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 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 if (my $path_info = $ENV{"PATH_INFO"}) {
  33         $my_url =~ s,\Q$path_info\E$,,;
  34         $my_uri =~ s,\Q$path_info\E$,,;
  35 }
  36
  37 # core git executable to use
  38 # this can just be "git" if your webserver has a sensible PATH
  39 our $GIT = "++GIT_BINDIR++/git";
  40
  41 # absolute fs-path which will be prepended to the project path
  42 #our $projectroot = "/pub/scm";
  43 our $projectroot = "++GITWEB_PROJECTROOT++";
  44
  45 # fs traversing limit for getting project list
  46 # the number is relative to the projectroot
  47 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  48
  49 # target of the home link on top of all pages
  50 our $home_link = $my_uri || "/";
  51
  52 # string of the home link on top of all pages
  53 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  54
  55 # name of your site or organization to appear in page titles
  56 # replace this with something more descriptive for clearer bookmarks
  57 our $site_name = "++GITWEB_SITENAME++"
  58                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  59
  60 # filename of html text to include at top of each page
  61 our $site_header = "++GITWEB_SITE_HEADER++";
  62 # html text to include at home page
  63 our $home_text = "++GITWEB_HOMETEXT++";
  64 # filename of html text to include at bottom of each page
  65 our $site_footer = "++GITWEB_SITE_FOOTER++";
  66
  67 # URI of stylesheets
  68 our @stylesheets = ("++GITWEB_CSS++");
  69 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  70 our $stylesheet = undef;
  71 # URI of GIT logo (72x27 size)
  72 our $logo = "++GITWEB_LOGO++";
  73 # URI of GIT favicon, assumed to be image/png type
  74 our $favicon = "++GITWEB_FAVICON++";
  75
  76 # URI and label (title) of GIT logo link
  77 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  78 #our $logo_label = "git documentation";
  79 our $logo_url = "http://git.or.cz/";
  80 our $logo_label = "git homepage";
  81
  82 # source of projects list
  83 our $projects_list = "++GITWEB_LIST++";
  84
  85 # the width (in characters) of the projects list "Description" column
  86 our $projects_list_description_width = 25;
  87
  88 # default order of projects list
  89 # valid values are none, project, descr, owner, and age
  90 our $default_projects_order = "project";
  91
  92 # show repository only if this file exists
  93 # (only effective if this variable evaluates to true)
  94 our $export_ok = "++GITWEB_EXPORT_OK++";
  95
  96 # only allow viewing of repositories also shown on the overview page
  97 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  98
  99 # list of git base URLs used for URL to where fetch project from,
 100 # i.e. full URL is "$git_base_url/$project"
 101 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 102
 103 # default blob_plain mimetype and default charset for text/plain blob
 104 our $default_blob_plain_mimetype = 'text/plain';
 105 our $default_text_plain_charset  = undef;
 106
 107 # file to use for guessing MIME types before trying /etc/mime.types
 108 # (relative to the current git repository)
 109 our $mimetypes_file = undef;
 110
 111 # assume this charset if line contains non-UTF-8 characters;
 112 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 113 # for which encoding all byte sequences are valid, for example
 114 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 115 # could be even 'utf-8' for the old behavior)
 116 our $fallback_encoding = 'latin1';
 117
 118 # rename detection options for git-diff and git-diff-tree
 119 # - default is '-M', with the cost proportional to
 120 #   (number of removed files) * (number of new files).
 121 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 122 #   (number of changed files + number of removed files) * (number of new files)
 123 # - even more costly is '-C', '--find-copies-harder' with cost
 124 #   (number of files in the original tree) * (number of new files)
 125 # - one might want to include '-B' option, e.g. '-B', '-M'
 126 our @diff_opts = ('-M'); # taken from git_commit
 127
 128 # information about snapshot formats that gitweb is capable of serving
 129 our %known_snapshot_formats = (
 130         # name => {
 131         #       'display' => display name,
 132         #       'type' => mime type,
 133         #       'suffix' => filename suffix,
 134         #       'format' => --format for git-archive,
 135         #       'compressor' => [compressor command and arguments]
 136         #                       (array reference, optional)}
 137         #
 138         'tgz' => {
 139                 'display' => 'tar.gz',
 140                 'type' => 'application/x-gzip',
 141                 'suffix' => '.tar.gz',
 142                 'format' => 'tar',
 143                 'compressor' => ['gzip']},
 144
 145         'tbz2' => {
 146                 'display' => 'tar.bz2',
 147                 'type' => 'application/x-bzip2',
 148                 'suffix' => '.tar.bz2',
 149                 'format' => 'tar',
 150                 'compressor' => ['bzip2']},
 151
 152         'zip' => {
 153                 'display' => 'zip',
 154                 'type' => 'application/x-zip',
 155                 'suffix' => '.zip',
 156                 'format' => 'zip'},
 157 );
 158
 159 # Aliases so we understand old gitweb.snapshot values in repository
 160 # configuration.
 161 our %known_snapshot_format_aliases = (
 162         'gzip'  => 'tgz',
 163         'bzip2' => 'tbz2',
 164
 165         # backward compatibility: legacy gitweb config support
 166         'x-gzip' => undef, 'gz' => undef,
 167         'x-bzip2' => undef, 'bz2' => undef,
 168         'x-zip' => undef, '' => undef,
 169 );
 170
 171 # You define site-wide feature defaults here; override them with
 172 # $GITWEB_CONFIG as necessary.
 173 our %feature = (
 174         # feature => {
 175         #       'sub' => feature-sub (subroutine),
 176         #       'override' => allow-override (boolean),
 177         #       'default' => [ default options...] (array reference)}
 178         #
 179         # if feature is overridable (it means that allow-override has true value),
 180         # then feature-sub will be called with default options as parameters;
 181         # return value of feature-sub indicates if to enable specified feature
 182         #
 183         # if there is no 'sub' key (no feature-sub), then feature cannot be
 184         # overriden
 185         #
 186         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 187
 188         # Enable the 'blame' blob view, showing the last commit that modified
 189         # each line in the file. This can be very CPU-intensive.
 190
 191         # To enable system wide have in $GITWEB_CONFIG
 192         # $feature{'blame'}{'default'} = [1];
 193         # To have project specific config enable override in $GITWEB_CONFIG
 194         # $feature{'blame'}{'override'} = 1;
 195         # and in project config gitweb.blame = 0|1;
 196         'blame' => {
 197                 'sub' => \&feature_blame,
 198                 'override' => 0,
 199                 'default' => [0]},
 200
 201         # Enable the 'snapshot' link, providing a compressed archive of any
 202         # tree. This can potentially generate high traffic if you have large
 203         # project.
 204
 205         # Value is a list of formats defined in %known_snapshot_formats that
 206         # you wish to offer.
 207         # To disable system wide have in $GITWEB_CONFIG
 208         # $feature{'snapshot'}{'default'} = [];
 209         # To have project specific config enable override in $GITWEB_CONFIG
 210         # $feature{'snapshot'}{'override'} = 1;
 211         # and in project config, a comma-separated list of formats or "none"
 212         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 213         'snapshot' => {
 214                 'sub' => \&feature_snapshot,
 215                 'override' => 0,
 216                 'default' => ['tgz']},
 217
 218         # Enable text search, which will list the commits which match author,
 219         # committer or commit text to a given string.  Enabled by default.
 220         # Project specific override is not supported.
 221         'search' => {
 222                 'override' => 0,
 223                 'default' => [1]},
 224
 225         # Enable grep search, which will list the files in currently selected
 226         # tree containing the given string. Enabled by default. This can be
 227         # potentially CPU-intensive, of course.
 228
 229         # To enable system wide have in $GITWEB_CONFIG
 230         # $feature{'grep'}{'default'} = [1];
 231         # To have project specific config enable override in $GITWEB_CONFIG
 232         # $feature{'grep'}{'override'} = 1;
 233         # and in project config gitweb.grep = 0|1;
 234         'grep' => {
 235                 'override' => 0,
 236                 'default' => [1]},
 237
 238         # Enable the pickaxe search, which will list the commits that modified
 239         # a given string in a file. This can be practical and quite faster
 240         # alternative to 'blame', but still potentially CPU-intensive.
 241
 242         # To enable system wide have in $GITWEB_CONFIG
 243         # $feature{'pickaxe'}{'default'} = [1];
 244         # To have project specific config enable override in $GITWEB_CONFIG
 245         # $feature{'pickaxe'}{'override'} = 1;
 246         # and in project config gitweb.pickaxe = 0|1;
 247         'pickaxe' => {
 248                 'sub' => \&feature_pickaxe,
 249                 'override' => 0,
 250                 'default' => [1]},
 251
 252         # Make gitweb use an alternative format of the URLs which can be
 253         # more readable and natural-looking: project name is embedded
 254         # directly in the path and the query string contains other
 255         # auxiliary information. All gitweb installations recognize
 256         # URL in either format; this configures in which formats gitweb
 257         # generates links.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'pathinfo'}{'default'} = [1];
 261         # Project specific override is not supported.
 262
 263         # Note that you will need to change the default location of CSS,
 264         # favicon, logo and possibly other files to an absolute URL. Also,
 265         # if gitweb.cgi serves as your indexfile, you will need to force
 266         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 267         'pathinfo' => {
 268                 'override' => 0,
 269                 'default' => [0]},
 270
 271         # Make gitweb consider projects in project root subdirectories
 272         # to be forks of existing projects. Given project $projname.git,
 273         # projects matching $projname/*.git will not be shown in the main
 274         # projects list, instead a '+' mark will be added to $projname
 275         # there and a 'forks' view will be enabled for the project, listing
 276         # all the forks. If project list is taken from a file, forks have
 277         # to be listed after the main project.
 278
 279         # To enable system wide have in $GITWEB_CONFIG
 280         # $feature{'forks'}{'default'} = [1];
 281         # Project specific override is not supported.
 282         'forks' => {
 283                 'override' => 0,
 284                 'default' => [0]},
 285
 286         # Insert custom links to the action bar of all project pages.
 287         # This enables you mainly to link to third-party scripts integrating
 288         # into gitweb; e.g. git-browser for graphical history representation
 289         # or custom web-based repository administration interface.
 290
 291         # The 'default' value consists of a list of triplets in the form
 292         # (label, link, position) where position is the label after which
 293         # to insert the link and link is a format string where %n expands
 294         # to the project name, %f to the project path within the filesystem,
 295         # %h to the current hash (h gitweb parameter) and %b to the current
 296         # hash base (hb gitweb parameter); %% expands to %.
 297
 298         # To enable system wide have in $GITWEB_CONFIG e.g.
 299         # $feature{'actions'}{'default'} = [('graphiclog',
 300         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 301         # Project specific override is not supported.
 302         'actions' => {
 303                 'override' => 0,
 304                 'default' => []},
 305
 306         # Allow gitweb scan project content tags described in ctags/
 307         # of project repository, and display the popular Web 2.0-ish
 308         # "tag cloud" near the project list. Note that this is something
 309         # COMPLETELY different from the normal Git tags.
 310
 311         # gitweb by itself can show existing tags, but it does not handle
 312         # tagging itself; you need an external application for that.
 313         # For an example script, check Girocco's cgi/tagproj.cgi.
 314         # You may want to install the HTML::TagCloud Perl module to get
 315         # a pretty tag cloud instead of just a list of tags.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 319         # Project specific override is not supported.
 320         'ctags' => {
 321                 'override' => 0,
 322                 'default' => [0]},
 323 );
 324
 325 sub gitweb_check_feature {
 326         my ($name) = @_;
 327         return unless exists $feature{$name};
 328         my ($sub, $override, @defaults) = (
 329                 $feature{$name}{'sub'},
 330                 $feature{$name}{'override'},
 331                 @{$feature{$name}{'default'}});
 332         if (!$override) { return @defaults; }
 333         if (!defined $sub) {
 334                 warn "feature $name is not overrideable";
 335                 return @defaults;
 336         }
 337         return $sub->(@defaults);
 338 }
 339
 340 sub feature_blame {
 341         my ($val) = git_get_project_config('blame', '--bool');
 342
 343         if ($val eq 'true') {
 344                 return 1;
 345         } elsif ($val eq 'false') {
 346                 return 0;
 347         }
 348
 349         return $_[0];
 350 }
 351
 352 sub feature_snapshot {
 353         my (@fmts) = @_;
 354
 355         my ($val) = git_get_project_config('snapshot');
 356
 357         if ($val) {
 358                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 359         }
 360
 361         return @fmts;
 362 }
 363
 364 sub feature_grep {
 365         my ($val) = git_get_project_config('grep', '--bool');
 366
 367         if ($val eq 'true') {
 368                 return (1);
 369         } elsif ($val eq 'false') {
 370                 return (0);
 371         }
 372
 373         return ($_[0]);
 374 }
 375
 376 sub feature_pickaxe {
 377         my ($val) = git_get_project_config('pickaxe', '--bool');
 378
 379         if ($val eq 'true') {
 380                 return (1);
 381         } elsif ($val eq 'false') {
 382                 return (0);
 383         }
 384
 385         return ($_[0]);
 386 }
 387
 388 # checking HEAD file with -e is fragile if the repository was
 389 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 390 # and then pruned.
 391 sub check_head_link {
 392         my ($dir) = @_;
 393         my $headfile = "$dir/HEAD";
 394         return ((-e $headfile) ||
 395                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 396 }
 397
 398 sub check_export_ok {
 399         my ($dir) = @_;
 400         return (check_head_link($dir) &&
 401                 (!$export_ok || -e "$dir/$export_ok"));
 402 }
 403
 404 # process alternate names for backward compatibility
 405 # filter out unsupported (unknown) snapshot formats
 406 sub filter_snapshot_fmts {
 407         my @fmts = @_;
 408
 409         @fmts = map {
 410                 exists $known_snapshot_format_aliases{$_} ?
 411                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 412         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 413
 414 }
 415
 416 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 417 if (-e $GITWEB_CONFIG) {
 418         do $GITWEB_CONFIG;
 419 } else {
 420         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 421         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 422 }
 423
 424 # version of the core git binary
 425 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 426
 427 $projects_list ||= $projectroot;
 428
 429 # ======================================================================
 430 # input validation and dispatch
 431 our $action = $cgi->param('a');
 432 if (defined $action) {
 433         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 434                 die_error(400, "Invalid action parameter");
 435         }
 436 }
 437
 438 # parameters which are pathnames
 439 our $project = $cgi->param('p');
 440 if (defined $project) {
 441         if (!validate_pathname($project) ||
 442             !(-d "$projectroot/$project") ||
 443             !check_head_link("$projectroot/$project") ||
 444             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 445             ($strict_export && !project_in_list($project))) {
 446                 undef $project;
 447                 die_error(404, "No such project");
 448         }
 449 }
 450
 451 our $file_name = $cgi->param('f');
 452 if (defined $file_name) {
 453         if (!validate_pathname($file_name)) {
 454                 die_error(400, "Invalid file parameter");
 455         }
 456 }
 457
 458 our $file_parent = $cgi->param('fp');
 459 if (defined $file_parent) {
 460         if (!validate_pathname($file_parent)) {
 461                 die_error(400, "Invalid file parent parameter");
 462         }
 463 }
 464
 465 # parameters which are refnames
 466 our $hash = $cgi->param('h');
 467 if (defined $hash) {
 468         if (!validate_refname($hash)) {
 469                 die_error(400, "Invalid hash parameter");
 470         }
 471 }
 472
 473 our $hash_parent = $cgi->param('hp');
 474 if (defined $hash_parent) {
 475         if (!validate_refname($hash_parent)) {
 476                 die_error(400, "Invalid hash parent parameter");
 477         }
 478 }
 479
 480 our $hash_base = $cgi->param('hb');
 481 if (defined $hash_base) {
 482         if (!validate_refname($hash_base)) {
 483                 die_error(400, "Invalid hash base parameter");
 484         }
 485 }
 486
 487 my %allowed_options = (
 488         "--no-merges" => [ qw(rss atom log shortlog history) ],
 489 );
 490
 491 our @extra_options = $cgi->param('opt');
 492 if (defined @extra_options) {
 493         foreach my $opt (@extra_options) {
 494                 if (not exists $allowed_options{$opt}) {
 495                         die_error(400, "Invalid option parameter");
 496                 }
 497                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 498                         die_error(400, "Invalid option parameter for this action");
 499                 }
 500         }
 501 }
 502
 503 our $hash_parent_base = $cgi->param('hpb');
 504 if (defined $hash_parent_base) {
 505         if (!validate_refname($hash_parent_base)) {
 506                 die_error(400, "Invalid hash parent base parameter");
 507         }
 508 }
 509
 510 # other parameters
 511 our $page = $cgi->param('pg');
 512 if (defined $page) {
 513         if ($page =~ m/[^0-9]/) {
 514                 die_error(400, "Invalid page parameter");
 515         }
 516 }
 517
 518 our $searchtype = $cgi->param('st');
 519 if (defined $searchtype) {
 520         if ($searchtype =~ m/[^a-z]/) {
 521                 die_error(400, "Invalid searchtype parameter");
 522         }
 523 }
 524
 525 our $search_use_regexp = $cgi->param('sr');
 526
 527 our $searchtext = $cgi->param('s');
 528 our $search_regexp;
 529 if (defined $searchtext) {
 530         if (length($searchtext) < 2) {
 531                 die_error(403, "At least two characters are required for search parameter");
 532         }
 533         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 534 }
 535
 536 # now read PATH_INFO and use it as alternative to parameters
 537 sub evaluate_path_info {
 538         return if defined $project;
 539         my $path_info = $ENV{"PATH_INFO"};
 540         return if !$path_info;
 541         $path_info =~ s,^/+,,;
 542         return if !$path_info;
 543         # find which part of PATH_INFO is project
 544         $project = $path_info;
 545         $project =~ s,/+$,,;
 546         while ($project && !check_head_link("$projectroot/$project")) {
 547                 $project =~ s,/*[^/]*$,,;
 548         }
 549         # validate project
 550         $project = validate_pathname($project);
 551         if (!$project ||
 552             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 553             ($strict_export && !project_in_list($project))) {
 554                 undef $project;
 555                 return;
 556         }
 557         # do not change any parameters if an action is given using the query string
 558         return if $action;
 559         $path_info =~ s,^\Q$project\E/*,,;
 560         my ($refname, $pathname) = split(/:/, $path_info, 2);
 561         if (defined $pathname) {
 562                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 563                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 564                 $pathname =~ s,^/+,,;
 565                 if (!$pathname || substr($pathname, -1) eq "/") {
 566                         $action  ||= "tree";
 567                         $pathname =~ s,/$,,;
 568                 } else {
 569                         $action  ||= "blob_plain";
 570                 }
 571                 $hash_base ||= validate_refname($refname);
 572                 $file_name ||= validate_pathname($pathname);
 573         } elsif (defined $refname) {
 574                 # we got "project.git/branch"
 575                 $action ||= "shortlog";
 576                 $hash   ||= validate_refname($refname);
 577         }
 578 }
 579 evaluate_path_info();
 580
 581 # path to the current git repository
 582 our $git_dir;
 583 $git_dir = "$projectroot/$project" if $project;
 584
 585 # dispatch
 586 my %actions = (
 587         "blame" => \&git_blame,
 588         "blobdiff" => \&git_blobdiff,
 589         "blobdiff_plain" => \&git_blobdiff_plain,
 590         "blob" => \&git_blob,
 591         "blob_plain" => \&git_blob_plain,
 592         "commitdiff" => \&git_commitdiff,
 593         "commitdiff_plain" => \&git_commitdiff_plain,
 594         "commit" => \&git_commit,
 595         "forks" => \&git_forks,
 596         "heads" => \&git_heads,
 597         "history" => \&git_history,
 598         "log" => \&git_log,
 599         "rss" => \&git_rss,
 600         "atom" => \&git_atom,
 601         "search" => \&git_search,
 602         "search_help" => \&git_search_help,
 603         "shortlog" => \&git_shortlog,
 604         "summary" => \&git_summary,
 605         "tag" => \&git_tag,
 606         "tags" => \&git_tags,
 607         "tree" => \&git_tree,
 608         "snapshot" => \&git_snapshot,
 609         "object" => \&git_object,
 610         # those below don't need $project
 611         "opml" => \&git_opml,
 612         "project_list" => \&git_project_list,
 613         "project_index" => \&git_project_index,
 614 );
 615
 616 if (!defined $action) {
 617         if (defined $hash) {
 618                 $action = git_get_type($hash);
 619         } elsif (defined $hash_base && defined $file_name) {
 620                 $action = git_get_type("$hash_base:$file_name");
 621         } elsif (defined $project) {
 622                 $action = 'summary';
 623         } else {
 624                 $action = 'project_list';
 625         }
 626 }
 627 if (!defined($actions{$action})) {
 628         die_error(400, "Unknown action");
 629 }
 630 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 631     !$project) {
 632         die_error(400, "Project needed");
 633 }
 634 $actions{$action}->();
 635 exit;
 636
 637 ## ======================================================================
 638 ## action links
 639
 640 sub href (%) {
 641         my %params = @_;
 642         # default is to use -absolute url() i.e. $my_uri
 643         my $href = $params{-full} ? $my_url : $my_uri;
 644
 645         # XXX: Warning: If you touch this, check the search form for updating,
 646         # too.
 647
 648         my @mapping = (
 649                 project => "p",
 650                 action => "a",
 651                 file_name => "f",
 652                 file_parent => "fp",
 653                 hash => "h",
 654                 hash_parent => "hp",
 655                 hash_base => "hb",
 656                 hash_parent_base => "hpb",
 657                 page => "pg",
 658                 order => "o",
 659                 searchtext => "s",
 660                 searchtype => "st",
 661                 snapshot_format => "sf",
 662                 extra_options => "opt",
 663                 search_use_regexp => "sr",
 664         );
 665         my %mapping = @mapping;
 666
 667         $params{'project'} = $project unless exists $params{'project'};
 668
 669         if ($params{-replay}) {
 670                 while (my ($name, $symbol) = each %mapping) {
 671                         if (!exists $params{$name}) {
 672                                 # to allow for multivalued params we use arrayref form
 673                                 $params{$name} = [ $cgi->param($symbol) ];
 674                         }
 675                 }
 676         }
 677
 678         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 679         if ($use_pathinfo) {
 680                 # use PATH_INFO for project name
 681                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 682                 delete $params{'project'};
 683
 684                 # Summary just uses the project path URL
 685                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 686                         delete $params{'action'};
 687                 }
 688         }
 689
 690         # now encode the parameters explicitly
 691         my @result = ();
 692         for (my $i = 0; $i < @mapping; $i += 2) {
 693                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 694                 if (defined $params{$name}) {
 695                         if (ref($params{$name}) eq "ARRAY") {
 696                                 foreach my $par (@{$params{$name}}) {
 697                                         push @result, $symbol . "=" . esc_param($par);
 698                                 }
 699                         } else {
 700                                 push @result, $symbol . "=" . esc_param($params{$name});
 701                         }
 702                 }
 703         }
 704         $href .= "?" . join(';', @result) if scalar @result;
 705
 706         return $href;
 707 }
 708
 709
 710 ## ======================================================================
 711 ## validation, quoting/unquoting and escaping
 712
 713 sub validate_pathname {
 714         my $input = shift || return undef;
 715
 716         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 717         # at the beginning, at the end, and between slashes.
