gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 378
 379 # version of the core git binary
 380 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(undef, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(undef, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(undef, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(undef, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(undef, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(undef, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(undef, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(undef, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(undef, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(undef, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(undef, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(undef, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(undef, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_blame2,
 543         "blobdiff" => \&git_blobdiff,
 544         "blobdiff_plain" => \&git_blobdiff_plain,
 545         "blob" => \&git_blob,
 546         "blob_plain" => \&git_blob_plain,
 547         "commitdiff" => \&git_commitdiff,
 548         "commitdiff_plain" => \&git_commitdiff_plain,
 549         "commit" => \&git_commit,
 550         "forks" => \&git_forks,
 551         "heads" => \&git_heads,
 552         "history" => \&git_history,
 553         "log" => \&git_log,
 554         "rss" => \&git_rss,
 555         "atom" => \&git_atom,
 556         "search" => \&git_search,
 557         "search_help" => \&git_search_help,
 558         "shortlog" => \&git_shortlog,
 559         "summary" => \&git_summary,
 560         "tag" => \&git_tag,
 561         "tags" => \&git_tags,
 562         "tree" => \&git_tree,
 563         "snapshot" => \&git_snapshot,
 564         "object" => \&git_object,
 565         # those below don't need $project
 566         "opml" => \&git_opml,
 567         "project_list" => \&git_project_list,
 568         "project_index" => \&git_project_index,
 569 );
 570
 571 if (!defined $action) {
 572         if (defined $hash) {
 573                 $action = git_get_type($hash);
 574         } elsif (defined $hash_base && defined $file_name) {
 575                 $action = git_get_type("$hash_base:$file_name");
 576         } elsif (defined $project) {
 577                 $action = 'summary';
 578         } else {
 579                 $action = 'project_list';
 580         }
 581 }
 582 if (!defined($actions{$action})) {
 583         die_error(undef, "Unknown action");
 584 }
 585 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 586     !$project) {
 587         die_error(undef, "Project needed");
 588 }
 589 $actions{$action}->();
 590 exit;
 591
 592 ## ======================================================================
 593 ## action links
 594
 595 sub href (%) {
 596         my %params = @_;
 597         # default is to use -absolute url() i.e. $my_uri
 598         my $href = $params{-full} ? $my_url : $my_uri;
 599
 600         # XXX: Warning: If you touch this, check the search form for updating,
 601         # too.
 602
 603         my @mapping = (
 604                 project => "p",
 605                 action => "a",
 606                 file_name => "f",
 607                 file_parent => "fp",
 608                 hash => "h",
 609                 hash_parent => "hp",
 610                 hash_base => "hb",
 611                 hash_parent_base => "hpb",
 612                 page => "pg",
 613                 order => "o",
 614                 searchtext => "s",
 615                 searchtype => "st",
 616                 snapshot_format => "sf",
 617                 extra_options => "opt",
 618                 search_use_regexp => "sr",
 619         );
 620         my %mapping = @mapping;
 621
 622         $params{'project'} = $project unless exists $params{'project'};
 623
 624         if ($params{-replay}) {
 625                 while (my ($name, $symbol) = each %mapping) {
 626                         if (!exists $params{$name}) {
 627                                 # to allow for multivalued params we use arrayref form
 628                                 $params{$name} = [ $cgi->param($symbol) ];
 629                         }
 630                 }
 631         }
 632
 633         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 634         if ($use_pathinfo) {
 635                 # use PATH_INFO for project name
 636                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # 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 # returns path to the core git executable and the --git-dir parameter as string
1504 sub git_cmd_str {
1505         return join(' ', git_cmd());
1506 }
1507
1508 # get HEAD ref of given project as hash
1509 sub git_get_head_hash {
1510         my $project = shift;
1511         my $o_git_dir = $git_dir;
1512         my $retval = undef;
1513         $git_dir = "$projectroot/$project";
1514         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1515                 my $head = <$fd>;
1516                 close $fd;
1517                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1518                         $retval = $1;
1519                 }
1520         }
1521         if (defined $o_git_dir) {
1522                 $git_dir = $o_git_dir;
1523         }
1524         return $retval;
1525 }
1526
1527 # get type of given object
1528 sub git_get_type {
1529         my $hash = shift;
1530
1531         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1532         my $type = <$fd>;
1533         close $fd or return;
1534         chomp $type;
1535         return $type;
1536 }
1537
1538 # repository configuration
1539 our $config_file = '';
1540 our %config;
1541
1542 # store multiple values for single key as anonymous array reference
1543 # single values stored directly in the hash, not as [ <value> ]
1544 sub hash_set_multi {
1545         my ($hash, $key, $value) = @_;
1546
1547         if (!exists $hash->{$key}) {
1548                 $hash->{$key} = $value;
1549         } elsif (!ref $hash->{$key}) {
1550                 $hash->{$key} = [ $hash->{$key}, $value ];
1551         } else {
1552                 push @{$hash->{$key}}, $value;
1553         }
1554 }
1555
1556 # return hash of git project configuration
1557 # optionally limited to some section, e.g. 'gitweb'
1558 sub git_parse_project_config {
1559         my $section_regexp = shift;
1560         my %config;
1561
1562         local $/ = "\0";
1563
1564         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1565                 or return;
1566
1567         while (my $keyval = <$fh>) {
1568                 chomp $keyval;
1569                 my ($key, $value) = split(/\n/, $keyval, 2);
1570
1571                 hash_set_multi(\%config, $key, $value)
1572                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1573         }
1574         close $fh;
1575
1576         return %config;
1577 }
1578
1579 # convert config value to boolean, 'true' or 'false'
1580 # no value, number > 0, 'true' and 'yes' values are true
1581 # rest of values are treated as false (never as error)
1582 sub config_to_bool {
1583         my $val = shift;
1584
1585         # strip leading and trailing whitespace
1586         $val =~ s/^\s+//;
1587         $val =~ s/\s+$//;
1588
1589         return (!defined $val ||               # section.key
1590                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1591                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1592 }
1593
1594 # convert config value to simple decimal number
1595 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1596 # to be multiplied by 1024, 1048576, or 1073741824
1597 sub config_to_int {
1598         my $val = shift;
1599
1600         # strip leading and trailing whitespace
1601         $val =~ s/^\s+//;
1602         $val =~ s/\s+$//;
1603
1604         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1605                 $unit = lc($unit);
1606                 # unknown unit is treated as 1
1607                 return $num * ($unit eq 'g' ? 1073741824 :
1608                                $unit eq 'm' ?    1048576 :
1609                                $unit eq 'k' ?       1024 : 1);
1610         }
1611         return $val;
1612 }
1613
1614 # convert config value to array reference, if needed
1615 sub config_to_multi {
1616         my $val = shift;
1617
1618         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1619 }
1620
1621 sub git_get_project_config {
1622         my ($key, $type) = @_;
1623
1624         # key sanity check
1625         return unless ($key);
1626         $key =~ s/^gitweb\.//;
1627         return if ($key =~ m/\W/);
1628
1629         # type sanity check
1630         if (defined $type) {
1631                 $type =~ s/^--//;
1632                 $type = undef
1633                         unless ($type eq 'bool' || $type eq 'int');
1634         }
1635
1636         # get config
1637         if (!defined $config_file ||
1638             $config_file ne "$git_dir/config") {
1639                 %config = git_parse_project_config('gitweb');
1640                 $config_file = "$git_dir/config";
1641         }
1642
1643         # ensure given type
1644         if (!defined $type) {
1645                 return $config{"gitweb.$key"};
1646         } elsif ($type eq 'bool') {
1647                 # backward compatibility: 'git config --bool' returns true/false
1648                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1649         } elsif ($type eq 'int') {
1650                 return config_to_int($config{"gitweb.$key"});
1651         }
1652         return $config{"gitweb.$key"};
1653 }
1654
1655 # get hash of given path at given ref
1656 sub git_get_hash_by_path {
1657         my $base = shift;
1658         my $path = shift || return undef;
1659         my $type = shift;
1660
1661         $path =~ s,/+$,,;
1662
1663         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1664                 or die_error(undef, "Open git-ls-tree failed");
1665         my $line = <$fd>;
1666         close $fd or return undef;
1667
1668         if (!defined $line) {
1669                 # there is no tree or hash given by $path at $base
1670                 return undef;
1671         }
1672
1673         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1674         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1675         if (defined $type && $type ne $2) {
1676                 # type doesn't match
1677                 return undef;
1678         }
1679         return $3;
1680 }
1681
1682 # get path of entry with given hash at given tree-ish (ref)
1683 # used to get 'from' filename for combined diff (merge commit) for renames
1684 sub git_get_path_by_hash {
1685         my $base = shift || return;
1686         my $hash = shift || return;
1687
1688         local $/ = "\0";
1689
1690         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1691                 or return undef;
1692         while (my $line = <$fd>) {
1693                 chomp $line;
1694
1695                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1696                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1697                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1698                         close $fd;
1699                         return $1;
1700                 }
1701         }
1702         close $fd;
1703         return undef;
1704 }
1705
1706 ## ......................................................................
1707 ## git utility functions, directly accessing git repository
1708
1709 sub git_get_project_description {
1710         my $path = shift;
1711
1712         $git_dir = "$projectroot/$path";
1713         open my $fd, "$git_dir/description"
1714                 or return git_get_project_config('description');
1715         my $descr = <$fd>;
1716         close $fd;
1717         if (defined $descr) {
1718                 chomp $descr;
1719         }
1720         return $descr;
1721 }
1722
1723 sub git_get_project_url_list {
1724         my $path = shift;
1725
1726         $git_dir = "$projectroot/$path";
1727         open my $fd, "$git_dir/cloneurl"
1728                 or return wantarray ?
1729                 @{ config_to_multi(git_get_project_config('url')) } :
1730                    config_to_multi(git_get_project_config('url'));
1731         my @git_project_url_list = map { chomp; $_ } <$fd>;
1732         close $fd;
1733
1734         return wantarray ? @git_project_url_list : \@git_project_url_list;
1735 }
1736
1737 sub git_get_projects_list {
1738         my ($filter) = @_;
1739         my @list;
1740
1741         $filter ||= '';
1742         $filter =~ s/\.git$//;
1743
1744         my ($check_forks) = gitweb_check_feature('forks');
1745
1746         if (-d $projects_list) {
1747                 # search in directory
1748                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1749                 # remove the trailing "/"
1750                 $dir =~ s!/+$!!;
1751                 my $pfxlen = length("$dir");
1752                 my $pfxdepth = ($dir =~ tr!/!!);
1753
1754                 File::Find::find({
1755                         follow_fast => 1, # follow symbolic links
1756                         follow_skip => 2, # ignore duplicates
1757                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1758                         wanted => sub {
1759                                 # skip project-list toplevel, if we get it.
1760                                 return if (m!^[/.]$!);
1761                                 # only directories can be git repositories
1762                                 return unless (-d $_);
1763                                 # don't traverse too deep (Find is super slow on os x)
1764                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1765                                         $File::Find::prune = 1;
1766                                         return;
1767                                 }
1768
1769                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1770                                 # we check related file in $projectroot
1771                                 if ($check_forks and $subdir =~ m#/.#) {
1772                                         $File::Find::prune = 1;
1773                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1774                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1775                                         $File::Find::prune = 1;
1776                                 }
1777                         },
1778                 }, "$dir");
1779
1780         } elsif (-f $projects_list) {
1781                 # read from file(url-encoded):
1782                 # 'git%2Fgit.git Linus+Torvalds'
1783                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1784                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1785                 my %paths;
1786                 open my ($fd), $projects_list or return;
1787         PROJECT:
1788                 while (my $line = <$fd>) {
1789                         chomp $line;
1790                         my ($path, $owner) = split ' ', $line;
1791                         $path = unescape($path);
1792                         $owner = unescape($owner);
1793                         if (!defined $path) {
1794                                 next;
1795                         }
1796                         if ($filter ne '') {
1797                                 # looking for forks;
1798                                 my $pfx = substr($path, 0, length($filter));
1799                                 if ($pfx ne $filter) {
1800                                         next PROJECT;
1801                                 }
1802                                 my $sfx = substr($path, length($filter));
1803                                 if ($sfx !~ /^\/.*\.git$/) {
1804                                         next PROJECT;
1805                                 }
1806                         } elsif ($check_forks) {
1807                         PATH:
1808                                 foreach my $filter (keys %paths) {
1809                                         # looking for forks;
1810                                         my $pfx = substr($path, 0, length($filter));
1811                                         if ($pfx ne $filter) {
1812                                                 next PATH;
1813                                         }
1814                                         my $sfx = substr($path, length($filter));
1815                                         if ($sfx !~ /^\/.*\.git$/) {
1816                                                 next PATH;
1817                                         }
1818                                         # is a fork, don't include it in
1819                                         # the list
1820                                         next PROJECT;
1821                                 }
1822                         }
1823                         if (check_export_ok("$projectroot/$path")) {
1824                                 my $pr = {
1825                                         path => $path,
1826                                         owner => to_utf8($owner),
1827                                 };
1828                                 push @list, $pr;
1829                                 (my $forks_path = $path) =~ s/\.git$//;
1830                                 $paths{$forks_path}++;
1831                         }
1832                 }
1833                 close $fd;
1834         }
1835         return @list;
1836 }
1837
1838 our $gitweb_project_owner = undef;
1839 sub git_get_project_list_from_file {
1840
1841         return if (defined $gitweb_project_owner);
1842
1843         $gitweb_project_owner = {};
1844         # read from file (url-encoded):
1845         # 'git%2Fgit.git Linus+Torvalds'
1846         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1847         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1848         if (-f $projects_list) {
1849                 open (my $fd , $projects_list);
1850                 while (my $line = <$fd>) {
1851                         chomp $line;
1852                         my ($pr, $ow) = split ' ', $line;
1853                         $pr = unescape($pr);
1854                         $ow = unescape($ow);
1855                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1856                 }
1857                 close $fd;
1858         }
1859 }
1860
1861 sub git_get_project_owner {
1862         my $project = shift;
1863         my $owner;
1864
1865         return undef unless $project;
1866         $git_dir = "$projectroot/$project";
1867
1868         if (!defined $gitweb_project_owner) {
1869                 git_get_project_list_from_file();
1870         }
1871
1872         if (exists $gitweb_project_owner->{$project}) {
1873                 $owner = $gitweb_project_owner->{$project};
1874         }
1875         if (!defined $owner){
1876                 $owner = git_get_project_config('owner');
1877         }
1878         if (!defined $owner) {
1879                 $owner = get_file_owner("$git_dir");
1880         }
1881
1882         return $owner;
1883 }
1884
1885 sub git_get_last_activity {
1886         my ($path) = @_;
1887         my $fd;
1888
1889         $git_dir = "$projectroot/$path";
1890         open($fd, "-|", git_cmd(), 'for-each-ref',
1891              '--format=%(committer)',
1892              '--sort=-committerdate',
1893              '--count=1',
1894              'refs/heads') or return;
1895         my $most_recent = <$fd>;
1896         close $fd or return;
1897         if (defined $most_recent &&
1898             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1899                 my $timestamp = $1;
1900                 my $age = time - $timestamp;
1901                 return ($age, age_string($age));
1902         }
1903         return (undef, undef);
1904 }
1905
1906 sub git_get_references {
1907         my $type = shift || "";
1908         my %refs;
1909         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1910         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1911         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1912                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1913                 or return;
1914
1915         while (my $line = <$fd>) {
1916                 chomp $line;
1917                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1918                         if (defined $refs{$1}) {
1919                                 push @{$refs{$1}}, $2;
1920                         } else {
1921                                 $refs{$1} = [ $2 ];
1922                         }
1923                 }
1924         }
1925         close $fd or return;
1926         return \%refs;
1927 }
1928
1929 sub git_get_rev_name_tags {
1930         my $hash = shift || return undef;
1931
1932         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1933                 or return;
1934         my $name_rev = <$fd>;
1935         close $fd;
1936
1937         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1938                 return $1;
1939         } else {
1940                 # catches also '$hash undefined' output
1941                 return undef;
1942         }
1943 }
1944
1945 ## ----------------------------------------------------------------------
1946 ## parse to hash functions
1947
1948 sub parse_date {
1949         my $epoch = shift;
1950         my $tz = shift || "-0000";
1951
1952         my %date;
1953         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1954         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1955         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1956         $date{'hour'} = $hour;
1957         $date{'minute'} = $min;
1958         $date{'mday'} = $mday;
1959         $date{'day'} = $days[$wday];
1960         $date{'month'} = $months[$mon];
1961         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1962                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1963         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1964                              $mday, $months[$mon], $hour ,$min;
1965         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1966                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1967
1968         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1969         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1970         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1971         $date{'hour_local'} = $hour;
