gitweb/gitweb.cgi

   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 = "1.5.5.6";
  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 = "/usr/bin/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "/git/";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = 2007;
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = $ENV{'SERVER_NAME'} ? "git://" . $ENV{'SERVER_NAME'} : "projects";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "@SITENAME@"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "";
  55 # html text to include at home page
  56 our $home_text = "indextext.html";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("gitweb.css");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "img/@LOGO@.png";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "img/@FAVICON@.png";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "@LOGOURL@";
  73 our $logo_label = "@LOGOLABEL@";
  74
  75 # source of projects list
  76 our $projects_list = "";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("");
  95
  96 @git_base_url_list = (
  97         "@GITURL@"
  98 );
  99
 100
 101 # default blob_plain mimetype and default charset for text/plain blob
 102 our $default_blob_plain_mimetype = 'text/plain';
 103 our $default_text_plain_charset  = undef;
 104
 105 # file to use for guessing MIME types before trying /etc/mime.types
 106 # (relative to the current git repository)
 107 our $mimetypes_file = undef;
 108
 109 # assume this charset if line contains non-UTF-8 characters;
 110 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 111 # for which encoding all byte sequences are valid, for example
 112 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 113 # could be even 'utf-8' for the old behavior)
 114 our $fallback_encoding = 'latin1';
 115
 116 # rename detection options for git-diff and git-diff-tree
 117 # - default is '-M', with the cost proportional to
 118 #   (number of removed files) * (number of new files).
 119 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 120 #   (number of changed files + number of removed files) * (number of new files)
 121 # - even more costly is '-C', '--find-copies-harder' with cost
 122 #   (number of files in the original tree) * (number of new files)
 123 # - one might want to include '-B' option, e.g. '-B', '-M'
 124 our @diff_opts = ('-M'); # taken from git_commit
 125
 126 # information about snapshot formats that gitweb is capable of serving
 127 our %known_snapshot_formats = (
 128         # name => {
 129         #       'display' => display name,
 130         #       'type' => mime type,
 131         #       'suffix' => filename suffix,
 132         #       'format' => --format for git-archive,
 133         #       'compressor' => [compressor command and arguments]
 134         #                       (array reference, optional)}
 135         #
 136         'tgz' => {
 137                 'display' => 'tar.gz',
 138                 'type' => 'application/x-gzip',
 139                 'suffix' => '.tar.gz',
 140                 'format' => 'tar',
 141                 'compressor' => ['gzip']},
 142
 143         'tbz2' => {
 144                 'display' => 'tar.bz2',
 145                 'type' => 'application/x-bzip2',
 146                 'suffix' => '.tar.bz2',
 147                 'format' => 'tar',
 148                 'compressor' => ['bzip2']},
 149
 150         'zip' => {
 151                 'display' => 'zip',
 152                 'type' => 'application/x-zip',
 153                 'suffix' => '.zip',
 154                 'format' => 'zip'},
 155 );
 156
 157 # Aliases so we understand old gitweb.snapshot values in repository
 158 # configuration.
 159 our %known_snapshot_format_aliases = (
 160         'gzip'  => 'tgz',
 161         'bzip2' => 'tbz2',
 162
 163         # backward compatibility: legacy gitweb config support
 164         'x-gzip' => undef, 'gz' => undef,
 165         'x-bzip2' => undef, 'bz2' => undef,
 166         'x-zip' => undef, '' => undef,
 167 );
 168
 169 # You define site-wide feature defaults here; override them with
 170 # $GITWEB_CONFIG as necessary.
 171 our %feature = (
 172         # feature => {
 173         #       'sub' => feature-sub (subroutine),
 174         #       'override' => allow-override (boolean),
 175         #       'default' => [ default options...] (array reference)}
 176         #
 177         # if feature is overridable (it means that allow-override has true value),
 178         # then feature-sub will be called with default options as parameters;
 179         # return value of feature-sub indicates if to enable specified feature
 180         #
 181         # if there is no 'sub' key (no feature-sub), then feature cannot be
 182         # overriden
 183         #
 184         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 185
 186         # Enable the 'blame' blob view, showing the last commit that modified
 187         # each line in the file. This can be very CPU-intensive.
 188
 189         # To enable system wide have in $GITWEB_CONFIG
 190         # $feature{'blame'}{'default'} = [1];
 191         # To have project specific config enable override in $GITWEB_CONFIG
 192         # $feature{'blame'}{'override'} = 1;
 193         # and in project config gitweb.blame = 0|1;
 194         'blame' => {
 195                 'sub' => \&feature_blame,
 196                 'override' => 0,
 197                 'default' => [0]},
 198
 199         # Enable the 'snapshot' link, providing a compressed archive of any
 200         # tree. This can potentially generate high traffic if you have large
 201         # project.
 202
 203         # Value is a list of formats defined in %known_snapshot_formats that
 204         # you wish to offer.
 205         # To disable system wide have in $GITWEB_CONFIG
 206         # $feature{'snapshot'}{'default'} = [];
 207         # To have project specific config enable override in $GITWEB_CONFIG
 208         # $feature{'snapshot'}{'override'} = 1;
 209         # and in project config, a comma-separated list of formats or "none"
 210         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 211         'snapshot' => {
 212                 'sub' => \&feature_snapshot,
 213                 'override' => 0,
 214                 'default' => ['tgz']},
 215
 216         # Enable text search, which will list the commits which match author,
 217         # committer or commit text to a given string.  Enabled by default.
 218         # Project specific override is not supported.
 219         'search' => {
 220                 'override' => 0,
 221                 'default' => [1]},
 222
 223         # Enable grep search, which will list the files in currently selected
 224         # tree containing the given string. Enabled by default. This can be
 225         # potentially CPU-intensive, of course.
 226
 227         # To enable system wide have in $GITWEB_CONFIG
 228         # $feature{'grep'}{'default'} = [1];
 229         # To have project specific config enable override in $GITWEB_CONFIG
 230         # $feature{'grep'}{'override'} = 1;
 231         # and in project config gitweb.grep = 0|1;
 232         'grep' => {
 233                 'override' => 0,
 234                 'default' => [1]},
 235
 236         # Enable the pickaxe search, which will list the commits that modified
 237         # a given string in a file. This can be practical and quite faster
 238         # alternative to 'blame', but still potentially CPU-intensive.
 239
 240         # To enable system wide have in $GITWEB_CONFIG
 241         # $feature{'pickaxe'}{'default'} = [1];
 242         # To have project specific config enable override in $GITWEB_CONFIG
 243         # $feature{'pickaxe'}{'override'} = 1;
 244         # and in project config gitweb.pickaxe = 0|1;
 245         'pickaxe' => {
 246                 'sub' => \&feature_pickaxe,
 247                 'override' => 0,
 248                 'default' => [1]},
 249
 250         # Make gitweb use an alternative format of the URLs which can be
 251         # more readable and natural-looking: project name is embedded
 252         # directly in the path and the query string contains other
 253         # auxiliary information. All gitweb installations recognize
 254         # URL in either format; this configures in which formats gitweb
 255         # generates links.
 256
 257         # To enable system wide have in $GITWEB_CONFIG
 258         # $feature{'pathinfo'}{'default'} = [1];
 259         # Project specific override is not supported.
 260
 261         # Note that you will need to change the default location of CSS,
 262         # favicon, logo and possibly other files to an absolute URL. Also,
 263         # if gitweb.cgi serves as your indexfile, you will need to force
 264         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 265         'pathinfo' => {
 266                 'override' => 0,
 267                 'default' => [0]},
 268
 269         # Make gitweb consider projects in project root subdirectories
 270         # to be forks of existing projects. Given project $projname.git,
 271         # projects matching $projname/*.git will not be shown in the main
 272         # projects list, instead a '+' mark will be added to $projname
 273         # there and a 'forks' view will be enabled for the project, listing
 274         # all the forks. If project list is taken from a file, forks have
 275         # to be listed after the main project.
 276
 277         # To enable system wide have in $GITWEB_CONFIG
 278         # $feature{'forks'}{'default'} = [1];
 279         # Project specific override is not supported.
 280         'forks' => {
 281                 'override' => 0,
 282                 'default' => [0]},
 283 );
 284
 285 sub gitweb_check_feature {
 286         my ($name) = @_;
 287         return unless exists $feature{$name};
 288         my ($sub, $override, @defaults) = (
 289                 $feature{$name}{'sub'},
 290                 $feature{$name}{'override'},
 291                 @{$feature{$name}{'default'}});
 292         if (!$override) { return @defaults; }
 293         if (!defined $sub) {
 294                 warn "feature $name is not overrideable";
 295                 return @defaults;
 296         }
 297         return $sub->(@defaults);
 298 }
 299
 300 sub feature_blame {
 301         my ($val) = git_get_project_config('blame', '--bool');
 302
 303         if ($val eq 'true') {
 304                 return 1;
 305         } elsif ($val eq 'false') {
 306                 return 0;
 307         }
 308
 309         return $_[0];
 310 }
 311
 312 sub feature_snapshot {
 313         my (@fmts) = @_;
 314
 315         my ($val) = git_get_project_config('snapshot');
 316
 317         if ($val) {
 318                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 319         }
 320
 321         return @fmts;
 322 }
 323
 324 sub feature_grep {
 325         my ($val) = git_get_project_config('grep', '--bool');
 326
 327         if ($val eq 'true') {
 328                 return (1);
 329         } elsif ($val eq 'false') {
 330                 return (0);
 331         }
 332
 333         return ($_[0]);
 334 }
 335
 336 sub feature_pickaxe {
 337         my ($val) = git_get_project_config('pickaxe', '--bool');
 338
 339         if ($val eq 'true') {
 340                 return (1);
 341         } elsif ($val eq 'false') {
 342                 return (0);
 343         }
 344
 345         return ($_[0]);
 346 }
 347
 348 # checking HEAD file with -e is fragile if the repository was
 349 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 350 # and then pruned.
 351 sub check_head_link {
 352         my ($dir) = @_;
 353         my $headfile = "$dir/HEAD";
 354         return ((-e $headfile) ||
 355                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 356 }
 357
 358 sub check_export_ok {
 359         my ($dir) = @_;
 360         return (check_head_link($dir) &&
 361                 (!$export_ok || -e "$dir/$export_ok"));
 362 }
 363
 364 # process alternate names for backward compatibility
 365 # filter out unsupported (unknown) snapshot formats
 366 sub filter_snapshot_fmts {
 367         my @fmts = @_;
 368
 369         @fmts = map {
 370                 exists $known_snapshot_format_aliases{$_} ?
 371                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 372         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 373
 374 }
 375
 376 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "gitweb_config.perl";
 377 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 378
 379 # version of the core git binary
 380 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(undef, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(undef, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(undef, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(undef, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(undef, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(undef, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(undef, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(undef, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(undef, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(undef, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(undef, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(undef, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(undef, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_blame2,
 543         "blobdiff" => \&git_blobdiff,
 544         "blobdiff_plain" => \&git_blobdiff_plain,
 545         "blob" => \&git_blob,
 546         "blob_plain" => \&git_blob_plain,
 547         "commitdiff" => \&git_commitdiff,
 548         "commitdiff_plain" => \&git_commitdiff_plain,
 549         "commit" => \&git_commit,
 550         "forks" => \&git_forks,
 551         "heads" => \&git_heads,
 552         "history" => \&git_history,
 553         "log" => \&git_log,
 554         "rss" => \&git_rss,
 555         "atom" => \&git_atom,
 556         "search" => \&git_search,
 557         "search_help" => \&git_search_help,
 558         "shortlog" => \&git_shortlog,
 559         "summary" => \&git_summary,
 560         "tag" => \&git_tag,
 561         "tags" => \&git_tags,
 562         "tree" => \&git_tree,
 563         "snapshot" => \&git_snapshot,
 564         "object" => \&git_object,
 565         # those below don't need $project
 566         "opml" => \&git_opml,
 567         "project_list" => \&git_project_list,
 568         "project_index" => \&git_project_index,
 569 );
 570
 571 if (!defined $action) {
 572         if (defined $hash) {
 573                 $action = git_get_type($hash);
 574         } elsif (defined $hash_base && defined $file_name) {
 575                 $action = git_get_type("$hash_base:$file_name");
 576         } elsif (defined $project) {
 577                 $action = 'summary';
 578         } else {
 579                 $action = 'project_list';
 580         }
 581 }
 582 if (!defined($actions{$action})) {
 583         die_error(undef, "Unknown action");
 584 }
 585 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 586     !$project) {
 587         die_error(undef, "Project needed");
 588 }
 589 $actions{$action}->();
 590 exit;
 591
 592 ## ======================================================================
 593 ## action links
 594
 595 sub href(%) {
 596         my %params = @_;
 597         # default is to use -absolute url() i.e. $my_uri
 598         my $href = $params{-full} ? $my_url : $my_uri;
 599
 600         # XXX: Warning: If you touch this, check the search form for updating,
 601         # too.
 602
 603         my @mapping = (
 604                 project => "p",
 605                 action => "a",
 606                 file_name => "f",
 607                 file_parent => "fp",
 608                 hash => "h",
 609                 hash_parent => "hp",
 610                 hash_base => "hb",
 611                 hash_parent_base => "hpb",
 612                 page => "pg",
 613                 order => "o",
 614                 searchtext => "s",
 615                 searchtype => "st",
 616                 snapshot_format => "sf",
 617                 extra_options => "opt",
 618                 search_use_regexp => "sr",
 619         );
 620         my %mapping = @mapping;
 621
 622         $params{'project'} = $project unless exists $params{'project'};
 623
 624         if ($params{-replay}) {
 625                 while (my ($name, $symbol) = each %mapping) {
 626                         if (!exists $params{$name}) {
 627                                 # to allow for multivalued params we use arrayref form
 628                                 $params{$name} = [ $cgi->param($symbol) ];
 629                         }
 630                 }
 631         }
 632
 633         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 634         if ($use_pathinfo) {
 635                 # use PATH_INFO for project name
 636                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # allow only $len chars, but don't cut a word if it would fit in $add_len
 870         # if it doesn't fit, cut it if it's still longer than the dots we would add
 871         # remove chopped character entities entirely
 872
 873         # when chopping in the middle, distribute $len into left and right part
 874         # return early if chopping wouldn't make string shorter
 875         if ($where eq 'center') {
 876                 return $str if ($len + 5 >= length($str)); # filler is length 5
 877                 $len = int($len/2);
 878         } else {
 879                 return $str if ($len + 4 >= length($str)); # filler is length 4
 880         }
 881
 882         # regexps: ending and beginning with word part up to $add_len
 883         my $endre = qr/.{$len}\w{0,$add_len}/;
 884         my $begre = qr/\w{0,$add_len}.{$len}/;
 885
 886         if ($where eq 'left') {
 887                 $str =~ m/^(.*?)($begre)$/;
 888                 my ($lead, $body) = ($1, $2);
 889                 if (length($lead) > 4) {
 890                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 891                         $lead = " ...";
 892                 }
 893                 return "$lead$body";
 894
 895         } elsif ($where eq 'center') {
 896                 $str =~ m/^($endre)(.*)$/;
 897                 my ($left, $str)  = ($1, $2);
 898                 $str =~ m/^(.*?)($begre)$/;
 899                 my ($mid, $right) = ($1, $2);
 900                 if (length($mid) > 5) {
 901                         $left  =~ s/&[^;]*$//;
 902                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 903                         $mid = " ... ";
 904                 }
 905                 return "$left$mid$right";
 906
 907         } else {
 908                 $str =~ m/^($endre)(.*)$/;
 909                 my $body = $1;
 910                 my $tail = $2;
 911                 if (length($tail) > 4) {
 912                         $body =~ s/&[^;]*$//;
 913                         $tail = "... ";
 914                 }
 915                 return "$body$tail";
 916         }
 917 }
 918
 919 # takes the same arguments as chop_str, but also wraps a <span> around the
 920 # result with a title attribute if it does get chopped. Additionally, the
 921 # string is HTML-escaped.
 922 sub chop_and_escape_str {
 923         my ($str) = @_;
 924
 925         my $chopped = chop_str(@_);
 926         if ($chopped eq $str) {
 927                 return esc_html($chopped);
 928         } else {
 929                 $str =~ s/([[:cntrl:]])/?/g;
 930                 return $cgi->span({-title=>$str}, esc_html($chopped));
 931         }
 932 }
 933
 934 ## ----------------------------------------------------------------------
 935 ## functions returning short strings
 936
 937 # CSS class for given age value (in seconds)
 938 sub age_class {
 939         my $age = shift;
 940
 941         if (!defined $age) {
 942                 return "noage";
 943         } elsif ($age < 60*60*2) {
 944                 return "age0";
 945         } elsif ($age < 60*60*24*2) {
 946                 return "age1";
 947         } else {
 948                 return "age2";
 949         }
 950 }
 951
 952 # convert age in seconds to "nn units ago" string
 953 sub age_string {
 954         my $age = shift;
 955         my $age_str;
 956
 957         if ($age > 60*60*24*365*2) {
 958                 $age_str = (int $age/60/60/24/365);
 959                 $age_str .= " years ago";
 960         } elsif ($age > 60*60*24*(365/12)*2) {
 961                 $age_str = int $age/60/60/24/(365/12);
 962                 $age_str .= " months ago";
 963         } elsif ($age > 60*60*24*7*2) {
 964                 $age_str = int $age/60/60/24/7;
 965                 $age_str .= " weeks ago";
 966         } elsif ($age > 60*60*24*2) {
 967                 $age_str = int $age/60/60/24;
 968                 $age_str .= " days ago";
 969         } elsif ($age > 60*60*2) {
 970                 $age_str = int $age/60/60;
 971                 $age_str .= " hours ago";
 972         } elsif ($age > 60*2) {
 973                 $age_str = int $age/60;
 974                 $age_str .= " min ago";
 975         } elsif ($age > 2) {
 976                 $age_str = int $age;
 977                 $age_str .= " sec ago";
 978         } else {
 979                 $age_str .= " right now";
 980         }
 981         return $age_str;
 982 }
 983
 984 use constant {
 985         S_IFINVALID => 0030000,
 986         S_IFGITLINK => 0160000,
 987 };
 988
 989 # submodule/subproject, a commit object reference
 990 sub S_ISGITLINK($) {
 991         my $mode = shift;
 992
 993         return (($mode & S_IFMT) == S_IFGITLINK)
 994 }
 995
 996 # convert file mode in octal to symbolic file mode string
 997 sub mode_str {
 998         my $mode = oct shift;
 999
1000         if (S_ISGITLINK($mode)) {
1001                 return 'm---------';
1002         } elsif (S_ISDIR($mode & S_IFMT)) {
1003                 return 'drwxr-xr-x';
1004         } elsif (S_ISLNK($mode)) {
1005                 return 'lrwxrwxrwx';
1006         } elsif (S_ISREG($mode)) {
1007                 # git cares only about the executable bit
1008                 if ($mode & S_IXUSR) {
1009                         return '-rwxr-xr-x';
1010                 } else {
1011                         return '-rw-r--r--';
1012                 };
1013         } else {
1014                 return '----------';
1015         }
1016 }
1017
1018 # convert file mode in octal to file type string
1019 sub file_type {
1020         my $mode = shift;
1021
1022         if ($mode !~ m/^[0-7]+$/) {
1023                 return $mode;
1024         } else {
1025                 $mode = oct $mode;
1026         }
1027
1028         if (S_ISGITLINK($mode)) {
1029                 return "submodule";
1030         } elsif (S_ISDIR($mode & S_IFMT)) {
1031                 return "directory";
1032         } elsif (S_ISLNK($mode)) {
1033                 return "symlink";
1034         } elsif (S_ISREG($mode)) {
1035                 return "file";
1036         } else {
1037                 return "unknown";
1038         }
1039 }
1040
1041 # convert file mode in octal to file type description string
1042 sub file_type_long {
1043         my $mode = shift;
1044
1045         if ($mode !~ m/^[0-7]+$/) {
1046                 return $mode;
1047         } else {
1048                 $mode = oct $mode;
1049         }
1050
1051         if (S_ISGITLINK($mode)) {
1052                 return "submodule";
1053         } elsif (S_ISDIR($mode & S_IFMT)) {
1054                 return "directory";
1055         } elsif (S_ISLNK($mode)) {
1056                 return "symlink";
1057         } elsif (S_ISREG($mode)) {
1058                 if ($mode & S_IXUSR) {
1059                         return "executable";
1060                 } else {
1061                         return "file";
1062                 };
1063         } else {
1064                 return "unknown";
1065         }
1066 }
1067
1068
1069 ## ----------------------------------------------------------------------
1070 ## functions returning short HTML fragments, or transforming HTML fragments
1071 ## which don't belong to other sections
1072
1073 # format line of commit message.