 718         # also this catches doubled slashes
 719         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 720                 return undef;
 721         }
 722         # no null characters
 723         if ($input =~ m!\0!) {
 724                 return undef;
 725         }
 726         return $input;
 727 }
 728
 729 sub validate_refname {
 730         my $input = shift || return undef;
 731
 732         # textual hashes are O.K.
 733         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 734                 return $input;
 735         }
 736         # it must be correct pathname
 737         $input = validate_pathname($input)
 738                 or return undef;
 739         # restrictions on ref name according to git-check-ref-format
 740         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 741                 return undef;
 742         }
 743         return $input;
 744 }
 745
 746 # decode sequences of octets in utf8 into Perl's internal form,
 747 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 748 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 749 sub to_utf8 {
 750         my $str = shift;
 751         if (utf8::valid($str)) {
 752                 utf8::decode($str);
 753                 return $str;
 754         } else {
 755                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 756         }
 757 }
 758
 759 # quote unsafe chars, but keep the slash, even when it's not
 760 # correct, but quoted slashes look too horrible in bookmarks
 761 sub esc_param {
 762         my $str = shift;
 763         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 764         $str =~ s/\+/%2B/g;
 765         $str =~ s/ /\+/g;
 766         return $str;
 767 }
 768
 769 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 770 sub esc_url {
 771         my $str = shift;
 772         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 773         $str =~ s/\+/%2B/g;
 774         $str =~ s/ /\+/g;
 775         return $str;
 776 }
 777
 778 # replace invalid utf8 character with SUBSTITUTION sequence
 779 sub esc_html ($;%) {
 780         my $str = shift;
 781         my %opts = @_;
 782
 783         $str = to_utf8($str);
 784         $str = $cgi->escapeHTML($str);
 785         if ($opts{'-nbsp'}) {
 786                 $str =~ s/ /&nbsp;/g;
 787         }
 788         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 789         return $str;
 790 }
 791
 792 # quote control characters and escape filename to HTML
 793 sub esc_path {
 794         my $str = shift;
 795         my %opts = @_;
 796
 797         $str = to_utf8($str);
 798         $str = $cgi->escapeHTML($str);
 799         if ($opts{'-nbsp'}) {
 800                 $str =~ s/ /&nbsp;/g;
 801         }
 802         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 803         return $str;
 804 }
 805
 806 # Make control characters "printable", using character escape codes (CEC)
 807 sub quot_cec {
 808         my $cntrl = shift;
 809         my %opts = @_;
 810         my %es = ( # character escape codes, aka escape sequences
 811                 "\t" => '\t',   # tab            (HT)
 812                 "\n" => '\n',   # line feed      (LF)
 813                 "\r" => '\r',   # carrige return (CR)
 814                 "\f" => '\f',   # form feed      (FF)
 815                 "\b" => '\b',   # backspace      (BS)
 816                 "\a" => '\a',   # alarm (bell)   (BEL)
 817                 "\e" => '\e',   # escape         (ESC)
 818                 "\013" => '\v', # vertical tab   (VT)
 819                 "\000" => '\0', # nul character  (NUL)
 820         );
 821         my $chr = ( (exists $es{$cntrl})
 822                     ? $es{$cntrl}
 823                     : sprintf('\%2x', ord($cntrl)) );
 824         if ($opts{-nohtml}) {
 825                 return $chr;
 826         } else {
 827                 return "<span class=\"cntrl\">$chr</span>";
 828         }
 829 }
 830
 831 # Alternatively use unicode control pictures codepoints,
 832 # Unicode "printable representation" (PR)
 833 sub quot_upr {
 834         my $cntrl = shift;
 835         my %opts = @_;
 836
 837         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 838         if ($opts{-nohtml}) {
 839                 return $chr;
 840         } else {
 841                 return "<span class=\"cntrl\">$chr</span>";
 842         }
 843 }
 844
 845 # git may return quoted and escaped filenames
 846 sub unquote {
 847         my $str = shift;
 848
 849         sub unq {
 850                 my $seq = shift;
 851                 my %es = ( # character escape codes, aka escape sequences
 852                         't' => "\t",   # tab            (HT, TAB)
 853                         'n' => "\n",   # newline        (NL)
 854                         'r' => "\r",   # return         (CR)
 855                         'f' => "\f",   # form feed      (FF)
 856                         'b' => "\b",   # backspace      (BS)
 857                         'a' => "\a",   # alarm (bell)   (BEL)
 858                         'e' => "\e",   # escape         (ESC)
 859                         'v' => "\013", # vertical tab   (VT)
 860                 );
 861
 862                 if ($seq =~ m/^[0-7]{1,3}$/) {
 863                         # octal char sequence
 864                         return chr(oct($seq));
 865                 } elsif (exists $es{$seq}) {
 866                         # C escape sequence, aka character escape code
 867                         return $es{$seq};
 868                 }
 869                 # quoted ordinary character
 870                 return $seq;
 871         }
 872
 873         if ($str =~ m/^"(.*)"$/) {
 874                 # needs unquoting
 875                 $str = $1;
 876                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 877         }
 878         return $str;
 879 }
 880
 881 # escape tabs (convert tabs to spaces)
 882 sub untabify {
 883         my $line = shift;
 884
 885         while ((my $pos = index($line, "\t")) != -1) {
 886                 if (my $count = (8 - ($pos % 8))) {
 887                         my $spaces = ' ' x $count;
 888                         $line =~ s/\t/$spaces/;
 889                 }
 890         }
 891
 892         return $line;
 893 }
 894
 895 sub project_in_list {
 896         my $project = shift;
 897         my @list = git_get_projects_list();
 898         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 899 }
 900
 901 ## ----------------------------------------------------------------------
 902 ## HTML aware string manipulation
 903
 904 # Try to chop given string on a word boundary between position
 905 # $len and $len+$add_len. If there is no word boundary there,
 906 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 907 # (marking chopped part) would be longer than given string.
 908 sub chop_str {
 909         my $str = shift;
 910         my $len = shift;
 911         my $add_len = shift || 10;
 912         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 913
 914         # Make sure perl knows it is utf8 encoded so we don't
 915         # cut in the middle of a utf8 multibyte char.
 916         $str = to_utf8($str);
 917
 918         # allow only $len chars, but don't cut a word if it would fit in $add_len
 919         # if it doesn't fit, cut it if it's still longer than the dots we would add
 920         # remove chopped character entities entirely
 921
 922         # when chopping in the middle, distribute $len into left and right part
 923         # return early if chopping wouldn't make string shorter
 924         if ($where eq 'center') {
 925                 return $str if ($len + 5 >= length($str)); # filler is length 5
 926                 $len = int($len/2);
 927         } else {
 928                 return $str if ($len + 4 >= length($str)); # filler is length 4
 929         }
 930
 931         # regexps: ending and beginning with word part up to $add_len
 932         my $endre = qr/.{$len}\w{0,$add_len}/;
 933         my $begre = qr/\w{0,$add_len}.{$len}/;
 934
 935         if ($where eq 'left') {
 936                 $str =~ m/^(.*?)($begre)$/;
 937                 my ($lead, $body) = ($1, $2);
 938                 if (length($lead) > 4) {
 939                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 940                         $lead = " ...";
 941                 }
 942                 return "$lead$body";
 943
 944         } elsif ($where eq 'center') {
 945                 $str =~ m/^($endre)(.*)$/;
 946                 my ($left, $str)  = ($1, $2);
 947                 $str =~ m/^(.*?)($begre)$/;
 948                 my ($mid, $right) = ($1, $2);
 949                 if (length($mid) > 5) {
 950                         $left  =~ s/&[^;]*$//;
 951                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 952                         $mid = " ... ";
 953                 }
 954                 return "$left$mid$right";
 955
 956         } else {
 957                 $str =~ m/^($endre)(.*)$/;
 958                 my $body = $1;
 959                 my $tail = $2;
 960                 if (length($tail) > 4) {
 961                         $body =~ s/&[^;]*$//;
 962                         $tail = "... ";
 963                 }
 964                 return "$body$tail";
 965         }
 966 }
 967
 968 # takes the same arguments as chop_str, but also wraps a <span> around the
 969 # result with a title attribute if it does get chopped. Additionally, the
 970 # string is HTML-escaped.
 971 sub chop_and_escape_str {
 972         my ($str) = @_;
 973
 974         my $chopped = chop_str(@_);
 975         if ($chopped eq $str) {
 976                 return esc_html($chopped);
 977         } else {
 978                 $str =~ s/([[:cntrl:]])/?/g;
 979                 return $cgi->span({-title=>$str}, esc_html($chopped));
 980         }
 981 }
 982
 983 ## ----------------------------------------------------------------------
 984 ## functions returning short strings
 985
 986 # CSS class for given age value (in seconds)
 987 sub age_class {
 988         my $age = shift;
 989
 990         if (!defined $age) {
 991                 return "noage";
 992         } elsif ($age < 60*60*2) {
 993                 return "age0";
 994         } elsif ($age < 60*60*24*2) {
 995                 return "age1";
 996         } else {
 997                 return "age2";
 998         }
 999 }
1000
1001 # convert age in seconds to "nn units ago" string
1002 sub age_string {
1003         my $age = shift;
1004         my $age_str;
1005
1006         if ($age > 60*60*24*365*2) {
1007                 $age_str = (int $age/60/60/24/365);
1008                 $age_str .= " years ago";
1009         } elsif ($age > 60*60*24*(365/12)*2) {
1010                 $age_str = int $age/60/60/24/(365/12);
1011                 $age_str .= " months ago";
1012         } elsif ($age > 60*60*24*7*2) {
1013                 $age_str = int $age/60/60/24/7;
1014                 $age_str .= " weeks ago";
1015         } elsif ($age > 60*60*24*2) {
1016                 $age_str = int $age/60/60/24;
1017                 $age_str .= " days ago";
1018         } elsif ($age > 60*60*2) {
1019                 $age_str = int $age/60/60;
1020                 $age_str .= " hours ago";
1021         } elsif ($age > 60*2) {
1022                 $age_str = int $age/60;
1023                 $age_str .= " min ago";
1024         } elsif ($age > 2) {
1025                 $age_str = int $age;
1026                 $age_str .= " sec ago";
1027         } else {
1028                 $age_str .= " right now";
1029         }
1030         return $age_str;
1031 }
1032
1033 use constant {
1034         S_IFINVALID => 0030000,
1035         S_IFGITLINK => 0160000,
1036 };
1037
1038 # submodule/subproject, a commit object reference
1039 sub S_ISGITLINK($) {
1040         my $mode = shift;
1041
1042         return (($mode & S_IFMT) == S_IFGITLINK)
1043 }
1044
1045 # convert file mode in octal to symbolic file mode string
1046 sub mode_str {
1047         my $mode = oct shift;
1048
1049         if (S_ISGITLINK($mode)) {
1050                 return 'm---------';
1051         } elsif (S_ISDIR($mode & S_IFMT)) {
1052                 return 'drwxr-xr-x';
1053         } elsif (S_ISLNK($mode)) {
1054                 return 'lrwxrwxrwx';
1055         } elsif (S_ISREG($mode)) {
1056                 # git cares only about the executable bit
1057                 if ($mode & S_IXUSR) {
1058                         return '-rwxr-xr-x';
1059                 } else {
1060                         return '-rw-r--r--';
1061                 };
1062         } else {
1063                 return '----------';
1064         }
1065 }
1066
1067 # convert file mode in octal to file type string
1068 sub file_type {
1069         my $mode = shift;
1070
1071         if ($mode !~ m/^[0-7]+$/) {
1072                 return $mode;
1073         } else {
1074                 $mode = oct $mode;
1075         }
1076
1077         if (S_ISGITLINK($mode)) {
1078                 return "submodule";
1079         } elsif (S_ISDIR($mode & S_IFMT)) {
1080                 return "directory";
1081         } elsif (S_ISLNK($mode)) {
1082                 return "symlink";
1083         } elsif (S_ISREG($mode)) {
1084                 return "file";
1085         } else {
1086                 return "unknown";
1087         }
1088 }
1089
1090 # convert file mode in octal to file type description string
1091 sub file_type_long {
1092         my $mode = shift;
1093
1094         if ($mode !~ m/^[0-7]+$/) {
1095                 return $mode;
1096         } else {
1097                 $mode = oct $mode;
1098         }
1099
1100         if (S_ISGITLINK($mode)) {
1101                 return "submodule";
1102         } elsif (S_ISDIR($mode & S_IFMT)) {
1103                 return "directory";
1104         } elsif (S_ISLNK($mode)) {
1105                 return "symlink";
1106         } elsif (S_ISREG($mode)) {
1107                 if ($mode & S_IXUSR) {
1108                         return "executable";
1109                 } else {
1110                         return "file";
1111                 };
1112         } else {
1113                 return "unknown";
1114         }
1115 }
1116
1117
1118 ## ----------------------------------------------------------------------
1119 ## functions returning short HTML fragments, or transforming HTML fragments
1120 ## which don't belong to other sections
1121
1122 # format line of commit message.
1123 sub format_log_line_html {
1124         my $line = shift;
1125
1126         $line = esc_html($line, -nbsp=>1);
1127         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1128                 my $hash_text = $1;
1129                 my $link =
1130                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1131                                 -class => "text"}, $hash_text);
1132                 $line =~ s/$hash_text/$link/;
1133         }
1134         return $line;
1135 }
1136
1137 # format marker of refs pointing to given object
1138
1139 # the destination action is chosen based on object type and current context:
1140 # - for annotated tags, we choose the tag view unless it's the current view
1141 #   already, in which case we go to shortlog view
1142 # - for other refs, we keep the current view if we're in history, shortlog or
1143 #   log view, and select shortlog otherwise
1144 sub format_ref_marker {
1145         my ($refs, $id) = @_;
1146         my $markers = '';
1147
1148         if (defined $refs->{$id}) {
1149                 foreach my $ref (@{$refs->{$id}}) {
1150                         # this code exploits the fact that non-lightweight tags are the
1151                         # only indirect objects, and that they are the only objects for which
1152                         # we want to use tag instead of shortlog as action
1153                         my ($type, $name) = qw();
1154                         my $indirect = ($ref =~ s/\^\{\}$//);
1155                         # e.g. tags/v2.6.11 or heads/next
1156                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1157                                 $type = $1;
1158                                 $name = $2;
1159                         } else {
1160                                 $type = "ref";
1161                                 $name = $ref;
1162                         }
1163
1164                         my $class = $type;
1165                         $class .= " indirect" if $indirect;
1166
1167                         my $dest_action = "shortlog";
1168
1169                         if ($indirect) {
1170                                 $dest_action = "tag" unless $action eq "tag";
1171                         } elsif ($action =~ /^(history|(short)?log)$/) {
1172                                 $dest_action = $action;
1173                         }
1174
1175                         my $dest = "";
1176                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1177                         $dest .= $ref;
1178
1179                         my $link = $cgi->a({
1180                                 -href => href(
1181                                         action=>$dest_action,
1182                                         hash=>$dest
1183                                 )}, $name);
1184
1185                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1186                                 $link . "</span>";
1187                 }
1188         }
1189
1190         if ($markers) {
1191                 return ' <span class="refs">'. $markers . '</span>';
1192         } else {
1193                 return "";
1194         }
1195 }
1196
1197 # format, perhaps shortened and with markers, title line
1198 sub format_subject_html {
1199         my ($long, $short, $href, $extra) = @_;
1200         $extra = '' unless defined($extra);
1201
1202         if (length($short) < length($long)) {
1203                 return $cgi->a({-href => $href, -class => "list subject",
1204                                 -title => to_utf8($long)},
1205                        esc_html($short) . $extra);
1206         } else {
1207                 return $cgi->a({-href => $href, -class => "list subject"},
1208                        esc_html($long)  . $extra);
1209         }
1210 }
1211
1212 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1213 sub format_git_diff_header_line {
1214         my $line = shift;
1215         my $diffinfo = shift;
1216         my ($from, $to) = @_;
1217
1218         if ($diffinfo->{'nparents'}) {
1219                 # combined diff
1220                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1221                 if ($to->{'href'}) {
1222                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1223                                          esc_path($to->{'file'}));
1224                 } else { # file was deleted (no href)
1225                         $line .= esc_path($to->{'file'});
1226                 }
1227         } else {
1228                 # "ordinary" diff
1229                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1230                 if ($from->{'href'}) {
1231                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1232                                          'a/' . esc_path($from->{'file'}));
1233                 } else { # file was added (no href)
1234                         $line .= 'a/' . esc_path($from->{'file'});
1235                 }
1236                 $line .= ' ';
1237                 if ($to->{'href'}) {
1238                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1239                                          'b/' . esc_path($to->{'file'}));
1240                 } else { # file was deleted
1241                         $line .= 'b/' . esc_path($to->{'file'});
1242                 }
1243         }
1244
1245         return "<div class=\"diff header\">$line</div>\n";
1246 }
1247
1248 # format extended diff header line, before patch itself
1249 sub format_extended_diff_header_line {
1250         my $line = shift;
1251         my $diffinfo = shift;
1252         my ($from, $to) = @_;
1253
1254         # match <path>
1255         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1256                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1257                                        esc_path($from->{'file'}));
1258         }
1259         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1260                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1261                                  esc_path($to->{'file'}));
1262         }
1263         # match single <mode>
1264         if ($line =~ m/\s(\d{6})$/) {
1265                 $line .= '<span class="info"> (' .
1266                          file_type_long($1) .
1267                          ')</span>';
1268         }
1269         # match <hash>
1270         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1271                 # can match only for combined diff
1272                 $line = 'index ';
1273                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1274                         if ($from->{'href'}[$i]) {
1275                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1276                                                   -class=>"hash"},
1277                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1278                         } else {
1279                                 $line .= '0' x 7;
1280                         }
1281                         # separator
1282                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1283                 }
1284                 $line .= '..';
1285                 if ($to->{'href'}) {
1286                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1287                                          substr($diffinfo->{'to_id'},0,7));
1288                 } else {
1289                         $line .= '0' x 7;
1290                 }
1291
1292         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1293                 # can match only for ordinary diff
1294                 my ($from_link, $to_link);
1295                 if ($from->{'href'}) {
1296                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1297                                              substr($diffinfo->{'from_id'},0,7));
1298                 } else {
1299                         $from_link = '0' x 7;
1300                 }
1301                 if ($to->{'href'}) {
1302                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1303                                            substr($diffinfo->{'to_id'},0,7));
1304                 } else {
1305                         $to_link = '0' x 7;
1306                 }
1307                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1308                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1309         }
1310
1311         return $line . "<br/>\n";
1312 }
1313
1314 # format from-file/to-file diff header
1315 sub format_diff_from_to_header {
1316         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1317         my $line;
1318         my $result = '';
1319
1320         $line = $from_line;
1321         #assert($line =~ m/^---/) if DEBUG;
1322         # no extra formatting for "^--- /dev/null"
1323         if (! $diffinfo->{'nparents'}) {
1324                 # ordinary (single parent) diff
1325                 if ($line =~ m!^--- "?a/!) {
1326                         if ($from->{'href'}) {
1327                                 $line = '--- a/' .
1328                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1329                                                 esc_path($from->{'file'}));
1330                         } else {
1331                                 $line = '--- a/' .
1332                                         esc_path($from->{'file'});
1333                         }
1334                 }
1335                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1336
1337         } else {
1338                 # combined diff (merge commit)
1339                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1340                         if ($from->{'href'}[$i]) {
1341                                 $line = '--- ' .
1342                                         $cgi->a({-href=>href(action=>"blobdiff",
1343                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1344                                                              hash_parent_base=>$parents[$i],
1345                                                              file_parent=>$from->{'file'}[$i],
1346                                                              hash=>$diffinfo->{'to_id'},
1347                                                              hash_base=>$hash,
1348                                                              file_name=>$to->{'file'}),
1349                                                  -class=>"path",
1350                                                  -title=>"diff" . ($i+1)},
1351                                                 $i+1) .
1352                                         '/' .
1353                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1354                                                 esc_path($from->{'file'}[$i]));
1355                         } else {
1356                                 $line = '--- /dev/null';
1357                         }
1358                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1359                 }
1360         }
1361
1362         $line = $to_line;
1363         #assert($line =~ m/^\+\+\+/) if DEBUG;
1364         # no extra formatting for "^+++ /dev/null"
1365         if ($line =~ m!^\+\+\+ "?b/!) {
1366                 if ($to->{'href'}) {
1367                         $line = '+++ b/' .
1368                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1369                                         esc_path($to->{'file'}));
1370                 } else {
1371                         $line = '+++ b/' .
1372                                 esc_path($to->{'file'});
1373                 }
1374         }
1375         $result .= qq!<div class="diff to_file">$line</div>\n!;
1376
1377         return $result;
1378 }
1379
1380 # create note for patch simplified by combined diff
1381 sub format_diff_cc_simplified {
1382         my ($diffinfo, @parents) = @_;
1383         my $result = '';
1384
1385         $result .= "<div class=\"diff header\">" .
1386                    "diff --cc ";
1387         if (!is_deleted($diffinfo)) {
1388                 $result .= $cgi->a({-href => href(action=>"blob",
1389                                                   hash_base=>$hash,
1390                                                   hash=>$diffinfo->{'to_id'},
1391                                                   file_name=>$diffinfo->{'to_file'}),
1392                                     -class => "path"},
1393                                    esc_path($diffinfo->{'to_file'}));
1394         } else {
1395                 $result .= esc_path($diffinfo->{'to_file'});
1396         }
1397         $result .= "</div>\n" . # class="diff header"
1398                    "<div class=\"diff nodifferences\">" .
1399                    "Simple merge" .