1972         $date{'minute_local'} = $min;
1973         $date{'tz_local'} = $tz;
1974         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1975                                   1900+$year, $mon+1, $mday,
1976                                   $hour, $min, $sec, $tz);
1977         return %date;
1978 }
1979
1980 sub parse_tag {
1981         my $tag_id = shift;
1982         my %tag;
1983         my @comment;
1984
1985         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1986         $tag{'id'} = $tag_id;
1987         while (my $line = <$fd>) {
1988                 chomp $line;
1989                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1990                         $tag{'object'} = $1;
1991                 } elsif ($line =~ m/^type (.+)$/) {
1992                         $tag{'type'} = $1;
1993                 } elsif ($line =~ m/^tag (.+)$/) {
1994                         $tag{'name'} = $1;
1995                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1996                         $tag{'author'} = $1;
1997                         $tag{'epoch'} = $2;
1998                         $tag{'tz'} = $3;
1999                 } elsif ($line =~ m/--BEGIN/) {
2000                         push @comment, $line;
2001                         last;
2002                 } elsif ($line eq "") {
2003                         last;
2004                 }
2005         }
2006         push @comment, <$fd>;
2007         $tag{'comment'} = \@comment;
2008         close $fd or return;
2009         if (!defined $tag{'name'}) {
2010                 return
2011         };
2012         return %tag
2013 }
2014
2015 sub parse_commit_text {
2016         my ($commit_text, $withparents) = @_;
2017         my @commit_lines = split '\n', $commit_text;
2018         my %co;
2019
2020         pop @commit_lines; # Remove '\0'
2021
2022         if (! @commit_lines) {
2023                 return;
2024         }
2025
2026         my $header = shift @commit_lines;
2027         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2028                 return;
2029         }
2030         ($co{'id'}, my @parents) = split ' ', $header;
2031         while (my $line = shift @commit_lines) {
2032                 last if $line eq "\n";
2033                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2034                         $co{'tree'} = $1;
2035                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2036                         push @parents, $1;
2037                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2038                         $co{'author'} = $1;
2039                         $co{'author_epoch'} = $2;
2040                         $co{'author_tz'} = $3;
2041                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2042                                 $co{'author_name'}  = $1;
2043                                 $co{'author_email'} = $2;
2044                         } else {
2045                                 $co{'author_name'} = $co{'author'};
2046                         }
2047                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2048                         $co{'committer'} = $1;
2049                         $co{'committer_epoch'} = $2;
2050                         $co{'committer_tz'} = $3;
2051                         $co{'committer_name'} = $co{'committer'};
2052                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2053                                 $co{'committer_name'}  = $1;
2054                                 $co{'committer_email'} = $2;
2055                         } else {
2056                                 $co{'committer_name'} = $co{'committer'};
2057                         }
2058                 }
2059         }
2060         if (!defined $co{'tree'}) {
2061                 return;
2062         };
2063         $co{'parents'} = \@parents;
2064         $co{'parent'} = $parents[0];
2065
2066         foreach my $title (@commit_lines) {
2067                 $title =~ s/^    //;
2068                 if ($title ne "") {
2069                         $co{'title'} = chop_str($title, 80, 5);
2070                         # remove leading stuff of merges to make the interesting part visible
2071                         if (length($title) > 50) {
2072                                 $title =~ s/^Automatic //;
2073                                 $title =~ s/^merge (of|with) /Merge ... /i;
2074                                 if (length($title) > 50) {
2075                                         $title =~ s/(http|rsync):\/\///;
2076                                 }
2077                                 if (length($title) > 50) {
2078                                         $title =~ s/(master|www|rsync)\.//;
2079                                 }
2080                                 if (length($title) > 50) {
2081                                         $title =~ s/kernel.org:?//;
2082                                 }
2083                                 if (length($title) > 50) {
2084                                         $title =~ s/\/pub\/scm//;
2085                                 }
2086                         }
2087                         $co{'title_short'} = chop_str($title, 50, 5);
2088                         last;
2089                 }
2090         }
2091         if ($co{'title'} eq "") {
2092                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2093         }
2094         # remove added spaces
2095         foreach my $line (@commit_lines) {
2096                 $line =~ s/^    //;
2097         }
2098         $co{'comment'} = \@commit_lines;
2099
2100         my $age = time - $co{'committer_epoch'};
2101         $co{'age'} = $age;
2102         $co{'age_string'} = age_string($age);
2103         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2104         if ($age > 60*60*24*7*2) {
2105                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2106                 $co{'age_string_age'} = $co{'age_string'};
2107         } else {
2108                 $co{'age_string_date'} = $co{'age_string'};
2109                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110         }
2111         return %co;
2112 }
2113
2114 sub parse_commit {
2115         my ($commit_id) = @_;
2116         my %co;
2117
2118         local $/ = "\0";
2119
2120         open my $fd, "-|", git_cmd(), "rev-list",
2121                 "--parents",
2122                 "--header",
2123                 "--max-count=1",
2124                 $commit_id,
2125                 "--",
2126                 or die_error(undef, "Open git-rev-list failed");
2127         %co = parse_commit_text(<$fd>, 1);
2128         close $fd;
2129
2130         return %co;
2131 }
2132
2133 sub parse_commits {
2134         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2135         my @cos;
2136
2137         $maxcount ||= 1;
2138         $skip ||= 0;
2139
2140         local $/ = "\0";
2141
2142         open my $fd, "-|", git_cmd(), "rev-list",
2143                 "--header",
2144                 @args,
2145                 ("--max-count=" . $maxcount),
2146                 ("--skip=" . $skip),
2147                 @extra_options,
2148                 $commit_id,
2149                 "--",
2150                 ($filename ? ($filename) : ())
2151                 or die_error(undef, "Open git-rev-list failed");
2152         while (my $line = <$fd>) {
2153                 my %co = parse_commit_text($line);
2154                 push @cos, \%co;
2155         }
2156         close $fd;
2157
2158         return wantarray ? @cos : \@cos;
2159 }
2160
2161 # parse ref from ref_file, given by ref_id, with given type
2162 sub parse_ref {
2163         my $ref_file = shift;
2164         my $ref_id = shift;
2165         my $type = shift || git_get_type($ref_id);
2166         my %ref_item;
2167
2168         $ref_item{'type'} = $type;
2169         $ref_item{'id'} = $ref_id;
2170         $ref_item{'epoch'} = 0;
2171         $ref_item{'age'} = "unknown";
2172         if ($type eq "tag") {
2173                 my %tag = parse_tag($ref_id);
2174                 $ref_item{'comment'} = $tag{'comment'};
2175                 if ($tag{'type'} eq "commit") {
2176                         my %co = parse_commit($tag{'object'});
2177                         $ref_item{'epoch'} = $co{'committer_epoch'};
2178                         $ref_item{'age'} = $co{'age_string'};
2179                 } elsif (defined($tag{'epoch'})) {
2180                         my $age = time - $tag{'epoch'};
2181                         $ref_item{'epoch'} = $tag{'epoch'};
2182                         $ref_item{'age'} = age_string($age);
2183                 }
2184                 $ref_item{'reftype'} = $tag{'type'};
2185                 $ref_item{'name'} = $tag{'name'};
2186                 $ref_item{'refid'} = $tag{'object'};
2187         } elsif ($type eq "commit"){
2188                 my %co = parse_commit($ref_id);
2189                 $ref_item{'reftype'} = "commit";
2190                 $ref_item{'name'} = $ref_file;
2191                 $ref_item{'title'} = $co{'title'};
2192                 $ref_item{'refid'} = $ref_id;
2193                 $ref_item{'epoch'} = $co{'committer_epoch'};
2194                 $ref_item{'age'} = $co{'age_string'};
2195         } else {
2196                 $ref_item{'reftype'} = $type;
2197                 $ref_item{'name'} = $ref_file;
2198                 $ref_item{'refid'} = $ref_id;
2199         }
2200
2201         return %ref_item;
2202 }
2203
2204 # parse line of git-diff-tree "raw" output
2205 sub parse_difftree_raw_line {
2206         my $line = shift;
2207         my %res;
2208
2209         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2210         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2211         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2212                 $res{'from_mode'} = $1;
2213                 $res{'to_mode'} = $2;
2214                 $res{'from_id'} = $3;
2215                 $res{'to_id'} = $4;
2216                 $res{'status'} = $5;
2217                 $res{'similarity'} = $6;
2218                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2219                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2220                 } else {
2221                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2222                 }
2223         }
2224         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2225         # combined diff (for merge commit)
2226         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2227                 $res{'nparents'}  = length($1);
2228                 $res{'from_mode'} = [ split(' ', $2) ];
2229                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2230                 $res{'from_id'} = [ split(' ', $3) ];
2231                 $res{'to_id'} = pop @{$res{'from_id'}};
2232                 $res{'status'} = [ split('', $4) ];
2233                 $res{'to_file'} = unquote($5);
2234         }
2235         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2236         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2237                 $res{'commit'} = $1;
2238         }
2239
2240         return wantarray ? %res : \%res;
2241 }
2242
2243 # wrapper: return parsed line of git-diff-tree "raw" output
2244 # (the argument might be raw line, or parsed info)
2245 sub parsed_difftree_line {
2246         my $line_or_ref = shift;
2247
2248         if (ref($line_or_ref) eq "HASH") {
2249                 # pre-parsed (or generated by hand)
2250                 return $line_or_ref;
2251         } else {
2252                 return parse_difftree_raw_line($line_or_ref);
2253         }
2254 }
2255
2256 # parse line of git-ls-tree output
2257 sub parse_ls_tree_line ($;%) {
2258         my $line = shift;
2259         my %opts = @_;
2260         my %res;
2261
2262         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2263         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2264
2265         $res{'mode'} = $1;
2266         $res{'type'} = $2;
2267         $res{'hash'} = $3;
2268         if ($opts{'-z'}) {
2269                 $res{'name'} = $4;
2270         } else {
2271                 $res{'name'} = unquote($4);
2272         }
2273
2274         return wantarray ? %res : \%res;
2275 }
2276
2277 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2278 sub parse_from_to_diffinfo {
2279         my ($diffinfo, $from, $to, @parents) = @_;
2280
2281         if ($diffinfo->{'nparents'}) {
2282                 # combined diff
2283                 $from->{'file'} = [];
2284                 $from->{'href'} = [];
2285                 fill_from_file_info($diffinfo, @parents)
2286                         unless exists $diffinfo->{'from_file'};
2287                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2288                         $from->{'file'}[$i] =
2289                                 defined $diffinfo->{'from_file'}[$i] ?
2290                                         $diffinfo->{'from_file'}[$i] :
2291                                         $diffinfo->{'to_file'};
2292                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2293                                 $from->{'href'}[$i] = href(action=>"blob",
2294                                                            hash_base=>$parents[$i],
2295                                                            hash=>$diffinfo->{'from_id'}[$i],
2296                                                            file_name=>$from->{'file'}[$i]);
2297                         } else {
2298                                 $from->{'href'}[$i] = undef;
2299                         }
2300                 }
2301         } else {
2302                 # ordinary (not combined) diff
2303                 $from->{'file'} = $diffinfo->{'from_file'};
2304                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2305                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2306                                                hash=>$diffinfo->{'from_id'},
2307                                                file_name=>$from->{'file'});
2308                 } else {
2309                         delete $from->{'href'};
2310                 }
2311         }
2312
2313         $to->{'file'} = $diffinfo->{'to_file'};
2314         if (!is_deleted($diffinfo)) { # file exists in result
2315                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2316                                      hash=>$diffinfo->{'to_id'},
2317                                      file_name=>$to->{'file'});
2318         } else {
2319                 delete $to->{'href'};
2320         }
2321 }
2322
2323 ## ......................................................................
2324 ## parse to array of hashes functions
2325
2326 sub git_get_heads_list {
2327         my $limit = shift;
2328         my @headslist;
2329
2330         open my $fd, '-|', git_cmd(), 'for-each-ref',
2331                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2332                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2333                 'refs/heads'
2334                 or return;
2335         while (my $line = <$fd>) {
2336                 my %ref_item;
2337
2338                 chomp $line;
2339                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2340                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2341                 my ($committer, $epoch, $tz) =
2342                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2343                 $ref_item{'fullname'}  = $name;
2344                 $name =~ s!^refs/heads/!!;
2345
2346                 $ref_item{'name'}  = $name;
2347                 $ref_item{'id'}    = $hash;
2348                 $ref_item{'title'} = $title || '(no commit message)';
2349                 $ref_item{'epoch'} = $epoch;
2350                 if ($epoch) {
2351                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2352                 } else {
2353                         $ref_item{'age'} = "unknown";
2354                 }
2355
2356                 push @headslist, \%ref_item;
2357         }
2358         close $fd;
2359
2360         return wantarray ? @headslist : \@headslist;
2361 }
2362
2363 sub git_get_tags_list {
2364         my $limit = shift;
2365         my @tagslist;
2366
2367         open my $fd, '-|', git_cmd(), 'for-each-ref',
2368                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2369                 '--format=%(objectname) %(objecttype) %(refname) '.
2370                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2371                 'refs/tags'
2372                 or return;
2373         while (my $line = <$fd>) {
2374                 my %ref_item;
2375
2376                 chomp $line;
2377                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2378                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2379                 my ($creator, $epoch, $tz) =
2380                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2381                 $ref_item{'fullname'} = $name;
2382                 $name =~ s!^refs/tags/!!;
2383
2384                 $ref_item{'type'} = $type;
2385                 $ref_item{'id'} = $id;
2386                 $ref_item{'name'} = $name;
2387                 if ($type eq "tag") {
2388                         $ref_item{'subject'} = $title;
2389                         $ref_item{'reftype'} = $reftype;
2390                         $ref_item{'refid'}   = $refid;
2391                 } else {
2392                         $ref_item{'reftype'} = $type;
2393                         $ref_item{'refid'}   = $id;
2394                 }
2395
2396                 if ($type eq "tag" || $type eq "commit") {
2397                         $ref_item{'epoch'} = $epoch;
2398                         if ($epoch) {
2399                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2400                         } else {
2401                                 $ref_item{'age'} = "unknown";
2402                         }
2403                 }
2404
2405                 push @tagslist, \%ref_item;
2406         }
2407         close $fd;
2408
2409         return wantarray ? @tagslist : \@tagslist;
2410 }
2411
2412 ## ----------------------------------------------------------------------
2413 ## filesystem-related functions
2414
2415 sub get_file_owner {
2416         my $path = shift;
2417
2418         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2419         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2420         if (!defined $gcos) {
2421                 return undef;
2422         }
2423         my $owner = $gcos;
2424         $owner =~ s/[,;].*$//;
2425         return to_utf8($owner);
2426 }
2427
2428 ## ......................................................................
2429 ## mimetype related functions
2430
2431 sub mimetype_guess_file {
2432         my $filename = shift;
2433         my $mimemap = shift;
2434         -r $mimemap or return undef;
2435
2436         my %mimemap;
2437         open(MIME, $mimemap) or return undef;
2438         while (<MIME>) {
2439                 next if m/^#/; # skip comments
2440                 my ($mime, $exts) = split(/\t+/);
2441                 if (defined $exts) {
2442                         my @exts = split(/\s+/, $exts);
2443                         foreach my $ext (@exts) {
2444                                 $mimemap{$ext} = $mime;
2445                         }
2446                 }
2447         }
2448         close(MIME);
2449
2450         $filename =~ /\.([^.]*)$/;
2451         return $mimemap{$1};
2452 }
2453
2454 sub mimetype_guess {
2455         my $filename = shift;
2456         my $mime;
2457         $filename =~ /\./ or return undef;
2458
2459         if ($mimetypes_file) {
2460                 my $file = $mimetypes_file;
2461                 if ($file !~ m!^/!) { # if it is relative path
2462                         # it is relative to project
2463                         $file = "$projectroot/$project/$file";
2464                 }
2465                 $mime = mimetype_guess_file($filename, $file);
2466         }
2467         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2468         return $mime;
2469 }
2470
2471 sub blob_mimetype {
2472         my $fd = shift;
2473         my $filename = shift;
2474
2475         if ($filename) {
2476                 my $mime = mimetype_guess($filename);
2477                 $mime and return $mime;
2478         }
2479
2480         # just in case
2481         return $default_blob_plain_mimetype unless $fd;
2482
2483         if (-T $fd) {
2484                 return 'text/plain';
2485         } elsif (! $filename) {
2486                 return 'application/octet-stream';
2487         } elsif ($filename =~ m/\.png$/i) {
2488                 return 'image/png';
2489         } elsif ($filename =~ m/\.gif$/i) {
2490                 return 'image/gif';
2491         } elsif ($filename =~ m/\.jpe?g$/i) {
2492                 return 'image/jpeg';
2493         } else {
2494                 return 'application/octet-stream';
2495         }
2496 }
2497
2498 sub blob_contenttype {
2499         my ($fd, $file_name, $type) = @_;
2500
2501         $type ||= blob_mimetype($fd, $file_name);
2502         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2503                 $type .= "; charset=$default_text_plain_charset";
2504         }
2505
2506         return $type;
2507 }
2508
2509 ## ======================================================================
2510 ## functions printing HTML: header, footer, error page
2511
2512 sub git_header_html {
2513         my $status = shift || "200 OK";
2514         my $expires = shift;
2515
2516         my $title = "$site_name";
2517         if (defined $project) {
2518                 $title .= " - " . to_utf8($project);
2519                 if (defined $action) {
2520                         $title .= "/$action";
2521                         if (defined $file_name) {
2522                                 $title .= " - " . esc_path($file_name);
2523                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2524                                         $title .= "/";
2525                                 }
2526                         }
2527                 }
2528         }
2529         my $content_type;
2530         # require explicit support from the UA if we are to send the page as
2531         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2532         # we have to do this because MSIE sometimes globs '*/*', pretending to
2533         # support xhtml+xml but choking when it gets what it asked for.