1074 sub format_log_line_html {
1075         my $line = shift;
1076
1077         $line = esc_html($line, -nbsp=>1);
1078         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1079                 my $hash_text = $1;
1080                 my $link =
1081                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1082                                 -class => "text"}, $hash_text);
1083                 $line =~ s/$hash_text/$link/;
1084         }
1085         return $line;
1086 }
1087
1088 # format marker of refs pointing to given object
1089 sub format_ref_marker {
1090         my ($refs, $id) = @_;
1091         my $markers = '';
1092
1093         if (defined $refs->{$id}) {
1094                 foreach my $ref (@{$refs->{$id}}) {
1095                         my ($type, $name) = qw();
1096                         # e.g. tags/v2.6.11 or heads/next
1097                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1098                                 $type = $1;
1099                                 $name = $2;
1100                         } else {
1101                                 $type = "ref";
1102                                 $name = $ref;
1103                         }
1104
1105                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1106                                     esc_html($name) . "</span>";
1107                 }
1108         }
1109
1110         if ($markers) {
1111                 return ' <span class="refs">'. $markers . '</span>';
1112         } else {
1113                 return "";
1114         }
1115 }
1116
1117 # format, perhaps shortened and with markers, title line
1118 sub format_subject_html {
1119         my ($long, $short, $href, $extra) = @_;
1120         $extra = '' unless defined($extra);
1121
1122         if (length($short) < length($long)) {
1123                 return $cgi->a({-href => $href, -class => "list subject",
1124                                 -title => to_utf8($long)},
1125                        esc_html($short) . $extra);
1126         } else {
1127                 return $cgi->a({-href => $href, -class => "list subject"},
1128                        esc_html($long)  . $extra);
1129         }
1130 }
1131
1132 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1133 sub format_git_diff_header_line {
1134         my $line = shift;
1135         my $diffinfo = shift;
1136         my ($from, $to) = @_;
1137
1138         if ($diffinfo->{'nparents'}) {
1139                 # combined diff
1140                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1141                 if ($to->{'href'}) {
1142                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1143                                          esc_path($to->{'file'}));
1144                 } else { # file was deleted (no href)
1145                         $line .= esc_path($to->{'file'});
1146                 }
1147         } else {
1148                 # "ordinary" diff
1149                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1150                 if ($from->{'href'}) {
1151                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1152                                          'a/' . esc_path($from->{'file'}));
1153                 } else { # file was added (no href)
1154                         $line .= 'a/' . esc_path($from->{'file'});
1155                 }
1156                 $line .= ' ';
1157                 if ($to->{'href'}) {
1158                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1159                                          'b/' . esc_path($to->{'file'}));
1160                 } else { # file was deleted
1161                         $line .= 'b/' . esc_path($to->{'file'});
1162                 }
1163         }
1164
1165         return "<div class=\"diff header\">$line</div>\n";
1166 }
1167
1168 # format extended diff header line, before patch itself
1169 sub format_extended_diff_header_line {
1170         my $line = shift;
1171         my $diffinfo = shift;
1172         my ($from, $to) = @_;
1173
1174         # match <path>
1175         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1176                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1177                                        esc_path($from->{'file'}));
1178         }
1179         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1180                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1181                                  esc_path($to->{'file'}));
1182         }
1183         # match single <mode>
1184         if ($line =~ m/\s(\d{6})$/) {
1185                 $line .= '<span class="info"> (' .
1186                          file_type_long($1) .
1187                          ')</span>';
1188         }
1189         # match <hash>
1190         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1191                 # can match only for combined diff
1192                 $line = 'index ';
1193                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1194                         if ($from->{'href'}[$i]) {
1195                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1196                                                   -class=>"hash"},
1197                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1198                         } else {
1199                                 $line .= '0' x 7;
1200                         }
1201                         # separator
1202                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1203                 }
1204                 $line .= '..';
1205                 if ($to->{'href'}) {
1206                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1207                                          substr($diffinfo->{'to_id'},0,7));
1208                 } else {
1209                         $line .= '0' x 7;
1210                 }
1211
1212         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1213                 # can match only for ordinary diff
1214                 my ($from_link, $to_link);
1215                 if ($from->{'href'}) {
1216                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1217                                              substr($diffinfo->{'from_id'},0,7));
1218                 } else {
1219                         $from_link = '0' x 7;
1220                 }
1221                 if ($to->{'href'}) {
1222                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1223                                            substr($diffinfo->{'to_id'},0,7));
1224                 } else {
1225                         $to_link = '0' x 7;
1226                 }
1227                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1228                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1229         }
1230
1231         return $line . "<br/>\n";
1232 }
1233
1234 # format from-file/to-file diff header
1235 sub format_diff_from_to_header {
1236         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1237         my $line;
1238         my $result = '';
1239
1240         $line = $from_line;
1241         #assert($line =~ m/^---/) if DEBUG;
1242         # no extra formatting for "^--- /dev/null"
1243         if (! $diffinfo->{'nparents'}) {
1244                 # ordinary (single parent) diff
1245                 if ($line =~ m!^--- "?a/!) {
1246                         if ($from->{'href'}) {
1247                                 $line = '--- a/' .
1248                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1249                                                 esc_path($from->{'file'}));
1250                         } else {
1251                                 $line = '--- a/' .
1252                                         esc_path($from->{'file'});
1253                         }
1254                 }
1255                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1256
1257         } else {
1258                 # combined diff (merge commit)
1259                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1260                         if ($from->{'href'}[$i]) {
1261                                 $line = '--- ' .
1262                                         $cgi->a({-href=>href(action=>"blobdiff",
1263                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1264                                                              hash_parent_base=>$parents[$i],
1265                                                              file_parent=>$from->{'file'}[$i],
1266                                                              hash=>$diffinfo->{'to_id'},
1267                                                              hash_base=>$hash,
1268                                                              file_name=>$to->{'file'}),
1269                                                  -class=>"path",
1270                                                  -title=>"diff" . ($i+1)},
1271                                                 $i+1) .
1272                                         '/' .
1273                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1274                                                 esc_path($from->{'file'}[$i]));
1275                         } else {
1276                                 $line = '--- /dev/null';
1277                         }
1278                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1279                 }
1280         }
1281
1282         $line = $to_line;
1283         #assert($line =~ m/^\+\+\+/) if DEBUG;
1284         # no extra formatting for "^+++ /dev/null"
1285         if ($line =~ m!^\+\+\+ "?b/!) {
1286                 if ($to->{'href'}) {
1287                         $line = '+++ b/' .
1288                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1289                                         esc_path($to->{'file'}));
1290                 } else {
1291                         $line = '+++ b/' .
1292                                 esc_path($to->{'file'});
1293                 }
1294         }
1295         $result .= qq!<div class="diff to_file">$line</div>\n!;
1296
1297         return $result;
1298 }
1299
1300 # create note for patch simplified by combined diff
1301 sub format_diff_cc_simplified {
1302         my ($diffinfo, @parents) = @_;
1303         my $result = '';
1304
1305         $result .= "<div class=\"diff header\">" .
1306                    "diff --cc ";
1307         if (!is_deleted($diffinfo)) {
1308                 $result .= $cgi->a({-href => href(action=>"blob",
1309                                                   hash_base=>$hash,
1310                                                   hash=>$diffinfo->{'to_id'},
1311                                                   file_name=>$diffinfo->{'to_file'}),
1312                                     -class => "path"},
1313                                    esc_path($diffinfo->{'to_file'}));
1314         } else {
1315                 $result .= esc_path($diffinfo->{'to_file'});
1316         }
1317         $result .= "</div>\n" . # class="diff header"
1318                    "<div class=\"diff nodifferences\">" .
1319                    "Simple merge" .
1320                    "</div>\n"; # class="diff nodifferences"
1321
1322         return $result;
1323 }
1324
1325 # format patch (diff) line (not to be used for diff headers)
1326 sub format_diff_line {
1327         my $line = shift;
1328         my ($from, $to) = @_;
1329         my $diff_class = "";
1330
1331         chomp $line;
1332
1333         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1334                 # combined diff
1335                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1336                 if ($line =~ m/^\@{3}/) {
1337                         $diff_class = " chunk_header";
1338                 } elsif ($line =~ m/^\\/) {
1339                         $diff_class = " incomplete";
1340                 } elsif ($prefix =~ tr/+/+/) {
1341                         $diff_class = " add";
1342                 } elsif ($prefix =~ tr/-/-/) {
1343                         $diff_class = " rem";
1344                 }
1345         } else {
1346                 # assume ordinary diff
1347                 my $char = substr($line, 0, 1);
1348                 if ($char eq '+') {
1349                         $diff_class = " add";
1350                 } elsif ($char eq '-') {
1351                         $diff_class = " rem";
1352                 } elsif ($char eq '@') {
1353                         $diff_class = " chunk_header";
1354                 } elsif ($char eq "\\") {
1355                         $diff_class = " incomplete";
1356                 }
1357         }
1358         $line = untabify($line);
1359         if ($from && $to && $line =~ m/^\@{2} /) {
1360                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1361                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1362
1363                 $from_lines = 0 unless defined $from_lines;
1364                 $to_lines   = 0 unless defined $to_lines;
1365
1366                 if ($from->{'href'}) {
1367                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1368                                              -class=>"list"}, $from_text);
1369                 }
1370                 if ($to->{'href'}) {
1371                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1372                                              -class=>"list"}, $to_text);
1373                 }
1374                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1375                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1376                 return "<div class=\"diff$diff_class\">$line</div>\n";
1377         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1378                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1379                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1380
1381                 @from_text = split(' ', $ranges);
1382                 for (my $i = 0; $i < @from_text; ++$i) {
1383                         ($from_start[$i], $from_nlines[$i]) =
1384                                 (split(',', substr($from_text[$i], 1)), 0);
1385                 }
1386
1387                 $to_text   = pop @from_text;
1388                 $to_start  = pop @from_start;
1389                 $to_nlines = pop @from_nlines;
1390
1391                 $line = "<span class=\"chunk_info\">$prefix ";
1392                 for (my $i = 0; $i < @from_text; ++$i) {
1393                         if ($from->{'href'}[$i]) {
1394                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1395                                                   -class=>"list"}, $from_text[$i]);
1396                         } else {
1397                                 $line .= $from_text[$i];
1398                         }
1399                         $line .= " ";
1400                 }
1401                 if ($to->{'href'}) {
1402                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1403                                           -class=>"list"}, $to_text);
1404                 } else {
1405                         $line .= $to_text;
1406                 }
1407                 $line .= " $prefix</span>" .
1408                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1409                 return "<div class=\"diff$diff_class\">$line</div>\n";
1410         }
1411         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1412 }
1413
1414 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1415 # linked.  Pass the hash of the tree/commit to snapshot.
1416 sub format_snapshot_links {
1417         my ($hash) = @_;
1418         my @snapshot_fmts = gitweb_check_feature('snapshot');
1419         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1420         my $num_fmts = @snapshot_fmts;
1421         if ($num_fmts > 1) {
1422                 # A parenthesized list of links bearing format names.
1423                 # e.g. "snapshot (_tar.gz_ _zip_)"
1424                 return "snapshot (" . join(' ', map
1425                         $cgi->a({
1426                                 -href => href(
1427                                         action=>"snapshot",
1428                                         hash=>$hash,
1429                                         snapshot_format=>$_
1430                                 )
1431                         }, $known_snapshot_formats{$_}{'display'})
1432                 , @snapshot_fmts) . ")";
1433         } elsif ($num_fmts == 1) {
1434                 # A single "snapshot" link whose tooltip bears the format name.
1435                 # i.e. "_snapshot_"
1436                 my ($fmt) = @snapshot_fmts;
1437                 return
1438                         $cgi->a({
1439                                 -href => href(
1440                                         action=>"snapshot",
1441                                         hash=>$hash,
1442                                         snapshot_format=>$fmt
1443                                 ),
1444                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1445                         }, "tar");
1446         } else { # $num_fmts == 0
1447                 return undef;
1448         }
1449 }
1450
1451 ## ----------------------------------------------------------------------
1452 ## git utility subroutines, invoking git commands
1453
1454 # returns path to the core git executable and the --git-dir parameter as list
1455 sub git_cmd {
1456         return $GIT, '--git-dir='.$git_dir;
1457 }
1458
1459 # quote the given arguments for passing them to the shell
1460 # quote_command("command", "arg 1", "arg with ' and ! characters")
1461 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1462 # Try to avoid using this function wherever possible.
1463 sub quote_command {
1464         return join(' ',
1465                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1466 }
1467
1468 # get HEAD ref of given project as hash
1469 sub git_get_head_hash {
1470         my $project = shift;
1471         my $o_git_dir = $git_dir;
1472         my $retval = undef;
1473         $git_dir = "$projectroot/$project";
1474         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1475                 my $head = <$fd>;
1476                 close $fd;
1477                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1478                         $retval = $1;
1479                 }
1480         }
1481         if (defined $o_git_dir) {
1482                 $git_dir = $o_git_dir;
1483         }
1484         return $retval;
1485 }
1486
1487 # get type of given object
1488 sub git_get_type {
1489         my $hash = shift;
1490
1491         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1492         my $type = <$fd>;
1493         close $fd or return;
1494         chomp $type;
1495         return $type;
1496 }
1497
1498 # repository configuration
1499 our $config_file = '';
1500 our %config;
1501
1502 # store multiple values for single key as anonymous array reference
1503 # single values stored directly in the hash, not as [ <value> ]
1504 sub hash_set_multi {
1505         my ($hash, $key, $value) = @_;
1506
1507         if (!exists $hash->{$key}) {
1508                 $hash->{$key} = $value;
1509         } elsif (!ref $hash->{$key}) {
1510                 $hash->{$key} = [ $hash->{$key}, $value ];
1511         } else {
1512                 push @{$hash->{$key}}, $value;
1513         }
1514 }
1515
1516 # return hash of git project configuration
1517 # optionally limited to some section, e.g. 'gitweb'
1518 sub git_parse_project_config {
1519         my $section_regexp = shift;
1520         my %config;
1521
1522         local $/ = "\0";
1523
1524         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1525                 or return;
1526
1527         while (my $keyval = <$fh>) {
1528                 chomp $keyval;
1529                 my ($key, $value) = split(/\n/, $keyval, 2);
1530
1531                 hash_set_multi(\%config, $key, $value)
1532                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1533         }
1534         close $fh;
1535
1536         return %config;
1537 }
1538
1539 # convert config value to boolean, 'true' or 'false'
1540 # no value, number > 0, 'true' and 'yes' values are true
1541 # rest of values are treated as false (never as error)
1542 sub config_to_bool {
1543         my $val = shift;
1544
1545         # strip leading and trailing whitespace
1546         $val =~ s/^\s+//;
1547         $val =~ s/\s+$//;
1548
1549         return (!defined $val ||               # section.key
1550                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1551                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1552 }
1553
1554 # convert config value to simple decimal number
1555 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1556 # to be multiplied by 1024, 1048576, or 1073741824
1557 sub config_to_int {
1558         my $val = shift;
1559
1560         # strip leading and trailing whitespace
1561         $val =~ s/^\s+//;
1562         $val =~ s/\s+$//;
1563
1564         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1565                 $unit = lc($unit);
1566                 # unknown unit is treated as 1
1567                 return $num * ($unit eq 'g' ? 1073741824 :
1568                                $unit eq 'm' ?    1048576 :
1569                                $unit eq 'k' ?       1024 : 1);
1570         }
1571         return $val;
1572 }
1573
1574 # convert config value to array reference, if needed
1575 sub config_to_multi {
1576         my $val = shift;
1577
1578         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1579 }
1580
1581 sub git_get_project_config {
1582         my ($key, $type) = @_;
1583
1584         # key sanity check
1585         return unless ($key);
1586         $key =~ s/^gitweb\.//;
1587         return if ($key =~ m/\W/);
1588
1589         # type sanity check
1590         if (defined $type) {
1591                 $type =~ s/^--//;
1592                 $type = undef
1593                         unless ($type eq 'bool' || $type eq 'int');
1594         }
1595
1596         # get config
1597         if (!defined $config_file ||
1598             $config_file ne "$git_dir/config") {
1599                 %config = git_parse_project_config('gitweb');
1600                 $config_file = "$git_dir/config";
1601         }
1602
1603         # ensure given type
1604         if (!defined $type) {
1605                 return $config{"gitweb.$key"};
1606         } elsif ($type eq 'bool') {
1607                 # backward compatibility: 'git config --bool' returns true/false
1608                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1609         } elsif ($type eq 'int') {
1610                 return config_to_int($config{"gitweb.$key"});
1611         }
1612         return $config{"gitweb.$key"};
1613 }
1614
1615 # get hash of given path at given ref
1616 sub git_get_hash_by_path {
1617         my $base = shift;
1618         my $path = shift || return undef;
1619         my $type = shift;
1620
1621         $path =~ s,/+$,,;
1622
1623         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1624                 or die_error(undef, "Open git-ls-tree failed");
1625         my $line = <$fd>;
1626         close $fd or return undef;
1627
1628         if (!defined $line) {
1629                 # there is no tree or hash given by $path at $base
1630                 return undef;
1631         }
1632
1633         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1634         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1635         if (defined $type && $type ne $2) {
1636                 # type doesn't match
1637                 return undef;
1638         }
1639         return $3;
1640 }
1641
1642 # get path of entry with given hash at given tree-ish (ref)
1643 # used to get 'from' filename for combined diff (merge commit) for renames
1644 sub git_get_path_by_hash {
1645         my $base = shift || return;
1646         my $hash = shift || return;
1647
1648         local $/ = "\0";
1649
1650         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1651                 or return undef;
1652         while (my $line = <$fd>) {
1653                 chomp $line;
1654
1655                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1656                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1657                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1658                         close $fd;
1659                         return $1;
1660                 }
1661         }
1662         close $fd;
1663         return undef;
1664 }
1665
1666 ## ......................................................................
1667 ## git utility functions, directly accessing git repository
1668
1669 sub git_get_project_description {
1670         my $path = shift;
1671
1672         $git_dir = "$projectroot/$path";
1673         open my $fd, "$git_dir/description"
1674                 or return git_get_project_config('description');
1675         my $descr = <$fd>;
1676         close $fd;
1677         if (defined $descr) {
1678                 chomp $descr;
1679         }
1680         return $descr;
1681 }
1682
1683 sub git_get_project_url_list {
1684         my $path = shift;
1685
1686         $git_dir = "$projectroot/$path";
1687         open my $fd, "$git_dir/cloneurl"
1688                 or return wantarray ?
1689                 @{ config_to_multi(git_get_project_config('url')) } :
1690                    config_to_multi(git_get_project_config('url'));
1691         my @git_project_url_list = map { chomp; $_ } <$fd>;
1692         close $fd;
1693
1694         return wantarray ? @git_project_url_list : \@git_project_url_list;
1695 }
1696
1697 sub git_get_projects_list {
1698         my ($filter) = @_;
1699         my @list;
1700
1701         $filter ||= '';
1702         $filter =~ s/\.git$//;
1703
1704         my ($check_forks) = gitweb_check_feature('forks');
1705
1706         if (-d $projects_list) {
1707                 # search in directory
1708                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1709                 # remove the trailing "/"
1710                 $dir =~ s!/+$!!;
1711                 my $pfxlen = length("$dir");
1712                 my $pfxdepth = ($dir =~ tr!/!!);
1713
1714                 File::Find::find({
1715                         follow_fast => 1, # follow symbolic links
1716                         follow_skip => 2, # ignore duplicates
1717                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1718                         wanted => sub {
1719                                 # skip project-list toplevel, if we get it.