1400                    "</div>\n"; # class="diff nodifferences"
1401
1402         return $result;
1403 }
1404
1405 # format patch (diff) line (not to be used for diff headers)
1406 sub format_diff_line {
1407         my $line = shift;
1408         my ($from, $to) = @_;
1409         my $diff_class = "";
1410
1411         chomp $line;
1412
1413         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1414                 # combined diff
1415                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1416                 if ($line =~ m/^\@{3}/) {
1417                         $diff_class = " chunk_header";
1418                 } elsif ($line =~ m/^\\/) {
1419                         $diff_class = " incomplete";
1420                 } elsif ($prefix =~ tr/+/+/) {
1421                         $diff_class = " add";
1422                 } elsif ($prefix =~ tr/-/-/) {
1423                         $diff_class = " rem";
1424                 }
1425         } else {
1426                 # assume ordinary diff
1427                 my $char = substr($line, 0, 1);
1428                 if ($char eq '+') {
1429                         $diff_class = " add";
1430                 } elsif ($char eq '-') {
1431                         $diff_class = " rem";
1432                 } elsif ($char eq '@') {
1433                         $diff_class = " chunk_header";
1434                 } elsif ($char eq "\\") {
1435                         $diff_class = " incomplete";
1436                 }
1437         }
1438         $line = untabify($line);
1439         if ($from && $to && $line =~ m/^\@{2} /) {
1440                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1441                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1442
1443                 $from_lines = 0 unless defined $from_lines;
1444                 $to_lines   = 0 unless defined $to_lines;
1445
1446                 if ($from->{'href'}) {
1447                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1448                                              -class=>"list"}, $from_text);
1449                 }
1450                 if ($to->{'href'}) {
1451                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1452                                              -class=>"list"}, $to_text);
1453                 }
1454                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1455                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1456                 return "<div class=\"diff$diff_class\">$line</div>\n";
1457         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1458                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1459                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1460
1461                 @from_text = split(' ', $ranges);
1462                 for (my $i = 0; $i < @from_text; ++$i) {
1463                         ($from_start[$i], $from_nlines[$i]) =
1464                                 (split(',', substr($from_text[$i], 1)), 0);
1465                 }
1466
1467                 $to_text   = pop @from_text;
1468                 $to_start  = pop @from_start;
1469                 $to_nlines = pop @from_nlines;
1470
1471                 $line = "<span class=\"chunk_info\">$prefix ";
1472                 for (my $i = 0; $i < @from_text; ++$i) {
1473                         if ($from->{'href'}[$i]) {
1474                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1475                                                   -class=>"list"}, $from_text[$i]);
1476                         } else {
1477                                 $line .= $from_text[$i];
1478                         }
1479                         $line .= " ";
1480                 }
1481                 if ($to->{'href'}) {
1482                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1483                                           -class=>"list"}, $to_text);
1484                 } else {
1485                         $line .= $to_text;
1486                 }
1487                 $line .= " $prefix</span>" .
1488                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1489                 return "<div class=\"diff$diff_class\">$line</div>\n";
1490         }
1491         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1492 }
1493
1494 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1495 # linked.  Pass the hash of the tree/commit to snapshot.
1496 sub format_snapshot_links {
1497         my ($hash) = @_;
1498         my @snapshot_fmts = gitweb_check_feature('snapshot');
1499         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1500         my $num_fmts = @snapshot_fmts;
1501         if ($num_fmts > 1) {
1502                 # A parenthesized list of links bearing format names.
1503                 # e.g. "snapshot (_tar.gz_ _zip_)"
1504                 return "snapshot (" . join(' ', map
1505                         $cgi->a({
1506                                 -href => href(
1507                                         action=>"snapshot",
1508                                         hash=>$hash,
1509                                         snapshot_format=>$_
1510                                 )
1511                         }, $known_snapshot_formats{$_}{'display'})
1512                 , @snapshot_fmts) . ")";
1513         } elsif ($num_fmts == 1) {
1514                 # A single "snapshot" link whose tooltip bears the format name.
1515                 # i.e. "_snapshot_"
1516                 my ($fmt) = @snapshot_fmts;
1517                 return
1518                         $cgi->a({
1519                                 -href => href(
1520                                         action=>"snapshot",
1521                                         hash=>$hash,
1522                                         snapshot_format=>$fmt
1523                                 ),
1524                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1525                         }, "snapshot");
1526         } else { # $num_fmts == 0
1527                 return undef;
1528         }
1529 }
1530
1531 ## ......................................................................
1532 ## functions returning values to be passed, perhaps after some
1533 ## transformation, to other functions; e.g. returning arguments to href()
1534
1535 # returns hash to be passed to href to generate gitweb URL
1536 # in -title key it returns description of link
1537 sub get_feed_info {
1538         my $format = shift || 'Atom';
1539         my %res = (action => lc($format));
1540
1541         # feed links are possible only for project views
1542         return unless (defined $project);
1543         # some views should link to OPML, or to generic project feed,
1544         # or don't have specific feed yet (so they should use generic)
1545         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1546
1547         my $branch;
1548         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1549         # from tag links; this also makes possible to detect branch links
1550         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1551             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1552                 $branch = $1;
1553         }
1554         # find log type for feed description (title)
1555         my $type = 'log';
1556         if (defined $file_name) {
1557                 $type  = "history of $file_name";
1558                 $type .= "/" if ($action eq 'tree');
1559                 $type .= " on '$branch'" if (defined $branch);
1560         } else {
1561                 $type = "log of $branch" if (defined $branch);
1562         }
1563
1564         $res{-title} = $type;
1565         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1566         $res{'file_name'} = $file_name;
1567
1568         return %res;
1569 }
1570
1571 ## ----------------------------------------------------------------------
1572 ## git utility subroutines, invoking git commands
1573
1574 # returns path to the core git executable and the --git-dir parameter as list
1575 sub git_cmd {
1576         return $GIT, '--git-dir='.$git_dir;
1577 }
1578
1579 # quote the given arguments for passing them to the shell
1580 # quote_command("command", "arg 1", "arg with ' and ! characters")
1581 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1582 # Try to avoid using this function wherever possible.
1583 sub quote_command {
1584         return join(' ',
1585                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1586 }
1587
1588 # get HEAD ref of given project as hash
1589 sub git_get_head_hash {
1590         my $project = shift;
1591         my $o_git_dir = $git_dir;
1592         my $retval = undef;
1593         $git_dir = "$projectroot/$project";
1594         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1595                 my $head = <$fd>;
1596                 close $fd;
1597                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1598                         $retval = $1;
1599                 }
1600         }
1601         if (defined $o_git_dir) {
1602                 $git_dir = $o_git_dir;
1603         }
1604         return $retval;
1605 }
1606
1607 # get type of given object
1608 sub git_get_type {
1609         my $hash = shift;
1610
1611         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1612         my $type = <$fd>;
1613         close $fd or return;
1614         chomp $type;
1615         return $type;
1616 }
1617
1618 # repository configuration
1619 our $config_file = '';
1620 our %config;
1621
1622 # store multiple values for single key as anonymous array reference
1623 # single values stored directly in the hash, not as [ <value> ]
1624 sub hash_set_multi {
1625         my ($hash, $key, $value) = @_;
1626
1627         if (!exists $hash->{$key}) {
1628                 $hash->{$key} = $value;
1629         } elsif (!ref $hash->{$key}) {
1630                 $hash->{$key} = [ $hash->{$key}, $value ];
1631         } else {
1632                 push @{$hash->{$key}}, $value;
1633         }
1634 }
1635
1636 # return hash of git project configuration
1637 # optionally limited to some section, e.g. 'gitweb'
1638 sub git_parse_project_config {
1639         my $section_regexp = shift;
1640         my %config;
1641
1642         local $/ = "\0";
1643
1644         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1645                 or return;
1646
1647         while (my $keyval = <$fh>) {
1648                 chomp $keyval;
1649                 my ($key, $value) = split(/\n/, $keyval, 2);
1650
1651                 hash_set_multi(\%config, $key, $value)
1652                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1653         }
1654         close $fh;
1655
1656         return %config;
1657 }
1658
1659 # convert config value to boolean, 'true' or 'false'
1660 # no value, number > 0, 'true' and 'yes' values are true
1661 # rest of values are treated as false (never as error)
1662 sub config_to_bool {
1663         my $val = shift;
1664
1665         # strip leading and trailing whitespace
1666         $val =~ s/^\s+//;
1667         $val =~ s/\s+$//;
1668
1669         return (!defined $val ||               # section.key
1670                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1671                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1672 }
1673
1674 # convert config value to simple decimal number
1675 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1676 # to be multiplied by 1024, 1048576, or 1073741824
1677 sub config_to_int {
1678         my $val = shift;
1679
1680         # strip leading and trailing whitespace
1681         $val =~ s/^\s+//;
1682         $val =~ s/\s+$//;
1683
1684         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1685                 $unit = lc($unit);
1686                 # unknown unit is treated as 1
1687                 return $num * ($unit eq 'g' ? 1073741824 :
1688                                $unit eq 'm' ?    1048576 :
1689                                $unit eq 'k' ?       1024 : 1);
1690         }
1691         return $val;
1692 }
1693
1694 # convert config value to array reference, if needed
1695 sub config_to_multi {
1696         my $val = shift;
1697
1698         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1699 }
1700
1701 sub git_get_project_config {
1702         my ($key, $type) = @_;
1703
1704         # key sanity check
1705         return unless ($key);
1706         $key =~ s/^gitweb\.//;
1707         return if ($key =~ m/\W/);
1708
1709         # type sanity check
1710         if (defined $type) {
1711                 $type =~ s/^--//;
1712                 $type = undef
1713                         unless ($type eq 'bool' || $type eq 'int');
1714         }
1715
1716         # get config
1717         if (!defined $config_file ||
1718             $config_file ne "$git_dir/config") {
1719                 %config = git_parse_project_config('gitweb');
1720                 $config_file = "$git_dir/config";
1721         }
1722
1723         # ensure given type
1724         if (!defined $type) {
1725                 return $config{"gitweb.$key"};
1726         } elsif ($type eq 'bool') {
1727                 # backward compatibility: 'git config --bool' returns true/false
1728                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1729         } elsif ($type eq 'int') {
1730                 return config_to_int($config{"gitweb.$key"});
1731         }
1732         return $config{"gitweb.$key"};
1733 }
1734
1735 # get hash of given path at given ref
1736 sub git_get_hash_by_path {
1737         my $base = shift;
1738         my $path = shift || return undef;
1739         my $type = shift;
1740
1741         $path =~ s,/+$,,;
1742
1743         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1744                 or die_error(500, "Open git-ls-tree failed");
1745         my $line = <$fd>;
1746         close $fd or return undef;
1747
1748         if (!defined $line) {
1749                 # there is no tree or hash given by $path at $base
1750                 return undef;
1751         }
1752
1753         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1754         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1755         if (defined $type && $type ne $2) {
1756                 # type doesn't match
1757                 return undef;
1758         }
1759         return $3;
1760 }
1761
1762 # get path of entry with given hash at given tree-ish (ref)
1763 # used to get 'from' filename for combined diff (merge commit) for renames
1764 sub git_get_path_by_hash {
1765         my $base = shift || return;
1766         my $hash = shift || return;
1767
1768         local $/ = "\0";
1769
1770         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1771                 or return undef;
1772         while (my $line = <$fd>) {
1773                 chomp $line;
1774
1775                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1776                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1777                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1778                         close $fd;
1779                         return $1;
1780                 }
1781         }
1782         close $fd;
1783         return undef;
1784 }
1785
1786 ## ......................................................................
1787 ## git utility functions, directly accessing git repository
1788
1789 sub git_get_project_description {
1790         my $path = shift;
1791
1792         $git_dir = "$projectroot/$path";
1793         open my $fd, "$git_dir/description"
1794                 or return git_get_project_config('description');
1795         my $descr = <$fd>;
1796         close $fd;
1797         if (defined $descr) {
1798                 chomp $descr;
1799         }
1800         return $descr;
1801 }
1802
1803 sub git_get_project_ctags {
1804         my $path = shift;
1805         my $ctags = {};
1806
1807         $git_dir = "$projectroot/$path";
1808         foreach (<$git_dir/ctags/*>) {
1809                 open CT, $_ or next;
1810                 my $val = <CT>;
1811                 chomp $val;
1812                 close CT;
1813                 my $ctag = $_; $ctag =~ s#.*/##;
1814                 $ctags->{$ctag} = $val;
1815         }
1816         $ctags;
1817 }
1818
1819 sub git_populate_project_tagcloud {
1820         my $ctags = shift;
1821
1822         # First, merge different-cased tags; tags vote on casing
1823         my %ctags_lc;
1824         foreach (keys %$ctags) {
1825                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1826                 if (not $ctags_lc{lc $_}->{topcount}
1827                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1828                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1829                         $ctags_lc{lc $_}->{topname} = $_;
1830                 }
1831         }
1832
1833         my $cloud;
1834         if (eval { require HTML::TagCloud; 1; }) {
1835                 $cloud = HTML::TagCloud->new;
1836                 foreach (sort keys %ctags_lc) {
1837                         # Pad the title with spaces so that the cloud looks
1838                         # less crammed.
1839                         my $title = $ctags_lc{$_}->{topname};
1840                         $title =~ s/ /&nbsp;/g;
1841                         $title =~ s/^/&nbsp;/g;
1842                         $title =~ s/$/&nbsp;/g;
1843                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1844                 }
1845         } else {
1846                 $cloud = \%ctags_lc;
1847         }
1848         $cloud;
1849 }
1850
1851 sub git_show_project_tagcloud {
1852         my ($cloud, $count) = @_;
1853         print STDERR ref($cloud)."..\n";
1854         if (ref $cloud eq 'HTML::TagCloud') {
1855                 return $cloud->html_and_css($count);
1856         } else {
1857                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
1858                 return '<p align="center">' . join (', ', map {
1859                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
1860                 } splice(@tags, 0, $count)) . '</p>';
1861         }
1862 }
1863
1864 sub git_get_project_url_list {
1865         my $path = shift;
1866
1867         $git_dir = "$projectroot/$path";
1868         open my $fd, "$git_dir/cloneurl"
1869                 or return wantarray ?
1870                 @{ config_to_multi(git_get_project_config('url')) } :
1871                    config_to_multi(git_get_project_config('url'));
1872         my @git_project_url_list = map { chomp; $_ } <$fd>;
1873         close $fd;
1874
1875         return wantarray ? @git_project_url_list : \@git_project_url_list;
1876 }
1877
1878 sub git_get_projects_list {
1879         my ($filter) = @_;
1880         my @list;
1881
1882         $filter ||= '';
1883         $filter =~ s/\.git$//;
1884
1885         my ($check_forks) = gitweb_check_feature('forks');
1886
1887         if (-d $projects_list) {
1888                 # search in directory
1889                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1890                 # remove the trailing "/"
1891                 $dir =~ s!/+$!!;
1892                 my $pfxlen = length("$dir");
1893                 my $pfxdepth = ($dir =~ tr!/!!);
1894
1895                 File::Find::find({
1896                         follow_fast => 1, # follow symbolic links
1897                         follow_skip => 2, # ignore duplicates
1898                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1899                         wanted => sub {
1900                                 # skip project-list toplevel, if we get it.
1901                                 return if (m!^[/.]$!);
1902                                 # only directories can be git repositories
1903                                 return unless (-d $_);
1904                                 # don't traverse too deep (Find is super slow on os x)
1905                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1906                                         $File::Find::prune = 1;
1907                                         return;
1908                                 }
1909
1910                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1911                                 # we check related file in $projectroot
1912                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
1913                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1914                                         $File::Find::prune = 1;
1915                                 }
1916                         },
1917                 }, "$dir");
1918
1919         } elsif (-f $projects_list) {
1920                 # read from file(url-encoded):
1921                 # 'git%2Fgit.git Linus+Torvalds'
1922                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1923                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1924                 my %paths;
1925                 open my ($fd), $projects_list or return;
1926         PROJECT:
1927                 while (my $line = <$fd>) {
1928                         chomp $line;
1929                         my ($path, $owner) = split ' ', $line;
1930                         $path = unescape($path);
1931                         $owner = unescape($owner);
1932                         if (!defined $path) {
1933                                 next;
1934                         }
1935                         if ($filter ne '') {
1936                                 # looking for forks;
1937                                 my $pfx = substr($path, 0, length($filter));
1938                                 if ($pfx ne $filter) {
1939                                         next PROJECT;
1940                                 }
1941                                 my $sfx = substr($path, length($filter));
1942                                 if ($sfx !~ /^\/.*\.git$/) {
1943                                         next PROJECT;
1944                                 }
1945                         } elsif ($check_forks) {
1946                         PATH:
1947                                 foreach my $filter (keys %paths) {
1948                                         # looking for forks;
1949                                         my $pfx = substr($path, 0, length($filter));
1950                                         if ($pfx ne $filter) {
1951                                                 next PATH;
1952                                         }
1953                                         my $sfx = substr($path, length($filter));
1954                                         if ($sfx !~ /^\/.*\.git$/) {
1955                                                 next PATH;
1956                                         }
1957                                         # is a fork, don't include it in
1958                                         # the list
1959                                         next PROJECT;
1960                                 }
1961                         }
1962                         if (check_export_ok("$projectroot/$path")) {
1963                                 my $pr = {
1964                                         path => $path,
1965                                         owner => to_utf8($owner),
1966                                 };
1967                                 push @list, $pr;
1968                                 (my $forks_path = $path) =~ s/\.git$//;
1969                                 $paths{$forks_path}++;
1970                         }
1971                 }
1972                 close $fd;
1973         }
1974         return @list;
1975 }
1976
1977 our $gitweb_project_owner = undef;
1978 sub git_get_project_list_from_file {
1979
1980         return if (defined $gitweb_project_owner);
1981
1982         $gitweb_project_owner = {};
1983         # read from file (url-encoded):
1984         # 'git%2Fgit.git Linus+Torvalds'
1985         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1986         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1987         if (-f $projects_list) {
1988                 open (my $fd , $projects_list);
1989                 while (my $line = <$fd>) {
1990                         chomp $line;
1991                         my ($pr, $ow) = split ' ', $line;
1992                         $pr = unescape($pr);
1993                         $ow = unescape($ow);
1994                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1995                 }
1996                 close $fd;
1997         }
1998 }
1999
2000 sub git_get_project_owner {
2001         my $project = shift;
2002         my $owner;
2003
2004         return undef unless $project;
2005         $git_dir = "$projectroot/$project";
2006
2007         if (!defined $gitweb_project_owner) {
2008                 git_get_project_list_from_file();
2009         }
2010
2011         if (exists $gitweb_project_owner->{$project}) {
2012                 $owner = $gitweb_project_owner->{$project};
2013         }
2014         if (!defined $owner){
2015                 $owner = git_get_project_config('owner');
2016         }
2017         if (!defined $owner) {
2018                 $owner = get_file_owner("$git_dir");
2019         }
2020
2021         return $owner;
2022 }
2023
2024 sub git_get_last_activity {
2025         my ($path) = @_;
2026         my $fd;
2027
2028         $git_dir = "$projectroot/$path";
2029         open($fd, "-|", git_cmd(), 'for-each-ref',
2030              '--format=%(committer)',
2031              '--sort=-committerdate',
2032              '--count=1',
2033              'refs/heads') or return;
2034         my $most_recent = <$fd>;
2035         close $fd or return;
2036         if (defined $most_recent &&
2037             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2038                 my $timestamp = $1;
2039                 my $age = time - $timestamp;
2040                 return ($age, age_string($age));
2041         }
2042         return (undef, undef);
2043 }
2044
2045 sub git_get_references {
2046         my $type = shift || "";
2047         my %refs;
2048         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2049         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2050         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2051                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2052                 or return;
2053
2054         while (my $line = <$fd>) {
2055                 chomp $line;
2056                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2057                         if (defined $refs{$1}) {
2058                                 push @{$refs{$1}}, $2;
2059                         } else {
2060                                 $refs{$1} = [ $2 ];
2061                         }
2062                 }
2063         }
2064         close $fd or return;
2065         return \%refs;
2066 }
2067
2068 sub git_get_rev_name_tags {
2069         my $hash = shift || return undef;
2070
2071         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2072                 or return;
2073         my $name_rev = <$fd>;
2074         close $fd;
2075
2076         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2077                 return $1;
2078         } else {
2079                 # catches also '$hash undefined' output
2080                 return undef;
2081         }
2082 }
2083
2084 ## ----------------------------------------------------------------------
2085 ## parse to hash functions
2086
2087 sub parse_date {
2088         my $epoch = shift;
2089         my $tz = shift || "-0000";
2090
2091         my %date;
2092         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2093         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2094         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2095         $date{'hour'} = $hour;
2096         $date{'minute'} = $min;
2097         $date{'mday'} = $mday;
2098         $date{'day'} = $days[$wday];
2099         $date{'month'} = $months[$mon];
2100         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2101                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2102         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2103                              $mday, $months[$mon], $hour ,$min;
2104         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2105                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2106
2107         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2108         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2109         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2110         $date{'hour_local'} = $hour;
2111         $date{'minute_local'} = $min;
2112         $date{'tz_local'} = $tz;
2113         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2114                                   1900+$year, $mon+1, $mday,
2115                                   $hour, $min, $sec, $tz);
2116         return %date;
2117 }
2118
2119 sub parse_tag {
2120         my $tag_id = shift;
2121         my %tag;
2122         my @comment;
2123
2124         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2125         $tag{'id'} = $tag_id;
2126         while (my $line = <$fd>) {
2127                 chomp $line;
2128                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2129                         $tag{'object'} = $1;
2130                 } elsif ($line =~ m/^type (.+)$/) {
2131                         $tag{'type'} = $1;
2132                 } elsif ($line =~ m/^tag (.+)$/) {
2133                         $tag{'name'} = $1;
2134                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2135                         $tag{'author'} = $1;
2136                         $tag{'epoch'} = $2;
2137                         $tag{'tz'} = $3;
2138                 } elsif ($line =~ m/--BEGIN/) {
2139                         push @comment, $line;
2140                         last;
2141                 } elsif ($line eq "") {
2142                         last;
2143                 }
2144         }
2145         push @comment, <$fd>;
2146         $tag{'comment'} = \@comment;
2147         close $fd or return;
2148         if (!defined $tag{'name'}) {
2149                 return
2150         };
2151         return %tag
2152 }
2153
2154 sub parse_commit_text {
2155         my ($commit_text, $withparents) = @_;
2156         my @commit_lines = split '\n', $commit_text;
2157         my %co;
2158
2159         pop @commit_lines; # Remove '\0'
2160
2161         if (! @commit_lines) {
2162                 return;
2163         }
2164
2165         my $header = shift @commit_lines;
2166         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2167                 return;
2168         }
2169         ($co{'id'}, my @parents) = split ' ', $header;
2170         while (my $line = shift @commit_lines) {
2171                 last if $line eq "\n";
2172                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2173                         $co{'tree'} = $1;
2174                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2175                         push @parents, $1;
2176                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2177                         $co{'author'} = $1;
2178                         $co{'author_epoch'} = $2;
2179                         $co{'author_tz'} = $3;
2180                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2181                                 $co{'author_name'}  = $1;
2182                                 $co{'author_email'} = $2;
2183                         } else {
2184                                 $co{'author_name'} = $co{'author'};
2185                         }
2186                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2187                         $co{'committer'} = $1;
2188                         $co{'committer_epoch'} = $2;
2189                         $co{'committer_tz'} = $3;
2190                         $co{'committer_name'} = $co{'committer'};
2191                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2192                                 $co{'committer_name'}  = $1;
2193                                 $co{'committer_email'} = $2;
2194                         } else {
2195                                 $co{'committer_name'} = $co{'committer'};
2196                         }
2197                 }
2198         }
2199         if (!defined $co{'tree'}) {
2200                 return;
2201         };
2202         $co{'parents'} = \@parents;
2203         $co{'parent'} = $parents[0];
2204
2205         foreach my $title (@commit_lines) {
2206                 $title =~ s/^    //;
2207                 if ($title ne "") {
2208                         $co{'title'} = chop_str($title, 80, 5);
2209                         # remove leading stuff of merges to make the interesting part visible
2210                         if (length($title) > 50) {
2211                                 $title =~ s/^Automatic //;
2212                                 $title =~ s/^merge (of|with) /Merge ... /i;
2213                                 if (length($title) > 50) {
2214                                         $title =~ s/(http|rsync):\/\///;
2215                                 }
2216                                 if (length($title) > 50) {
2217                                         $title =~ s/(master|www|rsync)\.//;
2218                                 }
2219                                 if (length($title) > 50) {
2220                                         $title =~ s/kernel.org:?//;
2221                                 }
2222                                 if (length($title) > 50) {
2223                                         $title =~ s/\/pub\/scm//;
2224                                 }
2225                         }
2226                         $co{'title_short'} = chop_str($title, 50, 5);
2227                         last;
2228                 }
2229         }
2230         if (! defined $co{'title'} || $co{'title'} eq "") {
2231                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2232         }
2233         # remove added spaces
2234         foreach my $line (@commit_lines) {
2235                 $line =~ s/^    //;
2236         }
2237         $co{'comment'} = \@commit_lines;
2238
2239         my $age = time - $co{'committer_epoch'};
2240         $co{'age'} = $age;
2241         $co{'age_string'} = age_string($age);
2242         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2243         if ($age > 60*60*24*7*2) {
2244                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2245                 $co{'age_string_age'} = $co{'age_string'};
2246         } else {
2247                 $co{'age_string_date'} = $co{'age_string'};
2248                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2249         }
2250         return %co;
2251 }
2252
2253 sub parse_commit {
2254         my ($commit_id) = @_;
2255         my %co;
2256
2257         local $/ = "\0";
2258
2259         open my $fd, "-|", git_cmd(), "rev-list",
2260                 "--parents",
2261                 "--header",
2262                 "--max-count=1",
2263                 $commit_id,
2264                 "--",
2265                 or die_error(500, "Open git-rev-list failed");
2266         %co = parse_commit_text(<$fd>, 1);
2267         close $fd;
2268
2269         return %co;
2270 }
2271
2272 sub parse_commits {
2273         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2274         my @cos;
2275
2276         $maxcount ||= 1;
2277         $skip ||= 0;
2278
2279         local $/ = "\0";
2280
2281         open my $fd, "-|", git_cmd(), "rev-list",
2282                 "--header",
2283                 @args,
2284                 ("--max-count=" . $maxcount),
2285                 ("--skip=" . $skip),
2286                 @extra_options,
2287                 $commit_id,
2288                 "--",
2289                 ($filename ? ($filename) : ())
2290                 or die_error(500, "Open git-rev-list failed");
2291         while (my $line = <$fd>) {
2292                 my %co = parse_commit_text($line);
2293                 push @cos, \%co;
2294         }
2295         close $fd;
2296
2297         return wantarray ? @cos : \@cos;
2298 }
2299
2300 # parse line of git-diff-tree "raw" output
2301 sub parse_difftree_raw_line {
2302         my $line = shift;
2303         my %res;
2304
2305         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2306         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2307         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2308                 $res{'from_mode'} = $1;
2309                 $res{'to_mode'} = $2;
2310                 $res{'from_id'} = $3;
2311                 $res{'to_id'} = $4;
2312                 $res{'status'} = $5;
2313                 $res{'similarity'} = $6;
2314                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2315                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2316                 } else {
2317                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2318                 }
2319         }
2320         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2321         # combined diff (for merge commit)
2322         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2323                 $res{'nparents'}  = length($1);
2324                 $res{'from_mode'} = [ split(' ', $2) ];
2325                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2326                 $res{'from_id'} = [ split(' ', $3) ];
2327                 $res{'to_id'} = pop @{$res{'from_id'}};
2328                 $res{'status'} = [ split('', $4) ];
2329                 $res{'to_file'} = unquote($5);
2330         }
2331         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2332         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2333                 $res{'commit'} = $1;
2334         }
2335
2336         return wantarray ? %res : \%res;
2337 }
2338
2339 # wrapper: return parsed line of git-diff-tree "raw" output
2340 # (the argument might be raw line, or parsed info)
2341 sub parsed_difftree_line {
2342         my $line_or_ref = shift;
2343
2344         if (ref($line_or_ref) eq "HASH") {
2345                 # pre-parsed (or generated by hand)
2346                 return $line_or_ref;
2347         } else {
2348                 return parse_difftree_raw_line($line_or_ref);
2349         }
2350 }
2351
2352 # parse line of git-ls-tree output
2353 sub parse_ls_tree_line ($;%) {
2354         my $line = shift;
2355         my %opts = @_;
2356         my %res;
2357
2358         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2359         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2360
2361         $res{'mode'} = $1;
2362         $res{'type'} = $2;
2363         $res{'hash'} = $3;
2364         if ($opts{'-z'}) {
2365                 $res{'name'} = $4;
2366         } else {
2367                 $res{'name'} = unquote($4);
2368         }
2369
2370         return wantarray ? %res : \%res;
2371 }
2372
2373 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2374 sub parse_from_to_diffinfo {
2375         my ($diffinfo, $from, $to, @parents) = @_;
2376
2377         if ($diffinfo->{'nparents'}) {
2378                 # combined diff
2379                 $from->{'file'} = [];
2380                 $from->{'href'} = [];
2381                 fill_from_file_info($diffinfo, @parents)
2382                         unless exists $diffinfo->{'from_file'};
2383                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2384                         $from->{'file'}[$i] =
2385                                 defined $diffinfo->{'from_file'}[$i] ?
