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 # we make $path_info global because it's also used later on
  33 our $path_info = $ENV{"PATH_INFO"};
  34 if ($path_info) {
  35         $my_url =~ s,\Q$path_info\E$,,;
  36         $my_uri =~ s,\Q$path_info\E$,,;
  37 }
  38
  39 # core git executable to use
  40 # this can just be "git" if your webserver has a sensible PATH
  41 our $GIT = "++GIT_BINDIR++/git";
  42
  43 # absolute fs-path which will be prepended to the project path
  44 #our $projectroot = "/pub/scm";
  45 our $projectroot = "++GITWEB_PROJECTROOT++";
  46
  47 # fs traversing limit for getting project list
  48 # the number is relative to the projectroot
  49 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  50
  51 # target of the home link on top of all pages
  52 our $home_link = $my_uri || "/";
  53
  54 # string of the home link on top of all pages
  55 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  56
  57 # name of your site or organization to appear in page titles
  58 # replace this with something more descriptive for clearer bookmarks
  59 our $site_name = "++GITWEB_SITENAME++"
  60                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  61
  62 # filename of html text to include at top of each page
  63 our $site_header = "++GITWEB_SITE_HEADER++";
  64 # html text to include at home page
  65 our $home_text = "++GITWEB_HOMETEXT++";
  66 # filename of html text to include at bottom of each page
  67 our $site_footer = "++GITWEB_SITE_FOOTER++";
  68
  69 # URI of stylesheets
  70 our @stylesheets = ("++GITWEB_CSS++");
  71 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  72 our $stylesheet = undef;
  73 # URI of GIT logo (72x27 size)
  74 our $logo = "++GITWEB_LOGO++";
  75 # URI of GIT favicon, assumed to be image/png type
  76 our $favicon = "++GITWEB_FAVICON++";
  77
  78 # URI and label (title) of GIT logo link
  79 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  80 #our $logo_label = "git documentation";
  81 our $logo_url = "http://git.or.cz/";
  82 our $logo_label = "git homepage";
  83
  84 # source of projects list
  85 our $projects_list = "++GITWEB_LIST++";
  86
  87 # the width (in characters) of the projects list "Description" column
  88 our $projects_list_description_width = 25;
  89
  90 # default order of projects list
  91 # valid values are none, project, descr, owner, and age
  92 our $default_projects_order = "project";
  93
  94 # show repository only if this file exists
  95 # (only effective if this variable evaluates to true)
  96 our $export_ok = "++GITWEB_EXPORT_OK++";
  97
  98 # show repository only if this subroutine returns true
  99 # when given the path to the project, for example:
 100 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 101 our $export_auth_hook = undef;
 102
 103 # only allow viewing of repositories also shown on the overview page
 104 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 105
 106 # list of git base URLs used for URL to where fetch project from,
 107 # i.e. full URL is "$git_base_url/$project"
 108 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 109
 110 # default blob_plain mimetype and default charset for text/plain blob
 111 our $default_blob_plain_mimetype = 'text/plain';
 112 our $default_text_plain_charset  = undef;
 113
 114 # file to use for guessing MIME types before trying /etc/mime.types
 115 # (relative to the current git repository)
 116 our $mimetypes_file = undef;
 117
 118 # assume this charset if line contains non-UTF-8 characters;
 119 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 120 # for which encoding all byte sequences are valid, for example
 121 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 122 # could be even 'utf-8' for the old behavior)
 123 our $fallback_encoding = 'latin1';
 124
 125 # rename detection options for git-diff and git-diff-tree
 126 # - default is '-M', with the cost proportional to
 127 #   (number of removed files) * (number of new files).
 128 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 129 #   (number of changed files + number of removed files) * (number of new files)
 130 # - even more costly is '-C', '--find-copies-harder' with cost
 131 #   (number of files in the original tree) * (number of new files)
 132 # - one might want to include '-B' option, e.g. '-B', '-M'
 133 our @diff_opts = ('-M'); # taken from git_commit
 134
 135 # information about snapshot formats that gitweb is capable of serving
 136 our %known_snapshot_formats = (
 137         # name => {
 138         #       'display' => display name,
 139         #       'type' => mime type,
 140         #       'suffix' => filename suffix,
 141         #       'format' => --format for git-archive,
 142         #       'compressor' => [compressor command and arguments]
 143         #                       (array reference, optional)}
 144         #
 145         'tgz' => {
 146                 'display' => 'tar.gz',
 147                 'type' => 'application/x-gzip',
 148                 'suffix' => '.tar.gz',
 149                 'format' => 'tar',
 150                 'compressor' => ['gzip']},
 151
 152         'tbz2' => {
 153                 'display' => 'tar.bz2',
 154                 'type' => 'application/x-bzip2',
 155                 'suffix' => '.tar.bz2',
 156                 'format' => 'tar',
 157                 'compressor' => ['bzip2']},
 158
 159         'zip' => {
 160                 'display' => 'zip',
 161                 'type' => 'application/x-zip',
 162                 'suffix' => '.zip',
 163                 'format' => 'zip'},
 164 );
 165
 166 # Aliases so we understand old gitweb.snapshot values in repository
 167 # configuration.
 168 our %known_snapshot_format_aliases = (
 169         'gzip'  => 'tgz',
 170         'bzip2' => 'tbz2',
 171
 172         # backward compatibility: legacy gitweb config support
 173         'x-gzip' => undef, 'gz' => undef,
 174         'x-bzip2' => undef, 'bz2' => undef,
 175         'x-zip' => undef, '' => undef,
 176 );
 177
 178 # You define site-wide feature defaults here; override them with
 179 # $GITWEB_CONFIG as necessary.
 180 our %feature = (
 181         # feature => {
 182         #       'sub' => feature-sub (subroutine),
 183         #       'override' => allow-override (boolean),
 184         #       'default' => [ default options...] (array reference)}
 185         #
 186         # if feature is overridable (it means that allow-override has true value),
 187         # then feature-sub will be called with default options as parameters;
 188         # return value of feature-sub indicates if to enable specified feature
 189         #
 190         # if there is no 'sub' key (no feature-sub), then feature cannot be
 191         # overriden
 192         #
 193         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 194         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 195         # is enabled
 196
 197         # Enable the 'blame' blob view, showing the last commit that modified
 198         # each line in the file. This can be very CPU-intensive.
 199
 200         # To enable system wide have in $GITWEB_CONFIG
 201         # $feature{'blame'}{'default'} = [1];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'blame'}{'override'} = 1;
 204         # and in project config gitweb.blame = 0|1;
 205         'blame' => {
 206                 'sub' => \&feature_blame,
 207                 'override' => 0,
 208                 'default' => [0]},
 209
 210         # Enable the 'snapshot' link, providing a compressed archive of any
 211         # tree. This can potentially generate high traffic if you have large
 212         # project.
 213
 214         # Value is a list of formats defined in %known_snapshot_formats that
 215         # you wish to offer.
 216         # To disable system wide have in $GITWEB_CONFIG
 217         # $feature{'snapshot'}{'default'} = [];
 218         # To have project specific config enable override in $GITWEB_CONFIG
 219         # $feature{'snapshot'}{'override'} = 1;
 220         # and in project config, a comma-separated list of formats or "none"
 221         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 222         'snapshot' => {
 223                 'sub' => \&feature_snapshot,
 224                 'override' => 0,
 225                 'default' => ['tgz']},
 226
 227         # Enable text search, which will list the commits which match author,
 228         # committer or commit text to a given string.  Enabled by default.
 229         # Project specific override is not supported.
 230         'search' => {
 231                 'override' => 0,
 232                 'default' => [1]},
 233
 234         # Enable grep search, which will list the files in currently selected
 235         # tree containing the given string. Enabled by default. This can be
 236         # potentially CPU-intensive, of course.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'grep'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'grep'}{'override'} = 1;
 242         # and in project config gitweb.grep = 0|1;
 243         'grep' => {
 244                 'sub' => \&feature_grep,
 245                 'override' => 0,
 246                 'default' => [1]},
 247
 248         # Enable the pickaxe search, which will list the commits that modified
 249         # a given string in a file. This can be practical and quite faster
 250         # alternative to 'blame', but still potentially CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pickaxe'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'pickaxe'}{'override'} = 1;
 256         # and in project config gitweb.pickaxe = 0|1;
 257         'pickaxe' => {
 258                 'sub' => \&feature_pickaxe,
 259                 'override' => 0,
 260                 'default' => [1]},
 261
 262         # Make gitweb use an alternative format of the URLs which can be
 263         # more readable and natural-looking: project name is embedded
 264         # directly in the path and the query string contains other
 265         # auxiliary information. All gitweb installations recognize
 266         # URL in either format; this configures in which formats gitweb
 267         # generates links.
 268
 269         # To enable system wide have in $GITWEB_CONFIG
 270         # $feature{'pathinfo'}{'default'} = [1];
 271         # Project specific override is not supported.
 272
 273         # Note that you will need to change the default location of CSS,
 274         # favicon, logo and possibly other files to an absolute URL. Also,
 275         # if gitweb.cgi serves as your indexfile, you will need to force
 276         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 277         'pathinfo' => {
 278                 'override' => 0,
 279                 'default' => [0]},
 280
 281         # Make gitweb consider projects in project root subdirectories
 282         # to be forks of existing projects. Given project $projname.git,
 283         # projects matching $projname/*.git will not be shown in the main
 284         # projects list, instead a '+' mark will be added to $projname
 285         # there and a 'forks' view will be enabled for the project, listing
 286         # all the forks. If project list is taken from a file, forks have
 287         # to be listed after the main project.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'forks'}{'default'} = [1];
 291         # Project specific override is not supported.
 292         'forks' => {
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Insert custom links to the action bar of all project pages.
 297         # This enables you mainly to link to third-party scripts integrating
 298         # into gitweb; e.g. git-browser for graphical history representation
 299         # or custom web-based repository administration interface.
 300
 301         # The 'default' value consists of a list of triplets in the form
 302         # (label, link, position) where position is the label after which
 303         # to insert the link and link is a format string where %n expands
 304         # to the project name, %f to the project path within the filesystem,
 305         # %h to the current hash (h gitweb parameter) and %b to the current
 306         # hash base (hb gitweb parameter); %% expands to %.
 307
 308         # To enable system wide have in $GITWEB_CONFIG e.g.
 309         # $feature{'actions'}{'default'} = [('graphiclog',
 310         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 311         # Project specific override is not supported.
 312         'actions' => {
 313                 'override' => 0,
 314                 'default' => []},
 315
 316         # Allow gitweb scan project content tags described in ctags/
 317         # of project repository, and display the popular Web 2.0-ish
 318         # "tag cloud" near the project list. Note that this is something
 319         # COMPLETELY different from the normal Git tags.
 320
 321         # gitweb by itself can show existing tags, but it does not handle
 322         # tagging itself; you need an external application for that.
 323         # For an example script, check Girocco's cgi/tagproj.cgi.
 324         # You may want to install the HTML::TagCloud Perl module to get
 325         # a pretty tag cloud instead of just a list of tags.
 326
 327         # To enable system wide have in $GITWEB_CONFIG
 328         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 329         # Project specific override is not supported.
 330         'ctags' => {
 331                 'override' => 0,
 332                 'default' => [0]},
 333 );
 334
 335 sub gitweb_get_feature {
 336         my ($name) = @_;
 337         return unless exists $feature{$name};
 338         my ($sub, $override, @defaults) = (
 339                 $feature{$name}{'sub'},
 340                 $feature{$name}{'override'},
 341                 @{$feature{$name}{'default'}});
 342         if (!$override) { return @defaults; }
 343         if (!defined $sub) {
 344                 warn "feature $name is not overrideable";
 345                 return @defaults;
 346         }
 347         return $sub->(@defaults);
 348 }
 349
 350 # A wrapper to check if a given feature is enabled.
 351 # With this, you can say
 352 #
 353 #   my $bool_feat = gitweb_check_feature('bool_feat');
 354 #   gitweb_check_feature('bool_feat') or somecode;
 355 #
 356 # instead of
 357 #
 358 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 359 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 360 #
 361 sub gitweb_check_feature {
 362         return (gitweb_get_feature(@_))[0];
 363 }
 364
 365
 366 sub feature_blame {
 367         my ($val) = git_get_project_config('blame', '--bool');
 368
 369         if ($val eq 'true') {
 370                 return 1;
 371         } elsif ($val eq 'false') {
 372                 return 0;
 373         }
 374
 375         return $_[0];
 376 }
 377
 378 sub feature_snapshot {
 379         my (@fmts) = @_;
 380
 381         my ($val) = git_get_project_config('snapshot');
 382
 383         if ($val) {
 384                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 385         }
 386
 387         return @fmts;
 388 }
 389
 390 sub feature_grep {
 391         my ($val) = git_get_project_config('grep', '--bool');
 392
 393         if ($val eq 'true') {
 394                 return (1);
 395         } elsif ($val eq 'false') {
 396                 return (0);
 397         }
 398
 399         return ($_[0]);
 400 }
 401
 402 sub feature_pickaxe {
 403         my ($val) = git_get_project_config('pickaxe', '--bool');
 404
 405         if ($val eq 'true') {
 406                 return (1);
 407         } elsif ($val eq 'false') {
 408                 return (0);
 409         }
 410
 411         return ($_[0]);
 412 }
 413
 414 # checking HEAD file with -e is fragile if the repository was
 415 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 416 # and then pruned.
 417 sub check_head_link {
 418         my ($dir) = @_;
 419         my $headfile = "$dir/HEAD";
 420         return ((-e $headfile) ||
 421                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 422 }
 423
 424 sub check_export_ok {
 425         my ($dir) = @_;
 426         return (check_head_link($dir) &&
 427                 (!$export_ok || -e "$dir/$export_ok") &&
 428                 (!$export_auth_hook || $export_auth_hook->($dir)));
 429 }
 430
 431 # process alternate names for backward compatibility
 432 # filter out unsupported (unknown) snapshot formats
 433 sub filter_snapshot_fmts {
 434         my @fmts = @_;
 435
 436         @fmts = map {
 437                 exists $known_snapshot_format_aliases{$_} ?
 438                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 439         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 440
 441 }
 442
 443 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 444 if (-e $GITWEB_CONFIG) {
 445         do $GITWEB_CONFIG;
 446 } else {
 447         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 448         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 449 }
 450
 451 # version of the core git binary
 452 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 453
 454 $projects_list ||= $projectroot;
 455
 456 # ======================================================================
 457 # input validation and dispatch
 458
 459 # input parameters can be collected from a variety of sources (presently, CGI
 460 # and PATH_INFO), so we define an %input_params hash that collects them all
 461 # together during validation: this allows subsequent uses (e.g. href()) to be
 462 # agnostic of the parameter origin
 463
 464 our %input_params = ();
 465
 466 # input parameters are stored with the long parameter name as key. This will
 467 # also be used in the href subroutine to convert parameters to their CGI
 468 # equivalent, and since the href() usage is the most frequent one, we store
 469 # the name -> CGI key mapping here, instead of the reverse.
 470 #
 471 # XXX: Warning: If you touch this, check the search form for updating,
 472 # too.
 473
 474 our @cgi_param_mapping = (
 475         project => "p",
 476         action => "a",
 477         file_name => "f",
 478         file_parent => "fp",
 479         hash => "h",
 480         hash_parent => "hp",
 481         hash_base => "hb",
 482         hash_parent_base => "hpb",
 483         page => "pg",
 484         order => "o",
 485         searchtext => "s",
 486         searchtype => "st",
 487         snapshot_format => "sf",
 488         extra_options => "opt",
 489         search_use_regexp => "sr",
 490 );
 491 our %cgi_param_mapping = @cgi_param_mapping;
 492
 493 # we will also need to know the possible actions, for validation
 494 our %actions = (
 495         "blame" => \&git_blame,
 496         "blobdiff" => \&git_blobdiff,
 497         "blobdiff_plain" => \&git_blobdiff_plain,
 498         "blob" => \&git_blob,
 499         "blob_plain" => \&git_blob_plain,
 500         "commitdiff" => \&git_commitdiff,
 501         "commitdiff_plain" => \&git_commitdiff_plain,
 502         "commit" => \&git_commit,
 503         "forks" => \&git_forks,
 504         "heads" => \&git_heads,
 505         "history" => \&git_history,
 506         "log" => \&git_log,
 507         "rss" => \&git_rss,
 508         "atom" => \&git_atom,
 509         "search" => \&git_search,
 510         "search_help" => \&git_search_help,
 511         "shortlog" => \&git_shortlog,
 512         "summary" => \&git_summary,
 513         "tag" => \&git_tag,
 514         "tags" => \&git_tags,
 515         "tree" => \&git_tree,
 516         "snapshot" => \&git_snapshot,
 517         "object" => \&git_object,
 518         # those below don't need $project
 519         "opml" => \&git_opml,
 520         "project_list" => \&git_project_list,
 521         "project_index" => \&git_project_index,
 522 );
 523
 524 # finally, we have the hash of allowed extra_options for the commands that
 525 # allow them
 526 our %allowed_options = (
 527         "--no-merges" => [ qw(rss atom log shortlog history) ],
 528 );
 529
 530 # fill %input_params with the CGI parameters. All values except for 'opt'
 531 # should be single values, but opt can be an array. We should probably
 532 # build an array of parameters that can be multi-valued, but since for the time
 533 # being it's only this one, we just single it out
 534 while (my ($name, $symbol) = each %cgi_param_mapping) {
 535         if ($symbol eq 'opt') {
 536                 $input_params{$name} = [ $cgi->param($symbol) ];
 537         } else {
 538                 $input_params{$name} = $cgi->param($symbol);
 539         }
 540 }
 541
 542 # now read PATH_INFO and update the parameter list for missing parameters
 543 sub evaluate_path_info {
 544         return if defined $input_params{'project'};
 545         return if !$path_info;
 546         $path_info =~ s,^/+,,;
 547         return if !$path_info;
 548
 549         # find which part of PATH_INFO is project
 550         my $project = $path_info;
 551         $project =~ s,/+$,,;
 552         while ($project && !check_head_link("$projectroot/$project")) {
 553                 $project =~ s,/*[^/]*$,,;
 554         }
 555         return unless $project;
 556         $input_params{'project'} = $project;
 557
 558         # do not change any parameters if an action is given using the query string
 559         return if $input_params{'action'};
 560         $path_info =~ s,^\Q$project\E/*,,;
 561
 562         # next, check if we have an action
 563         my $action = $path_info;
 564         $action =~ s,/.*$,,;
 565         if (exists $actions{$action}) {
 566                 $path_info =~ s,^$action/*,,;
 567                 $input_params{'action'} = $action;
 568         }
 569
 570         # list of actions that want hash_base instead of hash, but can have no
 571         # pathname (f) parameter
 572         my @wants_base = (
 573                 'tree',
 574                 'history',
 575         );
 576
 577         # we want to catch
 578         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 579         my ($parentrefname, $parentpathname, $refname, $pathname) =
 580                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 581
 582         # first, analyze the 'current' part
 583         if (defined $pathname) {
 584                 # we got "branch:filename" or "branch:dir/"
 585                 # we could use git_get_type(branch:pathname), but:
 586                 # - it needs $git_dir
 587                 # - it does a git() call
 588                 # - the convention of terminating directories with a slash
 589                 #   makes it superfluous
 590                 # - embedding the action in the PATH_INFO would make it even
 591                 #   more superfluous
 592                 $pathname =~ s,^/+,,;
 593                 if (!$pathname || substr($pathname, -1) eq "/") {
 594                         $input_params{'action'} ||= "tree";
 595                         $pathname =~ s,/$,,;
 596                 } else {
 597                         # the default action depends on whether we had parent info
 598                         # or not
 599                         if ($parentrefname) {
 600                                 $input_params{'action'} ||= "blobdiff_plain";
 601                         } else {
 602                                 $input_params{'action'} ||= "blob_plain";
 603                         }
 604                 }
 605                 $input_params{'hash_base'} ||= $refname;
 606                 $input_params{'file_name'} ||= $pathname;
 607         } elsif (defined $refname) {
 608                 # we got "branch". In this case we have to choose if we have to
 609                 # set hash or hash_base.