2534         if (defined $cgi->http('HTTP_ACCEPT') &&
2535             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2536             $cgi->Accept('application/xhtml+xml') != 0) {
2537                 $content_type = 'application/xhtml+xml';
2538         } else {
2539                 $content_type = 'text/html';
2540         }
2541         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2542                            -status=> $status, -expires => $expires);
2543         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2544         print <<EOF;
2545 <?xml version="1.0" encoding="utf-8"?>
2546 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2547 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2548 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2549 <!-- git core binaries version $git_version -->
2550 <head>
2551 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2552 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2553 <meta name="robots" content="index, nofollow"/>
2554 <title>$title</title>
2555 EOF
2556 # print out each stylesheet that exist
2557         if (defined $stylesheet) {
2558 #provides backwards capability for those people who define style sheet in a config file
2559                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2560         } else {
2561                 foreach my $stylesheet (@stylesheets) {
2562                         next unless $stylesheet;
2563                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2564                 }
2565         }
2566         if (defined $project) {
2567                 my %href_params = get_feed_info();
2568                 if (!exists $href_params{'-title'}) {
2569                         $href_params{'-title'} = 'log';
2570                 }
2571
2572                 foreach my $format qw(RSS Atom) {
2573                         my $type = lc($format);
2574                         my %link_attr = (
2575                                 '-rel' => 'alternate',
2576                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2577                                 '-type' => "application/$type+xml"
2578                         );
2579
2580                         $href_params{'action'} = $type;
2581                         $link_attr{'-href'} = href(%href_params);
2582                         print "<link ".
2583                               "rel=\"$link_attr{'-rel'}\" ".
2584                               "title=\"$link_attr{'-title'}\" ".
2585                               "href=\"$link_attr{'-href'}\" ".
2586                               "type=\"$link_attr{'-type'}\" ".
2587                               "/>\n";
2588
2589                         $href_params{'extra_options'} = '--no-merges';
2590                         $link_attr{'-href'} = href(%href_params);
2591                         $link_attr{'-title'} .= ' (no merges)';
2592                         print "<link ".
2593                               "rel=\"$link_attr{'-rel'}\" ".
2594                               "title=\"$link_attr{'-title'}\" ".
2595                               "href=\"$link_attr{'-href'}\" ".
2596                               "type=\"$link_attr{'-type'}\" ".
2597                               "/>\n";
2598                 }
2599
2600         } else {
2601                 printf('<link rel="alternate" title="%s projects list" '.
2602                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2603                        $site_name, href(project=>undef, action=>"project_index"));
2604                 printf('<link rel="alternate" title="%s projects feeds" '.
2605                        'href="%s" type="text/x-opml" />'."\n",
2606                        $site_name, href(project=>undef, action=>"opml"));
2607         }
2608         if (defined $favicon) {
2609                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2610         }
2611
2612         print "</head>\n" .
2613               "<body>\n";
2614
2615         if (-f $site_header) {
2616                 open (my $fd, $site_header);
2617                 print <$fd>;
2618                 close $fd;
2619         }
2620
2621         print "<div class=\"page_header\">\n" .
2622               $cgi->a({-href => esc_url($logo_url),
2623                        -title => $logo_label},
2624                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2625         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2626         if (defined $project) {
2627                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2628                 if (defined $action) {
2629                         print " / $action";
2630                 }
2631                 print "\n";
2632         }
2633         print "</div>\n";
2634
2635         my ($have_search) = gitweb_check_feature('search');
2636         if (defined $project && $have_search) {
2637                 if (!defined $searchtext) {
2638                         $searchtext = "";
2639                 }
2640                 my $search_hash;
2641                 if (defined $hash_base) {
2642                         $search_hash = $hash_base;
2643                 } elsif (defined $hash) {
2644                         $search_hash = $hash;
2645                 } else {
2646                         $search_hash = "HEAD";
2647                 }
2648                 my $action = $my_uri;
2649                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2650                 if ($use_pathinfo) {
2651                         $action .= "/".esc_url($project);
2652                 }
2653                 print $cgi->startform(-method => "get", -action => $action) .
2654                       "<div class=\"search\">\n" .
2655                       (!$use_pathinfo &&
2656                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2657                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2658                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2659                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2660                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2661                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2662                       " search:\n",
2663                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2664                       "<span title=\"Extended regular expression\">" .
2665                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2666                                      -checked => $search_use_regexp) .
2667                       "</span>" .
2668                       "</div>" .
2669                       $cgi->end_form() . "\n";
2670         }
2671 }
2672
2673 sub git_footer_html {
2674         my $feed_class = 'rss_logo';
2675
2676         print "<div class=\"page_footer\">\n";
2677         if (defined $project) {
2678                 my $descr = git_get_project_description($project);
2679                 if (defined $descr) {
2680                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2681                 }
2682
2683                 my %href_params = get_feed_info();
2684                 if (!%href_params) {
2685                         $feed_class .= ' generic';
2686                 }
2687                 $href_params{'-title'} ||= 'log';
2688
2689                 foreach my $format qw(RSS Atom) {
2690                         $href_params{'action'} = lc($format);
2691                         print $cgi->a({-href => href(%href_params),
2692                                       -title => "$href_params{'-title'} $format feed",
2693                                       -class => $feed_class}, $format)."\n";
2694                 }
2695
2696         } else {
2697                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2698                               -class => $feed_class}, "OPML") . " ";
2699                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2700                               -class => $feed_class}, "TXT") . "\n";
2701         }
2702         print "</div>\n"; # class="page_footer"
2703
2704         if (-f $site_footer) {
2705                 open (my $fd, $site_footer);
2706                 print <$fd>;
2707                 close $fd;
2708         }
2709
2710         print "</body>\n" .
2711               "</html>";
2712 }
2713
2714 sub die_error {
2715         my $status = shift || "403 Forbidden";
2716         my $error = shift || "Malformed query, file missing or permission denied";
2717
2718         git_header_html($status);
2719         print <<EOF;
2720 <div class="page_body">
2721 <br /><br />
2722 $status - $error
2723 <br />
2724 </div>
2725 EOF
2726         git_footer_html();
2727         exit;
2728 }
2729
2730 ## ----------------------------------------------------------------------
2731 ## functions printing or outputting HTML: navigation
2732
2733 sub git_print_page_nav {
2734         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2735         $extra = '' if !defined $extra; # pager or formats
2736
2737         my @navs = qw(summary shortlog log commit commitdiff tree);
2738         if ($suppress) {
2739                 @navs = grep { $_ ne $suppress } @navs;
2740         }
2741
2742         my %arg = map { $_ => {action=>$_} } @navs;
2743         if (defined $head) {
2744                 for (qw(commit commitdiff)) {
2745                         $arg{$_}{'hash'} = $head;
2746                 }
2747                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2748                         for (qw(shortlog log)) {
2749                                 $arg{$_}{'hash'} = $head;
2750                         }
2751                 }
2752         }
2753         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2754         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2755
2756         print "<div class=\"page_nav\">\n" .
2757                 (join " | ",
2758                  map { $_ eq $current ?
2759                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2760                  } @navs);
2761         print "<br/>\n$extra<br/>\n" .
2762               "</div>\n";
2763 }
2764
2765 sub format_paging_nav {
2766         my ($action, $hash, $head, $page, $has_next_link) = @_;
2767         my $paging_nav;
2768
2769
2770         if ($hash ne $head || $page) {
2771                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2772         } else {
2773                 $paging_nav .= "HEAD";
2774         }
2775
2776         if ($page > 0) {
2777                 $paging_nav .= " &sdot; " .
2778                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2779                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2780         } else {
2781                 $paging_nav .= " &sdot; prev";
2782         }
2783
2784         if ($has_next_link) {
2785                 $paging_nav .= " &sdot; " .
2786                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2787                                  -accesskey => "n", -title => "Alt-n"}, "next");
2788         } else {
2789                 $paging_nav .= " &sdot; next";
2790         }
2791
2792         return $paging_nav;
2793 }
2794
2795 ## ......................................................................
2796 ## functions printing or outputting HTML: div
2797
2798 sub git_print_header_div {
2799         my ($action, $title, $hash, $hash_base) = @_;
2800         my %args = ();
2801
2802         $args{'action'} = $action;
2803         $args{'hash'} = $hash if $hash;
2804         $args{'hash_base'} = $hash_base if $hash_base;
2805
2806         print "<div class=\"header\">\n" .
2807               $cgi->a({-href => href(%args), -class => "title"},
2808               $title ? $title : $action) .
2809               "\n</div>\n";
2810 }
2811
2812 #sub git_print_authorship (\%) {
2813 sub git_print_authorship {
2814         my $co = shift;
2815
2816         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2817         print "<div class=\"author_date\">" .
2818               esc_html($co->{'author_name'}) .
2819               " [$ad{'rfc2822'}";
2820         if ($ad{'hour_local'} < 6) {
2821                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2822                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2823         } else {
2824                 printf(" (%02d:%02d %s)",
2825                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2826         }
2827         print "]</div>\n";
2828 }
2829
2830 sub git_print_page_path {
2831         my $name = shift;
2832         my $type = shift;
2833         my $hb = shift;
2834
2835
2836         print "<div class=\"page_path\">";
2837         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2838                       -title => 'tree root'}, to_utf8("[$project]"));
2839         print " / ";
2840         if (defined $name) {
2841                 my @dirname = split '/', $name;
2842                 my $basename = pop @dirname;
2843                 my $fullname = '';
2844
2845                 foreach my $dir (@dirname) {
2846                         $fullname .= ($fullname ? '/' : '') . $dir;
2847                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2848                                                      hash_base=>$hb),
2849                                       -title => $fullname}, esc_path($dir));
2850                         print " / ";
2851                 }
2852                 if (defined $type && $type eq 'blob') {
2853                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2854                                                      hash_base=>$hb),
2855                                       -title => $name}, esc_path($basename));
2856                 } elsif (defined $type && $type eq 'tree') {
2857                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2858                                                      hash_base=>$hb),
2859                                       -title => $name}, esc_path($basename));
2860                         print " / ";
2861                 } else {
2862                         print esc_path($basename);
2863                 }
2864         }
2865         print "<br/></div>\n";
2866 }
2867
2868 # sub git_print_log (\@;%) {
2869 sub git_print_log ($;%) {
2870         my $log = shift;
2871         my %opts = @_;
2872
2873         if ($opts{'-remove_title'}) {
2874                 # remove title, i.e. first line of log
2875                 shift @$log;
2876         }
2877         # remove leading empty lines
2878         while (defined $log->[0] && $log->[0] eq "") {
2879                 shift @$log;
2880         }
2881
2882         # print log
2883         my $signoff = 0;
2884         my $empty = 0;
2885         foreach my $line (@$log) {
2886                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2887                         $signoff = 1;
2888                         $empty = 0;
2889                         if (! $opts{'-remove_signoff'}) {
2890                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2891                                 next;
2892                         } else {
2893                                 # remove signoff lines
2894                                 next;
2895                         }
2896                 } else {
2897                         $signoff = 0;
2898                 }
2899
2900                 # print only one empty line
2901                 # do not print empty line after signoff
2902                 if ($line eq "") {
2903                         next if ($empty || $signoff);
2904                         $empty = 1;
2905                 } else {
2906                         $empty = 0;
2907                 }
2908
2909                 print format_log_line_html($line) . "<br/>\n";
2910         }
2911
2912         if ($opts{'-final_empty_line'}) {
2913                 # end with single empty line
2914                 print "<br/>\n" unless $empty;
2915         }
2916 }
2917
2918 # return link target (what link points to)
2919 sub git_get_link_target {
2920         my $hash = shift;
2921         my $link_target;
2922
2923         # read link
2924         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2925                 or return;
2926         {
2927                 local $/;
2928                 $link_target = <$fd>;
2929         }
2930         close $fd
2931                 or return;
2932
2933         return $link_target;
2934 }
2935
2936 # given link target, and the directory (basedir) the link is in,
2937 # return target of link relative to top directory (top tree);
2938 # return undef if it is not possible (including absolute links).
2939 sub normalize_link_target {
2940         my ($link_target, $basedir, $hash_base) = @_;
2941
2942         # we can normalize symlink target only if $hash_base is provided
2943         return unless $hash_base;
2944
2945         # absolute symlinks (beginning with '/') cannot be normalized
2946         return if (substr($link_target, 0, 1) eq '/');
2947
2948         # normalize link target to path from top (root) tree (dir)
2949         my $path;
2950         if ($basedir) {
2951                 $path = $basedir . '/' . $link_target;
2952         } else {
2953                 # we are in top (root) tree (dir)
2954                 $path = $link_target;
2955         }
2956
2957         # remove //, /./, and /../
2958         my @path_parts;
2959         foreach my $part (split('/', $path)) {
2960                 # discard '.' and ''
2961                 next if (!$part || $part eq '.');
2962                 # handle '..'
2963                 if ($part eq '..') {
2964                         if (@path_parts) {
2965                                 pop @path_parts;
2966                         } else {
2967                                 # link leads outside repository (outside top dir)
2968                                 return;
2969                         }
2970                 } else {
2971                         push @path_parts, $part;
2972                 }
2973         }
2974         $path = join('/', @path_parts);
2975
2976         return $path;
2977 }
2978
2979 # print tree entry (row of git_tree), but without encompassing <tr> element
2980 sub git_print_tree_entry {
2981         my ($t, $basedir, $hash_base, $have_blame) = @_;
2982
2983         my %base_key = ();
2984         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2985
2986         # The format of a table row is: mode list link.  Where mode is
2987         # the mode of the entry, list is the name of the entry, an href,
2988         # and link is the action links of the entry.
2989
2990         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2991         if ($t->{'type'} eq "blob") {
2992                 print "<td class=\"list\">" .
2993                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2994                                                file_name=>"$basedir$t->{'name'}", %base_key),
2995                                 -class => "list"}, esc_path($t->{'name'}));
2996                 if (S_ISLNK(oct $t->{'mode'})) {
2997                         my $link_target = git_get_link_target($t->{'hash'});
2998                         if ($link_target) {
2999                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3000                                 if (defined $norm_target) {
3001                                         print " -> " .
3002                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3003                                                                      file_name=>$norm_target),
3004                                                        -title => $norm_target}, esc_path($link_target));
3005                                 } else {
3006                                         print " -> " . esc_path($link_target);
3007                                 }
3008                         }
3009                 }
3010                 print "</td>\n";
3011                 print "<td class=\"link\">";
3012                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3013                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3014                               "blob");
3015                 if ($have_blame) {
3016                         print " | " .
3017                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3018                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3019                                       "blame");
3020                 }
3021                 if (defined $hash_base) {
3022                         print " | " .
3023                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3024                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3025                                       "history");
3026                 }
3027                 print " | " .
3028                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3029                                                file_name=>"$basedir$t->{'name'}")},
3030                                 "raw");
3031                 print "</td>\n";
3032
3033         } elsif ($t->{'type'} eq "tree") {
3034                 print "<td class=\"list\">";
3035                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3036                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3037                               esc_path($t->{'name'}));
3038                 print "</td>\n";
3039                 print "<td class=\"link\">";
3040                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3041                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3042                               "tree");
3043                 if (defined $hash_base) {
3044                         print " | " .
3045                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3046                                                      file_name=>"$basedir$t->{'name'}")},
3047                                       "history");
3048                 }
3049                 print "</td>\n";
3050         } else {
3051                 # unknown object: we can only present history for it
3052                 # (this includes 'commit' object, i.e. submodule support)
3053                 print "<td class=\"list\">" .
3054                       esc_path($t->{'name'}) .
3055                       "</td>\n";
3056                 print "<td class=\"link\">";
3057                 if (defined $hash_base) {
3058                         print $cgi->a({-href => href(action=>"history",
3059                                                      hash_base=>$hash_base,
3060                                                      file_name=>"$basedir$t->{'name'}")},
3061                                       "history");
3062                 }
3063                 print "</td>\n";
3064         }
3065 }
3066
3067 ## ......................................................................
3068 ## functions printing large fragments of HTML
3069
3070 # get pre-image filenames for merge (combined) diff
3071 sub fill_from_file_info {
3072         my ($diff, @parents) = @_;
3073
3074         $diff->{'from_file'} = [ ];
3075         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3076         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3077                 if ($diff->{'status'}[$i] eq 'R' ||
3078                     $diff->{'status'}[$i] eq 'C') {
3079                         $diff->{'from_file'}[$i] =
3080                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3081                 }
3082         }
3083
3084         return $diff;
3085 }
3086
3087 # is current raw difftree line of file deletion
3088 sub is_deleted {
3089         my $diffinfo = shift;
3090
3091         return $diffinfo->{'to_id'} eq ('0' x 40);
3092 }
3093
3094 # does patch correspond to [previous] difftree raw line
3095 # $diffinfo  - hashref of parsed raw diff format
3096 # $patchinfo - hashref of parsed patch diff format
3097 #              (the same keys as in $diffinfo)
3098 sub is_patch_split {
3099         my ($diffinfo, $patchinfo) = @_;
3100
3101         return defined $diffinfo && defined $patchinfo
3102                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3103 }
3104
3105
3106 sub git_difftree_body {
3107         my ($difftree, $hash, @parents) = @_;
3108         my ($parent) = $parents[0];
3109         my ($have_blame) = gitweb_check_feature('blame');
3110         print "<div class=\"list_head\">\n";
3111         if ($#{$difftree} > 10) {
3112                 print(($#{$difftree} + 1) . " files changed:\n");
3113         }
3114         print "</div>\n";
3115
3116         print "<table class=\"" .
