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