2386                                         $diffinfo->{'from_file'}[$i] :
2387                                         $diffinfo->{'to_file'};
2388                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2389                                 $from->{'href'}[$i] = href(action=>"blob",
2390                                                            hash_base=>$parents[$i],
2391                                                            hash=>$diffinfo->{'from_id'}[$i],
2392                                                            file_name=>$from->{'file'}[$i]);
2393                         } else {
2394                                 $from->{'href'}[$i] = undef;
2395                         }
2396                 }
2397         } else {
2398                 # ordinary (not combined) diff
2399                 $from->{'file'} = $diffinfo->{'from_file'};
2400                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2401                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2402                                                hash=>$diffinfo->{'from_id'},
2403                                                file_name=>$from->{'file'});
2404                 } else {
2405                         delete $from->{'href'};
2406                 }
2407         }
2408
2409         $to->{'file'} = $diffinfo->{'to_file'};
2410         if (!is_deleted($diffinfo)) { # file exists in result
2411                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2412                                      hash=>$diffinfo->{'to_id'},
2413                                      file_name=>$to->{'file'});
2414         } else {
2415                 delete $to->{'href'};
2416         }
2417 }
2418
2419 ## ......................................................................
2420 ## parse to array of hashes functions
2421
2422 sub git_get_heads_list {
2423         my $limit = shift;
2424         my @headslist;
2425
2426         open my $fd, '-|', git_cmd(), 'for-each-ref',
2427                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2428                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2429                 'refs/heads'
2430                 or return;
2431         while (my $line = <$fd>) {
2432                 my %ref_item;
2433
2434                 chomp $line;
2435                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2436                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2437                 my ($committer, $epoch, $tz) =
2438                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2439                 $ref_item{'fullname'}  = $name;
2440                 $name =~ s!^refs/heads/!!;
2441
2442                 $ref_item{'name'}  = $name;
2443                 $ref_item{'id'}    = $hash;
2444                 $ref_item{'title'} = $title || '(no commit message)';
2445                 $ref_item{'epoch'} = $epoch;
2446                 if ($epoch) {
2447                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2448                 } else {
2449                         $ref_item{'age'} = "unknown";
2450                 }
2451
2452                 push @headslist, \%ref_item;
2453         }
2454         close $fd;
2455
2456         return wantarray ? @headslist : \@headslist;
2457 }
2458
2459 sub git_get_tags_list {
2460         my $limit = shift;
2461         my @tagslist;
2462
2463         open my $fd, '-|', git_cmd(), 'for-each-ref',
2464                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2465                 '--format=%(objectname) %(objecttype) %(refname) '.
2466                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2467                 'refs/tags'
2468                 or return;
2469         while (my $line = <$fd>) {
2470                 my %ref_item;
2471
2472                 chomp $line;
2473                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2474                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2475                 my ($creator, $epoch, $tz) =
2476                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2477                 $ref_item{'fullname'} = $name;
2478                 $name =~ s!^refs/tags/!!;
2479
2480                 $ref_item{'type'} = $type;
2481                 $ref_item{'id'} = $id;
2482                 $ref_item{'name'} = $name;
2483                 if ($type eq "tag") {
2484                         $ref_item{'subject'} = $title;
2485                         $ref_item{'reftype'} = $reftype;
2486                         $ref_item{'refid'}   = $refid;
2487                 } else {
2488                         $ref_item{'reftype'} = $type;
2489                         $ref_item{'refid'}   = $id;
2490                 }
2491
2492                 if ($type eq "tag" || $type eq "commit") {
2493                         $ref_item{'epoch'} = $epoch;
2494                         if ($epoch) {
2495                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2496                         } else {
2497                                 $ref_item{'age'} = "unknown";
2498                         }
2499                 }
2500
2501                 push @tagslist, \%ref_item;
2502         }
2503         close $fd;
2504
2505         return wantarray ? @tagslist : \@tagslist;
2506 }
2507
2508 ## ----------------------------------------------------------------------
2509 ## filesystem-related functions
2510
2511 sub get_file_owner {
2512         my $path = shift;
2513
2514         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2515         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2516         if (!defined $gcos) {
2517                 return undef;
2518         }
2519         my $owner = $gcos;
2520         $owner =~ s/[,;].*$//;
2521         return to_utf8($owner);
2522 }
2523
2524 ## ......................................................................
2525 ## mimetype related functions
2526
2527 sub mimetype_guess_file {
2528         my $filename = shift;
2529         my $mimemap = shift;
2530         -r $mimemap or return undef;
2531
2532         my %mimemap;
2533         open(MIME, $mimemap) or return undef;
2534         while (<MIME>) {
2535                 next if m/^#/; # skip comments
2536                 my ($mime, $exts) = split(/\t+/);
2537                 if (defined $exts) {
2538                         my @exts = split(/\s+/, $exts);
2539                         foreach my $ext (@exts) {
2540                                 $mimemap{$ext} = $mime;
2541                         }
2542                 }
2543         }
2544         close(MIME);
2545
2546         $filename =~ /\.([^.]*)$/;
2547         return $mimemap{$1};
2548 }
2549
2550 sub mimetype_guess {
2551         my $filename = shift;
2552         my $mime;
2553         $filename =~ /\./ or return undef;
2554
2555         if ($mimetypes_file) {
2556                 my $file = $mimetypes_file;
2557                 if ($file !~ m!^/!) { # if it is relative path
2558                         # it is relative to project
2559                         $file = "$projectroot/$project/$file";
2560                 }
2561                 $mime = mimetype_guess_file($filename, $file);
2562         }
2563         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2564         return $mime;
2565 }
2566
2567 sub blob_mimetype {
2568         my $fd = shift;
2569         my $filename = shift;
2570
2571         if ($filename) {
2572                 my $mime = mimetype_guess($filename);
2573                 $mime and return $mime;
2574         }
2575
2576         # just in case
2577         return $default_blob_plain_mimetype unless $fd;
2578
2579         if (-T $fd) {
2580                 return 'text/plain';
2581         } elsif (! $filename) {
2582                 return 'application/octet-stream';
2583         } elsif ($filename =~ m/\.png$/i) {
2584                 return 'image/png';
2585         } elsif ($filename =~ m/\.gif$/i) {
2586                 return 'image/gif';
2587         } elsif ($filename =~ m/\.jpe?g$/i) {
2588                 return 'image/jpeg';
2589         } else {
2590                 return 'application/octet-stream';
2591         }
2592 }
2593
2594 sub blob_contenttype {
2595         my ($fd, $file_name, $type) = @_;
2596
2597         $type ||= blob_mimetype($fd, $file_name);
2598         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2599                 $type .= "; charset=$default_text_plain_charset";
2600         }
2601
2602         return $type;
2603 }
2604
2605 ## ======================================================================
2606 ## functions printing HTML: header, footer, error page
2607
2608 sub git_header_html {
2609         my $status = shift || "200 OK";
2610         my $expires = shift;
2611
2612         my $title = "$site_name";
2613         if (defined $project) {
2614                 $title .= " - " . to_utf8($project);
2615                 if (defined $action) {
2616                         $title .= "/$action";
2617                         if (defined $file_name) {
2618                                 $title .= " - " . esc_path($file_name);
2619                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2620                                         $title .= "/";
2621                                 }
2622                         }
2623                 }
2624         }
2625         my $content_type;
2626         # require explicit support from the UA if we are to send the page as
2627         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2628         # we have to do this because MSIE sometimes globs '*/*', pretending to
2629         # support xhtml+xml but choking when it gets what it asked for.
2630         if (defined $cgi->http('HTTP_ACCEPT') &&
2631             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2632             $cgi->Accept('application/xhtml+xml') != 0) {
2633                 $content_type = 'application/xhtml+xml';
2634         } else {
2635                 $content_type = 'text/html';
2636         }
2637         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2638                            -status=> $status, -expires => $expires);
2639         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2640         print <<EOF;
2641 <?xml version="1.0" encoding="utf-8"?>
2642 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2643 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2644 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2645 <!-- git core binaries version $git_version -->
2646 <head>
2647 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2648 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2649 <meta name="robots" content="index, nofollow"/>
2650 <title>$title</title>
2651 EOF
2652 # print out each stylesheet that exist
2653         if (defined $stylesheet) {
2654 #provides backwards capability for those people who define style sheet in a config file
2655                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2656         } else {
2657                 foreach my $stylesheet (@stylesheets) {
2658                         next unless $stylesheet;
2659                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2660                 }
2661         }
2662         if (defined $project) {
2663                 my %href_params = get_feed_info();
2664                 if (!exists $href_params{'-title'}) {
2665                         $href_params{'-title'} = 'log';
2666                 }
2667
2668                 foreach my $format qw(RSS Atom) {
2669                         my $type = lc($format);
2670                         my %link_attr = (
2671                                 '-rel' => 'alternate',
2672                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2673                                 '-type' => "application/$type+xml"
2674                         );
2675
2676                         $href_params{'action'} = $type;
2677                         $link_attr{'-href'} = href(%href_params);
2678                         print "<link ".
2679                               "rel=\"$link_attr{'-rel'}\" ".
2680                               "title=\"$link_attr{'-title'}\" ".
2681                               "href=\"$link_attr{'-href'}\" ".
2682                               "type=\"$link_attr{'-type'}\" ".
2683                               "/>\n";
2684
2685                         $href_params{'extra_options'} = '--no-merges';
2686                         $link_attr{'-href'} = href(%href_params);
2687                         $link_attr{'-title'} .= ' (no merges)';
2688                         print "<link ".
2689                               "rel=\"$link_attr{'-rel'}\" ".
2690                               "title=\"$link_attr{'-title'}\" ".
2691                               "href=\"$link_attr{'-href'}\" ".
2692                               "type=\"$link_attr{'-type'}\" ".
2693                               "/>\n";
2694                 }
2695
2696         } else {
2697                 printf('<link rel="alternate" title="%s projects list" '.
2698                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2699                        $site_name, href(project=>undef, action=>"project_index"));
2700                 printf('<link rel="alternate" title="%s projects feeds" '.
2701                        'href="%s" type="text/x-opml" />'."\n",
2702                        $site_name, href(project=>undef, action=>"opml"));
2703         }
2704         if (defined $favicon) {
2705                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2706         }
2707
2708         print "</head>\n" .
2709               "<body>\n";
2710
2711         if (-f $site_header) {
2712                 open (my $fd, $site_header);
2713                 print <$fd>;
2714                 close $fd;
2715         }
2716
2717         print "<div class=\"page_header\">\n" .
2718               $cgi->a({-href => esc_url($logo_url),
2719                        -title => $logo_label},
2720                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2721         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2722         if (defined $project) {
2723                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2724                 if (defined $action) {
2725                         print " / $action";
2726                 }
2727                 print "\n";
2728         }
2729         print "</div>\n";
2730
2731         my ($have_search) = gitweb_check_feature('search');
2732         if (defined $project && $have_search) {
2733                 if (!defined $searchtext) {
2734                         $searchtext = "";
2735                 }
2736                 my $search_hash;
2737                 if (defined $hash_base) {
2738                         $search_hash = $hash_base;
2739                 } elsif (defined $hash) {
2740                         $search_hash = $hash;
2741                 } else {
2742                         $search_hash = "HEAD";
2743                 }
2744                 my $action = $my_uri;
2745                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2746                 if ($use_pathinfo) {
2747                         $action .= "/".esc_url($project);
2748                 }
2749                 print $cgi->startform(-method => "get", -action => $action) .
2750                       "<div class=\"search\">\n" .
2751                       (!$use_pathinfo &&
2752                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2753                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2754                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2755                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2756                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2757                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2758                       " search:\n",
2759                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2760                       "<span title=\"Extended regular expression\">" .
2761                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2762                                      -checked => $search_use_regexp) .
2763                       "</span>" .
2764                       "</div>" .
2765                       $cgi->end_form() . "\n";
2766         }
2767 }
2768
2769 sub git_footer_html {
2770         my $feed_class = 'rss_logo';
2771
2772         print "<div class=\"page_footer\">\n";
2773         if (defined $project) {
2774                 my $descr = git_get_project_description($project);
2775                 if (defined $descr) {
2776                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2777                 }
2778
2779                 my %href_params = get_feed_info();
2780                 if (!%href_params) {
2781                         $feed_class .= ' generic';
2782                 }
2783                 $href_params{'-title'} ||= 'log';
2784
2785                 foreach my $format qw(RSS Atom) {
2786                         $href_params{'action'} = lc($format);
2787                         print $cgi->a({-href => href(%href_params),
2788                                       -title => "$href_params{'-title'} $format feed",
2789                                       -class => $feed_class}, $format)."\n";
2790                 }
2791
2792         } else {
2793                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2794                               -class => $feed_class}, "OPML") . " ";
2795                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2796                               -class => $feed_class}, "TXT") . "\n";
2797         }
2798         print "</div>\n"; # class="page_footer"
2799
2800         if (-f $site_footer) {
2801                 open (my $fd, $site_footer);
2802                 print <$fd>;
2803                 close $fd;
2804         }
2805
2806         print "</body>\n" .
2807               "</html>";
2808 }
2809
2810 # die_error(<http_status_code>, <error_message>)
2811 # Example: die_error(404, 'Hash not found')
2812 # By convention, use the following status codes (as defined in RFC 2616):
2813 # 400: Invalid or missing CGI parameters, or
2814 #      requested object exists but has wrong type.
2815 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2816 #      this server or project.
2817 # 404: Requested object/revision/project doesn't exist.
2818 # 500: The server isn't configured properly, or
2819 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2820 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2821 sub die_error {
2822         my $status = shift || 500;
2823         my $error = shift || "Internal server error";
2824
2825         my %http_responses = (400 => '400 Bad Request',
2826                               403 => '403 Forbidden',
2827                               404 => '404 Not Found',
2828                               500 => '500 Internal Server Error');
2829         git_header_html($http_responses{$status});
2830         print <<EOF;
2831 <div class="page_body">
2832 <br /><br />
2833 $status - $error
2834 <br />
2835 </div>
2836 EOF
2837         git_footer_html();
2838         exit;
2839 }
2840
2841 ## ----------------------------------------------------------------------
2842 ## functions printing or outputting HTML: navigation
2843
2844 sub git_print_page_nav {
2845         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2846         $extra = '' if !defined $extra; # pager or formats
2847
2848         my @navs = qw(summary shortlog log commit commitdiff tree);
2849         if ($suppress) {
2850                 @navs = grep { $_ ne $suppress } @navs;
2851         }
2852
2853         my %arg = map { $_ => {action=>$_} } @navs;
2854         if (defined $head) {
2855                 for (qw(commit commitdiff)) {
2856                         $arg{$_}{'hash'} = $head;
2857                 }
2858                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2859                         for (qw(shortlog log)) {
2860                                 $arg{$_}{'hash'} = $head;
2861                         }
2862                 }
2863         }
2864
2865         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2866         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2867
2868         my @actions = gitweb_check_feature('actions');
2869         my %repl = (
2870                 '%' => '%',
2871                 'n' => $project,         # project name
2872                 'f' => $git_dir,         # project path within filesystem
2873                 'h' => $treehead || '',  # current hash ('h' parameter)
2874                 'b' => $treebase || '',  # hash base ('hb' parameter)
2875         );
2876         while (@actions) {
2877                 my ($label, $link, $pos) = splice(@actions,0,3);
2878                 # insert
2879                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
2880                 # munch munch
2881                 $link =~ s/%([%nfhb])/$repl{$1}/g;
2882                 $arg{$label}{'_href'} = $link;
2883         }
2884
2885         print "<div class=\"page_nav\">\n" .
2886                 (join " | ",
2887                  map { $_ eq $current ?
2888                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
2889                  } @navs);
2890         print "<br/>\n$extra<br/>\n" .
2891               "</div>\n";
2892 }
2893
2894 sub format_paging_nav {
2895         my ($action, $hash, $head, $page, $has_next_link) = @_;
2896         my $paging_nav;
2897
2898
2899         if ($hash ne $head || $page) {
2900                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2901         } else {
2902                 $paging_nav .= "HEAD";
2903         }
2904
2905         if ($page > 0) {
2906                 $paging_nav .= " &sdot; " .
2907                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2908                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2909         } else {
2910                 $paging_nav .= " &sdot; prev";
2911         }
2912
2913         if ($has_next_link) {
2914                 $paging_nav .= " &sdot; " .
2915                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2916                                  -accesskey => "n", -title => "Alt-n"}, "next");
2917         } else {
2918                 $paging_nav .= " &sdot; next";
2919         }
2920
2921         return $paging_nav;
2922 }
2923
2924 ## ......................................................................
2925 ## functions printing or outputting HTML: div
2926
2927 sub git_print_header_div {
2928         my ($action, $title, $hash, $hash_base) = @_;
2929         my %args = ();
2930
2931         $args{'action'} = $action;
2932         $args{'hash'} = $hash if $hash;
2933         $args{'hash_base'} = $hash_base if $hash_base;
2934
2935         print "<div class=\"header\">\n" .
2936               $cgi->a({-href => href(%args), -class => "title"},
2937               $title ? $title : $action) .
2938               "\n</div>\n";
2939 }
2940
2941 #sub git_print_authorship (\%) {
2942 sub git_print_authorship {
2943         my $co = shift;
2944
2945         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2946         print "<div class=\"author_date\">" .
2947               esc_html($co->{'author_name'}) .