3117               (@parents > 1 ? "combined " : "") .
3118               "diff_tree\">\n";
3119
3120         # header only for combined diff in 'commitdiff' view
3121         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3122         if ($has_header) {
3123                 # table header
3124                 print "<thead><tr>\n" .
3125                        "<th></th><th></th>\n"; # filename, patchN link
3126                 for (my $i = 0; $i < @parents; $i++) {
3127                         my $par = $parents[$i];
3128                         print "<th>" .
3129                               $cgi->a({-href => href(action=>"commitdiff",
3130                                                      hash=>$hash, hash_parent=>$par),
3131                                        -title => 'commitdiff to parent number ' .
3132                                                   ($i+1) . ': ' . substr($par,0,7)},
3133                                       $i+1) .
3134                               "&nbsp;</th>\n";
3135                 }
3136                 print "</tr></thead>\n<tbody>\n";
3137         }
3138
3139         my $alternate = 1;
3140         my $patchno = 0;
3141         foreach my $line (@{$difftree}) {
3142                 my $diff = parsed_difftree_line($line);
3143
3144                 if ($alternate) {
3145                         print "<tr class=\"dark\">\n";
3146                 } else {
3147                         print "<tr class=\"light\">\n";
3148                 }
3149                 $alternate ^= 1;
3150
3151                 if (exists $diff->{'nparents'}) { # combined diff
3152
3153                         fill_from_file_info($diff, @parents)
3154                                 unless exists $diff->{'from_file'};
3155
3156                         if (!is_deleted($diff)) {
3157                                 # file exists in the result (child) commit
3158                                 print "<td>" .
3159                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3160                                                              file_name=>$diff->{'to_file'},
3161                                                              hash_base=>$hash),
3162                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3163                                       "</td>\n";
3164                         } else {
3165                                 print "<td>" .
3166                                       esc_path($diff->{'to_file'}) .
3167                                       "</td>\n";
3168                         }
3169
3170                         if ($action eq 'commitdiff') {
3171                                 # link to patch
3172                                 $patchno++;
3173                                 print "<td class=\"link\">" .
3174                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3175                                       " | " .
3176                                       "</td>\n";
3177                         }
3178
3179                         my $has_history = 0;
3180                         my $not_deleted = 0;
3181                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3182                                 my $hash_parent = $parents[$i];
3183                                 my $from_hash = $diff->{'from_id'}[$i];
3184                                 my $from_path = $diff->{'from_file'}[$i];
3185                                 my $status = $diff->{'status'}[$i];
3186
3187                                 $has_history ||= ($status ne 'A');
3188                                 $not_deleted ||= ($status ne 'D');
3189
3190                                 if ($status eq 'A') {
3191                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3192                                 } elsif ($status eq 'D') {
3193                                         print "<td class=\"link\">" .
3194                                               $cgi->a({-href => href(action=>"blob",
3195                                                                      hash_base=>$hash,
3196                                                                      hash=>$from_hash,
3197                                                                      file_name=>$from_path)},
3198                                                       "blob" . ($i+1)) .
3199                                               " | </td>\n";
3200                                 } else {
3201                                         if ($diff->{'to_id'} eq $from_hash) {
3202                                                 print "<td class=\"link nochange\">";
3203                                         } else {
3204                                                 print "<td class=\"link\">";
3205                                         }
3206                                         print $cgi->a({-href => href(action=>"blobdiff",
3207                                                                      hash=>$diff->{'to_id'},
3208                                                                      hash_parent=>$from_hash,
3209                                                                      hash_base=>$hash,
3210                                                                      hash_parent_base=>$hash_parent,
3211                                                                      file_name=>$diff->{'to_file'},
3212                                                                      file_parent=>$from_path)},
3213                                                       "diff" . ($i+1)) .
3214                                               " | </td>\n";
3215                                 }
3216                         }
3217
3218                         print "<td class=\"link\">";
3219                         if ($not_deleted) {
3220                                 print $cgi->a({-href => href(action=>"blob",
3221                                                              hash=>$diff->{'to_id'},
3222                                                              file_name=>$diff->{'to_file'},
3223                                                              hash_base=>$hash)},
3224                                               "blob");
3225                                 print " | " if ($has_history);
3226                         }
3227                         if ($has_history) {
3228                                 print $cgi->a({-href => href(action=>"history",
3229                                                              file_name=>$diff->{'to_file'},
3230                                                              hash_base=>$hash)},
3231                                               "history");
3232                         }
3233                         print "</td>\n";
3234
3235                         print "</tr>\n";
3236                         next; # instead of 'else' clause, to avoid extra indent
3237                 }
3238                 # else ordinary diff
3239
3240                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3241                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3242                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3243                         $to_mode_oct = oct $diff->{'to_mode'};
3244                         if (S_ISREG($to_mode_oct)) { # only for regular file
3245                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3246                         }
3247                         $to_file_type = file_type($diff->{'to_mode'});
3248                 }
3249                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3250                         $from_mode_oct = oct $diff->{'from_mode'};
3251                         if (S_ISREG($to_mode_oct)) { # only for regular file
3252                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3253                         }
3254                         $from_file_type = file_type($diff->{'from_mode'});
3255                 }
3256
3257                 if ($diff->{'status'} eq "A") { # created
3258                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3259                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3260                         $mode_chng   .= "]</span>";
3261                         print "<td>";
3262                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3263                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3264                                       -class => "list"}, esc_path($diff->{'file'}));
3265                         print "</td>\n";
3266                         print "<td>$mode_chng</td>\n";
3267                         print "<td class=\"link\">";
3268                         if ($action eq 'commitdiff') {
3269                                 # link to patch
3270                                 $patchno++;
3271                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3272                                 print " | ";
3273                         }
3274                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3275                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3276                                       "blob");
3277                         print "</td>\n";
3278
3279                 } elsif ($diff->{'status'} eq "D") { # deleted
3280                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3281                         print "<td>";
3282                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3283                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3284                                        -class => "list"}, esc_path($diff->{'file'}));
3285                         print "</td>\n";
3286                         print "<td>$mode_chng</td>\n";
3287                         print "<td class=\"link\">";
3288                         if ($action eq 'commitdiff') {
3289                                 # link to patch
3290                                 $patchno++;
3291                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3292                                 print " | ";
3293                         }
3294                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3295                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3296                                       "blob") . " | ";
3297                         if ($have_blame) {
3298                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3299                                                              file_name=>$diff->{'file'})},
3300                                               "blame") . " | ";
3301                         }
3302                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3303                                                      file_name=>$diff->{'file'})},
3304                                       "history");
3305                         print "</td>\n";
3306
3307                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3308                         my $mode_chnge = "";
3309                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3310                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3311                                 if ($from_file_type ne $to_file_type) {
3312                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3313                                 }
3314                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3315                                         if ($from_mode_str && $to_mode_str) {
3316                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3317                                         } elsif ($to_mode_str) {
3318                                                 $mode_chnge .= " mode: $to_mode_str";
3319                                         }
3320                                 }
3321                                 $mode_chnge .= "]</span>\n";
3322                         }
3323                         print "<td>";
3324                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3325                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3326                                       -class => "list"}, esc_path($diff->{'file'}));
3327                         print "</td>\n";
3328                         print "<td>$mode_chnge</td>\n";
3329                         print "<td class=\"link\">";
3330                         if ($action eq 'commitdiff') {
3331                                 # link to patch
3332                                 $patchno++;
3333                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3334                                       " | ";
3335                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3336                                 # "commit" view and modified file (not onlu mode changed)
3337                                 print $cgi->a({-href => href(action=>"blobdiff",
3338                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3339                                                              hash_base=>$hash, hash_parent_base=>$parent,
3340                                                              file_name=>$diff->{'file'})},
3341                                               "diff") .
3342                                       " | ";
3343                         }
3344                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3345                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3346                                        "blob") . " | ";
3347                         if ($have_blame) {
3348                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3349                                                              file_name=>$diff->{'file'})},
3350                                               "blame") . " | ";
3351                         }
3352                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3353                                                      file_name=>$diff->{'file'})},
3354                                       "history");
3355                         print "</td>\n";
3356
3357                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3358                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3359                         my $nstatus = $status_name{$diff->{'status'}};
3360                         my $mode_chng = "";
3361                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3362                                 # mode also for directories, so we cannot use $to_mode_str
3363                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3364                         }
3365                         print "<td>" .
3366                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3367                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3368                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3369                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3370                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3371                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3372                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3373                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3374                               "<td class=\"link\">";
3375                         if ($action eq 'commitdiff') {
3376                                 # link to patch
3377                                 $patchno++;
3378                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3379                                       " | ";
3380                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3381                                 # "commit" view and modified file (not only pure rename or copy)
3382                                 print $cgi->a({-href => href(action=>"blobdiff",
3383                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3384                                                              hash_base=>$hash, hash_parent_base=>$parent,
3385                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3386                                               "diff") .
3387                                       " | ";
3388                         }
3389                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3390                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3391                                       "blob") . " | ";
3392                         if ($have_blame) {
3393                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3394                                                              file_name=>$diff->{'to_file'})},
3395                                               "blame") . " | ";
3396                         }
3397                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3398                                                     file_name=>$diff->{'to_file'})},
3399                                       "history");
3400                         print "</td>\n";
3401
3402                 } # we should not encounter Unmerged (U) or Unknown (X) status
3403                 print "</tr>\n";
3404         }
3405         print "</tbody>" if $has_header;
3406         print "</table>\n";
3407 }
3408
3409 sub git_patchset_body {
3410         my ($fd, $difftree, $hash, @hash_parents) = @_;
3411         my ($hash_parent) = $hash_parents[0];
3412
3413         my $is_combined = (@hash_parents > 1);
3414         my $patch_idx = 0;
3415         my $patch_number = 0;
3416         my $patch_line;
3417         my $diffinfo;
3418         my $to_name;
3419         my (%from, %to);
3420
3421         print "<div class=\"patchset\">\n";
3422
3423         # skip to first patch
3424         while ($patch_line = <$fd>) {
3425                 chomp $patch_line;
3426
3427                 last if ($patch_line =~ m/^diff /);
3428         }
3429
3430  PATCH:
3431         while ($patch_line) {
3432
3433                 # parse "git diff" header line
3434                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3435                         # $1 is from_name, which we do not use
3436                         $to_name = unquote($2);
3437                         $to_name =~ s!^b/!!;
3438                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3439                         # $1 is 'cc' or 'combined', which we do not use
3440                         $to_name = unquote($2);
3441                 } else {
3442                         $to_name = undef;
3443                 }
3444
3445                 # check if current patch belong to current raw line
3446                 # and parse raw git-diff line if needed
3447                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3448                         # this is continuation of a split patch
3449                         print "<div class=\"patch cont\">\n";
3450                 } else {
3451                         # advance raw git-diff output if needed
3452                         $patch_idx++ if defined $diffinfo;
3453
3454                         # read and prepare patch information
3455                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3456
3457                         # compact combined diff output can have some patches skipped
3458                         # find which patch (using pathname of result) we are at now;
3459                         if ($is_combined) {
3460                                 while ($to_name ne $diffinfo->{'to_file'}) {
3461                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3462                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3463                                               "</div>\n";  # class="patch"
3464
3465                                         $patch_idx++;
3466                                         $patch_number++;
3467
3468                                         last if $patch_idx > $#$difftree;
3469                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3470                                 }
3471                         }
3472
3473                         # modifies %from, %to hashes
3474                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3475
3476                         # this is first patch for raw difftree line with $patch_idx index
3477                         # we index @$difftree array from 0, but number patches from 1
3478                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3479                 }
3480
3481                 # git diff header
3482                 #assert($patch_line =~ m/^diff /) if DEBUG;
3483                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3484                 $patch_number++;
3485                 # print "git diff" header
3486                 print format_git_diff_header_line($patch_line, $diffinfo,
3487                                                   \%from, \%to);
3488
3489                 # print extended diff header
3490                 print "<div class=\"diff extended_header\">\n";
3491         EXTENDED_HEADER:
3492                 while ($patch_line = <$fd>) {
3493                         chomp $patch_line;
3494
3495                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3496
3497                         print format_extended_diff_header_line($patch_line, $diffinfo,
3498                                                                \%from, \%to);
3499                 }
3500                 print "</div>\n"; # class="diff extended_header"
3501
3502                 # from-file/to-file diff header
3503                 if (! $patch_line) {
3504                         print "</div>\n"; # class="patch"
3505                         last PATCH;
3506                 }
3507                 next PATCH if ($patch_line =~ m/^diff /);
3508                 #assert($patch_line =~ m/^---/) if DEBUG;
3509
3510                 my $last_patch_line = $patch_line;
3511                 $patch_line = <$fd>;
3512                 chomp $patch_line;
3513                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3514
3515                 print format_diff_from_to_header($last_patch_line, $patch_line,
3516                                                  $diffinfo, \%from, \%to,
3517                                                  @hash_parents);
3518
3519                 # the patch itself
3520         LINE:
3521                 while ($patch_line = <$fd>) {
3522                         chomp $patch_line;
3523
3524                         next PATCH if ($patch_line =~ m/^diff /);
3525
3526                         print format_diff_line($patch_line, \%from, \%to);
3527                 }
3528
3529         } continue {
3530                 print "</div>\n"; # class="patch"
3531         }
3532
3533         # for compact combined (--cc) format, with chunk and patch simpliciaction
3534         # patchset might be empty, but there might be unprocessed raw lines
3535         for (++$patch_idx if $patch_number > 0;
3536              $patch_idx < @$difftree;
3537              ++$patch_idx) {
3538                 # read and prepare patch information
3539                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3540
3541                 # generate anchor for "patch" links in difftree / whatchanged part
3542                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3543                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3544                       "</div>\n";  # class="patch"
3545
3546                 $patch_number++;
3547         }
3548
3549         if ($patch_number == 0) {
3550                 if (@hash_parents > 1) {
3551                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3552                 } else {
3553                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3554                 }
3555         }
3556
3557         print "</div>\n"; # class="patchset"
3558 }
3559
3560 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3561
3562 sub git_project_list_body {
3563         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3564
3565         my ($check_forks) = gitweb_check_feature('forks');
3566
3567         my @projects;
3568         foreach my $pr (@$projlist) {
3569                 my (@aa) = git_get_last_activity($pr->{'path'});
3570                 unless (@aa) {
3571                         next;
3572                 }
3573                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3574                 if (!defined $pr->{'descr'}) {
3575                         my $descr = git_get_project_description($pr->{'path'}) || "";
3576                         $pr->{'descr_long'} = to_utf8($descr);
3577                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3578                 }
3579                 if (!defined $pr->{'owner'}) {
3580                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3581                 }
3582                 if ($check_forks) {
3583                         my $pname = $pr->{'path'};
3584                         if (($pname =~ s/\.git$//) &&
3585                             ($pname !~ /\/$/) &&
3586                             (-d "$projectroot/$pname")) {
3587                                 $pr->{'forks'} = "-d $projectroot/$pname";
3588                         }
3589                         else {
3590                                 $pr->{'forks'} = 0;
3591                         }
3592                 }
3593                 push @projects, $pr;
3594         }
3595
3596         $order ||= $default_projects_order;
3597         $from = 0 unless defined $from;
3598         $to = $#projects if (!defined $to || $#projects < $to);
3599
3600         print "<table class=\"project_list\">\n";
3601         unless ($no_header) {
3602                 print "<tr>\n";
3603                 if ($check_forks) {
3604                         print "<th></th>\n";
3605                 }
3606                 if ($order eq "project") {
3607                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3608                         print "<th>Project</th>\n";
3609                 } else {
3610                         print "<th>" .
3611                               $cgi->a({-href => href(project=>undef, order=>'project'),
3612                                        -class => "header"}, "Project") .
3613                               "</th>\n";
3614                 }
3615                 if ($order eq "descr") {
3616                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3617                         print "<th>Description</th>\n";
3618                 } else {
3619                         print "<th>" .
3620                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3621                                        -class => "header"}, "Description") .
3622                               "</th>\n";
3623                 }
3624                 if ($order eq "owner") {
3625                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3626                         print "<th>Owner</th>\n";
3627                 } else {
3628                         print "<th>" .
3629                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3630                                        -class => "header"}, "Owner") .
3631                               "</th>\n";
3632                 }
3633                 if ($order eq "age") {
3634                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3635                         print "<th>Last Change</th>\n";
3636                 } else {
3637                         print "<th>" .
3638                               $cgi->a({-href => href(project=>undef, order=>'age'),
3639                                        -class => "header"}, "Last Change") .
3640                               "</th>\n";
3641                 }
3642                 print "<th></th>\n" .