1720                                 return if (m!^[/.]$!);
1721                                 # only directories can be git repositories
1722                                 return unless (-d $_);
1723                                 # don't traverse too deep (Find is super slow on os x)
1724                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1725                                         $File::Find::prune = 1;
1726                                         return;
1727                                 }
1728
1729                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1730                                 # we check related file in $projectroot
1731                                 if ($check_forks and $subdir =~ m#/.#) {
1732                                         $File::Find::prune = 1;
1733                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1734                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1735                                         $File::Find::prune = 1;
1736                                 }
1737                         },
1738                 }, "$dir");
1739
1740         } elsif (-f $projects_list) {
1741                 # read from file(url-encoded):
1742                 # 'git%2Fgit.git Linus+Torvalds'
1743                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1744                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1745                 my %paths;
1746                 open my ($fd), $projects_list or return;
1747         PROJECT:
1748                 while (my $line = <$fd>) {
1749                         chomp $line;
1750                         my ($path, $owner) = split ' ', $line;
1751                         $path = unescape($path);
1752                         $owner = unescape($owner);
1753                         if (!defined $path) {
1754                                 next;
1755                         }
1756                         if ($filter ne '') {
1757                                 # looking for forks;
1758                                 my $pfx = substr($path, 0, length($filter));
1759                                 if ($pfx ne $filter) {
1760                                         next PROJECT;
1761                                 }
1762                                 my $sfx = substr($path, length($filter));
1763                                 if ($sfx !~ /^\/.*\.git$/) {
1764                                         next PROJECT;
1765                                 }
1766                         } elsif ($check_forks) {
1767                         PATH:
1768                                 foreach my $filter (keys %paths) {
1769                                         # looking for forks;
1770                                         my $pfx = substr($path, 0, length($filter));
1771                                         if ($pfx ne $filter) {
1772                                                 next PATH;
1773                                         }
1774                                         my $sfx = substr($path, length($filter));
1775                                         if ($sfx !~ /^\/.*\.git$/) {
1776                                                 next PATH;
1777                                         }
1778                                         # is a fork, don't include it in
1779                                         # the list
1780                                         next PROJECT;
1781                                 }
1782                         }
1783                         if (check_export_ok("$projectroot/$path")) {
1784                                 my $pr = {
1785                                         path => $path,
1786                                         owner => to_utf8($owner),
1787                                 };
1788                                 push @list, $pr;
1789                                 (my $forks_path = $path) =~ s/\.git$//;
1790                                 $paths{$forks_path}++;
1791                         }
1792                 }
1793                 close $fd;
1794         }
1795         return @list;
1796 }
1797
1798 our $gitweb_project_owner = undef;
1799 sub git_get_project_list_from_file {
1800
1801         return if (defined $gitweb_project_owner);
1802
1803         $gitweb_project_owner = {};
1804         # read from file (url-encoded):
1805         # 'git%2Fgit.git Linus+Torvalds'
1806         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1807         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1808         if (-f $projects_list) {
1809                 open (my $fd , $projects_list);
1810                 while (my $line = <$fd>) {
1811                         chomp $line;
1812                         my ($pr, $ow) = split ' ', $line;
1813                         $pr = unescape($pr);
1814                         $ow = unescape($ow);
1815                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1816                 }
1817                 close $fd;
1818         }
1819 }
1820
1821 sub git_get_project_owner {
1822         my $project = shift;
1823         my $owner;
1824
1825         return undef unless $project;
1826         $git_dir = "$projectroot/$project";
1827
1828         if (!defined $gitweb_project_owner) {
1829                 git_get_project_list_from_file();
1830         }
1831
1832         if (exists $gitweb_project_owner->{$project}) {
1833                 $owner = $gitweb_project_owner->{$project};
1834         }
1835         if (!defined $owner){
1836                 $owner = git_get_project_config('owner');
1837         }
1838         if (!defined $owner) {
1839                 $owner = get_file_owner("$git_dir");
1840         }
1841
1842         return $owner;
1843 }
1844
1845 sub git_get_last_activity {
1846         my ($path) = @_;
1847         my $fd;
1848
1849         $git_dir = "$projectroot/$path";
1850         open($fd, "-|", git_cmd(), 'for-each-ref',
1851              '--format=%(committer)',
1852              '--sort=-committerdate',
1853              '--count=1',
1854              'refs/heads') or return;
1855         my $most_recent = <$fd>;
1856         close $fd or return;
1857         if (defined $most_recent &&
1858             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1859                 my $timestamp = $1;
1860                 my $age = time - $timestamp;
1861                 return ($age, age_string($age));
1862         }
1863         return (undef, undef);
1864 }
1865
1866 sub git_get_references {
1867         my $type = shift || "";
1868         my %refs;
1869         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1870         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1871         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1872                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1873                 or return;
1874
1875         while (my $line = <$fd>) {
1876                 chomp $line;
1877                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1878                         if (defined $refs{$1}) {
1879                                 push @{$refs{$1}}, $2;
1880                         } else {
1881                                 $refs{$1} = [ $2 ];
1882                         }
1883                 }
1884         }
1885         close $fd or return;
1886         return \%refs;
1887 }
1888
1889 sub git_get_rev_name_tags {
1890         my $hash = shift || return undef;
1891
1892         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1893                 or return;
1894         my $name_rev = <$fd>;
1895         close $fd;
1896
1897         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1898                 return $1;
1899         } else {
1900                 # catches also '$hash undefined' output
1901                 return undef;
1902         }
1903 }
1904
1905 ## ----------------------------------------------------------------------
1906 ## parse to hash functions
1907
1908 sub parse_date {
1909         my $epoch = shift;
1910         my $tz = shift || "-0000";
1911
1912         my %date;
1913         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1914         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1915         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1916         $date{'hour'} = $hour;
1917         $date{'minute'} = $min;
1918         $date{'mday'} = $mday;
1919         $date{'day'} = $days[$wday];
1920         $date{'month'} = $months[$mon];
1921         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1922                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1923         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1924                              $mday, $months[$mon], $hour ,$min;
1925         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1926                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1927
1928         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1929         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1930         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1931         $date{'hour_local'} = $hour;
1932         $date{'minute_local'} = $min;
1933         $date{'tz_local'} = $tz;
1934         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1935                                   1900+$year, $mon+1, $mday,
1936                                   $hour, $min, $sec, $tz);
1937         return %date;
1938 }
1939
1940 sub parse_tag {
1941         my $tag_id = shift;
1942         my %tag;
1943         my @comment;
1944
1945         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1946         $tag{'id'} = $tag_id;
1947         while (my $line = <$fd>) {
1948                 chomp $line;
1949                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1950                         $tag{'object'} = $1;
1951                 } elsif ($line =~ m/^type (.+)$/) {
1952                         $tag{'type'} = $1;
1953                 } elsif ($line =~ m/^tag (.+)$/) {
1954                         $tag{'name'} = $1;
1955                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1956                         $tag{'author'} = $1;
1957                         $tag{'epoch'} = $2;
1958                         $tag{'tz'} = $3;
1959                 } elsif ($line =~ m/--BEGIN/) {
1960                         push @comment, $line;
1961                         last;
1962                 } elsif ($line eq "") {
1963                         last;
1964                 }
1965         }
1966         push @comment, <$fd>;
1967         $tag{'comment'} = \@comment;
1968         close $fd or return;
1969         if (!defined $tag{'name'}) {
1970                 return
1971         };
1972         return %tag
1973 }
1974
1975 sub parse_commit_text {
1976         my ($commit_text, $withparents) = @_;
1977         my @commit_lines = split '\n', $commit_text;
1978         my %co;
1979
1980         pop @commit_lines; # Remove '\0'
1981
1982         if (! @commit_lines) {
1983                 return;
1984         }
1985
1986         my $header = shift @commit_lines;
1987         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1988                 return;
1989         }
1990         ($co{'id'}, my @parents) = split ' ', $header;
1991         while (my $line = shift @commit_lines) {
1992                 last if $line eq "\n";
1993                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1994                         $co{'tree'} = $1;
1995                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1996                         push @parents, $1;
1997                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1998                         $co{'author'} = $1;
1999                         $co{'author_epoch'} = $2;
2000                         $co{'author_tz'} = $3;
2001                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2002                                 $co{'author_name'}  = $1;
2003                                 $co{'author_email'} = $2;
2004                         } else {
2005                                 $co{'author_name'} = $co{'author'};
2006                         }
2007                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2008                         $co{'committer'} = $1;
2009                         $co{'committer_epoch'} = $2;
2010                         $co{'committer_tz'} = $3;
2011                         $co{'committer_name'} = $co{'committer'};
2012                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2013                                 $co{'committer_name'}  = $1;
2014                                 $co{'committer_email'} = $2;
2015                         } else {
2016                                 $co{'committer_name'} = $co{'committer'};
2017                         }
2018                 }
2019         }
2020         if (!defined $co{'tree'}) {
2021                 return;
2022         };
2023         $co{'parents'} = \@parents;
2024         $co{'parent'} = $parents[0];
2025
2026         foreach my $title (@commit_lines) {
2027                 $title =~ s/^    //;
2028                 if ($title ne "") {
2029                         $co{'title'} = chop_str($title, 80, 5);
2030                         # remove leading stuff of merges to make the interesting part visible
2031                         if (length($title) > 50) {
2032                                 $title =~ s/^Automatic //;
2033                                 $title =~ s/^merge (of|with) /Merge ... /i;
2034                                 if (length($title) > 50) {
2035                                         $title =~ s/(http|rsync):\/\///;
2036                                 }
2037                                 if (length($title) > 50) {
2038                                         $title =~ s/(master|www|rsync)\.//;
2039                                 }
2040                                 if (length($title) > 50) {
2041                                         $title =~ s/kernel.org:?//;
2042                                 }
2043                                 if (length($title) > 50) {
2044                                         $title =~ s/\/pub\/scm//;
2045                                 }
2046                         }
2047                         $co{'title_short'} = chop_str($title, 50, 5);
2048                         last;
2049                 }
2050         }
2051         if ($co{'title'} eq "") {
2052                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2053         }
2054         # remove added spaces
2055         foreach my $line (@commit_lines) {
2056                 $line =~ s/^    //;
2057         }
2058         $co{'comment'} = \@commit_lines;
2059
2060         my $age = time - $co{'committer_epoch'};
2061         $co{'age'} = $age;
2062         $co{'age_string'} = age_string($age);
2063         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2064         if ($age > 60*60*24*7*2) {
2065                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2066                 $co{'age_string_age'} = $co{'age_string'};
2067         } else {
2068                 $co{'age_string_date'} = $co{'age_string'};
2069                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2070         }
2071         return %co;
2072 }
2073
2074 sub parse_commit {
2075         my ($commit_id) = @_;
2076         my %co;
2077
2078         local $/ = "\0";
2079
2080         open my $fd, "-|", git_cmd(), "rev-list",
2081                 "--parents",
2082                 "--header",
2083                 "--max-count=1",
2084                 $commit_id,
2085                 "--",
2086                 or die_error(undef, "Open git-rev-list failed");
2087         %co = parse_commit_text(<$fd>, 1);
2088         close $fd;
2089
2090         return %co;
2091 }
2092
2093 sub parse_commits {
2094         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2095         my @cos;
2096
2097         $maxcount ||= 1;
2098         $skip ||= 0;
2099
2100         local $/ = "\0";
2101
2102         open my $fd, "-|", git_cmd(), "rev-list",
2103                 "--header",
2104                 @args,
2105                 ("--max-count=" . $maxcount),
2106                 ("--skip=" . $skip),
2107                 @extra_options,
2108                 $commit_id,
2109                 "--",
2110                 ($filename ? ($filename) : ())
2111                 or die_error(undef, "Open git-rev-list failed");
2112         while (my $line = <$fd>) {
2113                 my %co = parse_commit_text($line);
2114                 push @cos, \%co;
2115         }
2116         close $fd;
2117
2118         return wantarray ? @cos : \@cos;
2119 }
2120
2121 # parse ref from ref_file, given by ref_id, with given type
2122 sub parse_ref {
2123         my $ref_file = shift;
2124         my $ref_id = shift;
2125         my $type = shift || git_get_type($ref_id);
2126         my %ref_item;
2127
2128         $ref_item{'type'} = $type;
2129         $ref_item{'id'} = $ref_id;
2130         $ref_item{'epoch'} = 0;
2131         $ref_item{'age'} = "unknown";
2132         if ($type eq "tag") {
2133                 my %tag = parse_tag($ref_id);
2134                 $ref_item{'comment'} = $tag{'comment'};
2135                 if ($tag{'type'} eq "commit") {
2136                         my %co = parse_commit($tag{'object'});
2137                         $ref_item{'epoch'} = $co{'committer_epoch'};
2138                         $ref_item{'age'} = $co{'age_string'};
2139                 } elsif (defined($tag{'epoch'})) {
2140                         my $age = time - $tag{'epoch'};
2141                         $ref_item{'epoch'} = $tag{'epoch'};
2142                         $ref_item{'age'} = age_string($age);
2143                 }
2144                 $ref_item{'reftype'} = $tag{'type'};
2145                 $ref_item{'name'} = $tag{'name'};
2146                 $ref_item{'refid'} = $tag{'object'};
2147         } elsif ($type eq "commit"){
2148                 my %co = parse_commit($ref_id);
2149                 $ref_item{'reftype'} = "commit";
2150                 $ref_item{'name'} = $ref_file;
2151                 $ref_item{'title'} = $co{'title'};
2152                 $ref_item{'refid'} = $ref_id;
2153                 $ref_item{'epoch'} = $co{'committer_epoch'};
2154                 $ref_item{'age'} = $co{'age_string'};
2155         } else {
2156                 $ref_item{'reftype'} = $type;
2157                 $ref_item{'name'} = $ref_file;
2158                 $ref_item{'refid'} = $ref_id;
2159         }
2160
2161         return %ref_item;
2162 }
2163
2164 # parse line of git-diff-tree "raw" output
2165 sub parse_difftree_raw_line {
2166         my $line = shift;
2167         my %res;
2168
2169         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2170         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2171         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2172                 $res{'from_mode'} = $1;
2173                 $res{'to_mode'} = $2;
2174                 $res{'from_id'} = $3;
2175                 $res{'to_id'} = $4;
2176                 $res{'status'} = $5;
2177                 $res{'similarity'} = $6;
2178                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2179                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2180                 } else {
2181                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2182                 }
2183         }
2184         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2185         # combined diff (for merge commit)
2186         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2187                 $res{'nparents'}  = length($1);
2188                 $res{'from_mode'} = [ split(' ', $2) ];
2189                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2190                 $res{'from_id'} = [ split(' ', $3) ];
2191                 $res{'to_id'} = pop @{$res{'from_id'}};
2192                 $res{'status'} = [ split('', $4) ];
2193                 $res{'to_file'} = unquote($5);
2194         }
2195         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2196         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2197                 $res{'commit'} = $1;
2198         }
2199
2200         return wantarray ? %res : \%res;
2201 }
2202
2203 # wrapper: return parsed line of git-diff-tree "raw" output
2204 # (the argument might be raw line, or parsed info)
2205 sub parsed_difftree_line {
2206         my $line_or_ref = shift;
2207
2208         if (ref($line_or_ref) eq "HASH") {
2209                 # pre-parsed (or generated by hand)
2210                 return $line_or_ref;
2211         } else {
2212                 return parse_difftree_raw_line($line_or_ref);
2213         }
2214 }
2215
2216 # parse line of git-ls-tree output
2217 sub parse_ls_tree_line ($;%) {
2218         my $line = shift;
2219         my %opts = @_;
2220         my %res;
2221
2222         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2223         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2224
2225         $res{'mode'} = $1;
2226         $res{'type'} = $2;
2227         $res{'hash'} = $3;
2228         if ($opts{'-z'}) {
2229                 $res{'name'} = $4;
2230         } else {
2231                 $res{'name'} = unquote($4);
2232         }
2233
2234         return wantarray ? %res : \%res;
2235 }
2236
2237 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2238 sub parse_from_to_diffinfo {
2239         my ($diffinfo, $from, $to, @parents) = @_;
2240
2241         if ($diffinfo->{'nparents'}) {
2242                 # combined diff
2243                 $from->{'file'} = [];
2244                 $from->{'href'} = [];
2245                 fill_from_file_info($diffinfo, @parents)
2246                         unless exists $diffinfo->{'from_file'};
2247                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2248                         $from->{'file'}[$i] =
2249                                 defined $diffinfo->{'from_file'}[$i] ?
2250                                         $diffinfo->{'from_file'}[$i] :
2251                                         $diffinfo->{'to_file'};
2252                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2253                                 $from->{'href'}[$i] = href(action=>"blob",
2254                                                            hash_base=>$parents[$i],
2255                                                            hash=>$diffinfo->{'from_id'}[$i],
2256                                                            file_name=>$from->{'file'}[$i]);
2257                         } else {
2258                                 $from->{'href'}[$i] = undef;
2259                         }
2260                 }
2261         } else {
2262                 # ordinary (not combined) diff
2263                 $from->{'file'} = $diffinfo->{'from_file'};
2264                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2265                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2266                                                hash=>$diffinfo->{'from_id'},
2267                                                file_name=>$from->{'file'});
2268                 } else {
2269                         delete $from->{'href'};
2270                 }
2271         }
2272
2273         $to->{'file'} = $diffinfo->{'to_file'};
2274         if (!is_deleted($diffinfo)) { # file exists in result
2275                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2276                                      hash=>$diffinfo->{'to_id'},
2277                                      file_name=>$to->{'file'});
2278         } else {
2279                 delete $to->{'href'};
2280         }
2281 }
2282
2283 ## ......................................................................
2284 ## parse to array of hashes functions
2285
2286 sub git_get_heads_list {
2287         my $limit = shift;
2288         my @headslist;
2289
2290         open my $fd, '-|', git_cmd(), 'for-each-ref',
2291                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2292                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2293                 'refs/heads'
2294                 or return;
2295         while (my $line = <$fd>) {
2296                 my %ref_item;
2297
2298                 chomp $line;
2299                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2300                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2301                 my ($committer, $epoch, $tz) =
2302                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2303                 $ref_item{'fullname'}  = $name;
2304                 $name =~ s!^refs/heads/!!;
2305
2306                 $ref_item{'name'}  = $name;
2307                 $ref_item{'id'}    = $hash;
2308                 $ref_item{'title'} = $title || '(no commit message)';
2309                 $ref_item{'epoch'} = $epoch;
2310                 if ($epoch) {
2311                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2312                 } else {
2313                         $ref_item{'age'} = "unknown";
2314                 }
2315
2316                 push @headslist, \%ref_item;
2317         }
2318         close $fd;
2319
2320         return wantarray ? @headslist : \@headslist;
2321 }
2322
2323 sub git_get_tags_list {
2324         my $limit = shift;
2325         my @tagslist;
2326
2327         open my $fd, '-|', git_cmd(), 'for-each-ref',
2328                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2329                 '--format=%(objectname) %(objecttype) %(refname) '.
2330                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2331                 'refs/tags'
2332                 or return;
2333         while (my $line = <$fd>) {
2334                 my %ref_item;
2335
2336                 chomp $line;
2337                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2338                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2339                 my ($creator, $epoch, $tz) =
2340                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2341                 $ref_item{'fullname'} = $name;
2342                 $name =~ s!^refs/tags/!!;
2343
2344                 $ref_item{'type'} = $type;
2345                 $ref_item{'id'} = $id;
2346                 $ref_item{'name'} = $name;
2347                 if ($type eq "tag") {
2348                         $ref_item{'subject'} = $title;
2349                         $ref_item{'reftype'} = $reftype;
2350                         $ref_item{'refid'}   = $refid;
2351                 } else {
2352                         $ref_item{'reftype'} = $type;
2353                         $ref_item{'refid'}   = $id;
2354                 }
2355
2356                 if ($type eq "tag" || $type eq "commit") {
2357                         $ref_item{'epoch'} = $epoch;
2358                         if ($epoch) {
2359                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2360                         } else {
2361                                 $ref_item{'age'} = "unknown";
2362                         }
2363                 }
2364
2365                 push @tagslist, \%ref_item;
2366         }
2367         close $fd;
2368
2369         return wantarray ? @tagslist : \@tagslist;
2370 }
2371
2372 ## ----------------------------------------------------------------------
2373 ## filesystem-related functions
2374
2375 sub get_file_owner {
2376         my $path = shift;
2377
2378         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2379         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2380         if (!defined $gcos) {
2381                 return undef;
2382         }
2383         my $owner = $gcos;
2384         $owner =~ s/[,;].*$//;
2385         return to_utf8($owner);
2386 }
2387
2388 ## ......................................................................
2389 ## mimetype related functions
2390
2391 sub mimetype_guess_file {
2392         my $filename = shift;
2393         my $mimemap = shift;
2394         -r $mimemap or return undef;
2395
2396         my %mimemap;
2397         open(MIME, $mimemap) or return undef;
2398         while (<MIME>) {
2399                 next if m/^#/; # skip comments
2400                 my ($mime, $exts) = split(/\t+/);
2401                 if (defined $exts) {
2402                         my @exts = split(/\s+/, $exts);
2403                         foreach my $ext (@exts) {
2404                                 $mimemap{$ext} = $mime;
2405                         }
2406                 }
2407         }
2408         close(MIME);
2409
2410         $filename =~ /\.([^.]*)$/;
2411         return $mimemap{$1};
2412 }
2413
2414 sub mimetype_guess {
2415         my $filename = shift;
2416         my $mime;
2417         $filename =~ /\./ or return undef;
2418
2419         if ($mimetypes_file) {
2420                 my $file = $mimetypes_file;
2421                 if ($file !~ m!^/!) { # if it is relative path
2422                         # it is relative to project
2423                         $file = "$projectroot/$project/$file";
2424                 }
2425                 $mime = mimetype_guess_file($filename, $file);
2426         }
2427         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2428         return $mime;
2429 }
2430
2431 sub blob_mimetype {
2432         my $fd = shift;
2433         my $filename = shift;
2434
2435         if ($filename) {
2436                 my $mime = mimetype_guess($filename);
2437                 $mime and return $mime;
2438         }
2439
2440         # just in case
2441         return $default_blob_plain_mimetype unless $fd;
2442
2443         if (-T $fd) {
2444                 return 'text/plain' .