2948               " [$ad{'rfc2822'}";
2949         if ($ad{'hour_local'} < 6) {
2950                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2951                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2952         } else {
2953                 printf(" (%02d:%02d %s)",
2954                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2955         }
2956         print "]</div>\n";
2957 }
2958
2959 sub git_print_page_path {
2960         my $name = shift;
2961         my $type = shift;
2962         my $hb = shift;
2963
2964
2965         print "<div class=\"page_path\">";
2966         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2967                       -title => 'tree root'}, to_utf8("[$project]"));
2968         print " / ";
2969         if (defined $name) {
2970                 my @dirname = split '/', $name;
2971                 my $basename = pop @dirname;
2972                 my $fullname = '';
2973
2974                 foreach my $dir (@dirname) {
2975                         $fullname .= ($fullname ? '/' : '') . $dir;
2976                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2977                                                      hash_base=>$hb),
2978                                       -title => $fullname}, esc_path($dir));
2979                         print " / ";
2980                 }
2981                 if (defined $type && $type eq 'blob') {
2982                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2983                                                      hash_base=>$hb),
2984                                       -title => $name}, esc_path($basename));
2985                 } elsif (defined $type && $type eq 'tree') {
2986                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2987                                                      hash_base=>$hb),
2988                                       -title => $name}, esc_path($basename));
2989                         print " / ";
2990                 } else {
2991                         print esc_path($basename);
2992                 }
2993         }
2994         print "<br/></div>\n";
2995 }
2996
2997 # sub git_print_log (\@;%) {
2998 sub git_print_log ($;%) {
2999         my $log = shift;
3000         my %opts = @_;
3001
3002         if ($opts{'-remove_title'}) {
3003                 # remove title, i.e. first line of log
3004                 shift @$log;
3005         }
3006         # remove leading empty lines
3007         while (defined $log->[0] && $log->[0] eq "") {
3008                 shift @$log;
3009         }
3010
3011         # print log
3012         my $signoff = 0;
3013         my $empty = 0;
3014         foreach my $line (@$log) {
3015                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3016                         $signoff = 1;
3017                         $empty = 0;
3018                         if (! $opts{'-remove_signoff'}) {
3019                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3020                                 next;
3021                         } else {
3022                                 # remove signoff lines
3023                                 next;
3024                         }
3025                 } else {
3026                         $signoff = 0;
3027                 }
3028
3029                 # print only one empty line
3030                 # do not print empty line after signoff
3031                 if ($line eq "") {
3032                         next if ($empty || $signoff);
3033                         $empty = 1;
3034                 } else {
3035                         $empty = 0;
3036                 }
3037
3038                 print format_log_line_html($line) . "<br/>\n";
3039         }
3040
3041         if ($opts{'-final_empty_line'}) {
3042                 # end with single empty line
3043                 print "<br/>\n" unless $empty;
3044         }
3045 }
3046
3047 # return link target (what link points to)
3048 sub git_get_link_target {
3049         my $hash = shift;
3050         my $link_target;
3051
3052         # read link
3053         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3054                 or return;
3055         {
3056                 local $/;
3057                 $link_target = <$fd>;
3058         }
3059         close $fd
3060                 or return;
3061
3062         return $link_target;
3063 }
3064
3065 # given link target, and the directory (basedir) the link is in,
3066 # return target of link relative to top directory (top tree);
3067 # return undef if it is not possible (including absolute links).
3068 sub normalize_link_target {
3069         my ($link_target, $basedir, $hash_base) = @_;
3070
3071         # we can normalize symlink target only if $hash_base is provided
3072         return unless $hash_base;
3073
3074         # absolute symlinks (beginning with '/') cannot be normalized
3075         return if (substr($link_target, 0, 1) eq '/');
3076
3077         # normalize link target to path from top (root) tree (dir)
3078         my $path;
3079         if ($basedir) {
3080                 $path = $basedir . '/' . $link_target;
3081         } else {
3082                 # we are in top (root) tree (dir)
3083                 $path = $link_target;
3084         }
3085
3086         # remove //, /./, and /../
3087         my @path_parts;
3088         foreach my $part (split('/', $path)) {
3089                 # discard '.' and ''
3090                 next if (!$part || $part eq '.');
3091                 # handle '..'
3092                 if ($part eq '..') {
3093                         if (@path_parts) {
3094                                 pop @path_parts;
3095                         } else {
3096                                 # link leads outside repository (outside top dir)
3097                                 return;
3098                         }
3099                 } else {
3100                         push @path_parts, $part;
3101                 }
3102         }
3103         $path = join('/', @path_parts);
3104
3105         return $path;
3106 }
3107
3108 # print tree entry (row of git_tree), but without encompassing <tr> element
3109 sub git_print_tree_entry {
3110         my ($t, $basedir, $hash_base, $have_blame) = @_;
3111
3112         my %base_key = ();
3113         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3114
3115         # The format of a table row is: mode list link.  Where mode is
3116         # the mode of the entry, list is the name of the entry, an href,
3117         # and link is the action links of the entry.
3118
3119         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3120         if ($t->{'type'} eq "blob") {
3121                 print "<td class=\"list\">" .
3122                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3123                                                file_name=>"$basedir$t->{'name'}", %base_key),
3124                                 -class => "list"}, esc_path($t->{'name'}));
3125                 if (S_ISLNK(oct $t->{'mode'})) {
3126                         my $link_target = git_get_link_target($t->{'hash'});
3127                         if ($link_target) {
3128                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3129                                 if (defined $norm_target) {
3130                                         print " -> " .
3131                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3132                                                                      file_name=>$norm_target),
3133                                                        -title => $norm_target}, esc_path($link_target));
3134                                 } else {
3135                                         print " -> " . esc_path($link_target);
3136                                 }
3137                         }
3138                 }
3139                 print "</td>\n";
3140                 print "<td class=\"link\">";
3141                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3142                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3143                               "blob");
3144                 if ($have_blame) {
3145                         print " | " .
3146                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3147                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3148                                       "blame");
3149                 }
3150                 if (defined $hash_base) {
3151                         print " | " .
3152                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3153                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3154                                       "history");
3155                 }
3156                 print " | " .
3157                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3158                                                file_name=>"$basedir$t->{'name'}")},
3159                                 "raw");
3160                 print "</td>\n";
3161
3162         } elsif ($t->{'type'} eq "tree") {
3163                 print "<td class=\"list\">";
3164                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3165                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3166                               esc_path($t->{'name'}));
3167                 print "</td>\n";
3168                 print "<td class=\"link\">";
3169                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3170                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3171                               "tree");
3172                 if (defined $hash_base) {
3173                         print " | " .
3174                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3175                                                      file_name=>"$basedir$t->{'name'}")},
3176                                       "history");
3177                 }
3178                 print "</td>\n";
3179         } else {
3180                 # unknown object: we can only present history for it
3181                 # (this includes 'commit' object, i.e. submodule support)
3182                 print "<td class=\"list\">" .
3183                       esc_path($t->{'name'}) .
3184                       "</td>\n";
3185                 print "<td class=\"link\">";
3186                 if (defined $hash_base) {
3187                         print $cgi->a({-href => href(action=>"history",
3188                                                      hash_base=>$hash_base,
3189                                                      file_name=>"$basedir$t->{'name'}")},
3190                                       "history");
3191                 }
3192                 print "</td>\n";
3193         }
3194 }
3195
3196 ## ......................................................................
3197 ## functions printing large fragments of HTML
3198
3199 # get pre-image filenames for merge (combined) diff
3200 sub fill_from_file_info {
3201         my ($diff, @parents) = @_;
3202
3203         $diff->{'from_file'} = [ ];
3204         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3205         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3206                 if ($diff->{'status'}[$i] eq 'R' ||
3207                     $diff->{'status'}[$i] eq 'C') {
3208                         $diff->{'from_file'}[$i] =
3209                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3210                 }
3211         }
3212
3213         return $diff;
3214 }
3215
3216 # is current raw difftree line of file deletion
3217 sub is_deleted {
3218         my $diffinfo = shift;
3219
3220         return $diffinfo->{'to_id'} eq ('0' x 40);
3221 }
3222
3223 # does patch correspond to [previous] difftree raw line
3224 # $diffinfo  - hashref of parsed raw diff format
3225 # $patchinfo - hashref of parsed patch diff format
3226 #              (the same keys as in $diffinfo)
3227 sub is_patch_split {
3228         my ($diffinfo, $patchinfo) = @_;
3229
3230         return defined $diffinfo && defined $patchinfo
3231                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3232 }
3233
3234
3235 sub git_difftree_body {
3236         my ($difftree, $hash, @parents) = @_;
3237         my ($parent) = $parents[0];
3238         my ($have_blame) = gitweb_check_feature('blame');
3239         print "<div class=\"list_head\">\n";
3240         if ($#{$difftree} > 10) {
3241                 print(($#{$difftree} + 1) . " files changed:\n");
3242         }
3243         print "</div>\n";
3244
3245         print "<table class=\"" .
3246               (@parents > 1 ? "combined " : "") .
3247               "diff_tree\">\n";
3248
3249         # header only for combined diff in 'commitdiff' view
3250         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3251         if ($has_header) {
3252                 # table header
3253                 print "<thead><tr>\n" .
3254                        "<th></th><th></th>\n"; # filename, patchN link
3255                 for (my $i = 0; $i < @parents; $i++) {
3256                         my $par = $parents[$i];
3257                         print "<th>" .
3258                               $cgi->a({-href => href(action=>"commitdiff",
3259                                                      hash=>$hash, hash_parent=>$par),
3260                                        -title => 'commitdiff to parent number ' .
3261                                                   ($i+1) . ': ' . substr($par,0,7)},
3262                                       $i+1) .
3263                               "&nbsp;</th>\n";
3264                 }
3265                 print "</tr></thead>\n<tbody>\n";
3266         }
3267
3268         my $alternate = 1;
3269         my $patchno = 0;
3270         foreach my $line (@{$difftree}) {
3271                 my $diff = parsed_difftree_line($line);
3272
3273                 if ($alternate) {
3274                         print "<tr class=\"dark\">\n";
3275                 } else {
3276                         print "<tr class=\"light\">\n";
3277                 }
3278                 $alternate ^= 1;
3279
3280                 if (exists $diff->{'nparents'}) { # combined diff
3281
3282                         fill_from_file_info($diff, @parents)
3283                                 unless exists $diff->{'from_file'};
3284
3285                         if (!is_deleted($diff)) {
3286                                 # file exists in the result (child) commit
3287                                 print "<td>" .
3288                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3289                                                              file_name=>$diff->{'to_file'},
3290                                                              hash_base=>$hash),
3291                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3292                                       "</td>\n";
3293                         } else {
3294                                 print "<td>" .
3295                                       esc_path($diff->{'to_file'}) .
3296                                       "</td>\n";
3297                         }
3298
3299                         if ($action eq 'commitdiff') {
3300                                 # link to patch
3301                                 $patchno++;
3302                                 print "<td class=\"link\">" .
3303                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3304                                       " | " .
3305                                       "</td>\n";
3306                         }
3307
3308                         my $has_history = 0;
3309                         my $not_deleted = 0;
3310                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3311                                 my $hash_parent = $parents[$i];
3312                                 my $from_hash = $diff->{'from_id'}[$i];
3313                                 my $from_path = $diff->{'from_file'}[$i];
3314                                 my $status = $diff->{'status'}[$i];
3315
3316                                 $has_history ||= ($status ne 'A');
3317                                 $not_deleted ||= ($status ne 'D');
3318
3319                                 if ($status eq 'A') {
3320                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3321                                 } elsif ($status eq 'D') {
3322                                         print "<td class=\"link\">" .
3323                                               $cgi->a({-href => href(action=>"blob",
3324                                                                      hash_base=>$hash,
3325                                                                      hash=>$from_hash,
3326                                                                      file_name=>$from_path)},
3327                                                       "blob" . ($i+1)) .
3328                                               " | </td>\n";
3329                                 } else {
3330                                         if ($diff->{'to_id'} eq $from_hash) {
3331                                                 print "<td class=\"link nochange\">";
3332                                         } else {
3333                                                 print "<td class=\"link\">";
3334                                         }
3335                                         print $cgi->a({-href => href(action=>"blobdiff",
3336                                                                      hash=>$diff->{'to_id'},
3337                                                                      hash_parent=>$from_hash,
3338                                                                      hash_base=>$hash,
3339                                                                      hash_parent_base=>$hash_parent,
3340                                                                      file_name=>$diff->{'to_file'},
3341                                                                      file_parent=>$from_path)},
3342                                                       "diff" . ($i+1)) .
3343                                               " | </td>\n";
3344                                 }
3345                         }
3346
3347                         print "<td class=\"link\">";
3348                         if ($not_deleted) {
3349                                 print $cgi->a({-href => href(action=>"blob",
3350                                                              hash=>$diff->{'to_id'},
3351                                                              file_name=>$diff->{'to_file'},
3352                                                              hash_base=>$hash)},
3353                                               "blob");
3354                                 print " | " if ($has_history);
3355                         }
3356                         if ($has_history) {
3357                                 print $cgi->a({-href => href(action=>"history",
3358                                                              file_name=>$diff->{'to_file'},
3359                                                              hash_base=>$hash)},
3360                                               "history");
3361                         }
3362                         print "</td>\n";
3363
3364                         print "</tr>\n";
3365                         next; # instead of 'else' clause, to avoid extra indent
3366                 }
3367                 # else ordinary diff
3368
3369                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3370                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3371                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3372                         $to_mode_oct = oct $diff->{'to_mode'};
3373                         if (S_ISREG($to_mode_oct)) { # only for regular file
3374                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3375                         }
3376                         $to_file_type = file_type($diff->{'to_mode'});
3377                 }
3378                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3379                         $from_mode_oct = oct $diff->{'from_mode'};
3380                         if (S_ISREG($to_mode_oct)) { # only for regular file
3381                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3382                         }
3383                         $from_file_type = file_type($diff->{'from_mode'});
3384                 }
3385
3386                 if ($diff->{'status'} eq "A") { # created
3387                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3388                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3389                         $mode_chng   .= "]</span>";
3390                         print "<td>";
3391                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3392                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3393                                       -class => "list"}, esc_path($diff->{'file'}));
3394                         print "</td>\n";
3395                         print "<td>$mode_chng</td>\n";
3396                         print "<td class=\"link\">";
3397                         if ($action eq 'commitdiff') {
3398                                 # link to patch
3399                                 $patchno++;
3400                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3401                                 print " | ";
3402                         }
3403                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3404                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3405                                       "blob");
3406                         print "</td>\n";
3407
3408                 } elsif ($diff->{'status'} eq "D") { # deleted
3409                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3410                         print "<td>";
3411                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3412                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3413                                        -class => "list"}, esc_path($diff->{'file'}));
3414                         print "</td>\n";
3415                         print "<td>$mode_chng</td>\n";
3416                         print "<td class=\"link\">";
3417                         if ($action eq 'commitdiff') {
3418                                 # link to patch
3419                                 $patchno++;
3420                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3421                                 print " | ";
3422                         }
3423                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3424                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3425                                       "blob") . " | ";
3426                         if ($have_blame) {
3427                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3428                                                              file_name=>$diff->{'file'})},
3429                                               "blame") . " | ";
3430                         }
3431                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3432                                                      file_name=>$diff->{'file'})},
3433                                       "history");
3434                         print "</td>\n";
3435
3436                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3437                         my $mode_chnge = "";
3438                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3439                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3440                                 if ($from_file_type ne $to_file_type) {
3441                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3442                                 }
3443                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3444                                         if ($from_mode_str && $to_mode_str) {
3445                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3446                                         } elsif ($to_mode_str) {
3447                                                 $mode_chnge .= " mode: $to_mode_str";
3448                                         }
3449                                 }
3450                                 $mode_chnge .= "]</span>\n";
3451                         }
3452                         print "<td>";
3453                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3454                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3455                                       -class => "list"}, esc_path($diff->{'file'}));
3456                         print "</td>\n";
3457                         print "<td>$mode_chnge</td>\n";
3458                         print "<td class=\"link\">";
3459                         if ($action eq 'commitdiff') {
3460                                 # link to patch
3461                                 $patchno++;
3462                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3463                                       " | ";
3464                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3465                                 # "commit" view and modified file (not onlu mode changed)
3466                                 print $cgi->a({-href => href(action=>"blobdiff",
3467                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3468                                                              hash_base=>$hash, hash_parent_base=>$parent,
3469                                                              file_name=>$diff->{'file'})},
3470                                               "diff") .
3471                                       " | ";
3472                         }
3473                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3474                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3475                                        "blob") . " | ";
3476                         if ($have_blame) {
3477                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3478                                                              file_name=>$diff->{'file'})},
3479                                               "blame") . " | ";
3480                         }
3481                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3482                                                      file_name=>$diff->{'file'})},
3483                                       "history");
3484                         print "</td>\n";
3485
3486                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3487                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3488                         my $nstatus = $status_name{$diff->{'status'}};
3489                         my $mode_chng = "";
3490                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3491                                 # mode also for directories, so we cannot use $to_mode_str
3492                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3493                         }
3494                         print "<td>" .
3495                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3496                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3497                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3498                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3499                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3500                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3501                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3502                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3503                               "<td class=\"link\">";
3504                         if ($action eq 'commitdiff') {
3505                                 # link to patch
3506                                 $patchno++;
3507                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3508                                       " | ";
3509                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3510                                 # "commit" view and modified file (not only pure rename or copy)
3511                                 print $cgi->a({-href => href(action=>"blobdiff",
3512                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3513                                                              hash_base=>$hash, hash_parent_base=>$parent,
3514                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3515                                               "diff") .
3516                                       " | ";
3517                         }
3518                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3519                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3520                                       "blob") . " | ";
3521                         if ($have_blame) {
3522                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3523                                                              file_name=>$diff->{'to_file'})},
3524                                               "blame") . " | ";
3525                         }
3526                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3527                                                     file_name=>$diff->{'to_file'})},
3528                                       "history");
3529                         print "</td>\n";
3530
3531                 } # we should not encounter Unmerged (U) or Unknown (X) status
3532                 print "</tr>\n";
3533         }
3534         print "</tbody>" if $has_header;
3535         print "</table>\n";
3536 }
3537
3538 sub git_patchset_body {
3539         my ($fd, $difftree, $hash, @hash_parents) = @_;
3540         my ($hash_parent) = $hash_parents[0];
3541
3542         my $is_combined = (@hash_parents > 1);
3543         my $patch_idx = 0;
3544         my $patch_number = 0;
3545         my $patch_line;
3546         my $diffinfo;
3547         my $to_name;
3548         my (%from, %to);
3549
3550         print "<div class=\"patchset\">\n";
3551
3552         # skip to first patch
3553         while ($patch_line = <$fd>) {
3554                 chomp $patch_line;
3555
3556                 last if ($patch_line =~ m/^diff /);
3557         }
3558
3559  PATCH:
3560         while ($patch_line) {
3561
3562                 # parse "git diff" header line
3563                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3564                         # $1 is from_name, which we do not use
3565                         $to_name = unquote($2);
3566                         $to_name =~ s!^b/!!;
3567                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3568                         # $1 is 'cc' or 'combined', which we do not use
3569                         $to_name = unquote($2);
3570                 } else {
3571                         $to_name = undef;
3572                 }
3573
3574                 # check if current patch belong to current raw line
3575                 # and parse raw git-diff line if needed
3576                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3577                         # this is continuation of a split patch
3578                         print "<div class=\"patch cont\">\n";
3579                 } else {
3580                         # advance raw git-diff output if needed
3581                         $patch_idx++ if defined $diffinfo;
3582
3583                         # read and prepare patch information
3584                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3585
3586                         # compact combined diff output can have some patches skipped
3587                         # find which patch (using pathname of result) we are at now;
3588                         if ($is_combined) {
3589                                 while ($to_name ne $diffinfo->{'to_file'}) {
3590                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3591                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3592                                               "</div>\n";  # class="patch"
3593
3594                                         $patch_idx++;
3595                                         $patch_number++;
3596
3597                                         last if $patch_idx > $#$difftree;
3598                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3599                                 }
3600                         }
3601
3602                         # modifies %from, %to hashes
3603                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3604
3605                         # this is first patch for raw difftree line with $patch_idx index
3606                         # we index @$difftree array from 0, but number patches from 1
3607                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3608                 }
3609
3610                 # git diff header
3611                 #assert($patch_line =~ m/^diff /) if DEBUG;
3612                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3613                 $patch_number++;
3614                 # print "git diff" header
3615                 print format_git_diff_header_line($patch_line, $diffinfo,
3616                                                   \%from, \%to);
3617
3618                 # print extended diff header
3619                 print "<div class=\"diff extended_header\">\n";
3620         EXTENDED_HEADER:
3621                 while ($patch_line = <$fd>) {
3622                         chomp $patch_line;
3623
3624                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3625
3626                         print format_extended_diff_header_line($patch_line, $diffinfo,
3627                                                                \%from, \%to);
3628                 }
3629                 print "</div>\n"; # class="diff extended_header"
3630
3631                 # from-file/to-file diff header
3632                 if (! $patch_line) {
3633                         print "</div>\n"; # class="patch"
3634                         last PATCH;
3635                 }
3636                 next PATCH if ($patch_line =~ m/^diff /);
3637                 #assert($patch_line =~ m/^---/) if DEBUG;
3638
3639                 my $last_patch_line = $patch_line;
3640                 $patch_line = <$fd>;
3641                 chomp $patch_line;
3642                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3643
3644                 print format_diff_from_to_header($last_patch_line, $patch_line,
3645                                                  $diffinfo, \%from, \%to,
3646                                                  @hash_parents);
3647
3648                 # the patch itself
3649         LINE:
3650                 while ($patch_line = <$fd>) {
3651                         chomp $patch_line;
3652
3653                         next PATCH if ($patch_line =~ m/^diff /);
3654
3655                         print format_diff_line($patch_line, \%from, \%to);
3656                 }
3657
3658         } continue {
3659                 print "</div>\n"; # class="patch"
3660         }
3661
3662         # for compact combined (--cc) format, with chunk and patch simpliciaction
3663         # patchset might be empty, but there might be unprocessed raw lines
3664         for (++$patch_idx if $patch_number > 0;
3665              $patch_idx < @$difftree;
3666              ++$patch_idx) {
3667                 # read and prepare patch information
3668                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3669
3670                 # generate anchor for "patch" links in difftree / whatchanged part
3671                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3672                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3673                       "</div>\n";  # class="patch"
3674
3675                 $patch_number++;
3676         }
3677
3678         if ($patch_number == 0) {
3679                 if (@hash_parents > 1) {
3680                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3681                 } else {
3682                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3683                 }
3684         }
3685
3686         print "</div>\n"; # class="patchset"
3687 }
3688
3689 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3690
3691 # fills project list info (age, description, owner, forks) for each
3692 # project in the list, removing invalid projects from returned list
3693 # NOTE: modifies $projlist, but does not remove entries from it
3694 sub fill_project_list_info {
3695         my ($projlist, $check_forks) = @_;
3696         my @projects;
3697
3698         my $show_ctags = gitweb_check_feature('ctags');
3699  PROJECT:
3700         foreach my $pr (@$projlist) {
3701                 my (@activity) = git_get_last_activity($pr->{'path'});
3702                 unless (@activity) {
3703                         next PROJECT;
3704                 }
3705                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3706                 if (!defined $pr->{'descr'}) {
3707                         my $descr = git_get_project_description($pr->{'path'}) || "";
3708                         $descr = to_utf8($descr);
3709                         $pr->{'descr_long'} = $descr;
3710                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3711                 }
3712                 if (!defined $pr->{'owner'}) {
3713                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3714                 }
3715                 if ($check_forks) {
3716                         my $pname = $pr->{'path'};
3717                         if (($pname =~ s/\.git$//) &&
3718                             ($pname !~ /\/$/) &&
3719                             (-d "$projectroot/$pname")) {
3720                                 $pr->{'forks'} = "-d $projectroot/$pname";
3721                         }       else {
3722                                 $pr->{'forks'} = 0;
3723                         }
3724                 }
3725                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3726                 push @projects, $pr;
3727         }
3728
3729         return @projects;
3730 }
3731
3732 # print 'sort by' <th> element, generating 'sort by $name' replay link
3733 # if that order is not selected
3734 sub print_sort_th {
3735         my ($name, $order, $header) = @_;
3736         $header ||= ucfirst($name);
3737
3738         if ($order eq $name) {
3739                 print "<th>$header</th>\n";
3740         } else {
3741                 print "<th>" .
