gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  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 = "++GITWEB_HOME_LINK_STR++";
  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 $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_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 = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  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 = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_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 = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 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         $path_info =~ s,^$project/*,,;
 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                 $href .= "/$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                         }, "snapshot");
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 # returns path to the core git executable and the --git-dir parameter as string
1460 sub git_cmd_str {
1461         return join(' ', git_cmd());
1462 }
1463
1464 # get HEAD ref of given project as hash
1465 sub git_get_head_hash {
1466         my $project = shift;
1467         my $o_git_dir = $git_dir;
1468         my $retval = undef;
1469         $git_dir = "$projectroot/$project";
1470         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1471                 my $head = <$fd>;
1472                 close $fd;
1473                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1474                         $retval = $1;
1475                 }
1476         }
1477         if (defined $o_git_dir) {
1478                 $git_dir = $o_git_dir;
1479         }
1480         return $retval;
1481 }
1482
1483 # get type of given object
1484 sub git_get_type {
1485         my $hash = shift;
1486
1487         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1488         my $type = <$fd>;
1489         close $fd or return;
1490         chomp $type;
1491         return $type;
1492 }
1493
1494 # repository configuration
1495 our $config_file = '';
1496 our %config;
1497
1498 # store multiple values for single key as anonymous array reference
1499 # single values stored directly in the hash, not as [ <value> ]
1500 sub hash_set_multi {
1501         my ($hash, $key, $value) = @_;
1502
1503         if (!exists $hash->{$key}) {
1504                 $hash->{$key} = $value;
1505         } elsif (!ref $hash->{$key}) {
1506                 $hash->{$key} = [ $hash->{$key}, $value ];
1507         } else {
1508                 push @{$hash->{$key}}, $value;
1509         }
1510 }
1511
1512 # return hash of git project configuration
1513 # optionally limited to some section, e.g. 'gitweb'
1514 sub git_parse_project_config {
1515         my $section_regexp = shift;
1516         my %config;
1517
1518         local $/ = "\0";
1519
1520         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1521                 or return;
1522
1523         while (my $keyval = <$fh>) {
1524                 chomp $keyval;
1525                 my ($key, $value) = split(/\n/, $keyval, 2);
1526
1527                 hash_set_multi(\%config, $key, $value)
1528                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1529         }
1530         close $fh;
1531
1532         return %config;
1533 }
1534
1535 # convert config value to boolean, 'true' or 'false'
1536 # no value, number > 0, 'true' and 'yes' values are true
1537 # rest of values are treated as false (never as error)
1538 sub config_to_bool {
1539         my $val = shift;
1540
1541         # strip leading and trailing whitespace
1542         $val =~ s/^\s+//;
1543         $val =~ s/\s+$//;
1544
1545         return (!defined $val ||               # section.key
1546                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1547                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1548 }
1549
1550 # convert config value to simple decimal number
1551 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1552 # to be multiplied by 1024, 1048576, or 1073741824
1553 sub config_to_int {
1554         my $val = shift;
1555
1556         # strip leading and trailing whitespace
1557         $val =~ s/^\s+//;
1558         $val =~ s/\s+$//;
1559
1560         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1561                 $unit = lc($unit);
1562                 # unknown unit is treated as 1
1563                 return $num * ($unit eq 'g' ? 1073741824 :
1564                                $unit eq 'm' ?    1048576 :
1565                                $unit eq 'k' ?       1024 : 1);
1566         }
1567         return $val;
1568 }
1569
1570 # convert config value to array reference, if needed
1571 sub config_to_multi {
1572         my $val = shift;
1573
1574         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1575 }
1576
1577 sub git_get_project_config {
1578         my ($key, $type) = @_;
1579
1580         # key sanity check
1581         return unless ($key);
1582         $key =~ s/^gitweb\.//;
1583         return if ($key =~ m/\W/);
1584
1585         # type sanity check
1586         if (defined $type) {
1587                 $type =~ s/^--//;
1588                 $type = undef
1589                         unless ($type eq 'bool' || $type eq 'int');
1590         }
1591
1592         # get config
1593         if (!defined $config_file ||
1594             $config_file ne "$git_dir/config") {
1595                 %config = git_parse_project_config('gitweb');
1596                 $config_file = "$git_dir/config";
1597         }
1598
1599         # ensure given type
1600         if (!defined $type) {
1601                 return $config{"gitweb.$key"};
1602         } elsif ($type eq 'bool') {
1603                 # backward compatibility: 'git config --bool' returns true/false
1604                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1605         } elsif ($type eq 'int') {
1606                 return config_to_int($config{"gitweb.$key"});
1607         }
1608         return $config{"gitweb.$key"};
1609 }
1610
1611 # get hash of given path at given ref
1612 sub git_get_hash_by_path {
1613         my $base = shift;
1614         my $path = shift || return undef;
1615         my $type = shift;
1616
1617         $path =~ s,/+$,,;
1618
1619         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1620                 or die_error(undef, "Open git-ls-tree failed");
1621         my $line = <$fd>;
1622         close $fd or return undef;
1623
1624         if (!defined $line) {
1625                 # there is no tree or hash given by $path at $base
1626                 return undef;
1627         }
1628
1629         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1630         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1631         if (defined $type && $type ne $2) {
1632                 # type doesn't match
1633                 return undef;
1634         }
1635         return $3;
1636 }
1637
1638 # get path of entry with given hash at given tree-ish (ref)
1639 # used to get 'from' filename for combined diff (merge commit) for renames
1640 sub git_get_path_by_hash {
1641         my $base = shift || return;
1642         my $hash = shift || return;
1643
1644         local $/ = "\0";
1645
1646         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1647                 or return undef;
1648         while (my $line = <$fd>) {
1649                 chomp $line;
1650
1651                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1652                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1653                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1654                         close $fd;
1655                         return $1;
1656                 }
1657         }
1658         close $fd;
1659         return undef;
1660 }
1661
1662 ## ......................................................................
1663 ## git utility functions, directly accessing git repository
1664
1665 sub git_get_project_description {
1666         my $path = shift;
1667
1668         $git_dir = "$projectroot/$path";
1669         open my $fd, "$git_dir/description"
1670                 or return git_get_project_config('description');
1671         my $descr = <$fd>;
1672         close $fd;
1673         if (defined $descr) {
1674                 chomp $descr;
1675         }
1676         return $descr;
1677 }
1678
1679 sub git_get_project_url_list {
1680         my $path = shift;
1681
1682         $git_dir = "$projectroot/$path";
1683         open my $fd, "$git_dir/cloneurl"
1684                 or return wantarray ?
1685                 @{ config_to_multi(git_get_project_config('url')) } :
1686                    config_to_multi(git_get_project_config('url'));
1687         my @git_project_url_list = map { chomp; $_ } <$fd>;
1688         close $fd;
1689
1690         return wantarray ? @git_project_url_list : \@git_project_url_list;
1691 }
1692
1693 sub git_get_projects_list {
1694         my ($filter) = @_;
1695         my @list;
1696
1697         $filter ||= '';
1698         $filter =~ s/\.git$//;
1699
1700         my ($check_forks) = gitweb_check_feature('forks');
1701
1702         if (-d $projects_list) {
1703                 # search in directory
1704                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1705                 # remove the trailing "/"
1706                 $dir =~ s!/+$!!;
1707                 my $pfxlen = length("$dir");
1708                 my $pfxdepth = ($dir =~ tr!/!!);
1709
1710                 File::Find::find({
1711                         follow_fast => 1, # follow symbolic links
1712                         follow_skip => 2, # ignore duplicates
1713                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1714                         wanted => sub {
1715                                 # skip project-list toplevel, if we get it.
1716                                 return if (m!^[/.]$!);
1717                                 # only directories can be git repositories
1718                                 return unless (-d $_);
1719                                 # don't traverse too deep (Find is super slow on os x)
1720                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1721                                         $File::Find::prune = 1;
1722                                         return;
1723                                 }
1724
1725                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1726                                 # we check related file in $projectroot
1727                                 if ($check_forks and $subdir =~ m#/.#) {
1728                                         $File::Find::prune = 1;
1729                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1730                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1731                                         $File::Find::prune = 1;
1732                                 }
1733                         },
1734                 }, "$dir");
1735
1736         } elsif (-f $projects_list) {
1737                 # read from file(url-encoded):
1738                 # 'git%2Fgit.git Linus+Torvalds'
1739                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1740                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1741                 my %paths;
1742                 open my ($fd), $projects_list or return;
1743         PROJECT:
1744                 while (my $line = <$fd>) {
1745                         chomp $line;
1746                         my ($path, $owner) = split ' ', $line;
1747                         $path = unescape($path);
1748                         $owner = unescape($owner);
1749                         if (!defined $path) {
1750                                 next;
1751                         }
1752                         if ($filter ne '') {
1753                                 # looking for forks;
1754                                 my $pfx = substr($path, 0, length($filter));
1755                                 if ($pfx ne $filter) {
1756                                         next PROJECT;
1757                                 }
1758                                 my $sfx = substr($path, length($filter));
1759                                 if ($sfx !~ /^\/.*\.git$/) {
1760                                         next PROJECT;
1761                                 }
1762                         } elsif ($check_forks) {
1763                         PATH:
1764                                 foreach my $filter (keys %paths) {
1765                                         # looking for forks;
1766                                         my $pfx = substr($path, 0, length($filter));
1767                                         if ($pfx ne $filter) {
1768                                                 next PATH;
1769                                         }
1770                                         my $sfx = substr($path, length($filter));
1771                                         if ($sfx !~ /^\/.*\.git$/) {
1772                                                 next PATH;
1773                                         }
1774                                         # is a fork, don't include it in
1775                                         # the list
1776                                         next PROJECT;
1777                                 }
1778                         }
1779                         if (check_export_ok("$projectroot/$path")) {
1780                                 my $pr = {
1781                                         path => $path,
1782                                         owner => to_utf8($owner),
1783                                 };
1784                                 push @list, $pr;
1785                                 (my $forks_path = $path) =~ s/\.git$//;
1786                                 $paths{$forks_path}++;
1787                         }
1788                 }
1789                 close $fd;
1790         }
1791         return @list;
1792 }
1793
1794 our $gitweb_project_owner = undef;
1795 sub git_get_project_list_from_file {
1796
1797         return if (defined $gitweb_project_owner);
1798
1799         $gitweb_project_owner = {};
1800         # read from file (url-encoded):
1801         # 'git%2Fgit.git Linus+Torvalds'
1802         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1803         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1804         if (-f $projects_list) {
1805                 open (my $fd , $projects_list);
1806                 while (my $line = <$fd>) {
1807                         chomp $line;
1808                         my ($pr, $ow) = split ' ', $line;
1809                         $pr = unescape($pr);
1810                         $ow = unescape($ow);
1811                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1812                 }
1813                 close $fd;
1814         }
1815 }
1816
1817 sub git_get_project_owner {
1818         my $project = shift;
1819         my $owner;
1820
1821         return undef unless $project;
1822         $git_dir = "$projectroot/$project";
1823
1824         if (!defined $gitweb_project_owner) {
1825                 git_get_project_list_from_file();
1826         }
1827
1828         if (exists $gitweb_project_owner->{$project}) {
1829                 $owner = $gitweb_project_owner->{$project};
1830         }
1831         if (!defined $owner){
1832                 $owner = git_get_project_config('owner');
1833         }
1834         if (!defined $owner) {
1835                 $owner = get_file_owner("$git_dir");
1836         }
1837
1838         return $owner;
1839 }
1840
1841 sub git_get_last_activity {
1842         my ($path) = @_;
1843         my $fd;
1844
1845         $git_dir = "$projectroot/$path";
1846         open($fd, "-|", git_cmd(), 'for-each-ref',
1847              '--format=%(committer)',
1848              '--sort=-committerdate',
1849              '--count=1',
1850              'refs/heads') or return;
1851         my $most_recent = <$fd>;
1852         close $fd or return;
1853         if (defined $most_recent &&
1854             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1855                 my $timestamp = $1;
1856                 my $age = time - $timestamp;
1857                 return ($age, age_string($age));
1858         }
1859         return (undef, undef);
1860 }
1861
1862 sub git_get_references {
1863         my $type = shift || "";
1864         my %refs;
1865         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1866         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1867         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1868                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1869                 or return;
1870
1871         while (my $line = <$fd>) {
1872                 chomp $line;
1873                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1874                         if (defined $refs{$1}) {
1875                                 push @{$refs{$1}}, $2;
1876                         } else {
1877                                 $refs{$1} = [ $2 ];
1878                         }
1879                 }
1880         }
1881         close $fd or return;
1882         return \%refs;
1883 }
1884
1885 sub git_get_rev_name_tags {
1886         my $hash = shift || return undef;
1887
1888         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1889                 or return;
1890         my $name_rev = <$fd>;
1891         close $fd;
1892
1893         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1894                 return $1;
1895         } else {
1896                 # catches also '$hash undefined' output
1897                 return undef;
1898         }
1899 }
1900
1901 ## ----------------------------------------------------------------------
1902 ## parse to hash functions
1903
1904 sub parse_date {
1905         my $epoch = shift;
1906         my $tz = shift || "-0000";
1907
1908         my %date;
1909         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1910         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1911         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1912         $date{'hour'} = $hour;
1913         $date{'minute'} = $min;
1914         $date{'mday'} = $mday;
1915         $date{'day'} = $days[$wday];
1916         $date{'month'} = $months[$mon];
1917         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1918                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1919         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1920                              $mday, $months[$mon], $hour ,$min;
1921         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1922                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1923
1924         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1925         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1926         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1927         $date{'hour_local'} = $hour;
1928         $date{'minute_local'} = $min;
1929         $date{'tz_local'} = $tz;
1930         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1931                                   1900+$year, $mon+1, $mday,
1932                                   $hour, $min, $sec, $tz);
1933         return %date;
1934 }
1935
1936 sub parse_tag {
1937         my $tag_id = shift;
1938         my %tag;
1939         my @comment;
1940
1941         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1942         $tag{'id'} = $tag_id;
1943         while (my $line = <$fd>) {
1944                 chomp $line;
1945                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1946                         $tag{'object'} = $1;
1947                 } elsif ($line =~ m/^type (.+)$/) {
1948                         $tag{'type'} = $1;
1949                 } elsif ($line =~ m/^tag (.+)$/) {
1950                         $tag{'name'} = $1;
1951                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1952                         $tag{'author'} = $1;
1953                         $tag{'epoch'} = $2;
1954                         $tag{'tz'} = $3;
1955                 } elsif ($line =~ m/--BEGIN/) {
1956                         push @comment, $line;
1957                         last;
1958                 } elsif ($line eq "") {
1959                         last;
1960                 }
1961         }
1962         push @comment, <$fd>;
1963         $tag{'comment'} = \@comment;
1964         close $fd or return;
1965         if (!defined $tag{'name'}) {
1966                 return
1967         };
1968         return %tag
1969 }
1970
1971 sub parse_commit_text {
1972         my ($commit_text, $withparents) = @_;
1973         my @commit_lines = split '\n', $commit_text;
1974         my %co;
1975
1976         pop @commit_lines; # Remove '\0'
1977
1978         if (! @commit_lines) {
1979                 return;
1980         }
1981
1982         my $header = shift @commit_lines;
1983         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1984                 return;
1985         }
1986         ($co{'id'}, my @parents) = split ' ', $header;
1987         while (my $line = shift @commit_lines) {
1988                 last if $line eq "\n";
1989                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1990                         $co{'tree'} = $1;
1991                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1992                         push @parents, $1;
1993                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1994                         $co{'author'} = $1;
1995                         $co{'author_epoch'} = $2;
1996                         $co{'author_tz'} = $3;
1997                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1998                                 $co{'author_name'}  = $1;
1999                                 $co{'author_email'} = $2;
2000                         } else {
2001                                 $co{'author_name'} = $co{'author'};
2002                         }
2003                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2004                         $co{'committer'} = $1;
2005                         $co{'committer_epoch'} = $2;
2006                         $co{'committer_tz'} = $3;
2007                         $co{'committer_name'} = $co{'committer'};
