %latest_commit;
5366         my %latest_date;
5367         my $content_type = "application/$format+xml";
5368         if (defined $cgi->http('HTTP_ACCEPT') &&
5369                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5370                 # browser (feed reader) prefers text/xml
5371                 $content_type = 'text/xml';
5372         }
5373         if (defined($commitlist[0])) {
5374                 %latest_commit = %{$commitlist[0]};
5375                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5376                 print $cgi->header(
5377                         -type => $content_type,
5378                         -charset => 'utf-8',
5379                         -last_modified => $latest_date{'rfc2822'});
5380         } else {
5381                 print $cgi->header(
5382                         -type => $content_type,
5383                         -charset => 'utf-8');
5384         }
5385
5386         # Optimization: skip generating the body if client asks only
5387         # for Last-Modified date.
5388         return if ($cgi->request_method() eq 'HEAD');
5389
5390         # header variables
5391         my $title = "$site_name - $project/$action";
5392         my $feed_type = 'log';
5393         if (defined $hash) {
5394                 $title .= " - '$hash'";
5395                 $feed_type = 'branch log';
5396                 if (defined $file_name) {
5397                         $title .= " :: $file_name";
5398                         $feed_type = 'history';
5399                 }
5400         } elsif (defined $file_name) {
5401                 $title .= " - $file_name";
5402                 $feed_type = 'history';
5403         }
5404         $title .= " $feed_type";
5405         my $descr = git_get_project_description($project);
5406         if (defined $descr) {
5407                 $descr = esc_html($descr);
5408         } else {
5409                 $descr = "$project " .
5410                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5411                          " feed";
5412         }
5413         my $owner = git_get_project_owner($project);
5414         $owner = esc_html($owner);
5415
5416         #header
5417         my $alt_url;
5418         if (defined $file_name) {
5419                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5420         } elsif (defined $hash) {
5421                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5422         } else {
5423                 $alt_url = href(-full=>1, action=>"summary");
5424         }
5425         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5426         if ($format eq 'rss') {
5427                 print <<XML;
5428 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5429 <channel>
5430 XML
5431                 print "<title>$title</title>\n" .
5432                       "<link>$alt_url</link>\n" .
5433                       "<description>$descr</description>\n" .
5434                       "<language>en</language>\n";
5435         } elsif ($format eq 'atom') {
5436                 print <<XML;
5437 <feed xmlns="http://www.w3.org/2005/Atom">
5438 XML
5439                 print "<title>$title</title>\n" .
5440                       "<subtitle>$descr</subtitle>\n" .
5441                       '<link rel="alternate" type="text/html" href="' .
5442                       $alt_url . '" />' . "\n" .
5443                       '<link rel="self" type="' . $content_type . '" href="' .
5444                       $cgi->self_url() . '" />' . "\n" .
5445                       "<id>" . href(-full=>1) . "</id>\n" .
5446                       # use project owner for feed author
5447                       "<author><name>$owner</name></author>\n";
5448                 if (defined $favicon) {
5449                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5450                 }
5451                 if (defined $logo_url) {
5452                         # not twice as wide as tall: 72 x 27 pixels
5453                         print "<logo>" . esc_url($logo) . "</logo>\n";
5454                 }
5455                 if (! %latest_date) {
5456                         # dummy date to keep the feed valid until commits trickle in:
5457                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5458                 } else {
5459                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5460                 }
5461         }
5462
5463         # contents
5464         for (my $i = 0; $i <= $#commitlist; $i++) {
5465                 my %co = %{$commitlist[$i]};
5466                 my $commit = $co{'id'};
5467                 # we read 150, we always show 30 and the ones more recent than 48 hours
5468                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5469                         last;
5470                 }
5471                 my %cd = parse_date($co{'author_epoch'});
5472
5473                 # get list of changed files
5474                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5475                         $co{'parent'} || "--root",
5476                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5477                         or next;
5478                 my @difftree = map { chomp; $_ } <$fd>;
5479                 close $fd
5480                         or next;
5481
5482                 # print element (entry, item)
5483                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
5484                 if ($format eq 'rss') {
5485                         print "<item>\n" .
