git.oblomov.eu Git - git/blob - 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(400, "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(404, "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(400, "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(400, "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(400, "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(400, "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(400, "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(400, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(400, "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(400, "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(400, "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(400, "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(403, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_blame2,
 543         "blobdiff" => \&git_blobdiff,
 544         "blobdiff_plain" => \&git_blobdiff_plain,
 545         "blob" => \&git_blob,
 546         "blob_plain" => \&git_blob_plain,
 547         "commitdiff" => \&git_commitdiff,
 548         "commitdiff_plain" => \&git_commitdiff_plain,
 549         "commit" => \&git_commit,
 550         "forks" => \&git_forks,
 551         "heads" => \&git_heads,
 552         "history" => \&git_history,
 553         "log" => \&git_log,
 554         "rss" => \&git_rss,
 555         "atom" => \&git_atom,
 556         "search" => \&git_search,
 557         "search_help" => \&git_search_help,
 558         "shortlog" => \&git_shortlog,
 559         "summary" => \&git_summary,
 560         "tag" => \&git_tag,
 561         "tags" => \&git_tags,
 562         "tree" => \&git_tree,
 563         "snapshot" => \&git_snapshot,
 564         "object" => \&git_object,
 565         # those below don't need $project
 566         "opml" => \&git_opml,
 567         "project_list" => \&git_project_list,
 568         "project_index" => \&git_project_index,
 569 );
 570
 571 if (!defined $action) {
 572         if (defined $hash) {
 573                 $action = git_get_type($hash);
 574         } elsif (defined $hash_base && defined $file_name) {
 575                 $action = git_get_type("$hash_base:$file_name");
 576         } elsif (defined $project) {
 577                 $action = 'summary';
 578         } else {
 579                 $action = 'project_list';
 580         }
 581 }
 582 if (!defined($actions{$action})) {
 583         die_error(400, "Unknown action");
 584 }
 585 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 586     !$project) {
 587         die_error(400, "Project needed");
 588 }
 589 $actions{$action}->();
 590 exit;
 591
 592 ## ======================================================================
 593 ## action links
 594
 595 sub href (%) {
 596         my %params = @_;
 597         # default is to use -absolute url() i.e. $my_uri
 598         my $href = $params{-full} ? $my_url : $my_uri;
 599
 600         # XXX: Warning: If you touch this, check the search form for updating,
 601         # too.
 602
 603         my @mapping = (
 604                 project => "p",
 605                 action => "a",
 606                 file_name => "f",
 607                 file_parent => "fp",
 608                 hash => "h",
 609                 hash_parent => "hp",
 610                 hash_base => "hb",
 611                 hash_parent_base => "hpb",
 612                 page => "pg",
 613                 order => "o",
 614                 searchtext => "s",
 615                 searchtype => "st",
 616                 snapshot_format => "sf",
 617                 extra_options => "opt",
 618                 search_use_regexp => "sr",
 619         );
 620         my %mapping = @mapping;
 621
 622         $params{'project'} = $project unless exists $params{'project'};
 623
 624         if ($params{-replay}) {
 625                 while (my ($name, $symbol) = each %mapping) {
 626                         if (!exists $params{$name}) {
 627                                 # to allow for multivalued params we use arrayref form
 628                                 $params{$name} = [ $cgi->param($symbol) ];
 629                         }
 630                 }
 631         }
 632
 633         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 634         if ($use_pathinfo) {
 635                 # use PATH_INFO for project name
 636                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # Make sure perl knows it is utf8 encoded so we don't
 870         # cut in the middle of a utf8 multibyte char.
 871         $str = to_utf8($str);
 872
 873         # allow only $len chars, but don't cut a word if it would fit in $add_len
 874         # if it doesn't fit, cut it if it's still longer than the dots we would add
 875         # remove chopped character entities entirely
 876
 877         # when chopping in the middle, distribute $len into left and right part
 878         # return early if chopping wouldn't make string shorter
 879         if ($where eq 'center') {
 880                 return $str if ($len + 5 >= length($str)); # filler is length 5
 881                 $len = int($len/2);
 882         } else {
 883                 return $str if ($len + 4 >= length($str)); # filler is length 4
 884         }
 885
 886         # regexps: ending and beginning with word part up to $add_len
 887         my $endre = qr/.{$len}\w{0,$add_len}/;
 888         my $begre = qr/\w{0,$add_len}.{$len}/;
 889
 890         if ($where eq 'left') {
 891                 $str =~ m/^(.*?)($begre)$/;
 892                 my ($lead, $body) = ($1, $2);
 893                 if (length($lead) > 4) {
 894                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 895                         $lead = " ...";
 896                 }
 897                 return "$lead$body";
 898
 899         } elsif ($where eq 'center') {
 900                 $str =~ m/^($endre)(.*)$/;
 901                 my ($left, $str)  = ($1, $2);
 902                 $str =~ m/^(.*?)($begre)$/;
 903                 my ($mid, $right) = ($1, $2);
 904                 if (length($mid) > 5) {
 905                         $left  =~ s/&[^;]*$//;
 906                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 907                         $mid = " ... ";
 908                 }
 909                 return "$left$mid$right";
 910
 911         } else {
 912                 $str =~ m/^($endre)(.*)$/;
 913                 my $body = $1;
 914                 my $tail = $2;
 915                 if (length($tail) > 4) {
 916                         $body =~ s/&[^;]*$//;
 917                         $tail = "... ";
 918                 }
 919                 return "$body$tail";
 920         }
 921 }
 922
 923 # takes the same arguments as chop_str, but also wraps a <span> around the
 924 # result with a title attribute if it does get chopped. Additionally, the
 925 # string is HTML-escaped.
 926 sub chop_and_escape_str {
 927         my ($str) = @_;
 928
 929         my $chopped = chop_str(@_);
 930         if ($chopped eq $str) {
 931                 return esc_html($chopped);
 932         } else {
 933                 $str =~ s/([[:cntrl:]])/?/g;
 934                 return $cgi->span({-title=>$str}, esc_html($chopped));
 935         }
 936 }
 937
 938 ## ----------------------------------------------------------------------
 939 ## functions returning short strings
 940
 941 # CSS class for given age value (in seconds)
 942 sub age_class {
 943         my $age = shift;
 944
 945         if (!defined $age) {
 946                 return "noage";
 947         } elsif ($age < 60*60*2) {
 948                 return "age0";
 949         } elsif ($age < 60*60*24*2) {
 950                 return "age1";
 951         } else {
 952                 return "age2";
 953         }
 954 }
 955
 956 # convert age in seconds to "nn units ago" string
 957 sub age_string {
 958         my $age = shift;
 959         my $age_str;
 960
 961         if ($age > 60*60*24*365*2) {
 962                 $age_str = (int $age/60/60/24/365);
 963                 $age_str .= " years ago";
 964         } elsif ($age > 60*60*24*(365/12)*2) {
 965                 $age_str = int $age/60/60/24/(365/12);
 966                 $age_str .= " months ago";
 967         } elsif ($age > 60*60*24*7*2) {
 968                 $age_str = int $age/60/60/24/7;
 969                 $age_str .= " weeks ago";
 970         } elsif ($age > 60*60*24*2) {
 971                 $age_str = int $age/60/60/24;
 972                 $age_str .= " days ago";
 973         } elsif ($age > 60*60*2) {
 974                 $age_str = int $age/60/60;
 975                 $age_str .= " hours ago";
 976         } elsif ($age > 60*2) {
 977                 $age_str = int $age/60;
 978                 $age_str .= " min ago";
 979         } elsif ($age > 2) {
 980                 $age_str = int $age;
 981                 $age_str .= " sec ago";
 982         } else {
 983                 $age_str .= " right now";
 984         }
 985         return $age_str;
 986 }
 987
 988 use constant {
 989         S_IFINVALID => 0030000,
 990         S_IFGITLINK => 0160000,
 991 };
 992
 993 # submodule/subproject, a commit object reference
 994 sub S_ISGITLINK($) {
 995         my $mode = shift;
 996
 997         return (($mode & S_IFMT) == S_IFGITLINK)
 998 }
 999
1000 # convert file mode in octal to symbolic file mode string
1001 sub mode_str {
1002         my $mode = oct shift;
1003
1004         if (S_ISGITLINK($mode)) {
1005                 return 'm---------';
1006         } elsif (S_ISDIR($mode & S_IFMT)) {
1007                 return 'drwxr-xr-x';
1008         } elsif (S_ISLNK($mode)) {
1009                 return 'lrwxrwxrwx';
1010         } elsif (S_ISREG($mode)) {
1011                 # git cares only about the executable bit
1012                 if ($mode & S_IXUSR) {
1013                         return '-rwxr-xr-x';
1014                 } else {
1015                         return '-rw-r--r--';
1016                 };
1017         } else {
1018                 return '----------';
1019         }
1020 }
1021
1022 # convert file mode in octal to file type string
1023 sub file_type {
1024         my $mode = shift;
1025
1026         if ($mode !~ m/^[0-7]+$/) {
1027                 return $mode;
1028         } else {
1029                 $mode = oct $mode;
1030         }
1031
1032         if (S_ISGITLINK($mode)) {
1033                 return "submodule";
1034         } elsif (S_ISDIR($mode & S_IFMT)) {
1035                 return "directory";
1036         } elsif (S_ISLNK($mode)) {
1037                 return "symlink";
1038         } elsif (S_ISREG($mode)) {
1039                 return "file";
1040         } else {
1041                 return "unknown";
1042         }
1043 }
1044
1045 # convert file mode in octal to file type description string
1046 sub file_type_long {
1047         my $mode = shift;
1048
1049         if ($mode !~ m/^[0-7]+$/) {
1050                 return $mode;
1051         } else {
1052                 $mode = oct $mode;
1053         }
1054
1055         if (S_ISGITLINK($mode)) {
1056                 return "submodule";
1057         } elsif (S_ISDIR($mode & S_IFMT)) {
1058                 return "directory";
1059         } elsif (S_ISLNK($mode)) {
1060                 return "symlink";
1061         } elsif (S_ISREG($mode)) {
1062                 if ($mode & S_IXUSR) {
1063                         return "executable";
1064                 } else {
1065                         return "file";
1066                 };
1067         } else {
1068                 return "unknown";
1069         }
1070 }
1071
1072
1073 ## ----------------------------------------------------------------------
1074 ## functions returning short HTML fragments, or transforming HTML fragments
1075 ## which don't belong to other sections
1076
1077 # format line of commit message.
1078 sub format_log_line_html {
1079         my $line = shift;
1080
1081         $line = esc_html($line, -nbsp=>1);
1082         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1083                 my $hash_text = $1;
1084                 my $link =
1085                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1086                                 -class => "text"}, $hash_text);
1087                 $line =~ s/$hash_text/$link/;
1088         }
1089         return $line;
1090 }
1091
1092 # format marker of refs pointing to given object
1093 sub format_ref_marker {
1094         my ($refs, $id) = @_;
1095         my $markers = '';
1096
1097         if (defined $refs->{$id}) {
1098                 foreach my $ref (@{$refs->{$id}}) {
1099                         my ($type, $name) = qw();
1100                         # e.g. tags/v2.6.11 or heads/next
1101                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1102                                 $type = $1;
1103                                 $name = $2;
1104                         } else {
1105                                 $type = "ref";
1106                                 $name = $ref;
1107                         }
1108
1109                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1110                                     esc_html($name) . "</span>";
1111                 }
1112         }
1113
1114         if ($markers) {
1115                 return ' <span class="refs">'. $markers . '</span>';
1116         } else {
1117                 return "";
1118         }
1119 }
1120
1121 # format, perhaps shortened and with markers, title line
1122 sub format_subject_html {
1123         my ($long, $short, $href, $extra) = @_;
1124         $extra = '' unless defined($extra);
1125
1126         if (length($short) < length($long)) {
1127                 return $cgi->a({-href => $href, -class => "list subject",
1128                                 -title => to_utf8($long)},
1129                        esc_html($short) . $extra);
1130         } else {
1131                 return $cgi->a({-href => $href, -class => "list subject"},
1132                        esc_html($long)  . $extra);
1133         }
1134 }
1135
1136 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1137 sub format_git_diff_header_line {
1138         my $line = shift;
1139         my $diffinfo = shift;
1140         my ($from, $to) = @_;
1141
1142         if ($diffinfo->{'nparents'}) {
1143                 # combined diff
1144                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1145                 if ($to->{'href'}) {
1146                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1147                                          esc_path($to->{'file'}));
1148                 } else { # file was deleted (no href)
1149                         $line .= esc_path($to->{'file'});
1150                 }
1151         } else {
1152                 # "ordinary" diff
1153                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1154                 if ($from->{'href'}) {
1155                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1156                                          'a/' . esc_path($from->{'file'}));
1157                 } else { # file was added (no href)
1158                         $line .= 'a/' . esc_path($from->{'file'});
1159                 }
1160                 $line .= ' ';
1161                 if ($to->{'href'}) {
1162                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1163                                          'b/' . esc_path($to->{'file'}));
1164                 } else { # file was deleted
1165                         $line .= 'b/' . esc_path($to->{'file'});
1166                 }
1167         }
1168
1169         return "<div class=\"diff header\">$line</div>\n";
1170 }
1171
1172 # format extended diff header line, before patch itself
1173 sub format_extended_diff_header_line {
1174         my $line = shift;
1175         my $diffinfo = shift;
1176         my ($from, $to) = @_;
1177
1178         # match <path>
1179         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1180                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1181                                        esc_path($from->{'file'}));
1182         }
1183         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1184                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1185                                  esc_path($to->{'file'}));
1186         }
1187         # match single <mode>
1188         if ($line =~ m/\s(\d{6})$/) {
1189                 $line .= '<span class="info"> (' .
1190                          file_type_long($1) .
1191                          ')</span>';
1192         }
1193         # match <hash>
1194         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1195                 # can match only for combined diff
1196                 $line = 'index ';
1197                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1198                         if ($from->{'href'}[$i]) {
1199                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1200                                                   -class=>"hash"},
1201                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1202                         } else {
1203                                 $line .= '0' x 7;
1204                         }
1205                         # separator
1206                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1207                 }
1208                 $line .= '..';
1209                 if ($to->{'href'}) {
1210                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1211                                          substr($diffinfo->{'to_id'},0,7));
1212                 } else {
1213                         $line .= '0' x 7;
1214                 }
1215
1216         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1217                 # can match only for ordinary diff
1218                 my ($from_link, $to_link);
1219                 if ($from->{'href'}) {
1220                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1221                                              substr($diffinfo->{'from_id'},0,7));
1222                 } else {
1223                         $from_link = '0' x 7;
1224                 }
1225                 if ($to->{'href'}) {
1226                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1227                                            substr($diffinfo->{'to_id'},0,7));
1228                 } else {
1229                         $to_link = '0' x 7;
1230                 }
1231                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1232                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1233         }
1234
1235         return $line . "<br/>\n";
1236 }
1237
1238 # format from-file/to-file diff header
1239 sub format_diff_from_to_header {
1240         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1241         my $line;
1242         my $result = '';
1243
1244         $line = $from_line;
1245         #assert($line =~ m/^---/) if DEBUG;
1246         # no extra formatting for "^--- /dev/null"
1247         if (! $diffinfo->{'nparents'}) {
1248                 # ordinary (single parent) diff
1249                 if ($line =~ m!^--- "?a/!) {
1250                         if ($from->{'href'}) {
1251                                 $line = '--- a/' .
1252                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1253                                                 esc_path($from->{'file'}));
1254                         } else {
1255                                 $line = '--- a/' .
1256                                         esc_path($from->{'file'});
1257                         }
1258                 }
1259                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1260
1261         } else {
1262                 # combined diff (merge commit)
1263                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1264                         if ($from->{'href'}[$i]) {
1265                                 $line = '--- ' .
1266                                         $cgi->a({-href=>href(action=>"blobdiff",
1267                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1268                                                              hash_parent_base=>$parents[$i],
1269                                                              file_parent=>$from->{'file'}[$i],
1270                                                              hash=>$diffinfo->{'to_id'},
1271                                                              hash_base=>$hash,
1272                                                              file_name=>$to->{'file'}),
1273                                                  -class=>"path",
1274                                                  -title=>"diff" . ($i+1)},
1275                                                 $i+1) .
1276                                         '/' .
1277                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1278                                                 esc_path($from->{'file'}[$i]));
1279                         } else {
1280                                 $line = '--- /dev/null';
1281                         }
1282                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1283                 }
1284         }
1285
1286         $line = $to_line;
1287         #assert($line =~ m/^\+\+\+/) if DEBUG;
1288         # no extra formatting for "^+++ /dev/null"
1289         if ($line =~ m!^\+\+\+ "?b/!) {
1290                 if ($to->{'href'}) {
1291                         $line = '+++ b/' .
1292                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1293                                         esc_path($to->{'file'}));
1294                 } else {
1295                         $line = '+++ b/' .
1296                                 esc_path($to->{'file'});
1297                 }
1298         }
1299         $result .= qq!<div class="diff to_file">$line</div>\n!;
1300
1301         return $result;
1302 }
1303
1304 # create note for patch simplified by combined diff
1305 sub format_diff_cc_simplified {
1306         my ($diffinfo, @parents) = @_;
1307         my $result = '';
1308
1309         $result .= "<div class=\"diff header\">" .
1310                    "diff --cc ";
1311         if (!is_deleted($diffinfo)) {
1312                 $result .= $cgi->a({-href => href(action=>"blob",
1313                                                   hash_base=>$hash,
1314                                                   hash=>$diffinfo->{'to_id'},
1315                                                   file_name=>$diffinfo->{'to_file'}),
1316                                     -class => "path"},
1317                                    esc_path($diffinfo->{'to_file'}));
1318         } else {
1319                 $result .= esc_path($diffinfo->{'to_file'});
1320         }
1321         $result .= "</div>\n" . # class="diff header"
1322                    "<div class=\"diff nodifferences\">" .
1323                    "Simple merge" .
1324                    "</div>\n"; # class="diff nodifferences"
1325
1326         return $result;
1327 }
1328
1329 # format patch (diff) line (not to be used for diff headers)
1330 sub format_diff_line {
1331         my $line = shift;
1332         my ($from, $to) = @_;
1333         my $diff_class = "";
1334
1335         chomp $line;
1336
1337         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1338                 # combined diff
1339                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1340                 if ($line =~ m/^\@{3}/) {
1341                         $diff_class = " chunk_header";
1342                 } elsif ($line =~ m/^\\/) {
1343                         $diff_class = " incomplete";
1344                 } elsif ($prefix =~ tr/+/+/) {
1345                         $diff_class = " add";
1346                 } elsif ($prefix =~ tr/-/-/) {
1347                         $diff_class = " rem";
1348                 }
1349         } else {
1350                 # assume ordinary diff
1351                 my $char = substr($line, 0, 1);
1352                 if ($char eq '+') {
1353                         $diff_class = " add";
1354                 } elsif ($char eq '-') {
1355                         $diff_class = " rem";
1356                 } elsif ($char eq '@') {
1357                         $diff_class = " chunk_header";
1358                 } elsif ($char eq "\\") {
1359                         $diff_class = " incomplete";
1360                 }
1361         }
1362         $line = untabify($line);
1363         if ($from && $to && $line =~ m/^\@{2} /) {
1364                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1365                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1366
1367                 $from_lines = 0 unless defined $from_lines;
1368                 $to_lines   = 0 unless defined $to_lines;
1369
1370                 if ($from->{'href'}) {
1371                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1372                                              -class=>"list"}, $from_text);
1373                 }
1374                 if ($to->{'href'}) {
1375                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1376                                              -class=>"list"}, $to_text);
1377                 }
1378                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1379                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1380                 return "<div class=\"diff$diff_class\">$line</div>\n";
1381         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1382                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1383                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1384
1385                 @from_text = split(' ', $ranges);
1386                 for (my $i = 0; $i < @from_text; ++$i) {
1387                         ($from_start[$i], $from_nlines[$i]) =
1388                                 (split(',', substr($from_text[$i], 1)), 0);
1389                 }
1390
1391                 $to_text   = pop @from_text;
1392                 $to_start  = pop @from_start;
1393                 $to_nlines = pop @from_nlines;
1394
1395                 $line = "<span class=\"chunk_info\">$prefix ";
1396                 for (my $i = 0; $i < @from_text; ++$i) {
1397                         if ($from->{'href'}[$i]) {
1398                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1399                                                   -class=>"list"}, $from_text[$i]);
1400                         } else {
1401                                 $line .= $from_text[$i];
1402                         }
1403                         $line .= " ";
1404                 }
1405                 if ($to->{'href'}) {
1406                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1407                                           -class=>"list"}, $to_text);
1408                 } else {
1409                         $line .= $to_text;
1410                 }
1411                 $line .= " $prefix</span>" .