3742                       $cgi->a({-href => href(-replay=>1, order=>$name),
3743                                -class => "header"}, $header) .
3744                       "</th>\n";
3745         }
3746 }
3747
3748 sub git_project_list_body {
3749         # actually uses global variable $project
3750         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3751
3752         my ($check_forks) = gitweb_check_feature('forks');
3753         my @projects = fill_project_list_info($projlist, $check_forks);
3754
3755         $order ||= $default_projects_order;
3756         $from = 0 unless defined $from;
3757         $to = $#projects if (!defined $to || $#projects < $to);
3758
3759         my %order_info = (
3760                 project => { key => 'path', type => 'str' },
3761                 descr => { key => 'descr_long', type => 'str' },
3762                 owner => { key => 'owner', type => 'str' },
3763                 age => { key => 'age', type => 'num' }
3764         );
3765         my $oi = $order_info{$order};
3766         if ($oi->{'type'} eq 'str') {
3767                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3768         } else {
3769                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3770         }
3771
3772         my $show_ctags = gitweb_check_feature('ctags');
3773         if ($show_ctags) {
3774                 my %ctags;
3775                 foreach my $p (@projects) {
3776                         foreach my $ct (keys %{$p->{'ctags'}}) {
3777                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3778                         }
3779                 }
3780                 my $cloud = git_populate_project_tagcloud(\%ctags);
3781                 print git_show_project_tagcloud($cloud, 64);
3782         }
3783
3784         print "<table class=\"project_list\">\n";
3785         unless ($no_header) {
3786                 print "<tr>\n";
3787                 if ($check_forks) {
3788                         print "<th></th>\n";
3789                 }
3790                 print_sort_th('project', $order, 'Project');
3791                 print_sort_th('descr', $order, 'Description');
3792                 print_sort_th('owner', $order, 'Owner');
3793                 print_sort_th('age', $order, 'Last Change');
3794                 print "<th></th>\n" . # for links
3795                       "</tr>\n";
3796         }
3797         my $alternate = 1;
3798         my $tagfilter = $cgi->param('by_tag');
3799         for (my $i = $from; $i <= $to; $i++) {
3800                 my $pr = $projects[$i];
3801
3802                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3803                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
3804                         and not $pr->{'descr_long'} =~ /$searchtext/;
3805                 # Weed out forks or non-matching entries of search
3806                 if ($check_forks) {
3807                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
3808                         $forkbase="^$forkbase" if $forkbase;
3809                         next if not $searchtext and not $tagfilter and $show_ctags
3810                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
3811                 }
3812
3813                 if ($alternate) {
3814                         print "<tr class=\"dark\">\n";
3815                 } else {
3816                         print "<tr class=\"light\">\n";
3817                 }
3818                 $alternate ^= 1;
3819                 if ($check_forks) {
3820                         print "<td>";
3821                         if ($pr->{'forks'}) {
3822                                 print "<!-- $pr->{'forks'} -->\n";
3823                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3824                         }
3825                         print "</td>\n";
3826                 }
3827                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3828                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3829                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3830                                         -class => "list", -title => $pr->{'descr_long'}},
3831                                         esc_html($pr->{'descr'})) . "</td>\n" .
3832                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3833                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3834                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3835                       "<td class=\"link\">" .
3836                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3837                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3838                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3839                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3840                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3841                       "</td>\n" .
3842                       "</tr>\n";
3843         }
3844         if (defined $extra) {
3845                 print "<tr>\n";
3846                 if ($check_forks) {
3847                         print "<td></td>\n";
3848                 }
3849                 print "<td colspan=\"5\">$extra</td>\n" .
3850                       "</tr>\n";
3851         }
3852         print "</table>\n";
3853 }
3854
3855 sub git_shortlog_body {
3856         # uses global variable $project
3857         my ($commitlist, $from, $to, $refs, $extra) = @_;
3858
3859         $from = 0 unless defined $from;
3860         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3861
3862         print "<table class=\"shortlog\">\n";
3863         my $alternate = 1;
3864         for (my $i = $from; $i <= $to; $i++) {
3865                 my %co = %{$commitlist->[$i]};
3866                 my $commit = $co{'id'};
3867                 my $ref = format_ref_marker($refs, $commit);
3868                 if ($alternate) {
3869                         print "<tr class=\"dark\">\n";
3870                 } else {
3871                         print "<tr class=\"light\">\n";
3872                 }
3873                 $alternate ^= 1;
3874                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3875                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3876                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3877                       "<td><i>" . $author . "</i></td>\n" .
3878                       "<td>";
3879                 print format_subject_html($co{'title'}, $co{'title_short'},
3880                                           href(action=>"commit", hash=>$commit), $ref);
3881                 print "</td>\n" .
3882                       "<td class=\"link\">" .
3883                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3884                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3885                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3886                 my $snapshot_links = format_snapshot_links($commit);
3887                 if (defined $snapshot_links) {
3888                         print " | " . $snapshot_links;
3889                 }
3890                 print "</td>\n" .
3891                       "</tr>\n";
3892         }
3893         if (defined $extra) {
3894                 print "<tr>\n" .
3895                       "<td colspan=\"4\">$extra</td>\n" .
3896                       "</tr>\n";
3897         }
3898         print "</table>\n";
3899 }
3900
3901 sub git_history_body {
3902         # Warning: assumes constant type (blob or tree) during history
3903         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3904
3905         $from = 0 unless defined $from;
3906         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3907
3908         print "<table class=\"history\">\n";
3909         my $alternate = 1;
3910         for (my $i = $from; $i <= $to; $i++) {
3911                 my %co = %{$commitlist->[$i]};
3912                 if (!%co) {
3913                         next;
3914                 }
3915                 my $commit = $co{'id'};
3916
3917                 my $ref = format_ref_marker($refs, $commit);
3918
3919                 if ($alternate) {
3920                         print "<tr class=\"dark\">\n";
3921                 } else {
3922                         print "<tr class=\"light\">\n";
3923                 }
3924                 $alternate ^= 1;
3925         # shortlog uses      chop_str($co{'author_name'}, 10)
3926                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3927                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3928                       "<td><i>" . $author . "</i></td>\n" .
3929                       "<td>";
3930                 # originally git_history used chop_str($co{'title'}, 50)
3931                 print format_subject_html($co{'title'}, $co{'title_short'},
3932                                           href(action=>"commit", hash=>$commit), $ref);
3933                 print "</td>\n" .
3934                       "<td class=\"link\">" .
3935                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3936                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3937
3938                 if ($ftype eq 'blob') {
3939                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3940                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3941                         if (defined $blob_current && defined $blob_parent &&
3942                                         $blob_current ne $blob_parent) {
3943                                 print " | " .
3944                                         $cgi->a({-href => href(action=>"blobdiff",
3945                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3946                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3947                                                                file_name=>$file_name)},
3948                                                 "diff to current");
3949                         }
3950                 }
3951                 print "</td>\n" .
3952                       "</tr>\n";
3953         }
3954         if (defined $extra) {
3955                 print "<tr>\n" .
3956                       "<td colspan=\"4\">$extra</td>\n" .
3957                       "</tr>\n";
3958         }
3959         print "</table>\n";
3960 }
3961
3962 sub git_tags_body {
3963         # uses global variable $project
3964         my ($taglist, $from, $to, $extra) = @_;
3965         $from = 0 unless defined $from;
3966         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3967
3968         print "<table class=\"tags\">\n";
3969         my $alternate = 1;
3970         for (my $i = $from; $i <= $to; $i++) {
3971                 my $entry = $taglist->[$i];
3972                 my %tag = %$entry;
3973                 my $comment = $tag{'subject'};
3974                 my $comment_short;
3975                 if (defined $comment) {
3976                         $comment_short = chop_str($comment, 30, 5);
3977                 }
3978                 if ($alternate) {
3979                         print "<tr class=\"dark\">\n";
3980                 } else {
3981                         print "<tr class=\"light\">\n";
3982                 }
3983                 $alternate ^= 1;
3984                 if (defined $tag{'age'}) {
3985                         print "<td><i>$tag{'age'}</i></td>\n";
3986                 } else {
3987                         print "<td></td>\n";
3988                 }
3989                 print "<td>" .
3990                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3991                                -class => "list name"}, esc_html($tag{'name'})) .
3992                       "</td>\n" .
3993                       "<td>";
3994                 if (defined $comment) {
3995                         print format_subject_html($comment, $comment_short,
3996                                                   href(action=>"tag", hash=>$tag{'id'}));
3997                 }
3998                 print "</td>\n" .
3999                       "<td class=\"selflink\">";
4000                 if ($tag{'type'} eq "tag") {
4001                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4002                 } else {
4003                         print "&nbsp;";
4004                 }
4005                 print "</td>\n" .
4006                       "<td class=\"link\">" . " | " .
4007                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4008                 if ($tag{'reftype'} eq "commit") {
4009                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4010                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4011                 } elsif ($tag{'reftype'} eq "blob") {
4012                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4013                 }
4014                 print "</td>\n" .
4015                       "</tr>";
4016         }
4017         if (defined $extra) {
4018                 print "<tr>\n" .
4019                       "<td colspan=\"5\">$extra</td>\n" .
4020                       "</tr>\n";
4021         }
4022         print "</table>\n";
4023 }
4024
4025 sub git_heads_body {
4026         # uses global variable $project
4027         my ($headlist, $head, $from, $to, $extra) = @_;
4028         $from = 0 unless defined $from;
4029         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4030
4031         print "<table class=\"heads\">\n";
4032         my $alternate = 1;
4033         for (my $i = $from; $i <= $to; $i++) {
4034                 my $entry = $headlist->[$i];
4035                 my %ref = %$entry;
4036                 my $curr = $ref{'id'} eq $head;
4037                 if ($alternate) {
4038                         print "<tr class=\"dark\">\n";
4039                 } else {
4040                         print "<tr class=\"light\">\n";
4041                 }
4042                 $alternate ^= 1;
4043                 print "<td><i>$ref{'age'}</i></td>\n" .
4044                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4045                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4046                                -class => "list name"},esc_html($ref{'name'})) .
4047                       "</td>\n" .
4048                       "<td class=\"link\">" .
4049                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4050                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4051                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4052                       "</td>\n" .
4053                       "</tr>";
4054         }
4055         if (defined $extra) {
4056                 print "<tr>\n" .
4057                       "<td colspan=\"3\">$extra</td>\n" .
4058                       "</tr>\n";
4059         }
4060         print "</table>\n";
4061 }
4062
4063 sub git_search_grep_body {
4064         my ($commitlist, $from, $to, $extra) = @_;
4065         $from = 0 unless defined $from;
4066         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4067
4068         print "<table class=\"commit_search\">\n";
4069         my $alternate = 1;
4070         for (my $i = $from; $i <= $to; $i++) {
4071                 my %co = %{$commitlist->[$i]};
4072                 if (!%co) {
4073                         next;
4074                 }
4075                 my $commit = $co{'id'};
4076                 if ($alternate) {
4077                         print "<tr class=\"dark\">\n";
4078                 } else {
4079                         print "<tr class=\"light\">\n";
4080                 }
4081                 $alternate ^= 1;
4082                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4083                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4084                       "<td><i>" . $author . "</i></td>\n" .
4085                       "<td>" .
4086                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4087                                -class => "list subject"},
4088                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4089                 my $comment = $co{'comment'};
4090                 foreach my $line (@$comment) {
4091                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4092                                 my ($lead, $match, $trail) = ($1, $2, $3);
4093                                 $match = chop_str($match, 70, 5, 'center');
4094                                 my $contextlen = int((80 - length($match))/2);
4095                                 $contextlen = 30 if ($contextlen > 30);
4096                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4097                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4098
4099                                 $lead  = esc_html($lead);
4100                                 $match = esc_html($match);
4101                                 $trail = esc_html($trail);
4102
4103                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4104                         }
4105                 }
4106                 print "</td>\n" .
4107                       "<td class=\"link\">" .
4108                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4109                       " | " .
4110                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4111                       " | " .
4112                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4113                 print "</td>\n" .
4114                       "</tr>\n";
4115         }
4116         if (defined $extra) {
4117                 print "<tr>\n" .
4118                       "<td colspan=\"3\">$extra</td>\n" .
4119                       "</tr>\n";
4120         }
4121         print "</table>\n";
4122 }
4123
4124 ## ======================================================================
4125 ## ======================================================================
4126 ## actions
4127
4128 sub git_project_list {
4129         my $order = $cgi->param('o');
4130         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4131                 die_error(400, "Unknown order parameter");
4132         }
4133
4134         my @list = git_get_projects_list();
4135         if (!@list) {
4136                 die_error(404, "No projects found");
4137         }
4138
4139         git_header_html();
4140         if (-f $home_text) {
4141                 print "<div class=\"index_include\">\n";
4142                 open (my $fd, $home_text);
4143                 print <$fd>;
4144                 close $fd;
4145                 print "</div>\n";
4146         }
4147         print $cgi->startform(-method => "get") .
4148               "<p class=\"projsearch\">Search:\n" .
4149               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4150               "</p>" .
4151               $cgi->end_form() . "\n";
4152         git_project_list_body(\@list, $order);
4153         git_footer_html();
4154 }
4155
4156 sub git_forks {
4157         my $order = $cgi->param('o');
4158         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4159                 die_error(400, "Unknown order parameter");
4160         }
4161
4162         my @list = git_get_projects_list($project);
4163         if (!@list) {
4164                 die_error(404, "No forks found");
4165         }
4166
4167         git_header_html();
4168         git_print_page_nav('','');
4169         git_print_header_div('summary', "$project forks");
4170         git_project_list_body(\@list, $order);
4171         git_footer_html();
4172 }
4173
4174 sub git_project_index {
4175         my @projects = git_get_projects_list($project);
4176
4177         print $cgi->header(
4178                 -type => 'text/plain',
4179                 -charset => 'utf-8',
4180                 -content_disposition => 'inline; filename="index.aux"');
4181
4182         foreach my $pr (@projects) {
4183                 if (!exists $pr->{'owner'}) {
4184                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4185                 }
4186
4187                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4188                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4189                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4190                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4191                 $path  =~ s/ /\+/g;
4192                 $owner =~ s/ /\+/g;
4193
4194                 print "$path $owner\n";
4195         }
4196 }
4197
4198 sub git_summary {
4199         my $descr = git_get_project_description($project) || "none";
4200         my %co = parse_commit("HEAD");
4201         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4202         my $head = $co{'id'};
4203
4204         my $owner = git_get_project_owner($project);
4205
4206         my $refs = git_get_references();
4207         # These get_*_list functions return one more to allow us to see if
4208         # there are more ...
4209         my @taglist  = git_get_tags_list(16);
4210         my @headlist = git_get_heads_list(16);
4211         my @forklist;
4212         my ($check_forks) = gitweb_check_feature('forks');
4213
4214         if ($check_forks) {
4215                 @forklist = git_get_projects_list($project);
4216         }
4217
4218         git_header_html();
4219         git_print_page_nav('summary','', $head);
4220
4221         print "<div class=\"title\">&nbsp;</div>\n";
4222         print "<table class=\"projects_list\">\n" .
4223               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4224               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4225         if (defined $cd{'rfc2822'}) {
4226                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4227         }
4228
4229         # use per project git URL list in $projectroot/$project/cloneurl
4230         # or make project git URL from git base URL and project name
4231         my $url_tag = "URL";
4232         my @url_list = git_get_project_url_list($project);
4233         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4234         foreach my $git_url (@url_list) {
4235                 next unless $git_url;
4236                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4237                 $url_tag = "";
4238         }
4239
4240         # Tag cloud
4241         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4242         if ($show_ctags) {
4243                 my $ctags = git_get_project_ctags($project);
4244                 my $cloud = git_populate_project_tagcloud($ctags);
4245                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4246                 print "</td>\n<td>" unless %$ctags;
4247                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4248                 print "</td>\n<td>" if %$ctags;
4249                 print git_show_project_tagcloud($cloud, 48);
4250                 print "</td></tr>";
4251         }
4252
4253         print "</table>\n";
4254
4255         if (-s "$projectroot/$project/README.html") {
4256                 if (open my $fd, "$projectroot/$project/README.html") {
4257                         print "<div class=\"title\">readme</div>\n" .
4258                               "<div class=\"readme\">\n";
4259                         print $_ while (<$fd>);
4260                         print "\n</div>\n"; # class="readme"
4261                         close $fd;
4262                 }
4263         }
4264
4265         # we need to request one more than 16 (0..15) to check if
4266         # those 16 are all
4267         my @commitlist = $head ? parse_commits($head, 17) : ();
4268         if (@commitlist) {
4269                 git_print_header_div('shortlog');
4270                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4271                                   $#commitlist <=  15 ? undef :
4272                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4273         }
4274
4275         if (@taglist) {
4276                 git_print_header_div('tags');
4277                 git_tags_body(\@taglist, 0, 15,
4278                               $#taglist <=  15 ? undef :
4279                               $cgi->a({-href => href(action=>"tags")}, "..."));
4280         }
4281
4282         if (@headlist) {
4283                 git_print_header_div('heads');
4284                 git_heads_body(\@headlist, $head, 0, 15,
4285                                $#headlist <= 15 ? undef :
4286                                $cgi->a({-href => href(action=>"heads")}, "..."));
4287         }
4288
4289         if (@forklist) {
4290                 git_print_header_div('forks');
4291                 git_project_list_body(\@forklist, 'age', 0, 15,
4292                                       $#forklist <= 15 ? undef :
4293                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4294                                       'no_header');
4295         }
4296
4297         git_footer_html();
4298 }
4299
4300 sub git_tag {
4301         my $head = git_get_head_hash($project);
4302         git_header_html();
4303         git_print_page_nav('','', $head,undef,$head);
4304         my %tag = parse_tag($hash);
4305
4306         if (! %tag) {
4307                 die_error(404, "Unknown tag object");
4308         }
4309
4310         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4311         print "<div class=\"title_text\">\n" .
4312               "<table class=\"object_header\">\n" .
4313               "<tr>\n" .
4314               "<td>object</td>\n" .
4315               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4316                                $tag{'object'}) . "</td>\n" .
4317               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4318                                               $tag{'type'}) . "</td>\n" .
4319               "</tr>\n";
4320         if (defined($tag{'author'})) {
4321                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4322                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4323                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4324                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4325                         "</td></tr>\n";
4326         }
4327         print "</table>\n\n" .
4328               "</div>\n";
4329         print "<div class=\"page_body\">";
4330         my $comment = $tag{'comment'};
4331         foreach my $line (@$comment) {
4332                 chomp $line;
4333                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4334         }
4335         print "</div>\n";
4336         git_footer_html();
4337 }
4338
4339 sub git_blame {
4340         my $fd;
4341         my $ftype;
4342
4343         gitweb_check_feature('blame')
4344             or die_error(403, "Blame view not allowed");
4345
4346         die_error(400, "No file name given") unless $file_name;
4347         $hash_base ||= git_get_head_hash($project);
4348         die_error(404, "Couldn't find base commit") unless ($hash_base);
4349         my %co = parse_commit($hash_base)
4350                 or die_error(404, "Commit not found");
4351         if (!defined $hash) {
4352                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4353                         or die_error(404, "Error looking up file");
4354         }
4355         $ftype = git_get_type($hash);
4356         if ($ftype !~ "blob") {
4357                 die_error(400, "Object is not a blob");
4358         }
4359         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4360               $file_name, $hash_base)
4361                 or die_error(500, "Open git-blame failed");
4362         git_header_html();
4363         my $formats_nav =
4364                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4365                         "blob") .
4366                 " | " .
4367                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4368                         "history") .
4369                 " | " .