 610                 #
 611                 # Most of the actions without a pathname only want hash to be
 612                 # set, except for the ones specified in @wants_base that want
 613                 # hash_base instead. It should also be noted that hand-crafted
 614                 # links having 'history' as an action and no pathname or hash
 615                 # set will fail, but that happens regardless of PATH_INFO.
 616                 $input_params{'action'} ||= "shortlog";
 617                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 618                         $input_params{'hash_base'} ||= $refname;
 619                 } else {
 620                         $input_params{'hash'} ||= $refname;
 621                 }
 622         }
 623
 624         # next, handle the 'parent' part, if present
 625         if (defined $parentrefname) {
 626                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 627                 # someproject/blobdiff/oldrev..newrev:/filename
 628                 if ($parentpathname) {
 629                         $parentpathname =~ s,^/+,,;
 630                         $parentpathname =~ s,/$,,;
 631                         $input_params{'file_parent'} ||= $parentpathname;
 632                 } else {
 633                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 634                 }
 635                 # we assume that hash_parent_base is wanted if a path was specified,
 636                 # or if the action wants hash_base instead of hash
 637                 if (defined $input_params{'file_parent'} ||
 638                         grep { $_ eq $input_params{'action'} } @wants_base) {
 639                         $input_params{'hash_parent_base'} ||= $parentrefname;
 640                 } else {
 641                         $input_params{'hash_parent'} ||= $parentrefname;
 642                 }
 643         }
 644
 645         # for the snapshot action, we allow URLs in the form
 646         # $project/snapshot/$hash.ext
 647         # where .ext determines the snapshot and gets removed from the
 648         # passed $refname to provide the $hash.
 649         #
 650         # To be able to tell that $refname includes the format extension, we
 651         # require the following two conditions to be satisfied:
 652         # - the hash input parameter MUST have been set from the $refname part
 653         #   of the URL (i.e. they must be equal)
 654         # - the snapshot format MUST NOT have been defined already (e.g. from
 655         #   CGI parameter sf)
 656         # It's also useless to try any matching unless $refname has a dot,
 657         # so we check for that too
 658         if (defined $input_params{'action'} &&
 659                 $input_params{'action'} eq 'snapshot' &&
 660                 defined $refname && index($refname, '.') != -1 &&
 661                 $refname eq $input_params{'hash'} &&
 662                 !defined $input_params{'snapshot_format'}) {
 663                 # We loop over the known snapshot formats, checking for
 664                 # extensions. Allowed extensions are both the defined suffix
 665                 # (which includes the initial dot already) and the snapshot
 666                 # format key itself, with a prepended dot
 667                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 668                         my $hash = $refname;
 669                         my $sfx;
 670                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 671                         next unless $sfx = $1;
 672                         # a valid suffix was found, so set the snapshot format
 673                         # and reset the hash parameter
 674                         $input_params{'snapshot_format'} = $fmt;
 675                         $input_params{'hash'} = $hash;
 676                         # we also set the format suffix to the one requested
 677                         # in the URL: this way a request for e.g. .tgz returns
 678                         # a .tgz instead of a .tar.gz
 679                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 680                         last;
 681                 }
 682         }
 683 }
 684 evaluate_path_info();
 685
 686 our $action = $input_params{'action'};
 687 if (defined $action) {
 688         if (!validate_action($action)) {
 689                 die_error(400, "Invalid action parameter");
 690         }
 691 }
 692
 693 # parameters which are pathnames
 694 our $project = $input_params{'project'};
 695 if (defined $project) {
 696         if (!validate_project($project)) {
 697                 undef $project;
 698                 die_error(404, "No such project");
 699         }
 700 }
 701
 702 our $file_name = $input_params{'file_name'};
 703 if (defined $file_name) {
 704         if (!validate_pathname($file_name)) {
 705                 die_error(400, "Invalid file parameter");
 706         }
 707 }
 708
 709 our $file_parent = $input_params{'file_parent'};
 710 if (defined $file_parent) {
 711         if (!validate_pathname($file_parent)) {
 712                 die_error(400, "Invalid file parent parameter");
 713         }
 714 }
 715
 716 # parameters which are refnames
 717 our $hash = $input_params{'hash'};
 718 if (defined $hash) {
 719         if (!validate_refname($hash)) {
 720                 die_error(400, "Invalid hash parameter");
 721         }
 722 }
 723
 724 our $hash_parent = $input_params{'hash_parent'};
 725 if (defined $hash_parent) {
 726         if (!validate_refname($hash_parent)) {
 727                 die_error(400, "Invalid hash parent parameter");
 728         }
 729 }
 730
 731 our $hash_base = $input_params{'hash_base'};
 732 if (defined $hash_base) {
 733         if (!validate_refname($hash_base)) {
 734                 die_error(400, "Invalid hash base parameter");
 735         }
 736 }
 737
 738 our @extra_options = @{$input_params{'extra_options'}};
 739 # @extra_options is always defined, since it can only be (currently) set from
 740 # CGI, and $cgi->param() returns the empty array in array context if the param
 741 # is not set
 742 foreach my $opt (@extra_options) {
 743         if (not exists $allowed_options{$opt}) {
 744                 die_error(400, "Invalid option parameter");
 745         }
 746         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 747                 die_error(400, "Invalid option parameter for this action");
 748         }
 749 }
 750
 751 our $hash_parent_base = $input_params{'hash_parent_base'};
 752 if (defined $hash_parent_base) {
 753         if (!validate_refname($hash_parent_base)) {
 754                 die_error(400, "Invalid hash parent base parameter");
 755         }
 756 }
 757
 758 # other parameters
 759 our $page = $input_params{'page'};
 760 if (defined $page) {
 761         if ($page =~ m/[^0-9]/) {
 762                 die_error(400, "Invalid page parameter");
 763         }
 764 }
 765
 766 our $searchtype = $input_params{'searchtype'};
 767 if (defined $searchtype) {
 768         if ($searchtype =~ m/[^a-z]/) {
 769                 die_error(400, "Invalid searchtype parameter");
 770         }
 771 }
 772
 773 our $search_use_regexp = $input_params{'search_use_regexp'};
 774
 775 our $searchtext = $input_params{'searchtext'};
 776 our $search_regexp;
 777 if (defined $searchtext) {
 778         if (length($searchtext) < 2) {
 779                 die_error(403, "At least two characters are required for search parameter");
 780         }
 781         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 782 }
 783
 784 # path to the current git repository
 785 our $git_dir;
 786 $git_dir = "$projectroot/$project" if $project;
 787
 788 # list of supported snapshot formats
 789 our @snapshot_fmts = gitweb_get_feature('snapshot');
 790 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 791
 792 # dispatch
 793 if (!defined $action) {
 794         if (defined $hash) {
 795                 $action = git_get_type($hash);
 796         } elsif (defined $hash_base && defined $file_name) {
 797                 $action = git_get_type("$hash_base:$file_name");
 798         } elsif (defined $project) {
 799                 $action = 'summary';
 800         } else {
 801                 $action = 'project_list';
 802         }
 803 }
 804 if (!defined($actions{$action})) {
 805         die_error(400, "Unknown action");
 806 }
 807 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 808     !$project) {
 809         die_error(400, "Project needed");
 810 }
 811 $actions{$action}->();
 812 exit;
 813
 814 ## ======================================================================
 815 ## action links
 816
 817 sub href (%) {
 818         my %params = @_;
 819         # default is to use -absolute url() i.e. $my_uri
 820         my $href = $params{-full} ? $my_url : $my_uri;
 821
 822         $params{'project'} = $project unless exists $params{'project'};
 823
 824         if ($params{-replay}) {
 825                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 826                         if (!exists $params{$name}) {
 827                                 $params{$name} = $input_params{$name};
 828                         }
 829                 }
 830         }
 831
 832         my $use_pathinfo = gitweb_check_feature('pathinfo');
 833         if ($use_pathinfo) {
 834                 # try to put as many parameters as possible in PATH_INFO:
 835                 #   - project name
 836                 #   - action
 837                 #   - hash_parent or hash_parent_base:/file_parent
 838                 #   - hash or hash_base:/filename
 839                 #   - the snapshot_format as an appropriate suffix
 840
 841                 # When the script is the root DirectoryIndex for the domain,
 842                 # $href here would be something like http://gitweb.example.com/
 843                 # Thus, we strip any trailing / from $href, to spare us double
 844                 # slashes in the final URL
 845                 $href =~ s,/$,,;
 846
 847                 # Then add the project name, if present
 848                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 849                 delete $params{'project'};
 850
 851                 # since we destructively absorb parameters, we keep this
 852                 # boolean that remembers if we're handling a snapshot
 853                 my $is_snapshot = $params{'action'} eq 'snapshot';
 854
 855                 # Summary just uses the project path URL, any other action is
 856                 # added to the URL
 857                 if (defined $params{'action'}) {
 858                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 859                         delete $params{'action'};
 860                 }
 861
 862                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 863                 # stripping nonexistent or useless pieces
 864                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 865                         || $params{'hash_parent'} || $params{'hash'});
 866                 if (defined $params{'hash_base'}) {
 867                         if (defined $params{'hash_parent_base'}) {
 868                                 $href .= esc_url($params{'hash_parent_base'});
 869                                 # skip the file_parent if it's the same as the file_name
 870                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 871                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 872                                         $href .= ":/".esc_url($params{'file_parent'});
 873                                         delete $params{'file_parent'};
 874                                 }
 875                                 $href .= "..";
 876                                 delete $params{'hash_parent'};
 877                                 delete $params{'hash_parent_base'};
 878                         } elsif (defined $params{'hash_parent'}) {
 879                                 $href .= esc_url($params{'hash_parent'}). "..";
 880                                 delete $params{'hash_parent'};
 881                         }
 882
 883                         $href .= esc_url($params{'hash_base'});
 884                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 885                                 $href .= ":/".esc_url($params{'file_name'});
 886                                 delete $params{'file_name'};
 887                         }
 888                         delete $params{'hash'};
 889                         delete $params{'hash_base'};
 890                 } elsif (defined $params{'hash'}) {
 891                         $href .= esc_url($params{'hash'});
 892                         delete $params{'hash'};
 893                 }
 894
 895                 # If the action was a snapshot, we can absorb the
 896                 # snapshot_format parameter too
 897                 if ($is_snapshot) {
 898                         my $fmt = $params{'snapshot_format'};
 899                         # snapshot_format should always be defined when href()
 900                         # is called, but just in case some code forgets, we
 901                         # fall back to the default
 902                         $fmt ||= $snapshot_fmts[0];
 903                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 904                         delete $params{'snapshot_format'};
 905                 }
 906         }
 907
 908         # now encode the parameters explicitly
 909         my @result = ();
 910         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 911                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 912                 if (defined $params{$name}) {
 913                         if (ref($params{$name}) eq "ARRAY") {
 914                                 foreach my $par (@{$params{$name}}) {
 915                                         push @result, $symbol . "=" . esc_param($par);
 916                                 }
 917                         } else {
 918                                 push @result, $symbol . "=" . esc_param($params{$name});
 919                         }
 920                 }
 921         }
 922         $href .= "?" . join(';', @result) if scalar @result;
 923
 924         return $href;
 925 }
 926
 927
 928 ## ======================================================================
 929 ## validation, quoting/unquoting and escaping
 930
 931 sub validate_action {
 932         my $input = shift || return undef;
 933         return undef unless exists $actions{$input};
 934         return $input;
 935 }
 936
 937 sub validate_project {
 938         my $input = shift || return undef;
 939         if (!validate_pathname($input) ||
 940                 !(-d "$projectroot/$input") ||
 941                 !check_export_ok("$projectroot/$input") ||
 942                 ($strict_export && !project_in_list($input))) {
 943                 return undef;
 944         } else {
 945                 return $input;
 946         }
 947 }
 948
 949 sub validate_pathname {
 950         my $input = shift || return undef;
 951
 952         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 953         # at the beginning, at the end, and between slashes.
 954         # also this catches doubled slashes
 955         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 956                 return undef;
 957         }
 958         # no null characters
 959         if ($input =~ m!\0!) {
 960                 return undef;
 961         }
 962         return $input;
 963 }
 964
 965 sub validate_refname {
 966         my $input = shift || return undef;
 967
 968         # textual hashes are O.K.
 969         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 970                 return $input;
 971         }
 972         # it must be correct pathname
 973         $input = validate_pathname($input)
 974                 or return undef;
 975         # restrictions on ref name according to git-check-ref-format
 976         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 977                 return undef;
 978         }
 979         return $input;
 980 }
 981
 982 # decode sequences of octets in utf8 into Perl's internal form,
 983 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 984 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 985 sub to_utf8 {
 986         my $str = shift;
 987         if (utf8::valid($str)) {
 988                 utf8::decode($str);
 989                 return $str;
 990         } else {
 991                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 992         }
 993 }
 994
 995 # quote unsafe chars, but keep the slash, even when it's not
 996 # correct, but quoted slashes look too horrible in bookmarks
 997 sub esc_param {
 998         my $str = shift;
 999         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1000         $str =~ s/\+/%2B/g;
1001         $str =~ s/ /\+/g;
1002         return $str;
1003 }
1004
1005 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1006 sub esc_url {
1007         my $str = shift;
1008         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1009         $str =~ s/\+/%2B/g;
1010         $str =~ s/ /\+/g;
1011         return $str;
1012 }
1013
1014 # replace invalid utf8 character with SUBSTITUTION sequence
1015 sub esc_html ($;%) {
1016         my $str = shift;
1017         my %opts = @_;
1018
1019         $str = to_utf8($str);
1020         $str = $cgi->escapeHTML($str);
1021         if ($opts{'-nbsp'}) {
1022                 $str =~ s/ /&nbsp;/g;
1023         }
1024         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1025         return $str;
1026 }
1027
1028 # quote control characters and escape filename to HTML
1029 sub esc_path {
1030         my $str = shift;
1031         my %opts = @_;
1032
1033         $str = to_utf8($str);
1034         $str = $cgi->escapeHTML($str);
1035         if ($opts{'-nbsp'}) {
1036                 $str =~ s/ /&nbsp;/g;
1037         }
1038         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1039         return $str;
1040 }
1041
1042 # Make control characters "printable", using character escape codes (CEC)
1043 sub quot_cec {
1044         my $cntrl = shift;
1045         my %opts = @_;
1046         my %es = ( # character escape codes, aka escape sequences
1047                 "\t" => '\t',   # tab            (HT)
1048                 "\n" => '\n',   # line feed      (LF)
1049                 "\r" => '\r',   # carrige return (CR)
1050                 "\f" => '\f',   # form feed      (FF)
1051                 "\b" => '\b',   # backspace      (BS)
1052                 "\a" => '\a',   # alarm (bell)   (BEL)
1053                 "\e" => '\e',   # escape         (ESC)
1054                 "\013" => '\v', # vertical tab   (VT)
1055                 "\000" => '\0', # nul character  (NUL)
1056         );
1057         my $chr = ( (exists $es{$cntrl})
1058                     ? $es{$cntrl}
1059                     : sprintf('\%2x', ord($cntrl)) );
1060         if ($opts{-nohtml}) {
1061                 return $chr;
1062         } else {
1063                 return "<span class=\"cntrl\">$chr</span>";
1064         }
1065 }
1066
1067 # Alternatively use unicode control pictures codepoints,
1068 # Unicode "printable representation" (PR)
1069 sub quot_upr {
1070         my $cntrl = shift;
1071         my %opts = @_;
1072
1073         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1074         if ($opts{-nohtml}) {
1075                 return $chr;
1076         } else {
1077                 return "<span class=\"cntrl\">$chr</span>";
1078         }
1079 }
1080
1081 # git may return quoted and escaped filenames
1082 sub unquote {
1083         my $str = shift;
1084
1085         sub unq {
1086                 my $seq = shift;
1087                 my %es = ( # character escape codes, aka escape sequences
1088                         't' => "\t",   # tab            (HT, TAB)
1089                         'n' => "\n",   # newline        (NL)
1090                         'r' => "\r",   # return         (CR)
1091                         'f' => "\f",   # form feed      (FF)
1092                         'b' => "\b",   # backspace      (BS)
1093                         'a' => "\a",   # alarm (bell)   (BEL)
1094                         'e' => "\e",   # escape         (ESC)
1095                         'v' => "\013", # vertical tab   (VT)
1096                 );
1097
1098                 if ($seq =~ m/^[0-7]{1,3}$/) {
1099                         # octal char sequence
1100                         return chr(oct($seq));
1101                 } elsif (exists $es{$seq}) {
1102                         # C escape sequence, aka character escape code
1103                         return $es{$seq};
1104                 }
1105                 # quoted ordinary character
1106                 return $seq;
1107         }
1108
1109         if ($str =~ m/^"(.*)"$/) {
1110                 # needs unquoting
1111                 $str = $1;
1112                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1113         }
1114         return $str;
1115 }
1116
1117 # escape tabs (convert tabs to spaces)
1118 sub untabify {
1119         my $line = shift;
1120
1121         while ((my $pos = index($line, "\t")) != -1) {
1122                 if (my $count = (8 - ($pos % 8))) {
1123                         my $spaces = ' ' x $count;
1124                         $line =~ s/\t/$spaces/;
1125                 }
1126         }
1127
1128         return $line;
1129 }
1130
1131 sub project_in_list {
1132         my $project = shift;
1133         my @list = git_get_projects_list();
1134         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1135 }
1136
1137 ## ----------------------------------------------------------------------
1138 ## HTML aware string manipulation
1139
1140 # Try to chop given string on a word boundary between position
1141 # $len and $len+$add_len. If there is no word boundary there,
1142 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1143 # (marking chopped part) would be longer than given string.
1144 sub chop_str {
1145         my $str = shift;
1146         my $len = shift;
1147         my $add_len = shift || 10;
1148         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1149
1150         # Make sure perl knows it is utf8 encoded so we don't
1151         # cut in the middle of a utf8 multibyte char.