2008                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2009                                 $co{'committer_name'}  = $1;
2010                                 $co{'committer_email'} = $2;
2011                         } else {
2012                                 $co{'committer_name'} = $co{'committer'};
2013                         }
2014                 }
2015         }
2016         if (!defined $co{'tree'}) {
2017                 return;
2018         };
2019         $co{'parents'} = \@parents;
2020         $co{'parent'} = $parents[0];
2021
2022         foreach my $title (@commit_lines) {
2023                 $title =~ s/^    //;
2024                 if ($title ne "") {
2025                         $co{'title'} = chop_str($title, 80, 5);
2026                         # remove leading stuff of merges to make the interesting part visible
2027                         if (length($title) > 50) {
2028                                 $title =~ s/^Automatic //;
2029                                 $title =~ s/^merge (of|with) /Merge ... /i;
2030                                 if (length($title) > 50) {
2031                                         $title =~ s/(http|rsync):\/\///;
2032                                 }
2033                                 if (length($title) > 50) {
2034                                         $title =~ s/(master|www|rsync)\.//;
2035                                 }
2036                                 if (length($title) > 50) {
2037                                         $title =~ s/kernel.org:?//;
2038                                 }
2039                                 if (length($title) > 50) {
2040                                         $title =~ s/\/pub\/scm//;
2041                                 }
2042                         }
2043                         $co{'title_short'} = chop_str($title, 50, 5);
2044                         last;
2045                 }
2046         }
2047         if ($co{'title'} eq "") {
2048                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2049         }
2050         # remove added spaces
2051         foreach my $line (@commit_lines) {
2052                 $line =~ s/^    //;
2053         }
2054         $co{'comment'} = \@commit_lines;
2055
2056         my $age = time - $co{'committer_epoch'};
2057         $co{'age'} = $age;
2058         $co{'age_string'} = age_string($age);
2059         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2060         if ($age > 60*60*24*7*2) {
2061                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2062                 $co{'age_string_age'} = $co{'age_string'};
2063         } else {
2064                 $co{'age_string_date'} = $co{'age_string'};
2065                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2066         }
2067         return %co;
2068 }
2069
2070 sub parse_commit {
2071         my ($commit_id) = @_;
2072         my %co;
2073
2074         local $/ = "\0";
2075
2076         open my $fd, "-|", git_cmd(), "rev-list",
2077                 "--parents",
2078                 "--header",
2079                 "--max-count=1",
2080                 $commit_id,
2081                 "--",
2082                 or die_error(undef, "Open git-rev-list failed");
2083         %co = parse_commit_text(<$fd>, 1);
2084         close $fd;
2085
2086         return %co;
2087 }
2088
2089 sub parse_commits {
2090         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2091         my @cos;
2092
2093         $maxcount ||= 1;
2094         $skip ||= 0;
2095
2096         local $/ = "\0";
2097
2098         open my $fd, "-|", git_cmd(), "rev-list",
2099                 "--header",
2100                 @args,
2101                 ("--max-count=" . $maxcount),
2102                 ("--skip=" . $skip),
2103                 @extra_options,
2104                 $commit_id,
2105                 "--",
2106                 ($filename ? ($filename) : ())
2107                 or die_error(undef, "Open git-rev-list failed");
2108         while (my $line = <$fd>) {
2109                 my %co = parse_commit_text($line);
2110                 push @cos, \%co;
2111         }
2112         close $fd;
2113
2114         return wantarray ? @cos : \@cos;
2115 }
2116
2117 # parse ref from ref_file, given by ref_id, with given type
2118 sub parse_ref {
2119         my $ref_file = shift;
2120         my $ref_id = shift;
2121         my $type = shift || git_get_type($ref_id);
2122         my %ref_item;
2123
2124         $ref_item{'type'} = $type;
2125         $ref_item{'id'} = $ref_id;
2126         $ref_item{'epoch'} = 0;
2127         $ref_item{'age'} = "unknown";
2128         if ($type eq "tag") {
2129                 my %tag = parse_tag($ref_id);
2130                 $ref_item{'comment'} = $tag{'comment'};
2131                 if ($tag{'type'} eq "commit") {
2132                         my %co = parse_commit($tag{'object'});
2133                         $ref_item{'epoch'} = $co{'committer_epoch'};
2134                         $ref_item{'age'} = $co{'age_string'};
2135                 } elsif (defined($tag{'epoch'})) {
2136                         my $age = time - $tag{'epoch'};
2137                         $ref_item{'epoch'} = $tag{'epoch'};
2138                         $ref_item{'age'} = age_string($age);
2139                 }
2140                 $ref_item{'reftype'} = $tag{'type'};
2141                 $ref_item{'name'} = $tag{'name'};
2142                 $ref_item{'refid'} = $tag{'object'};
2143         } elsif ($type eq "commit"){
2144                 my %co = parse_commit($ref_id);
2145                 $ref_item{'reftype'} = "commit";
2146                 $ref_item{'name'} = $ref_file;
2147                 $ref_item{'title'} = $co{'title'};
2148                 $ref_item{'refid'} = $ref_id;
2149                 $ref_item{'epoch'} = $co{'committer_epoch'};
2150                 $ref_item{'age'} = $co{'age_string'};
2151         } else {
2152                 $ref_item{'reftype'} = $type;
2153                 $ref_item{'name'} = $ref_file;
2154                 $ref_item{'refid'} = $ref_id;
2155         }
2156
2157         return %ref_item;
2158 }
2159
2160 # parse line of git-diff-tree "raw" output
2161 sub parse_difftree_raw_line {
2162         my $line = shift;
2163         my %res;
2164
2165         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2166         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2167         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2168                 $res{'from_mode'} = $1;
2169                 $res{'to_mode'} = $2;
2170                 $res{'from_id'} = $3;
2171                 $res{'to_id'} = $4;
2172                 $res{'status'} = $res{'status_str'} = $5;
2173                 $res{'similarity'} = $6;
2174                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2175                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2176                 } else {
2177                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2178                 }
2179         }
2180         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2181         # combined diff (for merge commit)
2182         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2183                 $res{'nparents'}  = length($1);
2184                 $res{'from_mode'} = [ split(' ', $2) ];
2185                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2186                 $res{'from_id'} = [ split(' ', $3) ];
2187                 $res{'to_id'} = pop @{$res{'from_id'}};
2188                 $res{'status_str'} = $4;
2189                 $res{'status'} = [ split('', $4) ];
2190                 $res{'to_file'} = unquote($5);
2191         }
2192         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2193         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2194                 $res{'commit'} = $1;
2195         }
2196
2197         return wantarray ? %res : \%res;
2198 }
2199
2200 # wrapper: return parsed line of git-diff-tree "raw" output
2201 # (the argument might be raw line, or parsed info)
2202 sub parsed_difftree_line {
2203         my $line_or_ref = shift;
2204
2205         if (ref($line_or_ref) eq "HASH") {
2206                 # pre-parsed (or generated by hand)
2207                 return $line_or_ref;
2208         } else {
2209                 return parse_difftree_raw_line($line_or_ref);
2210         }
2211 }
2212
2213 # parse line of git-ls-tree output
2214 sub parse_ls_tree_line ($;%) {
2215         my $line = shift;
2216         my %opts = @_;
2217         my %res;
2218
2219         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2220         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2221
2222         $res{'mode'} = $1;
2223         $res{'type'} = $2;
2224         $res{'hash'} = $3;
2225         if ($opts{'-z'}) {
2226                 $res{'name'} = $4;
2227         } else {
2228                 $res{'name'} = unquote($4);
2229         }
2230
2231         return wantarray ? %res : \%res;
2232 }
2233
2234 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2235 sub parse_from_to_diffinfo {
2236         my ($diffinfo, $from, $to, @parents) = @_;
2237
2238         if ($diffinfo->{'nparents'}) {
2239                 # combined diff
2240                 $from->{'file'} = [];
2241                 $from->{'href'} = [];
2242                 fill_from_file_info($diffinfo, @parents)
2243                         unless exists $diffinfo->{'from_file'};
2244                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2245                         $from->{'file'}[$i] =
2246                                 defined $diffinfo->{'from_file'}[$i] ?
2247                                         $diffinfo->{'from_file'}[$i] :
2248                                         $diffinfo->{'to_file'};
2249                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2250                                 $from->{'href'}[$i] = href(action=>"blob",
2251                                                            hash_base=>$parents[$i],
2252                                                            hash=>$diffinfo->{'from_id'}[$i],
2253                                                            file_name=>$from->{'file'}[$i]);
2254                         } else {
2255                                 $from->{'href'}[$i] = undef;
2256                         }
2257                 }
2258         } else {
2259                 # ordinary (not combined) diff
2260                 $from->{'file'} = $diffinfo->{'from_file'};
2261                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2262                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2263                                                hash=>$diffinfo->{'from_id'},
2264                                                file_name=>$from->{'file'});
2265                 } else {
2266                         delete $from->{'href'};
2267                 }
2268         }
2269
2270         $to->{'file'} = $diffinfo->{'to_file'};
2271         if (!is_deleted($diffinfo)) { # file exists in result
2272                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2273                                      hash=>$diffinfo->{'to_id'},
2274                                      file_name=>$to->{'file'});
2275         } else {
2276                 delete $to->{'href'};
2277         }
2278 }
2279
2280 ## ......................................................................
2281 ## parse to array of hashes functions
2282
2283 sub git_get_heads_list {
2284         my $limit = shift;
2285         my @headslist;
2286
2287         open my $fd, '-|', git_cmd(), 'for-each-ref',
2288                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2289                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2290                 'refs/heads'
2291                 or return;
2292         while (my $line = <$fd>) {
2293                 my %ref_item;
2294
2295                 chomp $line;
2296                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2297                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2298                 my ($committer, $epoch, $tz) =
2299                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2300                 $ref_item{'fullname'}  = $name;
2301                 $name =~ s!^refs/heads/!!;
2302
2303                 $ref_item{'name'}  = $name;
2304                 $ref_item{'id'}    = $hash;
2305                 $ref_item{'title'} = $title || '(no commit message)';
2306                 $ref_item{'epoch'} = $epoch;
2307                 if ($epoch) {
2308                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2309                 } else {
2310                         $ref_item{'age'} = "unknown";
2311                 }
2312
2313                 push @headslist, \%ref_item;
2314         }
2315         close $fd;
2316
2317         return wantarray ? @headslist : \@headslist;
2318 }
2319
2320 sub git_get_tags_list {
2321         my $limit = shift;
2322         my @tagslist;
2323
2324         open my $fd, '-|', git_cmd(), 'for-each-ref',
2325                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2326                 '--format=%(objectname) %(objecttype) %(refname) '.
2327                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2328                 'refs/tags'
2329                 or return;
2330         while (my $line = <$fd>) {
2331                 my %ref_item;
2332
2333                 chomp $line;
2334                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2335                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2336                 my ($creator, $epoch, $tz) =
2337                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2338                 $ref_item{'fullname'} = $name;
2339                 $name =~ s!^refs/tags/!!;
2340
2341                 $ref_item{'type'} = $type;
2342                 $ref_item{'id'} = $id;
2343                 $ref_item{'name'} = $name;
2344                 if ($type eq "tag") {
2345                         $ref_item{'subject'} = $title;
2346                         $ref_item{'reftype'} = $reftype;
2347                         $ref_item{'refid'}   = $refid;
2348                 } else {
2349                         $ref_item{'reftype'} = $type;
2350                         $ref_item{'refid'}   = $id;
2351                 }
2352
2353                 if ($type eq "tag" || $type eq "commit") {
2354                         $ref_item{'epoch'} = $epoch;
2355                         if ($epoch) {
2356                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2357                         } else {
2358                                 $ref_item{'age'} = "unknown";
2359                         }
2360                 }
2361
2362                 push @tagslist, \%ref_item;
2363         }
2364         close $fd;
2365
2366         return wantarray ? @tagslist : \@tagslist;
2367 }
2368
2369 ## ----------------------------------------------------------------------
2370 ## filesystem-related functions
2371
2372 sub get_file_owner {
2373         my $path = shift;
2374
2375         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2376         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2377         if (!defined $gcos) {
2378                 return undef;
2379         }
2380         my $owner = $gcos;
2381         $owner =~ s/[,;].*$//;
2382         return to_utf8($owner);
2383 }
2384
2385 ## ......................................................................
2386 ## mimetype related functions
2387
2388 sub mimetype_guess_file {
2389         my $filename = shift;
2390         my $mimemap = shift;
2391         -r $mimemap or return undef;
2392
2393         my %mimemap;
2394         open(MIME, $mimemap) or return undef;
2395         while (<MIME>) {
2396                 next if m/^#/; # skip comments
2397                 my ($mime, $exts) = split(/\t+/);
2398                 if (defined $exts) {
2399                         my @exts = split(/\s+/, $exts);
2400                         foreach my $ext (@exts) {
2401                                 $mimemap{$ext} = $mime;
2402                         }
2403                 }
2404         }
2405         close(MIME);
2406
2407         $filename =~ /\.([^.]*)$/;
2408         return $mimemap{$1};
2409 }
2410
2411 sub mimetype_guess {
2412         my $filename = shift;
2413         my $mime;
2414         $filename =~ /\./ or return undef;
2415
2416         if ($mimetypes_file) {
2417                 my $file = $mimetypes_file;
2418                 if ($file !~ m!^/!) { # if it is relative path
2419                         # it is relative to project
2420                         $file = "$projectroot/$project/$file";
2421                 }
2422                 $mime = mimetype_guess_file($filename, $file);
2423         }
2424         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2425         return $mime;
2426 }
2427
2428 sub blob_mimetype {
2429         my $fd = shift;
2430         my $filename = shift;
2431
2432         if ($filename) {
2433                 my $mime = mimetype_guess($filename);
2434                 $mime and return $mime;
2435         }
2436
2437         # just in case
2438         return $default_blob_plain_mimetype unless $fd;
2439
2440         if (-T $fd) {
2441                 return 'text/plain' .
2442                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2443         } elsif (! $filename) {
2444                 return 'application/octet-stream';
2445         } elsif ($filename =~ m/\.png$/i) {
2446                 return 'image/png';
2447         } elsif ($filename =~ m/\.gif$/i) {
2448                 return 'image/gif';
2449         } elsif ($filename =~ m/\.jpe?g$/i) {
2450                 return 'image/jpeg';
2451         } else {
2452                 return 'application/octet-stream';
2453         }
2454 }
2455
2456 ## ======================================================================
2457 ## functions printing HTML: header, footer, error page
2458
2459 sub git_header_html {
2460         my $status = shift || "200 OK";
2461         my $expires = shift;
2462
2463         my $title = "$site_name";
2464         if (defined $project) {
2465                 $title .= " - " . to_utf8($project);
2466                 if (defined $action) {
2467                         $title .= "/$action";
2468                         if (defined $file_name) {
2469                                 $title .= " - " . esc_path($file_name);
2470                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2471                                         $title .= "/";
2472                                 }
2473                         }
2474                 }
2475         }
2476         my $content_type;
2477         # require explicit support from the UA if we are to send the page as
2478         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2479         # we have to do this because MSIE sometimes globs '*/*', pretending to
2480         # support xhtml+xml but choking when it gets what it asked for.
2481         if (defined $cgi->http('HTTP_ACCEPT') &&
2482             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2483             $cgi->Accept('application/xhtml+xml') != 0) {
2484                 $content_type = 'application/xhtml+xml';
2485         } else {
2486                 $content_type = 'text/html';
2487         }
2488         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2489                            -status=> $status, -expires => $expires);
2490         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2491         print <<EOF;
2492 <?xml version="1.0" encoding="utf-8"?>
2493 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2494 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2495 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2496 <!-- git core binaries version $git_version -->
2497 <head>
2498 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2499 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2500 <meta name="robots" content="index, nofollow"/>
2501 <title>$title</title>
2502 EOF
2503 # print out each stylesheet that exist
2504         if (defined $stylesheet) {
2505 #provides backwards capability for those people who define style sheet in a config file
2506                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2507         } else {
2508                 foreach my $stylesheet (@stylesheets) {
2509                         next unless $stylesheet;
2510                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2511                 }
2512         }
2513         if (defined $project) {
2514                 printf('<link rel="alternate" title="%s log RSS feed" '.
2515                        'href="%s" type="application/rss+xml" />'."\n",
2516                        esc_param($project), href(action=>"rss"));
2517                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2518                        'href="%s" type="application/rss+xml" />'."\n",
2519                        esc_param($project), href(action=>"rss",
2520                                                  extra_options=>"--no-merges"));
2521                 printf('<link rel="alternate" title="%s log Atom feed" '.
2522                        'href="%s" type="application/atom+xml" />'."\n",
2523                        esc_param($project), href(action=>"atom"));
2524                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2525                        'href="%s" type="application/atom+xml" />'."\n",
2526                        esc_param($project), href(action=>"atom",
2527                                                  extra_options=>"--no-merges"));
2528         } else {
2529                 printf('<link rel="alternate" title="%s projects list" '.
2530                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2531                        $site_name, href(project=>undef, action=>"project_index"));
2532                 printf('<link rel="alternate" title="%s projects feeds" '.
2533                        'href="%s" type="text/x-opml"/>'."\n",
2534                        $site_name, href(project=>undef, action=>"opml"));
2535         }
2536         if (defined $favicon) {
2537                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2538         }
2539
2540         print "</head>\n" .