3643                       "</tr>\n";
3644         }
3645         my $alternate = 1;
3646         for (my $i = $from; $i <= $to; $i++) {
3647                 my $pr = $projects[$i];
3648                 if ($alternate) {
3649                         print "<tr class=\"dark\">\n";
3650                 } else {
3651                         print "<tr class=\"light\">\n";
3652                 }
3653                 $alternate ^= 1;
3654                 if ($check_forks) {
3655                         print "<td>";
3656                         if ($pr->{'forks'}) {
3657                                 print "<!-- $pr->{'forks'} -->\n";
3658                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3659                         }
3660                         print "</td>\n";
3661                 }
3662                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3663                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3664                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3665                                         -class => "list", -title => $pr->{'descr_long'}},
3666                                         esc_html($pr->{'descr'})) . "</td>\n" .
3667                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3668                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3669                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3670                       "<td class=\"link\">" .
3671                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3672                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3673                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3674                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3675                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3676                       "</td>\n" .
3677                       "</tr>\n";
3678         }
3679         if (defined $extra) {
3680                 print "<tr>\n";
3681                 if ($check_forks) {
3682                         print "<td></td>\n";
3683                 }
3684                 print "<td colspan=\"5\">$extra</td>\n" .
3685                       "</tr>\n";
3686         }
3687         print "</table>\n";
3688 }
3689
3690 sub git_shortlog_body {
3691         # uses global variable $project
3692         my ($commitlist, $from, $to, $refs, $extra) = @_;
3693
3694         $from = 0 unless defined $from;
3695         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3696
3697         print "<table class=\"shortlog\">\n";
3698         my $alternate = 1;
3699         for (my $i = $from; $i <= $to; $i++) {
3700                 my %co = %{$commitlist->[$i]};
3701                 my $commit = $co{'id'};
3702                 my $ref = format_ref_marker($refs, $commit);
3703                 if ($alternate) {
3704                         print "<tr class=\"dark\">\n";
3705                 } else {
3706                         print "<tr class=\"light\">\n";
3707                 }
3708                 $alternate ^= 1;
3709                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3710                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3711                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3712                       "<td><i>" . $author . "</i></td>\n" .
3713                       "<td>";
3714                 print format_subject_html($co{'title'}, $co{'title_short'},
3715                                           href(action=>"commit", hash=>$commit), $ref);
3716                 print "</td>\n" .
3717                       "<td class=\"link\">" .
3718                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3719                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3720                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3721                 my $snapshot_links = format_snapshot_links($commit);
3722                 if (defined $snapshot_links) {
3723                         print " | " . $snapshot_links;
3724                 }
3725                 print "</td>\n" .
3726                       "</tr>\n";
3727         }
3728         if (defined $extra) {
3729                 print "<tr>\n" .
3730                       "<td colspan=\"4\">$extra</td>\n" .
3731                       "</tr>\n";
3732         }
3733         print "</table>\n";
3734 }
3735
3736 sub git_history_body {
3737         # Warning: assumes constant type (blob or tree) during history
3738         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3739
3740         $from = 0 unless defined $from;
3741         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3742
3743         print "<table class=\"history\">\n";
3744         my $alternate = 1;
3745         for (my $i = $from; $i <= $to; $i++) {
3746                 my %co = %{$commitlist->[$i]};
3747                 if (!%co) {
3748                         next;
3749                 }
3750                 my $commit = $co{'id'};
3751
3752                 my $ref = format_ref_marker($refs, $commit);
3753
3754                 if ($alternate) {
3755                         print "<tr class=\"dark\">\n";
3756                 } else {
3757                         print "<tr class=\"light\">\n";
3758                 }
3759                 $alternate ^= 1;
3760         # shortlog uses      chop_str($co{'author_name'}, 10)
3761                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3762                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3763                       "<td><i>" . $author . "</i></td>\n" .
3764                       "<td>";
3765                 # originally git_history used chop_str($co{'title'}, 50)
3766                 print format_subject_html($co{'title'}, $co{'title_short'},
3767                                           href(action=>"commit", hash=>$commit), $ref);
3768                 print "</td>\n" .
3769                       "<td class=\"link\">" .
3770                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3771                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3772
3773                 if ($ftype eq 'blob') {
3774                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3775                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3776                         if (defined $blob_current && defined $blob_parent &&
3777                                         $blob_current ne $blob_parent) {
3778                                 print " | " .
3779                                         $cgi->a({-href => href(action=>"blobdiff",
3780                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3781                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3782                                                                file_name=>$file_name)},
3783                                                 "diff to current");
3784                         }
3785                 }
3786                 print "</td>\n" .
3787                       "</tr>\n";
3788         }
3789         if (defined $extra) {
3790                 print "<tr>\n" .
3791                       "<td colspan=\"4\">$extra</td>\n" .
3792                       "</tr>\n";
3793         }
3794         print "</table>\n";
3795 }
3796
3797 sub git_tags_body {
3798         # uses global variable $project
3799         my ($taglist, $from, $to, $extra) = @_;
3800         $from = 0 unless defined $from;
3801         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3802
3803         print "<table class=\"tags\">\n";
3804         my $alternate = 1;
3805         for (my $i = $from; $i <= $to; $i++) {
3806                 my $entry = $taglist->[$i];
3807                 my %tag = %$entry;
3808                 my $comment = $tag{'subject'};
3809                 my $comment_short;
3810                 if (defined $comment) {
3811                         $comment_short = chop_str($comment, 30, 5);
3812                 }
3813                 if ($alternate) {
3814                         print "<tr class=\"dark\">\n";
3815                 } else {
3816                         print "<tr class=\"light\">\n";
3817                 }
3818                 $alternate ^= 1;
3819                 if (defined $tag{'age'}) {
3820                         print "<td><i>$tag{'age'}</i></td>\n";
3821                 } else {
3822                         print "<td></td>\n";
3823                 }
3824                 print "<td>" .
3825                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3826                                -class => "list name"}, esc_html($tag{'name'})) .
3827                       "</td>\n" .
3828                       "<td>";
3829                 if (defined $comment) {
3830                         print format_subject_html($comment, $comment_short,
3831                                                   href(action=>"tag", hash=>$tag{'id'}));
3832                 }
3833                 print "</td>\n" .
3834                       "<td class=\"selflink\">";
3835                 if ($tag{'type'} eq "tag") {
3836                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3837                 } else {
3838                         print "&nbsp;";
3839                 }
3840                 print "</td>\n" .
3841                       "<td class=\"link\">" . " | " .
3842                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3843                 if ($tag{'reftype'} eq "commit") {
3844                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3845                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3846                 } elsif ($tag{'reftype'} eq "blob") {
3847                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3848                 }
3849                 print "</td>\n" .
3850                       "</tr>";
3851         }
3852         if (defined $extra) {
3853                 print "<tr>\n" .
3854                       "<td colspan=\"5\">$extra</td>\n" .
3855                       "</tr>\n";
3856         }
3857         print "</table>\n";
3858 }
3859
3860 sub git_heads_body {
3861         # uses global variable $project
3862         my ($headlist, $head, $from, $to, $extra) = @_;
3863         $from = 0 unless defined $from;
3864         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3865
3866         print "<table class=\"heads\">\n";
3867         my $alternate = 1;
3868         for (my $i = $from; $i <= $to; $i++) {
3869                 my $entry = $headlist->[$i];
3870                 my %ref = %$entry;
3871                 my $curr = $ref{'id'} eq $head;
3872                 if ($alternate) {
3873                         print "<tr class=\"dark\">\n";
3874                 } else {
3875                         print "<tr class=\"light\">\n";
3876                 }
3877                 $alternate ^= 1;
3878                 print "<td><i>$ref{'age'}</i></td>\n" .
3879                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3880                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3881                                -class => "list name"},esc_html($ref{'name'})) .
3882                       "</td>\n" .
3883                       "<td class=\"link\">" .
3884                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3885                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3886                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3887                       "</td>\n" .
3888                       "</tr>";
3889         }
3890         if (defined $extra) {
3891                 print "<tr>\n" .
3892                       "<td colspan=\"3\">$extra</td>\n" .
3893                       "</tr>\n";
3894         }
3895         print "</table>\n";
3896 }
3897
3898 sub git_search_grep_body {
3899         my ($commitlist, $from, $to, $extra) = @_;
3900         $from = 0 unless defined $from;
3901         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3902
3903         print "<table class=\"commit_search\">\n";
3904         my $alternate = 1;
3905         for (my $i = $from; $i <= $to; $i++) {
3906                 my %co = %{$commitlist->[$i]};
3907                 if (!%co) {
3908                         next;
3909                 }
3910                 my $commit = $co{'id'};
3911                 if ($alternate) {
3912                         print "<tr class=\"dark\">\n";
3913                 } else {
3914                         print "<tr class=\"light\">\n";
3915                 }
3916                 $alternate ^= 1;
3917                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3918                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3919                       "<td><i>" . $author . "</i></td>\n" .
3920                       "<td>" .
3921                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3922                                -class => "list subject"},
3923                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3924                 my $comment = $co{'comment'};
3925                 foreach my $line (@$comment) {
3926                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3927                                 my ($lead, $match, $trail) = ($1, $2, $3);
3928                                 $match = chop_str($match, 70, 5, 'center');
3929                                 my $contextlen = int((80 - length($match))/2);
3930                                 $contextlen = 30 if ($contextlen > 30);
3931                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3932                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3933
3934                                 $lead  = esc_html($lead);
3935                                 $match = esc_html($match);
3936                                 $trail = esc_html($trail);
3937
3938                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3939                         }
3940                 }
3941                 print "</td>\n" .
3942                       "<td class=\"link\">" .
3943                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3944                       " | " .
3945                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3946                       " | " .
3947                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3948                 print "</td>\n" .
3949                       "</tr>\n";
3950         }
3951         if (defined $extra) {
3952                 print "<tr>\n" .
3953                       "<td colspan=\"3\">$extra</td>\n" .
3954                       "</tr>\n";
3955         }
3956         print "</table>\n";
3957 }
3958
3959 ## ======================================================================
3960 ## ======================================================================
3961 ## actions
3962
3963 sub git_project_list {
3964         my $order = $cgi->param('o');
3965         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3966                 die_error(undef, "Unknown order parameter");
3967         }
3968
3969         my @list = git_get_projects_list();
3970         if (!@list) {
3971                 die_error(undef, "No projects found");
3972         }
3973
3974         git_header_html();
3975         if (-f $home_text) {
3976                 print "<div class=\"index_include\">\n";
3977                 open (my $fd, $home_text);
3978                 print <$fd>;
3979                 close $fd;
3980                 print "</div>\n";
3981         }
3982         git_project_list_body(\@list, $order);
3983         git_footer_html();
3984 }
3985
3986 sub git_forks {
3987         my $order = $cgi->param('o');
3988         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3989                 die_error(undef, "Unknown order parameter");
3990         }
3991
3992         my @list = git_get_projects_list($project);
3993         if (!@list) {
3994                 die_error(undef, "No forks found");
3995         }
3996
3997         git_header_html();
3998         git_print_page_nav('','');
3999         git_print_header_div('summary', "$project forks");
4000         git_project_list_body(\@list, $order);
4001         git_footer_html();
4002 }
4003
4004 sub git_project_index {
4005         my @projects = git_get_projects_list($project);
4006
4007         print $cgi->header(
4008                 -type => 'text/plain',
4009                 -charset => 'utf-8',
4010                 -content_disposition => 'inline; filename="index.aux"');
4011
4012         foreach my $pr (@projects) {
4013                 if (!exists $pr->{'owner'}) {
4014                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4015                 }
4016
4017                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4018                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4019                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4020                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4021                 $path  =~ s/ /\+/g;
4022                 $owner =~ s/ /\+/g;
4023
4024                 print "$path $owner\n";
4025         }
4026 }
4027
4028 sub git_summary {
4029         my $descr = git_get_project_description($project) || "none";
4030         my %co = parse_commit("HEAD");
4031         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4032         my $head = $co{'id'};
4033
4034         my $owner = git_get_project_owner($project);
4035
4036         my $refs = git_get_references();
4037         # These get_*_list functions return one more to allow us to see if
4038         # there are more ...
4039         my @taglist  = git_get_tags_list(16);
4040         my @headlist = git_get_heads_list(16);
4041         my @forklist;
4042         my ($check_forks) = gitweb_check_feature('forks');
4043
4044         if ($check_forks) {
4045                 @forklist = git_get_projects_list($project);
4046         }
4047
4048         git_header_html();
4049         git_print_page_nav('summary','', $head);
4050
4051         print "<div class=\"title\">&nbsp;</div>\n";
4052         print "<table class=\"projects_list\">\n" .
4053               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4054               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4055         if (defined $cd{'rfc2822'}) {
4056                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4057         }
4058
4059         # use per project git URL list in $projectroot/$project/cloneurl
4060         # or make project git URL from git base URL and project name
4061         my $url_tag = "URL";
4062         my @url_list = git_get_project_url_list($project);
4063         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4064         foreach my $git_url (@url_list) {
4065                 next unless $git_url;
4066                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4067                 $url_tag = "";
4068         }
4069         print "</table>\n";
4070
4071         if (-s "$projectroot/$project/README.html") {
4072                 if (open my $fd, "$projectroot/$project/README.html") {
4073                         print "<div class=\"title\">readme</div>\n" .
4074                               "<div class=\"readme\">\n";
4075                         print $_ while (<$fd>);
4076                         print "\n</div>\n"; # class="readme"
4077                         close $fd;
4078                 }
4079         }
4080
4081         # we need to request one more than 16 (0..15) to check if
4082         # those 16 are all
4083         my @commitlist = $head ? parse_commits($head, 17) : ();
4084         if (@commitlist) {
4085                 git_print_header_div('shortlog');
4086                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4087                                   $#commitlist <=  15 ? undef :
4088                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4089         }
4090
4091         if (@taglist) {
4092                 git_print_header_div('tags');
4093                 git_tags_body(\@taglist, 0, 15,
4094                               $#taglist <=  15 ? undef :
4095                               $cgi->a({-href => href(action=>"tags")}, "..."));
4096         }
4097
4098         if (@headlist) {
4099                 git_print_header_div('heads');
4100                 git_heads_body(\@headlist, $head, 0, 15,
4101                                $#headlist <= 15 ? undef :
4102                                $cgi->a({-href => href(action=>"heads")}, "..."));
4103         }
4104
4105         if (@forklist) {
4106                 git_print_header_div('forks');
4107                 git_project_list_body(\@forklist, undef, 0, 15,
4108                                       $#forklist <= 15 ? undef :
4109                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4110                                       'noheader');
4111         }
4112
4113         git_footer_html();
4114 }
4115
4116 sub git_tag {
4117         my $head = git_get_head_hash($project);
4118         git_header_html();
4119         git_print_page_nav('','', $head,undef,$head);
4120         my %tag = parse_tag($hash);
4121
4122         if (! %tag) {
4123                 die_error(undef, "Unknown tag object");
4124         }
4125
4126         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4127         print "<div class=\"title_text\">\n" .
4128               "<table class=\"object_header\">\n" .
4129               "<tr>\n" .
4130               "<td>object</td>\n" .
4131               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4132                                $tag{'object'}) . "</td>\n" .
4133               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4134                                               $tag{'type'}) . "</td>\n" .
4135               "</tr>\n";
4136         if (defined($tag{'author'})) {
4137                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4138                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4139                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4140                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4141                         "</td></tr>\n";
4142         }
4143         print "</table>\n\n" .
4144               "</div>\n";
4145         print "<div class=\"page_body\">";
4146         my $comment = $tag{'comment'};
4147         foreach my $line (@$comment) {
4148                 chomp $line;
4149                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4150         }
4151         print "</div>\n";
4152         git_footer_html();
4153 }
4154
4155 sub git_blame2 {
4156         my $fd;
4157         my $ftype;
4158
4159         my ($have_blame) = gitweb_check_feature('blame');
4160         if (!$have_blame) {
4161                 die_error('403 Permission denied', "Permission denied");
4162         }
4163         die_error('404 Not Found', "File name not defined") if (!$file_name);
4164         $hash_base ||= git_get_head_hash($project);
4165         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4166         my %co = parse_commit($hash_base)
4167                 or die_error(undef, "Reading commit failed");
4168         if (!defined $hash) {
4169                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4170                         or die_error(undef, "Error looking up file");
4171         }
4172         $ftype = git_get_type($hash);
4173         if ($ftype !~ "blob") {
4174                 die_error('400 Bad Request', "Object is not a blob");
4175         }
4176         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4177               $file_name, $hash_base)
4178                 or die_error(undef, "Open git-blame failed");
4179         git_header_html();
4180         my $formats_nav =
4181                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4182                         "blob") .
4183                 " | " .
4184                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4185                         "history") .
4186                 " | " .