1152         $str = to_utf8($str);
1153
1154         # allow only $len chars, but don't cut a word if it would fit in $add_len
1155         # if it doesn't fit, cut it if it's still longer than the dots we would add
1156         # remove chopped character entities entirely
1157
1158         # when chopping in the middle, distribute $len into left and right part
1159         # return early if chopping wouldn't make string shorter
1160         if ($where eq 'center') {
1161                 return $str if ($len + 5 >= length($str)); # filler is length 5
1162                 $len = int($len/2);
1163         } else {
1164                 return $str if ($len + 4 >= length($str)); # filler is length 4
1165         }
1166
1167         # regexps: ending and beginning with word part up to $add_len
1168         my $endre = qr/.{$len}\w{0,$add_len}/;
1169         my $begre = qr/\w{0,$add_len}.{$len}/;
1170
1171         if ($where eq 'left') {
1172                 $str =~ m/^(.*?)($begre)$/;
1173                 my ($lead, $body) = ($1, $2);
1174                 if (length($lead) > 4) {
1175                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1176                         $lead = " ...";
1177                 }
1178                 return "$lead$body";
1179
1180         } elsif ($where eq 'center') {
1181                 $str =~ m/^($endre)(.*)$/;
1182                 my ($left, $str)  = ($1, $2);
1183                 $str =~ m/^(.*?)($begre)$/;
1184                 my ($mid, $right) = ($1, $2);
1185                 if (length($mid) > 5) {
1186                         $left  =~ s/&[^;]*$//;
1187                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1188                         $mid = " ... ";
1189                 }
1190                 return "$left$mid$right";
1191
1192         } else {
1193                 $str =~ m/^($endre)(.*)$/;
1194                 my $body = $1;
1195                 my $tail = $2;
1196                 if (length($tail) > 4) {
1197                         $body =~ s/&[^;]*$//;
1198                         $tail = "... ";
1199                 }
1200                 return "$body$tail";
1201         }
1202 }
1203
1204 # takes the same arguments as chop_str, but also wraps a <span> around the
1205 # result with a title attribute if it does get chopped. Additionally, the
1206 # string is HTML-escaped.
1207 sub chop_and_escape_str {
1208         my ($str) = @_;
1209
1210         my $chopped = chop_str(@_);
1211         if ($chopped eq $str) {
1212                 return esc_html($chopped);
1213         } else {
1214                 $str =~ s/([[:cntrl:]])/?/g;
1215                 return $cgi->span({-title=>$str}, esc_html($chopped));
1216         }
1217 }
1218
1219 ## ----------------------------------------------------------------------
1220 ## functions returning short strings
1221
1222 # CSS class for given age value (in seconds)
1223 sub age_class {
1224         my $age = shift;
1225
1226         if (!defined $age) {
1227                 return "noage";
1228         } elsif ($age < 60*60*2) {
1229                 return "age0";
1230         } elsif ($age < 60*60*24*2) {
1231                 return "age1";
1232         } else {
1233                 return "age2";
1234         }
1235 }
1236
1237 # convert age in seconds to "nn units ago" string
1238 sub age_string {
1239         my $age = shift;
1240         my $age_str;
1241
1242         if ($age > 60*60*24*365*2) {
1243                 $age_str = (int $age/60/60/24/365);
1244                 $age_str .= " years ago";
1245         } elsif ($age > 60*60*24*(365/12)*2) {
1246                 $age_str = int $age/60/60/24/(365/12);
1247                 $age_str .= " months ago";
1248         } elsif ($age > 60*60*24*7*2) {
1249                 $age_str = int $age/60/60/24/7;
1250                 $age_str .= " weeks ago";
1251         } elsif ($age > 60*60*24*2) {
1252                 $age_str = int $age/60/60/24;
1253                 $age_str .= " days ago";
1254         } elsif ($age > 60*60*2) {
1255                 $age_str = int $age/60/60;
1256                 $age_str .= " hours ago";
1257         } elsif ($age > 60*2) {
1258                 $age_str = int $age/60;
1259                 $age_str .= " min ago";
1260         } elsif ($age > 2) {
1261                 $age_str = int $age;
1262                 $age_str .= " sec ago";
1263         } else {
1264                 $age_str .= " right now";
1265         }
1266         return $age_str;
1267 }
1268
1269 use constant {
1270         S_IFINVALID => 0030000,
1271         S_IFGITLINK => 0160000,
1272 };
1273
1274 # submodule/subproject, a commit object reference
1275 sub S_ISGITLINK($) {
1276         my $mode = shift;
1277
1278         return (($mode & S_IFMT) == S_IFGITLINK)
1279 }
1280
1281 # convert file mode in octal to symbolic file mode string
1282 sub mode_str {
1283         my $mode = oct shift;
1284
1285         if (S_ISGITLINK($mode)) {
1286                 return 'm---------';
1287         } elsif (S_ISDIR($mode & S_IFMT)) {
1288                 return 'drwxr-xr-x';
1289         } elsif (S_ISLNK($mode)) {
1290                 return 'lrwxrwxrwx';
1291         } elsif (S_ISREG($mode)) {
1292                 # git cares only about the executable bit
1293                 if ($mode & S_IXUSR) {
1294                         return '-rwxr-xr-x';
1295                 } else {
1296                         return '-rw-r--r--';
1297                 };
1298         } else {
1299                 return '----------';
1300         }
1301 }
1302
1303 # convert file mode in octal to file type string
1304 sub file_type {
1305         my $mode = shift;
1306
1307         if ($mode !~ m/^[0-7]+$/) {
1308                 return $mode;
1309         } else {
1310                 $mode = oct $mode;
1311         }
1312
1313         if (S_ISGITLINK($mode)) {
1314                 return "submodule";
1315         } elsif (S_ISDIR($mode & S_IFMT)) {
1316                 return "directory";
1317         } elsif (S_ISLNK($mode)) {
1318                 return "symlink";
1319         } elsif (S_ISREG($mode)) {
1320                 return "file";
1321         } else {
1322                 return "unknown";
1323         }
1324 }
1325
1326 # convert file mode in octal to file type description string
1327 sub file_type_long {
1328         my $mode = shift;
1329
1330         if ($mode !~ m/^[0-7]+$/) {
1331                 return $mode;
1332         } else {
1333                 $mode = oct $mode;
1334         }
1335
1336         if (S_ISGITLINK($mode)) {
1337                 return "submodule";
1338         } elsif (S_ISDIR($mode & S_IFMT)) {
1339                 return "directory";
1340         } elsif (S_ISLNK($mode)) {
1341                 return "symlink";
1342         } elsif (S_ISREG($mode)) {
1343                 if ($mode & S_IXUSR) {
1344                         return "executable";
1345                 } else {
1346                         return "file";
1347                 };
1348         } else {
1349                 return "unknown";
1350         }
1351 }
1352
1353
1354 ## ----------------------------------------------------------------------
1355 ## functions returning short HTML fragments, or transforming HTML fragments
1356 ## which don't belong to other sections
1357
1358 # format line of commit message.
1359 sub format_log_line_html {
1360         my $line = shift;
1361
1362         $line = esc_html($line, -nbsp=>1);
1363         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1364                 my $hash_text = $1;
1365                 my $link =
1366                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1367                                 -class => "text"}, $hash_text);
1368                 $line =~ s/$hash_text/$link/;
1369         }
1370         return $line;
1371 }
1372
1373 # format marker of refs pointing to given object
1374
1375 # the destination action is chosen based on object type and current context:
1376 # - for annotated tags, we choose the tag view unless it's the current view
1377 #   already, in which case we go to shortlog view
1378 # - for other refs, we keep the current view if we're in history, shortlog or
1379 #   log view, and select shortlog otherwise
1380 sub format_ref_marker {
1381         my ($refs, $id) = @_;
1382         my $markers = '';
1383
1384         if (defined $refs->{$id}) {
1385                 foreach my $ref (@{$refs->{$id}}) {
1386                         # this code exploits the fact that non-lightweight tags are the
1387                         # only indirect objects, and that they are the only objects for which
1388                         # we want to use tag instead of shortlog as action
1389                         my ($type, $name) = qw();
1390                         my $indirect = ($ref =~ s/\^\{\}$//);
1391                         # e.g. tags/v2.6.11 or heads/next
1392                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1393                                 $type = $1;
1394                                 $name = $2;
1395                         } else {
1396                                 $type = "ref";
1397                                 $name = $ref;
1398                         }
1399
1400                         my $class = $type;
1401                         $class .= " indirect" if $indirect;
1402
1403                         my $dest_action = "shortlog";
1404
1405                         if ($indirect) {
1406                                 $dest_action = "tag" unless $action eq "tag";
1407                         } elsif ($action =~ /^(history|(short)?log)$/) {
1408                                 $dest_action = $action;
1409                         }
1410
1411                         my $dest = "";
1412                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1413                         $dest .= $ref;
1414
1415                         my $link = $cgi->a({
1416                                 -href => href(
1417                                         action=>$dest_action,
1418                                         hash=>$dest
1419                                 )}, $name);
1420
1421                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1422                                 $link . "</span>";
1423                 }
1424         }
1425
1426         if ($markers) {
1427                 return ' <span class="refs">'. $markers . '</span>';
1428         } else {
1429                 return "";
1430         }
1431 }
1432
1433 # format, perhaps shortened and with markers, title line
1434 sub format_subject_html {
1435         my ($long, $short, $href, $extra) = @_;
1436         $extra = '' unless defined($extra);
1437
1438         if (length($short) < length($long)) {
1439                 return $cgi->a({-href => $href, -class => "list subject",
1440                                 -title => to_utf8($long)},
1441                        esc_html($short) . $extra);
1442         } else {
1443                 return $cgi->a({-href => $href, -class => "list subject"},
1444                        esc_html($long)  . $extra);
1445         }
1446 }
1447
1448 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1449 sub format_git_diff_header_line {
1450         my $line = shift;
1451         my $diffinfo = shift;
1452         my ($from, $to) = @_;
1453
1454         if ($diffinfo->{'nparents'}) {
1455                 # combined diff
1456                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1457                 if ($to->{'href'}) {
1458                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1459                                          esc_path($to->{'file'}));
1460                 } else { # file was deleted (no href)
1461                         $line .= esc_path($to->{'file'});
1462                 }
1463         } else {
1464                 # "ordinary" diff
1465                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1466                 if ($from->{'href'}) {
1467                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1468                                          'a/' . esc_path($from->{'file'}));
1469                 } else { # file was added (no href)
1470                         $line .= 'a/' . esc_path($from->{'file'});
1471                 }
1472                 $line .= ' ';
1473                 if ($to->{'href'}) {
1474                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1475                                          'b/' . esc_path($to->{'file'}));
1476                 } else { # file was deleted
1477                         $line .= 'b/' . esc_path($to->{'file'});
1478                 }
1479         }
1480
1481         return "<div class=\"diff header\">$line</div>\n";
1482 }
1483
1484 # format extended diff header line, before patch itself
1485 sub format_extended_diff_header_line {
1486         my $line = shift;
1487         my $diffinfo = shift;
1488         my ($from, $to) = @_;
1489
1490         # match <path>
1491         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1492                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1493                                        esc_path($from->{'file'}));
1494         }
1495         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1496                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1497                                  esc_path($to->{'file'}));
1498         }
1499         # match single <mode>
1500         if ($line =~ m/\s(\d{6})$/) {
1501                 $line .= '<span class="info"> (' .
1502                          file_type_long($1) .
1503                          ')</span>';
1504         }
1505         # match <hash>
1506         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1507                 # can match only for combined diff
1508                 $line = 'index ';
1509                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1510                         if ($from->{'href'}[$i]) {
1511                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1512                                                   -class=>"hash"},
1513                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1514                         } else {
1515                                 $line .= '0' x 7;
1516                         }
1517                         # separator
1518                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1519                 }
1520                 $line .= '..';
1521                 if ($to->{'href'}) {
1522                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1523                                          substr($diffinfo->{'to_id'},0,7));
1524                 } else {
1525                         $line .= '0' x 7;
1526                 }
1527
1528         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1529                 # can match only for ordinary diff
1530                 my ($from_link, $to_link);
1531                 if ($from->{'href'}) {
1532                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1533                                              substr($diffinfo->{'from_id'},0,7));
1534                 } else {
1535                         $from_link = '0' x 7;
1536                 }
1537                 if ($to->{'href'}) {
1538                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1539                                            substr($diffinfo->{'to_id'},0,7));
1540                 } else {
1541                         $to_link = '0' x 7;
1542                 }
1543                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1544                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1545         }
1546
1547         return $line . "<br/>\n";
1548 }
1549
1550 # format from-file/to-file diff header
1551 sub format_diff_from_to_header {
1552         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1553         my $line;
1554         my $result = '';
1555
1556         $line = $from_line;
1557         #assert($line =~ m/^---/) if DEBUG;
1558         # no extra formatting for "^--- /dev/null"
1559         if (! $diffinfo->{'nparents'}) {
1560                 # ordinary (single parent) diff
1561                 if ($line =~ m!^--- "?a/!) {
1562                         if ($from->{'href'}) {
1563                                 $line = '--- a/' .
1564                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1565                                                 esc_path($from->{'file'}));
1566                         } else {
1567                                 $line = '--- a/' .
1568                                         esc_path($from->{'file'});
1569                         }
1570                 }
1571                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1572
1573         } else {
1574                 # combined diff (merge commit)
1575                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1576                         if ($from->{'href'}[$i]) {
1577                                 $line = '--- ' .
1578                                         $cgi->a({-href=>href(action=>"blobdiff",
1579                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1580                                                              hash_parent_base=>$parents[$i],
1581                                                              file_parent=>$from->{'file'}[$i],
1582                                                              hash=>$diffinfo->{'to_id'},
1583                                                              hash_base=>$hash,
1584                                                              file_name=>$to->{'file'}),
1585                                                  -class=>"path",
1586                                                  -title=>"diff" . ($i+1)},
1587                                                 $i+1) .
1588                                         '/' .
1589                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1590                                                 esc_path($from->{'file'}[$i]));
1591                         } else {
1592                                 $line = '--- /dev/null';
1593                         }
1594                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1595                 }
1596         }
1597
1598         $line = $to_line;
1599         #assert($line =~ m/^\+\+\+/) if DEBUG;
1600         # no extra formatting for "^+++ /dev/null"
1601         if ($line =~ m!^\+\+\+ "?b/!) {
1602                 if ($to->{'href'}) {
1603                         $line = '+++ b/' .
1604                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1605                                         esc_path($to->{'file'}));
1606                 } else {
1607                         $line = '+++ b/' .
1608                                 esc_path($to->{'file'});
1609                 }
1610         }
1611         $result .= qq!<div class="diff to_file">$line</div>\n!;
1612
1613         return $result;
1614 }
1615
1616 # create note for patch simplified by combined diff
1617 sub format_diff_cc_simplified {
1618         my ($diffinfo, @parents) = @_;
1619         my $result = '';
1620
1621         $result .= "<div class=\"diff header\">" .
1622                    "diff --cc ";
1623         if (!is_deleted($diffinfo)) {
1624                 $result .= $cgi->a({-href => href(action=>"blob",
1625                                                   hash_base=>$hash,
1626                                                   hash=>$diffinfo->{'to_id'},
1627                                                   file_name=>$diffinfo->{'to_file'}),
1628                                     -class => "path"},
1629                                    esc_path($diffinfo->{'to_file'}));
1630         } else {
1631                 $result .= esc_path($diffinfo->{'to_file'});
1632         }
1633         $result .= "</div>\n" . # class="diff header"
1634                    "<div class=\"diff nodifferences\">" .
1635                    "Simple merge" .
1636                    "</div>\n"; # class="diff nodifferences"
1637
1638         return $result;
1639 }
1640
1641 # format patch (diff) line (not to be used for diff headers)
1642 sub format_diff_line {
1643         my $line = shift;
1644         my ($from, $to) = @_;
1645         my $diff_class = "";
1646
1647         chomp $line;
1648
1649         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1650                 # combined diff
1651                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1652                 if ($line =~ m/^\@{3}/) {
1653                         $diff_class = " chunk_header";
1654                 } elsif ($line =~ m/^\\/) {
1655                         $diff_class = " incomplete";
1656                 } elsif ($prefix =~ tr/+/+/) {
1657                         $diff_class = " add";
1658                 } elsif ($prefix =~ tr/-/-/) {
1659                         $diff_class = " rem";
1660                 }
1661         } else {
1662                 # assume ordinary diff
1663                 my $char = substr($line, 0, 1);
1664                 if ($char eq '+') {
1665                         $diff_class = " add";
1666                 } elsif ($char eq '-') {
1667                         $diff_class = " rem";
1668                 } elsif ($char eq '@') {
1669                         $diff_class = " chunk_header";
1670                 } elsif ($char eq "\\") {
1671                         $diff_class = " incomplete";
1672                 }
1673         }
1674         $line = untabify($line);
1675         if ($from && $to && $line =~ m/^\@{2} /) {
1676                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1677                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1678
1679                 $from_lines = 0 unless defined $from_lines;
1680                 $to_lines   = 0 unless defined $to_lines;
1681
1682                 if ($from->{'href'}) {
1683                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1684                                              -class=>"list"}, $from_text);
1685                 }
1686                 if ($to->{'href'}) {
1687                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1688                                              -class=>"list"}, $to_text);
1689                 }
1690                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1691                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1692                 return "<div class=\"diff$diff_class\">$line</div>\n";
1693         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1694                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1695                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1696
1697                 @from_text = split(' ', $ranges);
1698                 for (my $i = 0; $i < @from_text; ++$i) {
1699                         ($from_start[$i], $from_nlines[$i]) =
1700                                 (split(',', substr($from_text[$i], 1)), 0);
1701                 }
1702
1703                 $to_text   = pop @from_text;
1704                 $to_start  = pop @from_start;
1705                 $to_nlines = pop @from_nlines;
1706
1707                 $line = "<span class=\"chunk_info\">$prefix ";
1708                 for (my $i = 0; $i < @from_text; ++$i) {
1709                         if ($from->{'href'}[$i]) {
1710                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1711                                                   -class=>"list"}, $from_text[$i]);
1712                         } else {
1713                                 $line .= $from_text[$i];
1714                         }
1715                         $line .= " ";
1716                 }
1717                 if ($to->{'href'}) {
1718                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1719                                           -class=>"list"}, $to_text);
1720                 } else {
1721                         $line .= $to_text;
1722                 }
1723                 $line .= " $prefix</span>" .
1724                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1725                 return "<div class=\"diff$diff_class\">$line</div>\n";
1726         }
1727         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1728 }
1729
1730 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1731 # linked.  Pass the hash of the tree/commit to snapshot.
1732 sub format_snapshot_links {
1733         my ($hash) = @_;
1734         my $num_fmts = @snapshot_fmts;
1735         if ($num_fmts > 1) {
1736                 # A parenthesized list of links bearing format names.
1737                 # e.g. "snapshot (_tar.gz_ _zip_)"
1738                 return "snapshot (" . join(' ', map
1739                         $cgi->a({
1740                                 -href => href(
1741                                         action=>"snapshot",
1742                                         hash=>$hash,
1743                                         snapshot_format=>$_
1744                                 )
1745                         }, $known_snapshot_formats{$_}{'display'})
1746                 , @snapshot_fmts) . ")";
1747         } elsif ($num_fmts == 1) {
1748                 # A single "snapshot" link whose tooltip bears the format name.
1749                 # i.e. "_snapshot_"
1750                 my ($fmt) = @snapshot_fmts;
1751                 return
1752                         $cgi->a({
1753                                 -href => href(
1754                                         action=>"snapshot",
1755                                         hash=>$hash,
1756                                         snapshot_format=>$fmt
1757                                 ),
1758                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1759                         }, "snapshot");
1760         } else { # $num_fmts == 0
1761                 return undef;
1762         }
1763 }
1764
1765 ## ......................................................................