2541               "<body>\n";
2542
2543         if (-f $site_header) {
2544                 open (my $fd, $site_header);
2545                 print <$fd>;
2546                 close $fd;
2547         }
2548
2549         print "<div class=\"page_header\">\n" .
2550               $cgi->a({-href => esc_url($logo_url),
2551                        -title => $logo_label},
2552                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2553         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2554         if (defined $project) {
2555                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2556                 if (defined $action) {
2557                         print " / $action";
2558                 }
2559                 print "\n";
2560         }
2561         print "</div>\n";
2562
2563         my ($have_search) = gitweb_check_feature('search');
2564         if ((defined $project) && ($have_search)) {
2565                 if (!defined $searchtext) {
2566                         $searchtext = "";
2567                 }
2568                 my $search_hash;
2569                 if (defined $hash_base) {
2570                         $search_hash = $hash_base;
2571                 } elsif (defined $hash) {
2572                         $search_hash = $hash;
2573                 } else {
2574                         $search_hash = "HEAD";
2575                 }
2576                 my $action = $my_uri;
2577                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2578                 if ($use_pathinfo) {
2579                         $action .= "/$project";
2580                 } else {
2581                         $cgi->param("p", $project);
2582                 }
2583                 $cgi->param("a", "search");
2584                 $cgi->param("h", $search_hash);
2585                 print $cgi->startform(-method => "get", -action => $action) .
2586                       "<div class=\"search\">\n" .
2587                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2588                       $cgi->hidden(-name => "a") . "\n" .
2589                       $cgi->hidden(-name => "h") . "\n" .
2590                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2591                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2592                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2593                       " search:\n",
2594                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2595                       "<span title=\"Extended regular expression\">" .
2596                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2597                                      -checked => $search_use_regexp) .
2598                       "</span>" .
2599                       "</div>" .
2600                       $cgi->end_form() . "\n";
2601         }
2602 }
2603
2604 sub git_footer_html {
2605         print "<div class=\"page_footer\">\n";
2606         if (defined $project) {
2607                 my $descr = git_get_project_description($project);
2608                 if (defined $descr) {
2609                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2610                 }
2611                 print $cgi->a({-href => href(action=>"rss"),
2612                               -class => "rss_logo"}, "RSS") . " ";
2613                 print $cgi->a({-href => href(action=>"atom"),
2614                               -class => "rss_logo"}, "Atom") . "\n";
2615         } else {
2616                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2617                               -class => "rss_logo"}, "OPML") . " ";
2618                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2619                               -class => "rss_logo"}, "TXT") . "\n";
2620         }
2621         print "</div>\n" ;
2622
2623         if (-f $site_footer) {
2624                 open (my $fd, $site_footer);
2625                 print <$fd>;
2626                 close $fd;
2627         }
2628
2629         print "</body>\n" .
2630               "</html>";
2631 }
2632
2633 sub die_error {
2634         my $status = shift || "403 Forbidden";
2635         my $error = shift || "Malformed query, file missing or permission denied";
2636
2637         git_header_html($status);
2638         print <<EOF;
2639 <div class="page_body">
2640 <br /><br />
2641 $status - $error
2642 <br />
2643 </div>
2644 EOF
2645         git_footer_html();
2646         exit;
2647 }
2648
2649 ## ----------------------------------------------------------------------
2650 ## functions printing or outputting HTML: navigation
2651
2652 sub git_print_page_nav {
2653         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2654         $extra = '' if !defined $extra; # pager or formats
2655
2656         my @navs = qw(summary shortlog log commit commitdiff tree);
2657         if ($suppress) {
2658                 @navs = grep { $_ ne $suppress } @navs;
2659         }
2660
2661         my %arg = map { $_ => {action=>$_} } @navs;
2662         if (defined $head) {
2663                 for (qw(commit commitdiff)) {
2664                         $arg{$_}{'hash'} = $head;
2665                 }
2666                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2667                         for (qw(shortlog log)) {
2668                                 $arg{$_}{'hash'} = $head;
2669                         }
2670                 }
2671         }
2672         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2673         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2674
2675         print "<div class=\"page_nav\">\n" .
2676                 (join " | ",
2677                  map { $_ eq $current ?
2678                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2679                  } @navs);
2680         print "<br/>\n$extra<br/>\n" .
2681               "</div>\n";
2682 }
2683
2684 sub format_paging_nav {
2685         my ($action, $hash, $head, $page, $nrevs) = @_;
2686         my $paging_nav;
2687
2688
2689         if ($hash ne $head || $page) {
2690                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2691         } else {
2692                 $paging_nav .= "HEAD";
2693         }
2694
2695         if ($page > 0) {
2696                 $paging_nav .= " &sdot; " .
2697                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2698                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2699         } else {
2700                 $paging_nav .= " &sdot; prev";
2701         }
2702
2703         if ($nrevs >= (100 * ($page+1)-1)) {
2704                 $paging_nav .= " &sdot; " .
2705                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2706                                  -accesskey => "n", -title => "Alt-n"}, "next");
2707         } else {
2708                 $paging_nav .= " &sdot; next";
2709         }
2710
2711         return $paging_nav;
2712 }
2713
2714 ## ......................................................................
2715 ## functions printing or outputting HTML: div
2716
2717 sub git_print_header_div {
2718         my ($action, $title, $hash, $hash_base) = @_;
2719         my %args = ();
2720
2721         $args{'action'} = $action;
2722         $args{'hash'} = $hash if $hash;
2723         $args{'hash_base'} = $hash_base if $hash_base;
2724
2725         print "<div class=\"header\">\n" .
2726               $cgi->a({-href => href(%args), -class => "title"},
2727               $title ? $title : $action) .
2728               "\n</div>\n";
2729 }
2730
2731 #sub git_print_authorship (\%) {
2732 sub git_print_authorship {
2733         my $co = shift;
2734
2735         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2736         print "<div class=\"author_date\">" .
2737               esc_html($co->{'author_name'}) .
2738               " [$ad{'rfc2822'}";
2739         if ($ad{'hour_local'} < 6) {
2740                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2741                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2742         } else {
2743                 printf(" (%02d:%02d %s)",
2744                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2745         }
2746         print "]</div>\n";
2747 }
2748
2749 sub git_print_page_path {
2750         my $name = shift;
2751         my $type = shift;
2752         my $hb = shift;
2753
2754
2755         print "<div class=\"page_path\">";
2756         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2757                       -title => 'tree root'}, to_utf8("[$project]"));
2758         print " / ";
2759         if (defined $name) {
2760                 my @dirname = split '/', $name;
2761                 my $basename = pop @dirname;
2762                 my $fullname = '';
2763
2764                 foreach my $dir (@dirname) {
2765                         $fullname .= ($fullname ? '/' : '') . $dir;
2766                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2767                                                      hash_base=>$hb),
2768                                       -title => $fullname}, esc_path($dir));
2769                         print " / ";
2770                 }
2771                 if (defined $type && $type eq 'blob') {
2772                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2773                                                      hash_base=>$hb),
2774                                       -title => $name}, esc_path($basename));
2775                 } elsif (defined $type && $type eq 'tree') {
2776                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2777                                                      hash_base=>$hb),
2778                                       -title => $name}, esc_path($basename));
2779                         print " / ";
2780                 } else {
2781                         print esc_path($basename);
2782                 }
2783         }
2784         print "<br/></div>\n";
2785 }
2786
2787 # sub git_print_log (\@;%) {
2788 sub git_print_log ($;%) {
2789         my $log = shift;
2790         my %opts = @_;
2791
2792         if ($opts{'-remove_title'}) {
2793                 # remove title, i.e. first line of log
2794                 shift @$log;
2795         }
2796         # remove leading empty lines
2797         while (defined $log->[0] && $log->[0] eq "") {
2798                 shift @$log;
2799         }
2800
2801         # print log
2802         my $signoff = 0;
2803         my $empty = 0;
2804         foreach my $line (@$log) {
2805                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2806                         $signoff = 1;
2807                         $empty = 0;
2808                         if (! $opts{'-remove_signoff'}) {
2809                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2810                                 next;
2811                         } else {
2812                                 # remove signoff lines
2813                                 next;
2814                         }
2815                 } else {
2816                         $signoff = 0;
2817                 }
2818
2819                 # print only one empty line
2820                 # do not print empty line after signoff
2821                 if ($line eq "") {
2822                         next if ($empty || $signoff);
2823                         $empty = 1;
2824                 } else {
2825                         $empty = 0;
2826                 }
2827
2828                 print format_log_line_html($line) . "<br/>\n";
2829         }
2830
2831         if ($opts{'-final_empty_line'}) {
2832                 # end with single empty line
2833                 print "<br/>\n" unless $empty;
2834         }
2835 }
2836
2837 # return link target (what link points to)
2838 sub git_get_link_target {
2839         my $hash = shift;
2840         my $link_target;
2841
2842         # read link
2843         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2844                 or return;
2845         {
2846                 local $/;
2847                 $link_target = <$fd>;
2848         }
2849         close $fd
2850                 or return;
2851
2852         return $link_target;
2853 }
2854
2855 # given link target, and the directory (basedir) the link is in,
2856 # return target of link relative to top directory (top tree);
2857 # return undef if it is not possible (including absolute links).
2858 sub normalize_link_target {
2859         my ($link_target, $basedir, $hash_base) = @_;
2860
2861         # we can normalize symlink target only if $hash_base is provided
2862         return unless $hash_base;
2863
2864         # absolute symlinks (beginning with '/') cannot be normalized
2865         return if (substr($link_target, 0, 1) eq '/');
2866
2867         # normalize link target to path from top (root) tree (dir)
2868         my $path;
2869         if ($basedir) {
2870                 $path = $basedir . '/' . $link_target;
2871         } else {
2872                 # we are in top (root) tree (dir)
2873                 $path = $link_target;
2874         }
2875
2876         # remove //, /./, and /../
2877         my @path_parts;
2878         foreach my $part (split('/', $path)) {
2879                 # discard '.' and ''
2880                 next if (!$part || $part eq '.');
2881                 # handle '..'
2882                 if ($part eq '..') {
2883                         if (@path_parts) {
2884                                 pop @path_parts;
2885                         } else {
2886                                 # link leads outside repository (outside top dir)
2887                                 return;
2888                         }
2889                 } else {
2890                         push @path_parts, $part;
2891                 }
2892         }
2893         $path = join('/', @path_parts);
2894
2895         return $path;
2896 }
2897
2898 # print tree entry (row of git_tree), but without encompassing <tr> element
2899 sub git_print_tree_entry {
2900         my ($t, $basedir, $hash_base, $have_blame) = @_;
2901
2902         my %base_key = ();
2903         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2904
2905         # The format of a table row is: mode list link.  Where mode is
2906         # the mode of the entry, list is the name of the entry, an href,
2907         # and link is the action links of the entry.
2908
2909         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2910         if ($t->{'type'} eq "blob") {
2911                 print "<td class=\"list\">" .
2912                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2913                                                file_name=>"$basedir$t->{'name'}", %base_key),
2914                                 -class => "list"}, esc_path($t->{'name'}));
2915                 if (S_ISLNK(oct $t->{'mode'})) {
2916                         my $link_target = git_get_link_target($t->{'hash'});
2917                         if ($link_target) {
2918                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2919                                 if (defined $norm_target) {
2920                                         print " -> " .
2921                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2922                                                                      file_name=>$norm_target),
2923                                                        -title => $norm_target}, esc_path($link_target));
2924                                 } else {
2925                                         print " -> " . esc_path($link_target);
2926                                 }
2927                         }
2928                 }
2929                 print "</td>\n";
2930                 print "<td class=\"link\">";
2931                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2932                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2933                               "blob");
2934                 if ($have_blame) {
2935                         print " | " .
2936                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2937                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2938                                       "blame");
2939                 }
2940                 if (defined $hash_base) {
2941                         print " | " .
2942                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2943                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2944                                       "history");
2945                 }
2946                 print " | " .
2947                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2948                                                file_name=>"$basedir$t->{'name'}")},
2949                                 "raw");
2950                 print "</td>\n";
2951
2952         } elsif ($t->{'type'} eq "tree") {
2953                 print "<td class=\"list\">";
2954                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2955                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2956                               esc_path($t->{'name'}));
2957                 print "</td>\n";
2958                 print "<td class=\"link\">";
2959                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2960                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2961                               "tree");
2962                 if (defined $hash_base) {
2963                         print " | " .
2964                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2965                                                      file_name=>"$basedir$t->{'name'}")},
2966                                       "history");
2967                 }
2968                 print "</td>\n";
2969         } else {
2970                 # unknown object: we can only present history for it
2971                 # (this includes 'commit' object, i.e. submodule support)
2972                 print "<td class=\"list\">" .
2973                       esc_path($t->{'name'}) .
2974                       "</td>\n";
2975                 print "<td class=\"link\">";
2976                 if (defined $hash_base) {
2977                         print $cgi->a({-href => href(action=>"history",
2978                                                      hash_base=>$hash_base,
2979                                                      file_name=>"$basedir$t->{'name'}")},
2980                                       "history");
2981                 }
2982                 print "</td>\n";
2983         }
2984 }
2985
2986 ## ......................................................................
2987 ## functions printing large fragments of HTML
2988
2989 # get pre-image filenames for merge (combined) diff
2990 sub fill_from_file_info {
2991         my ($diff, @parents) = @_;
2992
2993         $diff->{'from_file'} = [ ];
2994         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2995         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2996                 if ($diff->{'status'}[$i] eq 'R' ||
2997                     $diff->{'status'}[$i] eq 'C') {
2998                         $diff->{'from_file'}[$i] =
2999                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3000                 }
3001         }
3002
3003         return $diff;
3004 }
3005
3006 # is current raw difftree line of file deletion
3007 sub is_deleted {
3008         my $diffinfo = shift;
3009
3010         return $diffinfo->{'status_str'} =~ /D/;
3011 }
3012
3013 # does patch correspond to [previous] difftree raw line
3014 # $diffinfo  - hashref of parsed raw diff format
3015 # $patchinfo - hashref of parsed patch diff format
3016 #              (the same keys as in $diffinfo)
3017 sub is_patch_split {
3018         my ($diffinfo, $patchinfo) = @_;
3019
3020         return defined $diffinfo && defined $patchinfo
3021                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3022 }
3023
3024
3025 sub git_difftree_body {
3026         my ($difftree, $hash, @parents) = @_;
3027         my ($parent) = $parents[0];
3028         my ($have_blame) = gitweb_check_feature('blame');
3029         print "<div class=\"list_head\">\n";
3030         if ($#{$difftree} > 10) {
3031                 print(($#{$difftree} + 1) . " files changed:\n");
3032         }
3033         print "</div>\n";
3034
3035         print "<table class=\"" .
3036               (@parents > 1 ? "combined " : "") .
3037               "diff_tree\">\n";
3038
3039         # header only for combined diff in 'commitdiff' view
3040         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3041         if ($has_header) {
3042                 # table header
3043                 print "<thead><tr>\n" .
3044                        "<th></th><th></th>\n"; # filename, patchN link
3045                 for (my $i = 0; $i < @parents; $i++) {
3046                         my $par = $parents[$i];
3047                         print "<th>" .
3048                               $cgi->a({-href => href(action=>"commitdiff",
3049                                                      hash=>$hash, hash_parent=>$par),
3050                                        -title => 'commitdiff to parent number ' .
3051                                                   ($i+1) . ': ' . substr($par,0,7)},
3052                                       $i+1) .
3053                               "&nbsp;</th>\n";
3054                 }
3055                 print "</tr></thead>\n<tbody>\n";
3056         }
3057
3058         my $alternate = 1;
3059         my $patchno = 0;
3060         foreach my $line (@{$difftree}) {
3061                 my $diff = parsed_difftree_line($line);
3062
3063                 if ($alternate) {
3064                         print "<tr class=\"dark\">\n";
3065                 } else {
3066                         print "<tr class=\"light\">\n";
3067                 }
3068                 $alternate ^= 1;
3069
3070                 if (exists $diff->{'nparents'}) { # combined diff
3071
3072                         fill_from_file_info($diff, @parents)
3073                                 unless exists $diff->{'from_file'};
3074
3075                         if (!is_deleted($diff)) {
3076                                 # file exists in the result (child) commit
3077                                 print "<td>" .
3078                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3079                                                              file_name=>$diff->{'to_file'},
3080                                                              hash_base=>$hash),
3081                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3082                                       "</td>\n";
3083                         } else {
3084                                 print "<td>" .
3085                                       esc_path($diff->{'to_file'}) .