1412                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1413                 return "<div class=\"diff$diff_class\">$line</div>\n";
1414         }
1415         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1416 }
1417
1418 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1419 # linked.  Pass the hash of the tree/commit to snapshot.
1420 sub format_snapshot_links {
1421         my ($hash) = @_;
1422         my @snapshot_fmts = gitweb_check_feature('snapshot');
1423         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1424         my $num_fmts = @snapshot_fmts;
1425         if ($num_fmts > 1) {
1426                 # A parenthesized list of links bearing format names.
1427                 # e.g. "snapshot (_tar.gz_ _zip_)"
1428                 return "snapshot (" . join(' ', map
1429                         $cgi->a({
1430                                 -href => href(
1431                                         action=>"snapshot",
1432                                         hash=>$hash,
1433                                         snapshot_format=>$_
1434                                 )
1435                         }, $known_snapshot_formats{$_}{'display'})
1436                 , @snapshot_fmts) . ")";
1437         } elsif ($num_fmts == 1) {
1438                 # A single "snapshot" link whose tooltip bears the format name.
1439                 # i.e. "_snapshot_"
1440                 my ($fmt) = @snapshot_fmts;
1441                 return
1442                         $cgi->a({
1443                                 -href => href(
1444                                         action=>"snapshot",
1445                                         hash=>$hash,
1446                                         snapshot_format=>$fmt
1447                                 ),
1448                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1449                         }, "snapshot");
1450         } else { # $num_fmts == 0
1451                 return undef;
1452         }
1453 }
1454
1455 ## ......................................................................
1456 ## functions returning values to be passed, perhaps after some
1457 ## transformation, to other functions; e.g. returning arguments to href()
1458
1459 # returns hash to be passed to href to generate gitweb URL
1460 # in -title key it returns description of link
1461 sub get_feed_info {
1462         my $format = shift || 'Atom';
1463         my %res = (action => lc($format));
1464
1465         # feed links are possible only for project views
1466         return unless (defined $project);
1467         # some views should link to OPML, or to generic project feed,
1468         # or don't have specific feed yet (so they should use generic)
1469         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1470
1471         my $branch;
1472         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1473         # from tag links; this also makes possible to detect branch links
1474         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1475             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1476                 $branch = $1;
1477         }
1478         # find log type for feed description (title)
1479         my $type = 'log';
1480         if (defined $file_name) {
1481                 $type  = "history of $file_name";
1482                 $type .= "/" if ($action eq 'tree');
1483                 $type .= " on '$branch'" if (defined $branch);
1484         } else {
1485                 $type = "log of $branch" if (defined $branch);
1486         }
1487
1488         $res{-title} = $type;
1489         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1490         $res{'file_name'} = $file_name;
1491
1492         return %res;
1493 }
1494
1495 ## ----------------------------------------------------------------------
1496 ## git utility subroutines, invoking git commands
1497
1498 # returns path to the core git executable and the --git-dir parameter as list
1499 sub git_cmd {
1500         return $GIT, '--git-dir='.$git_dir;
1501 }
1502
1503 # quote the given arguments for passing them to the shell
1504 # quote_command("command", "arg 1", "arg with ' and ! characters")
1505 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1506 # Try to avoid using this function wherever possible.
1507 sub quote_command {
1508         return join(' ',
1509                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1510 }
1511
1512 # get HEAD ref of given project as hash
1513 sub git_get_head_hash {
1514         my $project = shift;
1515         my $o_git_dir = $git_dir;
1516         my $retval = undef;
1517         $git_dir = "$projectroot/$project";
1518         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1519                 my $head = <$fd>;
1520                 close $fd;
1521                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1522                         $retval = $1;
1523                 }
1524         }
1525         if (defined $o_git_dir) {
1526                 $git_dir = $o_git_dir;
1527         }
1528         return $retval;
1529 }
1530
1531 # get type of given object
1532 sub git_get_type {
1533         my $hash = shift;
1534
1535         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1536         my $type = <$fd>;
1537         close $fd or return;
1538         chomp $type;
1539         return $type;
1540 }
1541
1542 # repository configuration
1543 our $config_file = '';
1544 our %config;
1545
1546 # store multiple values for single key as anonymous array reference
1547 # single values stored directly in the hash, not as [ <value> ]
1548 sub hash_set_multi {
1549         my ($hash, $key, $value) = @_;
1550
1551         if (!exists $hash->{$key}) {
1552                 $hash->{$key} = $value;
1553         } elsif (!ref $hash->{$key}) {
1554                 $hash->{$key} = [ $hash->{$key}, $value ];
1555         } else {
1556                 push @{$hash->{$key}}, $value;
1557         }
1558 }
1559
1560 # return hash of git project configuration
1561 # optionally limited to some section, e.g. 'gitweb'
1562 sub git_parse_project_config {
1563         my $section_regexp = shift;
1564         my %config;
1565
1566         local $/ = "\0";
1567
1568         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1569                 or return;
1570
1571         while (my $keyval = <$fh>) {
1572                 chomp $keyval;
1573                 my ($key, $value) = split(/\n/, $keyval, 2);
1574
1575                 hash_set_multi(\%config, $key, $value)
1576                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1577         }
1578         close $fh;
1579
1580         return %config;
1581 }
1582
1583 # convert config value to boolean, 'true' or 'false'
1584 # no value, number > 0, 'true' and 'yes' values are true
1585 # rest of values are treated as false (never as error)
1586 sub config_to_bool {
1587         my $val = shift;
1588
1589         # strip leading and trailing whitespace
1590         $val =~ s/^\s+//;
1591         $val =~ s/\s+$//;
1592
1593         return (!defined $val ||               # section.key
1594                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1595                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1596 }
1597
1598 # convert config value to simple decimal number
1599 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1600 # to be multiplied by 1024, 1048576, or 1073741824
1601 sub config_to_int {
1602         my $val = shift;
1603
1604         # strip leading and trailing whitespace
1605         $val =~ s/^\s+//;
1606         $val =~ s/\s+$//;
1607
1608         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1609                 $unit = lc($unit);
1610                 # unknown unit is treated as 1
1611                 return $num * ($unit eq 'g' ? 1073741824 :
1612                                $unit eq 'm' ?    1048576 :
1613                                $unit eq 'k' ?       1024 : 1);
1614         }
1615         return $val;
1616 }
1617
1618 # convert config value to array reference, if needed
1619 sub config_to_multi {
1620         my $val = shift;
1621
1622         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1623 }
1624
1625 sub git_get_project_config {
1626         my ($key, $type) = @_;
1627
1628         # key sanity check
1629         return unless ($key);
1630         $key =~ s/^gitweb\.//;
1631         return if ($key =~ m/\W/);
1632
1633         # type sanity check
1634         if (defined $type) {
1635                 $type =~ s/^--//;
1636                 $type = undef
1637                         unless ($type eq 'bool' || $type eq 'int');
1638         }
1639
1640         # get config
1641         if (!defined $config_file ||
1642             $config_file ne "$git_dir/config") {
1643                 %config = git_parse_project_config('gitweb');
1644                 $config_file = "$git_dir/config";
1645         }
1646
1647         # ensure given type
1648         if (!defined $type) {
1649                 return $config{"gitweb.$key"};
1650         } elsif ($type eq 'bool') {
1651                 # backward compatibility: 'git config --bool' returns true/false
1652                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1653         } elsif ($type eq 'int') {
1654                 return config_to_int($config{"gitweb.$key"});
1655         }
1656         return $config{"gitweb.$key"};
1657 }
1658
1659 # get hash of given path at given ref
1660 sub git_get_hash_by_path {
1661         my $base = shift;
1662         my $path = shift || return undef;
1663         my $type = shift;
1664
1665         $path =~ s,/+$,,;
1666
1667         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1668                 or die_error(500, "Open git-ls-tree failed");
1669         my $line = <$fd>;
1670         close $fd or return undef;
1671
1672         if (!defined $line) {
1673                 # there is no tree or hash given by $path at $base
1674                 return undef;
1675         }
1676
1677         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1678         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1679         if (defined $type && $type ne $2) {
1680                 # type doesn't match
1681                 return undef;
1682         }
1683         return $3;
1684 }
1685
1686 # get path of entry with given hash at given tree-ish (ref)
1687 # used to get 'from' filename for combined diff (merge commit) for renames
1688 sub git_get_path_by_hash {
1689         my $base = shift || return;
1690         my $hash = shift || return;
1691
1692         local $/ = "\0";
1693
1694         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1695                 or return undef;
1696         while (my $line = <$fd>) {
1697                 chomp $line;
1698
1699                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1700                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1701                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1702                         close $fd;
1703                         return $1;
1704                 }
1705         }
1706         close $fd;
1707         return undef;
1708 }
1709
1710 ## ......................................................................
1711 ## git utility functions, directly accessing git repository
1712
1713 sub git_get_project_description {
1714         my $path = shift;
1715
1716         $git_dir = "$projectroot/$path";
1717         open my $fd, "$git_dir/description"
1718                 or return git_get_project_config('description');
1719         my $descr = <$fd>;
1720         close $fd;
1721         if (defined $descr) {
1722                 chomp $descr;
1723         }
1724         return $descr;
1725 }
1726
1727 sub git_get_project_url_list {
1728         my $path = shift;
1729
1730         $git_dir = "$projectroot/$path";
1731         open my $fd, "$git_dir/cloneurl"
1732                 or return wantarray ?
1733                 @{ config_to_multi(git_get_project_config('url')) } :
1734                    config_to_multi(git_get_project_config('url'));
1735         my @git_project_url_list = map { chomp; $_ } <$fd>;
1736         close $fd;
1737
1738         return wantarray ? @git_project_url_list : \@git_project_url_list;
1739 }
1740
1741 sub git_get_projects_list {
1742         my ($filter) = @_;
1743         my @list;
1744
1745         $filter ||= '';
1746         $filter =~ s/\.git$//;
1747
1748         my ($check_forks) = gitweb_check_feature('forks');
1749
1750         if (-d $projects_list) {
1751                 # search in directory
1752                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1753                 # remove the trailing "/"
1754                 $dir =~ s!/+$!!;
1755                 my $pfxlen = length("$dir");
1756                 my $pfxdepth = ($dir =~ tr!/!!);
1757
1758                 File::Find::find({
1759                         follow_fast => 1, # follow symbolic links
1760                         follow_skip => 2, # ignore duplicates
1761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1762                         wanted => sub {
1763                                 # skip project-list toplevel, if we get it.
1764                                 return if (m!^[/.]$!);
1765                                 # only directories can be git repositories
1766                                 return unless (-d $_);
1767                                 # don't traverse too deep (Find is super slow on os x)
1768                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1769                                         $File::Find::prune = 1;
1770                                         return;
1771                                 }
1772
1773                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1774                                 # we check related file in $projectroot
1775                                 if ($check_forks and $subdir =~ m#/.#) {
1776                                         $File::Find::prune = 1;
1777                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1778                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1779                                         $File::Find::prune = 1;
1780                                 }
1781                         },
1782                 }, "$dir");
1783
1784         } elsif (-f $projects_list) {
1785                 # read from file(url-encoded):
1786                 # 'git%2Fgit.git Linus+Torvalds'
1787                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1788                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1789                 my %paths;
1790                 open my ($fd), $projects_list or return;
1791         PROJECT:
1792                 while (my $line = <$fd>) {
1793                         chomp $line;
1794                         my ($path, $owner) = split ' ', $line;
1795                         $path = unescape($path);
1796                         $owner = unescape($owner);
1797                         if (!defined $path) {
1798                                 next;
1799                         }
1800                         if ($filter ne '') {
1801                                 # looking for forks;
1802                                 my $pfx = substr($path, 0, length($filter));
1803                                 if ($pfx ne $filter) {
1804                                         next PROJECT;
1805                                 }
1806                                 my $sfx = substr($path, length($filter));
1807                                 if ($sfx !~ /^\/.*\.git$/) {
1808                                         next PROJECT;
1809                                 }
1810                         } elsif ($check_forks) {
1811                         PATH:
1812                                 foreach my $filter (keys %paths) {
1813                                         # looking for forks;
1814                                         my $pfx = substr($path, 0, length($filter));
1815                                         if ($pfx ne $filter) {
1816                                                 next PATH;
1817                                         }
1818                                         my $sfx = substr($path, length($filter));
1819                                         if ($sfx !~ /^\/.*\.git$/) {
1820                                                 next PATH;
1821                                         }
1822                                         # is a fork, don't include it in
1823                                         # the list
1824                                         next PROJECT;
1825                                 }
1826                         }
1827                         if (check_export_ok("$projectroot/$path")) {
1828                                 my $pr = {
1829                                         path => $path,
1830                                         owner => to_utf8($owner),
1831                                 };
1832                                 push @list, $pr;
1833                                 (my $forks_path = $path) =~ s/\.git$//;
1834                                 $paths{$forks_path}++;
1835                         }
1836                 }
1837                 close $fd;
1838         }
1839         return @list;
1840 }
1841
1842 our $gitweb_project_owner = undef;
1843 sub git_get_project_list_from_file {
1844
1845         return if (defined $gitweb_project_owner);
1846
1847         $gitweb_project_owner = {};
1848         # read from file (url-encoded):
1849         # 'git%2Fgit.git Linus+Torvalds'
1850         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1851         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1852         if (-f $projects_list) {
1853                 open (my $fd , $projects_list);
1854                 while (my $line = <$fd>) {
1855                         chomp $line;
1856                         my ($pr, $ow) = split ' ', $line;
1857                         $pr = unescape($pr);
1858                         $ow = unescape($ow);
1859                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1860                 }
1861                 close $fd;
1862         }
1863 }
1864
1865 sub git_get_project_owner {
1866         my $project = shift;
1867         my $owner;
1868
1869         return undef unless $project;
1870         $git_dir = "$projectroot/$project";
1871
1872         if (!defined $gitweb_project_owner) {
1873                 git_get_project_list_from_file();
1874         }
1875
1876         if (exists $gitweb_project_owner->{$project}) {
1877                 $owner = $gitweb_project_owner->{$project};
1878         }
1879         if (!defined $owner){
1880                 $owner = git_get_project_config('owner');
1881         }
1882         if (!defined $owner) {
1883                 $owner = get_file_owner("$git_dir");
1884         }
1885
1886         return $owner;
1887 }
1888
1889 sub git_get_last_activity {
1890         my ($path) = @_;
1891         my $fd;
1892
1893         $git_dir = "$projectroot/$path";
1894         open($fd, "-|", git_cmd(), 'for-each-ref',
1895              '--format=%(committer)',
1896              '--sort=-committerdate',
1897              '--count=1',
1898              'refs/heads') or return;
1899         my $most_recent = <$fd>;
1900         close $fd or return;
1901         if (defined $most_recent &&
1902             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1903                 my $timestamp = $1;
1904                 my $age = time - $timestamp;
1905                 return ($age, age_string($age));
1906         }
1907         return (undef, undef);
1908 }
1909
1910 sub git_get_references {
1911         my $type = shift || "";
1912         my %refs;
1913         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1914         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1915         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1916                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1917                 or return;
1918
1919         while (my $line = <$fd>) {
1920                 chomp $line;
1921                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1922                         if (defined $refs{$1}) {
1923                                 push @{$refs{$1}}, $2;
1924                         } else {
1925                                 $refs{$1} = [ $2 ];
1926                         }
1927                 }
1928         }
1929         close $fd or return;
1930         return \%refs;
1931 }
1932
1933 sub git_get_rev_name_tags {
1934         my $hash = shift || return undef;
1935
1936         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1937                 or return;
1938         my $name_rev = <$fd>;
1939         close $fd;
1940
1941         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1942                 return $1;
1943         } else {
1944                 # catches also '$hash undefined' output
1945                 return undef;
1946         }
1947 }
1948
1949 ## ----------------------------------------------------------------------
1950 ## parse to hash functions
1951
1952 sub parse_date {
1953         my $epoch = shift;
1954         my $tz = shift || "-0000";
1955
1956         my %date;
1957         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1958         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1959         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1960         $date{'hour'} = $hour;
1961         $date{'minute'} = $min;
1962         $date{'mday'} = $mday;
1963         $date{'day'} = $days[$wday];
1964         $date{'month'} = $months[$mon];
1965         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1966                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1967         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1968                              $mday, $months[$mon], $hour ,$min;
1969         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1970                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1971
1972         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1973         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1974         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1975         $date{'hour_local'} = $hour;
1976         $date{'minute_local'} = $min;
1977         $date{'tz_local'} = $tz;
1978         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1979                                   1900+$year, $mon+1, $mday,
1980                                   $hour, $min, $sec, $tz);
1981         return %date;
1982 }
1983
1984 sub parse_tag {
1985         my $tag_id = shift;
1986         my %tag;
1987         my @comment;
1988
1989         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1990         $tag{'id'} = $tag_id;
1991         while (my $line = <$fd>) {
1992                 chomp $line;
1993                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1994                         $tag{'object'} = $1;
1995                 } elsif ($line =~ m/^type (.+)$/) {
1996                         $tag{'type'} = $1;
1997                 } elsif ($line =~ m/^tag (.+)$/) {
1998                         $tag{'name'} = $1;
1999                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2000                         $tag{'author'} = $1;
2001                         $tag{'epoch'} = $2;
2002                         $tag{'tz'} = $3;
2003                 } elsif ($line =~ m/--BEGIN/) {
2004                         push @comment, $line;
2005                         last;
2006                 } elsif ($line eq "") {
2007                         last;
2008                 }
2009         }
2010         push @comment, <$fd>;
2011         $tag{'comment'} = \@comment;
2012         close $fd or return;
2013         if (!defined $tag{'name'}) {
2014                 return
2015         };
2016         return %tag
2017 }
2018
2019 sub parse_commit_text {
2020         my ($commit_text, $withparents) = @_;
2021         my @commit_lines = split '\n', $commit_text;
2022         my %co;
2023
2024         pop @commit_lines; # Remove '\0'
2025
2026         if (! @commit_lines) {
2027                 return;
2028         }
2029
2030         my $header = shift @commit_lines;
2031         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2032                 return;
2033         }
2034         ($co{'id'}, my @parents) = split ' ', $header;
2035         while (my $line = shift @commit_lines) {
2036                 last if $line eq "\n";
2037                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2038                         $co{'tree'} = $1;
2039                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2040                         push @parents, $1;
2041                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2042                         $co{'author'} = $1;
2043                         $co{'author_epoch'} = $2;
2044                         $co{'author_tz'} = $3;
2045                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2046                                 $co{'author_name'}  = $1;
2047                                 $co{'author_email'} = $2;
2048                         } else {
2049                                 $co{'author_name'} = $co{'author'};
2050                         }
2051                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2052                         $co{'committer'} = $1;
2053                         $co{'committer_epoch'} = $2;