2445                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2446         } elsif (! $filename) {
2447                 return 'application/octet-stream';
2448         } elsif ($filename =~ m/\.png$/i) {
2449                 return 'image/png';
2450         } elsif ($filename =~ m/\.gif$/i) {
2451                 return 'image/gif';
2452         } elsif ($filename =~ m/\.jpe?g$/i) {
2453                 return 'image/jpeg';
2454         } else {
2455                 return 'application/octet-stream';
2456         }
2457 }
2458
2459 ## ======================================================================
2460 ## functions printing HTML: header, footer, error page
2461
2462 sub git_header_html {
2463         my $status = shift || "200 OK";
2464         my $expires = shift;
2465
2466         my $title = "$site_name";
2467         if (defined $project) {
2468                 $title .= " - " . to_utf8($project);
2469                 if (defined $action) {
2470                         $title .= "/$action";
2471                         if (defined $file_name) {
2472                                 $title .= " - " . esc_path($file_name);
2473                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2474                                         $title .= "/";
2475                                 }
2476                         }
2477                 }
2478         }
2479         my $content_type;
2480         # require explicit support from the UA if we are to send the page as
2481         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2482         # we have to do this because MSIE sometimes globs '*/*', pretending to
2483         # support xhtml+xml but choking when it gets what it asked for.
2484         if (defined $cgi->http('HTTP_ACCEPT') &&
2485             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2486             $cgi->Accept('application/xhtml+xml') != 0) {
2487                 $content_type = 'application/xhtml+xml';
2488         } else {
2489                 $content_type = 'text/html';
2490         }
2491         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2492                            -status=> $status, -expires => $expires);
2493         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2494         print <<EOF;
2495 <?xml version="1.0" encoding="utf-8"?>
2496 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2497 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2498 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2499 <!-- git core binaries version $git_version -->
2500 <head>
2501 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2502 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2503 <meta name="robots" content="index, nofollow"/>
2504 <title>$title</title>
2505 EOF
2506 # print out each stylesheet that exist
2507         if (defined $stylesheet) {
2508 #provides backwards capability for those people who define style sheet in a config file
2509                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2510         } else {
2511                 foreach my $stylesheet (@stylesheets) {
2512                         next unless $stylesheet;
2513                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2514                 }
2515         }
2516         if (defined $project) {
2517                 printf('<link rel="alternate" title="%s log RSS feed" '.
2518                        'href="%s" type="application/rss+xml" />'."\n",
2519                        esc_param($project), href(action=>"rss"));
2520                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2521                        'href="%s" type="application/rss+xml" />'."\n",
2522                        esc_param($project), href(action=>"rss",
2523                                                  extra_options=>"--no-merges"));
2524                 printf('<link rel="alternate" title="%s log Atom feed" '.
2525                        'href="%s" type="application/atom+xml" />'."\n",
2526                        esc_param($project), href(action=>"atom"));
2527                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2528                        'href="%s" type="application/atom+xml" />'."\n",
2529                        esc_param($project), href(action=>"atom",
2530                                                  extra_options=>"--no-merges"));
2531         } else {
2532                 printf('<link rel="alternate" title="%s projects list" '.
2533                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2534                        $site_name, href(project=>undef, action=>"project_index"));
2535                 printf('<link rel="alternate" title="%s projects feeds" '.
2536                        'href="%s" type="text/x-opml"/>'."\n",
2537                        $site_name, href(project=>undef, action=>"opml"));
2538         }
2539         if (defined $favicon) {
2540                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2541         }
2542
2543         print "</head>\n" .
2544               "<body>\n";
2545
2546         if (-f $site_header) {
2547                 open (my $fd, $site_header);
2548                 print <$fd>;
2549                 close $fd;
2550         }
2551
2552         print "<div class=\"page_header\">\n" .
2553               $cgi->a({-href => esc_url($logo_url),
2554                        -title => $logo_label},
2555                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2556         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2557         if (defined $project) {
2558                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2559                 if (defined $action) {
2560                         print " / $action";
2561                 }
2562                 print "\n";
2563         }
2564         print "</div>\n";
2565
2566         my ($have_search) = gitweb_check_feature('search');
2567         if ((defined $project) && ($have_search)) {
2568                 if (!defined $searchtext) {
2569                         $searchtext = "";
2570                 }
2571                 my $search_hash;
2572                 if (defined $hash_base) {
2573                         $search_hash = $hash_base;
2574                 } elsif (defined $hash) {
2575                         $search_hash = $hash;
2576                 } else {
2577                         $search_hash = "HEAD";
2578                 }
2579                 my $action = $my_uri;
2580                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2581                 if ($use_pathinfo) {
2582                         $action .= "/".esc_url($project);
2583                 } else {
2584                         $cgi->param("p", $project);
2585                 }
2586                 $cgi->param("a", "search");
2587                 $cgi->param("h", $search_hash);
2588                 print $cgi->startform(-method => "get", -action => $action) .
2589                       "<div class=\"search\">\n" .
2590                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2591                       $cgi->hidden(-name => "a") . "\n" .
2592                       $cgi->hidden(-name => "h") . "\n" .
2593                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2594                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2595                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2596                       " search:\n",
2597                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2598                       "<span title=\"Extended regular expression\">" .
2599                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2600                                      -checked => $search_use_regexp) .
2601                       "</span>" .
2602                       "</div>" .
2603                       $cgi->end_form() . "\n";
2604         }
2605 }
2606
2607 sub git_footer_html {
2608         print "<div class=\"page_footer\">\n";
2609         if (defined $project) {
2610                 my $descr = git_get_project_description($project);
2611                 if (defined $descr) {
2612                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2613                 }
2614                 print $cgi->a({-href => href(action=>"rss"),
2615                               -class => "rss_logo"}, "RSS") . " ";
2616                 print $cgi->a({-href => href(action=>"atom"),
2617                               -class => "rss_logo"}, "Atom") . "\n";
2618         } else {
2619                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2620                               -class => "rss_logo"}, "OPML") . " ";
2621                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2622                               -class => "rss_logo"}, "TXT") . "\n";
2623         }
2624         print "</div>\n" ;
2625
2626         if (-f $site_footer) {
2627                 open (my $fd, $site_footer);
2628                 print <$fd>;
2629                 close $fd;
2630         }
2631
2632         print "</body>\n" .
2633               "</html>";
2634 }
2635
2636 sub die_error {
2637         my $status = shift || "403 Forbidden";
2638         my $error = shift || "Malformed query, file missing or permission denied";
2639
2640         git_header_html($status);
2641         print <<EOF;
2642 <div class="page_body">
2643 <br /><br />
2644 $status - $error
2645 <br />
2646 </div>
2647 EOF
2648         git_footer_html();
2649         exit;
2650 }
2651
2652 ## ----------------------------------------------------------------------
2653 ## functions printing or outputting HTML: navigation
2654
2655 sub git_print_page_nav {
2656         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2657         $extra = '' if !defined $extra; # pager or formats
2658
2659         my @navs = qw(summary shortlog log commit commitdiff tree);
2660         if ($suppress) {
2661                 @navs = grep { $_ ne $suppress } @navs;
2662         }
2663
2664         my %arg = map { $_ => {action=>$_} } @navs;
2665         if (defined $head) {
2666                 for (qw(commit commitdiff)) {
2667                         $arg{$_}{'hash'} = $head;
2668                 }
2669                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2670                         for (qw(shortlog log)) {
2671                                 $arg{$_}{'hash'} = $head;
2672                         }
2673                 }
2674         }
2675         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2676         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2677
2678         print "<div class=\"page_nav\">\n" .
2679                 (join " | ",
2680                  map { $_ eq $current ?
2681                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2682                  } @navs);
2683         print "<br/>\n$extra<br/>\n" .
2684               "</div>\n";
2685 }
2686
2687 sub format_paging_nav {
2688         my ($action, $hash, $head, $page, $has_next_link) = @_;
2689         my $paging_nav;
2690
2691
2692         if ($hash ne $head || $page) {
2693                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2694         } else {
2695                 $paging_nav .= "HEAD";
2696         }
2697
2698         if ($page > 0) {
2699                 $paging_nav .= " &sdot; " .
2700                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2701                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2702         } else {
2703                 $paging_nav .= " &sdot; prev";
2704         }
2705
2706         if ($has_next_link) {
2707                 $paging_nav .= " &sdot; " .
2708                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2709                                  -accesskey => "n", -title => "Alt-n"}, "next");
2710         } else {
2711                 $paging_nav .= " &sdot; next";
2712         }
2713
2714         return $paging_nav;
2715 }
2716
2717 ## ......................................................................
2718 ## functions printing or outputting HTML: div
2719
2720 sub git_print_header_div {
2721         my ($action, $title, $hash, $hash_base) = @_;
2722         my %args = ();
2723
2724         $args{'action'} = $action;
2725         $args{'hash'} = $hash if $hash;
2726         $args{'hash_base'} = $hash_base if $hash_base;
2727
2728         print "<div class=\"header\">\n" .
2729               $cgi->a({-href => href(%args), -class => "title"},
2730               $title ? $title : $action) .
2731               "\n</div>\n";
2732 }
2733
2734 #sub git_print_authorship (\%) {
2735 sub git_print_authorship {
2736         my $co = shift;
2737
2738         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2739         print "<div class=\"author_date\">" .
2740               esc_html($co->{'author_name'}) .
2741               " [$ad{'rfc2822'}";
2742         if ($ad{'hour_local'} < 6) {
2743                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2744                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2745         } else {
2746                 printf(" (%02d:%02d %s)",
2747                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2748         }
2749         print "]</div>\n";
2750 }
2751
2752 sub git_print_page_path {
2753         my $name = shift;
2754         my $type = shift;
2755         my $hb = shift;
2756
2757
2758         print "<div class=\"page_path\">";
2759         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2760                       -title => 'tree root'}, to_utf8("[$project]"));
2761         print " / ";
2762         if (defined $name) {
2763                 my @dirname = split '/', $name;
2764                 my $basename = pop @dirname;
2765                 my $fullname = '';
2766
2767                 foreach my $dir (@dirname) {
2768                         $fullname .= ($fullname ? '/' : '') . $dir;
2769                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2770                                                      hash_base=>$hb),
2771                                       -title => $fullname}, esc_path($dir));
2772                         print " / ";
2773                 }
2774                 if (defined $type && $type eq 'blob') {
2775                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2776                                                      hash_base=>$hb),
2777                                       -title => $name}, esc_path($basename));
2778                 } elsif (defined $type && $type eq 'tree') {
2779                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2780                                                      hash_base=>$hb),
2781                                       -title => $name}, esc_path($basename));
2782                         print " / ";
2783                 } else {
2784                         print esc_path($basename);
2785                 }
2786         }
2787         print "<br/></div>\n";
2788 }
2789
2790 # sub git_print_log (\@;%) {
2791 sub git_print_log ($;%) {
2792         my $log = shift;
2793         my %opts = @_;
2794
2795         if ($opts{'-remove_title'}) {
2796                 # remove title, i.e. first line of log
2797                 shift @$log;
2798         }
2799         # remove leading empty lines
2800         while (defined $log->[0] && $log->[0] eq "") {
2801                 shift @$log;
2802         }
2803
2804         # print log
2805         my $signoff = 0;
2806         my $empty = 0;
2807         foreach my $line (@$log) {
2808                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2809                         $signoff = 1;
2810                         $empty = 0;
2811                         if (! $opts{'-remove_signoff'}) {
2812                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2813                                 next;
2814                         } else {
2815                                 # remove signoff lines
2816                                 next;
2817                         }
2818                 } else {
2819                         $signoff = 0;
2820                 }
2821
2822                 # print only one empty line
2823                 # do not print empty line after signoff
2824                 if ($line eq "") {
2825                         next if ($empty || $signoff);
2826                         $empty = 1;
2827                 } else {
2828                         $empty = 0;
2829                 }
2830
2831                 print format_log_line_html($line) . "<br/>\n";
2832         }
2833
2834         if ($opts{'-final_empty_line'}) {
2835                 # end with single empty line
2836                 print "<br/>\n" unless $empty;
2837         }
2838 }
2839
2840 # return link target (what link points to)
2841 sub git_get_link_target {
2842         my $hash = shift;
2843         my $link_target;
2844
2845         # read link
2846         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2847                 or return;
2848         {
2849                 local $/;
2850                 $link_target = <$fd>;
2851         }
2852         close $fd
2853                 or return;
2854
2855         return $link_target;
2856 }
2857
2858 # given link target, and the directory (basedir) the link is in,
2859 # return target of link relative to top directory (top tree);
2860 # return undef if it is not possible (including absolute links).
2861 sub normalize_link_target {
2862         my ($link_target, $basedir, $hash_base) = @_;
2863
2864         # we can normalize symlink target only if $hash_base is provided
2865         return unless $hash_base;
2866
2867         # absolute symlinks (beginning with '/') cannot be normalized
2868         return if (substr($link_target, 0, 1) eq '/');
2869
2870         # normalize link target to path from top (root) tree (dir)
2871         my $path;
2872         if ($basedir) {
2873                 $path = $basedir . '/' . $link_target;
2874         } else {
2875                 # we are in top (root) tree (dir)
2876                 $path = $link_target;
2877         }
2878
2879         # remove //, /./, and /../
2880         my @path_parts;
2881         foreach my $part (split('/', $path)) {
2882                 # discard '.' and ''
2883                 next if (!$part || $part eq '.');
2884                 # handle '..'
2885                 if ($part eq '..') {
2886                         if (@path_parts) {
2887                                 pop @path_parts;
2888                         } else {
2889                                 # link leads outside repository (outside top dir)
2890                                 return;
2891                         }
2892                 } else {
2893                         push @path_parts, $part;
2894                 }
2895         }
2896         $path = join('/', @path_parts);
2897
2898         return $path;
2899 }
2900
2901 # print tree entry (row of git_tree), but without encompassing <tr> element
2902 sub git_print_tree_entry {
2903         my ($t, $basedir, $hash_base, $have_blame) = @_;
2904
2905         my %base_key = ();
2906         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2907
2908         # The format of a table row is: mode list link.  Where mode is
2909         # the mode of the entry, list is the name of the entry, an href,
2910         # and link is the action links of the entry.
2911
2912         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2913         if ($t->{'type'} eq "blob") {
2914                 print "<td class=\"list\">" .
2915                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2916                                                file_name=>"$basedir$t->{'name'}", %base_key),
2917                                 -class => "list"}, esc_path($t->{'name'}));
2918                 if (S_ISLNK(oct $t->{'mode'})) {
2919                         my $link_target = git_get_link_target($t->{'hash'});
2920                         if ($link_target) {
2921                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2922                                 if (defined $norm_target) {
2923                                         print " -> " .
2924                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2925                                                                      file_name=>$norm_target),
2926                                                        -title => $norm_target}, esc_path($link_target));
2927                                 } else {
2928                                         print " -> " . esc_path($link_target);
2929                                 }
2930                         }
2931                 }
2932                 print "</td>\n";
2933                 print "<td class=\"link\">";
2934                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2935                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2936                               "blob");
2937                 if ($have_blame) {
2938                         print " | " .
2939                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2940                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2941                                       "blame");
2942                 }
2943                 if (defined $hash_base) {
2944                         print " | " .
2945                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2946                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2947                                       "history");
2948                 }
2949                 print " | " .
2950                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2951                                                file_name=>"$basedir$t->{'name'}")},
2952                                 "raw");
2953                 print "</td>\n";
2954
2955         } elsif ($t->{'type'} eq "tree") {
2956                 print "<td class=\"list\">";
2957                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2958                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2959                               esc_path($t->{'name'}));
2960                 print "</td>\n";
2961                 print "<td class=\"link\">";
2962                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2963                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2964                               "tree");
2965                 if (defined $hash_base) {
2966                         print " | " .
2967                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2968                                                      file_name=>"$basedir$t->{'name'}")},
2969                                       "history");
2970                 }
2971                 print "</td>\n";
2972         } else {
2973                 # unknown object: we can only present history for it
2974                 # (this includes 'commit' object, i.e. submodule support)
2975                 print "<td class=\"list\">" .
2976                       esc_path($t->{'name'}) .
2977                       "</td>\n";
2978                 print "<td class=\"link\">";
2979                 if (defined $hash_base) {
2980                         print $cgi->a({-href => href(action=>"history",
2981                                                      hash_base=>$hash_base,
2982                                                      file_name=>"$basedir$t->{'name'}")},
2983                                       "history");
2984                 }
2985                 print "</td>\n";
2986         }
2987 }
2988
2989 ## ......................................................................
2990 ## functions printing large fragments of HTML
2991
2992 # get pre-image filenames for merge (combined) diff
2993 sub fill_from_file_info {
2994         my ($diff, @parents) = @_;
2995
2996         $diff->{'from_file'} = [ ];
2997         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2998         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2999                 if ($diff->{'status'}[$i] eq 'R' ||
3000                     $diff->{'status'}[$i] eq 'C') {
3001                         $diff->{'from_file'}[$i] =
3002                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3003                 }
3004         }
3005
3006         return $diff;
3007 }
3008
3009 # is current raw difftree line of file deletion
3010 sub is_deleted {
3011         my $diffinfo = shift;
3012
3013         return $diffinfo->{'to_id'} eq ('0' x 40);
3014 }
3015
3016 # does patch correspond to [previous] difftree raw line
3017 # $diffinfo  - hashref of parsed raw diff format
3018 # $patchinfo - hashref of parsed patch diff format
3019 #              (the same keys as in $diffinfo)
3020 sub is_patch_split {
3021         my ($diffinfo, $patchinfo) = @_;
3022
3023         return defined $diffinfo && defined $patchinfo
3024                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3025 }
3026
3027
3028 sub git_difftree_body {
3029         my ($difftree, $hash, @parents) = @_;
3030         my ($parent) = $parents[0];
3031         my ($have_blame) = gitweb_check_feature('blame');
3032         print "<div class=\"list_head\">\n";
3033         if ($#{$difftree} > 10) {
3034                 print(($#{$difftree} + 1) . " files changed:\n");
3035         }
3036         print "</div>\n";
3037
3038         print "<table class=\"" .
3039               (@parents > 1 ? "combined " : "") .
3040               "diff_tree\">\n";
3041
3042         # header only for combined diff in 'commitdiff' view
3043         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3044         if ($has_header) {
3045                 # table header
3046                 print "<thead><tr>\n" .
3047                        "<th></th><th></th>\n"; # filename, patchN link
3048                 for (my $i = 0; $i < @parents; $i++) {
3049                         my $par = $parents[$i];
3050                         print "<th>" .
3051                               $cgi->a({-href => href(action=>"commitdiff",
3052                                                      hash=>$hash, hash_parent=>$par),
3053                                        -title => 'commitdiff to parent number ' .
3054                                                   ($i+1) . ': ' . substr($par,0,7)},
3055                                       $i+1) .
3056                               "&nbsp;</th>\n";
3057                 }
3058                 print "</tr></thead>\n<tbody>\n";
3059         }
3060
3061         my $alternate = 1;
3062         my $patchno = 0;
3063         foreach my $line (@{$difftree}) {
3064                 my $diff = parsed_difftree_line($line);
3065
3066                 if ($alternate) {
3067                         print "<tr class=\"dark\">\n";
3068                 } else {
3069                         print "<tr class=\"light\">\n";
3070                 }
3071                 $alternate ^= 1;
3072
3073                 if (exists $diff->{'nparents'}) { # combined diff
3074
3075                         fill_from_file_info($diff, @parents)
3076                                 unless exists $diff->{'from_file'};
3077
3078                         if (!is_deleted($diff)) {
3079                                 # file exists in the result (child) commit
3080                                 print "<td>" .
3081                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3082                                                              file_name=>$diff->{'to_file'},
3083                                                              hash_base=>$hash),
3084                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3085                                       "</td>\n";
3086                         } else {
3087                                 print "<td>" .