4370                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4371                         "HEAD");
4372         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4373         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4374         git_print_page_path($file_name, $ftype, $hash_base);
4375         my @rev_color = (qw(light2 dark2));
4376         my $num_colors = scalar(@rev_color);
4377         my $current_color = 0;
4378         my $last_rev;
4379         print <<HTML;
4380 <div class="page_body">
4381 <table class="blame">
4382 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4383 HTML
4384         my %metainfo = ();
4385         while (1) {
4386                 $_ = <$fd>;
4387                 last unless defined $_;
4388                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4389                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4390                 if (!exists $metainfo{$full_rev}) {
4391                         $metainfo{$full_rev} = {};
4392                 }
4393                 my $meta = $metainfo{$full_rev};
4394                 while (<$fd>) {
4395                         last if (s/^\t//);
4396                         if (/^(\S+) (.*)$/) {
4397                                 $meta->{$1} = $2;
4398                         }
4399                 }
4400                 my $data = $_;
4401                 chomp $data;
4402                 my $rev = substr($full_rev, 0, 8);
4403                 my $author = $meta->{'author'};
4404                 my %date = parse_date($meta->{'author-time'},
4405                                       $meta->{'author-tz'});
4406                 my $date = $date{'iso-tz'};
4407                 if ($group_size) {
4408                         $current_color = ++$current_color % $num_colors;
4409                 }
4410                 print "<tr class=\"$rev_color[$current_color]\">\n";
4411                 if ($group_size) {
4412                         print "<td class=\"sha1\"";
4413                         print " title=\"". esc_html($author) . ", $date\"";
4414                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4415                         print ">";
4416                         print $cgi->a({-href => href(action=>"commit",
4417                                                      hash=>$full_rev,
4418                                                      file_name=>$file_name)},
4419                                       esc_html($rev));
4420                         print "</td>\n";
4421                 }
4422                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4423                         or die_error(500, "Open git-rev-parse failed");
4424                 my $parent_commit = <$dd>;
4425                 close $dd;
4426                 chomp($parent_commit);
4427                 my $blamed = href(action => 'blame',
4428                                   file_name => $meta->{'filename'},
4429                                   hash_base => $parent_commit);
4430                 print "<td class=\"linenr\">";
4431                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4432                                 -id => "l$lineno",
4433                                 -class => "linenr" },
4434                               esc_html($lineno));
4435                 print "</td>";
4436                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4437                 print "</tr>\n";
4438         }
4439         print "</table>\n";
4440         print "</div>";
4441         close $fd
4442                 or print "Reading blob failed\n";
4443         git_footer_html();
4444 }
4445
4446 sub git_tags {
4447         my $head = git_get_head_hash($project);
4448         git_header_html();
4449         git_print_page_nav('','', $head,undef,$head);
4450         git_print_header_div('summary', $project);
4451
4452         my @tagslist = git_get_tags_list();
4453         if (@tagslist) {
4454                 git_tags_body(\@tagslist);
4455         }
4456         git_footer_html();
4457 }
4458
4459 sub git_heads {
4460         my $head = git_get_head_hash($project);
4461         git_header_html();
4462         git_print_page_nav('','', $head,undef,$head);
4463         git_print_header_div('summary', $project);
4464
4465         my @headslist = git_get_heads_list();
4466         if (@headslist) {
4467                 git_heads_body(\@headslist, $head);
4468         }
4469         git_footer_html();
4470 }
4471
4472 sub git_blob_plain {
4473         my $type = shift;
4474         my $expires;
4475
4476         if (!defined $hash) {
4477                 if (defined $file_name) {
4478                         my $base = $hash_base || git_get_head_hash($project);
4479                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4480                                 or die_error(404, "Cannot find file");
4481                 } else {
4482                         die_error(400, "No file name defined");
4483                 }
4484         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4485                 # blobs defined by non-textual hash id's can be cached
4486                 $expires = "+1d";
4487         }
4488
4489         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4490                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4491
4492         # content-type (can include charset)
4493         $type = blob_contenttype($fd, $file_name, $type);
4494
4495         # "save as" filename, even when no $file_name is given
4496         my $save_as = "$hash";
4497         if (defined $file_name) {
4498                 $save_as = $file_name;
4499         } elsif ($type =~ m/^text\//) {
4500                 $save_as .= '.txt';
4501         }
4502
4503         print $cgi->header(
4504                 -type => $type,
4505                 -expires => $expires,
4506                 -content_disposition => 'inline; filename="' . $save_as . '"');
4507         undef $/;
4508         binmode STDOUT, ':raw';
4509         print <$fd>;
4510         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4511         $/ = "\n";
4512         close $fd;
4513 }
4514
4515 sub git_blob {
4516         my $expires;
4517
4518         if (!defined $hash) {
4519                 if (defined $file_name) {
4520                         my $base = $hash_base || git_get_head_hash($project);
4521                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4522                                 or die_error(404, "Cannot find file");
4523                 } else {
4524                         die_error(400, "No file name defined");
4525                 }
4526         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4527                 # blobs defined by non-textual hash id's can be cached
4528                 $expires = "+1d";
4529         }
4530
4531         my ($have_blame) = gitweb_check_feature('blame');
4532         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4533                 or die_error(500, "Couldn't cat $file_name, $hash");
4534         my $mimetype = blob_mimetype($fd, $file_name);
4535         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4536                 close $fd;
4537                 return git_blob_plain($mimetype);
4538         }
4539         # we can have blame only for text/* mimetype
4540         $have_blame &&= ($mimetype =~ m!^text/!);
4541
4542         git_header_html(undef, $expires);
4543         my $formats_nav = '';
4544         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4545                 if (defined $file_name) {
4546                         if ($have_blame) {
4547                                 $formats_nav .=
4548                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4549                                                 "blame") .
4550                                         " | ";
4551                         }
4552                         $formats_nav .=
4553                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4554                                         "history") .
4555                                 " | " .
4556                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4557                                         "raw") .
4558                                 " | " .
4559                                 $cgi->a({-href => href(action=>"blob",
4560                                                        hash_base=>"HEAD", file_name=>$file_name)},
4561                                         "HEAD");
4562                 } else {
4563                         $formats_nav .=
4564                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4565                                         "raw");
4566                 }
4567                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4568                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4569         } else {
4570                 print "<div class=\"page_nav\">\n" .
4571                       "<br/><br/></div>\n" .
4572                       "<div class=\"title\">$hash</div>\n";
4573         }
4574         git_print_page_path($file_name, "blob", $hash_base);
4575         print "<div class=\"page_body\">\n";
4576         if ($mimetype =~ m!^image/!) {
4577                 print qq!<img type="$mimetype"!;
4578                 if ($file_name) {
4579                         print qq! alt="$file_name" title="$file_name"!;
4580                 }
4581                 print qq! src="! .
4582                       href(action=>"blob_plain", hash=>$hash,
4583                            hash_base=>$hash_base, file_name=>$file_name) .
4584                       qq!" />\n!;
4585         } else {
4586                 my $nr;
4587                 while (my $line = <$fd>) {
4588                         chomp $line;
4589                         $nr++;
4590                         $line = untabify($line);
4591                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4592                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4593                 }
4594         }
4595         close $fd
4596                 or print "Reading blob failed.\n";
4597         print "</div>";
4598         git_footer_html();
4599 }
4600
4601 sub git_tree {
4602         if (!defined $hash_base) {
4603                 $hash_base = "HEAD";
4604         }
4605         if (!defined $hash) {
4606                 if (defined $file_name) {
4607                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4608                 } else {
4609                         $hash = $hash_base;
4610                 }
4611         }
4612         die_error(404, "No such tree") unless defined($hash);
4613         $/ = "\0";
4614         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4615                 or die_error(500, "Open git-ls-tree failed");
4616         my @entries = map { chomp; $_ } <$fd>;
4617         close $fd or die_error(404, "Reading tree failed");
4618         $/ = "\n";
4619
4620         my $refs = git_get_references();
4621         my $ref = format_ref_marker($refs, $hash_base);
4622         git_header_html();
4623         my $basedir = '';
4624         my ($have_blame) = gitweb_check_feature('blame');
4625         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4626                 my @views_nav = ();
4627                 if (defined $file_name) {
4628                         push @views_nav,
4629                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4630                                         "history"),
4631                                 $cgi->a({-href => href(action=>"tree",
4632                                                        hash_base=>"HEAD", file_name=>$file_name)},
4633                                         "HEAD"),
4634                 }
4635                 my $snapshot_links = format_snapshot_links($hash);
4636                 if (defined $snapshot_links) {
4637                         # FIXME: Should be available when we have no hash base as well.
4638                         push @views_nav, $snapshot_links;
4639                 }
4640                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4641                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4642         } else {
4643                 undef $hash_base;
4644                 print "<div class=\"page_nav\">\n";
4645                 print "<br/><br/></div>\n";
4646                 print "<div class=\"title\">$hash</div>\n";
4647         }
4648         if (defined $file_name) {
4649                 $basedir = $file_name;
4650                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4651                         $basedir .= '/';
4652                 }
4653                 git_print_page_path($file_name, 'tree', $hash_base);
4654         }
4655         print "<div class=\"page_body\">\n";
4656         print "<table class=\"tree\">\n";
4657         my $alternate = 1;
4658         # '..' (top directory) link if possible
4659         if (defined $hash_base &&
4660             defined $file_name && $file_name =~ m![^/]+$!) {
4661                 if ($alternate) {
4662                         print "<tr class=\"dark\">\n";
4663                 } else {
4664                         print "<tr class=\"light\">\n";
4665                 }
4666                 $alternate ^= 1;
4667
4668                 my $up = $file_name;
4669                 $up =~ s!/?[^/]+$!!;
4670                 undef $up unless $up;
4671                 # based on git_print_tree_entry
4672                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4673                 print '<td class="list">';
4674                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4675                                              file_name=>$up)},
4676                               "..");
4677                 print "</td>\n";
4678                 print "<td class=\"link\"></td>\n";
4679
4680                 print "</tr>\n";
4681         }
4682         foreach my $line (@entries) {
4683                 my %t = parse_ls_tree_line($line, -z => 1);
4684
4685                 if ($alternate) {
4686                         print "<tr class=\"dark\">\n";
4687                 } else {
4688                         print "<tr class=\"light\">\n";
4689                 }
4690                 $alternate ^= 1;
4691
4692                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4693
4694                 print "</tr>\n";
4695         }
4696         print "</table>\n" .
4697               "</div>";
4698         git_footer_html();
4699 }
4700
4701 sub git_snapshot {
4702         my @supported_fmts = gitweb_check_feature('snapshot');
4703         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4704
4705         my $format = $cgi->param('sf');
4706         if (!@supported_fmts) {
4707                 die_error(403, "Snapshots not allowed");
4708         }
4709         # default to first supported snapshot format
4710         $format ||= $supported_fmts[0];
4711         if ($format !~ m/^[a-z0-9]+$/) {
4712                 die_error(400, "Invalid snapshot format parameter");
4713         } elsif (!exists($known_snapshot_formats{$format})) {
4714                 die_error(400, "Unknown snapshot format");
4715         } elsif (!grep($_ eq $format, @supported_fmts)) {
4716                 die_error(403, "Unsupported snapshot format");
4717         }
4718
4719         if (!defined $hash) {
4720                 $hash = git_get_head_hash($project);
4721         }
4722
4723         my $name = $project;
4724         $name =~ s,([^/])/*\.git$,$1,;
4725         $name = basename($name);
4726         my $filename = to_utf8($name);
4727         $name =~ s/\047/\047\\\047\047/g;
4728         my $cmd;
4729         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4730         $cmd = quote_command(
4731                 git_cmd(), 'archive',
4732                 "--format=$known_snapshot_formats{$format}{'format'}",
4733                 "--prefix=$name/", $hash);
4734         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4735                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4736         }
4737
4738         print $cgi->header(
4739                 -type => $known_snapshot_formats{$format}{'type'},
4740                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4741                 -status => '200 OK');
4742
4743         open my $fd, "-|", $cmd
4744                 or die_error(500, "Execute git-archive failed");
4745         binmode STDOUT, ':raw';
4746         print <$fd>;
4747         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4748         close $fd;
4749 }
4750
4751 sub git_log {
4752         my $head = git_get_head_hash($project);
4753         if (!defined $hash) {
4754                 $hash = $head;
4755         }
4756         if (!defined $page) {
4757                 $page = 0;
4758         }
4759         my $refs = git_get_references();
4760
4761         my @commitlist = parse_commits($hash, 101, (100 * $page));
4762
4763         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4764
4765         git_header_html();
4766         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4767
4768         if (!@commitlist) {
4769                 my %co = parse_commit($hash);
4770
4771                 git_print_header_div('summary', $project);
4772                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4773         }
4774         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4775         for (my $i = 0; $i <= $to; $i++) {
4776                 my %co = %{$commitlist[$i]};
4777                 next if !%co;
4778                 my $commit = $co{'id'};
4779                 my $ref = format_ref_marker($refs, $commit);
4780                 my %ad = parse_date($co{'author_epoch'});
4781                 git_print_header_div('commit',
4782                                "<span class=\"age\">$co{'age_string'}</span>" .
4783                                esc_html($co{'title'}) . $ref,
4784                                $commit);
4785                 print "<div class=\"title_text\">\n" .
4786                       "<div class=\"log_link\">\n" .
4787                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4788                       " | " .
4789                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4790                       " | " .
4791                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4792                       "<br/>\n" .
4793                       "</div>\n" .
4794                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4795                       "</div>\n";
4796
4797                 print "<div class=\"log_body\">\n";
4798                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4799                 print "</div>\n";
4800         }
4801         if ($#commitlist >= 100) {
4802                 print "<div class=\"page_nav\">\n";
4803                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4804                                -accesskey => "n", -title => "Alt-n"}, "next");
4805                 print "</div>\n";
4806         }
4807         git_footer_html();
4808 }
4809
4810 sub git_commit {
4811         $hash ||= $hash_base || "HEAD";
4812         my %co = parse_commit($hash)
4813             or die_error(404, "Unknown commit object");
4814         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4815         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4816
4817         my $parent  = $co{'parent'};
4818         my $parents = $co{'parents'}; # listref
4819
4820         # we need to prepare $formats_nav before any parameter munging
4821         my $formats_nav;
4822         if (!defined $parent) {
4823                 # --root commitdiff
4824                 $formats_nav .= '(initial)';
4825         } elsif (@$parents == 1) {
4826                 # single parent commit
4827                 $formats_nav .=
4828                         '(parent: ' .
4829                         $cgi->a({-href => href(action=>"commit",
4830                                                hash=>$parent)},
4831                                 esc_html(substr($parent, 0, 7))) .
4832                         ')';
4833         } else {
4834                 # merge commit
4835                 $formats_nav .=
4836                         '(merge: ' .
4837                         join(' ', map {
4838                                 $cgi->a({-href => href(action=>"commit",
4839                                                        hash=>$_)},
4840                                         esc_html(substr($_, 0, 7)));
4841                         } @$parents ) .
4842                         ')';
4843         }
4844
4845         if (!defined $parent) {
4846                 $parent = "--root";
4847         }
4848         my @difftree;
4849         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4850                 @diff_opts,
4851                 (@$parents <= 1 ? $parent : '-c'),
4852                 $hash, "--"
4853                 or die_error(500, "Open git-diff-tree failed");
4854         @difftree = map { chomp; $_ } <$fd>;
4855         close $fd or die_error(404, "Reading git-diff-tree failed");
4856
4857         # non-textual hash id's can be cached
4858         my $expires;
4859         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4860                 $expires = "+1d";
4861         }
4862         my $refs = git_get_references();
4863         my $ref = format_ref_marker($refs, $co{'id'});
4864
4865         git_header_html(undef, $expires);
4866         git_print_page_nav('commit', '',
4867                            $hash, $co{'tree'}, $hash,
4868                            $formats_nav);
4869
4870         if (defined $co{'parent'}) {
4871                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4872         } else {
4873                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4874         }
4875         print "<div class=\"title_text\">\n" .
4876               "<table class=\"object_header\">\n";
4877         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4878               "<tr>" .
4879               "<td></td><td> $ad{'rfc2822'}";
4880         if ($ad{'hour_local'} < 6) {
4881                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4882                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4883         } else {
4884                 printf(" (%02d:%02d %s)",
4885                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4886         }
4887         print "</td>" .
4888               "</tr>\n";
4889         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4890         print "<tr><td></td><td> $cd{'rfc2822'}" .
4891               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4892               "</td></tr>\n";
4893         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4894         print "<tr>" .
4895               "<td>tree</td>" .
4896               "<td class=\"sha1\">" .
4897               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4898                        class => "list"}, $co{'tree'}) .
4899               "</td>" .
4900               "<td class=\"link\">" .
4901               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4902                       "tree");
4903         my $snapshot_links = format_snapshot_links($hash);
4904         if (defined $snapshot_links) {
4905                 print " | " . $snapshot_links;
4906         }
4907         print "</td>" .
4908               "</tr>\n";
4909
4910         foreach my $par (@$parents) {
4911                 print "<tr>" .
4912                       "<td>parent</td>" .
4913                       "<td class=\"sha1\">" .
4914                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4915                                class => "list"}, $par) .
4916                       "</td>" .
4917                       "<td class=\"link\">" .
4918                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4919                       " | " .
4920                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4921                       "</td>" .
4922                       "</tr>\n";
4923         }
4924         print "</table>".
4925               "</div>\n";
4926
4927         print "<div class=\"page_body\">\n";
4928         git_print_log($co{'comment'});
4929         print "</div>\n";
4930
4931         git_difftree_body(\@difftree, $hash, @$parents);
4932
4933         git_footer_html();
4934 }
4935
4936 sub git_object {
4937         # object is defined by:
4938         # - hash or hash_base alone
4939         # - hash_base and file_name
4940         my $type;
4941
4942         # - hash or hash_base alone
4943         if ($hash || ($hash_base && !defined $file_name)) {
4944                 my $object_id = $hash || $hash_base;
4945
4946                 open my $fd, "-|", quote_command(
4947                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4948                         or die_error(404, "Object does not exist");
4949                 $type = <$fd>;
4950                 chomp $type;
4951                 close $fd
4952                         or die_error(404, "Object does not exist");
4953
4954         # - hash_base and file_name
4955         } elsif ($hash_base && defined $file_name) {
4956                 $file_name =~ s,/+$,,;
4957
4958                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4959                         or die_error(404, "Base object does not exist");
4960
4961                 # here errors should not hapen
4962                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4963                         or die_error(500, "Open git-ls-tree failed");
4964                 my $line = <$fd>;
4965                 close $fd;
4966
4967                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4968                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4969                         die_error(404, "File or directory for given base does not exist");
4970                 }
4971                 $type = $2;
4972                 $hash = $3;
4973         } else {
4974                 die_error(400, "Not enough information to find object");
4975         }
4976
4977         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4978                                           hash=>$hash, hash_base=>$hash_base,
4979                                           file_name=>$file_name),
4980                              -status => '302 Found');
4981 }
4982
4983 sub git_blobdiff {
4984         my $format = shift || 'html';
4985
4986         my $fd;
4987         my @difftree;
4988         my %diffinfo;
4989         my $expires;
4990
4991         # preparing $fd and %diffinfo for git_patchset_body
4992         # new style URI
4993         if (defined $hash_base && defined $hash_parent_base) {
4994                 if (defined $file_name) {
4995                         # read raw output
4996                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4997                                 $hash_parent_base, $hash_base,
4998                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4999                                 or die_error(500, "Open git-diff-tree failed");
5000                         @difftree = map { chomp; $_ } <$fd>;
5001                         close $fd
5002                                 or die_error(404, "Reading git-diff-tree failed");
5003                         @difftree
5004                                 or die_error(404, "Blob diff not found");
5005
5006                 } elsif (defined $hash &&
5007                          $hash =~ /[0-9a-fA-F]{40}/) {
5008                         # try to find filename from $hash
5009
5010                         # read filtered raw output
5011                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5012                                 $hash_parent_base, $hash_base, "--"
5013                                 or die_error(500, "Open git-diff-tree failed");
5014                         @difftree =
5015                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5016                                 # $hash == to_id
5017                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5018                                 map { chomp; $_ } <$fd>;
5019                         close $fd
5020                                 or die_error(404, "Reading git-diff-tree failed");
5021                         @difftree
5022                                 or die_error(404, "Blob diff not found");
5023
5024                 } else {
5025                         die_error(400, "Missing one of the blob diff parameters");
5026                 }
5027
5028                 if (@difftree > 1) {
5029                         die_error(400, "Ambiguous blob diff specification");
5030                 }
5031
5032                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5033                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5034                 $file_name   ||= $diffinfo{'to_file'};
5035
5036                 $hash_parent ||= $diffinfo{'from_id'};
5037                 $hash        ||= $diffinfo{'to_id'};
5038
5039                 # non-textual hash id's can be cached
5040                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5041                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5042                         $expires = '+1d';
5043                 }
5044
5045                 # open patch output
5046                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5047                         '-p', ($format eq 'html' ? "--full-index" : ()),
5048                         $hash_parent_base, $hash_base,
5049                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5050                         or die_error(500, "Open git-diff-tree failed");
5051         }
5052
5053         # old/legacy style URI
5054         if (!%diffinfo && # if new style URI failed
5055             defined $hash && defined $hash_parent) {
5056                 # fake git-diff-tree raw output
5057                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5058                 $diffinfo{'from_id'} = $hash_parent;
5059                 $diffinfo{'to_id'}   = $hash;
5060                 if (defined $file_name) {
5061                         if (defined $file_parent) {
5062                                 $diffinfo{'status'} = '2';
5063                                 $diffinfo{'from_file'} = $file_parent;
5064                                 $diffinfo{'to_file'}   = $file_name;
5065                         } else { # assume not renamed
5066                                 $diffinfo{'status'} = '1';
5067                                 $diffinfo{'from_file'} = $file_name;
5068                                 $diffinfo{'to_file'}   = $file_name;
5069                         }
5070                 } else { # no filename given
5071                         $diffinfo{'status'} = '2';
5072                         $diffinfo{'from_file'} = $hash_parent;
5073                         $diffinfo{'to_file'}   = $hash;
5074                 }
5075
5076                 # non-textual hash id's can be cached
5077                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5078                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5079                         $expires = '+1d';
5080                 }
5081
5082                 # open patch output
5083                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5084                         '-p', ($format eq 'html' ? "--full-index" : ()),
5085                         $hash_parent, $hash, "--"
5086                         or die_error(500, "Open git-diff failed");
5087         } else  {
5088                 die_error(400, "Missing one of the blob diff parameters")
5089                         unless %diffinfo;
5090         }
5091
5092         # header
5093         if ($format eq 'html') {
5094                 my $formats_nav =
5095                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5096                                 "raw");
5097                 git_header_html(undef, $expires);
5098                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5099                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5100                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5101                 } else {
5102                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5103                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5104                 }
5105                 if (defined $file_name) {
5106                         git_print_page_path($file_name, "blob", $hash_base);
5107                 } else {
5108                         print "<div class=\"page_path\"></div>\n";
5109                 }
5110
5111         } elsif ($format eq 'plain') {
5112                 print $cgi->header(
5113                         -type => 'text/plain',
5114                         -charset => 'utf-8',
5115                         -expires => $expires,
5116                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5117
5118                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5119
5120         } else {
5121                 die_error(400, "Unknown blobdiff format");
5122         }
5123
5124         # patch
5125         if ($format eq 'html') {
5126                 print "<div class=\"page_body\">\n";
5127
5128                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5129                 close $fd;
5130
5131                 print "</div>\n"; # class="page_body"
5132                 git_footer_html();
5133
5134         } else {
5135                 while (my $line = <$fd>) {
5136                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5137                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5138
5139                         print $line;
5140
5141                         last if $line =~ m!^\+\+\+!;
5142                 }
5143                 local $/ = undef;
5144                 print <$fd>;
5145                 close $fd;
5146         }
5147 }
5148
5149 sub git_blobdiff_plain {
5150         git_blobdiff('plain');
5151 }
5152
5153 sub git_commitdiff {
5154         my $format = shift || 'html';
5155         $hash ||= $hash_base || "HEAD";
5156         my %co = parse_commit($hash)
5157             or die_error(404, "Unknown commit object");
5158
5159         # choose format for commitdiff for merge
5160         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5161                 $hash_parent = '--cc';
5162         }
5163         # we need to prepare $formats_nav before almost any parameter munging
5164         my $formats_nav;
5165         if ($format eq 'html') {
5166                 $formats_nav =
5167                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5168                                 "raw");
5169
5170                 if (defined $hash_parent &&
5171                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5172                         # commitdiff with two commits given
5173                         my $hash_parent_short = $hash_parent;
5174                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5175                                 $hash_parent_short = substr($hash_parent, 0, 7);
5176                         }
5177                         $formats_nav .=
5178                                 ' (from';
5179                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5180                                 if ($co{'parents'}[$i] eq $hash_parent) {
5181                                         $formats_nav .= ' parent ' . ($i+1);
5182                                         last;
5183                                 }
5184                         }
5185                         $formats_nav .= ': ' .
5186                                 $cgi->a({-href => href(action=>"commitdiff",
5187                                                        hash=>$hash_parent)},
5188                                         esc_html($hash_parent_short)) .
5189                                 ')';
5190                 } elsif (!$co{'parent'}) {
5191                         # --root commitdiff
5192                         $formats_nav .= ' (initial)';
5193                 } elsif (scalar @{$co{'parents'}} == 1) {
5194                         # single parent commit
5195                         $formats_nav .=
5196                                 ' (parent: ' .