2054                         $co{'committer_tz'} = $3;
2055                         $co{'committer_name'} = $co{'committer'};
2056                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2057                                 $co{'committer_name'}  = $1;
2058                                 $co{'committer_email'} = $2;
2059                         } else {
2060                                 $co{'committer_name'} = $co{'committer'};
2061                         }
2062                 }
2063         }
2064         if (!defined $co{'tree'}) {
2065                 return;
2066         };
2067         $co{'parents'} = \@parents;
2068         $co{'parent'} = $parents[0];
2069
2070         foreach my $title (@commit_lines) {
2071                 $title =~ s/^    //;
2072                 if ($title ne "") {
2073                         $co{'title'} = chop_str($title, 80, 5);
2074                         # remove leading stuff of merges to make the interesting part visible
2075                         if (length($title) > 50) {
2076                                 $title =~ s/^Automatic //;
2077                                 $title =~ s/^merge (of|with) /Merge ... /i;
2078                                 if (length($title) > 50) {
2079                                         $title =~ s/(http|rsync):\/\///;
2080                                 }
2081                                 if (length($title) > 50) {
2082                                         $title =~ s/(master|www|rsync)\.//;
2083                                 }
2084                                 if (length($title) > 50) {
2085                                         $title =~ s/kernel.org:?//;
2086                                 }
2087                                 if (length($title) > 50) {
2088                                         $title =~ s/\/pub\/scm//;
2089                                 }
2090                         }
2091                         $co{'title_short'} = chop_str($title, 50, 5);
2092                         last;
2093                 }
2094         }
2095         if ($co{'title'} eq "") {
2096                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2097         }
2098         # remove added spaces
2099         foreach my $line (@commit_lines) {
2100                 $line =~ s/^    //;
2101         }
2102         $co{'comment'} = \@commit_lines;
2103
2104         my $age = time - $co{'committer_epoch'};
2105         $co{'age'} = $age;
2106         $co{'age_string'} = age_string($age);
2107         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2108         if ($age > 60*60*24*7*2) {
2109                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110                 $co{'age_string_age'} = $co{'age_string'};
2111         } else {
2112                 $co{'age_string_date'} = $co{'age_string'};
2113                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2114         }
2115         return %co;
2116 }
2117
2118 sub parse_commit {
2119         my ($commit_id) = @_;
2120         my %co;
2121
2122         local $/ = "\0";
2123
2124         open my $fd, "-|", git_cmd(), "rev-list",
2125                 "--parents",
2126                 "--header",
2127                 "--max-count=1",
2128                 $commit_id,
2129                 "--",
2130                 or die_error(500, "Open git-rev-list failed");
2131         %co = parse_commit_text(<$fd>, 1);
2132         close $fd;
2133
2134         return %co;
2135 }
2136
2137 sub parse_commits {
2138         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2139         my @cos;
2140
2141         $maxcount ||= 1;
2142         $skip ||= 0;
2143
2144         local $/ = "\0";
2145
2146         open my $fd, "-|", git_cmd(), "rev-list",
2147                 "--header",
2148                 @args,
2149                 ("--max-count=" . $maxcount),
2150                 ("--skip=" . $skip),
2151                 @extra_options,
2152                 $commit_id,
2153                 "--",
2154                 ($filename ? ($filename) : ())
2155                 or die_error(500, "Open git-rev-list failed");
2156         while (my $line = <$fd>) {
2157                 my %co = parse_commit_text($line);
2158                 push @cos, \%co;
2159         }
2160         close $fd;
2161
2162         return wantarray ? @cos : \@cos;
2163 }
2164
2165 # parse line of git-diff-tree "raw" output
2166 sub parse_difftree_raw_line {
2167         my $line = shift;
2168         my %res;
2169
2170         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2171         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2172         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2173                 $res{'from_mode'} = $1;
2174                 $res{'to_mode'} = $2;
2175                 $res{'from_id'} = $3;
2176                 $res{'to_id'} = $4;
2177                 $res{'status'} = $5;
2178                 $res{'similarity'} = $6;
2179                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2180                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2181                 } else {
2182                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2183                 }
2184         }
2185         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2186         # combined diff (for merge commit)
2187         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2188                 $res{'nparents'}  = length($1);
2189                 $res{'from_mode'} = [ split(' ', $2) ];
2190                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2191                 $res{'from_id'} = [ split(' ', $3) ];
2192                 $res{'to_id'} = pop @{$res{'from_id'}};
2193                 $res{'status'} = [ split('', $4) ];
2194                 $res{'to_file'} = unquote($5);
2195         }
2196         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2197         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2198                 $res{'commit'} = $1;
2199         }
2200
2201         return wantarray ? %res : \%res;
2202 }
2203
2204 # wrapper: return parsed line of git-diff-tree "raw" output
2205 # (the argument might be raw line, or parsed info)
2206 sub parsed_difftree_line {
2207         my $line_or_ref = shift;
2208
2209         if (ref($line_or_ref) eq "HASH") {
2210                 # pre-parsed (or generated by hand)
2211                 return $line_or_ref;
2212         } else {
2213                 return parse_difftree_raw_line($line_or_ref);
2214         }
2215 }
2216
2217 # parse line of git-ls-tree output
2218 sub parse_ls_tree_line ($;%) {
2219         my $line = shift;
2220         my %opts = @_;
2221         my %res;
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2225
2226         $res{'mode'} = $1;
2227         $res{'type'} = $2;
2228         $res{'hash'} = $3;
2229         if ($opts{'-z'}) {
2230                 $res{'name'} = $4;
2231         } else {
2232                 $res{'name'} = unquote($4);
2233         }
2234
2235         return wantarray ? %res : \%res;
2236 }
2237
2238 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2239 sub parse_from_to_diffinfo {
2240         my ($diffinfo, $from, $to, @parents) = @_;
2241
2242         if ($diffinfo->{'nparents'}) {
2243                 # combined diff
2244                 $from->{'file'} = [];
2245                 $from->{'href'} = [];
2246                 fill_from_file_info($diffinfo, @parents)
2247                         unless exists $diffinfo->{'from_file'};
2248                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2249                         $from->{'file'}[$i] =
2250                                 defined $diffinfo->{'from_file'}[$i] ?
2251                                         $diffinfo->{'from_file'}[$i] :
2252                                         $diffinfo->{'to_file'};
2253                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2254                                 $from->{'href'}[$i] = href(action=>"blob",
2255                                                            hash_base=>$parents[$i],
2256                                                            hash=>$diffinfo->{'from_id'}[$i],
2257                                                            file_name=>$from->{'file'}[$i]);
2258                         } else {
2259                                 $from->{'href'}[$i] = undef;
2260                         }
2261                 }
2262         } else {
2263                 # ordinary (not combined) diff
2264                 $from->{'file'} = $diffinfo->{'from_file'};
2265                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2266                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2267                                                hash=>$diffinfo->{'from_id'},
2268                                                file_name=>$from->{'file'});
2269                 } else {
2270                         delete $from->{'href'};
2271                 }
2272         }
2273
2274         $to->{'file'} = $diffinfo->{'to_file'};
2275         if (!is_deleted($diffinfo)) { # file exists in result
2276                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2277                                      hash=>$diffinfo->{'to_id'},
2278                                      file_name=>$to->{'file'});
2279         } else {
2280                 delete $to->{'href'};
2281         }
2282 }
2283
2284 ## ......................................................................
2285 ## parse to array of hashes functions
2286
2287 sub git_get_heads_list {
2288         my $limit = shift;
2289         my @headslist;
2290
2291         open my $fd, '-|', git_cmd(), 'for-each-ref',
2292                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2293                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2294                 'refs/heads'
2295                 or return;
2296         while (my $line = <$fd>) {
2297                 my %ref_item;
2298
2299                 chomp $line;
2300                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2301                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2302                 my ($committer, $epoch, $tz) =
2303                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2304                 $ref_item{'fullname'}  = $name;
2305                 $name =~ s!^refs/heads/!!;
2306
2307                 $ref_item{'name'}  = $name;
2308                 $ref_item{'id'}    = $hash;
2309                 $ref_item{'title'} = $title || '(no commit message)';
2310                 $ref_item{'epoch'} = $epoch;
2311                 if ($epoch) {
2312                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2313                 } else {
2314                         $ref_item{'age'} = "unknown";
2315                 }
2316
2317                 push @headslist, \%ref_item;
2318         }
2319         close $fd;
2320
2321         return wantarray ? @headslist : \@headslist;
2322 }
2323
2324 sub git_get_tags_list {
2325         my $limit = shift;
2326         my @tagslist;
2327
2328         open my $fd, '-|', git_cmd(), 'for-each-ref',
2329                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2330                 '--format=%(objectname) %(objecttype) %(refname) '.
2331                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2332                 'refs/tags'
2333                 or return;
2334         while (my $line = <$fd>) {
2335                 my %ref_item;
2336
2337                 chomp $line;
2338                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2339                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2340                 my ($creator, $epoch, $tz) =
2341                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2342                 $ref_item{'fullname'} = $name;
2343                 $name =~ s!^refs/tags/!!;
2344
2345                 $ref_item{'type'} = $type;
2346                 $ref_item{'id'} = $id;
2347                 $ref_item{'name'} = $name;
2348                 if ($type eq "tag") {
2349                         $ref_item{'subject'} = $title;
2350                         $ref_item{'reftype'} = $reftype;
2351                         $ref_item{'refid'}   = $refid;
2352                 } else {
2353                         $ref_item{'reftype'} = $type;
2354                         $ref_item{'refid'}   = $id;
2355                 }
2356
2357                 if ($type eq "tag" || $type eq "commit") {
2358                         $ref_item{'epoch'} = $epoch;
2359                         if ($epoch) {
2360                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2361                         } else {
2362                                 $ref_item{'age'} = "unknown";
2363                         }
2364                 }
2365
2366                 push @tagslist, \%ref_item;
2367         }
2368         close $fd;
2369
2370         return wantarray ? @tagslist : \@tagslist;
2371 }
2372
2373 ## ----------------------------------------------------------------------
2374 ## filesystem-related functions
2375
2376 sub get_file_owner {
2377         my $path = shift;
2378
2379         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2380         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2381         if (!defined $gcos) {
2382                 return undef;
2383         }
2384         my $owner = $gcos;
2385         $owner =~ s/[,;].*$//;
2386         return to_utf8($owner);
2387 }
2388
2389 ## ......................................................................
2390 ## mimetype related functions
2391
2392 sub mimetype_guess_file {
2393         my $filename = shift;
2394         my $mimemap = shift;
2395         -r $mimemap or return undef;
2396
2397         my %mimemap;
2398         open(MIME, $mimemap) or return undef;
2399         while (<MIME>) {
2400                 next if m/^#/; # skip comments
2401                 my ($mime, $exts) = split(/\t+/);
2402                 if (defined $exts) {
2403                         my @exts = split(/\s+/, $exts);
2404                         foreach my $ext (@exts) {
2405                                 $mimemap{$ext} = $mime;
2406                         }
2407                 }
2408         }
2409         close(MIME);
2410
2411         $filename =~ /\.([^.]*)$/;
2412         return $mimemap{$1};
2413 }
2414
2415 sub mimetype_guess {
2416         my $filename = shift;
2417         my $mime;
2418         $filename =~ /\./ or return undef;
2419
2420         if ($mimetypes_file) {
2421                 my $file = $mimetypes_file;
2422                 if ($file !~ m!^/!) { # if it is relative path
2423                         # it is relative to project
2424                         $file = "$projectroot/$project/$file";
2425                 }
2426                 $mime = mimetype_guess_file($filename, $file);
2427         }
2428         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2429         return $mime;
2430 }
2431
2432 sub blob_mimetype {
2433         my $fd = shift;
2434         my $filename = shift;
2435
2436         if ($filename) {
2437                 my $mime = mimetype_guess($filename);
2438                 $mime and return $mime;
2439         }
2440
2441         # just in case
2442         return $default_blob_plain_mimetype unless $fd;
2443
2444         if (-T $fd) {
2445                 return 'text/plain';
2446         } elsif (! $filename) {
2447                 return 'application/octet-stream';
2448         } elsif ($filename =~ m/\.png$/i) {
2449                 return 'image/png';
2450         } elsif ($filename =~ m/\.gif$/i) {
2451                 return 'image/gif';
2452         } elsif ($filename =~ m/\.jpe?g$/i) {
2453                 return 'image/jpeg';
2454         } else {
2455                 return 'application/octet-stream';
2456         }
2457 }
2458
2459 sub blob_contenttype {
2460         my ($fd, $file_name, $type) = @_;
2461
2462         $type ||= blob_mimetype($fd, $file_name);
2463         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2464                 $type .= "; charset=$default_text_plain_charset";
2465         }
2466
2467         return $type;
2468 }
2469
2470 ## ======================================================================
2471 ## functions printing HTML: header, footer, error page
2472
2473 sub git_header_html {
2474         my $status = shift || "200 OK";
2475         my $expires = shift;
2476
2477         my $title = "$site_name";
2478         if (defined $project) {
2479                 $title .= " - " . to_utf8($project);
2480                 if (defined $action) {
2481                         $title .= "/$action";
2482                         if (defined $file_name) {
2483                                 $title .= " - " . esc_path($file_name);
2484                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2485                                         $title .= "/";
2486                                 }
2487                         }
2488                 }
2489         }
2490         my $content_type;
2491         # require explicit support from the UA if we are to send the page as
2492         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2493         # we have to do this because MSIE sometimes globs '*/*', pretending to
2494         # support xhtml+xml but choking when it gets what it asked for.
2495         if (defined $cgi->http('HTTP_ACCEPT') &&
2496             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2497             $cgi->Accept('application/xhtml+xml') != 0) {
2498                 $content_type = 'application/xhtml+xml';
2499         } else {
2500                 $content_type = 'text/html';
2501         }
2502         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2503                            -status=> $status, -expires => $expires);
2504         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2505         print <<EOF;
2506 <?xml version="1.0" encoding="utf-8"?>
2507 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2508 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2509 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2510 <!-- git core binaries version $git_version -->
2511 <head>
2512 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2513 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2514 <meta name="robots" content="index, nofollow"/>
2515 <title>$title</title>
2516 EOF
2517 # print out each stylesheet that exist
2518         if (defined $stylesheet) {
2519 #provides backwards capability for those people who define style sheet in a config file
2520                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2521         } else {
2522                 foreach my $stylesheet (@stylesheets) {
2523                         next unless $stylesheet;
2524                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2525                 }
2526         }
2527         if (defined $project) {
2528                 my %href_params = get_feed_info();
2529                 if (!exists $href_params{'-title'}) {
2530                         $href_params{'-title'} = 'log';
2531                 }
2532
2533                 foreach my $format qw(RSS Atom) {
2534                         my $type = lc($format);
2535                         my %link_attr = (
2536                                 '-rel' => 'alternate',
2537                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2538                                 '-type' => "application/$type+xml"
2539                         );
2540
2541                         $href_params{'action'} = $type;
2542                         $link_attr{'-href'} = href(%href_params);
2543                         print "<link ".
2544                               "rel=\"$link_attr{'-rel'}\" ".
2545                               "title=\"$link_attr{'-title'}\" ".
2546                               "href=\"$link_attr{'-href'}\" ".
2547                               "type=\"$link_attr{'-type'}\" ".
2548                               "/>\n";
2549
2550                         $href_params{'extra_options'} = '--no-merges';
2551                         $link_attr{'-href'} = href(%href_params);
2552                         $link_attr{'-title'} .= ' (no merges)';
2553                         print "<link ".
2554                               "rel=\"$link_attr{'-rel'}\" ".
2555                               "title=\"$link_attr{'-title'}\" ".
2556                               "href=\"$link_attr{'-href'}\" ".
2557                               "type=\"$link_attr{'-type'}\" ".
2558                               "/>\n";
2559                 }
2560
2561         } else {
2562                 printf('<link rel="alternate" title="%s projects list" '.
2563                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2564                        $site_name, href(project=>undef, action=>"project_index"));
2565                 printf('<link rel="alternate" title="%s projects feeds" '.
2566                        'href="%s" type="text/x-opml" />'."\n",
2567                        $site_name, href(project=>undef, action=>"opml"));
2568         }
2569         if (defined $favicon) {
2570                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2571         }
2572
2573         print "</head>\n" .
2574               "<body>\n";
2575
2576         if (-f $site_header) {
2577                 open (my $fd, $site_header);
2578                 print <$fd>;
2579                 close $fd;
2580         }
2581
2582         print "<div class=\"page_header\">\n" .
2583               $cgi->a({-href => esc_url($logo_url),
2584                        -title => $logo_label},
2585                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2586         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2587         if (defined $project) {
2588                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2589                 if (defined $action) {
2590                         print " / $action";
2591                 }
2592                 print "\n";
2593         }
2594         print "</div>\n";
2595
2596         my ($have_search) = gitweb_check_feature('search');
2597         if (defined $project && $have_search) {
2598                 if (!defined $searchtext) {
2599                         $searchtext = "";
2600                 }
2601                 my $search_hash;
2602                 if (defined $hash_base) {
2603                         $search_hash = $hash_base;
2604                 } elsif (defined $hash) {
2605                         $search_hash = $hash;
2606                 } else {
2607                         $search_hash = "HEAD";
2608                 }
2609                 my $action = $my_uri;
2610                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2611                 if ($use_pathinfo) {
2612                         $action .= "/".esc_url($project);
2613                 }
2614                 print $cgi->startform(-method => "get", -action => $action) .
2615                       "<div class=\"search\">\n" .
2616                       (!$use_pathinfo &&
2617                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2618                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2619                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2620                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2621                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2622                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2623                       " search:\n",
2624                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2625                       "<span title=\"Extended regular expression\">" .
2626                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2627                                      -checked => $search_use_regexp) .
2628                       "</span>" .
2629                       "</div>" .
2630                       $cgi->end_form() . "\n";
2631         }
2632 }
2633
2634 sub git_footer_html {
2635         my $feed_class = 'rss_logo';
2636
2637         print "<div class=\"page_footer\">\n";
2638         if (defined $project) {
2639                 my $descr = git_get_project_description($project);
2640                 if (defined $descr) {
2641                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2642                 }
2643
2644                 my %href_params = get_feed_info();
2645                 if (!%href_params) {
2646                         $feed_class .= ' generic';
2647                 }
2648                 $href_params{'-title'} ||= 'log';
2649
2650                 foreach my $format qw(RSS Atom) {
2651                         $href_params{'action'} = lc($format);
2652                         print $cgi->a({-href => href(%href_params),
2653                                       -title => "$href_params{'-title'} $format feed",
2654                                       -class => $feed_class}, $format)."\n";
2655                 }
2656
2657         } else {
2658                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2659                               -class => $feed_class}, "OPML") . " ";
2660                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2661                               -class => $feed_class}, "TXT") . "\n";
2662         }
2663         print "</div>\n"; # class="page_footer"
2664
2665         if (-f $site_footer) {
2666                 open (my $fd, $site_footer);
2667                 print <$fd>;
2668                 close $fd;
2669         }
2670
2671         print "</body>\n" .