1766 ## functions returning values to be passed, perhaps after some
1767 ## transformation, to other functions; e.g. returning arguments to href()
1768
1769 # returns hash to be passed to href to generate gitweb URL
1770 # in -title key it returns description of link
1771 sub get_feed_info {
1772         my $format = shift || 'Atom';
1773         my %res = (action => lc($format));
1774
1775         # feed links are possible only for project views
1776         return unless (defined $project);
1777         # some views should link to OPML, or to generic project feed,
1778         # or don't have specific feed yet (so they should use generic)
1779         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1780
1781         my $branch;
1782         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1783         # from tag links; this also makes possible to detect branch links
1784         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1785             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1786                 $branch = $1;
1787         }
1788         # find log type for feed description (title)
1789         my $type = 'log';
1790         if (defined $file_name) {
1791                 $type  = "history of $file_name";
1792                 $type .= "/" if ($action eq 'tree');
1793                 $type .= " on '$branch'" if (defined $branch);
1794         } else {
1795                 $type = "log of $branch" if (defined $branch);
1796         }
1797
1798         $res{-title} = $type;
1799         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1800         $res{'file_name'} = $file_name;
1801
1802         return %res;
1803 }
1804
1805 ## ----------------------------------------------------------------------
1806 ## git utility subroutines, invoking git commands
1807
1808 # returns path to the core git executable and the --git-dir parameter as list
1809 sub git_cmd {
1810         return $GIT, '--git-dir='.$git_dir;
1811 }
1812
1813 # quote the given arguments for passing them to the shell
1814 # quote_command("command", "arg 1", "arg with ' and ! characters")
1815 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1816 # Try to avoid using this function wherever possible.
1817 sub quote_command {
1818         return join(' ',
1819                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1820 }
1821
1822 # get HEAD ref of given project as hash
1823 sub git_get_head_hash {
1824         my $project = shift;
1825         my $o_git_dir = $git_dir;
1826         my $retval = undef;
1827         $git_dir = "$projectroot/$project";
1828         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1829                 my $head = <$fd>;
1830                 close $fd;
1831                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1832                         $retval = $1;
1833                 }
1834         }
1835         if (defined $o_git_dir) {
1836                 $git_dir = $o_git_dir;
1837         }
1838         return $retval;
1839 }
1840
1841 # get type of given object
1842 sub git_get_type {
1843         my $hash = shift;
1844
1845         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1846         my $type = <$fd>;
1847         close $fd or return;
1848         chomp $type;
1849         return $type;
1850 }
1851
1852 # repository configuration
1853 our $config_file = '';
1854 our %config;
1855
1856 # store multiple values for single key as anonymous array reference
1857 # single values stored directly in the hash, not as [ <value> ]
1858 sub hash_set_multi {
1859         my ($hash, $key, $value) = @_;
1860
1861         if (!exists $hash->{$key}) {
1862                 $hash->{$key} = $value;
1863         } elsif (!ref $hash->{$key}) {
1864                 $hash->{$key} = [ $hash->{$key}, $value ];
1865         } else {
1866                 push @{$hash->{$key}}, $value;
1867         }
1868 }
1869
1870 # return hash of git project configuration
1871 # optionally limited to some section, e.g. 'gitweb'
1872 sub git_parse_project_config {
1873         my $section_regexp = shift;
1874         my %config;
1875
1876         local $/ = "\0";
1877
1878         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1879                 or return;
1880
1881         while (my $keyval = <$fh>) {
1882                 chomp $keyval;
1883                 my ($key, $value) = split(/\n/, $keyval, 2);
1884
1885                 hash_set_multi(\%config, $key, $value)
1886                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1887         }
1888         close $fh;
1889
1890         return %config;
1891 }
1892
1893 # convert config value to boolean, 'true' or 'false'
1894 # no value, number > 0, 'true' and 'yes' values are true
1895 # rest of values are treated as false (never as error)
1896 sub config_to_bool {
1897         my $val = shift;
1898
1899         # strip leading and trailing whitespace
1900         $val =~ s/^\s+//;
1901         $val =~ s/\s+$//;
1902
1903         return (!defined $val ||               # section.key
1904                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1905                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1906 }
1907
1908 # convert config value to simple decimal number
1909 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1910 # to be multiplied by 1024, 1048576, or 1073741824
1911 sub config_to_int {
1912         my $val = shift;
1913
1914         # strip leading and trailing whitespace
1915         $val =~ s/^\s+//;
1916         $val =~ s/\s+$//;
1917
1918         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1919                 $unit = lc($unit);
1920                 # unknown unit is treated as 1
1921                 return $num * ($unit eq 'g' ? 1073741824 :
1922                                $unit eq 'm' ?    1048576 :
1923                                $unit eq 'k' ?       1024 : 1);
1924         }
1925         return $val;
1926 }
1927
1928 # convert config value to array reference, if needed
1929 sub config_to_multi {
1930         my $val = shift;
1931
1932         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1933 }
1934
1935 sub git_get_project_config {
1936         my ($key, $type) = @_;
1937
1938         # key sanity check
1939         return unless ($key);
1940         $key =~ s/^gitweb\.//;
1941         return if ($key =~ m/\W/);
1942
1943         # type sanity check
1944         if (defined $type) {
1945                 $type =~ s/^--//;
1946                 $type = undef
1947                         unless ($type eq 'bool' || $type eq 'int');
1948         }
1949
1950         # get config
1951         if (!defined $config_file ||
1952             $config_file ne "$git_dir/config") {
1953                 %config = git_parse_project_config('gitweb');
1954                 $config_file = "$git_dir/config";
1955         }
1956
1957         # ensure given type
1958         if (!defined $type) {
1959                 return $config{"gitweb.$key"};
1960         } elsif ($type eq 'bool') {
1961                 # backward compatibility: 'git config --bool' returns true/false
1962                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1963         } elsif ($type eq 'int') {
1964                 return config_to_int($config{"gitweb.$key"});
1965         }
1966         return $config{"gitweb.$key"};
1967 }
1968
1969 # get hash of given path at given ref
1970 sub git_get_hash_by_path {
1971         my $base = shift;
1972         my $path = shift || return undef;
1973         my $type = shift;
1974
1975         $path =~ s,/+$,,;
1976
1977         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1978                 or die_error(500, "Open git-ls-tree failed");
1979         my $line = <$fd>;
1980         close $fd or return undef;
1981
1982         if (!defined $line) {
1983                 # there is no tree or hash given by $path at $base
1984                 return undef;
1985         }
1986
1987         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1988         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1989         if (defined $type && $type ne $2) {
1990                 # type doesn't match
1991                 return undef;
1992         }
1993         return $3;
1994 }
1995
1996 # get path of entry with given hash at given tree-ish (ref)
1997 # used to get 'from' filename for combined diff (merge commit) for renames
1998 sub git_get_path_by_hash {
1999         my $base = shift || return;
2000         my $hash = shift || return;
2001
2002         local $/ = "\0";
2003
2004         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2005                 or return undef;
2006         while (my $line = <$fd>) {
2007                 chomp $line;
2008
2009                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2010                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2011                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2012                         close $fd;
2013                         return $1;
2014                 }
2015         }
2016         close $fd;
2017         return undef;
2018 }
2019
2020 ## ......................................................................
2021 ## git utility functions, directly accessing git repository
2022
2023 sub git_get_project_description {
2024         my $path = shift;
2025
2026         $git_dir = "$projectroot/$path";
2027         open my $fd, "$git_dir/description"
2028                 or return git_get_project_config('description');
2029         my $descr = <$fd>;
2030         close $fd;
2031         if (defined $descr) {
2032                 chomp $descr;
2033         }
2034         return $descr;
2035 }
2036
2037 sub git_get_project_ctags {
2038         my $path = shift;
2039         my $ctags = {};
2040
2041         $git_dir = "$projectroot/$path";
2042         unless (opendir D, "$git_dir/ctags") {
2043                 return $ctags;
2044         }
2045         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2046                 open CT, $_ or next;
2047                 my $val = <CT>;
2048                 chomp $val;
2049                 close CT;
2050                 my $ctag = $_; $ctag =~ s#.*/##;
2051                 $ctags->{$ctag} = $val;
2052         }
2053         closedir D;
2054         $ctags;
2055 }
2056
2057 sub git_populate_project_tagcloud {
2058         my $ctags = shift;
2059
2060         # First, merge different-cased tags; tags vote on casing
2061         my %ctags_lc;
2062         foreach (keys %$ctags) {
2063                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2064                 if (not $ctags_lc{lc $_}->{topcount}
2065                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2066                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2067                         $ctags_lc{lc $_}->{topname} = $_;
2068                 }
2069         }
2070
2071         my $cloud;
2072         if (eval { require HTML::TagCloud; 1; }) {
2073                 $cloud = HTML::TagCloud->new;
2074                 foreach (sort keys %ctags_lc) {
2075                         # Pad the title with spaces so that the cloud looks
2076                         # less crammed.
2077                         my $title = $ctags_lc{$_}->{topname};
2078                         $title =~ s/ /&nbsp;/g;
2079                         $title =~ s/^/&nbsp;/g;
2080                         $title =~ s/$/&nbsp;/g;
2081                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2082                 }
2083         } else {
2084                 $cloud = \%ctags_lc;
2085         }
2086         $cloud;
2087 }
2088
2089 sub git_show_project_tagcloud {
2090         my ($cloud, $count) = @_;
2091         print STDERR ref($cloud)."..\n";
2092         if (ref $cloud eq 'HTML::TagCloud') {
2093                 return $cloud->html_and_css($count);
2094         } else {
2095                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2096                 return '<p align="center">' . join (', ', map {
2097                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2098                 } splice(@tags, 0, $count)) . '</p>';
2099         }
2100 }
2101
2102 sub git_get_project_url_list {
2103         my $path = shift;
2104
2105         $git_dir = "$projectroot/$path";
2106         open my $fd, "$git_dir/cloneurl"
2107                 or return wantarray ?
2108                 @{ config_to_multi(git_get_project_config('url')) } :
2109                    config_to_multi(git_get_project_config('url'));
2110         my @git_project_url_list = map { chomp; $_ } <$fd>;
2111         close $fd;
2112
2113         return wantarray ? @git_project_url_list : \@git_project_url_list;
2114 }
2115
2116 sub git_get_projects_list {
2117         my ($filter) = @_;
2118         my @list;
2119
2120         $filter ||= '';
2121         $filter =~ s/\.git$//;
2122
2123         my $check_forks = gitweb_check_feature('forks');
2124
2125         if (-d $projects_list) {
2126                 # search in directory
2127                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2128                 # remove the trailing "/"
2129                 $dir =~ s!/+$!!;
2130                 my $pfxlen = length("$dir");
2131                 my $pfxdepth = ($dir =~ tr!/!!);
2132
2133                 File::Find::find({
2134                         follow_fast => 1, # follow symbolic links
2135                         follow_skip => 2, # ignore duplicates
2136                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2137                         wanted => sub {
2138                                 # skip project-list toplevel, if we get it.
2139                                 return if (m!^[/.]$!);
2140                                 # only directories can be git repositories
2141                                 return unless (-d $_);
2142                                 # don't traverse too deep (Find is super slow on os x)
2143                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2144                                         $File::Find::prune = 1;
2145                                         return;
2146                                 }
2147
2148                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2149                                 # we check related file in $projectroot
2150                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
2151                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
2152                                         $File::Find::prune = 1;
2153                                 }
2154                         },
2155                 }, "$dir");
2156
2157         } elsif (-f $projects_list) {
2158                 # read from file(url-encoded):
2159                 # 'git%2Fgit.git Linus+Torvalds'
2160                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2161                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2162                 my %paths;
2163                 open my ($fd), $projects_list or return;
2164         PROJECT:
2165                 while (my $line = <$fd>) {
2166                         chomp $line;
2167                         my ($path, $owner) = split ' ', $line;
2168                         $path = unescape($path);
2169                         $owner = unescape($owner);
2170                         if (!defined $path) {
2171                                 next;
2172                         }
2173                         if ($filter ne '') {
2174                                 # looking for forks;
2175                                 my $pfx = substr($path, 0, length($filter));
2176                                 if ($pfx ne $filter) {
2177                                         next PROJECT;
2178                                 }
2179                                 my $sfx = substr($path, length($filter));
2180                                 if ($sfx !~ /^\/.*\.git$/) {
2181                                         next PROJECT;
2182                                 }
2183                         } elsif ($check_forks) {
2184                         PATH:
2185                                 foreach my $filter (keys %paths) {
2186                                         # looking for forks;
2187                                         my $pfx = substr($path, 0, length($filter));
2188                                         if ($pfx ne $filter) {
2189                                                 next PATH;
2190                                         }
2191                                         my $sfx = substr($path, length($filter));
2192                                         if ($sfx !~ /^\/.*\.git$/) {
2193                                                 next PATH;
2194                                         }
2195                                         # is a fork, don't include it in
2196                                         # the list
2197                                         next PROJECT;
2198                                 }
2199                         }
2200                         if (check_export_ok("$projectroot/$path")) {
2201                                 my $pr = {
2202                                         path => $path,
2203                                         owner => to_utf8($owner),
2204                                 };
2205                                 push @list, $pr;
2206                                 (my $forks_path = $path) =~ s/\.git$//;
2207                                 $paths{$forks_path}++;
2208                         }
2209                 }
2210                 close $fd;
2211         }
2212         return @list;
2213 }
2214
2215 our $gitweb_project_owner = undef;
2216 sub git_get_project_list_from_file {
2217
2218         return if (defined $gitweb_project_owner);
2219
2220         $gitweb_project_owner = {};
2221         # read from file (url-encoded):
2222         # 'git%2Fgit.git Linus+Torvalds'
2223         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2224         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2225         if (-f $projects_list) {
2226                 open (my $fd , $projects_list);
2227                 while (my $line = <$fd>) {
2228                         chomp $line;
2229                         my ($pr, $ow) = split ' ', $line;
2230                         $pr = unescape($pr);
2231                         $ow = unescape($ow);
2232                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2233                 }
2234                 close $fd;
2235         }
2236 }
2237
2238 sub git_get_project_owner {
2239         my $project = shift;
2240         my $owner;
2241
2242         return undef unless $project;
2243         $git_dir = "$projectroot/$project";
2244
2245         if (!defined $gitweb_project_owner) {
2246                 git_get_project_list_from_file();
2247         }
2248
2249         if (exists $gitweb_project_owner->{$project}) {
2250                 $owner = $gitweb_project_owner->{$project};
2251         }
2252         if (!defined $owner){
2253                 $owner = git_get_project_config('owner');
2254         }
2255         if (!defined $owner) {
2256                 $owner = get_file_owner("$git_dir");
2257         }
2258
2259         return $owner;
2260 }
2261
2262 sub git_get_last_activity {
2263         my ($path) = @_;
2264         my $fd;
2265
2266         $git_dir = "$projectroot/$path";
2267         open($fd, "-|", git_cmd(), 'for-each-ref',
2268              '--format=%(committer)',
2269              '--sort=-committerdate',
2270              '--count=1',
2271              'refs/heads') or return;
2272         my $most_recent = <$fd>;
2273         close $fd or return;
2274         if (defined $most_recent &&
2275             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2276                 my $timestamp = $1;
2277                 my $age = time - $timestamp;
2278                 return ($age, age_string($age));
2279         }
2280         return (undef, undef);
2281 }
2282
2283 sub git_get_references {
2284         my $type = shift || "";
2285         my %refs;
2286         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2287         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2288         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2289                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2290                 or return;
2291
2292         while (my $line = <$fd>) {
2293                 chomp $line;
2294                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2295                         if (defined $refs{$1}) {
2296                                 push @{$refs{$1}}, $2;
2297                         } else {
2298                                 $refs{$1} = [ $2 ];
2299                         }
2300                 }
2301         }
2302         close $fd or return;
2303         return \%refs;
2304 }
2305
2306 sub git_get_rev_name_tags {
2307         my $hash = shift || return undef;
2308
2309         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2310                 or return;
2311         my $name_rev = <$fd>;
2312         close $fd;
2313
2314         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2315                 return $1;
2316         } else {
2317                 # catches also '$hash undefined' output
2318                 return undef;
2319         }
2320 }
2321
2322 ## ----------------------------------------------------------------------
2323 ## parse to hash functions
2324
2325 sub parse_date {
2326         my $epoch = shift;
2327         my $tz = shift || "-0000";
2328
2329         my %date;
2330         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2331         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2332         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2333         $date{'hour'} = $hour;
2334         $date{'minute'} = $min;
2335         $date{'mday'} = $mday;
2336         $date{'day'} = $days[$wday];
2337         $date{'month'} = $months[$mon];
2338         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2339                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2340         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2341                              $mday, $months[$mon], $hour ,$min;
2342         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2343                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2344
2345         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2346         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2347         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2348         $date{'hour_local'} = $hour;
2349         $date{'minute_local'} = $min;
2350         $date{'tz_local'} = $tz;
2351         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2352                                   1900+$year, $mon+1, $mday,
2353                                   $hour, $min, $sec, $tz);
2354         return %date;
2355 }
2356
2357 sub parse_tag {
2358         my $tag_id = shift;
2359         my %tag;
2360         my @comment;
2361
2362         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2363         $tag{'id'} = $tag_id;
2364         while (my $line = <$fd>) {
2365                 chomp $line;
2366                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2367                         $tag{'object'} = $1;
2368                 } elsif ($line =~ m/^type (.+)$/) {
2369                         $tag{'type'} = $1;
2370                 } elsif ($line =~ m/^tag (.+)$/) {
2371                         $tag{'name'} = $1;
2372                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2373                         $tag{'author'} = $1;
2374                         $tag{'epoch'} = $2;
2375                         $tag{'tz'} = $3;
2376                 } elsif ($line =~ m/--BEGIN/) {
2377                         push @comment, $line;
2378                         last;
2379                 } elsif ($line eq "") {
2380                         last;
2381                 }
2382         }
2383         push @comment, <$fd>;
2384         $tag{'comment'} = \@comment;
2385         close $fd or return;
2386         if (!defined $tag{'name'}) {
2387                 return
2388         };
2389         return %tag
2390 }
2391
2392 sub parse_commit_text {
2393         my ($commit_text, $withparents) = @_;
2394         my @commit_lines = split '\n', $commit_text;
2395         my %co;
2396
2397         pop @commit_lines; # Remove '\0'
2398
2399         if (! @commit_lines) {
2400                 return;
2401         }
2402
2403         my $header = shift @commit_lines;
2404         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2405                 return;
2406         }
2407         ($co{'id'}, my @parents) = split ' ', $header;
2408         while (my $line = shift @commit_lines) {
2409                 last if $line eq "\n";
2410                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2411                         $co{'tree'} = $1;
2412                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2413                         push @parents, $1;
2414                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2415                         $co{'author'} = $1;
2416                         $co{'author_epoch'} = $2;
2417                         $co{'author_tz'} = $3;
2418                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2419                                 $co{'author_name'}  = $1;
2420                                 $co{'author_email'} = $2;
2421                         } else {
2422                                 $co{'author_name'} = $co{'author'};
2423                         }
2424                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2425                         $co{'committer'} = $1;
2426                         $co{'committer_epoch'} = $2;