3086                                       "</td>\n";
3087                         }
3088
3089                         if ($action eq 'commitdiff') {
3090                                 # link to patch
3091                                 $patchno++;
3092                                 print "<td class=\"link\">" .
3093                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3094                                       " | " .
3095                                       "</td>\n";
3096                         }
3097
3098                         my $has_history = 0;
3099                         my $not_deleted = 0;
3100                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3101                                 my $hash_parent = $parents[$i];
3102                                 my $from_hash = $diff->{'from_id'}[$i];
3103                                 my $from_path = $diff->{'from_file'}[$i];
3104                                 my $status = $diff->{'status'}[$i];
3105
3106                                 $has_history ||= ($status ne 'A');
3107                                 $not_deleted ||= ($status ne 'D');
3108
3109                                 if ($status eq 'A') {
3110                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3111                                 } elsif ($status eq 'D') {
3112                                         print "<td class=\"link\">" .
3113                                               $cgi->a({-href => href(action=>"blob",
3114                                                                      hash_base=>$hash,
3115                                                                      hash=>$from_hash,
3116                                                                      file_name=>$from_path)},
3117                                                       "blob" . ($i+1)) .
3118                                               " | </td>\n";
3119                                 } else {
3120                                         if ($diff->{'to_id'} eq $from_hash) {
3121                                                 print "<td class=\"link nochange\">";
3122                                         } else {
3123                                                 print "<td class=\"link\">";
3124                                         }
3125                                         print $cgi->a({-href => href(action=>"blobdiff",
3126                                                                      hash=>$diff->{'to_id'},
3127                                                                      hash_parent=>$from_hash,
3128                                                                      hash_base=>$hash,
3129                                                                      hash_parent_base=>$hash_parent,
3130                                                                      file_name=>$diff->{'to_file'},
3131                                                                      file_parent=>$from_path)},
3132                                                       "diff" . ($i+1)) .
3133                                               " | </td>\n";
3134                                 }
3135                         }
3136
3137                         print "<td class=\"link\">";
3138                         if ($not_deleted) {
3139                                 print $cgi->a({-href => href(action=>"blob",
3140                                                              hash=>$diff->{'to_id'},
3141                                                              file_name=>$diff->{'to_file'},
3142                                                              hash_base=>$hash)},
3143                                               "blob");
3144                                 print " | " if ($has_history);
3145                         }
3146                         if ($has_history) {
3147                                 print $cgi->a({-href => href(action=>"history",
3148                                                              file_name=>$diff->{'to_file'},
3149                                                              hash_base=>$hash)},
3150                                               "history");
3151                         }
3152                         print "</td>\n";
3153
3154                         print "</tr>\n";
3155                         next; # instead of 'else' clause, to avoid extra indent
3156                 }
3157                 # else ordinary diff
3158
3159                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3160                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3161                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3162                         $to_mode_oct = oct $diff->{'to_mode'};
3163                         if (S_ISREG($to_mode_oct)) { # only for regular file
3164                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3165                         }
3166                         $to_file_type = file_type($diff->{'to_mode'});
3167                 }
3168                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3169                         $from_mode_oct = oct $diff->{'from_mode'};
3170                         if (S_ISREG($to_mode_oct)) { # only for regular file
3171                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3172                         }
3173                         $from_file_type = file_type($diff->{'from_mode'});
3174                 }
3175
3176                 if ($diff->{'status'} eq "A") { # created
3177                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3178                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3179                         $mode_chng   .= "]</span>";
3180                         print "<td>";
3181                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3182                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3183                                       -class => "list"}, esc_path($diff->{'file'}));
3184                         print "</td>\n";
3185                         print "<td>$mode_chng</td>\n";
3186                         print "<td class=\"link\">";
3187                         if ($action eq 'commitdiff') {
3188                                 # link to patch
3189                                 $patchno++;
3190                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3191                                 print " | ";
3192                         }
3193                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3194                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3195                                       "blob");
3196                         print "</td>\n";
3197
3198                 } elsif ($diff->{'status'} eq "D") { # deleted
3199                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3200                         print "<td>";
3201                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3202                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3203                                        -class => "list"}, esc_path($diff->{'file'}));
3204                         print "</td>\n";
3205                         print "<td>$mode_chng</td>\n";
3206                         print "<td class=\"link\">";
3207                         if ($action eq 'commitdiff') {
3208                                 # link to patch
3209                                 $patchno++;
3210                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3211                                 print " | ";
3212                         }
3213                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3214                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3215                                       "blob") . " | ";
3216                         if ($have_blame) {
3217                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3218                                                              file_name=>$diff->{'file'})},
3219                                               "blame") . " | ";
3220                         }
3221                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3222                                                      file_name=>$diff->{'file'})},
3223                                       "history");
3224                         print "</td>\n";
3225
3226                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3227                         my $mode_chnge = "";
3228                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3229                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3230                                 if ($from_file_type ne $to_file_type) {
3231                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3232                                 }
3233                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3234                                         if ($from_mode_str && $to_mode_str) {
3235                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3236                                         } elsif ($to_mode_str) {
3237                                                 $mode_chnge .= " mode: $to_mode_str";
3238                                         }
3239                                 }
3240                                 $mode_chnge .= "]</span>\n";
3241                         }
3242                         print "<td>";
3243                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3244                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3245                                       -class => "list"}, esc_path($diff->{'file'}));
3246                         print "</td>\n";
3247                         print "<td>$mode_chnge</td>\n";
3248                         print "<td class=\"link\">";
3249                         if ($action eq 'commitdiff') {
3250                                 # link to patch
3251                                 $patchno++;
3252                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3253                                       " | ";
3254                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3255                                 # "commit" view and modified file (not onlu mode changed)
3256                                 print $cgi->a({-href => href(action=>"blobdiff",
3257                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3258                                                              hash_base=>$hash, hash_parent_base=>$parent,
3259                                                              file_name=>$diff->{'file'})},
3260                                               "diff") .
3261                                       " | ";
3262                         }
3263                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3264                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3265                                        "blob") . " | ";
3266                         if ($have_blame) {
3267                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3268                                                              file_name=>$diff->{'file'})},
3269                                               "blame") . " | ";
3270                         }
3271                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3272                                                      file_name=>$diff->{'file'})},
3273                                       "history");
3274                         print "</td>\n";
3275
3276                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3277                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3278                         my $nstatus = $status_name{$diff->{'status'}};
3279                         my $mode_chng = "";
3280                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3281                                 # mode also for directories, so we cannot use $to_mode_str
3282                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3283                         }
3284                         print "<td>" .
3285                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3286                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3287                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3288                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3289                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3290                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3291                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3292                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3293                               "<td class=\"link\">";
3294                         if ($action eq 'commitdiff') {
3295                                 # link to patch
3296                                 $patchno++;
3297                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3298                                       " | ";
3299                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3300                                 # "commit" view and modified file (not only pure rename or copy)
3301                                 print $cgi->a({-href => href(action=>"blobdiff",
3302                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3303                                                              hash_base=>$hash, hash_parent_base=>$parent,
3304                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3305                                               "diff") .
3306                                       " | ";
3307                         }
3308                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3309                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3310                                       "blob") . " | ";
3311                         if ($have_blame) {
3312                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3313                                                              file_name=>$diff->{'to_file'})},
3314                                               "blame") . " | ";
3315                         }
3316                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3317                                                     file_name=>$diff->{'to_file'})},
3318                                       "history");
3319                         print "</td>\n";
3320
3321                 } # we should not encounter Unmerged (U) or Unknown (X) status
3322                 print "</tr>\n";
3323         }
3324         print "</tbody>" if $has_header;
3325         print "</table>\n";
3326 }
3327
3328 sub git_patchset_body {
3329         my ($fd, $difftree, $hash, @hash_parents) = @_;
3330         my ($hash_parent) = $hash_parents[0];
3331
3332         my $is_combined = (@hash_parents > 1);
3333         my $patch_idx = 0;
3334         my $patch_number = 0;
3335         my $patch_line;
3336         my $diffinfo;
3337         my $to_name;
3338         my (%from, %to);
3339
3340         print "<div class=\"patchset\">\n";
3341
3342         # skip to first patch
3343         while ($patch_line = <$fd>) {
3344                 chomp $patch_line;
3345
3346                 last if ($patch_line =~ m/^diff /);
3347         }
3348
3349  PATCH:
3350         while ($patch_line) {
3351
3352                 # parse "git diff" header line
3353                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3354                         # $1 is from_name, which we do not use
3355                         $to_name = unquote($2);
3356                         $to_name =~ s!^b/!!;
3357                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3358                         # $1 is 'cc' or 'combined', which we do not use
3359                         $to_name = unquote($2);
3360                 } else {
3361                         $to_name = undef;
3362                 }
3363
3364                 # check if current patch belong to current raw line
3365                 # and parse raw git-diff line if needed
3366                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3367                         # this is continuation of a split patch
3368                         print "<div class=\"patch cont\">\n";
3369                 } else {
3370                         # advance raw git-diff output if needed
3371                         $patch_idx++ if defined $diffinfo;
3372
3373                         # read and prepare patch information
3374                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3375
3376                         # compact combined diff output can have some patches skipped
3377                         # find which patch (using pathname of result) we are at now;
3378                         if ($is_combined) {
3379                                 while ($to_name ne $diffinfo->{'to_file'}) {
3380                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3381                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3382                                               "</div>\n";  # class="patch"
3383
3384                                         $patch_idx++;
3385                                         $patch_number++;
3386
3387                                         last if $patch_idx > $#$difftree;
3388                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3389                                 }
3390                         }
3391
3392                         # modifies %from, %to hashes
3393                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3394
3395                         # this is first patch for raw difftree line with $patch_idx index
3396                         # we index @$difftree array from 0, but number patches from 1
3397                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3398                 }
3399
3400                 # git diff header
3401                 #assert($patch_line =~ m/^diff /) if DEBUG;
3402                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3403                 $patch_number++;
3404                 # print "git diff" header
3405                 print format_git_diff_header_line($patch_line, $diffinfo,
3406                                                   \%from, \%to);
3407
3408                 # print extended diff header
3409                 print "<div class=\"diff extended_header\">\n";
3410         EXTENDED_HEADER:
3411                 while ($patch_line = <$fd>) {
3412                         chomp $patch_line;
3413
3414                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3415
3416                         print format_extended_diff_header_line($patch_line, $diffinfo,
3417                                                                \%from, \%to);
3418                 }
3419                 print "</div>\n"; # class="diff extended_header"
3420
3421                 # from-file/to-file diff header
3422                 if (! $patch_line) {
3423                         print "</div>\n"; # class="patch"
3424                         last PATCH;
3425                 }
3426                 next PATCH if ($patch_line =~ m/^diff /);
3427                 #assert($patch_line =~ m/^---/) if DEBUG;
3428
3429                 my $last_patch_line = $patch_line;
3430                 $patch_line = <$fd>;
3431                 chomp $patch_line;
3432                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3433
3434                 print format_diff_from_to_header($last_patch_line, $patch_line,
3435                                                  $diffinfo, \%from, \%to,
3436                                                  @hash_parents);
3437
3438                 # the patch itself
3439         LINE:
3440                 while ($patch_line = <$fd>) {
3441                         chomp $patch_line;
3442
3443                         next PATCH if ($patch_line =~ m/^diff /);
3444
3445                         print format_diff_line($patch_line, \%from, \%to);
3446                 }
3447
3448         } continue {
3449                 print "</div>\n"; # class="patch"
3450         }
3451
3452         # for compact combined (--cc) format, with chunk and patch simpliciaction
3453         # patchset might be empty, but there might be unprocessed raw lines
3454         for (++$patch_idx if $patch_number > 0;
3455              $patch_idx < @$difftree;
3456              ++$patch_idx) {
3457                 # read and prepare patch information
3458                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3459
3460                 # generate anchor for "patch" links in difftree / whatchanged part
3461                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3462                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3463                       "</div>\n";  # class="patch"
3464
3465                 $patch_number++;
3466         }
3467
3468         if ($patch_number == 0) {
3469                 if (@hash_parents > 1) {
3470                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3471                 } else {
3472                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3473                 }
3474         }
3475
3476         print "</div>\n"; # class="patchset"
3477 }
3478
3479 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3480
3481 sub git_project_list_body {
3482         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3483
3484         my ($check_forks) = gitweb_check_feature('forks');
3485
3486         my @projects;
3487         foreach my $pr (@$projlist) {
3488                 my (@aa) = git_get_last_activity($pr->{'path'});
3489                 unless (@aa) {
3490                         next;
3491                 }
3492                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3493                 if (!defined $pr->{'descr'}) {
3494                         my $descr = git_get_project_description($pr->{'path'}) || "";
3495                         $pr->{'descr_long'} = to_utf8($descr);
3496                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3497                 }
3498                 if (!defined $pr->{'owner'}) {
3499                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3500                 }
3501                 if ($check_forks) {
3502                         my $pname = $pr->{'path'};
3503                         if (($pname =~ s/\.git$//) &&
3504                             ($pname !~ /\/$/) &&
3505                             (-d "$projectroot/$pname")) {
3506                                 $pr->{'forks'} = "-d $projectroot/$pname";
3507                         }
3508                         else {
3509                                 $pr->{'forks'} = 0;
3510                         }
3511                 }
3512                 push @projects, $pr;
3513         }
3514
3515         $order ||= $default_projects_order;
3516         $from = 0 unless defined $from;
3517         $to = $#projects if (!defined $to || $#projects < $to);
3518
3519         print "<table class=\"project_list\">\n";
3520         unless ($no_header) {
3521                 print "<tr>\n";
3522                 if ($check_forks) {
3523                         print "<th></th>\n";
3524                 }
3525                 if ($order eq "project") {
3526                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3527                         print "<th>Project</th>\n";
3528                 } else {
3529                         print "<th>" .
3530                               $cgi->a({-href => href(project=>undef, order=>'project'),
3531                                        -class => "header"}, "Project") .
3532                               "</th>\n";
3533                 }
3534                 if ($order eq "descr") {
3535                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3536                         print "<th>Description</th>\n";
3537                 } else {
3538                         print "<th>" .
3539                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3540                                        -class => "header"}, "Description") .
3541                               "</th>\n";
3542                 }
3543                 if ($order eq "owner") {
3544                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3545                         print "<th>Owner</th>\n";
3546                 } else {
3547                         print "<th>" .
3548                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3549                                        -class => "header"}, "Owner") .
3550                               "</th>\n";
3551                 }
3552                 if ($order eq "age") {
3553                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3554                         print "<th>Last Change</th>\n";
3555                 } else {
3556                         print "<th>" .
3557                               $cgi->a({-href => href(project=>undef, order=>'age'),
3558                                        -class => "header"}, "Last Change") .
3559                               "</th>\n";
3560                 }
3561                 print "<th></th>\n" .
3562                       "</tr>\n";
3563         }
3564         my $alternate = 1;
3565         for (my $i = $from; $i <= $to; $i++) {
3566                 my $pr = $projects[$i];
3567                 if ($alternate) {
3568                         print "<tr class=\"dark\">\n";
3569                 } else {
3570                         print "<tr class=\"light\">\n";
3571                 }
3572                 $alternate ^= 1;
3573                 if ($check_forks) {
3574                         print "<td>";
3575                         if ($pr->{'forks'}) {
3576                                 print "<!-- $pr->{'forks'} -->\n";
3577                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3578                         }
3579                         print "</td>\n";
3580                 }
3581                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3582                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3583                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3584                                         -class => "list", -title => $pr->{'descr_long'}},
3585                                         esc_html($pr->{'descr'})) . "</td>\n" .
3586                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3587                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3588                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3589                       "<td class=\"link\">" .
3590                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3591                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3592                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3593                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3594                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3595                       "</td>\n" .
3596                       "</tr>\n";
3597         }
3598         if (defined $extra) {
3599                 print "<tr>\n";
3600                 if ($check_forks) {
3601                         print "<td></td>\n";
3602                 }
3603                 print "<td colspan=\"5\">$extra</td>\n" .
3604                       "</tr>\n";
3605         }
3606         print "</table>\n";
3607 }
3608
3609 sub git_shortlog_body {
3610         # uses global variable $project
3611         my ($commitlist, $from, $to, $refs, $extra) = @_;
3612
3613         $from = 0 unless defined $from;
3614         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3615
3616         print "<table class=\"shortlog\">\n";
3617         my $alternate = 1;
3618         for (my $i = $from; $i <= $to; $i++) {
3619                 my %co = %{$commitlist->[$i]};
3620                 my $commit = $co{'id'};
3621                 my $ref = format_ref_marker($refs, $commit);
3622                 if ($alternate) {
3623                         print "<tr class=\"dark\">\n";
3624                 } else {
3625                         print "<tr class=\"light\">\n";
3626                 }
3627                 $alternate ^= 1;
3628                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3629                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3630                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3631                       "<td><i>" . $author . "</i></td>\n" .