2672               "</html>";
2673 }
2674
2675 # die_error(<http_status_code>, <error_message>)
2676 # Example: die_error(404, 'Hash not found')
2677 # By convention, use the following status codes (as defined in RFC 2616):
2678 # 400: Invalid or missing CGI parameters, or
2679 #      requested object exists but has wrong type.
2680 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2681 #      this server or project.
2682 # 404: Requested object/revision/project doesn't exist.
2683 # 500: The server isn't configured properly, or
2684 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2685 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2686 sub die_error {
2687         my $status = shift || 500;
2688         my $error = shift || "Internal server error";
2689
2690         my %http_responses = (400 => '400 Bad Request',
2691                               403 => '403 Forbidden',
2692                               404 => '404 Not Found',
2693                               500 => '500 Internal Server Error');
2694         git_header_html($http_responses{$status});
2695         print <<EOF;
2696 <div class="page_body">
2697 <br /><br />
2698 $status - $error
2699 <br />
2700 </div>
2701 EOF
2702         git_footer_html();
2703         exit;
2704 }
2705
2706 ## ----------------------------------------------------------------------
2707 ## functions printing or outputting HTML: navigation
2708
2709 sub git_print_page_nav {
2710         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2711         $extra = '' if !defined $extra; # pager or formats
2712
2713         my @navs = qw(summary shortlog log commit commitdiff tree);
2714         if ($suppress) {
2715                 @navs = grep { $_ ne $suppress } @navs;
2716         }
2717
2718         my %arg = map { $_ => {action=>$_} } @navs;
2719         if (defined $head) {
2720                 for (qw(commit commitdiff)) {
2721                         $arg{$_}{'hash'} = $head;
2722                 }
2723                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2724                         for (qw(shortlog log)) {
2725                                 $arg{$_}{'hash'} = $head;
2726                         }
2727                 }
2728         }
2729         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2730         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2731
2732         print "<div class=\"page_nav\">\n" .
2733                 (join " | ",
2734                  map { $_ eq $current ?
2735                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2736                  } @navs);
2737         print "<br/>\n$extra<br/>\n" .
2738               "</div>\n";
2739 }
2740
2741 sub format_paging_nav {
2742         my ($action, $hash, $head, $page, $has_next_link) = @_;
2743         my $paging_nav;
2744
2745
2746         if ($hash ne $head || $page) {
2747                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2748         } else {
2749                 $paging_nav .= "HEAD";
2750         }
2751
2752         if ($page > 0) {
2753                 $paging_nav .= " &sdot; " .
2754                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2755                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2756         } else {
2757                 $paging_nav .= " &sdot; prev";
2758         }
2759
2760         if ($has_next_link) {
2761                 $paging_nav .= " &sdot; " .
2762                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2763                                  -accesskey => "n", -title => "Alt-n"}, "next");
2764         } else {
2765                 $paging_nav .= " &sdot; next";
2766         }
2767
2768         return $paging_nav;
2769 }
2770
2771 ## ......................................................................
2772 ## functions printing or outputting HTML: div
2773
2774 sub git_print_header_div {
2775         my ($action, $title, $hash, $hash_base) = @_;
2776         my %args = ();
2777
2778         $args{'action'} = $action;
2779         $args{'hash'} = $hash if $hash;
2780         $args{'hash_base'} = $hash_base if $hash_base;
2781
2782         print "<div class=\"header\">\n" .
2783               $cgi->a({-href => href(%args), -class => "title"},
2784               $title ? $title : $action) .
2785               "\n</div>\n";
2786 }
2787
2788 #sub git_print_authorship (\%) {
2789 sub git_print_authorship {
2790         my $co = shift;
2791
2792         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2793         print "<div class=\"author_date\">" .
2794               esc_html($co->{'author_name'}) .
2795               " [$ad{'rfc2822'}";
2796         if ($ad{'hour_local'} < 6) {
2797                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2798                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2799         } else {
2800                 printf(" (%02d:%02d %s)",
2801                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2802         }
2803         print "]</div>\n";
2804 }
2805
2806 sub git_print_page_path {
2807         my $name = shift;
2808         my $type = shift;
2809         my $hb = shift;
2810
2811
2812         print "<div class=\"page_path\">";
2813         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2814                       -title => 'tree root'}, to_utf8("[$project]"));
2815         print " / ";
2816         if (defined $name) {
2817                 my @dirname = split '/', $name;
2818                 my $basename = pop @dirname;
2819                 my $fullname = '';
2820
2821                 foreach my $dir (@dirname) {
2822                         $fullname .= ($fullname ? '/' : '') . $dir;
2823                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2824                                                      hash_base=>$hb),
2825                                       -title => $fullname}, esc_path($dir));
2826                         print " / ";
2827                 }
2828                 if (defined $type && $type eq 'blob') {
2829                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2830                                                      hash_base=>$hb),
2831                                       -title => $name}, esc_path($basename));
2832                 } elsif (defined $type && $type eq 'tree') {
2833                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2834                                                      hash_base=>$hb),
2835                                       -title => $name}, esc_path($basename));
2836                         print " / ";
2837                 } else {
2838                         print esc_path($basename);
2839                 }
2840         }
2841         print "<br/></div>\n";
2842 }
2843
2844 # sub git_print_log (\@;%) {
2845 sub git_print_log ($;%) {
2846         my $log = shift;
2847         my %opts = @_;
2848
2849         if ($opts{'-remove_title'}) {
2850                 # remove title, i.e. first line of log
2851                 shift @$log;
2852         }
2853         # remove leading empty lines
2854         while (defined $log->[0] && $log->[0] eq "") {
2855                 shift @$log;
2856         }
2857
2858         # print log
2859         my $signoff = 0;
2860         my $empty = 0;
2861         foreach my $line (@$log) {
2862                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2863                         $signoff = 1;
2864                         $empty = 0;
2865                         if (! $opts{'-remove_signoff'}) {
2866                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2867                                 next;
2868                         } else {
2869                                 # remove signoff lines
2870                                 next;
2871                         }
2872                 } else {
2873                         $signoff = 0;
2874                 }
2875
2876                 # print only one empty line
2877                 # do not print empty line after signoff
2878                 if ($line eq "") {
2879                         next if ($empty || $signoff);
2880                         $empty = 1;
2881                 } else {
2882                         $empty = 0;
2883                 }
2884
2885                 print format_log_line_html($line) . "<br/>\n";
2886         }
2887
2888         if ($opts{'-final_empty_line'}) {
2889                 # end with single empty line
2890                 print "<br/>\n" unless $empty;
2891         }
2892 }
2893
2894 # return link target (what link points to)
2895 sub git_get_link_target {
2896         my $hash = shift;
2897         my $link_target;
2898
2899         # read link
2900         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2901                 or return;
2902         {
2903                 local $/;
2904                 $link_target = <$fd>;
2905         }
2906         close $fd
2907                 or return;
2908
2909         return $link_target;
2910 }
2911
2912 # given link target, and the directory (basedir) the link is in,
2913 # return target of link relative to top directory (top tree);
2914 # return undef if it is not possible (including absolute links).
2915 sub normalize_link_target {
2916         my ($link_target, $basedir, $hash_base) = @_;
2917
2918         # we can normalize symlink target only if $hash_base is provided
2919         return unless $hash_base;
2920
2921         # absolute symlinks (beginning with '/') cannot be normalized
2922         return if (substr($link_target, 0, 1) eq '/');
2923
2924         # normalize link target to path from top (root) tree (dir)
2925         my $path;
2926         if ($basedir) {
2927                 $path = $basedir . '/' . $link_target;
2928         } else {
2929                 # we are in top (root) tree (dir)
2930                 $path = $link_target;
2931         }
2932
2933         # remove //, /./, and /../
2934         my @path_parts;
2935         foreach my $part (split('/', $path)) {
2936                 # discard '.' and ''
2937                 next if (!$part || $part eq '.');
2938                 # handle '..'
2939                 if ($part eq '..') {
2940                         if (@path_parts) {
2941                                 pop @path_parts;
2942                         } else {
2943                                 # link leads outside repository (outside top dir)
2944                                 return;
2945                         }
2946                 } else {
2947                         push @path_parts, $part;
2948                 }
2949         }
2950         $path = join('/', @path_parts);
2951
2952         return $path;
2953 }
2954
2955 # print tree entry (row of git_tree), but without encompassing <tr> element
2956 sub git_print_tree_entry {
2957         my ($t, $basedir, $hash_base, $have_blame) = @_;
2958
2959         my %base_key = ();
2960         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2961
2962         # The format of a table row is: mode list link.  Where mode is
2963         # the mode of the entry, list is the name of the entry, an href,
2964         # and link is the action links of the entry.
2965
2966         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2967         if ($t->{'type'} eq "blob") {
2968                 print "<td class=\"list\">" .
2969                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2970                                                file_name=>"$basedir$t->{'name'}", %base_key),
2971                                 -class => "list"}, esc_path($t->{'name'}));
2972                 if (S_ISLNK(oct $t->{'mode'})) {
2973                         my $link_target = git_get_link_target($t->{'hash'});
2974                         if ($link_target) {
2975                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2976                                 if (defined $norm_target) {
2977                                         print " -> " .
2978                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2979                                                                      file_name=>$norm_target),
2980                                                        -title => $norm_target}, esc_path($link_target));
2981                                 } else {
2982                                         print " -> " . esc_path($link_target);
2983                                 }
2984                         }
2985                 }
2986                 print "</td>\n";
2987                 print "<td class=\"link\">";
2988                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2989                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2990                               "blob");
2991                 if ($have_blame) {
2992                         print " | " .
2993                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2994                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2995                                       "blame");
2996                 }
2997                 if (defined $hash_base) {
2998                         print " | " .
2999                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3000                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3001                                       "history");
3002                 }
3003                 print " | " .
3004                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3005                                                file_name=>"$basedir$t->{'name'}")},
3006                                 "raw");
3007                 print "</td>\n";
3008
3009         } elsif ($t->{'type'} eq "tree") {
3010                 print "<td class=\"list\">";
3011                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3012                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3013                               esc_path($t->{'name'}));
3014                 print "</td>\n";
3015                 print "<td class=\"link\">";
3016                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3017                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3018                               "tree");
3019                 if (defined $hash_base) {
3020                         print " | " .
3021                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3022                                                      file_name=>"$basedir$t->{'name'}")},
3023                                       "history");
3024                 }
3025                 print "</td>\n";
3026         } else {
3027                 # unknown object: we can only present history for it
3028                 # (this includes 'commit' object, i.e. submodule support)
3029                 print "<td class=\"list\">" .
3030                       esc_path($t->{'name'}) .
3031                       "</td>\n";
3032                 print "<td class=\"link\">";
3033                 if (defined $hash_base) {
3034                         print $cgi->a({-href => href(action=>"history",
3035                                                      hash_base=>$hash_base,
3036                                                      file_name=>"$basedir$t->{'name'}")},
3037                                       "history");
3038                 }
3039                 print "</td>\n";
3040         }
3041 }
3042
3043 ## ......................................................................
3044 ## functions printing large fragments of HTML
3045
3046 # get pre-image filenames for merge (combined) diff
3047 sub fill_from_file_info {
3048         my ($diff, @parents) = @_;
3049
3050         $diff->{'from_file'} = [ ];
3051         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3052         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3053                 if ($diff->{'status'}[$i] eq 'R' ||
3054                     $diff->{'status'}[$i] eq 'C') {
3055                         $diff->{'from_file'}[$i] =
3056                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3057                 }
3058         }
3059
3060         return $diff;
3061 }
3062
3063 # is current raw difftree line of file deletion
3064 sub is_deleted {
3065         my $diffinfo = shift;
3066
3067         return $diffinfo->{'to_id'} eq ('0' x 40);
3068 }
3069
3070 # does patch correspond to [previous] difftree raw line
3071 # $diffinfo  - hashref of parsed raw diff format
3072 # $patchinfo - hashref of parsed patch diff format
3073 #              (the same keys as in $diffinfo)
3074 sub is_patch_split {
3075         my ($diffinfo, $patchinfo) = @_;
3076
3077         return defined $diffinfo && defined $patchinfo
3078                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3079 }
3080
3081
3082 sub git_difftree_body {
3083         my ($difftree, $hash, @parents) = @_;
3084         my ($parent) = $parents[0];
3085         my ($have_blame) = gitweb_check_feature('blame');
3086         print "<div class=\"list_head\">\n";
3087         if ($#{$difftree} > 10) {
3088                 print(($#{$difftree} + 1) . " files changed:\n");
3089         }
3090         print "</div>\n";
3091
3092         print "<table class=\"" .
3093               (@parents > 1 ? "combined " : "") .
3094               "diff_tree\">\n";
3095
3096         # header only for combined diff in 'commitdiff' view
3097         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3098         if ($has_header) {
3099                 # table header
3100                 print "<thead><tr>\n" .
3101                        "<th></th><th></th>\n"; # filename, patchN link
3102                 for (my $i = 0; $i < @parents; $i++) {
3103                         my $par = $parents[$i];
3104                         print "<th>" .
3105                               $cgi->a({-href => href(action=>"commitdiff",
3106                                                      hash=>$hash, hash_parent=>$par),
3107                                        -title => 'commitdiff to parent number ' .
3108                                                   ($i+1) . ': ' . substr($par,0,7)},
3109                                       $i+1) .
3110                               "&nbsp;</th>\n";
3111                 }
3112                 print "</tr></thead>\n<tbody>\n";
3113         }
3114
3115         my $alternate = 1;
3116         my $patchno = 0;
3117         foreach my $line (@{$difftree}) {
3118                 my $diff = parsed_difftree_line($line);
3119
3120                 if ($alternate) {
3121                         print "<tr class=\"dark\">\n";
3122                 } else {
3123                         print "<tr class=\"light\">\n";
3124                 }
3125                 $alternate ^= 1;
3126
3127                 if (exists $diff->{'nparents'}) { # combined diff
3128
3129                         fill_from_file_info($diff, @parents)
3130                                 unless exists $diff->{'from_file'};
3131
3132                         if (!is_deleted($diff)) {
3133                                 # file exists in the result (child) commit
3134                                 print "<td>" .
3135                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3136                                                              file_name=>$diff->{'to_file'},
3137                                                              hash_base=>$hash),
3138                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3139                                       "</td>\n";
3140                         } else {
3141                                 print "<td>" .
3142                                       esc_path($diff->{'to_file'}) .
3143                                       "</td>\n";
3144                         }
3145
3146                         if ($action eq 'commitdiff') {
3147                                 # link to patch
3148                                 $patchno++;
3149                                 print "<td class=\"link\">" .
3150                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3151                                       " | " .
3152                                       "</td>\n";
3153                         }
3154
3155                         my $has_history = 0;
3156                         my $not_deleted = 0;
3157                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3158                                 my $hash_parent = $parents[$i];
3159                                 my $from_hash = $diff->{'from_id'}[$i];
3160                                 my $from_path = $diff->{'from_file'}[$i];
3161                                 my $status = $diff->{'status'}[$i];
3162
3163                                 $has_history ||= ($status ne 'A');
3164                                 $not_deleted ||= ($status ne 'D');
3165
3166                                 if ($status eq 'A') {
3167                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3168                                 } elsif ($status eq 'D') {
3169                                         print "<td class=\"link\">" .
3170                                               $cgi->a({-href => href(action=>"blob",
3171                                                                      hash_base=>$hash,
3172                                                                      hash=>$from_hash,
3173                                                                      file_name=>$from_path)},
3174                                                       "blob" . ($i+1)) .
3175                                               " | </td>\n";
3176                                 } else {
3177                                         if ($diff->{'to_id'} eq $from_hash) {
3178                                                 print "<td class=\"link nochange\">";
3179                                         } else {
3180                                                 print "<td class=\"link\">";
3181                                         }
3182                                         print $cgi->a({-href => href(action=>"blobdiff",
3183                                                                      hash=>$diff->{'to_id'},
3184                                                                      hash_parent=>$from_hash,
3185                                                                      hash_base=>$hash,
3186                                                                      hash_parent_base=>$hash_parent,
3187                                                                      file_name=>$diff->{'to_file'},
3188                                                                      file_parent=>$from_path)},
3189                                                       "diff" . ($i+1)) .
3190                                               " | </td>\n";
3191                                 }
3192                         }
3193
3194                         print "<td class=\"link\">";
3195                         if ($not_deleted) {
3196                                 print $cgi->a({-href => href(action=>"blob",
3197                                                              hash=>$diff->{'to_id'},
3198                                                              file_name=>$diff->{'to_file'},
3199                                                              hash_base=>$hash)},
3200                                               "blob");
3201                                 print " | " if ($has_history);
3202                         }
3203                         if ($has_history) {
3204                                 print $cgi->a({-href => href(action=>"history",
3205                                                              file_name=>$diff->{'to_file'},
3206                                                              hash_base=>$hash)},
3207                                               "history");
3208                         }
3209                         print "</td>\n";
3210
3211                         print "</tr>\n";
3212                         next; # instead of 'else' clause, to avoid extra indent
3213                 }
3214                 # else ordinary diff
3215
3216                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3217                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3218                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3219                         $to_mode_oct = oct $diff->{'to_mode'};
3220                         if (S_ISREG($to_mode_oct)) { # only for regular file
3221                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3222                         }
3223                         $to_file_type = file_type($diff->{'to_mode'});
3224                 }
3225                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3226                         $from_mode_oct = oct $diff->{'from_mode'};
3227                         if (S_ISREG($to_mode_oct)) { # only for regular file
3228                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3229                         }
3230                         $from_file_type = file_type($diff->{'from_mode'});
3231                 }
3232
3233                 if ($diff->{'status'} eq "A") { # created
3234                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3235                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3236                         $mode_chng   .= "]</span>";
3237                         print "<td>";
3238                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3239                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3240                                       -class => "list"}, esc_path($diff->{'file'}));
3241                         print "</td>\n";
3242                         print "<td>$mode_chng</td>\n";
3243                         print "<td class=\"link\">";
3244                         if ($action eq 'commitdiff') {
3245                                 # link to patch
3246                                 $patchno++;
3247                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3248                                 print " | ";
3249                         }
3250                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3251                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3252                                       "blob");
3253                         print "</td>\n";
3254
3255                 } elsif ($diff->{'status'} eq "D") { # deleted
3256                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3257                         print "<td>";
3258                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3259                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3260                                        -class => "list"}, esc_path($diff->{'file'}));
3261                         print "</td>\n";
3262                         print "<td>$mode_chng</td>\n";
3263                         print "<td class=\"link\">";
3264                         if ($action eq 'commitdiff') {
3265                                 # link to patch
3266                                 $patchno++;
3267                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3268                                 print " | ";
3269                         }
3270                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3271                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3272                                       "blob") . " | ";
3273                         if ($have_blame) {
3274                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3275                                                              file_name=>$diff->{'file'})},
3276                                               "blame") . " | ";
3277                         }
3278                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3279                                                      file_name=>$diff->{'file'})},
3280                                       "history");
3281                         print "</td>\n";
3282
3283                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3284                         my $mode_chnge = "";
3285                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3286                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3287                                 if ($from_file_type ne $to_file_type) {
3288                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3289                                 }
3290                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3291                                         if ($from_mode_str && $to_mode_str) {
3292                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3293                                         } elsif ($to_mode_str) {
3294                                                 $mode_chnge .= " mode: $to_mode_str";
3295                                         }
3296                                 }
3297                                 $mode_chnge .= "]</span>\n";
3298                         }
3299                         print "<td>";
3300                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3301                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3302                                       -class => "list"}, esc_path($diff->{'file'}));
3303                         print "</td>\n";
3304                         print "<td>$mode_chnge</td>\n";
3305                         print "<td class=\"link\">";
3306                         if ($action eq 'commitdiff') {
3307                                 # link to patch
3308                                 $patchno++;
3309                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3310                                       " | ";
3311                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3312                                 # "commit" view and modified file (not onlu mode changed)
3313                                 print $cgi->a({-href => href(action=>"blobdiff",
3314                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3315                                                              hash_base=>$hash, hash_parent_base=>$parent,
3316                                                              file_name=>$diff->{'file'})},
3317                                               "diff") .