2427                         $co{'committer_tz'} = $3;
2428                         $co{'committer_name'} = $co{'committer'};
2429                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2430                                 $co{'committer_name'}  = $1;
2431                                 $co{'committer_email'} = $2;
2432                         } else {
2433                                 $co{'committer_name'} = $co{'committer'};
2434                         }
2435                 }
2436         }
2437         if (!defined $co{'tree'}) {
2438                 return;
2439         };
2440         $co{'parents'} = \@parents;
2441         $co{'parent'} = $parents[0];
2442
2443         foreach my $title (@commit_lines) {
2444                 $title =~ s/^    //;
2445                 if ($title ne "") {
2446                         $co{'title'} = chop_str($title, 80, 5);
2447                         # remove leading stuff of merges to make the interesting part visible
2448                         if (length($title) > 50) {
2449                                 $title =~ s/^Automatic //;
2450                                 $title =~ s/^merge (of|with) /Merge ... /i;
2451                                 if (length($title) > 50) {
2452                                         $title =~ s/(http|rsync):\/\///;
2453                                 }
2454                                 if (length($title) > 50) {
2455                                         $title =~ s/(master|www|rsync)\.//;
2456                                 }
2457                                 if (length($title) > 50) {
2458                                         $title =~ s/kernel.org:?//;
2459                                 }
2460                                 if (length($title) > 50) {
2461                                         $title =~ s/\/pub\/scm//;
2462                                 }
2463                         }
2464                         $co{'title_short'} = chop_str($title, 50, 5);
2465                         last;
2466                 }
2467         }
2468         if (! defined $co{'title'} || $co{'title'} eq "") {
2469                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2470         }
2471         # remove added spaces
2472         foreach my $line (@commit_lines) {
2473                 $line =~ s/^    //;
2474         }
2475         $co{'comment'} = \@commit_lines;
2476
2477         my $age = time - $co{'committer_epoch'};
2478         $co{'age'} = $age;
2479         $co{'age_string'} = age_string($age);
2480         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2481         if ($age > 60*60*24*7*2) {
2482                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2483                 $co{'age_string_age'} = $co{'age_string'};
2484         } else {
2485                 $co{'age_string_date'} = $co{'age_string'};
2486                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2487         }
2488         return %co;
2489 }
2490
2491 sub parse_commit {
2492         my ($commit_id) = @_;
2493         my %co;
2494
2495         local $/ = "\0";
2496
2497         open my $fd, "-|", git_cmd(), "rev-list",
2498                 "--parents",
2499                 "--header",
2500                 "--max-count=1",
2501                 $commit_id,
2502                 "--",
2503                 or die_error(500, "Open git-rev-list failed");
2504         %co = parse_commit_text(<$fd>, 1);
2505         close $fd;
2506
2507         return %co;
2508 }
2509
2510 sub parse_commits {
2511         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2512         my @cos;
2513
2514         $maxcount ||= 1;
2515         $skip ||= 0;
2516
2517         local $/ = "\0";
2518
2519         open my $fd, "-|", git_cmd(), "rev-list",
2520                 "--header",
2521                 @args,
2522                 ("--max-count=" . $maxcount),
2523                 ("--skip=" . $skip),
2524                 @extra_options,
2525                 $commit_id,
2526                 "--",
2527                 ($filename ? ($filename) : ())
2528                 or die_error(500, "Open git-rev-list failed");
2529         while (my $line = <$fd>) {
2530                 my %co = parse_commit_text($line);
2531                 push @cos, \%co;
2532         }
2533         close $fd;
2534
2535         return wantarray ? @cos : \@cos;
2536 }
2537
2538 # parse line of git-diff-tree "raw" output
2539 sub parse_difftree_raw_line {
2540         my $line = shift;
2541         my %res;
2542
2543         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2544         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2545         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2546                 $res{'from_mode'} = $1;
2547                 $res{'to_mode'} = $2;
2548                 $res{'from_id'} = $3;
2549                 $res{'to_id'} = $4;
2550                 $res{'status'} = $5;
2551                 $res{'similarity'} = $6;
2552                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2553                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2554                 } else {
2555                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2556                 }
2557         }
2558         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2559         # combined diff (for merge commit)
2560         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2561                 $res{'nparents'}  = length($1);
2562                 $res{'from_mode'} = [ split(' ', $2) ];
2563                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2564                 $res{'from_id'} = [ split(' ', $3) ];
2565                 $res{'to_id'} = pop @{$res{'from_id'}};
2566                 $res{'status'} = [ split('', $4) ];
2567                 $res{'to_file'} = unquote($5);
2568         }
2569         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2570         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2571                 $res{'commit'} = $1;
2572         }
2573
2574         return wantarray ? %res : \%res;
2575 }
2576
2577 # wrapper: return parsed line of git-diff-tree "raw" output
2578 # (the argument might be raw line, or parsed info)
2579 sub parsed_difftree_line {
2580         my $line_or_ref = shift;
2581
2582         if (ref($line_or_ref) eq "HASH") {
2583                 # pre-parsed (or generated by hand)
2584                 return $line_or_ref;
2585         } else {
2586                 return parse_difftree_raw_line($line_or_ref);
2587         }
2588 }
2589
2590 # parse line of git-ls-tree output
2591 sub parse_ls_tree_line ($;%) {
2592         my $line = shift;
2593         my %opts = @_;
2594         my %res;
2595
2596         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2597         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2598
2599         $res{'mode'} = $1;
2600         $res{'type'} = $2;
2601         $res{'hash'} = $3;
2602         if ($opts{'-z'}) {
2603                 $res{'name'} = $4;
2604         } else {
2605                 $res{'name'} = unquote($4);
2606         }
2607
2608         return wantarray ? %res : \%res;
2609 }
2610
2611 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2612 sub parse_from_to_diffinfo {
2613         my ($diffinfo, $from, $to, @parents) = @_;
2614
2615         if ($diffinfo->{'nparents'}) {
2616                 # combined diff
2617                 $from->{'file'} = [];
2618                 $from->{'href'} = [];
2619                 fill_from_file_info($diffinfo, @parents)
2620                         unless exists $diffinfo->{'from_file'};
2621                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2622                         $from->{'file'}[$i] =
2623                                 defined $diffinfo->{'from_file'}[$i] ?
2624                                         $diffinfo->{'from_file'}[$i] :
2625                                         $diffinfo->{'to_file'};
2626                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2627                                 $from->{'href'}[$i] = href(action=>"blob",
2628                                                            hash_base=>$parents[$i],
2629                                                            hash=>$diffinfo->{'from_id'}[$i],
2630                                                            file_name=>$from->{'file'}[$i]);
2631                         } else {
2632                                 $from->{'href'}[$i] = undef;
2633                         }
2634                 }
2635         } else {
2636                 # ordinary (not combined) diff
2637                 $from->{'file'} = $diffinfo->{'from_file'};
2638                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2639                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2640                                                hash=>$diffinfo->{'from_id'},
2641                                                file_name=>$from->{'file'});
2642                 } else {
2643                         delete $from->{'href'};
2644                 }
2645         }
2646
2647         $to->{'file'} = $diffinfo->{'to_file'};
2648         if (!is_deleted($diffinfo)) { # file exists in result
2649                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2650                                      hash=>$diffinfo->{'to_id'},
2651                                      file_name=>$to->{'file'});
2652         } else {
2653                 delete $to->{'href'};
2654         }
2655 }
2656
2657 ## ......................................................................
2658 ## parse to array of hashes functions
2659
2660 sub git_get_heads_list {
2661         my $limit = shift;
2662         my @headslist;
2663
2664         open my $fd, '-|', git_cmd(), 'for-each-ref',
2665                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2666                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2667                 'refs/heads'
2668                 or return;
2669         while (my $line = <$fd>) {
2670                 my %ref_item;
2671
2672                 chomp $line;
2673                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2674                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2675                 my ($committer, $epoch, $tz) =
2676                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2677                 $ref_item{'fullname'}  = $name;
2678                 $name =~ s!^refs/heads/!!;
2679
2680                 $ref_item{'name'}  = $name;
2681                 $ref_item{'id'}    = $hash;
2682                 $ref_item{'title'} = $title || '(no commit message)';
2683                 $ref_item{'epoch'} = $epoch;
2684                 if ($epoch) {
2685                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2686                 } else {
2687                         $ref_item{'age'} = "unknown";
2688                 }
2689
2690                 push @headslist, \%ref_item;
2691         }
2692         close $fd;
2693
2694         return wantarray ? @headslist : \@headslist;
2695 }
2696
2697 sub git_get_tags_list {
2698         my $limit = shift;
2699         my @tagslist;
2700
2701         open my $fd, '-|', git_cmd(), 'for-each-ref',
2702                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2703                 '--format=%(objectname) %(objecttype) %(refname) '.
2704                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2705                 'refs/tags'
2706                 or return;
2707         while (my $line = <$fd>) {
2708                 my %ref_item;
2709
2710                 chomp $line;
2711                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2712                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2713                 my ($creator, $epoch, $tz) =
2714                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2715                 $ref_item{'fullname'} = $name;
2716                 $name =~ s!^refs/tags/!!;
2717
2718                 $ref_item{'type'} = $type;
2719                 $ref_item{'id'} = $id;
2720                 $ref_item{'name'} = $name;
2721                 if ($type eq "tag") {
2722                         $ref_item{'subject'} = $title;
2723                         $ref_item{'reftype'} = $reftype;
2724                         $ref_item{'refid'}   = $refid;
2725                 } else {
2726                         $ref_item{'reftype'} = $type;
2727                         $ref_item{'refid'}   = $id;
2728                 }
2729
2730                 if ($type eq "tag" || $type eq "commit") {
2731                         $ref_item{'epoch'} = $epoch;
2732                         if ($epoch) {
2733                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2734                         } else {
2735                                 $ref_item{'age'} = "unknown";
2736                         }
2737                 }
2738
2739                 push @tagslist, \%ref_item;
2740         }
2741         close $fd;
2742
2743         return wantarray ? @tagslist : \@tagslist;
2744 }
2745
2746 ## ----------------------------------------------------------------------
2747 ## filesystem-related functions
2748
2749 sub get_file_owner {
2750         my $path = shift;
2751
2752         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2753         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2754         if (!defined $gcos) {
2755                 return undef;
2756         }
2757         my $owner = $gcos;
2758         $owner =~ s/[,;].*$//;
2759         return to_utf8($owner);
2760 }
2761
2762 # assume that file exists
2763 sub insert_file {
2764         my $filename = shift;
2765
2766         open my $fd, '<', $filename;
2767         print map { to_utf8($_) } <$fd>;
2768         close $fd;
2769 }
2770
2771 ## ......................................................................
2772 ## mimetype related functions
2773
2774 sub mimetype_guess_file {
2775         my $filename = shift;
2776         my $mimemap = shift;
2777         -r $mimemap or return undef;
2778
2779         my %mimemap;
2780         open(MIME, $mimemap) or return undef;
2781         while (<MIME>) {
2782                 next if m/^#/; # skip comments
2783                 my ($mime, $exts) = split(/\t+/);
2784                 if (defined $exts) {
2785                         my @exts = split(/\s+/, $exts);
2786                         foreach my $ext (@exts) {
2787                                 $mimemap{$ext} = $mime;
2788                         }
2789                 }
2790         }
2791         close(MIME);
2792
2793         $filename =~ /\.([^.]*)$/;
2794         return $mimemap{$1};
2795 }
2796
2797 sub mimetype_guess {
2798         my $filename = shift;
2799         my $mime;
2800         $filename =~ /\./ or return undef;
2801
2802         if ($mimetypes_file) {
2803                 my $file = $mimetypes_file;
2804                 if ($file !~ m!^/!) { # if it is relative path
2805                         # it is relative to project
2806                         $file = "$projectroot/$project/$file";
2807                 }
2808                 $mime = mimetype_guess_file($filename, $file);
2809         }
2810         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2811         return $mime;
2812 }
2813
2814 sub blob_mimetype {
2815         my $fd = shift;
2816         my $filename = shift;
2817
2818         if ($filename) {
2819                 my $mime = mimetype_guess($filename);
2820                 $mime and return $mime;
2821         }
2822
2823         # just in case
2824         return $default_blob_plain_mimetype unless $fd;
2825
2826         if (-T $fd) {
2827                 return 'text/plain';
2828         } elsif (! $filename) {
2829                 return 'application/octet-stream';
2830         } elsif ($filename =~ m/\.png$/i) {
2831                 return 'image/png';
2832         } elsif ($filename =~ m/\.gif$/i) {
2833                 return 'image/gif';
2834         } elsif ($filename =~ m/\.jpe?g$/i) {
2835                 return 'image/jpeg';
2836         } else {
2837                 return 'application/octet-stream';
2838         }
2839 }
2840
2841 sub blob_contenttype {
2842         my ($fd, $file_name, $type) = @_;
2843
2844         $type ||= blob_mimetype($fd, $file_name);
2845         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2846                 $type .= "; charset=$default_text_plain_charset";
2847         }
2848
2849         return $type;
2850 }
2851
2852 ## ======================================================================
2853 ## functions printing HTML: header, footer, error page
2854
2855 sub git_header_html {
2856         my $status = shift || "200 OK";
2857         my $expires = shift;
2858
2859         my $title = "$site_name";
2860         if (defined $project) {
2861                 $title .= " - " . to_utf8($project);
2862                 if (defined $action) {
2863                         $title .= "/$action";
2864                         if (defined $file_name) {
2865                                 $title .= " - " . esc_path($file_name);
2866                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2867                                         $title .= "/";
2868                                 }
2869                         }
2870                 }
2871         }
2872         my $content_type;
2873         # require explicit support from the UA if we are to send the page as
2874         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2875         # we have to do this because MSIE sometimes globs '*/*', pretending to
2876         # support xhtml+xml but choking when it gets what it asked for.
2877         if (defined $cgi->http('HTTP_ACCEPT') &&
2878             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2879             $cgi->Accept('application/xhtml+xml') != 0) {
2880                 $content_type = 'application/xhtml+xml';
2881         } else {
2882                 $content_type = 'text/html';
2883         }
2884         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2885                            -status=> $status, -expires => $expires);
2886         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2887         print <<EOF;
2888 <?xml version="1.0" encoding="utf-8"?>
2889 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2890 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2891 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2892 <!-- git core binaries version $git_version -->
2893 <head>
2894 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2895 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2896 <meta name="robots" content="index, nofollow"/>
2897 <title>$title</title>
2898 EOF
2899 # print out each stylesheet that exist
2900         if (defined $stylesheet) {
2901 #provides backwards capability for those people who define style sheet in a config file
2902                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2903         } else {
2904                 foreach my $stylesheet (@stylesheets) {
2905                         next unless $stylesheet;
2906                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2907                 }
2908         }
2909         if (defined $project) {
2910                 my %href_params = get_feed_info();
2911                 if (!exists $href_params{'-title'}) {
2912                         $href_params{'-title'} = 'log';
2913                 }
2914
2915                 foreach my $format qw(RSS Atom) {
2916                         my $type = lc($format);
2917                         my %link_attr = (
2918                                 '-rel' => 'alternate',
2919                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2920                                 '-type' => "application/$type+xml"
2921                         );
2922
2923                         $href_params{'action'} = $type;
2924                         $link_attr{'-href'} = href(%href_params);
2925                         print "<link ".
2926                               "rel=\"$link_attr{'-rel'}\" ".
2927                               "title=\"$link_attr{'-title'}\" ".
2928                               "href=\"$link_attr{'-href'}\" ".
2929                               "type=\"$link_attr{'-type'}\" ".
2930                               "/>\n";
2931
2932                         $href_params{'extra_options'} = '--no-merges';
2933                         $link_attr{'-href'} = href(%href_params);
2934                         $link_attr{'-title'} .= ' (no merges)';
2935                         print "<link ".
2936                               "rel=\"$link_attr{'-rel'}\" ".
2937                               "title=\"$link_attr{'-title'}\" ".
2938                               "href=\"$link_attr{'-href'}\" ".
2939                               "type=\"$link_attr{'-type'}\" ".
2940                               "/>\n";
2941                 }
2942
2943         } else {
2944                 printf('<link rel="alternate" title="%s projects list" '.
2945                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2946                        $site_name, href(project=>undef, action=>"project_index"));
2947                 printf('<link rel="alternate" title="%s projects feeds" '.
2948                        'href="%s" type="text/x-opml" />'."\n",
2949                        $site_name, href(project=>undef, action=>"opml"));
2950         }
2951         if (defined $favicon) {
2952                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2953         }
2954
2955         print "</head>\n" .
2956               "<body>\n";
2957
2958         if (-f $site_header) {
2959                 insert_file($site_header);
2960         }
2961
2962         print "<div class=\"page_header\">\n" .
2963               $cgi->a({-href => esc_url($logo_url),
2964                        -title => $logo_label},
2965                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2966         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2967         if (defined $project) {
2968                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2969                 if (defined $action) {
2970                         print " / $action";
2971                 }
2972                 print "\n";
2973         }
2974         print "</div>\n";
2975
2976         my $have_search = gitweb_check_feature('search');
2977         if (defined $project && $have_search) {
2978                 if (!defined $searchtext) {
2979                         $searchtext = "";
2980                 }
2981                 my $search_hash;
2982                 if (defined $hash_base) {
2983                         $search_hash = $hash_base;
2984                 } elsif (defined $hash) {
2985                         $search_hash = $hash;
2986                 } else {
2987                         $search_hash = "HEAD";
2988                 }
2989                 my $action = $my_uri;
2990                 my $use_pathinfo = gitweb_check_feature('pathinfo');
2991                 if ($use_pathinfo) {
2992                         $action .= "/".esc_url($project);
2993                 }
2994                 print $cgi->startform(-method => "get", -action => $action) .
2995                       "<div class=\"search\">\n" .
2996                       (!$use_pathinfo &&
2997                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2998                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2999                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3000                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3001                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3002                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3003                       " search:\n",
3004                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3005                       "<span title=\"Extended regular expression\">" .
3006                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3007                                      -checked => $search_use_regexp) .
3008                       "</span>" .
3009                       "</div>" .
3010                       $cgi->end_form() . "\n";
3011         }
3012 }
3013
3014 sub git_footer_html {
3015         my $feed_class = 'rss_logo';
3016
3017         print "<div class=\"page_footer\">\n";
3018         if (defined $project) {
3019                 my $descr = git_get_project_description($project);
3020                 if (defined $descr) {
3021                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3022                 }
3023
3024                 my %href_params = get_feed_info();
3025                 if (!%href_params) {
3026                         $feed_class .= ' generic';
3027                 }
3028                 $href_params{'-title'} ||= 'log';
3029
3030                 foreach my $format qw(RSS Atom) {
3031                         $href_params{'action'} = lc($format);
3032                         print $cgi->a({-href => href(%href_params),
3033                                       -title => "$href_params{'-title'} $format feed",
3034                                       -class => $feed_class}, $format)."\n";
3035                 }
3036
3037         } else {
3038                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3039                               -class => $feed_class}, "OPML") . " ";
3040                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3041                               -class => $feed_class}, "TXT") . "\n";
3042         }
3043         print "</div>\n"; # class="page_footer"
3044
3045         if (-f $site_footer) {
3046                 insert_file($site_footer);
3047         }
3048
3049         print "</body>\n" .