3632                       "<td>";
3633                 print format_subject_html($co{'title'}, $co{'title_short'},
3634                                           href(action=>"commit", hash=>$commit), $ref);
3635                 print "</td>\n" .
3636                       "<td class=\"link\">" .
3637                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3638                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3639                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3640                 my $snapshot_links = format_snapshot_links($commit);
3641                 if (defined $snapshot_links) {
3642                         print " | " . $snapshot_links;
3643                 }
3644                 print "</td>\n" .
3645                       "</tr>\n";
3646         }
3647         if (defined $extra) {
3648                 print "<tr>\n" .
3649                       "<td colspan=\"4\">$extra</td>\n" .
3650                       "</tr>\n";
3651         }
3652         print "</table>\n";
3653 }
3654
3655 sub git_history_body {
3656         # Warning: assumes constant type (blob or tree) during history
3657         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3658
3659         $from = 0 unless defined $from;
3660         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3661
3662         print "<table class=\"history\">\n";
3663         my $alternate = 1;
3664         for (my $i = $from; $i <= $to; $i++) {
3665                 my %co = %{$commitlist->[$i]};
3666                 if (!%co) {
3667                         next;
3668                 }
3669                 my $commit = $co{'id'};
3670
3671                 my $ref = format_ref_marker($refs, $commit);
3672
3673                 if ($alternate) {
3674                         print "<tr class=\"dark\">\n";
3675                 } else {
3676                         print "<tr class=\"light\">\n";
3677                 }
3678                 $alternate ^= 1;
3679         # shortlog uses      chop_str($co{'author_name'}, 10)
3680                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3681                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3682                       "<td><i>" . $author . "</i></td>\n" .
3683                       "<td>";
3684                 # originally git_history used chop_str($co{'title'}, 50)
3685                 print format_subject_html($co{'title'}, $co{'title_short'},
3686                                           href(action=>"commit", hash=>$commit), $ref);
3687                 print "</td>\n" .
3688                       "<td class=\"link\">" .
3689                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3690                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3691
3692                 if ($ftype eq 'blob') {
3693                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3694                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3695                         if (defined $blob_current && defined $blob_parent &&
3696                                         $blob_current ne $blob_parent) {
3697                                 print " | " .
3698                                         $cgi->a({-href => href(action=>"blobdiff",
3699                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3700                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3701                                                                file_name=>$file_name)},
3702                                                 "diff to current");
3703                         }
3704                 }
3705                 print "</td>\n" .
3706                       "</tr>\n";
3707         }
3708         if (defined $extra) {
3709                 print "<tr>\n" .
3710                       "<td colspan=\"4\">$extra</td>\n" .
3711                       "</tr>\n";
3712         }
3713         print "</table>\n";
3714 }
3715
3716 sub git_tags_body {
3717         # uses global variable $project
3718         my ($taglist, $from, $to, $extra) = @_;
3719         $from = 0 unless defined $from;
3720         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3721
3722         print "<table class=\"tags\">\n";
3723         my $alternate = 1;
3724         for (my $i = $from; $i <= $to; $i++) {
3725                 my $entry = $taglist->[$i];
3726                 my %tag = %$entry;
3727                 my $comment = $tag{'subject'};
3728                 my $comment_short;
3729                 if (defined $comment) {
3730                         $comment_short = chop_str($comment, 30, 5);
3731                 }
3732                 if ($alternate) {
3733                         print "<tr class=\"dark\">\n";
3734                 } else {
3735                         print "<tr class=\"light\">\n";
3736                 }
3737                 $alternate ^= 1;
3738                 if (defined $tag{'age'}) {
3739                         print "<td><i>$tag{'age'}</i></td>\n";
3740                 } else {
3741                         print "<td></td>\n";
3742                 }
3743                 print "<td>" .
3744                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3745                                -class => "list name"}, esc_html($tag{'name'})) .
3746                       "</td>\n" .
3747                       "<td>";
3748                 if (defined $comment) {
3749                         print format_subject_html($comment, $comment_short,
3750                                                   href(action=>"tag", hash=>$tag{'id'}));
3751                 }
3752                 print "</td>\n" .
3753                       "<td class=\"selflink\">";
3754                 if ($tag{'type'} eq "tag") {
3755                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3756                 } else {
3757                         print "&nbsp;";
3758                 }
3759                 print "</td>\n" .
3760                       "<td class=\"link\">" . " | " .
3761                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3762                 if ($tag{'reftype'} eq "commit") {
3763                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3764                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3765                 } elsif ($tag{'reftype'} eq "blob") {
3766                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3767                 }
3768                 print "</td>\n" .
3769                       "</tr>";
3770         }
3771         if (defined $extra) {
3772                 print "<tr>\n" .
3773                       "<td colspan=\"5\">$extra</td>\n" .
3774                       "</tr>\n";
3775         }
3776         print "</table>\n";
3777 }
3778
3779 sub git_heads_body {
3780         # uses global variable $project
3781         my ($headlist, $head, $from, $to, $extra) = @_;
3782         $from = 0 unless defined $from;
3783         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3784
3785         print "<table class=\"heads\">\n";
3786         my $alternate = 1;
3787         for (my $i = $from; $i <= $to; $i++) {
3788                 my $entry = $headlist->[$i];
3789                 my %ref = %$entry;
3790                 my $curr = $ref{'id'} eq $head;
3791                 if ($alternate) {
3792                         print "<tr class=\"dark\">\n";
3793                 } else {
3794                         print "<tr class=\"light\">\n";
3795                 }
3796                 $alternate ^= 1;
3797                 print "<td><i>$ref{'age'}</i></td>\n" .
3798                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3799                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3800                                -class => "list name"},esc_html($ref{'name'})) .
3801                       "</td>\n" .
3802                       "<td class=\"link\">" .
3803                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3804                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3805                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3806                       "</td>\n" .
3807                       "</tr>";
3808         }
3809         if (defined $extra) {
3810                 print "<tr>\n" .
3811                       "<td colspan=\"3\">$extra</td>\n" .
3812                       "</tr>\n";
3813         }
3814         print "</table>\n";
3815 }
3816
3817 sub git_search_grep_body {
3818         my ($commitlist, $from, $to, $extra) = @_;
3819         $from = 0 unless defined $from;
3820         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3821
3822         print "<table class=\"commit_search\">\n";
3823         my $alternate = 1;
3824         for (my $i = $from; $i <= $to; $i++) {
3825                 my %co = %{$commitlist->[$i]};
3826                 if (!%co) {
3827                         next;
3828                 }
3829                 my $commit = $co{'id'};
3830                 if ($alternate) {
3831                         print "<tr class=\"dark\">\n";
3832                 } else {
3833                         print "<tr class=\"light\">\n";
3834                 }
3835                 $alternate ^= 1;
3836                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3837                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3838                       "<td><i>" . $author . "</i></td>\n" .
3839                       "<td>" .
3840                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3841                                -class => "list subject"},
3842                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3843                 my $comment = $co{'comment'};
3844                 foreach my $line (@$comment) {
3845                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3846                                 my ($lead, $match, $trail) = ($1, $2, $3);
3847                                 $match = chop_str($match, 70, 5, 'center');
3848                                 my $contextlen = int((80 - length($match))/2);
3849                                 $contextlen = 30 if ($contextlen > 30);
3850                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3851                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3852
3853                                 $lead  = esc_html($lead);
3854                                 $match = esc_html($match);
3855                                 $trail = esc_html($trail);
3856
3857                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3858                         }
3859                 }
3860                 print "</td>\n" .
3861                       "<td class=\"link\">" .
3862                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3863                       " | " .
3864                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3865                       " | " .
3866                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3867                 print "</td>\n" .
3868                       "</tr>\n";
3869         }
3870         if (defined $extra) {
3871                 print "<tr>\n" .
3872                       "<td colspan=\"3\">$extra</td>\n" .
3873                       "</tr>\n";
3874         }
3875         print "</table>\n";
3876 }
3877
3878 ## ======================================================================
3879 ## ======================================================================
3880 ## actions
3881
3882 sub git_project_list {
3883         my $order = $cgi->param('o');
3884         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3885                 die_error(undef, "Unknown order parameter");
3886         }
3887
3888         my @list = git_get_projects_list();
3889         if (!@list) {
3890                 die_error(undef, "No projects found");
3891         }
3892
3893         git_header_html();
3894         if (-f $home_text) {
3895                 print "<div class=\"index_include\">\n";
3896                 open (my $fd, $home_text);
3897                 print <$fd>;
3898                 close $fd;
3899                 print "</div>\n";
3900         }
3901         git_project_list_body(\@list, $order);
3902         git_footer_html();
3903 }
3904
3905 sub git_forks {
3906         my $order = $cgi->param('o');
3907         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3908                 die_error(undef, "Unknown order parameter");
3909         }
3910
3911         my @list = git_get_projects_list($project);
3912         if (!@list) {
3913                 die_error(undef, "No forks found");
3914         }
3915
3916         git_header_html();
3917         git_print_page_nav('','');
3918         git_print_header_div('summary', "$project forks");
3919         git_project_list_body(\@list, $order);
3920         git_footer_html();
3921 }
3922
3923 sub git_project_index {
3924         my @projects = git_get_projects_list($project);
3925
3926         print $cgi->header(
3927                 -type => 'text/plain',
3928                 -charset => 'utf-8',
3929                 -content_disposition => 'inline; filename="index.aux"');
3930
3931         foreach my $pr (@projects) {
3932                 if (!exists $pr->{'owner'}) {
3933                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3934                 }
3935
3936                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3937                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3938                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3939                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3940                 $path  =~ s/ /\+/g;
3941                 $owner =~ s/ /\+/g;
3942
3943                 print "$path $owner\n";
3944         }
3945 }
3946
3947 sub git_summary {
3948         my $descr = git_get_project_description($project) || "none";
3949         my %co = parse_commit("HEAD");
3950         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3951         my $head = $co{'id'};
3952
3953         my $owner = git_get_project_owner($project);
3954
3955         my $refs = git_get_references();
3956         # These get_*_list functions return one more to allow us to see if
3957         # there are more ...
3958         my @taglist  = git_get_tags_list(16);
3959         my @headlist = git_get_heads_list(16);
3960         my @forklist;
3961         my ($check_forks) = gitweb_check_feature('forks');
3962
3963         if ($check_forks) {
3964                 @forklist = git_get_projects_list($project);
3965         }
3966
3967         git_header_html();
3968         git_print_page_nav('summary','', $head);
3969
3970         print "<div class=\"title\">&nbsp;</div>\n";
3971         print "<table class=\"projects_list\">\n" .
3972               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3973               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3974         if (defined $cd{'rfc2822'}) {
3975                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3976         }
3977
3978         # use per project git URL list in $projectroot/$project/cloneurl
3979         # or make project git URL from git base URL and project name
3980         my $url_tag = "URL";
3981         my @url_list = git_get_project_url_list($project);
3982         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3983         foreach my $git_url (@url_list) {
3984                 next unless $git_url;
3985                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3986                 $url_tag = "";
3987         }
3988         print "</table>\n";
3989
3990         if (-s "$projectroot/$project/README.html") {
3991                 if (open my $fd, "$projectroot/$project/README.html") {
3992                         print "<div class=\"title\">readme</div>\n" .
3993                               "<div class=\"readme\">\n";
3994                         print $_ while (<$fd>);
3995                         print "\n</div>\n"; # class="readme"
3996                         close $fd;
3997                 }
3998         }
3999
4000         # we need to request one more than 16 (0..15) to check if
4001         # those 16 are all
4002         my @commitlist = $head ? parse_commits($head, 17) : ();
4003         if (@commitlist) {
4004                 git_print_header_div('shortlog');
4005                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4006                                   $#commitlist <=  15 ? undef :
4007                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4008         }
4009
4010         if (@taglist) {
4011                 git_print_header_div('tags');
4012                 git_tags_body(\@taglist, 0, 15,
4013                               $#taglist <=  15 ? undef :
4014                               $cgi->a({-href => href(action=>"tags")}, "..."));
4015         }
4016
4017         if (@headlist) {
4018                 git_print_header_div('heads');
4019                 git_heads_body(\@headlist, $head, 0, 15,
4020                                $#headlist <= 15 ? undef :
4021                                $cgi->a({-href => href(action=>"heads")}, "..."));
4022         }
4023
4024         if (@forklist) {
4025                 git_print_header_div('forks');
4026                 git_project_list_body(\@forklist, undef, 0, 15,
4027                                       $#forklist <= 15 ? undef :
4028                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4029                                       'noheader');
4030         }
4031
4032         git_footer_html();
4033 }
4034
4035 sub git_tag {
4036         my $head = git_get_head_hash($project);
4037         git_header_html();
4038         git_print_page_nav('','', $head,undef,$head);
4039         my %tag = parse_tag($hash);
4040
4041         if (! %tag) {
4042                 die_error(undef, "Unknown tag object");
4043         }
4044
4045         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4046         print "<div class=\"title_text\">\n" .
4047               "<table class=\"object_header\">\n" .
4048               "<tr>\n" .
4049               "<td>object</td>\n" .
4050               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4051                                $tag{'object'}) . "</td>\n" .
4052               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4053                                               $tag{'type'}) . "</td>\n" .
4054               "</tr>\n";
4055         if (defined($tag{'author'})) {
4056                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4057                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4058                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4059                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4060                         "</td></tr>\n";
4061         }
4062         print "</table>\n\n" .
4063               "</div>\n";
4064         print "<div class=\"page_body\">";
4065         my $comment = $tag{'comment'};
4066         foreach my $line (@$comment) {
4067                 chomp $line;
4068                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4069         }
4070         print "</div>\n";
4071         git_footer_html();
4072 }
4073
4074 sub git_blame2 {
4075         my $fd;
4076         my $ftype;
4077
4078         my ($have_blame) = gitweb_check_feature('blame');
4079         if (!$have_blame) {
4080                 die_error('403 Permission denied', "Permission denied");
4081         }
4082         die_error('404 Not Found', "File name not defined") if (!$file_name);
4083         $hash_base ||= git_get_head_hash($project);
4084         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4085         my %co = parse_commit($hash_base)
4086                 or die_error(undef, "Reading commit failed");
4087         if (!defined $hash) {
4088                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4089                         or die_error(undef, "Error looking up file");
4090         }
4091         $ftype = git_get_type($hash);
4092         if ($ftype !~ "blob") {
4093                 die_error('400 Bad Request', "Object is not a blob");
4094         }
4095         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4096               $file_name, $hash_base)
4097                 or die_error(undef, "Open git-blame failed");
4098         git_header_html();
4099         my $formats_nav =
4100                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4101                         "blob") .
4102                 " | " .
4103                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4104                         "history") .
4105                 " | " .
4106                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4107                         "HEAD");
4108         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4109         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4110         git_print_page_path($file_name, $ftype, $hash_base);
4111         my @rev_color = (qw(light2 dark2));
4112         my $num_colors = scalar(@rev_color);
4113         my $current_color = 0;
4114         my $last_rev;
4115         print <<HTML;
4116 <div class="page_body">
4117 <table class="blame">
4118 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4119 HTML
4120         my %metainfo = ();
4121         while (1) {
4122                 $_ = <$fd>;
4123                 last unless defined $_;
4124                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4125                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4126                 if (!exists $metainfo{$full_rev}) {
4127                         $metainfo{$full_rev} = {};
4128                 }
4129                 my $meta = $metainfo{$full_rev};
4130                 while (<$fd>) {
4131                         last if (s/^\t//);
4132                         if (/^(\S+) (.*)$/) {
4133                                 $meta->{$1} = $2;
4134                         }
4135                 }
4136                 my $data = $_;
4137                 chomp $data;
4138                 my $rev = substr($full_rev, 0, 8);
4139                 my $author = $meta->{'author'};
4140                 my %date = parse_date($meta->{'author-time'},
4141                                       $meta->{'author-tz'});
4142                 my $date = $date{'iso-tz'};
4143                 if ($group_size) {
4144                         $current_color = ++$current_color % $num_colors;
4145                 }
4146                 print "<tr class=\"$rev_color[$current_color]\">\n";
4147                 if ($group_size) {
4148                         print "<td class=\"sha1\"";
4149                         print " title=\"". esc_html($author) . ", $date\"";
4150                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4151                         print ">";
4152                         print $cgi->a({-href => href(action=>"commit",
4153                                                      hash=>$full_rev,
4154                                                      file_name=>$file_name)},
4155                                       esc_html($rev));
4156                         print "</td>\n";
4157                 }
4158                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4159                         or die_error(undef, "Open git-rev-parse failed");
4160                 my $parent_commit = <$dd>;
4161                 close $dd;
4162                 chomp($parent_commit);
4163                 my $blamed = href(action => 'blame',
4164                                   file_name => $meta->{'filename'},
4165                                   hash_base => $parent_commit);
4166                 print "<td class=\"linenr\">";
4167                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4168                                 -id => "l$lineno",
4169                                 -class => "linenr" },
4170                               esc_html($lineno));
4171                 print "</td>";
4172                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4173                 print "</tr>\n";
4174         }
4175         print "</table>\n";
4176         print "</div>";
4177         close $fd
4178                 or print "Reading blob failed\n";
4179         git_footer_html();
4180 }
4181
4182 sub git_blame {
4183         my $fd;
4184
4185         my ($have_blame) = gitweb_check_feature('blame');
4186         if (!$have_blame) {
4187                 die_error('403 Permission denied', "Permission denied");
4188         }
4189         die_error('404 Not Found', "File name not defined") if (!$file_name);
4190         $hash_base ||= git_get_head_hash($project);
4191         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4192         my %co = parse_commit($hash_base)
4193                 or die_error(undef, "Reading commit failed");
4194         if (!defined $hash) {
4195                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4196                         or die_error(undef, "Error lookup file");
4197         }
4198         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4199                 or die_error(undef, "Open git-annotate failed");
4200         git_header_html();
4201         my $formats_nav =
4202                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4203                         "blob") .