4187                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4188                         "HEAD");
4189         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4190         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4191         git_print_page_path($file_name, $ftype, $hash_base);
4192         my @rev_color = (qw(light2 dark2));
4193         my $num_colors = scalar(@rev_color);
4194         my $current_color = 0;
4195         my $last_rev;
4196         print <<HTML;
4197 <div class="page_body">
4198 <table class="blame">
4199 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4200 HTML
4201         my %metainfo = ();
4202         while (1) {
4203                 $_ = <$fd>;
4204                 last unless defined $_;
4205                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4206                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4207                 if (!exists $metainfo{$full_rev}) {
4208                         $metainfo{$full_rev} = {};
4209                 }
4210                 my $meta = $metainfo{$full_rev};
4211                 while (<$fd>) {
4212                         last if (s/^\t//);
4213                         if (/^(\S+) (.*)$/) {
4214                                 $meta->{$1} = $2;
4215                         }
4216                 }
4217                 my $data = $_;
4218                 chomp $data;
4219                 my $rev = substr($full_rev, 0, 8);
4220                 my $author = $meta->{'author'};
4221                 my %date = parse_date($meta->{'author-time'},
4222                                       $meta->{'author-tz'});
4223                 my $date = $date{'iso-tz'};
4224                 if ($group_size) {
4225                         $current_color = ++$current_color % $num_colors;
4226                 }
4227                 print "<tr class=\"$rev_color[$current_color]\">\n";
4228                 if ($group_size) {
4229                         print "<td class=\"sha1\"";
4230                         print " title=\"". esc_html($author) . ", $date\"";
4231                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4232                         print ">";
4233                         print $cgi->a({-href => href(action=>"commit",
4234                                                      hash=>$full_rev,
4235                                                      file_name=>$file_name)},
4236                                       esc_html($rev));
4237                         print "</td>\n";
4238                 }
4239                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4240                         or die_error(undef, "Open git-rev-parse failed");
4241                 my $parent_commit = <$dd>;
4242                 close $dd;
4243                 chomp($parent_commit);
4244                 my $blamed = href(action => 'blame',
4245                                   file_name => $meta->{'filename'},
4246                                   hash_base => $parent_commit);
4247                 print "<td class=\"linenr\">";
4248                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4249                                 -id => "l$lineno",
4250                                 -class => "linenr" },
4251                               esc_html($lineno));
4252                 print "</td>";
4253                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4254                 print "</tr>\n";
4255         }
4256         print "</table>\n";
4257         print "</div>";
4258         close $fd
4259                 or print "Reading blob failed\n";
4260         git_footer_html();
4261 }
4262
4263 sub git_blame {
4264         my $fd;
4265
4266         my ($have_blame) = gitweb_check_feature('blame');
4267         if (!$have_blame) {
4268                 die_error('403 Permission denied', "Permission denied");
4269         }
4270         die_error('404 Not Found', "File name not defined") if (!$file_name);
4271         $hash_base ||= git_get_head_hash($project);
4272         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4273         my %co = parse_commit($hash_base)
4274                 or die_error(undef, "Reading commit failed");
4275         if (!defined $hash) {
4276                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4277                         or die_error(undef, "Error lookup file");
4278         }
4279         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4280                 or die_error(undef, "Open git-annotate failed");
4281         git_header_html();
4282         my $formats_nav =
4283                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4284                         "blob") .
4285                 " | " .
4286                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4287                         "history") .
4288                 " | " .
4289                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4290                         "HEAD");
4291         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4292         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4293         git_print_page_path($file_name, 'blob', $hash_base);
4294         print "<div class=\"page_body\">\n";
4295         print <<HTML;
4296 <table class="blame">
4297   <tr>
4298     <th>Commit</th>
4299     <th>Age</th>
4300     <th>Author</th>
4301     <th>Line</th>
4302     <th>Data</th>
4303   </tr>
4304 HTML
4305         my @line_class = (qw(light dark));
4306         my $line_class_len = scalar (@line_class);
4307         my $line_class_num = $#line_class;
4308         while (my $line = <$fd>) {
4309                 my $long_rev;
4310                 my $short_rev;
4311                 my $author;
4312                 my $time;
4313                 my $lineno;
4314                 my $data;
4315                 my $age;
4316                 my $age_str;
4317                 my $age_class;
4318
4319                 chomp $line;
4320                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4321
4322                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4323                         $long_rev = $1;
4324                         $author   = $2;
4325                         $time     = $3;
4326                         $lineno   = $4;
4327                         $data     = $5;
4328                 } else {
4329                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4330                         next;
4331                 }
4332                 $short_rev  = substr ($long_rev, 0, 8);
4333                 $age        = time () - $time;
4334                 $age_str    = age_string ($age);
4335                 $age_str    =~ s/ /&nbsp;/g;
4336                 $age_class  = age_class($age);
4337                 $author     = esc_html ($author);
4338                 $author     =~ s/ /&nbsp;/g;
4339
4340                 $data = untabify($data);
4341                 $data = esc_html ($data);
4342
4343                 print <<HTML;
4344   <tr class="$line_class[$line_class_num]">
4345     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4346     <td class="$age_class">$age_str</td>
4347     <td>$author</td>
4348     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4349     <td class="pre">$data</td>
4350   </tr>
4351 HTML
4352         } # while (my $line = <$fd>)
4353         print "</table>\n\n";
4354         close $fd
4355                 or print "Reading blob failed.\n";
4356         print "</div>";
4357         git_footer_html();
4358 }
4359
4360 sub git_tags {
4361         my $head = git_get_head_hash($project);
4362         git_header_html();
4363         git_print_page_nav('','', $head,undef,$head);
4364         git_print_header_div('summary', $project);
4365
4366         my @tagslist = git_get_tags_list();
4367         if (@tagslist) {
4368                 git_tags_body(\@tagslist);
4369         }
4370         git_footer_html();
4371 }
4372
4373 sub git_heads {
4374         my $head = git_get_head_hash($project);
4375         git_header_html();
4376         git_print_page_nav('','', $head,undef,$head);
4377         git_print_header_div('summary', $project);
4378
4379         my @headslist = git_get_heads_list();
4380         if (@headslist) {
4381                 git_heads_body(\@headslist, $head);
4382         }
4383         git_footer_html();
4384 }
4385
4386 sub git_blob_plain {
4387         my $type = shift;
4388         my $expires;
4389
4390         if (!defined $hash) {
4391                 if (defined $file_name) {
4392                         my $base = $hash_base || git_get_head_hash($project);
4393                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4394                                 or die_error(undef, "Error lookup file");
4395                 } else {
4396                         die_error(undef, "No file name defined");
4397                 }
4398         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4399                 # blobs defined by non-textual hash id's can be cached
4400                 $expires = "+1d";
4401         }
4402
4403         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4404                 or die_error(undef, "Open git-cat-file blob '$hash' failed");
4405
4406         # content-type (can include charset)
4407         $type = blob_contenttype($fd, $file_name, $type);
4408
4409         # "save as" filename, even when no $file_name is given
4410         my $save_as = "$hash";
4411         if (defined $file_name) {
4412                 $save_as = $file_name;
4413         } elsif ($type =~ m/^text\//) {
4414                 $save_as .= '.txt';
4415         }
4416
4417         print $cgi->header(
4418                 -type => $type,
4419                 -expires => $expires,
4420                 -content_disposition => 'inline; filename="' . $save_as . '"');
4421         undef $/;
4422         binmode STDOUT, ':raw';
4423         print <$fd>;
4424         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4425         $/ = "\n";
4426         close $fd;
4427 }
4428
4429 sub git_blob {
4430         my $expires;
4431
4432         if (!defined $hash) {
4433                 if (defined $file_name) {
4434                         my $base = $hash_base || git_get_head_hash($project);
4435                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4436                                 or die_error(undef, "Error lookup file");
4437                 } else {
4438                         die_error(undef, "No file name defined");
4439                 }
4440         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4441                 # blobs defined by non-textual hash id's can be cached
4442                 $expires = "+1d";
4443         }
4444
4445         my ($have_blame) = gitweb_check_feature('blame');
4446         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4447                 or die_error(undef, "Couldn't cat $file_name, $hash");
4448         my $mimetype = blob_mimetype($fd, $file_name);
4449         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4450                 close $fd;
4451                 return git_blob_plain($mimetype);
4452         }
4453         # we can have blame only for text/* mimetype
4454         $have_blame &&= ($mimetype =~ m!^text/!);
4455
4456         git_header_html(undef, $expires);
4457         my $formats_nav = '';
4458         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4459                 if (defined $file_name) {
4460                         if ($have_blame) {
4461                                 $formats_nav .=
4462                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4463                                                 "blame") .
4464                                         " | ";
4465                         }
4466                         $formats_nav .=
4467                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4468                                         "history") .
4469                                 " | " .
4470                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4471                                         "raw") .
4472                                 " | " .
4473                                 $cgi->a({-href => href(action=>"blob",
4474                                                        hash_base=>"HEAD", file_name=>$file_name)},
4475                                         "HEAD");
4476                 } else {
4477                         $formats_nav .=
4478                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4479                                         "raw");
4480                 }
4481                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4482                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4483         } else {
4484                 print "<div class=\"page_nav\">\n" .
4485                       "<br/><br/></div>\n" .
4486                       "<div class=\"title\">$hash</div>\n";
4487         }
4488         git_print_page_path($file_name, "blob", $hash_base);
4489         print "<div class=\"page_body\">\n";
4490         if ($mimetype =~ m!^image/!) {
4491                 print qq!<img type="$mimetype"!;
4492                 if ($file_name) {
4493                         print qq! alt="$file_name" title="$file_name"!;
4494                 }
4495                 print qq! src="! .
4496                       href(action=>"blob_plain", hash=>$hash,
4497                            hash_base=>$hash_base, file_name=>$file_name) .
4498                       qq!" />\n!;
4499         } else {
4500                 my $nr;
4501                 while (my $line = <$fd>) {
4502                         chomp $line;
4503                         $nr++;
4504                         $line = untabify($line);
4505                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4506                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4507                 }
4508         }
4509         close $fd
4510                 or print "Reading blob failed.\n";
4511         print "</div>";
4512         git_footer_html();
4513 }
4514
4515 sub git_tree {
4516         if (!defined $hash_base) {
4517                 $hash_base = "HEAD";
4518         }
4519         if (!defined $hash) {
4520                 if (defined $file_name) {
4521                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4522                 } else {
4523                         $hash = $hash_base;
4524                 }
4525         }
4526         $/ = "\0";
4527         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4528                 or die_error(undef, "Open git-ls-tree failed");
4529         my @entries = map { chomp; $_ } <$fd>;
4530         close $fd or die_error(undef, "Reading tree failed");
4531         $/ = "\n";
4532
4533         my $refs = git_get_references();
4534         my $ref = format_ref_marker($refs, $hash_base);
4535         git_header_html();
4536         my $basedir = '';
4537         my ($have_blame) = gitweb_check_feature('blame');
4538         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4539                 my @views_nav = ();
4540                 if (defined $file_name) {
4541                         push @views_nav,
4542                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4543                                         "history"),
4544                                 $cgi->a({-href => href(action=>"tree",
4545                                                        hash_base=>"HEAD", file_name=>$file_name)},
4546                                         "HEAD"),
4547                 }
4548                 my $snapshot_links = format_snapshot_links($hash);
4549                 if (defined $snapshot_links) {
4550                         # FIXME: Should be available when we have no hash base as well.
4551                         push @views_nav, $snapshot_links;
4552                 }
4553                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4554                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4555         } else {
4556                 undef $hash_base;
4557                 print "<div class=\"page_nav\">\n";
4558                 print "<br/><br/></div>\n";
4559                 print "<div class=\"title\">$hash</div>\n";
4560         }
4561         if (defined $file_name) {
4562                 $basedir = $file_name;
4563                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4564                         $basedir .= '/';
4565                 }
4566         }
4567         git_print_page_path($file_name, 'tree', $hash_base);
4568         print "<div class=\"page_body\">\n";
4569         print "<table class=\"tree\">\n";
4570         my $alternate = 1;
4571         # '..' (top directory) link if possible
4572         if (defined $hash_base &&
4573             defined $file_name && $file_name =~ m![^/]+$!) {
4574                 if ($alternate) {
4575                         print "<tr class=\"dark\">\n";
4576                 } else {
4577                         print "<tr class=\"light\">\n";
4578                 }
4579                 $alternate ^= 1;
4580
4581                 my $up = $file_name;
4582                 $up =~ s!/?[^/]+$!!;
4583                 undef $up unless $up;
4584                 # based on git_print_tree_entry
4585                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4586                 print '<td class="list">';
4587                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4588                                              file_name=>$up)},
4589                               "..");
4590                 print "</td>\n";
4591                 print "<td class=\"link\"></td>\n";
4592
4593                 print "</tr>\n";
4594         }
4595         foreach my $line (@entries) {
4596                 my %t = parse_ls_tree_line($line, -z => 1);
4597
4598                 if ($alternate) {
4599                         print "<tr class=\"dark\">\n";
4600                 } else {
4601                         print "<tr class=\"light\">\n";
4602                 }
4603                 $alternate ^= 1;
4604
4605                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4606
4607                 print "</tr>\n";
4608         }
4609         print "</table>\n" .
4610               "</div>";
4611         git_footer_html();
4612 }
4613
4614 sub git_snapshot {
4615         my @supported_fmts = gitweb_check_feature('snapshot');
4616         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4617
4618         my $format = $cgi->param('sf');
4619         if (!@supported_fmts) {
4620                 die_error('403 Permission denied', "Permission denied");
4621         }
4622         # default to first supported snapshot format
4623         $format ||= $supported_fmts[0];
4624         if ($format !~ m/^[a-z0-9]+$/) {
4625                 die_error(undef, "Invalid snapshot format parameter");
4626         } elsif (!exists($known_snapshot_formats{$format})) {
4627                 die_error(undef, "Unknown snapshot format");
4628         } elsif (!grep($_ eq $format, @supported_fmts)) {
4629                 die_error(undef, "Unsupported snapshot format");
4630         }
4631
4632         if (!defined $hash) {
4633                 $hash = git_get_head_hash($project);
4634         }
4635
4636         my $git_command = git_cmd_str();
4637         my $name = $project;
4638         $name =~ s,([^/])/*\.git$,$1,;
4639         $name = basename($name);
4640         my $filename = to_utf8($name);
4641         $name =~ s/\047/\047\\\047\047/g;
4642         my $cmd;
4643         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4644         $cmd = "$git_command archive " .
4645                 "--format=$known_snapshot_formats{$format}{'format'} " .
4646                 "--prefix=\'$name\'/ $hash";
4647         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4648                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4649         }
4650
4651         print $cgi->header(
4652                 -type => $known_snapshot_formats{$format}{'type'},
4653                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4654                 -status => '200 OK');
4655
4656         open my $fd, "-|", $cmd
4657                 or die_error(undef, "Execute git-archive failed");
4658         binmode STDOUT, ':raw';
4659         print <$fd>;
4660         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4661         close $fd;
4662 }
4663
4664 sub git_log {
4665         my $head = git_get_head_hash($project);
4666         if (!defined $hash) {
4667                 $hash = $head;
4668         }
4669         if (!defined $page) {
4670                 $page = 0;
4671         }
4672         my $refs = git_get_references();
4673
4674         my @commitlist = parse_commits($hash, 101, (100 * $page));
4675
4676         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4677
4678         git_header_html();
4679         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4680
4681         if (!@commitlist) {
4682                 my %co = parse_commit($hash);
4683
4684                 git_print_header_div('summary', $project);
4685                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4686         }
4687         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4688         for (my $i = 0; $i <= $to; $i++) {
4689                 my %co = %{$commitlist[$i]};
4690                 next if !%co;
4691                 my $commit = $co{'id'};
4692                 my $ref = format_ref_marker($refs, $commit);
4693                 my %ad = parse_date($co{'author_epoch'});
4694                 git_print_header_div('commit',
4695                                "<span class=\"age\">$co{'age_string'}</span>" .
4696                                esc_html($co{'title'}) . $ref,
4697                                $commit);
4698                 print "<div class=\"title_text\">\n" .
4699                       "<div class=\"log_link\">\n" .
4700                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4701                       " | " .
4702                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4703                       " | " .
4704                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4705                       "<br/>\n" .
4706                       "</div>\n" .
4707                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4708                       "</div>\n";
4709
4710                 print "<div class=\"log_body\">\n";
4711                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4712                 print "</div>\n";
4713         }
4714         if ($#commitlist >= 100) {
4715                 print "<div class=\"page_nav\">\n";
4716                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4717                                -accesskey => "n", -title => "Alt-n"}, "next");
4718                 print "</div>\n";
4719         }
4720         git_footer_html();
4721 }
4722
4723 sub git_commit {
4724         $hash ||= $hash_base || "HEAD";
4725         my %co = parse_commit($hash);
4726         if (!%co) {
4727                 die_error(undef, "Unknown commit object");
4728         }
4729         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4730         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4731
4732         my $parent  = $co{'parent'};
4733         my $parents = $co{'parents'}; # listref
4734
4735         # we need to prepare $formats_nav before any parameter munging
4736         my $formats_nav;
4737         if (!defined $parent) {
4738                 # --root commitdiff
4739                 $formats_nav .= '(initial)';
4740         } elsif (@$parents == 1) {
4741                 # single parent commit
4742                 $formats_nav .=
4743                         '(parent: ' .
4744                         $cgi->a({-href => href(action=>"commit",
4745                                                hash=>$parent)},
4746                                 esc_html(substr($parent, 0, 7))) .
4747                         ')';
4748         } else {
4749                 # merge commit
4750                 $formats_nav .=
4751                         '(merge: ' .