3050               "</html>";
3051 }
3052
3053 # die_error(<http_status_code>, <error_message>)
3054 # Example: die_error(404, 'Hash not found')
3055 # By convention, use the following status codes (as defined in RFC 2616):
3056 # 400: Invalid or missing CGI parameters, or
3057 #      requested object exists but has wrong type.
3058 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3059 #      this server or project.
3060 # 404: Requested object/revision/project doesn't exist.
3061 # 500: The server isn't configured properly, or
3062 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3063 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3064 sub die_error {
3065         my $status = shift || 500;
3066         my $error = shift || "Internal server error";
3067
3068         my %http_responses = (400 => '400 Bad Request',
3069                               403 => '403 Forbidden',
3070                               404 => '404 Not Found',
3071                               500 => '500 Internal Server Error');
3072         git_header_html($http_responses{$status});
3073         print <<EOF;
3074 <div class="page_body">
3075 <br /><br />
3076 $status - $error
3077 <br />
3078 </div>
3079 EOF
3080         git_footer_html();
3081         exit;
3082 }
3083
3084 ## ----------------------------------------------------------------------
3085 ## functions printing or outputting HTML: navigation
3086
3087 sub git_print_page_nav {
3088         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3089         $extra = '' if !defined $extra; # pager or formats
3090
3091         my @navs = qw(summary shortlog log commit commitdiff tree);
3092         if ($suppress) {
3093                 @navs = grep { $_ ne $suppress } @navs;
3094         }
3095
3096         my %arg = map { $_ => {action=>$_} } @navs;
3097         if (defined $head) {
3098                 for (qw(commit commitdiff)) {
3099                         $arg{$_}{'hash'} = $head;
3100                 }
3101                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3102                         for (qw(shortlog log)) {
3103                                 $arg{$_}{'hash'} = $head;
3104                         }
3105                 }
3106         }
3107
3108         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3109         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3110
3111         my @actions = gitweb_get_feature('actions');
3112         my %repl = (
3113                 '%' => '%',
3114                 'n' => $project,         # project name
3115                 'f' => $git_dir,         # project path within filesystem
3116                 'h' => $treehead || '',  # current hash ('h' parameter)
3117                 'b' => $treebase || '',  # hash base ('hb' parameter)
3118         );
3119         while (@actions) {
3120                 my ($label, $link, $pos) = splice(@actions,0,3);
3121                 # insert
3122                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3123                 # munch munch
3124                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3125                 $arg{$label}{'_href'} = $link;
3126         }
3127
3128         print "<div class=\"page_nav\">\n" .
3129                 (join " | ",
3130                  map { $_ eq $current ?
3131                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3132                  } @navs);
3133         print "<br/>\n$extra<br/>\n" .
3134               "</div>\n";
3135 }
3136
3137 sub format_paging_nav {
3138         my ($action, $hash, $head, $page, $has_next_link) = @_;
3139         my $paging_nav;
3140
3141
3142         if ($hash ne $head || $page) {
3143                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3144         } else {
3145                 $paging_nav .= "HEAD";
3146         }
3147
3148         if ($page > 0) {
3149                 $paging_nav .= " &sdot; " .
3150                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3151                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3152         } else {
3153                 $paging_nav .= " &sdot; prev";
3154         }
3155
3156         if ($has_next_link) {
3157                 $paging_nav .= " &sdot; " .
3158                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3159                                  -accesskey => "n", -title => "Alt-n"}, "next");
3160         } else {
3161                 $paging_nav .= " &sdot; next";
3162         }
3163
3164         return $paging_nav;
3165 }
3166
3167 ## ......................................................................
3168 ## functions printing or outputting HTML: div
3169
3170 sub git_print_header_div {
3171         my ($action, $title, $hash, $hash_base) = @_;
3172         my %args = ();
3173
3174         $args{'action'} = $action;
3175         $args{'hash'} = $hash if $hash;
3176         $args{'hash_base'} = $hash_base if $hash_base;
3177
3178         print "<div class=\"header\">\n" .
3179               $cgi->a({-href => href(%args), -class => "title"},
3180               $title ? $title : $action) .
3181               "\n</div>\n";
3182 }
3183
3184 #sub git_print_authorship (\%) {
3185 sub git_print_authorship {
3186         my $co = shift;
3187
3188         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3189         print "<div class=\"author_date\">" .
3190               esc_html($co->{'author_name'}) .
3191               " [$ad{'rfc2822'}";
3192         if ($ad{'hour_local'} < 6) {
3193                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3194                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3195         } else {
3196                 printf(" (%02d:%02d %s)",
3197                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3198         }
3199         print "]</div>\n";
3200 }
3201
3202 sub git_print_page_path {
3203         my $name = shift;
3204         my $type = shift;
3205         my $hb = shift;
3206
3207
3208         print "<div class=\"page_path\">";
3209         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3210                       -title => 'tree root'}, to_utf8("[$project]"));
3211         print " / ";
3212         if (defined $name) {
3213                 my @dirname = split '/', $name;
3214                 my $basename = pop @dirname;
3215                 my $fullname = '';
3216
3217                 foreach my $dir (@dirname) {
3218                         $fullname .= ($fullname ? '/' : '') . $dir;
3219                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3220                                                      hash_base=>$hb),
3221                                       -title => $fullname}, esc_path($dir));
3222                         print " / ";
3223                 }
3224                 if (defined $type && $type eq 'blob') {
3225                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3226                                                      hash_base=>$hb),
3227                                       -title => $name}, esc_path($basename));
3228                 } elsif (defined $type && $type eq 'tree') {
3229                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3230                                                      hash_base=>$hb),
3231                                       -title => $name}, esc_path($basename));
3232                         print " / ";
3233                 } else {
3234                         print esc_path($basename);
3235                 }
3236         }
3237         print "<br/></div>\n";
3238 }
3239
3240 # sub git_print_log (\@;%) {
3241 sub git_print_log ($;%) {
3242         my $log = shift;
3243         my %opts = @_;
3244
3245         if ($opts{'-remove_title'}) {
3246                 # remove title, i.e. first line of log
3247                 shift @$log;
3248         }
3249         # remove leading empty lines
3250         while (defined $log->[0] && $log->[0] eq "") {
3251                 shift @$log;
3252         }
3253
3254         # print log
3255         my $signoff = 0;
3256         my $empty = 0;
3257         foreach my $line (@$log) {
3258                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3259                         $signoff = 1;
3260                         $empty = 0;
3261                         if (! $opts{'-remove_signoff'}) {
3262                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3263                                 next;
3264                         } else {
3265                                 # remove signoff lines
3266                                 next;
3267                         }
3268                 } else {
3269                         $signoff = 0;
3270                 }
3271
3272                 # print only one empty line
3273                 # do not print empty line after signoff
3274                 if ($line eq "") {
3275                         next if ($empty || $signoff);
3276                         $empty = 1;
3277                 } else {
3278                         $empty = 0;
3279                 }
3280
3281                 print format_log_line_html($line) . "<br/>\n";
3282         }
3283
3284         if ($opts{'-final_empty_line'}) {
3285                 # end with single empty line
3286                 print "<br/>\n" unless $empty;
3287         }
3288 }
3289
3290 # return link target (what link points to)
3291 sub git_get_link_target {
3292         my $hash = shift;
3293         my $link_target;
3294
3295         # read link
3296         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3297                 or return;
3298         {
3299                 local $/;
3300                 $link_target = <$fd>;
3301         }
3302         close $fd
3303                 or return;
3304
3305         return $link_target;
3306 }
3307
3308 # given link target, and the directory (basedir) the link is in,
3309 # return target of link relative to top directory (top tree);
3310 # return undef if it is not possible (including absolute links).
3311 sub normalize_link_target {
3312         my ($link_target, $basedir, $hash_base) = @_;
3313
3314         # we can normalize symlink target only if $hash_base is provided
3315         return unless $hash_base;
3316
3317         # absolute symlinks (beginning with '/') cannot be normalized
3318         return if (substr($link_target, 0, 1) eq '/');
3319
3320         # normalize link target to path from top (root) tree (dir)
3321         my $path;
3322         if ($basedir) {
3323                 $path = $basedir . '/' . $link_target;
3324         } else {
3325                 # we are in top (root) tree (dir)
3326                 $path = $link_target;
3327         }
3328
3329         # remove //, /./, and /../
3330         my @path_parts;
3331         foreach my $part (split('/', $path)) {
3332                 # discard '.' and ''
3333                 next if (!$part || $part eq '.');
3334                 # handle '..'
3335                 if ($part eq '..') {
3336                         if (@path_parts) {
3337                                 pop @path_parts;
3338                         } else {
3339                                 # link leads outside repository (outside top dir)
3340                                 return;
3341                         }
3342                 } else {
3343                         push @path_parts, $part;
3344                 }
3345         }
3346         $path = join('/', @path_parts);
3347
3348         return $path;
3349 }
3350
3351 # print tree entry (row of git_tree), but without encompassing <tr> element
3352 sub git_print_tree_entry {
3353         my ($t, $basedir, $hash_base, $have_blame) = @_;
3354
3355         my %base_key = ();
3356         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3357
3358         # The format of a table row is: mode list link.  Where mode is
3359         # the mode of the entry, list is the name of the entry, an href,
3360         # and link is the action links of the entry.
3361
3362         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3363         if ($t->{'type'} eq "blob") {
3364                 print "<td class=\"list\">" .
3365                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3366                                                file_name=>"$basedir$t->{'name'}", %base_key),
3367                                 -class => "list"}, esc_path($t->{'name'}));
3368                 if (S_ISLNK(oct $t->{'mode'})) {
3369                         my $link_target = git_get_link_target($t->{'hash'});
3370                         if ($link_target) {
3371                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3372                                 if (defined $norm_target) {
3373                                         print " -> " .
3374                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3375                                                                      file_name=>$norm_target),
3376                                                        -title => $norm_target}, esc_path($link_target));
3377                                 } else {
3378                                         print " -> " . esc_path($link_target);
3379                                 }
3380                         }
3381                 }
3382                 print "</td>\n";
3383                 print "<td class=\"link\">";
3384                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3385                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3386                               "blob");
3387                 if ($have_blame) {
3388                         print " | " .
3389                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3390                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3391                                       "blame");
3392                 }
3393                 if (defined $hash_base) {
3394                         print " | " .
3395                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3396                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3397                                       "history");
3398                 }
3399                 print " | " .
3400                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3401                                                file_name=>"$basedir$t->{'name'}")},
3402                                 "raw");
3403                 print "</td>\n";
3404
3405         } elsif ($t->{'type'} eq "tree") {
3406                 print "<td class=\"list\">";
3407                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3408                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3409                               esc_path($t->{'name'}));
3410                 print "</td>\n";
3411                 print "<td class=\"link\">";
3412                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3413                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3414                               "tree");
3415                 if (defined $hash_base) {
3416                         print " | " .
3417                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3418                                                      file_name=>"$basedir$t->{'name'}")},
3419                                       "history");
3420                 }
3421                 print "</td>\n";
3422         } else {
3423                 # unknown object: we can only present history for it
3424                 # (this includes 'commit' object, i.e. submodule support)
3425                 print "<td class=\"list\">" .
3426                       esc_path($t->{'name'}) .
3427                       "</td>\n";
3428                 print "<td class=\"link\">";
3429                 if (defined $hash_base) {
3430                         print $cgi->a({-href => href(action=>"history",
3431                                                      hash_base=>$hash_base,
3432                                                      file_name=>"$basedir$t->{'name'}")},
3433                                       "history");
3434                 }
3435                 print "</td>\n";
3436         }
3437 }
3438
3439 ## ......................................................................
3440 ## functions printing large fragments of HTML
3441
3442 # get pre-image filenames for merge (combined) diff
3443 sub fill_from_file_info {
3444         my ($diff, @parents) = @_;
3445
3446         $diff->{'from_file'} = [ ];
3447         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3448         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3449                 if ($diff->{'status'}[$i] eq 'R' ||
3450                     $diff->{'status'}[$i] eq 'C') {
3451                         $diff->{'from_file'}[$i] =
3452                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3453                 }
3454         }
3455
3456         return $diff;
3457 }
3458
3459 # is current raw difftree line of file deletion
3460 sub is_deleted {
3461         my $diffinfo = shift;
3462
3463         return $diffinfo->{'to_id'} eq ('0' x 40);
3464 }
3465
3466 # does patch correspond to [previous] difftree raw line
3467 # $diffinfo  - hashref of parsed raw diff format
3468 # $patchinfo - hashref of parsed patch diff format
3469 #              (the same keys as in $diffinfo)
3470 sub is_patch_split {
3471         my ($diffinfo, $patchinfo) = @_;
3472
3473         return defined $diffinfo && defined $patchinfo
3474                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3475 }
3476
3477
3478 sub git_difftree_body {
3479         my ($difftree, $hash, @parents) = @_;
3480         my ($parent) = $parents[0];
3481         my $have_blame = gitweb_check_feature('blame');
3482         print "<div class=\"list_head\">\n";
3483         if ($#{$difftree} > 10) {
3484                 print(($#{$difftree} + 1) . " files changed:\n");
3485         }
3486         print "</div>\n";
3487
3488         print "<table class=\"" .
3489               (@parents > 1 ? "combined " : "") .
3490               "diff_tree\">\n";
3491
3492         # header only for combined diff in 'commitdiff' view
3493         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3494         if ($has_header) {
3495                 # table header
3496                 print "<thead><tr>\n" .
3497                        "<th></th><th></th>\n"; # filename, patchN link
3498                 for (my $i = 0; $i < @parents; $i++) {
3499                         my $par = $parents[$i];
3500                         print "<th>" .
3501                               $cgi->a({-href => href(action=>"commitdiff",
3502                                                      hash=>$hash, hash_parent=>$par),
3503                                        -title => 'commitdiff to parent number ' .
3504                                                   ($i+1) . ': ' . substr($par,0,7)},
3505                                       $i+1) .
3506                               "&nbsp;</th>\n";
3507                 }
3508                 print "</tr></thead>\n<tbody>\n";
3509         }
3510
3511         my $alternate = 1;
3512         my $patchno = 0;
3513         foreach my $line (@{$difftree}) {
3514                 my $diff = parsed_difftree_line($line);
3515
3516                 if ($alternate) {
3517                         print "<tr class=\"dark\">\n";
3518                 } else {
3519                         print "<tr class=\"light\">\n";
3520                 }
3521                 $alternate ^= 1;
3522
3523                 if (exists $diff->{'nparents'}) { # combined diff
3524
3525                         fill_from_file_info($diff, @parents)
3526                                 unless exists $diff->{'from_file'};
3527
3528                         if (!is_deleted($diff)) {
3529                                 # file exists in the result (child) commit
3530                                 print "<td>" .
3531                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3532                                                              file_name=>$diff->{'to_file'},
3533                                                              hash_base=>$hash),
3534                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3535                                       "</td>\n";
3536                         } else {
3537                                 print "<td>" .
3538                                       esc_path($diff->{'to_file'}) .
3539                                       "</td>\n";
3540                         }
3541
3542                         if ($action eq 'commitdiff') {
3543                                 # link to patch
3544                                 $patchno++;
3545                                 print "<td class=\"link\">" .
3546                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3547                                       " | " .
3548                                       "</td>\n";
3549                         }
3550
3551                         my $has_history = 0;
3552                         my $not_deleted = 0;
3553                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3554                                 my $hash_parent = $parents[$i];
3555                                 my $from_hash = $diff->{'from_id'}[$i];
3556                                 my $from_path = $diff->{'from_file'}[$i];
3557                                 my $status = $diff->{'status'}[$i];
3558
3559                                 $has_history ||= ($status ne 'A');
3560                                 $not_deleted ||= ($status ne 'D');
3561
3562                                 if ($status eq 'A') {
3563                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3564                                 } elsif ($status eq 'D') {
3565                                         print "<td class=\"link\">" .
3566                                               $cgi->a({-href => href(action=>"blob",
3567                                                                      hash_base=>$hash,
3568                                                                      hash=>$from_hash,
3569                                                                      file_name=>$from_path)},
3570                                                       "blob" . ($i+1)) .
3571                                               " | </td>\n";
3572                                 } else {
3573                                         if ($diff->{'to_id'} eq $from_hash) {
3574                                                 print "<td class=\"link nochange\">";
3575                                         } else {
3576                                                 print "<td class=\"link\">";
3577                                         }
3578                                         print $cgi->a({-href => href(action=>"blobdiff",
3579                                                                      hash=>$diff->{'to_id'},
3580                                                                      hash_parent=>$from_hash,
3581                                                                      hash_base=>$hash,
3582                                                                      hash_parent_base=>$hash_parent,
3583                                                                      file_name=>$diff->{'to_file'},
3584                                                                      file_parent=>$from_path)},
3585                                                       "diff" . ($i+1)) .
3586                                               " | </td>\n";
3587                                 }
3588                         }
3589
3590                         print "<td class=\"link\">";
3591                         if ($not_deleted) {
3592                                 print $cgi->a({-href => href(action=>"blob",
3593                                                              hash=>$diff->{'to_id'},
3594                                                              file_name=>$diff->{'to_file'},
3595                                                              hash_base=>$hash)},
3596                                               "blob");
3597                                 print " | " if ($has_history);
3598                         }
3599                         if ($has_history) {
3600                                 print $cgi->a({-href => href(action=>"history",
3601                                                              file_name=>$diff->{'to_file'},
3602                                                              hash_base=>$hash)},
3603                                               "history");
3604                         }
3605                         print "</td>\n";
3606
3607                         print "</tr>\n";
3608                         next; # instead of 'else' clause, to avoid extra indent
3609                 }
3610                 # else ordinary diff
3611
3612                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3613                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3614                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3615                         $to_mode_oct = oct $diff->{'to_mode'};
3616                         if (S_ISREG($to_mode_oct)) { # only for regular file
3617                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3618                         }
3619                         $to_file_type = file_type($diff->{'to_mode'});
3620                 }
3621                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3622                         $from_mode_oct = oct $diff->{'from_mode'};
3623                         if (S_ISREG($to_mode_oct)) { # only for regular file
3624                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3625                         }
3626                         $from_file_type = file_type($diff->{'from_mode'});
3627                 }
3628
3629                 if ($diff->{'status'} eq "A") { # created
3630                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3631                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3632                         $mode_chng   .= "]</span>";
3633                         print "<td>";
3634                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3635                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3636                                       -class => "list"}, esc_path($diff->{'file'}));
3637                         print "</td>\n";
3638                         print "<td>$mode_chng</td>\n";
3639                         print "<td class=\"link\">";
3640                         if ($action eq 'commitdiff') {
3641                                 # link to patch
3642                                 $patchno++;
3643                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3644                                 print " | ";
3645                         }
3646                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3647                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3648                                       "blob");
3649                         print "</td>\n";
3650
3651                 } elsif ($diff->{'status'} eq "D") { # deleted
3652                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3653                         print "<td>";
3654                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3655                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3656                                        -class => "list"}, esc_path($diff->{'file'}));
3657                         print "</td>\n";
3658                         print "<td>$mode_chng</td>\n";
3659                         print "<td class=\"link\">";
3660                         if ($action eq 'commitdiff') {
3661                                 # link to patch
3662                                 $patchno++;
3663                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3664                                 print " | ";
3665                         }
3666                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3667                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3668                                       "blob") . " | ";
3669                         if ($have_blame) {
3670                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3671                                                              file_name=>$diff->{'file'})},
3672                                               "blame") . " | ";
3673                         }
3674                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3675                                                      file_name=>$diff->{'file'})},
3676                                       "history");
3677                         print "</td>\n";
3678
3679                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3680                         my $mode_chnge = "";
3681                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3682                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3683                                 if ($from_file_type ne $to_file_type) {
3684                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3685                                 }
3686                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3687                                         if ($from_mode_str && $to_mode_str) {
3688                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3689                                         } elsif ($to_mode_str) {
3690                                                 $mode_chnge .= " mode: $to_mode_str";
3691                                         }
3692                                 }
3693                                 $mode_chnge .= "]</span>\n";
3694                         }
3695                         print "<td>";
3696                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3697                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3698                                       -class => "list"}, esc_path($diff->{'file'}));
3699                         print "</td>\n";
3700                         print "<td>$mode_chnge</td>\n";
3701                         print "<td class=\"link\">";
3702                         if ($action eq 'commitdiff') {
3703                                 # link to patch
3704                                 $patchno++;
3705                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3706                                       " | ";
3707                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3708                                 # "commit" view and modified file (not onlu mode changed)
3709                                 print $cgi->a({-href => href(action=>"blobdiff",
3710                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3711                                                              hash_base=>$hash, hash_parent_base=>$parent,
3712                                                              file_name=>$diff->{'file'})},
3713                                               "diff") .