3318                                       " | ";
3319                         }
3320                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3321                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3322                                        "blob") . " | ";
3323                         if ($have_blame) {
3324                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3325                                                              file_name=>$diff->{'file'})},
3326                                               "blame") . " | ";
3327                         }
3328                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3329                                                      file_name=>$diff->{'file'})},
3330                                       "history");
3331                         print "</td>\n";
3332
3333                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3334                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3335                         my $nstatus = $status_name{$diff->{'status'}};
3336                         my $mode_chng = "";
3337                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3338                                 # mode also for directories, so we cannot use $to_mode_str
3339                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3340                         }
3341                         print "<td>" .
3342                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3343                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3344                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3345                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3346                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3347                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3348                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3349                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3350                               "<td class=\"link\">";
3351                         if ($action eq 'commitdiff') {
3352                                 # link to patch
3353                                 $patchno++;
3354                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3355                                       " | ";
3356                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3357                                 # "commit" view and modified file (not only pure rename or copy)
3358                                 print $cgi->a({-href => href(action=>"blobdiff",
3359                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3360                                                              hash_base=>$hash, hash_parent_base=>$parent,
3361                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3362                                               "diff") .
3363                                       " | ";
3364                         }
3365                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3366                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3367                                       "blob") . " | ";
3368                         if ($have_blame) {
3369                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3370                                                              file_name=>$diff->{'to_file'})},
3371                                               "blame") . " | ";
3372                         }
3373                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3374                                                     file_name=>$diff->{'to_file'})},
3375                                       "history");
3376                         print "</td>\n";
3377
3378                 } # we should not encounter Unmerged (U) or Unknown (X) status
3379                 print "</tr>\n";
3380         }
3381         print "</tbody>" if $has_header;
3382         print "</table>\n";
3383 }
3384
3385 sub git_patchset_body {
3386         my ($fd, $difftree, $hash, @hash_parents) = @_;
3387         my ($hash_parent) = $hash_parents[0];
3388
3389         my $is_combined = (@hash_parents > 1);
3390         my $patch_idx = 0;
3391         my $patch_number = 0;
3392         my $patch_line;
3393         my $diffinfo;
3394         my $to_name;
3395         my (%from, %to);
3396
3397         print "<div class=\"patchset\">\n";
3398
3399         # skip to first patch
3400         while ($patch_line = <$fd>) {
3401                 chomp $patch_line;
3402
3403                 last if ($patch_line =~ m/^diff /);
3404         }
3405
3406  PATCH:
3407         while ($patch_line) {
3408
3409                 # parse "git diff" header line
3410                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3411                         # $1 is from_name, which we do not use
3412                         $to_name = unquote($2);
3413                         $to_name =~ s!^b/!!;
3414                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3415                         # $1 is 'cc' or 'combined', which we do not use
3416                         $to_name = unquote($2);
3417                 } else {
3418                         $to_name = undef;
3419                 }
3420
3421                 # check if current patch belong to current raw line
3422                 # and parse raw git-diff line if needed
3423                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3424                         # this is continuation of a split patch
3425                         print "<div class=\"patch cont\">\n";
3426                 } else {
3427                         # advance raw git-diff output if needed
3428                         $patch_idx++ if defined $diffinfo;
3429
3430                         # read and prepare patch information
3431                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3432
3433                         # compact combined diff output can have some patches skipped
3434                         # find which patch (using pathname of result) we are at now;
3435                         if ($is_combined) {
3436                                 while ($to_name ne $diffinfo->{'to_file'}) {
3437                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3438                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3439                                               "</div>\n";  # class="patch"
3440
3441                                         $patch_idx++;
3442                                         $patch_number++;
3443
3444                                         last if $patch_idx > $#$difftree;
3445                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3446                                 }
3447                         }
3448
3449                         # modifies %from, %to hashes
3450                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3451
3452                         # this is first patch for raw difftree line with $patch_idx index
3453                         # we index @$difftree array from 0, but number patches from 1
3454                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3455                 }
3456
3457                 # git diff header
3458                 #assert($patch_line =~ m/^diff /) if DEBUG;
3459                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3460                 $patch_number++;
3461                 # print "git diff" header
3462                 print format_git_diff_header_line($patch_line, $diffinfo,
3463                                                   \%from, \%to);
3464
3465                 # print extended diff header
3466                 print "<div class=\"diff extended_header\">\n";
3467         EXTENDED_HEADER:
3468                 while ($patch_line = <$fd>) {
3469                         chomp $patch_line;
3470
3471                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3472
3473                         print format_extended_diff_header_line($patch_line, $diffinfo,
3474                                                                \%from, \%to);
3475                 }
3476                 print "</div>\n"; # class="diff extended_header"
3477
3478                 # from-file/to-file diff header
3479                 if (! $patch_line) {
3480                         print "</div>\n"; # class="patch"
3481                         last PATCH;
3482                 }
3483                 next PATCH if ($patch_line =~ m/^diff /);
3484                 #assert($patch_line =~ m/^---/) if DEBUG;
3485
3486                 my $last_patch_line = $patch_line;
3487                 $patch_line = <$fd>;
3488                 chomp $patch_line;
3489                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3490
3491                 print format_diff_from_to_header($last_patch_line, $patch_line,
3492                                                  $diffinfo, \%from, \%to,
3493                                                  @hash_parents);
3494
3495                 # the patch itself
3496         LINE:
3497                 while ($patch_line = <$fd>) {
3498                         chomp $patch_line;
3499
3500                         next PATCH if ($patch_line =~ m/^diff /);
3501
3502                         print format_diff_line($patch_line, \%from, \%to);
3503                 }
3504
3505         } continue {
3506                 print "</div>\n"; # class="patch"
3507         }
3508
3509         # for compact combined (--cc) format, with chunk and patch simpliciaction
3510         # patchset might be empty, but there might be unprocessed raw lines
3511         for (++$patch_idx if $patch_number > 0;
3512              $patch_idx < @$difftree;
3513              ++$patch_idx) {
3514                 # read and prepare patch information
3515                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3516
3517                 # generate anchor for "patch" links in difftree / whatchanged part
3518                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3519                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3520                       "</div>\n";  # class="patch"
3521
3522                 $patch_number++;
3523         }
3524
3525         if ($patch_number == 0) {
3526                 if (@hash_parents > 1) {
3527                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3528                 } else {
3529                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3530                 }
3531         }
3532
3533         print "</div>\n"; # class="patchset"
3534 }
3535
3536 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3537
3538 sub git_project_list_body {
3539         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3540
3541         my ($check_forks) = gitweb_check_feature('forks');
3542
3543         my @projects;
3544         foreach my $pr (@$projlist) {
3545                 my (@aa) = git_get_last_activity($pr->{'path'});
3546                 unless (@aa) {
3547                         next;
3548                 }
3549                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3550                 if (!defined $pr->{'descr'}) {
3551                         my $descr = git_get_project_description($pr->{'path'}) || "";
3552                         $pr->{'descr_long'} = to_utf8($descr);
3553                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3554                 }
3555                 if (!defined $pr->{'owner'}) {
3556                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3557                 }
3558                 if ($check_forks) {
3559                         my $pname = $pr->{'path'};
3560                         if (($pname =~ s/\.git$//) &&
3561                             ($pname !~ /\/$/) &&
3562                             (-d "$projectroot/$pname")) {
3563                                 $pr->{'forks'} = "-d $projectroot/$pname";
3564                         }
3565                         else {
3566                                 $pr->{'forks'} = 0;
3567                         }
3568                 }
3569                 push @projects, $pr;
3570         }
3571
3572         $order ||= $default_projects_order;
3573         $from = 0 unless defined $from;
3574         $to = $#projects if (!defined $to || $#projects < $to);
3575
3576         print "<table class=\"project_list\">\n";
3577         unless ($no_header) {
3578                 print "<tr>\n";
3579                 if ($check_forks) {
3580                         print "<th></th>\n";
3581                 }
3582                 if ($order eq "project") {
3583                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3584                         print "<th>Project</th>\n";
3585                 } else {
3586                         print "<th>" .
3587                               $cgi->a({-href => href(project=>undef, order=>'project'),
3588                                        -class => "header"}, "Project") .
3589                               "</th>\n";
3590                 }
3591                 if ($order eq "descr") {
3592                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3593                         print "<th>Description</th>\n";
3594                 } else {
3595                         print "<th>" .
3596                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3597                                        -class => "header"}, "Description") .
3598                               "</th>\n";
3599                 }
3600                 if ($order eq "owner") {
3601                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3602                         print "<th>Owner</th>\n";
3603                 } else {
3604                         print "<th>" .
3605                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3606                                        -class => "header"}, "Owner") .
3607                               "</th>\n";
3608                 }
3609                 if ($order eq "age") {
3610                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3611                         print "<th>Last Change</th>\n";
3612                 } else {
3613                         print "<th>" .
3614                               $cgi->a({-href => href(project=>undef, order=>'age'),
3615                                        -class => "header"}, "Last Change") .
3616                               "</th>\n";
3617                 }
3618                 print "<th></th>\n" .
3619                       "</tr>\n";
3620         }
3621         my $alternate = 1;
3622         for (my $i = $from; $i <= $to; $i++) {
3623                 my $pr = $projects[$i];
3624                 if ($alternate) {
3625                         print "<tr class=\"dark\">\n";
3626                 } else {
3627                         print "<tr class=\"light\">\n";
3628                 }
3629                 $alternate ^= 1;
3630                 if ($check_forks) {
3631                         print "<td>";
3632                         if ($pr->{'forks'}) {
3633                                 print "<!-- $pr->{'forks'} -->\n";
3634                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3635                         }
3636                         print "</td>\n";
3637                 }
3638                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3639                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3640                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3641                                         -class => "list", -title => $pr->{'descr_long'}},
3642                                         esc_html($pr->{'descr'})) . "</td>\n" .
3643                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3644                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3645                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3646                       "<td class=\"link\">" .
3647                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3648                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3649                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3650                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3651                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3652                       "</td>\n" .
3653                       "</tr>\n";
3654         }
3655         if (defined $extra) {
3656                 print "<tr>\n";
3657                 if ($check_forks) {
3658                         print "<td></td>\n";
3659                 }
3660                 print "<td colspan=\"5\">$extra</td>\n" .
3661                       "</tr>\n";
3662         }
3663         print "</table>\n";
3664 }
3665
3666 sub git_shortlog_body {
3667         # uses global variable $project
3668         my ($commitlist, $from, $to, $refs, $extra) = @_;
3669
3670         $from = 0 unless defined $from;
3671         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3672
3673         print "<table class=\"shortlog\">\n";
3674         my $alternate = 1;
3675         for (my $i = $from; $i <= $to; $i++) {
3676                 my %co = %{$commitlist->[$i]};
3677                 my $commit = $co{'id'};
3678                 my $ref = format_ref_marker($refs, $commit);
3679                 if ($alternate) {
3680                         print "<tr class=\"dark\">\n";
3681                 } else {
3682                         print "<tr class=\"light\">\n";
3683                 }
3684                 $alternate ^= 1;
3685                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3686                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3687                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3688                       "<td><i>" . $author . "</i></td>\n" .
3689                       "<td>";
3690                 print format_subject_html($co{'title'}, $co{'title_short'},
3691                                           href(action=>"commit", hash=>$commit), $ref);
3692                 print "</td>\n" .
3693                       "<td class=\"link\">" .
3694                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3695                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3696                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3697                 my $snapshot_links = format_snapshot_links($commit);
3698                 if (defined $snapshot_links) {
3699                         print " | " . $snapshot_links;
3700                 }
3701                 print "</td>\n" .
3702                       "</tr>\n";
3703         }
3704         if (defined $extra) {
3705                 print "<tr>\n" .
3706                       "<td colspan=\"4\">$extra</td>\n" .
3707                       "</tr>\n";
3708         }
3709         print "</table>\n";
3710 }
3711
3712 sub git_history_body {
3713         # Warning: assumes constant type (blob or tree) during history
3714         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3715
3716         $from = 0 unless defined $from;
3717         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3718
3719         print "<table class=\"history\">\n";
3720         my $alternate = 1;
3721         for (my $i = $from; $i <= $to; $i++) {
3722                 my %co = %{$commitlist->[$i]};
3723                 if (!%co) {
3724                         next;
3725                 }
3726                 my $commit = $co{'id'};
3727
3728                 my $ref = format_ref_marker($refs, $commit);
3729
3730                 if ($alternate) {
3731                         print "<tr class=\"dark\">\n";
3732                 } else {
3733                         print "<tr class=\"light\">\n";
3734                 }
3735                 $alternate ^= 1;
3736         # shortlog uses      chop_str($co{'author_name'}, 10)
3737                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3738                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3739                       "<td><i>" . $author . "</i></td>\n" .
3740                       "<td>";
3741                 # originally git_history used chop_str($co{'title'}, 50)
3742                 print format_subject_html($co{'title'}, $co{'title_short'},
3743                                           href(action=>"commit", hash=>$commit), $ref);
3744                 print "</td>\n" .
3745                       "<td class=\"link\">" .
3746                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3747                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3748
3749                 if ($ftype eq 'blob') {
3750                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3751                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3752                         if (defined $blob_current && defined $blob_parent &&
3753                                         $blob_current ne $blob_parent) {
3754                                 print " | " .
3755                                         $cgi->a({-href => href(action=>"blobdiff",
3756                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3757                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3758                                                                file_name=>$file_name)},
3759                                                 "diff to current");
3760                         }
3761                 }
3762                 print "</td>\n" .
3763                       "</tr>\n";
3764         }
3765         if (defined $extra) {
3766                 print "<tr>\n" .
3767                       "<td colspan=\"4\">$extra</td>\n" .
3768                       "</tr>\n";
3769         }
3770         print "</table>\n";
3771 }
3772
3773 sub git_tags_body {
3774         # uses global variable $project
3775         my ($taglist, $from, $to, $extra) = @_;
3776         $from = 0 unless defined $from;
3777         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3778
3779         print "<table class=\"tags\">\n";
3780         my $alternate = 1;
3781         for (my $i = $from; $i <= $to; $i++) {
3782                 my $entry = $taglist->[$i];
3783                 my %tag = %$entry;
3784                 my $comment = $tag{'subject'};
3785                 my $comment_short;
3786                 if (defined $comment) {
3787                         $comment_short = chop_str($comment, 30, 5);
3788                 }
3789                 if ($alternate) {
3790                         print "<tr class=\"dark\">\n";
3791                 } else {
3792                         print "<tr class=\"light\">\n";
3793                 }
3794                 $alternate ^= 1;
3795                 if (defined $tag{'age'}) {
3796                         print "<td><i>$tag{'age'}</i></td>\n";
3797                 } else {
3798                         print "<td></td>\n";
3799                 }
3800                 print "<td>" .
3801                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3802                                -class => "list name"}, esc_html($tag{'name'})) .
3803                       "</td>\n" .
3804                       "<td>";
3805                 if (defined $comment) {
3806                         print format_subject_html($comment, $comment_short,
3807                                                   href(action=>"tag", hash=>$tag{'id'}));
3808                 }
3809                 print "</td>\n" .
3810                       "<td class=\"selflink\">";
3811                 if ($tag{'type'} eq "tag") {
3812                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3813                 } else {
3814                         print "&nbsp;";
3815                 }
3816                 print "</td>\n" .
3817                       "<td class=\"link\">" . " | " .
3818                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3819                 if ($tag{'reftype'} eq "commit") {
3820                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3821                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3822                 } elsif ($tag{'reftype'} eq "blob") {
3823                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3824                 }
3825                 print "</td>\n" .
3826                       "</tr>";
3827         }
3828         if (defined $extra) {
3829                 print "<tr>\n" .
3830                       "<td colspan=\"5\">$extra</td>\n" .
3831                       "</tr>\n";
3832         }
3833         print "</table>\n";
3834 }
3835
3836 sub git_heads_body {
3837         # uses global variable $project
3838         my ($headlist, $head, $from, $to, $extra) = @_;
3839         $from = 0 unless defined $from;
3840         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3841
3842         print "<table class=\"heads\">\n";
3843         my $alternate = 1;
3844         for (my $i = $from; $i <= $to; $i++) {
3845                 my $entry = $headlist->[$i];
3846                 my %ref = %$entry;
3847                 my $curr = $ref{'id'} eq $head;
3848                 if ($alternate) {
3849                         print "<tr class=\"dark\">\n";
3850                 } else {
3851                         print "<tr class=\"light\">\n";
3852                 }
3853                 $alternate ^= 1;
3854                 print "<td><i>$ref{'age'}</i></td>\n" .
3855                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3856                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3857                                -class => "list name"},esc_html($ref{'name'})) .
3858                       "</td>\n" .
3859                       "<td class=\"link\">" .
3860                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3861                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3862                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3863                       "</td>\n" .
3864                       "</tr>";
3865         }
3866         if (defined $extra) {
3867                 print "<tr>\n" .
3868                       "<td colspan=\"3\">$extra</td>\n" .
3869                       "</tr>\n";
3870         }
3871         print "</table>\n";
3872 }
3873
3874 sub git_search_grep_body {
3875         my ($commitlist, $from, $to, $extra) = @_;
3876         $from = 0 unless defined $from;
3877         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3878
3879         print "<table class=\"commit_search\">\n";
3880         my $alternate = 1;
3881         for (my $i = $from; $i <= $to; $i++) {
3882                 my %co = %{$commitlist->[$i]};
3883                 if (!%co) {
3884                         next;
3885                 }
3886                 my $commit = $co{'id'};
3887                 if ($alternate) {
3888                         print "<tr class=\"dark\">\n";
3889                 } else {
3890                         print "<tr class=\"light\">\n";
3891                 }
3892                 $alternate ^= 1;
3893                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3894                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3895                       "<td><i>" . $author . "</i></td>\n" .
3896                       "<td>" .
3897                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3898                                -class => "list subject"},
3899                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3900                 my $comment = $co{'comment'};
3901                 foreach my $line (@$comment) {
3902                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3903                                 my ($lead, $match, $trail) = ($1, $2, $3);
3904                                 $match = chop_str($match, 70, 5, 'center');
3905                                 my $contextlen = int((80 - length($match))/2);
3906                                 $contextlen = 30 if ($contextlen > 30);
3907                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3908                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3909
3910                                 $lead  = esc_html($lead);
3911                                 $match = esc_html($match);
3912                                 $trail = esc_html($trail);
3913
3914                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3915                         }
3916                 }
3917                 print "</td>\n" .
3918                       "<td class=\"link\">" .
3919                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3920                       " | " .
3921                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3922                       " | " .
3923                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3924                 print "</td>\n" .
3925                       "</tr>\n";
3926         }
3927         if (defined $extra) {
3928                 print "<tr>\n" .