3088                                       esc_path($diff->{'to_file'}) .
3089                                       "</td>\n";
3090                         }
3091
3092                         if ($action eq 'commitdiff') {
3093                                 # link to patch
3094                                 $patchno++;
3095                                 print "<td class=\"link\">" .
3096                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3097                                       " | " .
3098                                       "</td>\n";
3099                         }
3100
3101                         my $has_history = 0;
3102                         my $not_deleted = 0;
3103                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3104                                 my $hash_parent = $parents[$i];
3105                                 my $from_hash = $diff->{'from_id'}[$i];
3106                                 my $from_path = $diff->{'from_file'}[$i];
3107                                 my $status = $diff->{'status'}[$i];
3108
3109                                 $has_history ||= ($status ne 'A');
3110                                 $not_deleted ||= ($status ne 'D');
3111
3112                                 if ($status eq 'A') {
3113                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3114                                 } elsif ($status eq 'D') {
3115                                         print "<td class=\"link\">" .
3116                                               $cgi->a({-href => href(action=>"blob",
3117                                                                      hash_base=>$hash,
3118                                                                      hash=>$from_hash,
3119                                                                      file_name=>$from_path)},
3120                                                       "blob" . ($i+1)) .
3121                                               " | </td>\n";
3122                                 } else {
3123                                         if ($diff->{'to_id'} eq $from_hash) {
3124                                                 print "<td class=\"link nochange\">";
3125                                         } else {
3126                                                 print "<td class=\"link\">";
3127                                         }
3128                                         print $cgi->a({-href => href(action=>"blobdiff",
3129                                                                      hash=>$diff->{'to_id'},
3130                                                                      hash_parent=>$from_hash,
3131                                                                      hash_base=>$hash,
3132                                                                      hash_parent_base=>$hash_parent,
3133                                                                      file_name=>$diff->{'to_file'},
3134                                                                      file_parent=>$from_path)},
3135                                                       "diff" . ($i+1)) .
3136                                               " | </td>\n";
3137                                 }
3138                         }
3139
3140                         print "<td class=\"link\">";
3141                         if ($not_deleted) {
3142                                 print $cgi->a({-href => href(action=>"blob",
3143                                                              hash=>$diff->{'to_id'},
3144                                                              file_name=>$diff->{'to_file'},
3145                                                              hash_base=>$hash)},
3146                                               "blob");
3147                                 print " | " if ($has_history);
3148                         }
3149                         if ($has_history) {
3150                                 print $cgi->a({-href => href(action=>"history",
3151                                                              file_name=>$diff->{'to_file'},
3152                                                              hash_base=>$hash)},
3153                                               "history");
3154                         }
3155                         print "</td>\n";
3156
3157                         print "</tr>\n";
3158                         next; # instead of 'else' clause, to avoid extra indent
3159                 }
3160                 # else ordinary diff
3161
3162                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3163                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3164                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3165                         $to_mode_oct = oct $diff->{'to_mode'};
3166                         if (S_ISREG($to_mode_oct)) { # only for regular file
3167                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3168                         }
3169                         $to_file_type = file_type($diff->{'to_mode'});
3170                 }
3171                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3172                         $from_mode_oct = oct $diff->{'from_mode'};
3173                         if (S_ISREG($to_mode_oct)) { # only for regular file
3174                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3175                         }
3176                         $from_file_type = file_type($diff->{'from_mode'});
3177                 }
3178
3179                 if ($diff->{'status'} eq "A") { # created
3180                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3181                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3182                         $mode_chng   .= "]</span>";
3183                         print "<td>";
3184                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3185                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3186                                       -class => "list"}, esc_path($diff->{'file'}));
3187                         print "</td>\n";
3188                         print "<td>$mode_chng</td>\n";
3189                         print "<td class=\"link\">";
3190                         if ($action eq 'commitdiff') {
3191                                 # link to patch
3192                                 $patchno++;
3193                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3194                                 print " | ";
3195                         }
3196                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3197                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3198                                       "blob");
3199                         print "</td>\n";
3200
3201                 } elsif ($diff->{'status'} eq "D") { # deleted
3202                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3203                         print "<td>";
3204                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3205                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3206                                        -class => "list"}, esc_path($diff->{'file'}));
3207                         print "</td>\n";
3208                         print "<td>$mode_chng</td>\n";
3209                         print "<td class=\"link\">";
3210                         if ($action eq 'commitdiff') {
3211                                 # link to patch
3212                                 $patchno++;
3213                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3214                                 print " | ";
3215                         }
3216                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3217                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3218                                       "blob") . " | ";
3219                         if ($have_blame) {
3220                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3221                                                              file_name=>$diff->{'file'})},
3222                                               "blame") . " | ";
3223                         }
3224                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3225                                                      file_name=>$diff->{'file'})},
3226                                       "history");
3227                         print "</td>\n";
3228
3229                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3230                         my $mode_chnge = "";
3231                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3232                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3233                                 if ($from_file_type ne $to_file_type) {
3234                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3235                                 }
3236                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3237                                         if ($from_mode_str && $to_mode_str) {
3238                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3239                                         } elsif ($to_mode_str) {
3240                                                 $mode_chnge .= " mode: $to_mode_str";
3241                                         }
3242                                 }
3243                                 $mode_chnge .= "]</span>\n";
3244                         }
3245                         print "<td>";
3246                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3247                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3248                                       -class => "list"}, esc_path($diff->{'file'}));
3249                         print "</td>\n";
3250                         print "<td>$mode_chnge</td>\n";
3251                         print "<td class=\"link\">";
3252                         if ($action eq 'commitdiff') {
3253                                 # link to patch
3254                                 $patchno++;
3255                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3256                                       " | ";
3257                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3258                                 # "commit" view and modified file (not onlu mode changed)
3259                                 print $cgi->a({-href => href(action=>"blobdiff",
3260                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3261                                                              hash_base=>$hash, hash_parent_base=>$parent,
3262                                                              file_name=>$diff->{'file'})},
3263                                               "diff") .
3264                                       " | ";
3265                         }
3266                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3267                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3268                                        "blob") . " | ";
3269                         if ($have_blame) {
3270                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3271                                                              file_name=>$diff->{'file'})},
3272                                               "blame") . " | ";
3273                         }
3274                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3275                                                      file_name=>$diff->{'file'})},
3276                                       "history");
3277                         print "</td>\n";
3278
3279                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3280                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3281                         my $nstatus = $status_name{$diff->{'status'}};
3282                         my $mode_chng = "";
3283                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3284                                 # mode also for directories, so we cannot use $to_mode_str
3285                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3286                         }
3287                         print "<td>" .
3288                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3289                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3290                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3291                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3292                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3293                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3294                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3295                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3296                               "<td class=\"link\">";
3297                         if ($action eq 'commitdiff') {
3298                                 # link to patch
3299                                 $patchno++;
3300                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3301                                       " | ";
3302                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3303                                 # "commit" view and modified file (not only pure rename or copy)
3304                                 print $cgi->a({-href => href(action=>"blobdiff",
3305                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3306                                                              hash_base=>$hash, hash_parent_base=>$parent,
3307                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3308                                               "diff") .
3309                                       " | ";
3310                         }
3311                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3312                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3313                                       "blob") . " | ";
3314                         if ($have_blame) {
3315                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3316                                                              file_name=>$diff->{'to_file'})},
3317                                               "blame") . " | ";
3318                         }
3319                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3320                                                     file_name=>$diff->{'to_file'})},
3321                                       "history");
3322                         print "</td>\n";
3323
3324                 } # we should not encounter Unmerged (U) or Unknown (X) status
3325                 print "</tr>\n";
3326         }
3327         print "</tbody>" if $has_header;
3328         print "</table>\n";
3329 }
3330
3331 sub git_patchset_body {
3332         my ($fd, $difftree, $hash, @hash_parents) = @_;
3333         my ($hash_parent) = $hash_parents[0];
3334
3335         my $is_combined = (@hash_parents > 1);
3336         my $patch_idx = 0;
3337         my $patch_number = 0;
3338         my $patch_line;
3339         my $diffinfo;
3340         my $to_name;
3341         my (%from, %to);
3342
3343         print "<div class=\"patchset\">\n";
3344
3345         # skip to first patch
3346         while ($patch_line = <$fd>) {
3347                 chomp $patch_line;
3348
3349                 last if ($patch_line =~ m/^diff /);
3350         }
3351
3352  PATCH:
3353         while ($patch_line) {
3354
3355                 # parse "git diff" header line
3356                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3357                         # $1 is from_name, which we do not use
3358                         $to_name = unquote($2);
3359                         $to_name =~ s!^b/!!;
3360                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3361                         # $1 is 'cc' or 'combined', which we do not use
3362                         $to_name = unquote($2);
3363                 } else {
3364                         $to_name = undef;
3365                 }
3366
3367                 # check if current patch belong to current raw line
3368                 # and parse raw git-diff line if needed
3369                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3370                         # this is continuation of a split patch
3371                         print "<div class=\"patch cont\">\n";
3372                 } else {
3373                         # advance raw git-diff output if needed
3374                         $patch_idx++ if defined $diffinfo;
3375
3376                         # read and prepare patch information
3377                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3378
3379                         # compact combined diff output can have some patches skipped
3380                         # find which patch (using pathname of result) we are at now;
3381                         if ($is_combined) {
3382                                 while ($to_name ne $diffinfo->{'to_file'}) {
3383                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3384                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3385                                               "</div>\n";  # class="patch"
3386
3387                                         $patch_idx++;
3388                                         $patch_number++;
3389
3390                                         last if $patch_idx > $#$difftree;
3391                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3392                                 }
3393                         }
3394
3395                         # modifies %from, %to hashes
3396                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3397
3398                         # this is first patch for raw difftree line with $patch_idx index
3399                         # we index @$difftree array from 0, but number patches from 1
3400                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3401                 }
3402
3403                 # git diff header
3404                 #assert($patch_line =~ m/^diff /) if DEBUG;
3405                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3406                 $patch_number++;
3407                 # print "git diff" header
3408                 print format_git_diff_header_line($patch_line, $diffinfo,
3409                                                   \%from, \%to);
3410
3411                 # print extended diff header
3412                 print "<div class=\"diff extended_header\">\n";
3413         EXTENDED_HEADER:
3414                 while ($patch_line = <$fd>) {
3415                         chomp $patch_line;
3416
3417                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3418
3419                         print format_extended_diff_header_line($patch_line, $diffinfo,
3420                                                                \%from, \%to);
3421                 }
3422                 print "</div>\n"; # class="diff extended_header"
3423
3424                 # from-file/to-file diff header
3425                 if (! $patch_line) {
3426                         print "</div>\n"; # class="patch"
3427                         last PATCH;
3428                 }
3429                 next PATCH if ($patch_line =~ m/^diff /);
3430                 #assert($patch_line =~ m/^---/) if DEBUG;
3431
3432                 my $last_patch_line = $patch_line;
3433                 $patch_line = <$fd>;
3434                 chomp $patch_line;
3435                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3436
3437                 print format_diff_from_to_header($last_patch_line, $patch_line,
3438                                                  $diffinfo, \%from, \%to,
3439                                                  @hash_parents);
3440
3441                 # the patch itself
3442         LINE:
3443                 while ($patch_line = <$fd>) {
3444                         chomp $patch_line;
3445
3446                         next PATCH if ($patch_line =~ m/^diff /);
3447
3448                         print format_diff_line($patch_line, \%from, \%to);
3449                 }
3450
3451         } continue {
3452                 print "</div>\n"; # class="patch"
3453         }
3454
3455         # for compact combined (--cc) format, with chunk and patch simpliciaction
3456         # patchset might be empty, but there might be unprocessed raw lines
3457         for (++$patch_idx if $patch_number > 0;
3458              $patch_idx < @$difftree;
3459              ++$patch_idx) {
3460                 # read and prepare patch information
3461                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3462
3463                 # generate anchor for "patch" links in difftree / whatchanged part
3464                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3465                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3466                       "</div>\n";  # class="patch"
3467
3468                 $patch_number++;
3469         }
3470
3471         if ($patch_number == 0) {
3472                 if (@hash_parents > 1) {
3473                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3474                 } else {
3475                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3476                 }
3477         }
3478
3479         print "</div>\n"; # class="patchset"
3480 }
3481
3482 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3483
3484 sub git_project_list_body {
3485         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3486
3487         my ($check_forks) = gitweb_check_feature('forks');
3488
3489         my @projects;
3490         foreach my $pr (@$projlist) {
3491                 my (@aa) = git_get_last_activity($pr->{'path'});
3492                 unless (@aa) {
3493                         next;
3494                 }
3495                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3496                 if (!defined $pr->{'descr'}) {
3497                         my $descr = git_get_project_description($pr->{'path'}) || "";
3498                         $pr->{'descr_long'} = to_utf8($descr);
3499                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3500                 }
3501                 if (!defined $pr->{'owner'}) {
3502                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3503                 }
3504                 if ($check_forks) {
3505                         my $pname = $pr->{'path'};
3506                         if (($pname =~ s/\.git$//) &&
3507                             ($pname !~ /\/$/) &&
3508                             (-d "$projectroot/$pname")) {
3509                                 $pr->{'forks'} = "-d $projectroot/$pname";
3510                         }
3511                         else {
3512                                 $pr->{'forks'} = 0;
3513                         }
3514                 }
3515                 push @projects, $pr;
3516         }
3517
3518         $order ||= $default_projects_order;
3519         $from = 0 unless defined $from;
3520         $to = $#projects if (!defined $to || $#projects < $to);
3521
3522         print "<table class=\"project_list\">\n";
3523         unless ($no_header) {
3524                 print "<tr>\n";
3525                 if ($check_forks) {
3526                         print "<th></th>\n";
3527                 }
3528                 if ($order eq "project") {
3529                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3530                         print "<th>Project</th>\n";
3531                 } else {
3532                         print "<th>" .
3533                               $cgi->a({-href => href(project=>undef, order=>'project'),
3534                                        -class => "header"}, "Project") .
3535                               "</th>\n";
3536                 }
3537                 if ($order eq "descr") {
3538                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3539                         print "<th>Description</th>\n";
3540                 } else {
3541                         print "<th>" .
3542                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3543                                        -class => "header"}, "Description") .
3544                               "</th>\n";
3545                 }
3546                 if ($order eq "owner") {
3547                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3548                         print "<th>Owner</th>\n";
3549                 } else {
3550                         print "<th>" .
3551                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3552                                        -class => "header"}, "Owner") .
3553                               "</th>\n";
3554                 }
3555                 if ($order eq "age") {
3556                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3557                         print "<th>Last Change</th>\n";
3558                 } else {
3559                         print "<th>" .
3560                               $cgi->a({-href => href(project=>undef, order=>'age'),
3561                                        -class => "header"}, "Last Change") .
3562                               "</th>\n";
3563                 }
3564                 print "<th></th>\n" .
3565                       "</tr>\n";
3566         }
3567         my $alternate = 1;
3568         for (my $i = $from; $i <= $to; $i++) {
3569                 my $pr = $projects[$i];
3570                 if ($alternate) {
3571                         print "<tr class=\"dark\">\n";
3572                 } else {
3573                         print "<tr class=\"light\">\n";
3574                 }
3575                 $alternate ^= 1;
3576                 if ($check_forks) {
3577                         print "<td>";
3578                         if ($pr->{'forks'}) {
3579                                 print "<!-- $pr->{'forks'} -->\n";
3580                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3581                         }
3582                         print "</td>\n";
3583                 }
3584                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3585                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3586                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3587                                         -class => "list", -title => $pr->{'descr_long'}},
3588                                         esc_html($pr->{'descr'})) . "</td>\n" .
3589                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3590                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3591                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3592                       "<td class=\"link\">" .
3593                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3594                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3595                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3596                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3597                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3598                       "</td>\n" .
3599                       "</tr>\n";
3600         }
3601         if (defined $extra) {
3602                 print "<tr>\n";
3603                 if ($check_forks) {
3604                         print "<td></td>\n";
3605                 }
3606                 print "<td colspan=\"5\">$extra</td>\n" .
3607                       "</tr>\n";
3608         }
3609         print "</table>\n";
3610 }
3611
3612
3613 sub git_shortlog_body {
3614         # uses global variable $project
3615         my ($commitlist, $from, $to, $refs, $extra) = @_;
3616
3617         $from = 0 unless defined $from;
3618         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3619
3620         print "<table class=\"shortlog\">\n";
3621         my $alternate = 1;
3622         for (my $i = $from; $i <= $to; $i++) {
3623                 my %co = %{$commitlist->[$i]};
3624                 my $commit = $co{'id'};
3625                 my $ref = format_ref_marker($refs, $commit);
3626                 if ($alternate) {
3627                         print "<tr class=\"dark\">\n";
3628                 } else {
3629                         print "<tr class=\"light\">\n";
3630                 }
3631                 $alternate ^= 1;
3632                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3633                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3634                 print "<td title=\"$co{'age_string_age'}\" class=\"age\">$co{'age_string_date'}</td>\n" .
3635                       "<td><i>" . $author . "</i></td>\n" .
3636                       "<td>";
3637                 print format_subject_html($co{'title'}, $co{'title_short'},
3638                                           href(action=>"commit", hash=>$commit), $ref);
3639                 print "</td>\n" .
3640                       "<td class=\"link\">" .
3641                       $cgi->a({-class=>"commit",-href => href(action=>"commit", hash=>$commit)}, substr($commit,0,8)) . " | " .
3642                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "diff") . " | " .
3643                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3644                 my $snapshot_links = format_snapshot_links($commit);
3645                 if (defined $snapshot_links) {
3646                         print " | " . $snapshot_links;
3647                 }
3648                 print "</td>\n" .
3649                       "</tr>\n";
3650         }
3651         if (defined $extra) {
3652                 print "<tr>\n" .
3653                       "<td colspan=\"4\">$extra</td>\n" .
3654                       "</tr>\n";
3655         }
3656         print "</table>\n";
3657 }
3658
3659 sub git_history_body {
3660         # Warning: assumes constant type (blob or tree) during history
3661         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3662
3663         $from = 0 unless defined $from;
3664         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3665
3666         print "<table class=\"history\">\n";
3667         my $alternate = 1;
3668         for (my $i = $from; $i <= $to; $i++) {
3669                 my %co = %{$commitlist->[$i]};
3670                 if (!%co) {
3671                         next;
3672                 }
3673                 my $commit = $co{'id'};
3674
3675                 my $ref = format_ref_marker($refs, $commit);
3676
3677                 if ($alternate) {
3678                         print "<tr class=\"dark\">\n";
3679                 } else {
3680                         print "<tr class=\"light\">\n";
3681                 }
3682                 $alternate ^= 1;
3683         # shortlog uses      chop_str($co{'author_name'}, 10)
3684                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3685                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3686                       "<td><i>" . $author . "</i></td>\n" .
3687                       "<td>";
3688                 # originally git_history used chop_str($co{'title'}, 50)
3689                 print format_subject_html($co{'title'}, $co{'title_short'},
3690                                           href(action=>"commit", hash=>$commit), $ref);
3691                 print "</td>\n" .
3692                       "<td class=\"link\">" .
3693                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3694                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3695
3696                 if ($ftype eq 'blob') {
3697                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3698                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3699                         if (defined $blob_current && defined $blob_parent &&
3700                                         $blob_current ne $blob_parent) {
3701                                 print " | " .
3702                                         $cgi->a({-href => href(action=>"blobdiff",
3703                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3704                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3705                                                                file_name=>$file_name)},
3706                                                 "diff to current");
3707                         }
3708                 }
3709                 print "</td>\n" .
3710                       "</tr>\n";
3711         }
3712         if (defined $extra) {
3713                 print "<tr>\n" .
3714                       "<td colspan=\"4\">$extra</td>\n" .
3715                       "</tr>\n";
3716         }
3717         print "</table>\n";
3718 }
3719
3720 sub git_tags_body {
3721         # uses global variable $project
3722         my ($taglist, $from, $to, $extra) = @_;
3723         $from = 0 unless defined $from;
3724         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3725
3726         print "<table class=\"tags\">\n";
3727         my $alternate = 1;
3728         for (my $i = $from; $i <= $to; $i++) {
3729                 my $entry = $taglist->[$i];
3730                 my %tag = %$entry;
3731                 my $comment = $tag{'subject'};
3732                 my $comment_short;
3733                 if (defined $comment) {
3734                         $comment_short = chop_str($comment, 30, 5);
3735                 }
3736                 if ($alternate) {
3737                         print "<tr class=\"dark\">\n";
3738                 } else {
3739                         print "<tr class=\"light\">\n";
3740                 }
3741                 $alternate ^= 1;
3742                 if (defined $tag{'age'}) {
3743                         print "<td class=\"age\">$tag{'age'}</td>\n";
3744                 } else {
3745                         print "<td></td>\n";
3746                 }
3747                 print "<td>" .
