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