3929                       "<td colspan=\"3\">$extra</td>\n" .
3930                       "</tr>\n";
3931         }
3932         print "</table>\n";
3933 }
3934
3935 ## ======================================================================
3936 ## ======================================================================
3937 ## actions
3938
3939 sub git_project_list {
3940         my $order = $cgi->param('o');
3941         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3942                 die_error(400, "Unknown order parameter");
3943         }
3944
3945         my @list = git_get_projects_list();
3946         if (!@list) {
3947                 die_error(404, "No projects found");
3948         }
3949
3950         git_header_html();
3951         if (-f $home_text) {
3952                 print "<div class=\"index_include\">\n";
3953                 open (my $fd, $home_text);
3954                 print <$fd>;
3955                 close $fd;
3956                 print "</div>\n";
3957         }
3958         git_project_list_body(\@list, $order);
3959         git_footer_html();
3960 }
3961
3962 sub git_forks {
3963         my $order = $cgi->param('o');
3964         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3965                 die_error(400, "Unknown order parameter");
3966         }
3967
3968         my @list = git_get_projects_list($project);
3969         if (!@list) {
3970                 die_error(404, "No forks found");
3971         }
3972
3973         git_header_html();
3974         git_print_page_nav('','');
3975         git_print_header_div('summary', "$project forks");
3976         git_project_list_body(\@list, $order);
3977         git_footer_html();
3978 }
3979
3980 sub git_project_index {
3981         my @projects = git_get_projects_list($project);
3982
3983         print $cgi->header(
3984                 -type => 'text/plain',
3985                 -charset => 'utf-8',
3986                 -content_disposition => 'inline; filename="index.aux"');
3987
3988         foreach my $pr (@projects) {
3989                 if (!exists $pr->{'owner'}) {
3990                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3991                 }
3992
3993                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3994                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3995                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3996                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3997                 $path  =~ s/ /\+/g;
3998                 $owner =~ s/ /\+/g;
3999
4000                 print "$path $owner\n";
4001         }
4002 }
4003
4004 sub git_summary {
4005         my $descr = git_get_project_description($project) || "none";
4006         my %co = parse_commit("HEAD");
4007         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4008         my $head = $co{'id'};
4009
4010         my $owner = git_get_project_owner($project);
4011
4012         my $refs = git_get_references();
4013         # These get_*_list functions return one more to allow us to see if
4014         # there are more ...
4015         my @taglist  = git_get_tags_list(16);
4016         my @headlist = git_get_heads_list(16);
4017         my @forklist;
4018         my ($check_forks) = gitweb_check_feature('forks');
4019
4020         if ($check_forks) {
4021                 @forklist = git_get_projects_list($project);
4022         }
4023
4024         git_header_html();
4025         git_print_page_nav('summary','', $head);
4026
4027         print "<div class=\"title\">&nbsp;</div>\n";
4028         print "<table class=\"projects_list\">\n" .
4029               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4030               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4031         if (defined $cd{'rfc2822'}) {
4032                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4033         }
4034
4035         # use per project git URL list in $projectroot/$project/cloneurl
4036         # or make project git URL from git base URL and project name
4037         my $url_tag = "URL";
4038         my @url_list = git_get_project_url_list($project);
4039         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4040         foreach my $git_url (@url_list) {
4041                 next unless $git_url;
4042                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4043                 $url_tag = "";
4044         }
4045         print "</table>\n";
4046
4047         if (-s "$projectroot/$project/README.html") {
4048                 if (open my $fd, "$projectroot/$project/README.html") {
4049                         print "<div class=\"title\">readme</div>\n" .
4050                               "<div class=\"readme\">\n";
4051                         print $_ while (<$fd>);
4052                         print "\n</div>\n"; # class="readme"
4053                         close $fd;
4054                 }
4055         }
4056
4057         # we need to request one more than 16 (0..15) to check if
4058         # those 16 are all
4059         my @commitlist = $head ? parse_commits($head, 17) : ();
4060         if (@commitlist) {
4061                 git_print_header_div('shortlog');
4062                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4063                                   $#commitlist <=  15 ? undef :
4064                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4065         }
4066
4067         if (@taglist) {
4068                 git_print_header_div('tags');
4069                 git_tags_body(\@taglist, 0, 15,
4070                               $#taglist <=  15 ? undef :
4071                               $cgi->a({-href => href(action=>"tags")}, "..."));
4072         }
4073
4074         if (@headlist) {
4075                 git_print_header_div('heads');
4076                 git_heads_body(\@headlist, $head, 0, 15,
4077                                $#headlist <= 15 ? undef :
4078                                $cgi->a({-href => href(action=>"heads")}, "..."));
4079         }
4080
4081         if (@forklist) {
4082                 git_print_header_div('forks');
4083                 git_project_list_body(\@forklist, undef, 0, 15,
4084                                       $#forklist <= 15 ? undef :
4085                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4086                                       'noheader');
4087         }
4088
4089         git_footer_html();
4090 }
4091
4092 sub git_tag {
4093         my $head = git_get_head_hash($project);
4094         git_header_html();
4095         git_print_page_nav('','', $head,undef,$head);
4096         my %tag = parse_tag($hash);
4097
4098         if (! %tag) {
4099                 die_error(404, "Unknown tag object");
4100         }
4101
4102         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4103         print "<div class=\"title_text\">\n" .
4104               "<table class=\"object_header\">\n" .
4105               "<tr>\n" .
4106               "<td>object</td>\n" .
4107               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4108                                $tag{'object'}) . "</td>\n" .
4109               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4110                                               $tag{'type'}) . "</td>\n" .
4111               "</tr>\n";
4112         if (defined($tag{'author'})) {
4113                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4114                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4115                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4116                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4117                         "</td></tr>\n";
4118         }
4119         print "</table>\n\n" .
4120               "</div>\n";
4121         print "<div class=\"page_body\">";
4122         my $comment = $tag{'comment'};
4123         foreach my $line (@$comment) {
4124                 chomp $line;
4125                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4126         }
4127         print "</div>\n";
4128         git_footer_html();
4129 }
4130
4131 sub git_blame2 {
4132         my $fd;
4133         my $ftype;
4134
4135         gitweb_check_feature('blame')
4136             or die_error(403, "Blame view not allowed");
4137
4138         die_error(400, "No file name given") unless $file_name;
4139         $hash_base ||= git_get_head_hash($project);
4140         die_error(404, "Couldn't find base commit") unless ($hash_base);
4141         my %co = parse_commit($hash_base)
4142                 or die_error(404, "Commit not found");
4143         if (!defined $hash) {
4144                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4145                         or die_error(404, "Error looking up file");
4146         }
4147         $ftype = git_get_type($hash);
4148         if ($ftype !~ "blob") {
4149                 die_error(400, "Object is not a blob");
4150         }
4151         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4152               $file_name, $hash_base)
4153                 or die_error(500, "Open git-blame failed");
4154         git_header_html();
4155         my $formats_nav =
4156                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4157                         "blob") .
4158                 " | " .
4159                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4160                         "history") .
4161                 " | " .
4162                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4163                         "HEAD");
4164         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4165         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4166         git_print_page_path($file_name, $ftype, $hash_base);
4167         my @rev_color = (qw(light2 dark2));
4168         my $num_colors = scalar(@rev_color);
4169         my $current_color = 0;
4170         my $last_rev;
4171         print <<HTML;
4172 <div class="page_body">
4173 <table class="blame">
4174 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4175 HTML
4176         my %metainfo = ();
4177         while (1) {
4178                 $_ = <$fd>;
4179                 last unless defined $_;
4180                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4181                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4182                 if (!exists $metainfo{$full_rev}) {
4183                         $metainfo{$full_rev} = {};
4184                 }
4185                 my $meta = $metainfo{$full_rev};
4186                 while (<$fd>) {
4187                         last if (s/^\t//);
4188                         if (/^(\S+) (.*)$/) {
4189                                 $meta->{$1} = $2;
4190                         }
4191                 }
4192                 my $data = $_;
4193                 chomp $data;
4194                 my $rev = substr($full_rev, 0, 8);
4195                 my $author = $meta->{'author'};
4196                 my %date = parse_date($meta->{'author-time'},
4197                                       $meta->{'author-tz'});
4198                 my $date = $date{'iso-tz'};
4199                 if ($group_size) {
4200                         $current_color = ++$current_color % $num_colors;
4201                 }
4202                 print "<tr class=\"$rev_color[$current_color]\">\n";
4203                 if ($group_size) {
4204                         print "<td class=\"sha1\"";
4205                         print " title=\"". esc_html($author) . ", $date\"";
4206                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4207                         print ">";
4208                         print $cgi->a({-href => href(action=>"commit",
4209                                                      hash=>$full_rev,
4210                                                      file_name=>$file_name)},
4211                                       esc_html($rev));
4212                         print "</td>\n";
4213                 }
4214                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4215                         or die_error(500, "Open git-rev-parse failed");
4216                 my $parent_commit = <$dd>;
4217                 close $dd;
4218                 chomp($parent_commit);
4219                 my $blamed = href(action => 'blame',
4220                                   file_name => $meta->{'filename'},
4221                                   hash_base => $parent_commit);
4222                 print "<td class=\"linenr\">";
4223                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4224                                 -id => "l$lineno",
4225                                 -class => "linenr" },
4226                               esc_html($lineno));
4227                 print "</td>";
4228                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4229                 print "</tr>\n";
4230         }
4231         print "</table>\n";
4232         print "</div>";
4233         close $fd
4234                 or print "Reading blob failed\n";
4235         git_footer_html();
4236 }
4237
4238 sub git_blame {
4239         my $fd;
4240
4241         my ($have_blame) = gitweb_check_feature('blame');
4242         if (!$have_blame) {
4243                 die_error('403 Permission denied', "Permission denied");
4244         }
4245         die_error('404 Not Found', "File name not defined") if (!$file_name);
4246         $hash_base ||= git_get_head_hash($project);
4247         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4248         my %co = parse_commit($hash_base)
4249                 or die_error(undef, "Reading commit failed");
4250         if (!defined $hash) {
4251                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4252                         or die_error(undef, "Error lookup file");
4253         }
4254         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4255                 or die_error(undef, "Open git-annotate failed");
4256         git_header_html();
4257         my $formats_nav =
4258                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4259                         "blob") .
4260                 " | " .
4261                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4262                         "history") .
4263                 " | " .
4264                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4265                         "HEAD");
4266         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4267         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4268         git_print_page_path($file_name, 'blob', $hash_base);
4269         print "<div class=\"page_body\">\n";
4270         print <<HTML;
4271 <table class="blame">
4272   <tr>
4273     <th>Commit</th>
4274     <th>Age</th>
4275     <th>Author</th>
4276     <th>Line</th>
4277     <th>Data</th>
4278   </tr>
4279 HTML
4280         my @line_class = (qw(light dark));
4281         my $line_class_len = scalar (@line_class);
4282         my $line_class_num = $#line_class;
4283         while (my $line = <$fd>) {
4284                 my $long_rev;
4285                 my $short_rev;
4286                 my $author;
4287                 my $time;
4288                 my $lineno;
4289                 my $data;
4290                 my $age;
4291                 my $age_str;
4292                 my $age_class;
4293
4294                 chomp $line;
4295                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4296
4297                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4298                         $long_rev = $1;
4299                         $author   = $2;
4300                         $time     = $3;
4301                         $lineno   = $4;
4302                         $data     = $5;
4303                 } else {
4304                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4305                         next;
4306                 }
4307                 $short_rev  = substr ($long_rev, 0, 8);
4308                 $age        = time () - $time;
4309                 $age_str    = age_string ($age);
4310                 $age_str    =~ s/ /&nbsp;/g;
4311                 $age_class  = age_class($age);
4312                 $author     = esc_html ($author);
4313                 $author     =~ s/ /&nbsp;/g;
4314
4315                 $data = untabify($data);
4316                 $data = esc_html ($data);
4317
4318                 print <<HTML;
4319   <tr class="$line_class[$line_class_num]">
4320     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4321     <td class="$age_class">$age_str</td>
4322     <td>$author</td>
4323     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4324     <td class="pre">$data</td>
4325   </tr>
4326 HTML
4327         } # while (my $line = <$fd>)
4328         print "</table>\n\n";
4329         close $fd
4330                 or print "Reading blob failed.\n";
4331         print "</div>";
4332         git_footer_html();
4333 }
4334
4335 sub git_tags {
4336         my $head = git_get_head_hash($project);
4337         git_header_html();
4338         git_print_page_nav('','', $head,undef,$head);
4339         git_print_header_div('summary', $project);
4340
4341         my @tagslist = git_get_tags_list();
4342         if (@tagslist) {
4343                 git_tags_body(\@tagslist);
4344         }
4345         git_footer_html();
4346 }
4347
4348 sub git_heads {
4349         my $head = git_get_head_hash($project);
4350         git_header_html();
4351         git_print_page_nav('','', $head,undef,$head);
4352         git_print_header_div('summary', $project);
4353
4354         my @headslist = git_get_heads_list();
4355         if (@headslist) {
4356                 git_heads_body(\@headslist, $head);
4357         }
4358         git_footer_html();
4359 }
4360
4361 sub git_blob_plain {
4362         my $type = shift;
4363         my $expires;
4364
4365         if (!defined $hash) {
4366                 if (defined $file_name) {
4367                         my $base = $hash_base || git_get_head_hash($project);
4368                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4369                                 or die_error(404, "Cannot find file");
4370                 } else {
4371                         die_error(400, "No file name defined");
4372                 }
4373         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4374                 # blobs defined by non-textual hash id's can be cached
4375                 $expires = "+1d";
4376         }
4377
4378         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4379                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4380
4381         # content-type (can include charset)
4382         $type = blob_contenttype($fd, $file_name, $type);
4383
4384         # "save as" filename, even when no $file_name is given
4385         my $save_as = "$hash";
4386         if (defined $file_name) {
4387                 $save_as = $file_name;
4388         } elsif ($type =~ m/^text\//) {
4389                 $save_as .= '.txt';
4390         }
4391
4392         print $cgi->header(
4393                 -type => $type,
4394                 -expires => $expires,
4395                 -content_disposition => 'inline; filename="' . $save_as . '"');
4396         undef $/;
4397         binmode STDOUT, ':raw';
4398         print <$fd>;
4399         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4400         $/ = "\n";
4401         close $fd;
4402 }
4403
4404 sub git_blob {
4405         my $expires;
4406
4407         if (!defined $hash) {
4408                 if (defined $file_name) {
4409                         my $base = $hash_base || git_get_head_hash($project);
4410                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4411                                 or die_error(404, "Cannot find file");
4412                 } else {
4413                         die_error(400, "No file name defined");
4414                 }
4415         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4416                 # blobs defined by non-textual hash id's can be cached
4417                 $expires = "+1d";
4418         }
4419
4420         my ($have_blame) = gitweb_check_feature('blame');
4421         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4422                 or die_error(500, "Couldn't cat $file_name, $hash");
4423         my $mimetype = blob_mimetype($fd, $file_name);
4424         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4425                 close $fd;
4426                 return git_blob_plain($mimetype);
4427         }
4428         # we can have blame only for text/* mimetype
4429         $have_blame &&= ($mimetype =~ m!^text/!);
4430
4431         git_header_html(undef, $expires);
4432         my $formats_nav = '';
4433         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4434                 if (defined $file_name) {
4435                         if ($have_blame) {
4436                                 $formats_nav .=
4437                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4438                                                 "blame") .
4439                                         " | ";
4440                         }
4441                         $formats_nav .=
4442                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4443                                         "history") .
4444                                 " | " .
4445                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4446                                         "raw") .
4447                                 " | " .
4448                                 $cgi->a({-href => href(action=>"blob",
4449                                                        hash_base=>"HEAD", file_name=>$file_name)},
4450                                         "HEAD");
4451                 } else {
4452                         $formats_nav .=
4453                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4454                                         "raw");
4455                 }
4456                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4457                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4458         } else {
4459                 print "<div class=\"page_nav\">\n" .
4460                       "<br/><br/></div>\n" .
4461                       "<div class=\"title\">$hash</div>\n";
4462         }
4463         git_print_page_path($file_name, "blob", $hash_base);
4464         print "<div class=\"page_body\">\n";
4465         if ($mimetype =~ m!^image/!) {
4466                 print qq!<img type="$mimetype"!;
4467                 if ($file_name) {
4468                         print qq! alt="$file_name" title="$file_name"!;
4469                 }
4470                 print qq! src="! .
4471                       href(action=>"blob_plain", hash=>$hash,
4472                            hash_base=>$hash_base, file_name=>$file_name) .
4473                       qq!" />\n!;
4474         } else {
4475                 my $nr;
4476                 while (my $line = <$fd>) {
4477                         chomp $line;
4478                         $nr++;
4479                         $line = untabify($line);
4480                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4481                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4482                 }
4483         }
4484         close $fd
4485                 or print "Reading blob failed.\n";
4486         print "</div>";
4487         git_footer_html();
4488 }
4489
4490 sub git_tree {
4491         if (!defined $hash_base) {
4492                 $hash_base = "HEAD";
4493         }
4494         if (!defined $hash) {
4495                 if (defined $file_name) {
4496                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4497                 } else {
4498                         $hash = $hash_base;
4499                 }
4500         }
4501         $/ = "\0";
4502         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4503                 or die_error(500, "Open git-ls-tree failed");
4504         my @entries = map { chomp; $_ } <$fd>;
4505         close $fd or die_error(404, "Reading tree failed");
4506         $/ = "\n";
4507
4508         my $refs = git_get_references();
4509         my $ref = format_ref_marker($refs, $hash_base);
4510         git_header_html();
4511         my $basedir = '';
4512         my ($have_blame) = gitweb_check_feature('blame');
4513         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4514                 my @views_nav = ();
4515                 if (defined $file_name) {
4516                         push @views_nav,
4517                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4518                                         "history"),
4519                                 $cgi->a({-href => href(action=>"tree",
4520                                                        hash_base=>"HEAD", file_name=>$file_name)},
4521                                         "HEAD"),
4522                 }
4523                 my $snapshot_links = format_snapshot_links($hash);
4524                 if (defined $snapshot_links) {
4525                         # FIXME: Should be available when we have no hash base as well.
4526                         push @views_nav, $snapshot_links;
4527                 }
4528                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4529                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4530         } else {
4531                 undef $hash_base;
4532                 print "<div class=\"page_nav\">\n";
4533                 print "<br/><br/></div>\n";
4534                 print "<div class=\"title\">$hash</div>\n";
4535         }
4536         if (defined $file_name) {
4537                 $basedir = $file_name;
4538                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4539                         $basedir .= '/';
4540                 }
4541         }
4542         git_print_page_path($file_name, 'tree', $hash_base);
4543         print "<div class=\"page_body\">\n";
4544         print "<table class=\"tree\">\n";
4545         my $alternate = 1;
4546         # '..' (top directory) link if possible
4547         if (defined $hash_base &&
4548             defined $file_name && $file_name =~ m![^/]+$!) {
4549                 if ($alternate) {
4550                         print "<tr class=\"dark\">\n";
4551                 } else {
4552                         print "<tr class=\"light\">\n";
4553                 }
4554                 $alternate ^= 1;
4555
4556                 my $up = $file_name;
4557                 $up =~ s!/?[^/]+$!!;
4558                 undef $up unless $up;
4559                 # based on git_print_tree_entry
4560                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4561                 print '<td class="list">';
4562                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4563                                              file_name=>$up)},
4564                               "..");
4565                 print "</td>\n";
4566                 print "<td class=\"link\"></td>\n";
4567
4568                 print "</tr>\n";
4569         }
4570         foreach my $line (@entries) {
4571                 my %t = parse_ls_tree_line($line, -z => 1);
4572
4573                 if ($alternate) {
4574                         print "<tr class=\"dark\">\n";
4575                 } else {
4576                         print "<tr class=\"light\">\n";
4577                 }
4578                 $alternate ^= 1;
4579
4580                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4581
4582                 print "</tr>\n";
4583         }
4584         print "</table>\n" .