4752                         join(' ', map {
4753                                 $cgi->a({-href => href(action=>"commit",
4754                                                        hash=>$_)},
4755                                         esc_html(substr($_, 0, 7)));
4756                         } @$parents ) .
4757                         ')';
4758         }
4759
4760         if (!defined $parent) {
4761                 $parent = "--root";
4762         }
4763         my @difftree;
4764         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4765                 @diff_opts,
4766                 (@$parents <= 1 ? $parent : '-c'),
4767                 $hash, "--"
4768                 or die_error(undef, "Open git-diff-tree failed");
4769         @difftree = map { chomp; $_ } <$fd>;
4770         close $fd or die_error(undef, "Reading git-diff-tree failed");
4771
4772         # non-textual hash id's can be cached
4773         my $expires;
4774         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4775                 $expires = "+1d";
4776         }
4777         my $refs = git_get_references();
4778         my $ref = format_ref_marker($refs, $co{'id'});
4779
4780         git_header_html(undef, $expires);
4781         git_print_page_nav('commit', '',
4782                            $hash, $co{'tree'}, $hash,
4783                            $formats_nav);
4784
4785         if (defined $co{'parent'}) {
4786                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4787         } else {
4788                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4789         }
4790         print "<div class=\"title_text\">\n" .
4791               "<table class=\"object_header\">\n";
4792         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4793               "<tr>" .
4794               "<td></td><td> $ad{'rfc2822'}";
4795         if ($ad{'hour_local'} < 6) {
4796                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4797                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4798         } else {
4799                 printf(" (%02d:%02d %s)",
4800                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4801         }
4802         print "</td>" .
4803               "</tr>\n";
4804         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4805         print "<tr><td></td><td> $cd{'rfc2822'}" .
4806               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4807               "</td></tr>\n";
4808         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4809         print "<tr>" .
4810               "<td>tree</td>" .
4811               "<td class=\"sha1\">" .
4812               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4813                        class => "list"}, $co{'tree'}) .
4814               "</td>" .
4815               "<td class=\"link\">" .
4816               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4817                       "tree");
4818         my $snapshot_links = format_snapshot_links($hash);
4819         if (defined $snapshot_links) {
4820                 print " | " . $snapshot_links;
4821         }
4822         print "</td>" .
4823               "</tr>\n";
4824
4825         foreach my $par (@$parents) {
4826                 print "<tr>" .
4827                       "<td>parent</td>" .
4828                       "<td class=\"sha1\">" .
4829                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4830                                class => "list"}, $par) .
4831                       "</td>" .
4832                       "<td class=\"link\">" .
4833                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4834                       " | " .
4835                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4836                       "</td>" .
4837                       "</tr>\n";
4838         }
4839         print "</table>".
4840               "</div>\n";
4841
4842         print "<div class=\"page_body\">\n";
4843         git_print_log($co{'comment'});
4844         print "</div>\n";
4845
4846         git_difftree_body(\@difftree, $hash, @$parents);
4847
4848         git_footer_html();
4849 }
4850
4851 sub git_object {
4852         # object is defined by:
4853         # - hash or hash_base alone
4854         # - hash_base and file_name
4855         my $type;
4856
4857         # - hash or hash_base alone
4858         if ($hash || ($hash_base && !defined $file_name)) {
4859                 my $object_id = $hash || $hash_base;
4860
4861                 my $git_command = git_cmd_str();
4862                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4863                         or die_error('404 Not Found', "Object does not exist");
4864                 $type = <$fd>;
4865                 chomp $type;
4866                 close $fd
4867                         or die_error('404 Not Found', "Object does not exist");
4868
4869         # - hash_base and file_name
4870         } elsif ($hash_base && defined $file_name) {
4871                 $file_name =~ s,/+$,,;
4872
4873                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4874                         or die_error('404 Not Found', "Base object does not exist");
4875
4876                 # here errors should not hapen
4877                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4878                         or die_error(undef, "Open git-ls-tree failed");
4879                 my $line = <$fd>;
4880                 close $fd;
4881
4882                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4883                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4884                         die_error('404 Not Found', "File or directory for given base does not exist");
4885                 }
4886                 $type = $2;
4887                 $hash = $3;
4888         } else {
4889                 die_error('404 Not Found', "Not enough information to find object");
4890         }
4891
4892         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4893                                           hash=>$hash, hash_base=>$hash_base,
4894                                           file_name=>$file_name),
4895                              -status => '302 Found');
4896 }
4897
4898 sub git_blobdiff {
4899         my $format = shift || 'html';
4900
4901         my $fd;
4902         my @difftree;
4903         my %diffinfo;
4904         my $expires;
4905
4906         # preparing $fd and %diffinfo for git_patchset_body
4907         # new style URI
4908         if (defined $hash_base && defined $hash_parent_base) {
4909                 if (defined $file_name) {
4910                         # read raw output
4911                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4912                                 $hash_parent_base, $hash_base,
4913                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4914                                 or die_error(undef, "Open git-diff-tree failed");
4915                         @difftree = map { chomp; $_ } <$fd>;
4916                         close $fd
4917                                 or die_error(undef, "Reading git-diff-tree failed");
4918                         @difftree
4919                                 or die_error('404 Not Found', "Blob diff not found");
4920
4921                 } elsif (defined $hash &&
4922                          $hash =~ /[0-9a-fA-F]{40}/) {
4923                         # try to find filename from $hash
4924
4925                         # read filtered raw output
4926                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4927                                 $hash_parent_base, $hash_base, "--"
4928                                 or die_error(undef, "Open git-diff-tree failed");
4929                         @difftree =
4930                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4931                                 # $hash == to_id
4932                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4933                                 map { chomp; $_ } <$fd>;
4934                         close $fd
4935                                 or die_error(undef, "Reading git-diff-tree failed");
4936                         @difftree
4937                                 or die_error('404 Not Found', "Blob diff not found");
4938
4939                 } else {
4940                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4941                 }
4942
4943                 if (@difftree > 1) {
4944                         die_error('404 Not Found', "Ambiguous blob diff specification");
4945                 }
4946
4947                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4948                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4949                 $file_name   ||= $diffinfo{'to_file'};
4950
4951                 $hash_parent ||= $diffinfo{'from_id'};
4952                 $hash        ||= $diffinfo{'to_id'};
4953
4954                 # non-textual hash id's can be cached
4955                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4956                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4957                         $expires = '+1d';
4958                 }
4959
4960                 # open patch output
4961                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4962                         '-p', ($format eq 'html' ? "--full-index" : ()),
4963                         $hash_parent_base, $hash_base,
4964                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4965                         or die_error(undef, "Open git-diff-tree failed");
4966         }
4967
4968         # old/legacy style URI
4969         if (!%diffinfo && # if new style URI failed
4970             defined $hash && defined $hash_parent) {
4971                 # fake git-diff-tree raw output
4972                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4973                 $diffinfo{'from_id'} = $hash_parent;
4974                 $diffinfo{'to_id'}   = $hash;
4975                 if (defined $file_name) {
4976                         if (defined $file_parent) {
4977                                 $diffinfo{'status'} = '2';
4978                                 $diffinfo{'from_file'} = $file_parent;
4979                                 $diffinfo{'to_file'}   = $file_name;
4980                         } else { # assume not renamed
4981                                 $diffinfo{'status'} = '1';
4982                                 $diffinfo{'from_file'} = $file_name;
4983                                 $diffinfo{'to_file'}   = $file_name;
4984                         }
4985                 } else { # no filename given
4986                         $diffinfo{'status'} = '2';
4987                         $diffinfo{'from_file'} = $hash_parent;
4988                         $diffinfo{'to_file'}   = $hash;
4989                 }
4990
4991                 # non-textual hash id's can be cached
4992                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4993                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4994                         $expires = '+1d';
4995                 }
4996
4997                 # open patch output
4998                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4999                         '-p', ($format eq 'html' ? "--full-index" : ()),
5000                         $hash_parent, $hash, "--"
5001                         or die_error(undef, "Open git-diff failed");
5002         } else  {
5003                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5004                         unless %diffinfo;
5005         }
5006
5007         # header
5008         if ($format eq 'html') {
5009                 my $formats_nav =
5010                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5011                                 "raw");
5012                 git_header_html(undef, $expires);
5013                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5014                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5015                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5016                 } else {
5017                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5018                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5019                 }
5020                 if (defined $file_name) {
5021                         git_print_page_path($file_name, "blob", $hash_base);
5022                 } else {
5023                         print "<div class=\"page_path\"></div>\n";
5024                 }
5025
5026         } elsif ($format eq 'plain') {
5027                 print $cgi->header(
5028                         -type => 'text/plain',
5029                         -charset => 'utf-8',
5030                         -expires => $expires,
5031                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5032
5033                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5034
5035         } else {
5036                 die_error(undef, "Unknown blobdiff format");
5037         }
5038
5039         # patch
5040         if ($format eq 'html') {
5041                 print "<div class=\"page_body\">\n";
5042
5043                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5044                 close $fd;
5045
5046                 print "</div>\n"; # class="page_body"
5047                 git_footer_html();
5048
5049         } else {
5050                 while (my $line = <$fd>) {
5051                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5052                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5053
5054                         print $line;
5055
5056                         last if $line =~ m!^\+\+\+!;
5057                 }
5058                 local $/ = undef;
5059                 print <$fd>;
5060                 close $fd;
5061         }
5062 }
5063
5064 sub git_blobdiff_plain {
5065         git_blobdiff('plain');
5066 }
5067
5068 sub git_commitdiff {
5069         my $format = shift || 'html';
5070         $hash ||= $hash_base || "HEAD";
5071         my %co = parse_commit($hash);
5072         if (!%co) {
5073                 die_error(undef, "Unknown commit object");
5074         }
5075
5076         # choose format for commitdiff for merge
5077         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5078                 $hash_parent = '--cc';
5079         }
5080         # we need to prepare $formats_nav before almost any parameter munging
5081         my $formats_nav;
5082         if ($format eq 'html') {
5083                 $formats_nav =
5084                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5085                                 "raw");
5086
5087                 if (defined $hash_parent &&
5088                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5089                         # commitdiff with two commits given
5090                         my $hash_parent_short = $hash_parent;
5091                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5092                                 $hash_parent_short = substr($hash_parent, 0, 7);
5093                         }
5094                         $formats_nav .=
5095                                 ' (from';
5096                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5097                                 if ($co{'parents'}[$i] eq $hash_parent) {
5098                                         $formats_nav .= ' parent ' . ($i+1);
5099                                         last;
5100                                 }
5101                         }
5102                         $formats_nav .= ': ' .
5103                                 $cgi->a({-href => href(action=>"commitdiff",
5104                                                        hash=>$hash_parent)},
5105                                         esc_html($hash_parent_short)) .
5106                                 ')';
5107                 } elsif (!$co{'parent'}) {
5108                         # --root commitdiff
5109                         $formats_nav .= ' (initial)';
5110                 } elsif (scalar @{$co{'parents'}} == 1) {
5111                         # single parent commit
5112                         $formats_nav .=
5113                                 ' (parent: ' .
5114                                 $cgi->a({-href => href(action=>"commitdiff",
5115                                                        hash=>$co{'parent'})},
5116                                         esc_html(substr($co{'parent'}, 0, 7))) .
5117                                 ')';
5118                 } else {
5119                         # merge commit
5120                         if ($hash_parent eq '--cc') {
5121                                 $formats_nav .= ' | ' .
5122                                         $cgi->a({-href => href(action=>"commitdiff",
5123                                                                hash=>$hash, hash_parent=>'-c')},
5124                                                 'combined');
5125                         } else { # $hash_parent eq '-c'
5126                                 $formats_nav .= ' | ' .
5127                                         $cgi->a({-href => href(action=>"commitdiff",
5128                                                                hash=>$hash, hash_parent=>'--cc')},
5129                                                 'compact');
5130                         }
5131                         $formats_nav .=
5132                                 ' (merge: ' .
5133                                 join(' ', map {
5134                                         $cgi->a({-href => href(action=>"commitdiff",
5135                                                                hash=>$_)},
5136                                                 esc_html(substr($_, 0, 7)));
5137                                 } @{$co{'parents'}} ) .
5138                                 ')';
5139                 }
5140         }
5141
5142         my $hash_parent_param = $hash_parent;
5143         if (!defined $hash_parent_param) {
5144                 # --cc for multiple parents, --root for parentless
5145                 $hash_parent_param =
5146                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5147         }
5148
5149         # read commitdiff
5150         my $fd;
5151         my @difftree;
5152         if ($format eq 'html') {
5153                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5154                         "--no-commit-id", "--patch-with-raw", "--full-index",
5155                         $hash_parent_param, $hash, "--"
5156                         or die_error(undef, "Open git-diff-tree failed");
5157
5158                 while (my $line = <$fd>) {
5159                         chomp $line;
5160                         # empty line ends raw part of diff-tree output
5161                         last unless $line;
5162                         push @difftree, scalar parse_difftree_raw_line($line);
5163                 }
5164
5165         } elsif ($format eq 'plain') {
5166                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5167                         '-p', $hash_parent_param, $hash, "--"
5168                         or die_error(undef, "Open git-diff-tree failed");
5169
5170         } else {
5171                 die_error(undef, "Unknown commitdiff format");
5172         }
5173
5174         # non-textual hash id's can be cached
5175         my $expires;
5176         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5177                 $expires = "+1d";
5178         }
5179
5180         # write commit message
5181         if ($format eq 'html') {
5182                 my $refs = git_get_references();
5183                 my $ref = format_ref_marker($refs, $co{'id'});
5184
5185                 git_header_html(undef, $expires);
5186                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5187                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5188                 git_print_authorship(\%co);
5189                 print "<div class=\"page_body\">\n";
5190                 if (@{$co{'comment'}} > 1) {
5191                         print "<div class=\"log\">\n";
5192                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5193                         print "</div>\n"; # class="log"
5194                 }
5195
5196         } elsif ($format eq 'plain') {
5197                 my $refs = git_get_references("tags");
5198                 my $tagname = git_get_rev_name_tags($hash);
5199                 my $filename = basename($project) . "-$hash.patch";
5200
5201                 print $cgi->header(
5202                         -type => 'text/plain',
5203                         -charset => 'utf-8',
5204                         -expires => $expires,
5205                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5206                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5207                 print "From: " . to_utf8($co{'author'}) . "\n";
5208                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5209                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5210
5211                 print "X-Git-Tag: $tagname\n" if $tagname;
5212                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5213
5214                 foreach my $line (@{$co{'comment'}}) {
5215                         print to_utf8($line) . "\n";
5216                 }
5217                 print "---\n\n";
5218         }
5219
5220         # write patch
5221         if ($format eq 'html') {
5222                 my $use_parents = !defined $hash_parent ||
5223                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5224                 git_difftree_body(\@difftree, $hash,
5225                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5226                 print "<br/>\n";
5227
5228                 git_patchset_body($fd, \@difftree, $hash,
5229                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5230                 close $fd;
5231                 print "</div>\n"; # class="page_body"
5232                 git_footer_html();
5233
5234         } elsif ($format eq 'plain') {
5235                 local $/ = undef;
5236                 print <$fd>;
5237                 close $fd
5238                         or print "Reading git-diff-tree failed\n";
5239         }
5240 }
5241
5242 sub git_commitdiff_plain {
5243         git_commitdiff('plain');
5244 }
5245
5246 sub git_history {
5247         if (!defined $hash_base) {
5248                 $hash_base = git_get_head_hash($project);
5249         }
5250         if (!defined $page) {
5251                 $page = 0;
5252         }
5253         my $ftype;
5254         my %co = parse_commit($hash_base);
5255         if (!%co) {
5256                 die_error(undef, "Unknown commit object");
5257         }
5258
5259         my $refs = git_get_references();
5260         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5261
5262         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5263                                        $file_name, "--full-history");
5264         if (!@commitlist) {
5265                 die_error('404 Not Found', "No such file or directory on given branch");
5266         }
5267
5268         if (!defined $hash && defined $file_name) {
5269                 # some commits could have deleted file in question,
5270                 # and not have it in tree, but one of them has to have it
5271                 for (my $i = 0; $i <= @commitlist; $i++) {
5272                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5273                         last if defined $hash;
5274                 }
5275         }
5276         if (defined $hash) {
5277                 $ftype = git_get_type($hash);
5278         }
5279         if (!defined $ftype) {
5280                 die_error(undef, "Unknown type of object");
5281         }
5282
5283         my $paging_nav = '';
5284         if ($page > 0) {
5285                 $paging_nav .=
5286                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5287                                                file_name=>$file_name)},
5288                                 "first");
5289                 $paging_nav .= " &sdot; " .