4204                 " | " .
4205                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4206                         "history") .
4207                 " | " .
4208                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4209                         "HEAD");
4210         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4211         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4212         git_print_page_path($file_name, 'blob', $hash_base);
4213         print "<div class=\"page_body\">\n";
4214         print <<HTML;
4215 <table class="blame">
4216   <tr>
4217     <th>Commit</th>
4218     <th>Age</th>
4219     <th>Author</th>
4220     <th>Line</th>
4221     <th>Data</th>
4222   </tr>
4223 HTML
4224         my @line_class = (qw(light dark));
4225         my $line_class_len = scalar (@line_class);
4226         my $line_class_num = $#line_class;
4227         while (my $line = <$fd>) {
4228                 my $long_rev;
4229                 my $short_rev;
4230                 my $author;
4231                 my $time;
4232                 my $lineno;
4233                 my $data;
4234                 my $age;
4235                 my $age_str;
4236                 my $age_class;
4237
4238                 chomp $line;
4239                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4240
4241                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4242                         $long_rev = $1;
4243                         $author   = $2;
4244                         $time     = $3;
4245                         $lineno   = $4;
4246                         $data     = $5;
4247                 } else {
4248                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4249                         next;
4250                 }
4251                 $short_rev  = substr ($long_rev, 0, 8);
4252                 $age        = time () - $time;
4253                 $age_str    = age_string ($age);
4254                 $age_str    =~ s/ /&nbsp;/g;
4255                 $age_class  = age_class($age);
4256                 $author     = esc_html ($author);
4257                 $author     =~ s/ /&nbsp;/g;
4258
4259                 $data = untabify($data);
4260                 $data = esc_html ($data);
4261
4262                 print <<HTML;
4263   <tr class="$line_class[$line_class_num]">
4264     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4265     <td class="$age_class">$age_str</td>
4266     <td>$author</td>
4267     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4268     <td class="pre">$data</td>
4269   </tr>
4270 HTML
4271         } # while (my $line = <$fd>)
4272         print "</table>\n\n";
4273         close $fd
4274                 or print "Reading blob failed.\n";
4275         print "</div>";
4276         git_footer_html();
4277 }
4278
4279 sub git_tags {
4280         my $head = git_get_head_hash($project);
4281         git_header_html();
4282         git_print_page_nav('','', $head,undef,$head);
4283         git_print_header_div('summary', $project);
4284
4285         my @tagslist = git_get_tags_list();
4286         if (@tagslist) {
4287                 git_tags_body(\@tagslist);
4288         }
4289         git_footer_html();
4290 }
4291
4292 sub git_heads {
4293         my $head = git_get_head_hash($project);
4294         git_header_html();
4295         git_print_page_nav('','', $head,undef,$head);
4296         git_print_header_div('summary', $project);
4297
4298         my @headslist = git_get_heads_list();
4299         if (@headslist) {
4300                 git_heads_body(\@headslist, $head);
4301         }
4302         git_footer_html();
4303 }
4304
4305 sub git_blob_plain {
4306         my $expires;
4307
4308         if (!defined $hash) {
4309                 if (defined $file_name) {
4310                         my $base = $hash_base || git_get_head_hash($project);
4311                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4312                                 or die_error(undef, "Error lookup file");
4313                 } else {
4314                         die_error(undef, "No file name defined");
4315                 }
4316         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4317                 # blobs defined by non-textual hash id's can be cached
4318                 $expires = "+1d";
4319         }
4320
4321         my $type = shift;
4322         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4323                 or die_error(undef, "Couldn't cat $file_name, $hash");
4324
4325         $type ||= blob_mimetype($fd, $file_name);
4326
4327         # save as filename, even when no $file_name is given
4328         my $save_as = "$hash";
4329         if (defined $file_name) {
4330                 $save_as = $file_name;
4331         } elsif ($type =~ m/^text\//) {
4332                 $save_as .= '.txt';
4333         }
4334
4335         print $cgi->header(
4336                 -type => "$type",
4337                 -expires=>$expires,
4338                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4339         undef $/;
4340         binmode STDOUT, ':raw';
4341         print <$fd>;
4342         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4343         $/ = "\n";
4344         close $fd;
4345 }
4346
4347 sub git_blob {
4348         my $expires;
4349
4350         if (!defined $hash) {
4351                 if (defined $file_name) {
4352                         my $base = $hash_base || git_get_head_hash($project);
4353                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4354                                 or die_error(undef, "Error lookup file");
4355                 } else {
4356                         die_error(undef, "No file name defined");
4357                 }
4358         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4359                 # blobs defined by non-textual hash id's can be cached
4360                 $expires = "+1d";
4361         }
4362
4363         my ($have_blame) = gitweb_check_feature('blame');
4364         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4365                 or die_error(undef, "Couldn't cat $file_name, $hash");
4366         my $mimetype = blob_mimetype($fd, $file_name);
4367         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4368                 close $fd;
4369                 return git_blob_plain($mimetype);
4370         }
4371         # we can have blame only for text/* mimetype
4372         $have_blame &&= ($mimetype =~ m!^text/!);
4373
4374         git_header_html(undef, $expires);
4375         my $formats_nav = '';
4376         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4377                 if (defined $file_name) {
4378                         if ($have_blame) {
4379                                 $formats_nav .=
4380                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4381                                                 "blame") .
4382                                         " | ";
4383                         }
4384                         $formats_nav .=
4385                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4386                                         "history") .
4387                                 " | " .
4388                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4389                                         "raw") .
4390                                 " | " .
4391                                 $cgi->a({-href => href(action=>"blob",
4392                                                        hash_base=>"HEAD", file_name=>$file_name)},
4393                                         "HEAD");
4394                 } else {
4395                         $formats_nav .=
4396                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4397                                         "raw");
4398                 }
4399                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4400                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4401         } else {
4402                 print "<div class=\"page_nav\">\n" .
4403                       "<br/><br/></div>\n" .
4404                       "<div class=\"title\">$hash</div>\n";
4405         }
4406         git_print_page_path($file_name, "blob", $hash_base);
4407         print "<div class=\"page_body\">\n";
4408         if ($mimetype =~ m!^image/!) {
4409                 print qq!<img type="$mimetype"!;
4410                 if ($file_name) {
4411                         print qq! alt="$file_name" title="$file_name"!;
4412                 }
4413                 print qq! src="! .
4414                       href(action=>"blob_plain", hash=>$hash,
4415                            hash_base=>$hash_base, file_name=>$file_name) .
4416                       qq!" />\n!;
4417         } else {
4418                 my $nr;
4419                 while (my $line = <$fd>) {
4420                         chomp $line;
4421                         $nr++;
4422                         $line = untabify($line);
4423                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4424                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4425                 }
4426         }
4427         close $fd
4428                 or print "Reading blob failed.\n";
4429         print "</div>";
4430         git_footer_html();
4431 }
4432
4433 sub git_tree {
4434         if (!defined $hash_base) {
4435                 $hash_base = "HEAD";
4436         }
4437         if (!defined $hash) {
4438                 if (defined $file_name) {
4439                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4440                 } else {
4441                         $hash = $hash_base;
4442                 }
4443         }
4444         $/ = "\0";
4445         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4446                 or die_error(undef, "Open git-ls-tree failed");
4447         my @entries = map { chomp; $_ } <$fd>;
4448         close $fd or die_error(undef, "Reading tree failed");
4449         $/ = "\n";
4450
4451         my $refs = git_get_references();
4452         my $ref = format_ref_marker($refs, $hash_base);
4453         git_header_html();
4454         my $basedir = '';
4455         my ($have_blame) = gitweb_check_feature('blame');
4456         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4457                 my @views_nav = ();
4458                 if (defined $file_name) {
4459                         push @views_nav,
4460                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4461                                         "history"),
4462                                 $cgi->a({-href => href(action=>"tree",
4463                                                        hash_base=>"HEAD", file_name=>$file_name)},
4464                                         "HEAD"),
4465                 }
4466                 my $snapshot_links = format_snapshot_links($hash);
4467                 if (defined $snapshot_links) {
4468                         # FIXME: Should be available when we have no hash base as well.
4469                         push @views_nav, $snapshot_links;
4470                 }
4471                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4472                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4473         } else {
4474                 undef $hash_base;
4475                 print "<div class=\"page_nav\">\n";
4476                 print "<br/><br/></div>\n";
4477                 print "<div class=\"title\">$hash</div>\n";
4478         }
4479         if (defined $file_name) {
4480                 $basedir = $file_name;
4481                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4482                         $basedir .= '/';
4483                 }
4484         }
4485         git_print_page_path($file_name, 'tree', $hash_base);
4486         print "<div class=\"page_body\">\n";
4487         print "<table class=\"tree\">\n";
4488         my $alternate = 1;
4489         # '..' (top directory) link if possible
4490         if (defined $hash_base &&
4491             defined $file_name && $file_name =~ m![^/]+$!) {
4492                 if ($alternate) {
4493                         print "<tr class=\"dark\">\n";
4494                 } else {
4495                         print "<tr class=\"light\">\n";
4496                 }
4497                 $alternate ^= 1;
4498
4499                 my $up = $file_name;
4500                 $up =~ s!/?[^/]+$!!;
4501                 undef $up unless $up;
4502                 # based on git_print_tree_entry
4503                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4504                 print '<td class="list">';
4505                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4506                                              file_name=>$up)},
4507                               "..");
4508                 print "</td>\n";
4509                 print "<td class=\"link\"></td>\n";
4510
4511                 print "</tr>\n";
4512         }
4513         foreach my $line (@entries) {
4514                 my %t = parse_ls_tree_line($line, -z => 1);
4515
4516                 if ($alternate) {
4517                         print "<tr class=\"dark\">\n";
4518                 } else {
4519                         print "<tr class=\"light\">\n";
4520                 }
4521                 $alternate ^= 1;
4522
4523                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4524
4525                 print "</tr>\n";
4526         }
4527         print "</table>\n" .
4528               "</div>";
4529         git_footer_html();
4530 }
4531
4532 sub git_snapshot {
4533         my @supported_fmts = gitweb_check_feature('snapshot');
4534         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4535
4536         my $format = $cgi->param('sf');
4537         if (!@supported_fmts) {
4538                 die_error('403 Permission denied', "Permission denied");
4539         }
4540         # default to first supported snapshot format
4541         $format ||= $supported_fmts[0];
4542         if ($format !~ m/^[a-z0-9]+$/) {
4543                 die_error(undef, "Invalid snapshot format parameter");
4544         } elsif (!exists($known_snapshot_formats{$format})) {
4545                 die_error(undef, "Unknown snapshot format");
4546         } elsif (!grep($_ eq $format, @supported_fmts)) {
4547                 die_error(undef, "Unsupported snapshot format");
4548         }
4549
4550         if (!defined $hash) {
4551                 $hash = git_get_head_hash($project);
4552         }
4553
4554         my $git_command = git_cmd_str();
4555         my $name = $project;
4556         $name =~ s,([^/])/*\.git$,$1,;
4557         $name = basename($name);
4558         my $filename = to_utf8($name);
4559         $name =~ s/\047/\047\\\047\047/g;
4560         my $cmd;
4561         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4562         $cmd = "$git_command archive " .
4563                 "--format=$known_snapshot_formats{$format}{'format'} " .
4564                 "--prefix=\'$name\'/ $hash";
4565         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4566                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4567         }
4568
4569         print $cgi->header(
4570                 -type => $known_snapshot_formats{$format}{'type'},
4571                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4572                 -status => '200 OK');
4573
4574         open my $fd, "-|", $cmd
4575                 or die_error(undef, "Execute git-archive failed");
4576         binmode STDOUT, ':raw';
4577         print <$fd>;
4578         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4579         close $fd;
4580 }
4581
4582 sub git_log {
4583         my $head = git_get_head_hash($project);
4584         if (!defined $hash) {
4585                 $hash = $head;
4586         }
4587         if (!defined $page) {
4588                 $page = 0;
4589         }
4590         my $refs = git_get_references();
4591
4592         my @commitlist = parse_commits($hash, 101, (100 * $page));
4593
4594         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4595
4596         git_header_html();
4597         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4598
4599         if (!@commitlist) {
4600                 my %co = parse_commit($hash);
4601
4602                 git_print_header_div('summary', $project);
4603                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4604         }
4605         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4606         for (my $i = 0; $i <= $to; $i++) {
4607                 my %co = %{$commitlist[$i]};
4608                 next if !%co;
4609                 my $commit = $co{'id'};
4610                 my $ref = format_ref_marker($refs, $commit);
4611                 my %ad = parse_date($co{'author_epoch'});
4612                 git_print_header_div('commit',
4613                                "<span class=\"age\">$co{'age_string'}</span>" .
4614                                esc_html($co{'title'}) . $ref,
4615                                $commit);
4616                 print "<div class=\"title_text\">\n" .
4617                       "<div class=\"log_link\">\n" .
4618                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4619                       " | " .
4620                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4621                       " | " .
4622                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4623                       "<br/>\n" .
4624                       "</div>\n" .
4625                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4626                       "</div>\n";
4627
4628                 print "<div class=\"log_body\">\n";
4629                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4630                 print "</div>\n";
4631         }
4632         if ($#commitlist >= 100) {
4633                 print "<div class=\"page_nav\">\n";
4634                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4635                                -accesskey => "n", -title => "Alt-n"}, "next");
4636                 print "</div>\n";
4637         }
4638         git_footer_html();
4639 }
4640
4641 sub git_commit {
4642         $hash ||= $hash_base || "HEAD";
4643         my %co = parse_commit($hash);
4644         if (!%co) {
4645                 die_error(undef, "Unknown commit object");
4646         }
4647         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4648         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4649
4650         my $parent  = $co{'parent'};
4651         my $parents = $co{'parents'}; # listref
4652
4653         # we need to prepare $formats_nav before any parameter munging
4654         my $formats_nav;
4655         if (!defined $parent) {
4656                 # --root commitdiff
4657                 $formats_nav .= '(initial)';
4658         } elsif (@$parents == 1) {
4659                 # single parent commit
4660                 $formats_nav .=
4661                         '(parent: ' .
4662                         $cgi->a({-href => href(action=>"commit",
4663                                                hash=>$parent)},
4664                                 esc_html(substr($parent, 0, 7))) .
4665                         ')';
4666         } else {
4667                 # merge commit
4668                 $formats_nav .=
4669                         '(merge: ' .
4670                         join(' ', map {
4671                                 $cgi->a({-href => href(action=>"commit",
4672                                                        hash=>$_)},
4673                                         esc_html(substr($_, 0, 7)));
4674                         } @$parents ) .
4675                         ')';
4676         }
4677
4678         if (!defined $parent) {
4679                 $parent = "--root";
4680         }
4681         my @difftree;
4682         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4683                 @diff_opts,
4684                 (@$parents <= 1 ? $parent : '-c'),
4685                 $hash, "--"
4686                 or die_error(undef, "Open git-diff-tree failed");
4687         @difftree = map { chomp; $_ } <$fd>;
4688         close $fd or die_error(undef, "Reading git-diff-tree failed");
4689
4690         # non-textual hash id's can be cached
4691         my $expires;
4692         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4693                 $expires = "+1d";
4694         }
4695         my $refs = git_get_references();
4696         my $ref = format_ref_marker($refs, $co{'id'});
4697
4698         git_header_html(undef, $expires);
4699         git_print_page_nav('commit', '',
4700                            $hash, $co{'tree'}, $hash,
4701                            $formats_nav);
4702
4703         if (defined $co{'parent'}) {
4704                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4705         } else {
4706                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4707         }
4708         print "<div class=\"title_text\">\n" .