4585               "</div>";
4586         git_footer_html();
4587 }
4588
4589 sub git_snapshot {
4590         my @supported_fmts = gitweb_check_feature('snapshot');
4591         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4592
4593         my $format = $cgi->param('sf');
4594         if (!@supported_fmts) {
4595                 die_error(403, "Snapshots not allowed");
4596         }
4597         # default to first supported snapshot format
4598         $format ||= $supported_fmts[0];
4599         if ($format !~ m/^[a-z0-9]+$/) {
4600                 die_error(400, "Invalid snapshot format parameter");
4601         } elsif (!exists($known_snapshot_formats{$format})) {
4602                 die_error(400, "Unknown snapshot format");
4603         } elsif (!grep($_ eq $format, @supported_fmts)) {
4604                 die_error(403, "Unsupported snapshot format");
4605         }
4606
4607         if (!defined $hash) {
4608                 $hash = git_get_head_hash($project);
4609         }
4610
4611         my $name = $project;
4612         $name =~ s,([^/])/*\.git$,$1,;
4613         $name = basename($name);
4614         my $filename = to_utf8($name);
4615         $name =~ s/\047/\047\\\047\047/g;
4616         my $cmd;
4617         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4618         $cmd = quote_command(
4619                 git_cmd(), 'archive',
4620                 "--format=$known_snapshot_formats{$format}{'format'}",
4621                 "--prefix=$name/", $hash);
4622         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4623                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4624         }
4625
4626         print $cgi->header(
4627                 -type => $known_snapshot_formats{$format}{'type'},
4628                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4629                 -status => '200 OK');
4630
4631         open my $fd, "-|", $cmd
4632                 or die_error(500, "Execute git-archive failed");
4633         binmode STDOUT, ':raw';
4634         print <$fd>;
4635         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4636         close $fd;
4637 }
4638
4639 sub git_log {
4640         my $head = git_get_head_hash($project);
4641         if (!defined $hash) {
4642                 $hash = $head;
4643         }
4644         if (!defined $page) {
4645                 $page = 0;
4646         }
4647         my $refs = git_get_references();
4648
4649         my @commitlist = parse_commits($hash, 101, (100 * $page));
4650
4651         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4652
4653         git_header_html();
4654         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4655
4656         if (!@commitlist) {
4657                 my %co = parse_commit($hash);
4658
4659                 git_print_header_div('summary', $project);
4660                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4661         }
4662         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4663         for (my $i = 0; $i <= $to; $i++) {
4664                 my %co = %{$commitlist[$i]};
4665                 next if !%co;
4666                 my $commit = $co{'id'};
4667                 my $ref = format_ref_marker($refs, $commit);
4668                 my %ad = parse_date($co{'author_epoch'});
4669                 git_print_header_div('commit',
4670                                "<span class=\"age\">$co{'age_string'}</span>" .
4671                                esc_html($co{'title'}) . $ref,
4672                                $commit);
4673                 print "<div class=\"title_text\">\n" .
4674                       "<div class=\"log_link\">\n" .
4675                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4676                       " | " .
4677                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4678                       " | " .
4679                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4680                       "<br/>\n" .
4681                       "</div>\n" .
4682                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4683                       "</div>\n";
4684
4685                 print "<div class=\"log_body\">\n";
4686                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4687                 print "</div>\n";
4688         }
4689         if ($#commitlist >= 100) {
4690                 print "<div class=\"page_nav\">\n";
4691                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4692                                -accesskey => "n", -title => "Alt-n"}, "next");
4693                 print "</div>\n";
4694         }
4695         git_footer_html();
4696 }
4697
4698 sub git_commit {
4699         $hash ||= $hash_base || "HEAD";
4700         my %co = parse_commit($hash)
4701             or die_error(404, "Unknown commit object");
4702         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4703         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4704
4705         my $parent  = $co{'parent'};
4706         my $parents = $co{'parents'}; # listref
4707
4708         # we need to prepare $formats_nav before any parameter munging
4709         my $formats_nav;
4710         if (!defined $parent) {
4711                 # --root commitdiff
4712                 $formats_nav .= '(initial)';
4713         } elsif (@$parents == 1) {
4714                 # single parent commit
4715                 $formats_nav .=
4716                         '(parent: ' .
4717                         $cgi->a({-href => href(action=>"commit",
4718                                                hash=>$parent)},
4719                                 esc_html(substr($parent, 0, 7))) .
4720                         ')';
4721         } else {
4722                 # merge commit
4723                 $formats_nav .=
4724                         '(merge: ' .
4725                         join(' ', map {
4726                                 $cgi->a({-href => href(action=>"commit",
4727                                                        hash=>$_)},
4728                                         esc_html(substr($_, 0, 7)));
4729                         } @$parents ) .
4730                         ')';
4731         }
4732
4733         if (!defined $parent) {
4734                 $parent = "--root";
4735         }
4736         my @difftree;
4737         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4738                 @diff_opts,
4739                 (@$parents <= 1 ? $parent : '-c'),
4740                 $hash, "--"
4741                 or die_error(500, "Open git-diff-tree failed");
4742         @difftree = map { chomp; $_ } <$fd>;
4743         close $fd or die_error(404, "Reading git-diff-tree failed");
4744
4745         # non-textual hash id's can be cached
4746         my $expires;
4747         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4748                 $expires = "+1d";
4749         }
4750         my $refs = git_get_references();
4751         my $ref = format_ref_marker($refs, $co{'id'});
4752
4753         git_header_html(undef, $expires);
4754         git_print_page_nav('commit', '',
4755                            $hash, $co{'tree'}, $hash,
4756                            $formats_nav);
4757
4758         if (defined $co{'parent'}) {
4759                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4760         } else {
4761                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4762         }
4763         print "<div class=\"title_text\">\n" .
4764               "<table class=\"object_header\">\n";
4765         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4766               "<tr>" .
4767               "<td></td><td> $ad{'rfc2822'}";
4768         if ($ad{'hour_local'} < 6) {
4769                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4770                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4771         } else {
4772                 printf(" (%02d:%02d %s)",
4773                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4774         }
4775         print "</td>" .
4776               "</tr>\n";
4777         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4778         print "<tr><td></td><td> $cd{'rfc2822'}" .
4779               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4780               "</td></tr>\n";
4781         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4782         print "<tr>" .
4783               "<td>tree</td>" .
4784               "<td class=\"sha1\">" .
4785               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4786                        class => "list"}, $co{'tree'}) .
4787               "</td>" .
4788               "<td class=\"link\">" .
4789               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4790                       "tree");
4791         my $snapshot_links = format_snapshot_links($hash);
4792         if (defined $snapshot_links) {
4793                 print " | " . $snapshot_links;
4794         }
4795         print "</td>" .
4796               "</tr>\n";
4797
4798         foreach my $par (@$parents) {
4799                 print "<tr>" .
4800                       "<td>parent</td>" .
4801                       "<td class=\"sha1\">" .
4802                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4803                                class => "list"}, $par) .
4804                       "</td>" .
4805                       "<td class=\"link\">" .
4806                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4807                       " | " .
4808                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4809                       "</td>" .
4810                       "</tr>\n";
4811         }
4812         print "</table>".
4813               "</div>\n";
4814
4815         print "<div class=\"page_body\">\n";
4816         git_print_log($co{'comment'});
4817         print "</div>\n";
4818
4819         git_difftree_body(\@difftree, $hash, @$parents);
4820
4821         git_footer_html();
4822 }
4823
4824 sub git_object {
4825         # object is defined by:
4826         # - hash or hash_base alone
4827         # - hash_base and file_name
4828         my $type;
4829
4830         # - hash or hash_base alone
4831         if ($hash || ($hash_base && !defined $file_name)) {
4832                 my $object_id = $hash || $hash_base;
4833
4834                 open my $fd, "-|", quote_command(
4835                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4836                         or die_error(404, "Object does not exist");
4837                 $type = <$fd>;
4838                 chomp $type;
4839                 close $fd
4840                         or die_error(404, "Object does not exist");
4841
4842         # - hash_base and file_name
4843         } elsif ($hash_base && defined $file_name) {
4844                 $file_name =~ s,/+$,,;
4845
4846                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4847                         or die_error(404, "Base object does not exist");
4848
4849                 # here errors should not hapen
4850                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4851                         or die_error(500, "Open git-ls-tree failed");
4852                 my $line = <$fd>;
4853                 close $fd;
4854
4855                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4856                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4857                         die_error(404, "File or directory for given base does not exist");
4858                 }
4859                 $type = $2;
4860                 $hash = $3;
4861         } else {
4862                 die_error(400, "Not enough information to find object");
4863         }
4864
4865         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4866                                           hash=>$hash, hash_base=>$hash_base,
4867                                           file_name=>$file_name),
4868                              -status => '302 Found');
4869 }
4870
4871 sub git_blobdiff {
4872         my $format = shift || 'html';
4873
4874         my $fd;
4875         my @difftree;
4876         my %diffinfo;
4877         my $expires;
4878
4879         # preparing $fd and %diffinfo for git_patchset_body
4880         # new style URI
4881         if (defined $hash_base && defined $hash_parent_base) {
4882                 if (defined $file_name) {
4883                         # read raw output
4884                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4885                                 $hash_parent_base, $hash_base,
4886                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4887                                 or die_error(500, "Open git-diff-tree failed");
4888                         @difftree = map { chomp; $_ } <$fd>;
4889                         close $fd
4890                                 or die_error(404, "Reading git-diff-tree failed");
4891                         @difftree
4892                                 or die_error(404, "Blob diff not found");
4893
4894                 } elsif (defined $hash &&
4895                          $hash =~ /[0-9a-fA-F]{40}/) {
4896                         # try to find filename from $hash
4897
4898                         # read filtered raw output
4899                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4900                                 $hash_parent_base, $hash_base, "--"
4901                                 or die_error(500, "Open git-diff-tree failed");
4902                         @difftree =
4903                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4904                                 # $hash == to_id
4905                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4906                                 map { chomp; $_ } <$fd>;
4907                         close $fd
4908                                 or die_error(404, "Reading git-diff-tree failed");
4909                         @difftree
4910                                 or die_error(404, "Blob diff not found");
4911
4912                 } else {
4913                         die_error(400, "Missing one of the blob diff parameters");
4914                 }
4915
4916                 if (@difftree > 1) {
4917                         die_error(400, "Ambiguous blob diff specification");
4918                 }
4919
4920                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4921                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4922                 $file_name   ||= $diffinfo{'to_file'};
4923
4924                 $hash_parent ||= $diffinfo{'from_id'};
4925                 $hash        ||= $diffinfo{'to_id'};
4926
4927                 # non-textual hash id's can be cached
4928                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4929                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4930                         $expires = '+1d';
4931                 }
4932
4933                 # open patch output
4934                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4935                         '-p', ($format eq 'html' ? "--full-index" : ()),
4936                         $hash_parent_base, $hash_base,
4937                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4938                         or die_error(500, "Open git-diff-tree failed");
4939         }
4940
4941         # old/legacy style URI
4942         if (!%diffinfo && # if new style URI failed
4943             defined $hash && defined $hash_parent) {
4944                 # fake git-diff-tree raw output
4945                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4946                 $diffinfo{'from_id'} = $hash_parent;
4947                 $diffinfo{'to_id'}   = $hash;
4948                 if (defined $file_name) {
4949                         if (defined $file_parent) {
4950                                 $diffinfo{'status'} = '2';
4951                                 $diffinfo{'from_file'} = $file_parent;
4952                                 $diffinfo{'to_file'}   = $file_name;
4953                         } else { # assume not renamed
4954                                 $diffinfo{'status'} = '1';
4955                                 $diffinfo{'from_file'} = $file_name;
4956                                 $diffinfo{'to_file'}   = $file_name;
4957                         }
4958                 } else { # no filename given
4959                         $diffinfo{'status'} = '2';
4960                         $diffinfo{'from_file'} = $hash_parent;
4961                         $diffinfo{'to_file'}   = $hash;
4962                 }
4963
4964                 # non-textual hash id's can be cached
4965                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4966                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4967                         $expires = '+1d';
4968                 }
4969
4970                 # open patch output
4971                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4972                         '-p', ($format eq 'html' ? "--full-index" : ()),
4973                         $hash_parent, $hash, "--"
4974                         or die_error(500, "Open git-diff failed");
4975         } else  {
4976                 die_error(400, "Missing one of the blob diff parameters")
4977                         unless %diffinfo;
4978         }
4979
4980         # header
4981         if ($format eq 'html') {
4982                 my $formats_nav =
4983                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4984                                 "raw");
4985                 git_header_html(undef, $expires);
4986                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4987                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4988                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4989                 } else {
4990                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4991                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4992                 }
4993                 if (defined $file_name) {
4994                         git_print_page_path($file_name, "blob", $hash_base);
4995                 } else {
4996                         print "<div class=\"page_path\"></div>\n";
4997                 }
4998
4999         } elsif ($format eq 'plain') {
5000                 print $cgi->header(
5001                         -type => 'text/plain',
5002                         -charset => 'utf-8',
5003                         -expires => $expires,
5004                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5005
5006                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5007
5008         } else {
5009                 die_error(400, "Unknown blobdiff format");
5010         }
5011
5012         # patch
5013         if ($format eq 'html') {
5014                 print "<div class=\"page_body\">\n";
5015
5016                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5017                 close $fd;
5018
5019                 print "</div>\n"; # class="page_body"
5020                 git_footer_html();
5021
5022         } else {
5023                 while (my $line = <$fd>) {
5024                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5025                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5026
5027                         print $line;
5028
5029                         last if $line =~ m!^\+\+\+!;
5030                 }
5031                 local $/ = undef;
5032                 print <$fd>;
5033                 close $fd;
5034         }
5035 }
5036
5037 sub git_blobdiff_plain {
5038         git_blobdiff('plain');
5039 }
5040
5041 sub git_commitdiff {
5042         my $format = shift || 'html';
5043         $hash ||= $hash_base || "HEAD";
5044         my %co = parse_commit($hash)
5045             or die_error(404, "Unknown commit object");
5046
5047         # choose format for commitdiff for merge
5048         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5049                 $hash_parent = '--cc';
5050         }
5051         # we need to prepare $formats_nav before almost any parameter munging
5052         my $formats_nav;
5053         if ($format eq 'html') {
5054                 $formats_nav =
5055                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5056                                 "raw");
5057
5058                 if (defined $hash_parent &&
5059                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5060                         # commitdiff with two commits given
5061                         my $hash_parent_short = $hash_parent;
5062                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5063                                 $hash_parent_short = substr($hash_parent, 0, 7);
5064                         }
5065                         $formats_nav .=
5066                                 ' (from';
5067                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5068                                 if ($co{'parents'}[$i] eq $hash_parent) {
5069                                         $formats_nav .= ' parent ' . ($i+1);
5070                                         last;
5071                                 }
5072                         }
5073                         $formats_nav .= ': ' .
5074                                 $cgi->a({-href => href(action=>"commitdiff",
5075                                                        hash=>$hash_parent)},
5076                                         esc_html($hash_parent_short)) .
5077                                 ')';
5078                 } elsif (!$co{'parent'}) {
5079                         # --root commitdiff
5080                         $formats_nav .= ' (initial)';
5081                 } elsif (scalar @{$co{'parents'}} == 1) {
5082                         # single parent commit
5083                         $formats_nav .=
5084                                 ' (parent: ' .
5085                                 $cgi->a({-href => href(action=>"commitdiff",
5086                                                        hash=>$co{'parent'})},
5087                                         esc_html(substr($co{'parent'}, 0, 7))) .
5088                                 ')';
5089                 } else {
5090                         # merge commit
5091                         if ($hash_parent eq '--cc') {
5092                                 $formats_nav .= ' | ' .
5093                                         $cgi->a({-href => href(action=>"commitdiff",
5094                                                                hash=>$hash, hash_parent=>'-c')},
5095                                                 'combined');
5096                         } else { # $hash_parent eq '-c'
5097                                 $formats_nav .= ' | ' .
5098                                         $cgi->a({-href => href(action=>"commitdiff",
5099                                                                hash=>$hash, hash_parent=>'--cc')},
5100                                                 'compact');
5101                         }
5102                         $formats_nav .=
5103                                 ' (merge: ' .
5104                                 join(' ', map {
5105                                         $cgi->a({-href => href(action=>"commitdiff",
5106                                                                hash=>$_)},
5107                                                 esc_html(substr($_, 0, 7)));
5108                                 } @{$co{'parents'}} ) .
5109                                 ')';
5110                 }
5111         }
5112
5113         my $hash_parent_param = $hash_parent;
5114         if (!defined $hash_parent_param) {
5115                 # --cc for multiple parents, --root for parentless
5116                 $hash_parent_param =
5117                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5118         }
5119
5120         # read commitdiff
5121         my $fd;
5122         my @difftree;
5123         if ($format eq 'html') {
5124                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5125                         "--no-commit-id", "--patch-with-raw", "--full-index",
5126                         $hash_parent_param, $hash, "--"
5127                         or die_error(500, "Open git-diff-tree failed");
5128
5129                 while (my $line = <$fd>) {
5130                         chomp $line;
5131                         # empty line ends raw part of diff-tree output
5132                         last unless $line;
5133                         push @difftree, scalar parse_difftree_raw_line($line);
5134                 }
5135
5136         } elsif ($format eq 'plain') {
5137                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5138                         '-p', $hash_parent_param, $hash, "--"
5139                         or die_error(500, "Open git-diff-tree failed");
5140
5141         } else {
5142                 die_error(400, "Unknown commitdiff format");
5143         }
5144
5145         # non-textual hash id's can be cached
5146         my $expires;
5147         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5148                 $expires = "+1d";
5149         }
5150
5151         # write commit message
5152         if ($format eq 'html') {
5153                 my $refs = git_get_references();
5154                 my $ref = format_ref_marker($refs, $co{'id'});
5155
5156                 git_header_html(undef, $expires);
5157                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5158                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5159                 git_print_authorship(\%co);
5160                 print "<div class=\"page_body\">\n";
5161                 if (@{$co{'comment'}} > 1) {
5162                         print "<div class=\"log\">\n";
5163                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5164                         print "</div>\n"; # class="log"
5165                 }
5166
5167         } elsif ($format eq 'plain') {
5168                 my $refs = git_get_references("tags");
5169                 my $tagname = git_get_rev_name_tags($hash);
5170                 my $filename = basename($project) . "-$hash.patch";
5171
5172                 print $cgi->header(
5173                         -type => 'text/plain',
5174                         -charset => 'utf-8',
5175                         -expires => $expires,
5176                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5177                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5178                 print "From: " . to_utf8($co{'author'}) . "\n";
5179                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5180                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5181
5182                 print "X-Git-Tag: $tagname\n" if $tagname;
5183                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5184
5185                 foreach my $line (@{$co{'comment'}}) {
5186                         print to_utf8($line) . "\n";
5187                 }
5188                 print "---\n\n";
5189         }
5190
5191         # write patch
5192         if ($format eq 'html') {
5193                 my $use_parents = !defined $hash_parent ||
5194                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5195                 git_difftree_body(\@difftree, $hash,
5196                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5197                 print "<br/>\n";
5198
5199                 git_patchset_body($fd, \@difftree, $hash,
5200                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5201                 close $fd;
5202                 print "</div>\n"; # class="page_body"
5203                 git_footer_html();
5204
5205         } elsif ($format eq 'plain') {
5206                 local $/ = undef;
5207                 print <$fd>;
5208                 close $fd
5209                         or print "Reading git-diff-tree failed\n";
5210         }
5211 }
5212
5213 sub git_commitdiff_plain {
5214         git_commitdiff('plain');
5215 }
5216
5217 sub git_history {
5218         if (!defined $hash_base) {
5219                 $hash_base = git_get_head_hash($project);
5220         }
5221         if (!defined $page) {
5222                 $page = 0;
5223         }
5224         my $ftype;
5225         my %co = parse_commit($hash_base)
5226             or die_error(404, "Unknown commit object");
5227
5228         my $refs = git_get_references();
5229         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5230
5231         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5232                                        $file_name, "--full-history")
5233             or die_error(404, "No such file or directory on given branch");
5234
5235         if (!defined $hash && defined $file_name) {
5236                 # some commits could have deleted file in question,
5237                 # and not have it in tree, but one of them has to have it
5238                 for (my $i = 0; $i <= @commitlist; $i++) {
5239                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5240                         last if defined $hash;
5241                 }
5242         }
5243         if (defined $hash) {
5244                 $ftype = git_get_type($hash);
5245         }
5246         if (!defined $ftype) {
5247                 die_error(500, "Unknown type of object");
5248         }
5249
5250         my $paging_nav = '';
5251         if ($page > 0) {
5252                 $paging_nav .=
5253                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5254                                                file_name=>$file_name)},
5255                                 "first");
5256                 $paging_nav .= " &sdot; " .