3748                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3749                                -class => "list name"}, esc_html($tag{'name'})) .
3750                       "</td>\n" .
3751                       "<td>";
3752                 if (defined $comment) {
3753                         print format_subject_html($comment, $comment_short,
3754                                                   href(action=>"tag", hash=>$tag{'id'}));
3755                 }
3756                 print "</td>\n" .
3757                       "<td class=\"selflink\">";
3758                 if ($tag{'type'} eq "tag") {
3759                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3760                 } else {
3761                         print "&nbsp;";
3762                 }
3763                 print "</td>\n" .
3764                       "<td class=\"link\">" . " | " .
3765                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3766                 if ($tag{'reftype'} eq "commit") {
3767                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3768                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3769                 } elsif ($tag{'reftype'} eq "blob") {
3770                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3771                 }
3772                 print "</td>\n" .
3773                       "</tr>";
3774         }
3775         if (defined $extra) {
3776                 print "<tr>\n" .
3777                       "<td colspan=\"5\">$extra</td>\n" .
3778                       "</tr>\n";
3779         }
3780         print "</table>\n";
3781 }
3782
3783 sub git_heads_body {
3784         # uses global variable $project
3785         my ($headlist, $head, $from, $to, $extra) = @_;
3786         $from = 0 unless defined $from;
3787         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3788
3789         print "<table class=\"heads\">\n";
3790         my $alternate = 1;
3791         for (my $i = $from; $i <= $to; $i++) {
3792                 my $entry = $headlist->[$i];
3793                 my %ref = %$entry;
3794                 my $curr = $ref{'id'} eq $head;
3795                 if ($alternate) {
3796                         print "<tr class=\"dark\">\n";
3797                 } else {
3798                         print "<tr class=\"light\">\n";
3799                 }
3800                 $alternate ^= 1;
3801                 print "<td><i>$ref{'age'}</i></td>\n" .
3802                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3803                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3804                                -class => "list name"},esc_html($ref{'name'})) .
3805                       "</td>\n" .
3806                       "<td class=\"link\">" .
3807                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3808                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3809                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3810                       "</td>\n" .
3811                       "</tr>";
3812         }
3813         if (defined $extra) {
3814                 print "<tr>\n" .
3815                       "<td colspan=\"3\">$extra</td>\n" .
3816                       "</tr>\n";
3817         }
3818         print "</table>\n";
3819 }
3820
3821 sub git_search_grep_body {
3822         my ($commitlist, $from, $to, $extra) = @_;
3823         $from = 0 unless defined $from;
3824         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3825
3826         print "<table class=\"commit_search\">\n";
3827         my $alternate = 1;
3828         for (my $i = $from; $i <= $to; $i++) {
3829                 my %co = %{$commitlist->[$i]};
3830                 if (!%co) {
3831                         next;
3832                 }
3833                 my $commit = $co{'id'};
3834                 if ($alternate) {
3835                         print "<tr class=\"dark\">\n";
3836                 } else {
3837                         print "<tr class=\"light\">\n";
3838                 }
3839                 $alternate ^= 1;
3840                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3841                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3842                       "<td><i>" . $author . "</i></td>\n" .
3843                       "<td>" .
3844                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3845                                -class => "list subject"},
3846                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3847                 my $comment = $co{'comment'};
3848                 foreach my $line (@$comment) {
3849                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3850                                 my ($lead, $match, $trail) = ($1, $2, $3);
3851                                 $match = chop_str($match, 70, 5, 'center');
3852                                 my $contextlen = int((80 - length($match))/2);
3853                                 $contextlen = 30 if ($contextlen > 30);
3854                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3855                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3856
3857                                 $lead  = esc_html($lead);
3858                                 $match = esc_html($match);
3859                                 $trail = esc_html($trail);
3860
3861                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3862                         }
3863                 }
3864                 print "</td>\n" .
3865                       "<td class=\"link\">" .
3866                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3867                       " | " .
3868                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3869                       " | " .
3870                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3871                 print "</td>\n" .
3872                       "</tr>\n";
3873         }
3874         if (defined $extra) {
3875                 print "<tr>\n" .
3876                       "<td colspan=\"3\">$extra</td>\n" .
3877                       "</tr>\n";
3878         }
3879         print "</table>\n";
3880 }
3881
3882 ## ======================================================================
3883 ## ======================================================================
3884 ## actions
3885
3886 sub git_project_list {
3887         my $order = $cgi->param('o');
3888         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3889                 die_error(undef, "Unknown order parameter");
3890         }
3891
3892         my @list = git_get_projects_list();
3893         if (!@list) {
3894                 die_error(undef, "No projects found");
3895         }
3896
3897         git_header_html();
3898         if (-f $home_text) {
3899                 print "<div class=\"index_include\">\n";
3900                 open (my $fd, $home_text);
3901                 print <$fd>;
3902                 close $fd;
3903                 print "</div>\n";
3904         }
3905         git_project_list_body(\@list, $order);
3906         git_footer_html();
3907 }
3908
3909 sub git_forks {
3910         my $order = $cgi->param('o');
3911         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3912                 die_error(undef, "Unknown order parameter");
3913         }
3914
3915         my @list = git_get_projects_list($project);
3916         if (!@list) {
3917                 die_error(undef, "No forks found");
3918         }
3919
3920         git_header_html();
3921         git_print_page_nav('','');
3922         git_print_header_div('summary', "$project forks");
3923         git_project_list_body(\@list, $order);
3924         git_footer_html();
3925 }
3926
3927 sub git_project_index {
3928         my @projects = git_get_projects_list($project);
3929
3930         print $cgi->header(
3931                 -type => 'text/plain',
3932                 -charset => 'utf-8',
3933                 -content_disposition => 'inline; filename="index.aux"');
3934
3935         foreach my $pr (@projects) {
3936                 if (!exists $pr->{'owner'}) {
3937                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3938                 }
3939
3940                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3941                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3942                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3943                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3944                 $path  =~ s/ /\+/g;
3945                 $owner =~ s/ /\+/g;
3946
3947                 print "$path $owner\n";
3948         }
3949 }
3950
3951 sub git_summary {
3952         my $descr = git_get_project_description($project) || "none";
3953         my %co = parse_commit("HEAD");
3954         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3955         my $head = $co{'id'};
3956
3957         my $owner = git_get_project_owner($project);
3958
3959         my $refs = git_get_references();
3960         # These get_*_list functions return one more to allow us to see if
3961         # there are more ...
3962         my @taglist  = git_get_tags_list(16);
3963         my @headlist = git_get_heads_list(16);
3964         my @forklist;
3965         my ($check_forks) = gitweb_check_feature('forks');
3966
3967         if ($check_forks) {
3968                 @forklist = git_get_projects_list($project);
3969         }
3970
3971         git_header_html();
3972         git_print_page_nav('summary','', $head);
3973
3974         print "<div class=\"title\">&nbsp;</div>\n";
3975         print "<table class=\"projects_list\">\n" .
3976               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3977               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3978         if (defined $cd{'rfc2822'}) {
3979                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3980         }
3981
3982         # use per project git URL list in $projectroot/$project/cloneurl
3983         # or make project git URL from git base URL and project name
3984         my $url_tag = "URL";
3985         my @url_list = git_get_project_url_list($project);
3986         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3987         foreach my $git_url (@url_list) {
3988                 next unless $git_url;
3989                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3990                 $url_tag = "";
3991         }
3992         print "</table>\n";
3993
3994         if (-s "$projectroot/$project/README.html") {
3995                 if (open my $fd, "$projectroot/$project/README.html") {
3996                         print "<div class=\"title\">readme</div>\n" .
3997                               "<div class=\"readme\">\n";
3998                         print $_ while (<$fd>);
3999                         print "\n</div>\n"; # class="readme"
4000                         close $fd;
4001                 }
4002         }
4003
4004         # we need to request one more than 16 (0..15) to check if
4005         # those 16 are all
4006         my @commitlist = $head ? parse_commits($head, 17) : ();
4007         if (@commitlist) {
4008                 git_print_header_div('shortlog');
4009                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4010                                   $#commitlist <=  15 ? undef :
4011                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4012         }
4013
4014         if (@taglist) {
4015                 git_print_header_div('tags');
4016                 git_tags_body(\@taglist, 0, 15,
4017                               $#taglist <=  15 ? undef :
4018                               $cgi->a({-href => href(action=>"tags")}, "..."));
4019         }
4020
4021         if (@headlist) {
4022                 git_print_header_div('heads');
4023                 git_heads_body(\@headlist, $head, 0, 15,
4024                                $#headlist <= 15 ? undef :
4025                                $cgi->a({-href => href(action=>"heads")}, "..."));
4026         }
4027
4028         if (@forklist) {
4029                 git_print_header_div('forks');
4030                 git_project_list_body(\@forklist, undef, 0, 15,
4031                                       $#forklist <= 15 ? undef :
4032                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4033                                       'noheader');
4034         }
4035
4036         git_footer_html();
4037 }
4038
4039 sub git_tag {
4040         my $head = git_get_head_hash($project);
4041         git_header_html();
4042         git_print_page_nav('','', $head,undef,$head);
4043         my %tag = parse_tag($hash);
4044
4045         if (! %tag) {
4046                 die_error(undef, "Unknown tag object");
4047         }
4048
4049         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4050         print "<div class=\"title_text\">\n" .
4051               "<table class=\"object_header\">\n" .
4052               "<tr>\n" .
4053               "<td>object</td>\n" .
4054               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4055                                $tag{'object'}) . "</td>\n" .
4056               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4057                                               $tag{'type'}) . "</td>\n" .
4058               "</tr>\n";
4059         if (defined($tag{'author'})) {
4060                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4061                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4062                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4063                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4064                         "</td></tr>\n";
4065         }
4066         print "</table>\n\n" .
4067               "</div>\n";
4068         print "<div class=\"page_body\">";
4069         my $comment = $tag{'comment'};
4070         foreach my $line (@$comment) {
4071                 chomp $line;
4072                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4073         }
4074         print "</div>\n";
4075         git_footer_html();
4076 }
4077
4078 sub git_blame2 {
4079         my $fd;
4080         my $ftype;
4081
4082         my ($have_blame) = gitweb_check_feature('blame');
4083         if (!$have_blame) {
4084                 die_error('403 Permission denied', "Permission denied");
4085         }
4086         die_error('404 Not Found', "File name not defined") if (!$file_name);
4087         $hash_base ||= git_get_head_hash($project);
4088         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4089         my %co = parse_commit($hash_base)
4090                 or die_error(undef, "Reading commit failed");
4091         if (!defined $hash) {
4092                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4093                         or die_error(undef, "Error looking up file");
4094         }
4095         $ftype = git_get_type($hash);
4096         if ($ftype !~ "blob") {
4097                 die_error('400 Bad Request', "Object is not a blob");
4098         }
4099         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4100               $file_name, $hash_base)
4101                 or die_error(undef, "Open git-blame failed");
4102         git_header_html();
4103         my $formats_nav =
4104                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4105                         "blob") .
4106                 " | " .
4107                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4108                         "history") .
4109                 " | " .
4110                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4111                         "HEAD");
4112         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4113         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4114         git_print_page_path($file_name, $ftype, $hash_base);
4115         my @rev_color = (qw(light2 dark2));
4116         my $num_colors = scalar(@rev_color);
4117         my $current_color = 0;
4118         my $last_rev;
4119         print <<HTML;
4120 <div class="page_body">
4121 <table class="blame">
4122 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4123 HTML
4124         my %metainfo = ();
4125         while (1) {
4126                 $_ = <$fd>;
4127                 last unless defined $_;
4128                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4129                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4130                 if (!exists $metainfo{$full_rev}) {
4131                         $metainfo{$full_rev} = {};
4132                 }
4133                 my $meta = $metainfo{$full_rev};
4134                 while (<$fd>) {
4135                         last if (s/^\t//);
4136                         if (/^(\S+) (.*)$/) {
4137                                 $meta->{$1} = $2;
4138                         }
4139                 }
4140                 my $data = $_;
4141                 chomp $data;
4142                 my $rev = substr($full_rev, 0, 8);
4143                 my $author = $meta->{'author'};
4144                 my %date = parse_date($meta->{'author-time'},
4145                                       $meta->{'author-tz'});
4146                 my $date = $date{'iso-tz'};
4147                 if ($group_size) {
4148                         $current_color = ++$current_color % $num_colors;
4149                 }
4150                 print "<tr class=\"$rev_color[$current_color]\">\n";
4151                 if ($group_size) {
4152                         print "<td class=\"sha1\"";
4153                         print " title=\"". esc_html($author) . ", $date\"";
4154                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4155                         print ">";
4156                         print $cgi->a({-href => href(action=>"commit",
4157                                                      hash=>$full_rev,
4158                                                      file_name=>$file_name)},
4159                                       esc_html($rev));
4160                         print "</td>\n";
4161                 }
4162                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4163                         or die_error(undef, "Open git-rev-parse failed");
4164                 my $parent_commit = <$dd>;
4165                 close $dd;
4166                 chomp($parent_commit);
4167                 my $blamed = href(action => 'blame',
4168                                   file_name => $meta->{'filename'},
4169                                   hash_base => $parent_commit);
4170                 print "<td class=\"linenr\">";
4171                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4172                                 -id => "l$lineno",
4173                                 -class => "linenr" },
4174                               esc_html($lineno));
4175                 print "</td>";
4176                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4177                 print "</tr>\n";
4178         }
4179         print "</table>\n";
4180         print "</div>";
4181         close $fd
4182                 or print "Reading blob failed\n";
4183         git_footer_html();
4184 }
4185
4186 sub git_blame {
4187         my $fd;
4188
4189         my ($have_blame) = gitweb_check_feature('blame');
4190         if (!$have_blame) {
4191                 die_error('403 Permission denied', "Permission denied");
4192         }
4193         die_error('404 Not Found', "File name not defined") if (!$file_name);
4194         $hash_base ||= git_get_head_hash($project);
4195         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4196         my %co = parse_commit($hash_base)
4197                 or die_error(undef, "Reading commit failed");
4198         if (!defined $hash) {
4199                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4200                         or die_error(undef, "Error lookup file");
4201         }
4202         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4203                 or die_error(undef, "Open git-annotate failed");
4204         git_header_html();
4205         my $formats_nav =
4206                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4207                         "blob") .
4208                 " | " .
4209                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4210                         "history") .
4211                 " | " .
4212                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4213                         "HEAD");
4214         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4215         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4216         git_print_page_path($file_name, 'blob', $hash_base);
4217         print "<div class=\"page_body\">\n";
4218         print <<HTML;
4219 <table class="blame">
4220   <tr>
4221     <th>Commit</th>
4222     <th>Age</th>
4223     <th>Author</th>
4224     <th>Line</th>
4225     <th>Data</th>
4226   </tr>
4227 HTML
4228         my @line_class = (qw(light dark));
4229         my $line_class_len = scalar (@line_class);
4230         my $line_class_num = $#line_class;
4231         while (my $line = <$fd>) {
4232                 my $long_rev;
4233                 my $short_rev;
4234                 my $author;
4235                 my $time;
4236                 my $lineno;
4237                 my $data;
4238                 my $age;
4239                 my $age_str;
4240                 my $age_class;
4241
4242                 chomp $line;
4243                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4244
4245                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4246                         $long_rev = $1;
4247                         $author   = $2;
4248                         $time     = $3;
4249                         $lineno   = $4;
4250                         $data     = $5;
4251                 } else {
4252                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4253                         next;
4254                 }
4255                 $short_rev  = substr ($long_rev, 0, 8);
4256                 $age        = time () - $time;
4257                 $age_str    = age_string ($age);
4258                 $age_str    =~ s/ /&nbsp;/g;
4259                 $age_class  = age_class($age);
4260                 $author     = esc_html ($author);
4261                 $author     =~ s/ /&nbsp;/g;
4262
4263                 $data = untabify($data);
4264                 $data = esc_html ($data);
4265
4266                 print <<HTML;
4267   <tr class="$line_class[$line_class_num]">
4268     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4269     <td class="$age_class">$age_str</td>
4270     <td>$author</td>
4271     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4272     <td class="pre">$data</td>
4273   </tr>
4274 HTML
4275         } # while (my $line = <$fd>)
4276         print "</table>\n\n";
4277         close $fd
4278                 or print "Reading blob failed.\n";
4279         print "</div>";
4280         git_footer_html();
4281 }
4282
4283 sub git_tags {
4284         my $head = git_get_head_hash($project);
4285         git_header_html();
4286         git_print_page_nav('','', $head,undef,$head);
4287         git_print_header_div('summary', $project);
4288
4289         my @tagslist = git_get_tags_list();
4290         if (@tagslist) {
4291                 git_tags_body(\@tagslist);
4292         }
4293         git_footer_html();
4294 }
4295
4296 sub git_heads {
4297         my $head = git_get_head_hash($project);
4298         git_header_html();
4299         git_print_page_nav('','', $head,undef,$head);
4300         git_print_header_div('summary', $project);
4301
4302         my @headslist = git_get_heads_list();
4303         if (@headslist) {
4304                 git_heads_body(\@headslist, $head);
4305         }
4306         git_footer_html();
4307 }
4308
4309 sub git_blob_plain {
4310         my $expires;
4311
4312         if (!defined $hash) {
4313                 if (defined $file_name) {
4314                         my $base = $hash_base || git_get_head_hash($project);
4315                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4316                                 or die_error(undef, "Error lookup file");
4317                 } else {
4318                         die_error(undef, "No file name defined");
4319                 }
4320         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4321                 # blobs defined by non-textual hash id's can be cached
4322                 $expires = "+1d";
4323         }
4324
4325         my $type = shift;
4326         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4327                 or die_error(undef, "Couldn't cat $file_name, $hash");
4328
4329         $type ||= blob_mimetype($fd, $file_name);
4330
4331         # save as filename, even when no $file_name is given
4332         my $save_as = "$hash";
4333         if (defined $file_name) {
4334                 $save_as = $file_name;
4335         } elsif ($type =~ m/^text\//) {
4336                 $save_as .= '.txt';
4337         }
4338
4339         print $cgi->header(
4340                 -type => "$type",
4341                 -expires=>$expires,
4342                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4343         undef $/;
4344         binmode STDOUT, ':raw';
4345         print <$fd>;
4346         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4347         $/ = "\n";
4348         close $fd;
4349 }
4350
4351 sub git_blob {
4352         my $expires;
4353
4354         if (!defined $hash) {
4355                 if (defined $file_name) {
4356                         my $base = $hash_base || git_get_head_hash($project);
4357                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4358                                 or die_error(undef, "Error lookup file");
4359                 } else {
4360                         die_error(undef, "No file name defined");
4361                 }
4362         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4363                 # blobs defined by non-textual hash id's can be cached
4364                 $expires = "+1d";
4365         }
4366
4367         my ($have_blame) = gitweb_check_feature('blame');
4368         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4369                 or die_error(undef, "Couldn't cat $file_name, $hash");
4370         my $mimetype = blob_mimetype($fd, $file_name);
4371         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4372                 close $fd;
4373                 return git_blob_plain($mimetype);
4374         }
4375         # we can have blame only for text/* mimetype
4376         $have_blame &&= ($mimetype =~ m!^text/!);
4377
4378         git_header_html(undef, $expires);
4379         my $formats_nav = '';
4380         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4381                 if (defined $file_name) {
4382                         if ($have_blame) {
4383                                 $formats_nav .=
4384                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4385                                                 "blame") .
4386                                         " | ";
4387                         }
4388                         $formats_nav .=
4389                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4390                                         "history") .
4391                                 " | " .
4392                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4393                                         "raw") .
4394                                 " | " .
4395                                 $cgi->a({-href => href(action=>"blob",
4396                                                        hash_base=>"HEAD", file_name=>$file_name)},
4397                                         "HEAD");
4398                 } else {
4399                         $formats_nav .=
4400                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4401                                         "raw");
4402                 }
4403                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4404                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4405         } else {
4406                 print "<div class=\"page_nav\">\n" .
4407                       "<br/><br/></div>\n" .
4408                       "<div class=\"title\">$hash</div>\n";
4409         }
4410         git_print_page_path($file_name, "blob", $hash_base);
4411         print "<div class=\"page_body\">\n";
4412         if ($mimetype =~ m!^image/!) {
4413                 print qq!<img type="$mimetype"!;
4414                 if ($file_name) {
4415                         print qq! alt="$file_name" title="$file_name"!;
4416                 }
4417                 print qq! src="! .