4709               "<table class=\"object_header\">\n";
4710         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4711               "<tr>" .
4712               "<td></td><td> $ad{'rfc2822'}";
4713         if ($ad{'hour_local'} < 6) {
4714                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4715                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4716         } else {
4717                 printf(" (%02d:%02d %s)",
4718                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4719         }
4720         print "</td>" .
4721               "</tr>\n";
4722         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4723         print "<tr><td></td><td> $cd{'rfc2822'}" .
4724               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4725               "</td></tr>\n";
4726         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4727         print "<tr>" .
4728               "<td>tree</td>" .
4729               "<td class=\"sha1\">" .
4730               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4731                        class => "list"}, $co{'tree'}) .
4732               "</td>" .
4733               "<td class=\"link\">" .
4734               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4735                       "tree");
4736         my $snapshot_links = format_snapshot_links($hash);
4737         if (defined $snapshot_links) {
4738                 print " | " . $snapshot_links;
4739         }
4740         print "</td>" .
4741               "</tr>\n";
4742
4743         foreach my $par (@$parents) {
4744                 print "<tr>" .
4745                       "<td>parent</td>" .
4746                       "<td class=\"sha1\">" .
4747                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4748                                class => "list"}, $par) .
4749                       "</td>" .
4750                       "<td class=\"link\">" .
4751                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4752                       " | " .
4753                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4754                       "</td>" .
4755                       "</tr>\n";
4756         }
4757         print "</table>".
4758               "</div>\n";
4759
4760         print "<div class=\"page_body\">\n";
4761         git_print_log($co{'comment'});
4762         print "</div>\n";
4763
4764         git_difftree_body(\@difftree, $hash, @$parents);
4765
4766         git_footer_html();
4767 }
4768
4769 sub git_object {
4770         # object is defined by:
4771         # - hash or hash_base alone
4772         # - hash_base and file_name
4773         my $type;
4774
4775         # - hash or hash_base alone
4776         if ($hash || ($hash_base && !defined $file_name)) {
4777                 my $object_id = $hash || $hash_base;
4778
4779                 my $git_command = git_cmd_str();
4780                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4781                         or die_error('404 Not Found', "Object does not exist");
4782                 $type = <$fd>;
4783                 chomp $type;
4784                 close $fd
4785                         or die_error('404 Not Found', "Object does not exist");
4786
4787         # - hash_base and file_name
4788         } elsif ($hash_base && defined $file_name) {
4789                 $file_name =~ s,/+$,,;
4790
4791                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4792                         or die_error('404 Not Found', "Base object does not exist");
4793
4794                 # here errors should not hapen
4795                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4796                         or die_error(undef, "Open git-ls-tree failed");
4797                 my $line = <$fd>;
4798                 close $fd;
4799
4800                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4801                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4802                         die_error('404 Not Found', "File or directory for given base does not exist");
4803                 }
4804                 $type = $2;
4805                 $hash = $3;
4806         } else {
4807                 die_error('404 Not Found', "Not enough information to find object");
4808         }
4809
4810         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4811                                           hash=>$hash, hash_base=>$hash_base,
4812                                           file_name=>$file_name),
4813                              -status => '302 Found');
4814 }
4815
4816 sub git_blobdiff {
4817         my $format = shift || 'html';
4818
4819         my $fd;
4820         my @difftree;
4821         my %diffinfo;
4822         my $expires;
4823
4824         # preparing $fd and %diffinfo for git_patchset_body
4825         # new style URI
4826         if (defined $hash_base && defined $hash_parent_base) {
4827                 if (defined $file_name) {
4828                         # read raw output
4829                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4830                                 $hash_parent_base, $hash_base,
4831                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4832                                 or die_error(undef, "Open git-diff-tree failed");
4833                         @difftree = map { chomp; $_ } <$fd>;
4834                         close $fd
4835                                 or die_error(undef, "Reading git-diff-tree failed");
4836                         @difftree
4837                                 or die_error('404 Not Found', "Blob diff not found");
4838
4839                 } elsif (defined $hash &&
4840                          $hash =~ /[0-9a-fA-F]{40}/) {
4841                         # try to find filename from $hash
4842
4843                         # read filtered raw output
4844                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4845                                 $hash_parent_base, $hash_base, "--"
4846                                 or die_error(undef, "Open git-diff-tree failed");
4847                         @difftree =
4848                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4849                                 # $hash == to_id
4850                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4851                                 map { chomp; $_ } <$fd>;
4852                         close $fd
4853                                 or die_error(undef, "Reading git-diff-tree failed");
4854                         @difftree
4855                                 or die_error('404 Not Found', "Blob diff not found");
4856
4857                 } else {
4858                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4859                 }
4860
4861                 if (@difftree > 1) {
4862                         die_error('404 Not Found', "Ambiguous blob diff specification");
4863                 }
4864
4865                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4866                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4867                 $file_name   ||= $diffinfo{'to_file'};
4868
4869                 $hash_parent ||= $diffinfo{'from_id'};
4870                 $hash        ||= $diffinfo{'to_id'};
4871
4872                 # non-textual hash id's can be cached
4873                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4874                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4875                         $expires = '+1d';
4876                 }
4877
4878                 # open patch output
4879                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4880                         '-p', ($format eq 'html' ? "--full-index" : ()),
4881                         $hash_parent_base, $hash_base,
4882                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4883                         or die_error(undef, "Open git-diff-tree failed");
4884         }
4885
4886         # old/legacy style URI
4887         if (!%diffinfo && # if new style URI failed
4888             defined $hash && defined $hash_parent) {
4889                 # fake git-diff-tree raw output
4890                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4891                 $diffinfo{'from_id'} = $hash_parent;
4892                 $diffinfo{'to_id'}   = $hash;
4893                 if (defined $file_name) {
4894                         if (defined $file_parent) {
4895                                 $diffinfo{'status'} = '2';
4896                                 $diffinfo{'from_file'} = $file_parent;
4897                                 $diffinfo{'to_file'}   = $file_name;
4898                         } else { # assume not renamed
4899                                 $diffinfo{'status'} = '1';
4900                                 $diffinfo{'from_file'} = $file_name;
4901                                 $diffinfo{'to_file'}   = $file_name;
4902                         }
4903                 } else { # no filename given
4904                         $diffinfo{'status'} = '2';
4905                         $diffinfo{'from_file'} = $hash_parent;
4906                         $diffinfo{'to_file'}   = $hash;
4907                 }
4908
4909                 # non-textual hash id's can be cached
4910                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4911                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4912                         $expires = '+1d';
4913                 }
4914
4915                 # open patch output
4916                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4917                         '-p', ($format eq 'html' ? "--full-index" : ()),
4918                         $hash_parent, $hash, "--"
4919                         or die_error(undef, "Open git-diff failed");
4920         } else  {
4921                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4922                         unless %diffinfo;
4923         }
4924
4925         # header
4926         if ($format eq 'html') {
4927                 my $formats_nav =
4928                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4929                                 "raw");
4930                 git_header_html(undef, $expires);
4931                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4932                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4933                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4934                 } else {
4935                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4936                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4937                 }
4938                 if (defined $file_name) {
4939                         git_print_page_path($file_name, "blob", $hash_base);
4940                 } else {
4941                         print "<div class=\"page_path\"></div>\n";
4942                 }
4943
4944         } elsif ($format eq 'plain') {
4945                 print $cgi->header(
4946                         -type => 'text/plain',
4947                         -charset => 'utf-8',
4948                         -expires => $expires,
4949                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4950
4951                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4952
4953         } else {
4954                 die_error(undef, "Unknown blobdiff format");
4955         }
4956
4957         # patch
4958         if ($format eq 'html') {
4959                 print "<div class=\"page_body\">\n";
4960
4961                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4962                 close $fd;
4963
4964                 print "</div>\n"; # class="page_body"
4965                 git_footer_html();
4966
4967         } else {
4968                 while (my $line = <$fd>) {
4969                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4970                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4971
4972                         print $line;
4973
4974                         last if $line =~ m!^\+\+\+!;
4975                 }
4976                 local $/ = undef;
4977                 print <$fd>;
4978                 close $fd;
4979         }
4980 }
4981
4982 sub git_blobdiff_plain {
4983         git_blobdiff('plain');
4984 }
4985
4986 sub git_commitdiff {
4987         my $format = shift || 'html';
4988         $hash ||= $hash_base || "HEAD";
4989         my %co = parse_commit($hash);
4990         if (!%co) {
4991                 die_error(undef, "Unknown commit object");
4992         }
4993
4994         # choose format for commitdiff for merge
4995         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4996                 $hash_parent = '--cc';
4997         }
4998         # we need to prepare $formats_nav before almost any parameter munging
4999         my $formats_nav;
5000         if ($format eq 'html') {
5001                 $formats_nav =
5002                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5003                                 "raw");
5004
5005                 if (defined $hash_parent &&
5006                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5007                         # commitdiff with two commits given
5008                         my $hash_parent_short = $hash_parent;
5009                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5010                                 $hash_parent_short = substr($hash_parent, 0, 7);
5011                         }
5012                         $formats_nav .=
5013                                 ' (from';
5014                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5015                                 if ($co{'parents'}[$i] eq $hash_parent) {
5016                                         $formats_nav .= ' parent ' . ($i+1);
5017                                         last;
5018                                 }
5019                         }
5020                         $formats_nav .= ': ' .
5021                                 $cgi->a({-href => href(action=>"commitdiff",
5022                                                        hash=>$hash_parent)},
5023                                         esc_html($hash_parent_short)) .
5024                                 ')';
5025                 } elsif (!$co{'parent'}) {
5026                         # --root commitdiff
5027                         $formats_nav .= ' (initial)';
5028                 } elsif (scalar @{$co{'parents'}} == 1) {
5029                         # single parent commit
5030                         $formats_nav .=
5031                                 ' (parent: ' .
5032                                 $cgi->a({-href => href(action=>"commitdiff",
5033                                                        hash=>$co{'parent'})},
5034                                         esc_html(substr($co{'parent'}, 0, 7))) .
5035                                 ')';
5036                 } else {
5037                         # merge commit
5038                         if ($hash_parent eq '--cc') {
5039                                 $formats_nav .= ' | ' .
5040                                         $cgi->a({-href => href(action=>"commitdiff",
5041                                                                hash=>$hash, hash_parent=>'-c')},
5042                                                 'combined');
5043                         } else { # $hash_parent eq '-c'
5044                                 $formats_nav .= ' | ' .
5045                                         $cgi->a({-href => href(action=>"commitdiff",
5046                                                                hash=>$hash, hash_parent=>'--cc')},
5047                                                 'compact');
5048                         }
5049                         $formats_nav .=
5050                                 ' (merge: ' .
5051                                 join(' ', map {
5052                                         $cgi->a({-href => href(action=>"commitdiff",
5053                                                                hash=>$_)},
5054                                                 esc_html(substr($_, 0, 7)));
5055                                 } @{$co{'parents'}} ) .
5056                                 ')';
5057                 }
5058         }
5059
5060         my $hash_parent_param = $hash_parent;
5061         if (!defined $hash_parent_param) {
5062                 # --cc for multiple parents, --root for parentless
5063                 $hash_parent_param =
5064                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5065         }
5066
5067         # read commitdiff
5068         my $fd;
5069         my @difftree;
5070         if ($format eq 'html') {
5071                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5072                         "--no-commit-id", "--patch-with-raw", "--full-index",
5073                         $hash_parent_param, $hash, "--"
5074                         or die_error(undef, "Open git-diff-tree failed");
5075
5076                 while (my $line = <$fd>) {
5077                         chomp $line;
5078                         # empty line ends raw part of diff-tree output
5079                         last unless $line;
5080                         push @difftree, scalar parse_difftree_raw_line($line);
5081                 }
5082
5083         } elsif ($format eq 'plain') {
5084                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5085                         '-p', $hash_parent_param, $hash, "--"
5086                         or die_error(undef, "Open git-diff-tree failed");
5087
5088         } else {
5089                 die_error(undef, "Unknown commitdiff format");
5090         }
5091
5092         # non-textual hash id's can be cached
5093         my $expires;
5094         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5095                 $expires = "+1d";
5096         }
5097
5098         # write commit message
5099         if ($format eq 'html') {
5100                 my $refs = git_get_references();
5101                 my $ref = format_ref_marker($refs, $co{'id'});
5102
5103                 git_header_html(undef, $expires);
5104                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5105                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5106                 git_print_authorship(\%co);
5107                 print "<div class=\"page_body\">\n";
5108                 if (@{$co{'comment'}} > 1) {
5109                         print "<div class=\"log\">\n";
5110                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5111                         print "</div>\n"; # class="log"
5112                 }
5113
5114         } elsif ($format eq 'plain') {
5115                 my $refs = git_get_references("tags");
5116                 my $tagname = git_get_rev_name_tags($hash);
5117                 my $filename = basename($project) . "-$hash.patch";
5118
5119                 print $cgi->header(
5120                         -type => 'text/plain',
5121                         -charset => 'utf-8',
5122                         -expires => $expires,
5123                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5124                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5125                 print "From: " . to_utf8($co{'author'}) . "\n";
5126                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5127                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5128
5129                 print "X-Git-Tag: $tagname\n" if $tagname;
5130                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5131
5132                 foreach my $line (@{$co{'comment'}}) {
5133                         print to_utf8($line) . "\n";
5134                 }
5135                 print "---\n\n";
5136         }
5137
5138         # write patch
5139         if ($format eq 'html') {
5140                 my $use_parents = !defined $hash_parent ||
5141                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5142                 git_difftree_body(\@difftree, $hash,
5143                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5144                 print "<br/>\n";
5145
5146                 git_patchset_body($fd, \@difftree, $hash,
5147                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5148                 close $fd;
5149                 print "</div>\n"; # class="page_body"
5150                 git_footer_html();
5151
5152         } elsif ($format eq 'plain') {
5153                 local $/ = undef;
5154                 print <$fd>;
5155                 close $fd
5156                         or print "Reading git-diff-tree failed\n";
5157         }
5158 }
5159
5160 sub git_commitdiff_plain {
5161         git_commitdiff('plain');
5162 }
5163
5164 sub git_history {
5165         if (!defined $hash_base) {
5166                 $hash_base = git_get_head_hash($project);
5167         }
5168         if (!defined $page) {
5169                 $page = 0;
5170         }
5171         my $ftype;
5172         my %co = parse_commit($hash_base);
5173         if (!%co) {
5174                 die_error(undef, "Unknown commit object");
5175         }
5176
5177         my $refs = git_get_references();
5178         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5179
5180         if (!defined $hash && defined $file_name) {
5181                 $hash = git_get_hash_by_path($hash_base, $file_name);
5182         }
5183         if (defined $hash) {
5184                 $ftype = git_get_type($hash);
5185         }
5186
5187         my @commitlist = parse_commits($hash_base, 101, (100 * $page), $file_name, "--full-history");
5188
5189         my $paging_nav = '';
5190         if ($page > 0) {
5191                 $paging_nav .=
5192                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5193                                                file_name=>$file_name)},
5194                                 "first");
5195                 $paging_nav .= " &sdot; " .