5257                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5258                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5259         } else {
5260                 $paging_nav .= "first";
5261                 $paging_nav .= " &sdot; prev";
5262         }
5263         my $next_link = '';
5264         if ($#commitlist >= 100) {
5265                 $next_link =
5266                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5267                                  -accesskey => "n", -title => "Alt-n"}, "next");
5268                 $paging_nav .= " &sdot; $next_link";
5269         } else {
5270                 $paging_nav .= " &sdot; next";
5271         }
5272
5273         git_header_html();
5274         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5275         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5276         git_print_page_path($file_name, $ftype, $hash_base);
5277
5278         git_history_body(\@commitlist, 0, 99,
5279                          $refs, $hash_base, $ftype, $next_link);
5280
5281         git_footer_html();
5282 }
5283
5284 sub git_search {
5285         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5286         if (!defined $searchtext) {
5287                 die_error(400, "Text field is empty");
5288         }
5289         if (!defined $hash) {
5290                 $hash = git_get_head_hash($project);
5291         }
5292         my %co = parse_commit($hash);
5293         if (!%co) {
5294                 die_error(404, "Unknown commit object");
5295         }
5296         if (!defined $page) {
5297                 $page = 0;
5298         }
5299
5300         $searchtype ||= 'commit';
5301         if ($searchtype eq 'pickaxe') {
5302                 # pickaxe may take all resources of your box and run for several minutes
5303                 # with every query - so decide by yourself how public you make this feature
5304                 gitweb_check_feature('pickaxe')
5305                     or die_error(403, "Pickaxe is disabled");
5306         }
5307         if ($searchtype eq 'grep') {
5308                 gitweb_check_feature('grep')
5309                     or die_error(403, "Grep is disabled");
5310         }
5311
5312         git_header_html();
5313
5314         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5315                 my $greptype;
5316                 if ($searchtype eq 'commit') {
5317                         $greptype = "--grep=";
5318                 } elsif ($searchtype eq 'author') {
5319                         $greptype = "--author=";
5320                 } elsif ($searchtype eq 'committer') {
5321                         $greptype = "--committer=";
5322                 }
5323                 $greptype .= $searchtext;
5324                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5325                                                $greptype, '--regexp-ignore-case',
5326                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5327
5328                 my $paging_nav = '';
5329                 if ($page > 0) {
5330                         $paging_nav .=
5331                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5332                                                        searchtext=>$searchtext,
5333                                                        searchtype=>$searchtype)},
5334                                         "first");
5335                         $paging_nav .= " &sdot; " .
5336                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5337                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5338                 } else {
5339                         $paging_nav .= "first";
5340                         $paging_nav .= " &sdot; prev";
5341                 }
5342                 my $next_link = '';
5343                 if ($#commitlist >= 100) {
5344                         $next_link =
5345                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5346                                          -accesskey => "n", -title => "Alt-n"}, "next");
5347                         $paging_nav .= " &sdot; $next_link";
5348                 } else {
5349                         $paging_nav .= " &sdot; next";
5350                 }
5351
5352                 if ($#commitlist >= 100) {
5353                 }
5354
5355                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5356                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5357                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5358         }
5359
5360         if ($searchtype eq 'pickaxe') {
5361                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5362                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5363
5364                 print "<table class=\"pickaxe search\">\n";
5365                 my $alternate = 1;
5366                 $/ = "\n";
5367                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5368                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5369                         ($search_use_regexp ? '--pickaxe-regex' : ());
5370                 undef %co;
5371                 my @files;
5372                 while (my $line = <$fd>) {
5373                         chomp $line;
5374                         next unless $line;
5375
5376                         my %set = parse_difftree_raw_line($line);
5377                         if (defined $set{'commit'}) {
5378                                 # finish previous commit
5379                                 if (%co) {
5380                                         print "</td>\n" .
5381                                               "<td class=\"link\">" .
5382                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5383                                               " | " .
5384                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5385                                         print "</td>\n" .
5386                                               "</tr>\n";
5387                                 }
5388
5389                                 if ($alternate) {
5390                                         print "<tr class=\"dark\">\n";
5391                                 } else {
5392                                         print "<tr class=\"light\">\n";
5393                                 }
5394                                 $alternate ^= 1;
5395                                 %co = parse_commit($set{'commit'});
5396                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5397                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5398                                       "<td><i>$author</i></td>\n" .
5399                                       "<td>" .
5400                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5401                                               -class => "list subject"},
5402                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5403                         } elsif (defined $set{'to_id'}) {
5404                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5405
5406                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5407                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5408                                               -class => "list"},
5409                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5410                                       "<br/>\n";
5411                         }
5412                 }
5413                 close $fd;
5414
5415                 # finish last commit (warning: repetition!)
5416                 if (%co) {
5417                         print "</td>\n" .
5418                               "<td class=\"link\">" .
5419                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5420                               " | " .
5421                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5422                         print "</td>\n" .
5423                               "</tr>\n";
5424                 }
5425
5426                 print "</table>\n";
5427         }
5428
5429         if ($searchtype eq 'grep') {
5430                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5431                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5432
5433                 print "<table class=\"grep_search\">\n";
5434                 my $alternate = 1;
5435                 my $matches = 0;
5436                 $/ = "\n";
5437                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5438                         $search_use_regexp ? ('-E', '-i') : '-F',
5439                         $searchtext, $co{'tree'};
5440                 my $lastfile = '';
5441                 while (my $line = <$fd>) {
5442                         chomp $line;
5443                         my ($file, $lno, $ltext, $binary);
5444                         last if ($matches++ > 1000);
5445                         if ($line =~ /^Binary file (.+) matches$/) {
5446                                 $file = $1;
5447                                 $binary = 1;
5448                         } else {
5449                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5450                         }
5451                         if ($file ne $lastfile) {
5452                                 $lastfile and print "</td></tr>\n";
5453                                 if ($alternate++) {
5454                                         print "<tr class=\"dark\">\n";
5455                                 } else {
5456                                         print "<tr class=\"light\">\n";
5457                                 }
5458                                 print "<td class=\"list\">".
5459                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5460                                                                file_name=>"$file"),
5461                                                 -class => "list"}, esc_path($file));
5462                                 print "</td><td>\n";
5463                                 $lastfile = $file;
5464                         }
5465                         if ($binary) {
5466                                 print "<div class=\"binary\">Binary file</div>\n";
5467                         } else {
5468                                 $ltext = untabify($ltext);
5469                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5470                                         $ltext = esc_html($1, -nbsp=>1);
5471                                         $ltext .= '<span class="match">';
5472                                         $ltext .= esc_html($2, -nbsp=>1);
5473                                         $ltext .= '</span>';
5474                                         $ltext .= esc_html($3, -nbsp=>1);
5475                                 } else {
5476                                         $ltext = esc_html($ltext, -nbsp=>1);
5477                                 }
5478                                 print "<div class=\"pre\">" .
5479                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5480                                                                file_name=>"$file").'#l'.$lno,
5481                                                 -class => "linenr"}, sprintf('%4i', $lno))
5482                                         . ' ' .  $ltext . "</div>\n";
5483                         }
5484                 }
5485                 if ($lastfile) {
5486                         print "</td></tr>\n";
5487                         if ($matches > 1000) {
5488                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5489                         }
5490                 } else {
5491                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5492                 }
5493                 close $fd;
5494
5495                 print "</table>\n";
5496         }
5497         git_footer_html();
5498 }
5499
5500 sub git_search_help {
5501         git_header_html();
5502         git_print_page_nav('','', $hash,$hash,$hash);
5503         print <<EOT;
5504 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5505 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5506 the pattern entered is recognized as the POSIX extended
5507 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5508 insensitive).</p>
5509 <dl>
5510 <dt><b>commit</b></dt>
5511 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5512 EOT
5513         my ($have_grep) = gitweb_check_feature('grep');
5514         if ($have_grep) {
5515                 print <<EOT;
5516 <dt><b>grep</b></dt>
5517 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5518     a different one) are searched for the given pattern. On large trees, this search can take
5519 a while and put some strain on the server, so please use it with some consideration. Note that
5520 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5521 case-sensitive.</dd>
5522 EOT
5523         }
5524         print <<EOT;
5525 <dt><b>author</b></dt>
5526 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5527 <dt><b>committer</b></dt>
5528 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5529 EOT
5530         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5531         if ($have_pickaxe) {
5532                 print <<EOT;
5533 <dt><b>pickaxe</b></dt>
5534 <dd>All commits that caused the string to appear or disappear from any file (changes that
5535 added, removed or "modified" the string) will be listed. This search can take a while and
5536 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5537 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5538 EOT
5539         }
5540         print "</dl>\n";
5541         git_footer_html();
5542 }
5543
5544 sub git_shortlog {
5545         my $head = git_get_head_hash($project);
5546         if (!defined $hash) {
5547                 $hash = $head;
5548         }
5549         if (!defined $page) {
5550                 $page = 0;
5551         }
5552         my $refs = git_get_references();
5553
5554         my @commitlist = parse_commits($hash, 101, (100 * $page));
5555
5556         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5557         my $next_link = '';
5558         if ($#commitlist >= 100) {
5559                 $next_link =
5560                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5561                                  -accesskey => "n", -title => "Alt-n"}, "next");
5562         }
5563
5564         git_header_html();
5565         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5566         git_print_header_div('summary', $project);
5567
5568         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5569
5570         git_footer_html();
5571 }
5572
5573 ## ......................................................................
5574 ## feeds (RSS, Atom; OPML)
5575
5576 sub git_feed {
5577         my $format = shift || 'atom';
5578         my ($have_blame) = gitweb_check_feature('blame');
5579
5580         # Atom: http://www.atomenabled.org/developers/syndication/
5581         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5582         if ($format ne 'rss' && $format ne 'atom') {
5583                 die_error(400, "Unknown web feed format");
5584         }
5585
5586         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5587         my $head = $hash || 'HEAD';
5588         my @commitlist = parse_commits($head, 150, 0, $file_name);
5589
5590         my %latest_commit;
5591         my %latest_date;
5592         my $content_type = "application/$format+xml";
5593         if (defined $cgi->http('HTTP_ACCEPT') &&
5594                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5595                 # browser (feed reader) prefers text/xml
5596                 $content_type = 'text/xml';
5597         }
5598         if (defined($commitlist[0])) {
5599                 %latest_commit = %{$commitlist[0]};
5600                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5601                 print $cgi->header(
5602                         -type => $content_type,
5603                         -charset => 'utf-8',
5604                         -last_modified => $latest_date{'rfc2822'});
5605         } else {
5606                 print $cgi->header(
5607                         -type => $content_type,
5608                         -charset => 'utf-8');
5609         }
5610
5611         # Optimization: skip generating the body if client asks only
5612         # for Last-Modified date.
5613         return if ($cgi->request_method() eq 'HEAD');
5614
5615         # header variables
5616         my $title = "$site_name - $project/$action";
5617         my $feed_type = 'log';
5618         if (defined $hash) {
5619                 $title .= " - '$hash'";
5620                 $feed_type = 'branch log';
5621                 if (defined $file_name) {
5622                         $title .= " :: $file_name";
5623                         $feed_type = 'history';
5624                 }
5625         } elsif (defined $file_name) {
5626                 $title .= " - $file_name";
5627                 $feed_type = 'history';
5628         }
5629         $title .= " $feed_type";
5630         my $descr = git_get_project_description($project);
5631         if (defined $descr) {
5632                 $descr = esc_html($descr);
5633         } else {
5634                 $descr = "$project " .
5635                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5636                          " feed";
5637         }
5638         my $owner = git_get_project_owner($project);
5639         $owner = esc_html($owner);
5640
5641         #header
5642         my $alt_url;
5643         if (defined $file_name) {
5644                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5645         } elsif (defined $hash) {
5646                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5647         } else {
5648                 $alt_url = href(-full=>1, action=>"summary");
5649         }
5650         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5651         if ($format eq 'rss') {
5652                 print <<XML;
5653 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5654 <channel>
5655 XML
5656                 print "<title>$title</title>\n" .
5657                       "<link>$alt_url</link>\n" .
5658                       "<description>$descr</description>\n" .
5659                       "<language>en</language>\n";
5660         } elsif ($format eq 'atom') {
5661                 print <<XML;
5662 <feed xmlns="http://www.w3.org/2005/Atom">
5663 XML
5664                 print "<title>$title</title>\n" .
5665                       "<subtitle>$descr</subtitle>\n" .
5666                       '<link rel="alternate" type="text/html" href="' .
5667                       $alt_url . '" />' . "\n" .
5668                       '<link rel="self" type="' . $content_type . '" href="' .
5669                       $cgi->self_url() . '" />' . "\n" .
5670                       "<id>" . href(-full=>1) . "</id>\n" .
5671                       # use project owner for feed author
5672                       "<author><name>$owner</name></author>\n";
5673                 if (defined $favicon) {
5674                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5675                 }
5676                 if (defined $logo_url) {
5677                         # not twice as wide as tall: 72 x 27 pixels
5678                         print "<logo>" . esc_url($logo) . "</logo>\n";
5679                 }
5680                 if (! %latest_date) {
5681                         # dummy date to keep the feed valid until commits trickle in:
5682                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5683                 } else {
5684                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5685                 }
5686         }
5687
5688         # contents
5689         for (my $i = 0; $i <= $#commitlist; $i++) {
5690                 my %co = %{$commitlist[$i]};
5691                 my $commit = $co{'id'};
5692                 # we read 150, we always show 30 and the ones more recent than 48 hours
5693                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5694                         last;
5695                 }
5696                 my %cd = parse_date($co{'author_epoch'});
5697
5698                 # get list of changed files
5699                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5700                         $co{'parent'} || "--root",
5701                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5702                         or next;
5703                 my @difftree = map { chomp; $_ } <$fd>;
5704                 close $fd
5705                         or next;
5706
5707                 # print element (entry, item)
5708                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5709                 if ($format eq 'rss') {
5710                         print "<item>\n" .
5711                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5712                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5713                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5714                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5715                               "<link>$co_url</link>\n" .
5716                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5717                               "<content:encoded>" .
5718                               "<![CDATA[\n";
5719                 } elsif ($format eq 'atom') {
5720                         print "<entry>\n" .
5721                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5722                               "<updated>$cd{'iso-8601'}</updated>\n" .
5723                               "<author>\n" .
5724                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5725                         if ($co{'author_email'}) {
5726                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5727                         }
5728                         print "</author>\n" .
5729                               # use committer for contributor
5730                               "<contributor>\n" .
5731                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5732                         if ($co{'committer_email'}) {
5733                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5734                         }
5735                         print "</contributor>\n" .
5736                               "<published>$cd{'iso-8601'}</published>\n" .
5737                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5738                               "<id>$co_url</id>\n" .
5739                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5740                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5741                 }
5742                 my $comment = $co{'comment'};
5743                 print "<pre>\n";
5744                 foreach my $line (@$comment) {
5745                         $line = esc_html($line);
5746                         print "$line\n";
5747                 }
5748                 print "</pre><ul>\n";
5749                 foreach my $difftree_line (@difftree) {
5750                         my %difftree = parse_difftree_raw_line($difftree_line);
5751                         next if !$difftree{'from_id'};
5752
5753                         my $file = $difftree{'file'} || $difftree{'to_file'};
5754
5755                         print "<li>" .
5756                               "[" .
5757                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5758                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5759                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5760                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5761                                       -title => "diff"}, 'D');
5762                         if ($have_blame) {
5763                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5764                                                              file_name=>$file, hash_base=>$commit),
5765                                               -title => "blame"}, 'B');
5766                         }
5767                         # if this is not a feed of a file history
5768                         if (!defined $file_name || $file_name ne $file) {
5769                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5770                                                              file_name=>$file, hash=>$commit),
5771                                               -title => "history"}, 'H');
5772                         }
5773                         $file = esc_path($file);
5774                         print "] ".
5775                               "$file</li>\n";
5776                 }
5777                 if ($format eq 'rss') {
5778                         print "</ul>]]>\n" .
5779                               "</content:encoded>\n" .
5780                               "</item>\n";
5781                 } elsif ($format eq 'atom') {
5782                         print "</ul>\n</div>\n" .
5783                               "</content>\n" .
5784                               "</entry>\n";
5785                 }
5786         }
5787
5788         # end of feed
5789         if ($format eq 'rss') {
5790                 print "</channel>\n</rss>\n";
5791         }       elsif ($format eq 'atom') {
5792                 print "</feed>\n";
5793         }
5794 }
5795
5796 sub git_rss {
5797         git_feed('rss');
5798 }
5799
5800 sub git_atom {
5801         git_feed('atom');
5802 }
5803
5804 sub git_opml {
5805         my @list = git_get_projects_list();
5806
5807         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5808         print <<XML;
5809 <?xml version="1.0" encoding="utf-8"?>
5810 <opml version="1.0">
5811 <head>
5812   <title>$site_name OPML Export</title>
5813 </head>
5814 <body>
5815 <outline text="git RSS feeds">
5816 XML
5817
5818         foreach my $pr (@list) {
5819                 my %proj = %$pr;
5820                 my $head = git_get_head_hash($proj{'path'});
5821                 if (!defined $head) {
5822                         next;
5823                 }
5824                 $git_dir = "$projectroot/$proj{'path'}";
5825                 my %co = parse_commit($head);
5826                 if (!%co) {
5827                         next;
5828                 }
5829
5830                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5831                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5832                 my $html = "$my_url?p=$proj{'path'};a=summary";
5833                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5834         }
5835         print <<XML;
5836 </outline>
5837 </body>
5838 </opml>
5839 XML
5840 }