4418                       href(action=>"blob_plain", hash=>$hash,
4419                            hash_base=>$hash_base, file_name=>$file_name) .
4420                       qq!" />\n!;
4421         } else {
4422                 my $nr;
4423                 while (my $line = <$fd>) {
4424                         chomp $line;
4425                         $nr++;
4426                         $line = untabify($line);
4427                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4428                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4429                 }
4430         }
4431         close $fd
4432                 or print "Reading blob failed.\n";
4433         print "</div>";
4434         git_footer_html();
4435 }
4436
4437 sub git_tree {
4438         if (!defined $hash_base) {
4439                 $hash_base = "HEAD";
4440         }
4441         if (!defined $hash) {
4442                 if (defined $file_name) {
4443                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4444                 } else {
4445                         $hash = $hash_base;
4446                 }
4447         }
4448         $/ = "\0";
4449         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4450                 or die_error(undef, "Open git-ls-tree failed");
4451         my @entries = map { chomp; $_ } <$fd>;
4452         close $fd or die_error(undef, "Reading tree failed");
4453         $/ = "\n";
4454
4455         my $refs = git_get_references();
4456         my $ref = format_ref_marker($refs, $hash_base);
4457         git_header_html();
4458         my $basedir = '';
4459         my ($have_blame) = gitweb_check_feature('blame');
4460         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4461                 my @views_nav = ();
4462                 if (defined $file_name) {
4463                         push @views_nav,
4464                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4465                                         "history"),
4466                                 $cgi->a({-href => href(action=>"tree",
4467                                                        hash_base=>"HEAD", file_name=>$file_name)},
4468                                         "HEAD"),
4469                 }
4470                 my $snapshot_links = format_snapshot_links($hash);
4471                 if (defined $snapshot_links) {
4472                         # FIXME: Should be available when we have no hash base as well.
4473                         push @views_nav, $snapshot_links;
4474                 }
4475                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4476                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4477         } else {
4478                 undef $hash_base;
4479                 print "<div class=\"page_nav\">\n";
4480                 print "<br/><br/></div>\n";
4481                 print "<div class=\"title\">$hash</div>\n";
4482         }
4483         if (defined $file_name) {
4484                 $basedir = $file_name;
4485                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4486                         $basedir .= '/';
4487                 }
4488         }
4489         git_print_page_path($file_name, 'tree', $hash_base);
4490         print "<div class=\"page_body\">\n";
4491         print "<table class=\"tree\">\n";
4492         my $alternate = 1;
4493         # '..' (top directory) link if possible
4494         if (defined $hash_base &&
4495             defined $file_name && $file_name =~ m![^/]+$!) {
4496                 if ($alternate) {
4497                         print "<tr class=\"dark\">\n";
4498                 } else {
4499                         print "<tr class=\"light\">\n";
4500                 }
4501                 $alternate ^= 1;
4502
4503                 my $up = $file_name;
4504                 $up =~ s!/?[^/]+$!!;
4505                 undef $up unless $up;
4506                 # based on git_print_tree_entry
4507                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4508                 print '<td class="list">';
4509                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4510                                              file_name=>$up)},
4511                               "..");
4512                 print "</td>\n";
4513                 print "<td class=\"link\"></td>\n";
4514
4515                 print "</tr>\n";
4516         }
4517         foreach my $line (@entries) {
4518                 my %t = parse_ls_tree_line($line, -z => 1);
4519
4520                 if ($alternate) {
4521                         print "<tr class=\"dark\">\n";
4522                 } else {
4523                         print "<tr class=\"light\">\n";
4524                 }
4525                 $alternate ^= 1;
4526
4527                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4528
4529                 print "</tr>\n";
4530         }
4531         print "</table>\n" .
4532               "</div>";
4533         git_footer_html();
4534 }
4535
4536 sub git_snapshot {
4537         my @supported_fmts = gitweb_check_feature('snapshot');
4538         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4539
4540         my $format = $cgi->param('sf');
4541         if (!@supported_fmts) {
4542                 die_error('403 Permission denied', "Permission denied");
4543         }
4544         # default to first supported snapshot format
4545         $format ||= $supported_fmts[0];
4546         if ($format !~ m/^[a-z0-9]+$/) {
4547                 die_error(undef, "Invalid snapshot format parameter");
4548         } elsif (!exists($known_snapshot_formats{$format})) {
4549                 die_error(undef, "Unknown snapshot format");
4550         } elsif (!grep($_ eq $format, @supported_fmts)) {
4551                 die_error(undef, "Unsupported snapshot format");
4552         }
4553
4554         if (!defined $hash) {
4555                 $hash = git_get_head_hash($project);
4556         }
4557
4558         my $name = $project;
4559         $name =~ s,([^/])/*\.git$,$1,;
4560         $name = basename($name);
4561         my $filename = to_utf8($name);
4562         $name =~ s/\047/\047\\\047\047/g;
4563         my $cmd;
4564         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4565         $cmd = quote_command(
4566                 git_cmd(), 'archive',
4567                 "--format=$known_snapshot_formats{$format}{'format'}",
4568                 "--prefix=$name/", $hash);
4569         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4570                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4571         }
4572
4573         print $cgi->header(
4574                 -type => $known_snapshot_formats{$format}{'type'},
4575                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4576                 -status => '200 OK');
4577
4578         open my $fd, "-|", $cmd
4579                 or die_error(undef, "Execute git-archive failed");
4580         binmode STDOUT, ':raw';
4581         print <$fd>;
4582         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4583         close $fd;
4584 }
4585
4586 sub git_log {
4587         my $head = git_get_head_hash($project);
4588         if (!defined $hash) {
4589                 $hash = $head;
4590         }
4591         if (!defined $page) {
4592                 $page = 0;
4593         }
4594         my $refs = git_get_references();
4595
4596         my @commitlist = parse_commits($hash, 101, (100 * $page));
4597
4598         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4599
4600         git_header_html();
4601         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4602
4603         if (!@commitlist) {
4604                 my %co = parse_commit($hash);
4605
4606                 git_print_header_div('summary', $project);
4607                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4608         }
4609         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4610         for (my $i = 0; $i <= $to; $i++) {
4611                 my %co = %{$commitlist[$i]};
4612                 next if !%co;
4613                 my $commit = $co{'id'};
4614                 my $ref = format_ref_marker($refs, $commit);
4615                 my %ad = parse_date($co{'author_epoch'});
4616                 git_print_header_div('commit',
4617                                "<span class=\"age\">$co{'age_string'}</span>" .
4618                                esc_html($co{'title'}) . $ref,
4619                                $commit);
4620                 print "<div class=\"title_text\">\n" .
4621                       "<div class=\"log_link\">\n" .
4622                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4623                       " | " .
4624                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4625                       " | " .
4626                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4627                       "<br/>\n" .
4628                       "</div>\n" .
4629                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4630                       "</div>\n";
4631
4632                 print "<div class=\"log_body\">\n";
4633                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4634                 print "</div>\n";
4635         }
4636         if ($#commitlist >= 100) {
4637                 print "<div class=\"page_nav\">\n";
4638                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4639                                -accesskey => "n", -title => "Alt-n"}, "next");
4640                 print "</div>\n";
4641         }
4642         git_footer_html();
4643 }
4644
4645 sub git_commit {
4646         $hash ||= $hash_base || "HEAD";
4647         my %co = parse_commit($hash);
4648         if (!%co) {
4649                 die_error(undef, "Unknown commit object");
4650         }
4651         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4652         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4653
4654         my $parent  = $co{'parent'};
4655         my $parents = $co{'parents'}; # listref
4656
4657         # we need to prepare $formats_nav before any parameter munging
4658         my $formats_nav;
4659         if (!defined $parent) {
4660                 # --root commitdiff
4661                 $formats_nav .= '(initial)';
4662         } elsif (@$parents == 1) {
4663                 # single parent commit
4664                 $formats_nav .=
4665                         '(parent: ' .
4666                         $cgi->a({-href => href(action=>"commit",
4667                                                hash=>$parent)},
4668                                 esc_html(substr($parent, 0, 7))) .
4669                         ')';
4670         } else {
4671                 # merge commit
4672                 $formats_nav .=
4673                         '(merge: ' .
4674                         join(' ', map {
4675                                 $cgi->a({-href => href(action=>"commit",
4676                                                        hash=>$_)},
4677                                         esc_html(substr($_, 0, 7)));
4678                         } @$parents ) .
4679                         ')';
4680         }
4681
4682         if (!defined $parent) {
4683                 $parent = "--root";
4684         }
4685         my @difftree;
4686         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4687                 @diff_opts,
4688                 (@$parents <= 1 ? $parent : '-c'),
4689                 $hash, "--"
4690                 or die_error(undef, "Open git-diff-tree failed");
4691         @difftree = map { chomp; $_ } <$fd>;
4692         close $fd or die_error(undef, "Reading git-diff-tree failed");
4693
4694         # non-textual hash id's can be cached
4695         my $expires;
4696         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4697                 $expires = "+1d";
4698         }
4699         my $refs = git_get_references();
4700         my $ref = format_ref_marker($refs, $co{'id'});
4701
4702         git_header_html(undef, $expires);
4703         git_print_page_nav('commit', '',
4704                            $hash, $co{'tree'}, $hash,
4705                            $formats_nav);
4706
4707         if (defined $co{'parent'}) {
4708                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4709         } else {
4710                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4711         }
4712         print "<div class=\"title_text\">\n" .
4713               "<table class=\"object_header\">\n";
4714         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4715               "<tr>" .
4716               "<td></td><td> $ad{'rfc2822'}";
4717         if ($ad{'hour_local'} < 6) {
4718                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4719                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4720         } else {
4721                 printf(" (%02d:%02d %s)",
4722                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4723         }
4724         print "</td>" .
4725               "</tr>\n";
4726         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4727         print "<tr><td></td><td> $cd{'rfc2822'}" .
4728               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4729               "</td></tr>\n";
4730         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4731         print "<tr>" .
4732               "<td>tree</td>" .
4733               "<td class=\"sha1\">" .
4734               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4735                        class => "list"}, $co{'tree'}) .
4736               "</td>" .
4737               "<td class=\"link\">" .
4738               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4739                       "tree");
4740         my $snapshot_links = format_snapshot_links($hash);
4741         if (defined $snapshot_links) {
4742                 print " | " . $snapshot_links;
4743         }
4744         print "</td>" .
4745               "</tr>\n";
4746
4747         foreach my $par (@$parents) {
4748                 print "<tr>" .
4749                       "<td>parent</td>" .
4750                       "<td class=\"sha1\">" .
4751                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4752                                class => "list"}, $par) .
4753                       "</td>" .
4754                       "<td class=\"link\">" .
4755                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4756                       " | " .
4757                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4758                       "</td>" .
4759                       "</tr>\n";
4760         }
4761         print "</table>".
4762               "</div>\n";
4763
4764         print "<div class=\"page_body\">\n";
4765         git_print_log($co{'comment'});
4766         print "</div>\n";
4767
4768         git_difftree_body(\@difftree, $hash, @$parents);
4769
4770         git_footer_html();
4771 }
4772
4773 sub git_object {
4774         # object is defined by:
4775         # - hash or hash_base alone
4776         # - hash_base and file_name
4777         my $type;
4778
4779         # - hash or hash_base alone
4780         if ($hash || ($hash_base && !defined $file_name)) {
4781                 my $object_id = $hash || $hash_base;
4782
4783                 open my $fd, "-|", quote_command(
4784                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4785                         or die_error('404 Not Found', "Object does not exist");
4786                 $type = <$fd>;
4787                 chomp $type;
4788                 close $fd
4789                         or die_error('404 Not Found', "Object does not exist");
4790
4791         # - hash_base and file_name
4792         } elsif ($hash_base && defined $file_name) {
4793                 $file_name =~ s,/+$,,;
4794
4795                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4796                         or die_error('404 Not Found', "Base object does not exist");
4797
4798                 # here errors should not hapen
4799                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4800                         or die_error(undef, "Open git-ls-tree failed");
4801                 my $line = <$fd>;
4802                 close $fd;
4803
4804                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4805                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4806                         die_error('404 Not Found', "File or directory for given base does not exist");
4807                 }
4808                 $type = $2;
4809                 $hash = $3;
4810         } else {
4811                 die_error('404 Not Found', "Not enough information to find object");
4812         }
4813
4814         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4815                                           hash=>$hash, hash_base=>$hash_base,
4816                                           file_name=>$file_name),
4817                              -status => '302 Found');
4818 }
4819
4820 sub git_blobdiff {
4821         my $format = shift || 'html';
4822
4823         my $fd;
4824         my @difftree;
4825         my %diffinfo;
4826         my $expires;
4827
4828         # preparing $fd and %diffinfo for git_patchset_body
4829         # new style URI
4830         if (defined $hash_base && defined $hash_parent_base) {
4831                 if (defined $file_name) {
4832                         # read raw output
4833                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4834                                 $hash_parent_base, $hash_base,
4835                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4836                                 or die_error(undef, "Open git-diff-tree failed");
4837                         @difftree = map { chomp; $_ } <$fd>;
4838                         close $fd
4839                                 or die_error(undef, "Reading git-diff-tree failed");
4840                         @difftree
4841                                 or die_error('404 Not Found', "Blob diff not found");
4842
4843                 } elsif (defined $hash &&
4844                          $hash =~ /[0-9a-fA-F]{40}/) {
4845                         # try to find filename from $hash
4846
4847                         # read filtered raw output
4848                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4849                                 $hash_parent_base, $hash_base, "--"
4850                                 or die_error(undef, "Open git-diff-tree failed");
4851                         @difftree =
4852                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4853                                 # $hash == to_id
4854                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4855                                 map { chomp; $_ } <$fd>;
4856                         close $fd
4857                                 or die_error(undef, "Reading git-diff-tree failed");
4858                         @difftree
4859                                 or die_error('404 Not Found', "Blob diff not found");
4860
4861                 } else {
4862                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4863                 }
4864
4865                 if (@difftree > 1) {
4866                         die_error('404 Not Found', "Ambiguous blob diff specification");
4867                 }
4868
4869                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4870                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4871                 $file_name   ||= $diffinfo{'to_file'};
4872
4873                 $hash_parent ||= $diffinfo{'from_id'};
4874                 $hash        ||= $diffinfo{'to_id'};
4875
4876                 # non-textual hash id's can be cached
4877                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4878                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4879                         $expires = '+1d';
4880                 }
4881
4882                 # open patch output
4883                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4884                         '-p', ($format eq 'html' ? "--full-index" : ()),
4885                         $hash_parent_base, $hash_base,
4886                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4887                         or die_error(undef, "Open git-diff-tree failed");
4888         }
4889
4890         # old/legacy style URI -- not generated anymore since 1.4.3.
4891         if (!%diffinfo) {
4892                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4893         }
4894
4895         # header
4896         if ($format eq 'html') {
4897                 my $formats_nav =
4898                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4899                                 "raw");
4900                 git_header_html(undef, $expires);
4901                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4902                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4903                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4904                 } else {
4905                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4906                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4907                 }
4908                 if (defined $file_name) {
4909                         git_print_page_path($file_name, "blob", $hash_base);
4910                 } else {
4911                         print "<div class=\"page_path\"></div>\n";
4912                 }
4913
4914         } elsif ($format eq 'plain') {
4915                 print $cgi->header(
4916                         -type => 'text/plain',
4917                         -charset => 'utf-8',
4918                         -expires => $expires,
4919                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4920
4921                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4922
4923         } else {
4924                 die_error(undef, "Unknown blobdiff format");
4925         }
4926
4927         # patch
4928         if ($format eq 'html') {
4929                 print "<div class=\"page_body\">\n";
4930
4931                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4932                 close $fd;
4933
4934                 print "</div>\n"; # class="page_body"
4935                 git_footer_html();
4936
4937         } else {
4938                 while (my $line = <$fd>) {
4939                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4940                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4941
4942                         print $line;
4943
4944                         last if $line =~ m!^\+\+\+!;
4945                 }
4946                 local $/ = undef;
4947                 print <$fd>;
4948                 close $fd;
4949         }
4950 }
4951
4952 sub git_blobdiff_plain {
4953         git_blobdiff('plain');
4954 }
4955
4956 sub git_commitdiff {
4957         my $format = shift || 'html';
4958         $hash ||= $hash_base || "HEAD";
4959         my %co = parse_commit($hash);
4960         if (!%co) {
4961                 die_error(undef, "Unknown commit object");
4962         }
4963
4964         # choose format for commitdiff for merge
4965         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4966                 $hash_parent = '--cc';
4967         }
4968         # we need to prepare $formats_nav before almost any parameter munging
4969         my $formats_nav;
4970         if ($format eq 'html') {
4971                 $formats_nav =
4972                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
4973                                 "raw");
4974
4975                 if (defined $hash_parent &&
4976                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
4977                         # commitdiff with two commits given
4978                         my $hash_parent_short = $hash_parent;
4979                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4980                                 $hash_parent_short = substr($hash_parent, 0, 7);
4981                         }
4982                         $formats_nav .=
4983                                 ' (from';
4984                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
4985                                 if ($co{'parents'}[$i] eq $hash_parent) {
4986                                         $formats_nav .= ' parent ' . ($i+1);
4987                                         last;
4988                                 }
4989                         }
4990                         $formats_nav .= ': ' .
4991                                 $cgi->a({-href => href(action=>"commitdiff",
4992                                                        hash=>$hash_parent)},
4993                                         esc_html($hash_parent_short)) .
4994                                 ')';
4995                 } elsif (!$co{'parent'}) {
4996                         # --root commitdiff
4997                         $formats_nav .= ' (initial)';
4998                 } elsif (scalar @{$co{'parents'}} == 1) {
4999                         # single parent commit
5000                         $formats_nav .=
5001                                 ' (parent: ' .
5002                                 $cgi->a({-href => href(action=>"commitdiff",
5003                                                        hash=>$co{'parent'})},
5004                                         esc_html(substr($co{'parent'}, 0, 7))) .
5005                                 ')';
5006                 } else {
5007                         # merge commit
5008                         if ($hash_parent eq '--cc') {
5009                                 $formats_nav .= ' | ' .
5010                                         $cgi->a({-href => href(action=>"commitdiff",
5011                                                                hash=>$hash, hash_parent=>'-c')},
5012                                                 'combined');
5013                         } else { # $hash_parent eq '-c'
5014                                 $formats_nav .= ' | ' .
5015                                         $cgi->a({-href => href(action=>"commitdiff",
5016                                                                hash=>$hash, hash_parent=>'--cc')},
5017                                                 'compact');
5018                         }
5019                         $formats_nav .=
5020                                 ' (merge: ' .
5021                                 join(' ', map {
5022                                         $cgi->a({-href => href(action=>"commitdiff",
5023                                                                hash=>$_)},
5024                                                 esc_html(substr($_, 0, 7)));
5025                                 } @{$co{'parents'}} ) .