5196                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5197                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5198         } else {
5199                 $paging_nav .= "first";
5200                 $paging_nav .= " &sdot; prev";
5201         }
5202         my $next_link = '';
5203         if ($#commitlist >= 100) {
5204                 $next_link =
5205                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5206                                  -accesskey => "n", -title => "Alt-n"}, "next");
5207                 $paging_nav .= " &sdot; $next_link";
5208         } else {
5209                 $paging_nav .= " &sdot; next";
5210         }
5211
5212         git_header_html();
5213         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5214         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5215         git_print_page_path($file_name, $ftype, $hash_base);
5216
5217         git_history_body(\@commitlist, 0, 99,
5218                          $refs, $hash_base, $ftype, $next_link);
5219
5220         git_footer_html();
5221 }
5222
5223 sub git_search {
5224         my ($have_search) = gitweb_check_feature('search');
5225         if (!$have_search) {
5226                 die_error('403 Permission denied', "Permission denied");
5227         }
5228         if (!defined $searchtext) {
5229                 die_error(undef, "Text field empty");
5230         }
5231         if (!defined $hash) {
5232                 $hash = git_get_head_hash($project);
5233         }
5234         my %co = parse_commit($hash);
5235         if (!%co) {
5236                 die_error(undef, "Unknown commit object");
5237         }
5238         if (!defined $page) {
5239                 $page = 0;
5240         }
5241
5242         $searchtype ||= 'commit';
5243         if ($searchtype eq 'pickaxe') {
5244                 # pickaxe may take all resources of your box and run for several minutes
5245                 # with every query - so decide by yourself how public you make this feature
5246                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5247                 if (!$have_pickaxe) {
5248                         die_error('403 Permission denied', "Permission denied");
5249                 }
5250         }
5251         if ($searchtype eq 'grep') {
5252                 my ($have_grep) = gitweb_check_feature('grep');
5253                 if (!$have_grep) {
5254                         die_error('403 Permission denied', "Permission denied");
5255                 }
5256         }
5257
5258         git_header_html();
5259
5260         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5261                 my $greptype;
5262                 if ($searchtype eq 'commit') {
5263                         $greptype = "--grep=";
5264                 } elsif ($searchtype eq 'author') {
5265                         $greptype = "--author=";
5266                 } elsif ($searchtype eq 'committer') {
5267                         $greptype = "--committer=";
5268                 }
5269                 $greptype .= $searchtext;
5270                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5271                                                $greptype, '--regexp-ignore-case',
5272                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5273
5274                 my $paging_nav = '';
5275                 if ($page > 0) {
5276                         $paging_nav .=
5277                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5278                                                        searchtext=>$searchtext,
5279                                                        searchtype=>$searchtype)},
5280                                         "first");
5281                         $paging_nav .= " &sdot; " .
5282                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5283                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5284                 } else {
5285                         $paging_nav .= "first";
5286                         $paging_nav .= " &sdot; prev";
5287                 }
5288                 my $next_link = '';
5289                 if ($#commitlist >= 100) {
5290                         $next_link =
5291                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5292                                          -accesskey => "n", -title => "Alt-n"}, "next");
5293                         $paging_nav .= " &sdot; $next_link";
5294                 } else {
5295                         $paging_nav .= " &sdot; next";
5296                 }
5297
5298                 if ($#commitlist >= 100) {
5299                 }
5300
5301                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5302                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5303                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5304         }
5305
5306         if ($searchtype eq 'pickaxe') {
5307                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5308                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5309
5310                 print "<table class=\"pickaxe search\">\n";
5311                 my $alternate = 1;
5312                 $/ = "\n";
5313                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5314                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5315                         ($search_use_regexp ? '--pickaxe-regex' : ());
5316                 undef %co;
5317                 my @files;
5318                 while (my $line = <$fd>) {
5319                         chomp $line;
5320                         next unless $line;
5321
5322                         my %set = parse_difftree_raw_line($line);
5323                         if (defined $set{'commit'}) {
5324                                 # finish previous commit
5325                                 if (%co) {
5326                                         print "</td>\n" .
5327                                               "<td class=\"link\">" .
5328                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5329                                               " | " .
5330                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5331                                         print "</td>\n" .
5332                                               "</tr>\n";
5333                                 }
5334
5335                                 if ($alternate) {
5336                                         print "<tr class=\"dark\">\n";
5337                                 } else {
5338                                         print "<tr class=\"light\">\n";
5339                                 }
5340                                 $alternate ^= 1;
5341                                 %co = parse_commit($set{'commit'});
5342                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5343                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5344                                       "<td><i>$author</i></td>\n" .
5345                                       "<td>" .
5346                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5347                                               -class => "list subject"},
5348                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5349                         } elsif (defined $set{'to_id'}) {
5350                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5351
5352                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5353                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5354                                               -class => "list"},
5355                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5356                                       "<br/>\n";
5357                         }
5358                 }
5359                 close $fd;
5360
5361                 # finish last commit (warning: repetition!)
5362                 if (%co) {
5363                         print "</td>\n" .
5364                               "<td class=\"link\">" .
5365                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5366                               " | " .
5367                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5368                         print "</td>\n" .
5369                               "</tr>\n";
5370                 }
5371
5372                 print "</table>\n";
5373         }
5374
5375         if ($searchtype eq 'grep') {
5376                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5377                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5378
5379                 print "<table class=\"grep_search\">\n";
5380                 my $alternate = 1;
5381                 my $matches = 0;
5382                 $/ = "\n";
5383                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5384                         $search_use_regexp ? ('-E', '-i') : '-F',
5385                         $searchtext, $co{'tree'};
5386                 my $lastfile = '';
5387                 while (my $line = <$fd>) {
5388                         chomp $line;
5389                         my ($file, $lno, $ltext, $binary);
5390                         last if ($matches++ > 1000);
5391                         if ($line =~ /^Binary file (.+) matches$/) {
5392                                 $file = $1;
5393                                 $binary = 1;
5394                         } else {
5395                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5396                         }
5397                         if ($file ne $lastfile) {
5398                                 $lastfile and print "</td></tr>\n";
5399                                 if ($alternate++) {
5400                                         print "<tr class=\"dark\">\n";
5401                                 } else {
5402                                         print "<tr class=\"light\">\n";
5403                                 }
5404                                 print "<td class=\"list\">".
5405                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5406                                                                file_name=>"$file"),
5407                                                 -class => "list"}, esc_path($file));
5408                                 print "</td><td>\n";
5409                                 $lastfile = $file;
5410                         }
5411                         if ($binary) {
5412                                 print "<div class=\"binary\">Binary file</div>\n";
5413                         } else {
5414                                 $ltext = untabify($ltext);
5415                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5416                                         $ltext = esc_html($1, -nbsp=>1);
5417                                         $ltext .= '<span class="match">';
5418                                         $ltext .= esc_html($2, -nbsp=>1);
5419                                         $ltext .= '</span>';
5420                                         $ltext .= esc_html($3, -nbsp=>1);
5421                                 } else {
5422                                         $ltext = esc_html($ltext, -nbsp=>1);
5423                                 }
5424                                 print "<div class=\"pre\">" .
5425                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5426                                                                file_name=>"$file").'#l'.$lno,
5427                                                 -class => "linenr"}, sprintf('%4i', $lno))
5428                                         . ' ' .  $ltext . "</div>\n";
5429                         }
5430                 }
5431                 if ($lastfile) {
5432                         print "</td></tr>\n";
5433                         if ($matches > 1000) {
5434                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5435                         }
5436                 } else {
5437                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5438                 }
5439                 close $fd;
5440
5441                 print "</table>\n";
5442         }
5443         git_footer_html();
5444 }
5445
5446 sub git_search_help {
5447         git_header_html();
5448         git_print_page_nav('','', $hash,$hash,$hash);
5449         print <<EOT;
5450 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5451 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5452 the pattern entered is recognized as the POSIX extended
5453 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5454 insensitive).</p>
5455 <dl>
5456 <dt><b>commit</b></dt>
5457 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5458 EOT
5459         my ($have_grep) = gitweb_check_feature('grep');
5460         if ($have_grep) {
5461                 print <<EOT;
5462 <dt><b>grep</b></dt>
5463 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5464     a different one) are searched for the given pattern. On large trees, this search can take
5465 a while and put some strain on the server, so please use it with some consideration. Note that
5466 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5467 case-sensitive.</dd>
5468 EOT
5469         }
5470         print <<EOT;
5471 <dt><b>author</b></dt>
5472 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5473 <dt><b>committer</b></dt>
5474 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5475 EOT
5476         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5477         if ($have_pickaxe) {
5478                 print <<EOT;
5479 <dt><b>pickaxe</b></dt>
5480 <dd>All commits that caused the string to appear or disappear from any file (changes that
5481 added, removed or "modified" the string) will be listed. This search can take a while and
5482 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5483 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5484 EOT
5485         }
5486         print "</dl>\n";
5487         git_footer_html();
5488 }
5489
5490 sub git_shortlog {
5491         my $head = git_get_head_hash($project);
5492         if (!defined $hash) {
5493                 $hash = $head;
5494         }
5495         if (!defined $page) {
5496                 $page = 0;
5497         }
5498         my $refs = git_get_references();
5499
5500         my @commitlist = parse_commits($hash, 101, (100 * $page));
5501
5502         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5503         my $next_link = '';
5504         if ($#commitlist >= 100) {
5505                 $next_link =
5506                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5507                                  -accesskey => "n", -title => "Alt-n"}, "next");
5508         }
5509
5510         git_header_html();
5511         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5512         git_print_header_div('summary', $project);
5513
5514         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5515
5516         git_footer_html();
5517 }
5518
5519 ## ......................................................................
5520 ## feeds (RSS, Atom; OPML)
5521
5522 sub git_feed {
5523         my $format = shift || 'atom';
5524         my ($have_blame) = gitweb_check_feature('blame');
5525
5526         # Atom: http://www.atomenabled.org/developers/syndication/
5527         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5528         if ($format ne 'rss' && $format ne 'atom') {
5529                 die_error(undef, "Unknown web feed format");
5530         }
5531
5532         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5533         my $head = $hash || 'HEAD';
5534         my @commitlist = parse_commits($head, 150, 0, $file_name);
5535
5536         my %latest_commit;
5537         my %latest_date;
5538         my $content_type = "application/$format+xml";
5539         if (defined $cgi->http('HTTP_ACCEPT') &&
5540                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5541                 # browser (feed reader) prefers text/xml
5542                 $content_type = 'text/xml';
5543         }
5544         if (defined($commitlist[0])) {
5545                 %latest_commit = %{$commitlist[0]};
5546                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5547                 print $cgi->header(
5548                         -type => $content_type,
5549                         -charset => 'utf-8',
5550                         -last_modified => $latest_date{'rfc2822'});
5551         } else {
5552                 print $cgi->header(
5553                         -type => $content_type,
5554                         -charset => 'utf-8');
5555         }
5556
5557         # Optimization: skip generating the body if client asks only
5558         # for Last-Modified date.
5559         return if ($cgi->request_method() eq 'HEAD');
5560
5561         # header variables
5562         my $title = "$site_name - $project/$action";
5563         my $feed_type = 'log';
5564         if (defined $hash) {
5565                 $title .= " - '$hash'";
5566                 $feed_type = 'branch log';
5567                 if (defined $file_name) {
5568                         $title .= " :: $file_name";
5569                         $feed_type = 'history';
5570                 }
5571         } elsif (defined $file_name) {
5572                 $title .= " - $file_name";
5573                 $feed_type = 'history';
5574         }
5575         $title .= " $feed_type";
5576         my $descr = git_get_project_description($project);
5577         if (defined $descr) {
5578                 $descr = esc_html($descr);
5579         } else {
5580                 $descr = "$project " .
5581                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5582                          " feed";
5583         }
5584         my $owner = git_get_project_owner($project);
5585         $owner = esc_html($owner);
5586
5587         #header
5588         my $alt_url;
5589         if (defined $file_name) {
5590                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5591         } elsif (defined $hash) {
5592                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5593         } else {
5594                 $alt_url = href(-full=>1, action=>"summary");
5595         }
5596         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5597         if ($format eq 'rss') {
5598                 print <<XML;
5599 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5600 <channel>
5601 XML
5602                 print "<title>$title</title>\n" .
5603                       "<link>$alt_url</link>\n" .
5604                       "<description>$descr</description>\n" .
5605                       "<language>en</language>\n";
5606         } elsif ($format eq 'atom') {
5607                 print <<XML;
5608 <feed xmlns="http://www.w3.org/2005/Atom">
5609 XML
5610                 print "<title>$title</title>\n" .
5611                       "<subtitle>$descr</subtitle>\n" .
5612                       '<link rel="alternate" type="text/html" href="' .
5613                       $alt_url . '" />' . "\n" .
5614                       '<link rel="self" type="' . $content_type . '" href="' .
5615                       $cgi->self_url() . '" />' . "\n" .
5616                       "<id>" . href(-full=>1) . "</id>\n" .
5617                       # use project owner for feed author
5618                       "<author><name>$owner</name></author>\n";
5619                 if (defined $favicon) {
5620                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5621                 }
5622                 if (defined $logo_url) {
5623                         # not twice as wide as tall: 72 x 27 pixels
5624                         print "<logo>" . esc_url($logo) . "</logo>\n";
5625                 }
5626                 if (! %latest_date) {
5627                         # dummy date to keep the feed valid until commits trickle in:
5628                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5629                 } else {
5630                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5631                 }
5632         }
5633
5634         # contents
5635         for (my $i = 0; $i <= $#commitlist; $i++) {
5636                 my %co = %{$commitlist[$i]};
5637                 my $commit = $co{'id'};
5638                 # we read 150, we always show 30 and the ones more recent than 48 hours
5639                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5640                         last;
5641                 }
5642                 my %cd = parse_date($co{'author_epoch'});
5643
5644                 # get list of changed files
5645                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5646                         $co{'parent'} || "--root",
5647                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5648                         or next;
5649                 my @difftree = map { chomp; $_ } <$fd>;
5650                 close $fd
5651                         or next;
5652
5653                 # print element (entry, item)
5654                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5655                 if ($format eq 'rss') {
5656                         print "<item>\n" .
5657                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5658                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5659                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5660                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5661                               "<link>$co_url</link>\n" .
5662                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5663                               "<content:encoded>" .
5664                               "<![CDATA[\n";
5665                 } elsif ($format eq 'atom') {
5666                         print "<entry>\n" .
5667                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5668                               "<updated>$cd{'iso-8601'}</updated>\n" .
5669                               "<author>\n" .
5670                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5671                         if ($co{'author_email'}) {
5672                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5673                         }
5674                         print "</author>\n" .
5675                               # use committer for contributor
5676                               "<contributor>\n" .
5677                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5678                         if ($co{'committer_email'}) {
5679                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5680                         }
5681                         print "</contributor>\n" .
5682                               "<published>$cd{'iso-8601'}</published>\n" .
5683                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5684                               "<id>$co_url</id>\n" .
5685                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5686                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5687                 }
5688                 my $comment = $co{'comment'};
5689                 print "<pre>\n";
5690                 foreach my $line (@$comment) {
5691                         $line = esc_html($line);
5692                         print "$line\n";
5693                 }
5694                 print "</pre><ul>\n";
5695                 foreach my $difftree_line (@difftree) {
5696                         my %difftree = parse_difftree_raw_line($difftree_line);
5697                         next if !$difftree{'from_id'};
5698
5699                         my $file = $difftree{'file'} || $difftree{'to_file'};
5700
5701                         print "<li>" .
5702                               "[" .
5703                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5704                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5705                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5706                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5707                                       -title => "diff"}, 'D');
5708                         if ($have_blame) {
5709                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5710                                                              file_name=>$file, hash_base=>$commit),
5711                                               -title => "blame"}, 'B');
5712                         }
5713                         # if this is not a feed of a file history
5714                         if (!defined $file_name || $file_name ne $file) {
5715                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5716                                                              file_name=>$file, hash=>$commit),
5717                                               -title => "history"}, 'H');
5718                         }
5719                         $file = esc_path($file);
5720                         print "] ".
5721                               "$file</li>\n";
5722                 }
5723                 if ($format eq 'rss') {
5724                         print "</ul>]]>\n" .
5725                               "</content:encoded>\n" .
5726                               "</item>\n";
5727                 } elsif ($format eq 'atom') {
5728                         print "</ul>\n</div>\n" .
5729                               "</content>\n" .
5730                               "</entry>\n";
5731                 }
5732         }
5733
5734         # end of feed
5735         if ($format eq 'rss') {
5736                 print "</channel>\n</rss>\n";
5737         }       elsif ($format eq 'atom') {
5738                 print "</feed>\n";
5739         }
5740 }
5741
5742 sub git_rss {
5743         git_feed('rss');
5744 }
5745
5746 sub git_atom {
5747         git_feed('atom');
5748 }
5749
5750 sub git_opml {
5751         my @list = git_get_projects_list();
5752
5753         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5754         print <<XML;
5755 <?xml version="1.0" encoding="utf-8"?>
5756 <opml version="1.0">
5757 <head>
5758   <title>$site_name OPML Export</title>
5759 </head>
5760 <body>
5761 <outline text="git RSS feeds">
5762 XML
5763
5764         foreach my $pr (@list) {
5765                 my %proj = %$pr;
5766                 my $head = git_get_head_hash($proj{'path'});
5767                 if (!defined $head) {
5768                         next;
5769                 }
5770                 $git_dir = "$projectroot/$proj{'path'}";
5771                 my %co = parse_commit($head);
5772                 if (!%co) {
5773                         next;
5774                 }
5775
5776                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5777                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5778                 my $html = "$my_url?p=$proj{'path'};a=summary";
5779                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5780         }
5781         print <<XML;
5782 </outline>
5783 </body>
5784 </opml>
5785 XML
5786 }