3714                                       " | ";
3715                         }
3716                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3717                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3718                                        "blob") . " | ";
3719                         if ($have_blame) {
3720                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3721                                                              file_name=>$diff->{'file'})},
3722                                               "blame") . " | ";
3723                         }
3724                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3725                                                      file_name=>$diff->{'file'})},
3726                                       "history");
3727                         print "</td>\n";
3728
3729                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3730                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3731                         my $nstatus = $status_name{$diff->{'status'}};
3732                         my $mode_chng = "";
3733                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3734                                 # mode also for directories, so we cannot use $to_mode_str
3735                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3736                         }
3737                         print "<td>" .
3738                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3739                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3740                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3741                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3742                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3743                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3744                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3745                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3746                               "<td class=\"link\">";
3747                         if ($action eq 'commitdiff') {
3748                                 # link to patch
3749                                 $patchno++;
3750                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3751                                       " | ";
3752                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3753                                 # "commit" view and modified file (not only pure rename or copy)
3754                                 print $cgi->a({-href => href(action=>"blobdiff",
3755                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3756                                                              hash_base=>$hash, hash_parent_base=>$parent,
3757                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3758                                               "diff") .
3759                                       " | ";
3760                         }
3761                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3762                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3763                                       "blob") . " | ";
3764                         if ($have_blame) {
3765                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3766                                                              file_name=>$diff->{'to_file'})},
3767                                               "blame") . " | ";
3768                         }
3769                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3770                                                     file_name=>$diff->{'to_file'})},
3771                                       "history");
3772                         print "</td>\n";
3773
3774                 } # we should not encounter Unmerged (U) or Unknown (X) status
3775                 print "</tr>\n";
3776         }
3777         print "</tbody>" if $has_header;
3778         print "</table>\n";
3779 }
3780
3781 sub git_patchset_body {
3782         my ($fd, $difftree, $hash, @hash_parents) = @_;
3783         my ($hash_parent) = $hash_parents[0];
3784
3785         my $is_combined = (@hash_parents > 1);
3786         my $patch_idx = 0;
3787         my $patch_number = 0;
3788         my $patch_line;
3789         my $diffinfo;
3790         my $to_name;
3791         my (%from, %to);
3792
3793         print "<div class=\"patchset\">\n";
3794
3795         # skip to first patch
3796         while ($patch_line = <$fd>) {
3797                 chomp $patch_line;
3798
3799                 last if ($patch_line =~ m/^diff /);
3800         }
3801
3802  PATCH:
3803         while ($patch_line) {
3804
3805                 # parse "git diff" header line
3806                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3807                         # $1 is from_name, which we do not use
3808                         $to_name = unquote($2);
3809                         $to_name =~ s!^b/!!;
3810                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3811                         # $1 is 'cc' or 'combined', which we do not use
3812                         $to_name = unquote($2);
3813                 } else {
3814                         $to_name = undef;
3815                 }
3816
3817                 # check if current patch belong to current raw line
3818                 # and parse raw git-diff line if needed
3819                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3820                         # this is continuation of a split patch
3821                         print "<div class=\"patch cont\">\n";
3822                 } else {
3823                         # advance raw git-diff output if needed
3824                         $patch_idx++ if defined $diffinfo;
3825
3826                         # read and prepare patch information
3827                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3828
3829                         # compact combined diff output can have some patches skipped
3830                         # find which patch (using pathname of result) we are at now;
3831                         if ($is_combined) {
3832                                 while ($to_name ne $diffinfo->{'to_file'}) {
3833                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3834                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3835                                               "</div>\n";  # class="patch"
3836
3837                                         $patch_idx++;
3838                                         $patch_number++;
3839
3840                                         last if $patch_idx > $#$difftree;
3841                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3842                                 }
3843                         }
3844
3845                         # modifies %from, %to hashes
3846                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3847
3848                         # this is first patch for raw difftree line with $patch_idx index
3849                         # we index @$difftree array from 0, but number patches from 1
3850                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3851                 }
3852
3853                 # git diff header
3854                 #assert($patch_line =~ m/^diff /) if DEBUG;
3855                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3856                 $patch_number++;
3857                 # print "git diff" header
3858                 print format_git_diff_header_line($patch_line, $diffinfo,
3859                                                   \%from, \%to);
3860
3861                 # print extended diff header
3862                 print "<div class=\"diff extended_header\">\n";
3863         EXTENDED_HEADER:
3864                 while ($patch_line = <$fd>) {
3865                         chomp $patch_line;
3866
3867                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3868
3869                         print format_extended_diff_header_line($patch_line, $diffinfo,
3870                                                                \%from, \%to);
3871                 }
3872                 print "</div>\n"; # class="diff extended_header"
3873
3874                 # from-file/to-file diff header
3875                 if (! $patch_line) {
3876                         print "</div>\n"; # class="patch"
3877                         last PATCH;
3878                 }
3879                 next PATCH if ($patch_line =~ m/^diff /);
3880                 #assert($patch_line =~ m/^---/) if DEBUG;
3881
3882                 my $last_patch_line = $patch_line;
3883                 $patch_line = <$fd>;
3884                 chomp $patch_line;
3885                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3886
3887                 print format_diff_from_to_header($last_patch_line, $patch_line,
3888                                                  $diffinfo, \%from, \%to,
3889                                                  @hash_parents);
3890
3891                 # the patch itself
3892         LINE:
3893                 while ($patch_line = <$fd>) {
3894                         chomp $patch_line;
3895
3896                         next PATCH if ($patch_line =~ m/^diff /);
3897
3898                         print format_diff_line($patch_line, \%from, \%to);
3899                 }
3900
3901         } continue {
3902                 print "</div>\n"; # class="patch"
3903         }
3904
3905         # for compact combined (--cc) format, with chunk and patch simpliciaction
3906         # patchset might be empty, but there might be unprocessed raw lines
3907         for (++$patch_idx if $patch_number > 0;
3908              $patch_idx < @$difftree;
3909              ++$patch_idx) {
3910                 # read and prepare patch information
3911                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3912
3913                 # generate anchor for "patch" links in difftree / whatchanged part
3914                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3915                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3916                       "</div>\n";  # class="patch"
3917
3918                 $patch_number++;
3919         }
3920
3921         if ($patch_number == 0) {
3922                 if (@hash_parents > 1) {
3923                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3924                 } else {
3925                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3926                 }
3927         }
3928
3929         print "</div>\n"; # class="patchset"
3930 }
3931
3932 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3933
3934 # fills project list info (age, description, owner, forks) for each
3935 # project in the list, removing invalid projects from returned list
3936 # NOTE: modifies $projlist, but does not remove entries from it
3937 sub fill_project_list_info {
3938         my ($projlist, $check_forks) = @_;
3939         my @projects;
3940
3941         my $show_ctags = gitweb_check_feature('ctags');
3942  PROJECT:
3943         foreach my $pr (@$projlist) {
3944                 my (@activity) = git_get_last_activity($pr->{'path'});
3945                 unless (@activity) {
3946                         next PROJECT;
3947                 }
3948                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3949                 if (!defined $pr->{'descr'}) {
3950                         my $descr = git_get_project_description($pr->{'path'}) || "";
3951                         $descr = to_utf8($descr);
3952                         $pr->{'descr_long'} = $descr;
3953                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3954                 }
3955                 if (!defined $pr->{'owner'}) {
3956                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3957                 }
3958                 if ($check_forks) {
3959                         my $pname = $pr->{'path'};
3960                         if (($pname =~ s/\.git$//) &&
3961                             ($pname !~ /\/$/) &&
3962                             (-d "$projectroot/$pname")) {
3963                                 $pr->{'forks'} = "-d $projectroot/$pname";
3964                         }       else {
3965                                 $pr->{'forks'} = 0;
3966                         }
3967                 }
3968                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3969                 push @projects, $pr;
3970         }
3971
3972         return @projects;
3973 }
3974
3975 # print 'sort by' <th> element, generating 'sort by $name' replay link
3976 # if that order is not selected
3977 sub print_sort_th {
3978         my ($name, $order, $header) = @_;
3979         $header ||= ucfirst($name);
3980
3981         if ($order eq $name) {
3982                 print "<th>$header</th>\n";
3983         } else {
3984                 print "<th>" .
3985                       $cgi->a({-href => href(-replay=>1, order=>$name),
3986                                -class => "header"}, $header) .
3987                       "</th>\n";
3988         }
3989 }
3990
3991 sub git_project_list_body {
3992         # actually uses global variable $project
3993         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3994
3995         my $check_forks = gitweb_check_feature('forks');
3996         my @projects = fill_project_list_info($projlist, $check_forks);
3997
3998         $order ||= $default_projects_order;
3999         $from = 0 unless defined $from;
4000         $to = $#projects if (!defined $to || $#projects < $to);
4001
4002         my %order_info = (
4003                 project => { key => 'path', type => 'str' },
4004                 descr => { key => 'descr_long', type => 'str' },
4005                 owner => { key => 'owner', type => 'str' },
4006                 age => { key => 'age', type => 'num' }
4007         );
4008         my $oi = $order_info{$order};
4009         if ($oi->{'type'} eq 'str') {
4010                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4011         } else {
4012                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4013         }
4014
4015         my $show_ctags = gitweb_check_feature('ctags');
4016         if ($show_ctags) {
4017                 my %ctags;
4018                 foreach my $p (@projects) {
4019                         foreach my $ct (keys %{$p->{'ctags'}}) {
4020                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4021                         }
4022                 }
4023                 my $cloud = git_populate_project_tagcloud(\%ctags);
4024                 print git_show_project_tagcloud($cloud, 64);
4025         }
4026
4027         print "<table class=\"project_list\">\n";
4028         unless ($no_header) {
4029                 print "<tr>\n";
4030                 if ($check_forks) {
4031                         print "<th></th>\n";
4032                 }
4033                 print_sort_th('project', $order, 'Project');
4034                 print_sort_th('descr', $order, 'Description');
4035                 print_sort_th('owner', $order, 'Owner');
4036                 print_sort_th('age', $order, 'Last Change');
4037                 print "<th></th>\n" . # for links
4038                       "</tr>\n";
4039         }
4040         my $alternate = 1;
4041         my $tagfilter = $cgi->param('by_tag');
4042         for (my $i = $from; $i <= $to; $i++) {
4043                 my $pr = $projects[$i];
4044
4045                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4046                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4047                         and not $pr->{'descr_long'} =~ /$searchtext/;
4048                 # Weed out forks or non-matching entries of search
4049                 if ($check_forks) {
4050                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4051                         $forkbase="^$forkbase" if $forkbase;
4052                         next if not $searchtext and not $tagfilter and $show_ctags
4053                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4054                 }
4055
4056                 if ($alternate) {
4057                         print "<tr class=\"dark\">\n";
4058                 } else {
4059                         print "<tr class=\"light\">\n";
4060                 }
4061                 $alternate ^= 1;
4062                 if ($check_forks) {
4063                         print "<td>";
4064                         if ($pr->{'forks'}) {
4065                                 print "<!-- $pr->{'forks'} -->\n";
4066                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4067                         }
4068                         print "</td>\n";
4069                 }
4070                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4071                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4072                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4073                                         -class => "list", -title => $pr->{'descr_long'}},
4074                                         esc_html($pr->{'descr'})) . "</td>\n" .
4075                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4076                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4077                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4078                       "<td class=\"link\">" .
4079                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4080                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4081                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4082                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4083                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4084                       "</td>\n" .
4085                       "</tr>\n";
4086         }
4087         if (defined $extra) {
4088                 print "<tr>\n";
4089                 if ($check_forks) {
4090                         print "<td></td>\n";
4091                 }
4092                 print "<td colspan=\"5\">$extra</td>\n" .
4093                       "</tr>\n";
4094         }
4095         print "</table>\n";
4096 }
4097
4098 sub git_shortlog_body {
4099         # uses global variable $project
4100         my ($commitlist, $from, $to, $refs, $extra) = @_;
4101
4102         $from = 0 unless defined $from;
4103         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4104
4105         print "<table class=\"shortlog\">\n";
4106         my $alternate = 1;
4107         for (my $i = $from; $i <= $to; $i++) {
4108                 my %co = %{$commitlist->[$i]};
4109                 my $commit = $co{'id'};
4110                 my $ref = format_ref_marker($refs, $commit);
4111                 if ($alternate) {
4112                         print "<tr class=\"dark\">\n";
4113                 } else {
4114                         print "<tr class=\"light\">\n";
4115                 }
4116                 $alternate ^= 1;
4117                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4118                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4119                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4120                       "<td><i>" . $author . "</i></td>\n" .
4121                       "<td>";
4122                 print format_subject_html($co{'title'}, $co{'title_short'},
4123                                           href(action=>"commit", hash=>$commit), $ref);
4124                 print "</td>\n" .
4125                       "<td class=\"link\">" .
4126                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4127                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4128                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4129                 my $snapshot_links = format_snapshot_links($commit);
4130                 if (defined $snapshot_links) {
4131                         print " | " . $snapshot_links;
4132                 }
4133                 print "</td>\n" .
4134                       "</tr>\n";
4135         }
4136         if (defined $extra) {
4137                 print "<tr>\n" .
4138                       "<td colspan=\"4\">$extra</td>\n" .
4139                       "</tr>\n";
4140         }
4141         print "</table>\n";
4142 }
4143
4144 sub git_history_body {
4145         # Warning: assumes constant type (blob or tree) during history
4146         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4147
4148         $from = 0 unless defined $from;
4149         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4150
4151         print "<table class=\"history\">\n";
4152         my $alternate = 1;
4153         for (my $i = $from; $i <= $to; $i++) {
4154                 my %co = %{$commitlist->[$i]};
4155                 if (!%co) {
4156                         next;
4157                 }
4158                 my $commit = $co{'id'};
4159
4160                 my $ref = format_ref_marker($refs, $commit);
4161
4162                 if ($alternate) {
4163                         print "<tr class=\"dark\">\n";
4164                 } else {
4165                         print "<tr class=\"light\">\n";
4166                 }
4167                 $alternate ^= 1;
4168         # shortlog uses      chop_str($co{'author_name'}, 10)
4169                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4170                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4171                       "<td><i>" . $author . "</i></td>\n" .
4172                       "<td>";
4173                 # originally git_history used chop_str($co{'title'}, 50)
4174                 print format_subject_html($co{'title'}, $co{'title_short'},
4175                                           href(action=>"commit", hash=>$commit), $ref);
4176                 print "</td>\n" .
4177                       "<td class=\"link\">" .
4178                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4179                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4180
4181                 if ($ftype eq 'blob') {
4182                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4183                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4184                         if (defined $blob_current && defined $blob_parent &&
4185                                         $blob_current ne $blob_parent) {
4186                                 print " | " .
4187                                         $cgi->a({-href => href(action=>"blobdiff",
4188                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4189                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4190                                                                file_name=>$file_name)},
4191                                                 "diff to current");
4192                         }
4193                 }
4194                 print "</td>\n" .
4195                       "</tr>\n";
4196         }
4197         if (defined $extra) {
4198                 print "<tr>\n" .
4199                       "<td colspan=\"4\">$extra</td>\n" .
4200                       "</tr>\n";
4201         }
4202         print "</table>\n";
4203 }
4204
4205 sub git_tags_body {
4206         # uses global variable $project
4207         my ($taglist, $from, $to, $extra) = @_;
4208         $from = 0 unless defined $from;
4209         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4210
4211         print "<table class=\"tags\">\n";
4212         my $alternate = 1;
4213         for (my $i = $from; $i <= $to; $i++) {
4214                 my $entry = $taglist->[$i];
4215                 my %tag = %$entry;
4216                 my $comment = $tag{'subject'};
4217                 my $comment_short;
4218                 if (defined $comment) {
4219                         $comment_short = chop_str($comment, 30, 5);
4220                 }
4221                 if ($alternate) {
4222                         print "<tr class=\"dark\">\n";
4223                 } else {
4224                         print "<tr class=\"light\">\n";
4225                 }
4226                 $alternate ^= 1;
4227                 if (defined $tag{'age'}) {
4228                         print "<td><i>$tag{'age'}</i></td>\n";
4229                 } else {
4230                         print "<td></td>\n";
4231                 }
4232                 print "<td>" .
4233                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4234                                -class => "list name"}, esc_html($tag{'name'})) .
4235                       "</td>\n" .
4236                       "<td>";
4237                 if (defined $comment) {
4238                         print format_subject_html($comment, $comment_short,
4239                                                   href(action=>"tag", hash=>$tag{'id'}));
4240                 }
4241                 print "</td>\n" .
4242                       "<td class=\"selflink\">";
4243                 if ($tag{'type'} eq "tag") {
4244                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4245                 } else {
4246                         print "&nbsp;";
4247                 }
4248                 print "</td>\n" .
4249                       "<td class=\"link\">" . " | " .
4250                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4251                 if ($tag{'reftype'} eq "commit") {
4252                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4253                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4254                 } elsif ($tag{'reftype'} eq "blob") {
4255                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4256                 }
4257                 print "</td>\n" .
4258                       "</tr>";
4259         }
4260         if (defined $extra) {
4261                 print "<tr>\n" .
4262                       "<td colspan=\"5\">$extra</td>\n" .
4263                       "</tr>\n";
4264         }
4265         print "</table>\n";
4266 }
4267
4268 sub git_heads_body {
4269         # uses global variable $project
4270         my ($headlist, $head, $from, $to, $extra) = @_;
4271         $from = 0 unless defined $from;
4272         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4273
4274         print "<table class=\"heads\">\n";
4275         my $alternate = 1;
4276         for (my $i = $from; $i <= $to; $i++) {
4277                 my $entry = $headlist->[$i];
4278                 my %ref = %$entry;
4279                 my $curr = $ref{'id'} eq $head;
4280                 if ($alternate) {
4281                         print "<tr class=\"dark\">\n";
4282                 } else {
4283                         print "<tr class=\"light\">\n";
4284                 }
4285                 $alternate ^= 1;
4286                 print "<td><i>$ref{'age'}</i></td>\n" .