5290                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5291                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5292         } else {
5293                 $paging_nav .= "first";
5294                 $paging_nav .= " &sdot; prev";
5295         }
5296         my $next_link = '';
5297         if ($#commitlist >= 100) {
5298                 $next_link =
5299                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5300                                  -accesskey => "n", -title => "Alt-n"}, "next");
5301                 $paging_nav .= " &sdot; $next_link";
5302         } else {
5303                 $paging_nav .= " &sdot; next";
5304         }
5305
5306         git_header_html();
5307         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5308         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5309         git_print_page_path($file_name, $ftype, $hash_base);
5310
5311         git_history_body(\@commitlist, 0, 99,
5312                          $refs, $hash_base, $ftype, $next_link);
5313
5314         git_footer_html();
5315 }
5316
5317 sub git_search {
5318         my ($have_search) = gitweb_check_feature('search');
5319         if (!$have_search) {
5320                 die_error('403 Permission denied', "Permission denied");
5321         }
5322         if (!defined $searchtext) {
5323                 die_error(undef, "Text field empty");
5324         }
5325         if (!defined $hash) {
5326                 $hash = git_get_head_hash($project);
5327         }
5328         my %co = parse_commit($hash);
5329         if (!%co) {
5330                 die_error(undef, "Unknown commit object");
5331         }
5332         if (!defined $page) {
5333                 $page = 0;
5334         }
5335
5336         $searchtype ||= 'commit';
5337         if ($searchtype eq 'pickaxe') {
5338                 # pickaxe may take all resources of your box and run for several minutes
5339                 # with every query - so decide by yourself how public you make this feature
5340                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5341                 if (!$have_pickaxe) {
5342                         die_error('403 Permission denied', "Permission denied");
5343                 }
5344         }
5345         if ($searchtype eq 'grep') {
5346                 my ($have_grep) = gitweb_check_feature('grep');
5347                 if (!$have_grep) {
5348                         die_error('403 Permission denied', "Permission denied");
5349                 }
5350         }
5351
5352         git_header_html();
5353
5354         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5355                 my $greptype;
5356                 if ($searchtype eq 'commit') {
5357                         $greptype = "--grep=";
5358                 } elsif ($searchtype eq 'author') {
5359                         $greptype = "--author=";
5360                 } elsif ($searchtype eq 'committer') {
5361                         $greptype = "--committer=";
5362                 }
5363                 $greptype .= $searchtext;
5364                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5365                                                $greptype, '--regexp-ignore-case',
5366                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5367
5368                 my $paging_nav = '';
5369                 if ($page > 0) {
5370                         $paging_nav .=
5371                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5372                                                        searchtext=>$searchtext,
5373                                                        searchtype=>$searchtype)},
5374                                         "first");
5375                         $paging_nav .= " &sdot; " .
5376                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5377                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5378                 } else {
5379                         $paging_nav .= "first";
5380                         $paging_nav .= " &sdot; prev";
5381                 }
5382                 my $next_link = '';
5383                 if ($#commitlist >= 100) {
5384                         $next_link =
5385                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5386                                          -accesskey => "n", -title => "Alt-n"}, "next");
5387                         $paging_nav .= " &sdot; $next_link";
5388                 } else {
5389                         $paging_nav .= " &sdot; next";
5390                 }
5391
5392                 if ($#commitlist >= 100) {
5393                 }
5394
5395                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5396                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5397                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5398         }
5399
5400         if ($searchtype eq 'pickaxe') {
5401                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5402                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5403
5404                 print "<table class=\"pickaxe search\">\n";
5405                 my $alternate = 1;
5406                 $/ = "\n";
5407                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5408                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5409                         ($search_use_regexp ? '--pickaxe-regex' : ());
5410                 undef %co;
5411                 my @files;
5412                 while (my $line = <$fd>) {
5413                         chomp $line;
5414                         next unless $line;
5415
5416                         my %set = parse_difftree_raw_line($line);
5417                         if (defined $set{'commit'}) {
5418                                 # finish previous commit
5419                                 if (%co) {
5420                                         print "</td>\n" .
5421                                               "<td class=\"link\">" .
5422                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5423                                               " | " .
5424                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5425                                         print "</td>\n" .
5426                                               "</tr>\n";
5427                                 }
5428
5429                                 if ($alternate) {
5430                                         print "<tr class=\"dark\">\n";
5431                                 } else {
5432                                         print "<tr class=\"light\">\n";
5433                                 }
5434                                 $alternate ^= 1;
5435                                 %co = parse_commit($set{'commit'});
5436                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5437                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5438                                       "<td><i>$author</i></td>\n" .
5439                                       "<td>" .
5440                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5441                                               -class => "list subject"},
5442                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5443                         } elsif (defined $set{'to_id'}) {
5444                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5445
5446                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5447                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5448                                               -class => "list"},
5449                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5450                                       "<br/>\n";
5451                         }
5452                 }
5453                 close $fd;
5454
5455                 # finish last commit (warning: repetition!)
5456                 if (%co) {
5457                         print "</td>\n" .
5458                               "<td class=\"link\">" .
5459                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5460                               " | " .
5461                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5462                         print "</td>\n" .
5463                               "</tr>\n";
5464                 }
5465
5466                 print "</table>\n";
5467         }
5468
5469         if ($searchtype eq 'grep') {
5470                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5471                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5472
5473                 print "<table class=\"grep_search\">\n";
5474                 my $alternate = 1;
5475                 my $matches = 0;
5476                 $/ = "\n";
5477                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5478                         $search_use_regexp ? ('-E', '-i') : '-F',
5479                         $searchtext, $co{'tree'};
5480                 my $lastfile = '';
5481                 while (my $line = <$fd>) {
5482                         chomp $line;
5483                         my ($file, $lno, $ltext, $binary);
5484                         last if ($matches++ > 1000);
5485                         if ($line =~ /^Binary file (.+) matches$/) {
5486                                 $file = $1;
5487                                 $binary = 1;
5488                         } else {
5489                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5490                         }
5491                         if ($file ne $lastfile) {
5492                                 $lastfile and print "</td></tr>\n";
5493                                 if ($alternate++) {
5494                                         print "<tr class=\"dark\">\n";
5495                                 } else {
5496                                         print "<tr class=\"light\">\n";
5497                                 }
5498                                 print "<td class=\"list\">".
5499                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5500                                                                file_name=>"$file"),
5501                                                 -class => "list"}, esc_path($file));
5502                                 print "</td><td>\n";
5503                                 $lastfile = $file;
5504                         }
5505                         if ($binary) {
5506                                 print "<div class=\"binary\">Binary file</div>\n";
5507                         } else {
5508                                 $ltext = untabify($ltext);
5509                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5510                                         $ltext = esc_html($1, -nbsp=>1);
5511                                         $ltext .= '<span class="match">';
5512                                         $ltext .= esc_html($2, -nbsp=>1);
5513                                         $ltext .= '</span>';
5514                                         $ltext .= esc_html($3, -nbsp=>1);
5515                                 } else {
5516                                         $ltext = esc_html($ltext, -nbsp=>1);
5517                                 }
5518                                 print "<div class=\"pre\">" .
5519                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5520                                                                file_name=>"$file").'#l'.$lno,
5521                                                 -class => "linenr"}, sprintf('%4i', $lno))
5522                                         . ' ' .  $ltext . "</div>\n";
5523                         }
5524                 }
5525                 if ($lastfile) {
5526                         print "</td></tr>\n";
5527                         if ($matches > 1000) {
5528                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5529                         }
5530                 } else {
5531                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5532                 }
5533                 close $fd;
5534
5535                 print "</table>\n";
5536         }
5537         git_footer_html();
5538 }
5539
5540 sub git_search_help {
5541         git_header_html();
5542         git_print_page_nav('','', $hash,$hash,$hash);
5543         print <<EOT;
5544 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5545 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5546 the pattern entered is recognized as the POSIX extended
5547 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5548 insensitive).</p>
5549 <dl>
5550 <dt><b>commit</b></dt>
5551 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5552 EOT
5553         my ($have_grep) = gitweb_check_feature('grep');
5554         if ($have_grep) {
5555                 print <<EOT;
5556 <dt><b>grep</b></dt>
5557 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5558     a different one) are searched for the given pattern. On large trees, this search can take
5559 a while and put some strain on the server, so please use it with some consideration. Note that
5560 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5561 case-sensitive.</dd>
5562 EOT
5563         }
5564         print <<EOT;
5565 <dt><b>author</b></dt>
5566 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5567 <dt><b>committer</b></dt>
5568 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5569 EOT
5570         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5571         if ($have_pickaxe) {
5572                 print <<EOT;
5573 <dt><b>pickaxe</b></dt>
5574 <dd>All commits that caused the string to appear or disappear from any file (changes that
5575 added, removed or "modified" the string) will be listed. This search can take a while and
5576 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5577 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5578 EOT
5579         }
5580         print "</dl>\n";
5581         git_footer_html();
5582 }
5583
5584 sub git_shortlog {
5585         my $head = git_get_head_hash($project);
5586         if (!defined $hash) {
5587                 $hash = $head;
5588         }
5589         if (!defined $page) {
5590                 $page = 0;
5591         }
5592         my $refs = git_get_references();
5593
5594         my @commitlist = parse_commits($hash, 101, (100 * $page));
5595
5596         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5597         my $next_link = '';
5598         if ($#commitlist >= 100) {
5599                 $next_link =
5600                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5601                                  -accesskey => "n", -title => "Alt-n"}, "next");
5602         }
5603
5604         git_header_html();
5605         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5606         git_print_header_div('summary', $project);
5607
5608         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5609
5610         git_footer_html();
5611 }
5612
5613 ## ......................................................................
5614 ## feeds (RSS, Atom; OPML)
5615
5616 sub git_feed {
5617         my $format = shift || 'atom';
5618         my ($have_blame) = gitweb_check_feature('blame');
5619
5620         # Atom: http://www.atomenabled.org/developers/syndication/
5621         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5622         if ($format ne 'rss' && $format ne 'atom') {
5623                 die_error(undef, "Unknown web feed format");
5624         }
5625
5626         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5627         my $head = $hash || 'HEAD';
5628         my @commitlist = parse_commits($head, 150, 0, $file_name);
5629
5630         my %latest_commit;
5631         my %latest_date;
5632         my $content_type = "application/$format+xml";
5633         if (defined $cgi->http('HTTP_ACCEPT') &&
5634                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5635                 # browser (feed reader) prefers text/xml
5636                 $content_type = 'text/xml';
5637         }
5638         if (defined($commitlist[0])) {
5639                 %latest_commit = %{$commitlist[0]};
5640                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5641                 print $cgi->header(
5642                         -type => $content_type,
5643                         -charset => 'utf-8',
5644                         -last_modified => $latest_date{'rfc2822'});
5645         } else {
5646                 print $cgi->header(
5647                         -type => $content_type,
5648                         -charset => 'utf-8');
5649         }
5650
5651         # Optimization: skip generating the body if client asks only
5652         # for Last-Modified date.
5653         return if ($cgi->request_method() eq 'HEAD');
5654
5655         # header variables
5656         my $title = "$site_name - $project/$action";
5657         my $feed_type = 'log';
5658         if (defined $hash) {
5659                 $title .= " - '$hash'";
5660                 $feed_type = 'branch log';
5661                 if (defined $file_name) {
5662                         $title .= " :: $file_name";
5663                         $feed_type = 'history';
5664                 }
5665         } elsif (defined $file_name) {
5666                 $title .= " - $file_name";
5667                 $feed_type = 'history';
5668         }
5669         $title .= " $feed_type";
5670         my $descr = git_get_project_description($project);
5671         if (defined $descr) {
5672                 $descr = esc_html($descr);
5673         } else {
5674                 $descr = "$project " .
5675                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5676                          " feed";
5677         }
5678         my $owner = git_get_project_owner($project);
5679         $owner = esc_html($owner);
5680
5681         #header
5682         my $alt_url;
5683         if (defined $file_name) {
5684                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5685         } elsif (defined $hash) {
5686                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5687         } else {
5688                 $alt_url = href(-full=>1, action=>"summary");
5689         }
5690         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5691         if ($format eq 'rss') {
5692                 print <<XML;
5693 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5694 <channel>
5695 XML
5696                 print "<title>$title</title>\n" .
5697                       "<link>$alt_url</link>\n" .
5698                       "<description>$descr</description>\n" .
5699                       "<language>en</language>\n";
5700         } elsif ($format eq 'atom') {
5701                 print <<XML;
5702 <feed xmlns="http://www.w3.org/2005/Atom">
5703 XML
5704                 print "<title>$title</title>\n" .
5705                       "<subtitle>$descr</subtitle>\n" .
5706                       '<link rel="alternate" type="text/html" href="' .
5707                       $alt_url . '" />' . "\n" .
5708                       '<link rel="self" type="' . $content_type . '" href="' .
5709                       $cgi->self_url() . '" />' . "\n" .
5710                       "<id>" . href(-full=>1) . "</id>\n" .
5711                       # use project owner for feed author
5712                       "<author><name>$owner</name></author>\n";
5713                 if (defined $favicon) {
5714                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5715                 }
5716                 if (defined $logo_url) {
5717                         # not twice as wide as tall: 72 x 27 pixels
5718                         print "<logo>" . esc_url($logo) . "</logo>\n";
5719                 }
5720                 if (! %latest_date) {
5721                         # dummy date to keep the feed valid until commits trickle in:
5722                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5723                 } else {
5724                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5725                 }
5726         }
5727
5728         # contents
5729         for (my $i = 0; $i <= $#commitlist; $i++) {
5730                 my %co = %{$commitlist[$i]};
5731                 my $commit = $co{'id'};
5732                 # we read 150, we always show 30 and the ones more recent than 48 hours
5733                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5734                         last;
5735                 }
5736                 my %cd = parse_date($co{'author_epoch'});
5737
5738                 # get list of changed files
5739                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5740                         $co{'parent'} || "--root",
5741                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5742                         or next;
5743                 my @difftree = map { chomp; $_ } <$fd>;
5744                 close $fd
5745                         or next;
5746
5747                 # print element (entry, item)
5748                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5749                 if ($format eq 'rss') {
5750                         print "<item>\n" .
5751                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5752                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5753                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5754                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5755                               "<link>$co_url</link>\n" .
5756                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5757                               "<content:encoded>" .
5758                               "<![CDATA[\n";
5759                 } elsif ($format eq 'atom') {
5760                         print "<entry>\n" .
5761                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5762                               "<updated>$cd{'iso-8601'}</updated>\n" .
5763                               "<author>\n" .
5764                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5765                         if ($co{'author_email'}) {
5766                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5767                         }
5768                         print "</author>\n" .
5769                               # use committer for contributor
5770                               "<contributor>\n" .
5771                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5772                         if ($co{'committer_email'}) {
5773                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5774                         }
5775                         print "</contributor>\n" .
5776                               "<published>$cd{'iso-8601'}</published>\n" .
5777                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5778                               "<id>$co_url</id>\n" .
5779                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5780                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5781                 }
5782                 my $comment = $co{'comment'};
5783                 print "<pre>\n";
5784                 foreach my $line (@$comment) {
5785                         $line = esc_html($line);
5786                         print "$line\n";
5787                 }
5788                 print "</pre><ul>\n";
5789                 foreach my $difftree_line (@difftree) {
5790                         my %difftree = parse_difftree_raw_line($difftree_line);
5791                         next if !$difftree{'from_id'};
5792
5793                         my $file = $difftree{'file'} || $difftree{'to_file'};
5794
5795                         print "<li>" .
5796                               "[" .
5797                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5798                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5799                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5800                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5801                                       -title => "diff"}, 'D');
5802                         if ($have_blame) {
5803                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5804                                                              file_name=>$file, hash_base=>$commit),
5805                                               -title => "blame"}, 'B');
5806                         }
5807                         # if this is not a feed of a file history
5808                         if (!defined $file_name || $file_name ne $file) {
5809                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5810                                                              file_name=>$file, hash=>$commit),
5811                                               -title => "history"}, 'H');
5812                         }
5813                         $file = esc_path($file);
5814                         print "] ".
5815                               "$file</li>\n";
5816                 }
5817                 if ($format eq 'rss') {
5818                         print "</ul>]]>\n" .
5819                               "</content:encoded>\n" .
5820                               "</item>\n";
5821                 } elsif ($format eq 'atom') {
5822                         print "</ul>\n</div>\n" .
5823                               "</content>\n" .
5824                               "</entry>\n";
5825                 }
5826         }
5827
5828         # end of feed
5829         if ($format eq 'rss') {
5830                 print "</channel>\n</rss>\n";
5831         }       elsif ($format eq 'atom') {
5832                 print "</feed>\n";
5833         }
5834 }
5835
5836 sub git_rss {
5837         git_feed('rss');
5838 }
5839
5840 sub git_atom {
5841         git_feed('atom');
5842 }
5843
5844 sub git_opml {
5845         my @list = git_get_projects_list();
5846
5847         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5848         print <<XML;
5849 <?xml version="1.0" encoding="utf-8"?>
5850 <opml version="1.0">
5851 <head>
5852   <title>$site_name OPML Export</title>
5853 </head>
5854 <body>
5855 <outline text="git RSS feeds">
5856 XML
5857
5858         foreach my $pr (@list) {
5859                 my %proj = %$pr;
5860                 my $head = git_get_head_hash($proj{'path'});
5861                 if (!defined $head) {
5862                         next;
5863                 }
5864                 $git_dir = "$projectroot/$proj{'path'}";
5865                 my %co = parse_commit($head);
5866                 if (!%co) {
5867                         next;
5868                 }
5869
5870                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5871                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5872                 my $html = "$my_url?p=$proj{'path'};a=summary";
5873                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5874         }
5875         print <<XML;
5876 </outline>
5877 </body>
5878 </opml>
5879 XML
5880 }