5197                                 $cgi->a({-href => href(action=>"commitdiff",
5198                                                        hash=>$co{'parent'})},
5199                                         esc_html(substr($co{'parent'}, 0, 7))) .
5200                                 ')';
5201                 } else {
5202                         # merge commit
5203                         if ($hash_parent eq '--cc') {
5204                                 $formats_nav .= ' | ' .
5205                                         $cgi->a({-href => href(action=>"commitdiff",
5206                                                                hash=>$hash, hash_parent=>'-c')},
5207                                                 'combined');
5208                         } else { # $hash_parent eq '-c'
5209                                 $formats_nav .= ' | ' .
5210                                         $cgi->a({-href => href(action=>"commitdiff",
5211                                                                hash=>$hash, hash_parent=>'--cc')},
5212                                                 'compact');
5213                         }
5214                         $formats_nav .=
5215                                 ' (merge: ' .
5216                                 join(' ', map {
5217                                         $cgi->a({-href => href(action=>"commitdiff",
5218                                                                hash=>$_)},
5219                                                 esc_html(substr($_, 0, 7)));
5220                                 } @{$co{'parents'}} ) .
5221                                 ')';
5222                 }
5223         }
5224
5225         my $hash_parent_param = $hash_parent;
5226         if (!defined $hash_parent_param) {
5227                 # --cc for multiple parents, --root for parentless
5228                 $hash_parent_param =
5229                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5230         }
5231
5232         # read commitdiff
5233         my $fd;
5234         my @difftree;
5235         if ($format eq 'html') {
5236                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5237                         "--no-commit-id", "--patch-with-raw", "--full-index",
5238                         $hash_parent_param, $hash, "--"
5239                         or die_error(500, "Open git-diff-tree failed");
5240
5241                 while (my $line = <$fd>) {
5242                         chomp $line;
5243                         # empty line ends raw part of diff-tree output
5244                         last unless $line;
5245                         push @difftree, scalar parse_difftree_raw_line($line);
5246                 }
5247
5248         } elsif ($format eq 'plain') {
5249                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5250                         '-p', $hash_parent_param, $hash, "--"
5251                         or die_error(500, "Open git-diff-tree failed");
5252
5253         } else {
5254                 die_error(400, "Unknown commitdiff format");
5255         }
5256
5257         # non-textual hash id's can be cached
5258         my $expires;
5259         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5260                 $expires = "+1d";
5261         }
5262
5263         # write commit message
5264         if ($format eq 'html') {
5265                 my $refs = git_get_references();
5266                 my $ref = format_ref_marker($refs, $co{'id'});
5267
5268                 git_header_html(undef, $expires);
5269                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5270                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5271                 git_print_authorship(\%co);
5272                 print "<div class=\"page_body\">\n";
5273                 if (@{$co{'comment'}} > 1) {
5274                         print "<div class=\"log\">\n";
5275                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5276                         print "</div>\n"; # class="log"
5277                 }
5278
5279         } elsif ($format eq 'plain') {
5280                 my $refs = git_get_references("tags");
5281                 my $tagname = git_get_rev_name_tags($hash);
5282                 my $filename = basename($project) . "-$hash.patch";
5283
5284                 print $cgi->header(
5285                         -type => 'text/plain',
5286                         -charset => 'utf-8',
5287                         -expires => $expires,
5288                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5289                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5290                 print "From: " . to_utf8($co{'author'}) . "\n";
5291                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5292                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5293
5294                 print "X-Git-Tag: $tagname\n" if $tagname;
5295                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5296
5297                 foreach my $line (@{$co{'comment'}}) {
5298                         print to_utf8($line) . "\n";
5299                 }
5300                 print "---\n\n";
5301         }
5302
5303         # write patch
5304         if ($format eq 'html') {
5305                 my $use_parents = !defined $hash_parent ||
5306                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5307                 git_difftree_body(\@difftree, $hash,
5308                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5309                 print "<br/>\n";
5310
5311                 git_patchset_body($fd, \@difftree, $hash,
5312                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5313                 close $fd;
5314                 print "</div>\n"; # class="page_body"
5315                 git_footer_html();
5316
5317         } elsif ($format eq 'plain') {
5318                 local $/ = undef;
5319                 print <$fd>;
5320                 close $fd
5321                         or print "Reading git-diff-tree failed\n";
5322         }
5323 }
5324
5325 sub git_commitdiff_plain {
5326         git_commitdiff('plain');
5327 }
5328
5329 sub git_history {
5330         if (!defined $hash_base) {
5331                 $hash_base = git_get_head_hash($project);
5332         }
5333         if (!defined $page) {
5334                 $page = 0;
5335         }
5336         my $ftype;
5337         my %co = parse_commit($hash_base)
5338             or die_error(404, "Unknown commit object");
5339
5340         my $refs = git_get_references();
5341         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5342
5343         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5344                                        $file_name, "--full-history")
5345             or die_error(404, "No such file or directory on given branch");
5346
5347         if (!defined $hash && defined $file_name) {
5348                 # some commits could have deleted file in question,
5349                 # and not have it in tree, but one of them has to have it
5350                 for (my $i = 0; $i <= @commitlist; $i++) {
5351                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5352                         last if defined $hash;
5353                 }
5354         }
5355         if (defined $hash) {
5356                 $ftype = git_get_type($hash);
5357         }
5358         if (!defined $ftype) {
5359                 die_error(500, "Unknown type of object");
5360         }
5361
5362         my $paging_nav = '';
5363         if ($page > 0) {
5364                 $paging_nav .=
5365                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5366                                                file_name=>$file_name)},
5367                                 "first");
5368                 $paging_nav .= " &sdot; " .
5369                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5370                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5371         } else {
5372                 $paging_nav .= "first";
5373                 $paging_nav .= " &sdot; prev";
5374         }
5375         my $next_link = '';
5376         if ($#commitlist >= 100) {
5377                 $next_link =
5378                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5379                                  -accesskey => "n", -title => "Alt-n"}, "next");
5380                 $paging_nav .= " &sdot; $next_link";
5381         } else {
5382                 $paging_nav .= " &sdot; next";
5383         }
5384
5385         git_header_html();
5386         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5387         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5388         git_print_page_path($file_name, $ftype, $hash_base);
5389
5390         git_history_body(\@commitlist, 0, 99,
5391                          $refs, $hash_base, $ftype, $next_link);
5392
5393         git_footer_html();
5394 }
5395
5396 sub git_search {
5397         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5398         if (!defined $searchtext) {
5399                 die_error(400, "Text field is empty");
5400         }
5401         if (!defined $hash) {
5402                 $hash = git_get_head_hash($project);
5403         }
5404         my %co = parse_commit($hash);
5405         if (!%co) {
5406                 die_error(404, "Unknown commit object");
5407         }
5408         if (!defined $page) {
5409                 $page = 0;
5410         }
5411
5412         $searchtype ||= 'commit';
5413         if ($searchtype eq 'pickaxe') {
5414                 # pickaxe may take all resources of your box and run for several minutes
5415                 # with every query - so decide by yourself how public you make this feature
5416                 gitweb_check_feature('pickaxe')
5417                     or die_error(403, "Pickaxe is disabled");
5418         }
5419         if ($searchtype eq 'grep') {
5420                 gitweb_check_feature('grep')
5421                     or die_error(403, "Grep is disabled");
5422         }
5423
5424         git_header_html();
5425
5426         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5427                 my $greptype;
5428                 if ($searchtype eq 'commit') {
5429                         $greptype = "--grep=";
5430                 } elsif ($searchtype eq 'author') {
5431                         $greptype = "--author=";
5432                 } elsif ($searchtype eq 'committer') {
5433                         $greptype = "--committer=";
5434                 }
5435                 $greptype .= $searchtext;
5436                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5437                                                $greptype, '--regexp-ignore-case',
5438                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5439
5440                 my $paging_nav = '';
5441                 if ($page > 0) {
5442                         $paging_nav .=
5443                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5444                                                        searchtext=>$searchtext,
5445                                                        searchtype=>$searchtype)},
5446                                         "first");
5447                         $paging_nav .= " &sdot; " .
5448                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5449                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5450                 } else {
5451                         $paging_nav .= "first";
5452                         $paging_nav .= " &sdot; prev";
5453                 }
5454                 my $next_link = '';
5455                 if ($#commitlist >= 100) {
5456                         $next_link =
5457                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5458                                          -accesskey => "n", -title => "Alt-n"}, "next");
5459                         $paging_nav .= " &sdot; $next_link";
5460                 } else {
5461                         $paging_nav .= " &sdot; next";
5462                 }
5463
5464                 if ($#commitlist >= 100) {
5465                 }
5466
5467                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5468                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5469                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5470         }
5471
5472         if ($searchtype eq 'pickaxe') {
5473                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5474                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5475
5476                 print "<table class=\"pickaxe search\">\n";
5477                 my $alternate = 1;
5478                 $/ = "\n";
5479                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5480                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5481                         ($search_use_regexp ? '--pickaxe-regex' : ());
5482                 undef %co;
5483                 my @files;
5484                 while (my $line = <$fd>) {
5485                         chomp $line;
5486                         next unless $line;
5487
5488                         my %set = parse_difftree_raw_line($line);
5489                         if (defined $set{'commit'}) {
5490                                 # finish previous commit
5491                                 if (%co) {
5492                                         print "</td>\n" .
5493                                               "<td class=\"link\">" .
5494                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5495                                               " | " .
5496                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5497                                         print "</td>\n" .
5498                                               "</tr>\n";
5499                                 }
5500
5501                                 if ($alternate) {
5502                                         print "<tr class=\"dark\">\n";
5503                                 } else {
5504                                         print "<tr class=\"light\">\n";
5505                                 }
5506                                 $alternate ^= 1;
5507                                 %co = parse_commit($set{'commit'});
5508                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5509                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5510                                       "<td><i>$author</i></td>\n" .
5511                                       "<td>" .
5512                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5513                                               -class => "list subject"},
5514                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5515                         } elsif (defined $set{'to_id'}) {
5516                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5517
5518                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5519                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5520                                               -class => "list"},
5521                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5522                                       "<br/>\n";
5523                         }
5524                 }
5525                 close $fd;
5526
5527                 # finish last commit (warning: repetition!)
5528                 if (%co) {
5529                         print "</td>\n" .
5530                               "<td class=\"link\">" .
5531                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5532                               " | " .
5533                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5534                         print "</td>\n" .
5535                               "</tr>\n";
5536                 }
5537
5538                 print "</table>\n";
5539         }
5540
5541         if ($searchtype eq 'grep') {
5542                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5543                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5544
5545                 print "<table class=\"grep_search\">\n";
5546                 my $alternate = 1;
5547                 my $matches = 0;
5548                 $/ = "\n";
5549                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5550                         $search_use_regexp ? ('-E', '-i') : '-F',
5551                         $searchtext, $co{'tree'};
5552                 my $lastfile = '';
5553                 while (my $line = <$fd>) {
5554                         chomp $line;
5555                         my ($file, $lno, $ltext, $binary);
5556                         last if ($matches++ > 1000);
5557                         if ($line =~ /^Binary file (.+) matches$/) {
5558                                 $file = $1;
5559                                 $binary = 1;
5560                         } else {
5561                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5562                         }
5563                         if ($file ne $lastfile) {
5564                                 $lastfile and print "</td></tr>\n";
5565                                 if ($alternate++) {
5566                                         print "<tr class=\"dark\">\n";
5567                                 } else {
5568                                         print "<tr class=\"light\">\n";
5569                                 }
5570                                 print "<td class=\"list\">".
5571                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5572                                                                file_name=>"$file"),
5573                                                 -class => "list"}, esc_path($file));
5574                                 print "</td><td>\n";
5575                                 $lastfile = $file;
5576                         }
5577                         if ($binary) {
5578                                 print "<div class=\"binary\">Binary file</div>\n";
5579                         } else {
5580                                 $ltext = untabify($ltext);
5581                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5582                                         $ltext = esc_html($1, -nbsp=>1);
5583                                         $ltext .= '<span class="match">';
5584                                         $ltext .= esc_html($2, -nbsp=>1);
5585                                         $ltext .= '</span>';
5586                                         $ltext .= esc_html($3, -nbsp=>1);
5587                                 } else {
5588                                         $ltext = esc_html($ltext, -nbsp=>1);
5589                                 }
5590                                 print "<div class=\"pre\">" .
5591                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5592                                                                file_name=>"$file").'#l'.$lno,
5593                                                 -class => "linenr"}, sprintf('%4i', $lno))
5594                                         . ' ' .  $ltext . "</div>\n";
5595                         }
5596                 }
5597                 if ($lastfile) {
5598                         print "</td></tr>\n";
5599                         if ($matches > 1000) {
5600                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5601                         }
5602                 } else {
5603                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5604                 }
5605                 close $fd;
5606
5607                 print "</table>\n";
5608         }
5609         git_footer_html();
5610 }
5611
5612 sub git_search_help {
5613         git_header_html();
5614         git_print_page_nav('','', $hash,$hash,$hash);
5615         print <<EOT;
5616 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5617 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5618 the pattern entered is recognized as the POSIX extended
5619 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5620 insensitive).</p>
5621 <dl>
5622 <dt><b>commit</b></dt>
5623 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5624 EOT
5625         my ($have_grep) = gitweb_check_feature('grep');
5626         if ($have_grep) {
5627                 print <<EOT;
5628 <dt><b>grep</b></dt>
5629 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5630     a different one) are searched for the given pattern. On large trees, this search can take
5631 a while and put some strain on the server, so please use it with some consideration. Note that
5632 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5633 case-sensitive.</dd>
5634 EOT
5635         }
5636         print <<EOT;
5637 <dt><b>author</b></dt>
5638 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5639 <dt><b>committer</b></dt>
5640 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5641 EOT
5642         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5643         if ($have_pickaxe) {
5644                 print <<EOT;
5645 <dt><b>pickaxe</b></dt>
5646 <dd>All commits that caused the string to appear or disappear from any file (changes that
5647 added, removed or "modified" the string) will be listed. This search can take a while and
5648 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5649 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5650 EOT
5651         }
5652         print "</dl>\n";
5653         git_footer_html();
5654 }
5655
5656 sub git_shortlog {
5657         my $head = git_get_head_hash($project);
5658         if (!defined $hash) {
5659                 $hash = $head;
5660         }
5661         if (!defined $page) {
5662                 $page = 0;
5663         }
5664         my $refs = git_get_references();
5665
5666         my $commit_hash = $hash;
5667         if (defined $hash_parent) {
5668                 $commit_hash = "$hash_parent..$hash";
5669         }
5670         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5671
5672         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5673         my $next_link = '';
5674         if ($#commitlist >= 100) {
5675                 $next_link =
5676                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5677                                  -accesskey => "n", -title => "Alt-n"}, "next");
5678         }
5679
5680         git_header_html();
5681         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5682         git_print_header_div('summary', $project);
5683
5684         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5685
5686         git_footer_html();
5687 }
5688
5689 ## ......................................................................
5690 ## feeds (RSS, Atom; OPML)
5691
5692 sub git_feed {
5693         my $format = shift || 'atom';
5694         my ($have_blame) = gitweb_check_feature('blame');
5695
5696         # Atom: http://www.atomenabled.org/developers/syndication/
5697         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5698         if ($format ne 'rss' && $format ne 'atom') {
5699                 die_error(400, "Unknown web feed format");
5700         }
5701
5702         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5703         my $head = $hash || 'HEAD';
5704         my @commitlist = parse_commits($head, 150, 0, $file_name);
5705
5706         my %latest_commit;
5707         my %latest_date;
5708         my $content_type = "application/$format+xml";
5709         if (defined $cgi->http('HTTP_ACCEPT') &&
5710                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5711                 # browser (feed reader) prefers text/xml
5712                 $content_type = 'text/xml';
5713         }
5714         if (defined($commitlist[0])) {
5715                 %latest_commit = %{$commitlist[0]};
5716                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5717                 print $cgi->header(
5718                         -type => $content_type,
5719                         -charset => 'utf-8',
5720                         -last_modified => $latest_date{'rfc2822'});
5721         } else {
5722                 print $cgi->header(
5723                         -type => $content_type,
5724                         -charset => 'utf-8');
5725         }
5726
5727         # Optimization: skip generating the body if client asks only
5728         # for Last-Modified date.
5729         return if ($cgi->request_method() eq 'HEAD');
5730
5731         # header variables
5732         my $title = "$site_name - $project/$action";
5733         my $feed_type = 'log';
5734         if (defined $hash) {
5735                 $title .= " - '$hash'";
5736                 $feed_type = 'branch log';
5737                 if (defined $file_name) {
5738                         $title .= " :: $file_name";
5739                         $feed_type = 'history';
5740                 }
5741         } elsif (defined $file_name) {
5742                 $title .= " - $file_name";
5743                 $feed_type = 'history';
5744         }
5745         $title .= " $feed_type";
5746         my $descr = git_get_project_description($project);
5747         if (defined $descr) {
5748                 $descr = esc_html($descr);
5749         } else {
5750                 $descr = "$project " .
5751                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5752                          " feed";
5753         }
5754         my $owner = git_get_project_owner($project);
5755         $owner = esc_html($owner);
5756
5757         #header
5758         my $alt_url;
5759         if (defined $file_name) {
5760                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5761         } elsif (defined $hash) {
5762                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5763         } else {
5764                 $alt_url = href(-full=>1, action=>"summary");
5765         }
5766         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5767         if ($format eq 'rss') {
5768                 print <<XML;
5769 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5770 <channel>
5771 XML
5772                 print "<title>$title</title>\n" .
5773                       "<link>$alt_url</link>\n" .
5774                       "<description>$descr</description>\n" .
5775                       "<language>en</language>\n";
5776         } elsif ($format eq 'atom') {
5777                 print <<XML;
5778 <feed xmlns="http://www.w3.org/2005/Atom">
5779 XML
5780                 print "<title>$title</title>\n" .
5781                       "<subtitle>$descr</subtitle>\n" .
5782                       '<link rel="alternate" type="text/html" href="' .
5783                       $alt_url . '" />' . "\n" .
5784                       '<link rel="self" type="' . $content_type . '" href="' .
5785                       $cgi->self_url() . '" />' . "\n" .
5786                       "<id>" . href(-full=>1) . "</id>\n" .
5787                       # use project owner for feed author
5788                       "<author><name>$owner</name></author>\n";
5789                 if (defined $favicon) {
5790                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5791                 }
5792                 if (defined $logo_url) {
5793                         # not twice as wide as tall: 72 x 27 pixels
5794                         print "<logo>" . esc_url($logo) . "</logo>\n";
5795                 }
5796                 if (! %latest_date) {
5797                         # dummy date to keep the feed valid until commits trickle in:
5798                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5799                 } else {
5800                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5801                 }
5802         }
5803
5804         # contents
5805         for (my $i = 0; $i <= $#commitlist; $i++) {
5806                 my %co = %{$commitlist[$i]};
5807                 my $commit = $co{'id'};
5808                 # we read 150, we always show 30 and the ones more recent than 48 hours
5809                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5810                         last;
5811                 }
5812                 my %cd = parse_date($co{'author_epoch'});
5813
5814                 # get list of changed files
5815                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5816                         $co{'parent'} || "--root",
5817                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5818                         or next;
5819                 my @difftree = map { chomp; $_ } <$fd>;
5820                 close $fd
5821                         or next;
5822
5823                 # print element (entry, item)
5824                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5825                 if ($format eq 'rss') {
5826                         print "<item>\n" .
5827                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5828                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5829                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5830                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5831                               "<link>$co_url</link>\n" .
5832                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5833                               "<content:encoded>" .
5834                               "<![CDATA[\n";
5835                 } elsif ($format eq 'atom') {
5836                         print "<entry>\n" .
5837                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5838                               "<updated>$cd{'iso-8601'}</updated>\n" .
5839                               "<author>\n" .
5840                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5841                         if ($co{'author_email'}) {
5842                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5843                         }
5844                         print "</author>\n" .
5845                               # use committer for contributor
5846                               "<contributor>\n" .
5847                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5848                         if ($co{'committer_email'}) {
5849                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5850                         }
5851                         print "</contributor>\n" .
5852                               "<published>$cd{'iso-8601'}</published>\n" .
5853                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5854                               "<id>$co_url</id>\n" .
5855                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5856                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5857                 }
5858                 my $comment = $co{'comment'};
5859                 print "<pre>\n";
5860                 foreach my $line (@$comment) {
5861                         $line = esc_html($line);
5862                         print "$line\n";
5863                 }
5864                 print "</pre><ul>\n";
5865                 foreach my $difftree_line (@difftree) {
5866                         my %difftree = parse_difftree_raw_line($difftree_line);
5867                         next if !$difftree{'from_id'};
5868
5869                         my $file = $difftree{'file'} || $difftree{'to_file'};
5870
5871                         print "<li>" .
5872                               "[" .
5873                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5874                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5875                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5876                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5877                                       -title => "diff"}, 'D');
5878                         if ($have_blame) {
5879                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5880                                                              file_name=>$file, hash_base=>$commit),
5881                                               -title => "blame"}, 'B');
5882                         }
5883                         # if this is not a feed of a file history
5884                         if (!defined $file_name || $file_name ne $file) {
5885                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5886                                                              file_name=>$file, hash=>$commit),
5887                                               -title => "history"}, 'H');
5888                         }
5889                         $file = esc_path($file);
5890                         print "] ".
5891                               "$file</li>\n";
5892                 }
5893                 if ($format eq 'rss') {
5894                         print "</ul>]]>\n" .
5895                               "</content:encoded>\n" .
5896                               "</item>\n";
5897                 } elsif ($format eq 'atom') {
5898                         print "</ul>\n</div>\n" .
5899                               "</content>\n" .
5900                               "</entry>\n";
5901                 }
5902         }
5903
5904         # end of feed
5905         if ($format eq 'rss') {
5906                 print "</channel>\n</rss>\n";
5907         }       elsif ($format eq 'atom') {
5908                 print "</feed>\n";
5909         }
5910 }
5911
5912 sub git_rss {
5913         git_feed('rss');
5914 }
5915
5916 sub git_atom {
5917         git_feed('atom');
5918 }
5919
5920 sub git_opml {
5921         my @list = git_get_projects_list();
5922
5923         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5924         print <<XML;
5925 <?xml version="1.0" encoding="utf-8"?>
5926 <opml version="1.0">
5927 <head>
5928   <title>$site_name OPML Export</title>
5929 </head>
5930 <body>
5931 <outline text="git RSS feeds">
5932 XML
5933
5934         foreach my $pr (@list) {
5935                 my %proj = %$pr;
5936                 my $head = git_get_head_hash($proj{'path'});
5937                 if (!defined $head) {
5938                         next;
5939                 }
5940                 $git_dir = "$projectroot/$proj{'path'}";
5941                 my %co = parse_commit($head);
5942                 if (!%co) {
5943                         next;
5944                 }
5945
5946                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5947                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5948                 my $html = "$my_url?p=$proj{'path'};a=summary";
5949                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5950         }
5951         print <<XML;
5952 </outline>
5953 </body>
5954 </opml>
5955 XML
5956 }