5026                                 ')';
5027                 }
5028         }
5029
5030         my $hash_parent_param = $hash_parent;
5031         if (!defined $hash_parent_param) {
5032                 # --cc for multiple parents, --root for parentless
5033                 $hash_parent_param =
5034                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5035         }
5036
5037         # read commitdiff
5038         my $fd;
5039         my @difftree;
5040         if ($format eq 'html') {
5041                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5042                         "--no-commit-id", "--patch-with-raw", "--full-index",
5043                         $hash_parent_param, $hash, "--"
5044                         or die_error(undef, "Open git-diff-tree failed");
5045
5046                 while (my $line = <$fd>) {
5047                         chomp $line;
5048                         # empty line ends raw part of diff-tree output
5049                         last unless $line;
5050                         push @difftree, scalar parse_difftree_raw_line($line);
5051                 }
5052
5053         } elsif ($format eq 'plain') {
5054                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5055                         '-p', $hash_parent_param, $hash, "--"
5056                         or die_error(undef, "Open git-diff-tree failed");
5057
5058         } else {
5059                 die_error(undef, "Unknown commitdiff format");
5060         }
5061
5062         # non-textual hash id's can be cached
5063         my $expires;
5064         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5065                 $expires = "+1d";
5066         }
5067
5068         # write commit message
5069         if ($format eq 'html') {
5070                 my $refs = git_get_references();
5071                 my $ref = format_ref_marker($refs, $co{'id'});
5072
5073                 git_header_html(undef, $expires);
5074                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5075                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5076                 git_print_authorship(\%co);
5077                 print "<div class=\"page_body\">\n";
5078                 if (@{$co{'comment'}} > 1) {
5079                         print "<div class=\"log\">\n";
5080                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5081                         print "</div>\n"; # class="log"
5082                 }
5083
5084         } elsif ($format eq 'plain') {
5085                 my $refs = git_get_references("tags");
5086                 my $tagname = git_get_rev_name_tags($hash);
5087                 my $filename = basename($project) . "-$hash.patch";
5088
5089                 print $cgi->header(
5090                         -type => 'text/plain',
5091                         -charset => 'utf-8',
5092                         -expires => $expires,
5093                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5094                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5095                 print "From: " . to_utf8($co{'author'}) . "\n";
5096                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5097                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5098
5099                 print "X-Git-Tag: $tagname\n" if $tagname;
5100                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5101
5102                 foreach my $line (@{$co{'comment'}}) {
5103                         print to_utf8($line) . "\n";
5104                 }
5105                 print "---\n\n";
5106         }
5107
5108         # write patch
5109         if ($format eq 'html') {
5110                 my $use_parents = !defined $hash_parent ||
5111                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5112                 git_difftree_body(\@difftree, $hash,
5113                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5114                 print "<br/>\n";
5115
5116                 git_patchset_body($fd, \@difftree, $hash,
5117                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5118                 close $fd;
5119                 print "</div>\n"; # class="page_body"
5120                 git_footer_html();
5121
5122         } elsif ($format eq 'plain') {
5123                 local $/ = undef;
5124                 print <$fd>;
5125                 close $fd
5126                         or print "Reading git-diff-tree failed\n";
5127         }
5128 }
5129
5130 sub git_commitdiff_plain {
5131         git_commitdiff('plain');
5132 }
5133
5134 sub git_history {
5135         if (!defined $hash_base) {
5136                 $hash_base = git_get_head_hash($project);
5137         }
5138         if (!defined $page) {
5139                 $page = 0;
5140         }
5141         my $ftype;
5142         my %co = parse_commit($hash_base);
5143         if (!%co) {
5144                 die_error(undef, "Unknown commit object");
5145         }
5146
5147         my $refs = git_get_references();
5148         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5149
5150         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5151                                        $file_name, "--full-history");
5152         if (!@commitlist) {
5153                 die_error('404 Not Found', "No such file or directory on given branch");
5154         }
5155
5156         if (!defined $hash && defined $file_name) {
5157                 # some commits could have deleted file in question,
5158                 # and not have it in tree, but one of them has to have it
5159                 for (my $i = 0; $i <= @commitlist; $i++) {
5160                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5161                         last if defined $hash;
5162                 }
5163         }
5164         if (defined $hash) {
5165                 $ftype = git_get_type($hash);
5166         }
5167         if (!defined $ftype) {
5168                 die_error(undef, "Unknown type of object");
5169         }
5170
5171         my $paging_nav = '';
5172         if ($page > 0) {
5173                 $paging_nav .=
5174                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5175                                                file_name=>$file_name)},
5176                                 "first");
5177                 $paging_nav .= " &sdot; " .
5178                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5179                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5180         } else {
5181                 $paging_nav .= "first";
5182                 $paging_nav .= " &sdot; prev";
5183         }
5184         my $next_link = '';
5185         if ($#commitlist >= 100) {
5186                 $next_link =
5187                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5188                                  -accesskey => "n", -title => "Alt-n"}, "next");
5189                 $paging_nav .= " &sdot; $next_link";
5190         } else {
5191                 $paging_nav .= " &sdot; next";
5192         }
5193
5194         git_header_html();
5195         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5196         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5197         git_print_page_path($file_name, $ftype, $hash_base);
5198
5199         git_history_body(\@commitlist, 0, 99,
5200                          $refs, $hash_base, $ftype, $next_link);
5201
5202         git_footer_html();
5203 }
5204
5205 sub git_search {
5206         my ($have_search) = gitweb_check_feature('search');
5207         if (!$have_search) {
5208                 die_error('403 Permission denied', "Permission denied");
5209         }
5210         if (!defined $searchtext) {
5211                 die_error(undef, "Text field empty");
5212         }
5213         if (!defined $hash) {
5214                 $hash = git_get_head_hash($project);
5215         }
5216         my %co = parse_commit($hash);
5217         if (!%co) {
5218                 die_error(undef, "Unknown commit object");
5219         }
5220         if (!defined $page) {
5221                 $page = 0;
5222         }
5223
5224         $searchtype ||= 'commit';
5225         if ($searchtype eq 'pickaxe') {
5226                 # pickaxe may take all resources of your box and run for several minutes
5227                 # with every query - so decide by yourself how public you make this feature
5228                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5229                 if (!$have_pickaxe) {
5230                         die_error('403 Permission denied', "Permission denied");
5231                 }
5232         }
5233         if ($searchtype eq 'grep') {
5234                 my ($have_grep) = gitweb_check_feature('grep');
5235                 if (!$have_grep) {
5236                         die_error('403 Permission denied', "Permission denied");
5237                 }
5238         }
5239
5240         git_header_html();
5241
5242         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5243                 my $greptype;
5244                 if ($searchtype eq 'commit') {
5245                         $greptype = "--grep=";
5246                 } elsif ($searchtype eq 'author') {
5247                         $greptype = "--author=";
5248                 } elsif ($searchtype eq 'committer') {
5249                         $greptype = "--committer=";
5250                 }
5251                 $greptype .= $searchtext;
5252                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5253                                                $greptype, '--regexp-ignore-case',
5254                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5255
5256                 my $paging_nav = '';
5257                 if ($page > 0) {
5258                         $paging_nav .=
5259                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5260                                                        searchtext=>$searchtext,
5261                                                        searchtype=>$searchtype)},
5262                                         "first");
5263                         $paging_nav .= " &sdot; " .
5264                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5265                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5266                 } else {
5267                         $paging_nav .= "first";
5268                         $paging_nav .= " &sdot; prev";
5269                 }
5270                 my $next_link = '';
5271                 if ($#commitlist >= 100) {
5272                         $next_link =
5273                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5274                                          -accesskey => "n", -title => "Alt-n"}, "next");
5275                         $paging_nav .= " &sdot; $next_link";
5276                 } else {
5277                         $paging_nav .= " &sdot; next";
5278                 }
5279
5280                 if ($#commitlist >= 100) {
5281                 }
5282
5283                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5284                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5285                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5286         }
5287
5288         if ($searchtype eq 'pickaxe') {
5289                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5290                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5291
5292                 print "<table class=\"pickaxe search\">\n";
5293                 my $alternate = 1;
5294                 $/ = "\n";
5295                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5296                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5297                         ($search_use_regexp ? '--pickaxe-regex' : ());
5298                 undef %co;
5299                 my @files;
5300                 while (my $line = <$fd>) {
5301                         chomp $line;
5302                         next unless $line;
5303
5304                         my %set = parse_difftree_raw_line($line);
5305                         if (defined $set{'commit'}) {
5306                                 # finish previous commit
5307                                 if (%co) {
5308                                         print "</td>\n" .
5309                                               "<td class=\"link\">" .
5310                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5311                                               " | " .
5312                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5313                                         print "</td>\n" .
5314                                               "</tr>\n";
5315                                 }
5316
5317                                 if ($alternate) {
5318                                         print "<tr class=\"dark\">\n";
5319                                 } else {
5320                                         print "<tr class=\"light\">\n";
5321                                 }
5322                                 $alternate ^= 1;
5323                                 %co = parse_commit($set{'commit'});
5324                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5325                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5326                                       "<td><i>$author</i></td>\n" .
5327                                       "<td>" .
5328                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5329                                               -class => "list subject"},
5330                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5331                         } elsif (defined $set{'to_id'}) {
5332                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5333
5334                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5335                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5336                                               -class => "list"},
5337                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5338                                       "<br/>\n";
5339                         }
5340                 }
5341                 close $fd;
5342
5343                 # finish last commit (warning: repetition!)
5344                 if (%co) {
5345                         print "</td>\n" .
5346                               "<td class=\"link\">" .
5347                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5348                               " | " .
5349                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5350                         print "</td>\n" .
5351                               "</tr>\n";
5352                 }
5353
5354                 print "</table>\n";
5355         }
5356
5357         if ($searchtype eq 'grep') {
5358                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5359                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5360
5361                 print "<table class=\"grep_search\">\n";
5362                 my $alternate = 1;
5363                 my $matches = 0;
5364                 $/ = "\n";
5365                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5366                         $search_use_regexp ? ('-E', '-i') : '-F',
5367                         $searchtext, $co{'tree'};
5368                 my $lastfile = '';
5369                 while (my $line = <$fd>) {
5370                         chomp $line;
5371                         my ($file, $lno, $ltext, $binary);
5372                         last if ($matches++ > 1000);
5373                         if ($line =~ /^Binary file (.+) matches$/) {
5374                                 $file = $1;
5375                                 $binary = 1;
5376                         } else {
5377                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5378                         }
5379                         if ($file ne $lastfile) {
5380                                 $lastfile and print "</td></tr>\n";
5381                                 if ($alternate++) {
5382                                         print "<tr class=\"dark\">\n";
5383                                 } else {
5384                                         print "<tr class=\"light\">\n";
5385                                 }
5386                                 print "<td class=\"list\">".
5387                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5388                                                                file_name=>"$file"),
5389                                                 -class => "list"}, esc_path($file));
5390                                 print "</td><td>\n";
5391                                 $lastfile = $file;
5392                         }
5393                         if ($binary) {
5394                                 print "<div class=\"binary\">Binary file</div>\n";
5395                         } else {
5396                                 $ltext = untabify($ltext);
5397                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5398                                         $ltext = esc_html($1, -nbsp=>1);
5399                                         $ltext .= '<span class="match">';
5400                                         $ltext .= esc_html($2, -nbsp=>1);
5401                                         $ltext .= '</span>';
5402                                         $ltext .= esc_html($3, -nbsp=>1);
5403                                 } else {
5404                                         $ltext = esc_html($ltext, -nbsp=>1);
5405                                 }
5406                                 print "<div class=\"pre\">" .
5407                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5408                                                                file_name=>"$file").'#l'.$lno,
5409                                                 -class => "linenr"}, sprintf('%4i', $lno))
5410                                         . ' ' .  $ltext . "</div>\n";
5411                         }
5412                 }
5413                 if ($lastfile) {
5414                         print "</td></tr>\n";
5415                         if ($matches > 1000) {
5416                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5417                         }
5418                 } else {
5419                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5420                 }
5421                 close $fd;
5422
5423                 print "</table>\n";
5424         }
5425         git_footer_html();
5426 }
5427
5428 sub git_search_help {
5429         git_header_html();
5430         git_print_page_nav('','', $hash,$hash,$hash);
5431         print <<EOT;
5432 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5433 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5434 the pattern entered is recognized as the POSIX extended
5435 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5436 insensitive).</p>
5437 <dl>
5438 <dt><b>commit</b></dt>
5439 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5440 EOT
5441         my ($have_grep) = gitweb_check_feature('grep');
5442         if ($have_grep) {
5443                 print <<EOT;
5444 <dt><b>grep</b></dt>
5445 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5446     a different one) are searched for the given pattern. On large trees, this search can take
5447 a while and put some strain on the server, so please use it with some consideration. Note that
5448 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5449 case-sensitive.</dd>
5450 EOT
5451         }
5452         print <<EOT;
5453 <dt><b>author</b></dt>
5454 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5455 <dt><b>committer</b></dt>
5456 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5457 EOT
5458         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5459         if ($have_pickaxe) {
5460                 print <<EOT;
5461 <dt><b>pickaxe</b></dt>
5462 <dd>All commits that caused the string to appear or disappear from any file (changes that
5463 added, removed or "modified" the string) will be listed. This search can take a while and
5464 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5465 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5466 EOT
5467         }
5468         print "</dl>\n";
5469         git_footer_html();
5470 }
5471
5472 sub git_shortlog {
5473         my $head = git_get_head_hash($project);
5474         if (!defined $hash) {
5475                 $hash = $head;
5476         }
5477         if (!defined $page) {
5478                 $page = 0;
5479         }
5480         my $refs = git_get_references();
5481
5482         my @commitlist = parse_commits($hash, 101, (100 * $page));
5483
5484         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5485         my $next_link = '';
5486         if ($#commitlist >= 100) {
5487                 $next_link =
5488                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5489                                  -accesskey => "n", -title => "Alt-n"}, "next");
5490         }
5491
5492         git_header_html();
5493         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5494         git_print_header_div('summary', $project);
5495
5496         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5497
5498         git_footer_html();
5499 }
5500
5501 ## ......................................................................
5502 ## feeds (RSS, Atom; OPML)
5503
5504 sub git_feed {
5505         my $format = shift || 'atom';
5506         my ($have_blame) = gitweb_check_feature('blame');
5507
5508         # Atom: http://www.atomenabled.org/developers/syndication/
5509         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5510         if ($format ne 'rss' && $format ne 'atom') {
5511                 die_error(undef, "Unknown web feed format");
5512         }
5513
5514         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5515         my $head = $hash || 'HEAD';
5516         my @commitlist = parse_commits($head, 150, 0, $file_name);
5517
5518         my %latest_commit;
5519         my %latest_date;
5520         my $content_type = "application/$format+xml";
5521         if (defined $cgi->http('HTTP_ACCEPT') &&
5522                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5523                 # browser (feed reader) prefers text/xml
5524                 $content_type = 'text/xml';
5525         }
5526         if (defined($commitlist[0])) {
5527                 %latest_commit = %{$commitlist[0]};
5528                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5529                 print $cgi->header(
5530                         -type => $content_type,
5531                         -charset => 'utf-8',
5532                         -last_modified => $latest_date{'rfc2822'});
5533         } else {
5534                 print $cgi->header(
5535                         -type => $content_type,
5536                         -charset => 'utf-8');
5537         }
5538
5539         # Optimization: skip generating the body if client asks only
5540         # for Last-Modified date.
5541         return if ($cgi->request_method() eq 'HEAD');
5542
5543         # header variables
5544         my $title = "$site_name - $project/$action";
5545         my $feed_type = 'log';
5546         if (defined $hash) {
5547                 $title .= " - '$hash'";
5548                 $feed_type = 'branch log';
5549                 if (defined $file_name) {
5550                         $title .= " :: $file_name";
5551                         $feed_type = 'history';
5552                 }
5553         } elsif (defined $file_name) {
5554                 $title .= " - $file_name";
5555                 $feed_type = 'history';
5556         }
5557         $title .= " $feed_type";
5558         my $descr = git_get_project_description($project);
5559         if (defined $descr) {
5560                 $descr = esc_html($descr);
5561         } else {
5562                 $descr = "$project " .
5563                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5564                          " feed";
5565         }
5566         my $owner = git_get_project_owner($project);
5567         $owner = esc_html($owner);
5568
5569         #header
5570         my $alt_url;
5571         if (defined $file_name) {
5572                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5573         } elsif (defined $hash) {
5574                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5575         } else {
5576                 $alt_url = href(-full=>1, action=>"summary");
5577         }
5578         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5579         if ($format eq 'rss') {
5580                 print <<XML;
5581 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5582 <channel>
5583 XML
5584                 print "<title>$title</title>\n" .
5585                       "<link>$alt_url</link>\n" .
5586                       "<description>$descr</description>\n" .
5587                       "<language>en</language>\n";
5588         } elsif ($format eq 'atom') {
5589                 print <<XML;
5590 <feed xmlns="http://www.w3.org/2005/Atom">
5591 XML
5592                 print "<title>$title</title>\n" .
5593                       "<subtitle>$descr</subtitle>\n" .
5594                       '<link rel="alternate" type="text/html" href="' .
5595                       $alt_url . '" />' . "\n" .
5596                       '<link rel="self" type="' . $content_type . '" href="' .
5597                       $cgi->self_url() . '" />' . "\n" .
5598                       "<id>" . href(-full=>1) . "</id>\n" .
5599                       # use project owner for feed author
5600                       "<author><name>$owner</name></author>\n";
5601                 if (defined $favicon) {
5602                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5603                 }
5604                 if (defined $logo_url) {
5605                         # not twice as wide as tall: 72 x 27 pixels
5606                         print "<logo>" . esc_url($logo) . "</logo>\n";
5607                 }
5608                 if (! %latest_date) {
5609                         # dummy date to keep the feed valid until commits trickle in:
5610                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5611                 } else {
5612                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5613                 }
5614         }
5615
5616         # contents
5617         for (my $i = 0; $i <= $#commitlist; $i++) {
5618                 my %co = %{$commitlist[$i]};
5619                 my $commit = $co{'id'};
5620                 # we read 150, we always show 30 and the ones more recent than 48 hours
5621                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5622                         last;
5623                 }
5624                 my %cd = parse_date($co{'author_epoch'});
5625
5626                 # get list of changed files
5627                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5628                         $co{'parent'} || "--root",
5629                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5630                         or next;
5631                 my @difftree = map { chomp; $_ } <$fd>;
5632                 close $fd
5633                         or next;
5634
5635                 # print element (entry, item)
5636                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5637                 if ($format eq 'rss') {
5638                         print "<item>\n" .
5639                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5640                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5641                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5642                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5643                               "<link>$co_url</link>\n" .
5644                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5645                               "<content:encoded>" .
5646                               "<![CDATA[\n";
5647                 } elsif ($format eq 'atom') {
5648                         print "<entry>\n" .
5649                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5650                               "<updated>$cd{'iso-8601'}</updated>\n" .
5651                               "<author>\n" .
5652                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5653                         if ($co{'author_email'}) {
5654                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5655                         }
5656                         print "</author>\n" .
5657                               # use committer for contributor
5658                               "<contributor>\n" .
5659                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5660                         if ($co{'committer_email'}) {
5661                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5662                         }
5663                         print "</contributor>\n" .
5664                               "<published>$cd{'iso-8601'}</published>\n" .
5665                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5666                               "<id>$co_url</id>\n" .
5667                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5668                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5669                 }
5670                 my $comment = $co{'comment'};
5671                 print "<pre>\n";
5672                 foreach my $line (@$comment) {
5673                         $line = esc_html($line);
5674                         print "$line\n";
5675                 }
5676                 print "</pre><ul>\n";
5677                 foreach my $difftree_line (@difftree) {
5678                         my %difftree = parse_difftree_raw_line($difftree_line);
5679                         next if !$difftree{'from_id'};
5680
5681                         my $file = $difftree{'file'} || $difftree{'to_file'};
5682
5683                         print "<li>" .
5684                               "[" .
5685                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5686                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5687                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5688                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5689                                       -title => "diff"}, 'D');
5690                         if ($have_blame) {
5691                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5692                                                              file_name=>$file, hash_base=>$commit),
5693                                               -title => "blame"}, 'B');
5694                         }
5695                         # if this is not a feed of a file history
5696                         if (!defined $file_name || $file_name ne $file) {
5697                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5698                                                              file_name=>$file, hash=>$commit),
5699                                               -title => "history"}, 'H');
5700                         }
5701                         $file = esc_path($file);
5702                         print "] ".
5703                               "$file</li>\n";
5704                 }
5705                 if ($format eq 'rss') {
5706                         print "</ul>]]>\n" .
5707                               "</content:encoded>\n" .
5708                               "</item>\n";
5709                 } elsif ($format eq 'atom') {
5710                         print "</ul>\n</div>\n" .
5711                               "</content>\n" .
5712                               "</entry>\n";
5713                 }
5714         }
5715
5716         # end of feed
5717         if ($format eq 'rss') {
5718                 print "</channel>\n</rss>\n";
5719         }       elsif ($format eq 'atom') {
5720                 print "</feed>\n";
5721         }
5722 }
5723
5724 sub git_rss {
5725         git_feed('rss');
5726 }
5727
5728 sub git_atom {
5729         git_feed('atom');
5730 }
5731
5732 sub git_opml {
5733         my @list = git_get_projects_list();
5734
5735         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5736         print <<XML;
5737 <?xml version="1.0" encoding="utf-8"?>
5738 <opml version="1.0">
5739 <head>
5740   <title>$site_name OPML Export</title>
5741 </head>
5742 <body>
5743 <outline text="git RSS feeds">
5744 XML
5745
5746         foreach my $pr (@list) {
5747                 my %proj = %$pr;
5748                 my $head = git_get_head_hash($proj{'path'});
5749                 if (!defined $head) {
5750                         next;
5751                 }
5752                 $git_dir = "$projectroot/$proj{'path'}";
5753                 my %co = parse_commit($head);
5754                 if (!%co) {
5755                         next;
5756                 }
5757
5758                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5759                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5760                 my $html = "$my_url?p=$proj{'path'};a=summary";
5761                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5762         }
5763         print <<XML;
5764 </outline>
5765 </body>
5766 </opml>
5767 XML
5768 }