gitweb/gitweb.perl

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