5486                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5487                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5488                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5489                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5490                               "<link>$co_url</link>\n" .
5491                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5492                               "<content:encoded>" .
5493                               "<![CDATA[\n";
5494                 } elsif ($format eq 'atom') {
5495                         print "<entry>\n" .
5496                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5497                               "<updated>$cd{'iso-8601'}</updated>\n" .
5498                               "<author>\n" .
5499                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5500                         if ($co{'author_email'}) {
5501                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5502                         }
5503                         print "</author>\n" .
5504                               # use committer for contributor
5505                               "<contributor>\n" .
5506                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5507                         if ($co{'committer_email'}) {
5508                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5509                         }
5510                         print "</contributor>\n" .
5511                               "<published>$cd{'iso-8601'}</published>\n" .
5512                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5513                               "<id>$co_url</id>\n" .
5514                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5515                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5516                 }
5517                 my $comment = $co{'comment'};
5518                 print "<pre>\n";
5519                 foreach my $line (@$comment) {
5520                         $line = esc_html($line);
5521                         print "$line\n";
5522                 }
5523                 print "</pre><ul>\n";
5524                 foreach my $difftree_line (@difftree) {
5525                         my %difftree = parse_difftree_raw_line($difftree_line);
5526                         next if !$difftree{'from_id'};
5527
5528                         my $file = $difftree{'file'} || $difftree{'to_file'};
5529
5530                         print "<li>" .
5531                               "[" .
5532                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5533                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5534                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5535                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5536                                       -title => "diff"}, 'D');
5537                         if ($have_blame) {
5538                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5539                                                              file_name=>$file, hash_base=>$commit),
5540                                               -title => "blame"}, 'B');
5541                         }
5542                         # if this is not a feed of a file history
5543                         if (!defined $file_name || $file_name ne $file) {
5544                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5545                                                              file_name=>$file, hash=>$commit),
5546                                               -title => "history"}, 'H');
5547                         }
5548                         $file = esc_path($file);
5549                         print "] ".
5550                               "$file</li>\n";
5551                 }
5552                 if ($format eq 'rss') {
5553                         print "</ul>]]>\n" .
5554                               "</content:encoded>\n" .
5555                               "</item>\n";
5556                 } elsif ($format eq 'atom') {
5557                         print "</ul>\n</div>\n" .
5558                               "</content>\n" .
5559                               "</entry>\n";
5560                 }
5561         }
5562
5563         # end of feed
5564         if ($format eq 'rss') {
5565                 print "</channel>\n</rss>\n";
5566         }       elsif ($format eq 'atom') {
5567                 print "</feed>\n";
5568         }
5569 }
5570
5571 sub git_rss {
5572         git_feed('rss');
5573 }
5574
5575 sub git_atom {
5576         git_feed('atom');
5577 }
5578
5579 sub git_opml {
5580         my @list = git_get_projects_list();
5581
5582         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5583         print <<XML;
5584 <?xml version="1.0" encoding="utf-8"?>
5585 <opml version="1.0">
5586 <head>
5587   <title>$site_name OPML Export</title>
5588 </head>
5589 <body>
5590 <outline text="git RSS feeds">
5591 XML
5592
5593         foreach my $pr (@list) {
5594                 my %proj = %$pr;
5595                 my $head = git_get_head_hash($proj{'path'});
5596                 if (!defined $head) {
5597                         next;
5598                 }
5599                 $git_dir = "$projectroot/$proj{'path'}";
5600                 my %co = parse_commit($head);
5601                 if (!%co) {
5602                         next;
5603                 }
5604
5605                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5606                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5607                 my $html = "$my_url?p=$proj{'path'};a=summary";
5608                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5609         }
5610         print <<XML;
5611 </outline>
5612 </body>
5613 </opml>
5614 XML
5615 }