4287                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4288                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4289                                -class => "list name"},esc_html($ref{'name'})) .
4290                       "</td>\n" .
4291                       "<td class=\"link\">" .
4292                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4293                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4294                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4295                       "</td>\n" .
4296                       "</tr>";
4297         }
4298         if (defined $extra) {
4299                 print "<tr>\n" .
4300                       "<td colspan=\"3\">$extra</td>\n" .
4301                       "</tr>\n";
4302         }
4303         print "</table>\n";
4304 }
4305
4306 sub git_search_grep_body {
4307         my ($commitlist, $from, $to, $extra) = @_;
4308         $from = 0 unless defined $from;
4309         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4310
4311         print "<table class=\"commit_search\">\n";
4312         my $alternate = 1;
4313         for (my $i = $from; $i <= $to; $i++) {
4314                 my %co = %{$commitlist->[$i]};
4315                 if (!%co) {
4316                         next;
4317                 }
4318                 my $commit = $co{'id'};
4319                 if ($alternate) {
4320                         print "<tr class=\"dark\">\n";
4321                 } else {
4322                         print "<tr class=\"light\">\n";
4323                 }
4324                 $alternate ^= 1;
4325                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4326                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4327                       "<td><i>" . $author . "</i></td>\n" .
4328                       "<td>" .
4329                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4330                                -class => "list subject"},
4331                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4332                 my $comment = $co{'comment'};
4333                 foreach my $line (@$comment) {
4334                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4335                                 my ($lead, $match, $trail) = ($1, $2, $3);
4336                                 $match = chop_str($match, 70, 5, 'center');
4337                                 my $contextlen = int((80 - length($match))/2);
4338                                 $contextlen = 30 if ($contextlen > 30);
4339                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4340                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4341
4342                                 $lead  = esc_html($lead);
4343                                 $match = esc_html($match);
4344                                 $trail = esc_html($trail);
4345
4346                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4347                         }
4348                 }
4349                 print "</td>\n" .
4350                       "<td class=\"link\">" .
4351                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4352                       " | " .
4353                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4354                       " | " .
4355                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4356                 print "</td>\n" .
4357                       "</tr>\n";
4358         }
4359         if (defined $extra) {
4360                 print "<tr>\n" .
4361                       "<td colspan=\"3\">$extra</td>\n" .
4362                       "</tr>\n";
4363         }
4364         print "</table>\n";
4365 }
4366
4367 ## ======================================================================
4368 ## ======================================================================
4369 ## actions
4370
4371 sub git_project_list {
4372         my $order = $input_params{'order'};
4373         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4374                 die_error(400, "Unknown order parameter");
4375         }
4376
4377         my @list = git_get_projects_list();
4378         if (!@list) {
4379                 die_error(404, "No projects found");
4380         }
4381
4382         git_header_html();
4383         if (-f $home_text) {
4384                 print "<div class=\"index_include\">\n";
4385                 insert_file($home_text);
4386                 print "</div>\n";
4387         }
4388         print $cgi->startform(-method => "get") .
4389               "<p class=\"projsearch\">Search:\n" .
4390               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4391               "</p>" .
4392               $cgi->end_form() . "\n";
4393         git_project_list_body(\@list, $order);
4394         git_footer_html();
4395 }
4396
4397 sub git_forks {
4398         my $order = $input_params{'order'};
4399         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4400                 die_error(400, "Unknown order parameter");
4401         }
4402
4403         my @list = git_get_projects_list($project);
4404         if (!@list) {
4405                 die_error(404, "No forks found");
4406         }
4407
4408         git_header_html();
4409         git_print_page_nav('','');
4410         git_print_header_div('summary', "$project forks");
4411         git_project_list_body(\@list, $order);
4412         git_footer_html();
4413 }
4414
4415 sub git_project_index {
4416         my @projects = git_get_projects_list($project);
4417
4418         print $cgi->header(
4419                 -type => 'text/plain',
4420                 -charset => 'utf-8',
4421                 -content_disposition => 'inline; filename="index.aux"');
4422
4423         foreach my $pr (@projects) {
4424                 if (!exists $pr->{'owner'}) {
4425                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4426                 }
4427
4428                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4429                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4430                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4431                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4432                 $path  =~ s/ /\+/g;
4433                 $owner =~ s/ /\+/g;
4434
4435                 print "$path $owner\n";
4436         }
4437 }
4438
4439 sub git_summary {
4440         my $descr = git_get_project_description($project) || "none";
4441         my %co = parse_commit("HEAD");
4442         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4443         my $head = $co{'id'};
4444
4445         my $owner = git_get_project_owner($project);
4446
4447         my $refs = git_get_references();
4448         # These get_*_list functions return one more to allow us to see if
4449         # there are more ...
4450         my @taglist  = git_get_tags_list(16);
4451         my @headlist = git_get_heads_list(16);
4452         my @forklist;
4453         my $check_forks = gitweb_check_feature('forks');
4454
4455         if ($check_forks) {
4456                 @forklist = git_get_projects_list($project);
4457         }
4458
4459         git_header_html();
4460         git_print_page_nav('summary','', $head);
4461
4462         print "<div class=\"title\">&nbsp;</div>\n";
4463         print "<table class=\"projects_list\">\n" .
4464               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4465               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4466         if (defined $cd{'rfc2822'}) {
4467                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4468         }
4469
4470         # use per project git URL list in $projectroot/$project/cloneurl
4471         # or make project git URL from git base URL and project name
4472         my $url_tag = "URL";
4473         my @url_list = git_get_project_url_list($project);
4474         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4475         foreach my $git_url (@url_list) {
4476                 next unless $git_url;
4477                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4478                 $url_tag = "";
4479         }
4480
4481         # Tag cloud
4482         my $show_ctags = gitweb_check_feature('ctags');
4483         if ($show_ctags) {
4484                 my $ctags = git_get_project_ctags($project);
4485                 my $cloud = git_populate_project_tagcloud($ctags);
4486                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4487                 print "</td>\n<td>" unless %$ctags;
4488                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4489                 print "</td>\n<td>" if %$ctags;
4490                 print git_show_project_tagcloud($cloud, 48);
4491                 print "</td></tr>";
4492         }
4493
4494         print "</table>\n";
4495
4496         if (-s "$projectroot/$project/README.html") {
4497                 print "<div class=\"title\">readme</div>\n" .
4498                       "<div class=\"readme\">\n";
4499                 insert_file("$projectroot/$project/README.html");
4500                 print "\n</div>\n"; # class="readme"
4501         }
4502
4503         # we need to request one more than 16 (0..15) to check if
4504         # those 16 are all
4505         my @commitlist = $head ? parse_commits($head, 17) : ();
4506         if (@commitlist) {
4507                 git_print_header_div('shortlog');
4508                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4509                                   $#commitlist <=  15 ? undef :
4510                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4511         }
4512
4513         if (@taglist) {
4514                 git_print_header_div('tags');
4515                 git_tags_body(\@taglist, 0, 15,
4516                               $#taglist <=  15 ? undef :
4517                               $cgi->a({-href => href(action=>"tags")}, "..."));
4518         }
4519
4520         if (@headlist) {
4521                 git_print_header_div('heads');
4522                 git_heads_body(\@headlist, $head, 0, 15,
4523                                $#headlist <= 15 ? undef :
4524                                $cgi->a({-href => href(action=>"heads")}, "..."));
4525         }
4526
4527         if (@forklist) {
4528                 git_print_header_div('forks');
4529                 git_project_list_body(\@forklist, 'age', 0, 15,
4530                                       $#forklist <= 15 ? undef :
4531                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4532                                       'no_header');
4533         }
4534
4535         git_footer_html();
4536 }
4537
4538 sub git_tag {
4539         my $head = git_get_head_hash($project);
4540         git_header_html();
4541         git_print_page_nav('','', $head,undef,$head);
4542         my %tag = parse_tag($hash);
4543
4544         if (! %tag) {
4545                 die_error(404, "Unknown tag object");
4546         }
4547
4548         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4549         print "<div class=\"title_text\">\n" .
4550               "<table class=\"object_header\">\n" .
4551               "<tr>\n" .
4552               "<td>object</td>\n" .
4553               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4554                                $tag{'object'}) . "</td>\n" .
4555               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4556                                               $tag{'type'}) . "</td>\n" .
4557               "</tr>\n";
4558         if (defined($tag{'author'})) {
4559                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4560                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4561                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4562                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4563                         "</td></tr>\n";
4564         }
4565         print "</table>\n\n" .
4566               "</div>\n";
4567         print "<div class=\"page_body\">";
4568         my $comment = $tag{'comment'};
4569         foreach my $line (@$comment) {
4570                 chomp $line;
4571                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4572         }
4573         print "</div>\n";
4574         git_footer_html();
4575 }
4576
4577 sub git_blame {
4578         my $fd;
4579         my $ftype;
4580
4581         gitweb_check_feature('blame')
4582             or die_error(403, "Blame view not allowed");
4583
4584         die_error(400, "No file name given") unless $file_name;
4585         $hash_base ||= git_get_head_hash($project);
4586         die_error(404, "Couldn't find base commit") unless ($hash_base);
4587         my %co = parse_commit($hash_base)
4588                 or die_error(404, "Commit not found");
4589         if (!defined $hash) {
4590                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4591                         or die_error(404, "Error looking up file");
4592         }
4593         $ftype = git_get_type($hash);
4594         if ($ftype !~ "blob") {
4595                 die_error(400, "Object is not a blob");
4596         }
4597         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4598               $file_name, $hash_base)
4599                 or die_error(500, "Open git-blame failed");
4600         git_header_html();
4601         my $formats_nav =
4602                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4603                         "blob") .
4604                 " | " .
4605                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4606                         "history") .
4607                 " | " .
4608                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4609                         "HEAD");
4610         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4611         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4612         git_print_page_path($file_name, $ftype, $hash_base);
4613         my @rev_color = (qw(light2 dark2));
4614         my $num_colors = scalar(@rev_color);
4615         my $current_color = 0;
4616         my $last_rev;
4617         print <<HTML;
4618 <div class="page_body">
4619 <table class="blame">
4620 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4621 HTML
4622         my %metainfo = ();
4623         while (1) {
4624                 $_ = <$fd>;
4625                 last unless defined $_;
4626                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4627                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4628                 if (!exists $metainfo{$full_rev}) {
4629                         $metainfo{$full_rev} = {};
4630                 }
4631                 my $meta = $metainfo{$full_rev};
4632                 while (<$fd>) {
4633                         last if (s/^\t//);
4634                         if (/^(\S+) (.*)$/) {
4635                                 $meta->{$1} = $2;
4636                         }
4637                 }
4638                 my $data = $_;
4639                 chomp $data;
4640                 my $rev = substr($full_rev, 0, 8);
4641                 my $author = $meta->{'author'};
4642                 my %date = parse_date($meta->{'author-time'},
4643                                       $meta->{'author-tz'});
4644                 my $date = $date{'iso-tz'};
4645                 if ($group_size) {
4646                         $current_color = ++$current_color % $num_colors;
4647                 }
4648                 print "<tr class=\"$rev_color[$current_color]\">\n";
4649                 if ($group_size) {
4650                         print "<td class=\"sha1\"";
4651                         print " title=\"". esc_html($author) . ", $date\"";
4652                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4653                         print ">";
4654                         print $cgi->a({-href => href(action=>"commit",
4655                                                      hash=>$full_rev,
4656                                                      file_name=>$file_name)},
4657                                       esc_html($rev));
4658                         print "</td>\n";
4659                 }
4660                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4661                         or die_error(500, "Open git-rev-parse failed");
4662                 my $parent_commit = <$dd>;
4663                 close $dd;
4664                 chomp($parent_commit);
4665                 my $blamed = href(action => 'blame',
4666                                   file_name => $meta->{'filename'},
4667                                   hash_base => $parent_commit);
4668                 print "<td class=\"linenr\">";
4669                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4670                                 -id => "l$lineno",
4671                                 -class => "linenr" },
4672                               esc_html($lineno));
4673                 print "</td>";
4674                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4675                 print "</tr>\n";
4676         }
4677         print "</table>\n";
4678         print "</div>";
4679         close $fd
4680                 or print "Reading blob failed\n";
4681         git_footer_html();
4682 }
4683
4684 sub git_tags {
4685         my $head = git_get_head_hash($project);
4686         git_header_html();
4687         git_print_page_nav('','', $head,undef,$head);
4688         git_print_header_div('summary', $project);
4689
4690         my @tagslist = git_get_tags_list();
4691         if (@tagslist) {
4692                 git_tags_body(\@tagslist);
4693         }
4694         git_footer_html();
4695 }
4696
4697 sub git_heads {
4698         my $head = git_get_head_hash($project);
4699         git_header_html();
4700         git_print_page_nav('','', $head,undef,$head);
4701         git_print_header_div('summary', $project);
4702
4703         my @headslist = git_get_heads_list();
4704         if (@headslist) {
4705                 git_heads_body(\@headslist, $head);
4706         }
4707         git_footer_html();
4708 }
4709
4710 sub git_blob_plain {
4711         my $type = shift;
4712         my $expires;
4713
4714         if (!defined $hash) {
4715                 if (defined $file_name) {
4716                         my $base = $hash_base || git_get_head_hash($project);
4717                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4718                                 or die_error(404, "Cannot find file");
4719                 } else {
4720                         die_error(400, "No file name defined");
4721                 }
4722         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4723                 # blobs defined by non-textual hash id's can be cached
4724                 $expires = "+1d";
4725         }
4726
4727         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4728                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4729
4730         # content-type (can include charset)
4731         $type = blob_contenttype($fd, $file_name, $type);
4732
4733         # "save as" filename, even when no $file_name is given
4734         my $save_as = "$hash";
4735         if (defined $file_name) {
4736                 $save_as = $file_name;
4737         } elsif ($type =~ m/^text\//) {
4738                 $save_as .= '.txt';
4739         }
4740
4741         print $cgi->header(
4742                 -type => $type,
4743                 -expires => $expires,
4744                 -content_disposition => 'inline; filename="' . $save_as . '"');
4745         undef $/;
4746         binmode STDOUT, ':raw';
4747         print <$fd>;
4748         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4749         $/ = "\n";
4750         close $fd;
4751 }
4752
4753 sub git_blob {
4754         my $expires;
4755
4756         if (!defined $hash) {
4757                 if (defined $file_name) {
4758                         my $base = $hash_base || git_get_head_hash($project);
4759                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4760                                 or die_error(404, "Cannot find file");
4761                 } else {
4762                         die_error(400, "No file name defined");
4763                 }
4764         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4765                 # blobs defined by non-textual hash id's can be cached
4766                 $expires = "+1d";
4767         }
4768
4769         my $have_blame = gitweb_check_feature('blame');
4770         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4771                 or die_error(500, "Couldn't cat $file_name, $hash");
4772         my $mimetype = blob_mimetype($fd, $file_name);
4773         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4774                 close $fd;
4775                 return git_blob_plain($mimetype);
4776         }
4777         # we can have blame only for text/* mimetype
4778         $have_blame &&= ($mimetype =~ m!^text/!);
4779
4780         git_header_html(undef, $expires);
4781         my $formats_nav = '';
4782         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4783                 if (defined $file_name) {
4784                         if ($have_blame) {
4785                                 $formats_nav .=
4786                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4787                                                 "blame") .
4788                                         " | ";
4789                         }
4790                         $formats_nav .=
4791                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4792                                         "history") .
4793                                 " | " .
4794                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4795                                         "raw") .
4796                                 " | " .
4797                                 $cgi->a({-href => href(action=>"blob",
4798                                                        hash_base=>"HEAD", file_name=>$file_name)},
4799                                         "HEAD");
4800                 } else {
4801                         $formats_nav .=
4802                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4803                                         "raw");
4804                 }
4805                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4806                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4807         } else {
4808                 print "<div class=\"page_nav\">\n" .
4809                       "<br/><br/></div>\n" .
4810                       "<div class=\"title\">$hash</div>\n";
4811         }
4812         git_print_page_path($file_name, "blob", $hash_base);
4813         print "<div class=\"page_body\">\n";
4814         if ($mimetype =~ m!^image/!) {
4815                 print qq!<img type="$mimetype"!;
4816                 if ($file_name) {
4817                         print qq! alt="$file_name" title="$file_name"!;
4818                 }
4819                 print qq! src="! .
4820                       href(action=>"blob_plain", hash=>$hash,
4821                            hash_base=>$hash_base, file_name=>$file_name) .
4822                       qq!" />\n!;
4823         } else {
4824                 my $nr;
4825                 while (my $line = <$fd>) {
4826                         chomp $line;
4827                         $nr++;
4828                         $line = untabify($line);
4829                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4830                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4831                 }
4832         }
4833         close $fd
4834                 or print "Reading blob failed.\n";
4835         print "</div>";
4836         git_footer_html();
4837 }
4838
4839 sub git_tree {
4840         if (!defined $hash_base) {
4841                 $hash_base = "HEAD";
4842         }
4843         if (!defined $hash) {
4844                 if (defined $file_name) {
4845                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4846                 } else {
4847                         $hash = $hash_base;
4848                 }
4849         }
4850         die_error(404, "No such tree") unless defined($hash);
4851         $/ = "\0";
4852         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4853                 or die_error(500, "Open git-ls-tree failed");
4854         my @entries = map { chomp; $_ } <$fd>;
4855         close $fd or die_error(404, "Reading tree failed");
4856         $/ = "\n";
4857
4858         my $refs = git_get_references();
4859         my $ref = format_ref_marker($refs, $hash_base);
4860         git_header_html();
4861         my $basedir = '';
4862         my $have_blame = gitweb_check_feature('blame');
4863         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4864                 my @views_nav = ();
4865                 if (defined $file_name) {
4866                         push @views_nav,
4867                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4868                                         "history"),
4869                                 $cgi->a({-href => href(action=>"tree",
4870                                                        hash_base=>"HEAD", file_name=>$file_name)},
4871                                         "HEAD"),
4872                 }
4873                 my $snapshot_links = format_snapshot_links($hash);
4874                 if (defined $snapshot_links) {
4875                         # FIXME: Should be available when we have no hash base as well.
4876                         push @views_nav, $snapshot_links;
4877                 }
4878                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4879                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4880         } else {
4881                 undef $hash_base;
4882                 print "<div class=\"page_nav\">\n";
4883                 print "<br/><br/></div>\n";
4884                 print "<div class=\"title\">$hash</div>\n";
4885         }
4886         if (defined $file_name) {
4887                 $basedir = $file_name;
4888                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4889                         $basedir .= '/';
4890                 }
4891                 git_print_page_path($file_name, 'tree', $hash_base);
4892         }
4893         print "<div class=\"page_body\">\n";
4894         print "<table class=\"tree\">\n";
4895         my $alternate = 1;
4896         # '..' (top directory) link if possible
4897         if (defined $hash_base &&
4898             defined $file_name && $file_name =~ m![^/]+$!) {
4899                 if ($alternate) {
4900                         print "<tr class=\"dark\">\n";
4901                 } else {
4902                         print "<tr class=\"light\">\n";
4903                 }
4904                 $alternate ^= 1;
4905
4906                 my $up = $file_name;
4907                 $up =~ s!/?[^/]+$!!;
4908                 undef $up unless $up;
4909                 # based on git_print_tree_entry
4910                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4911                 print '<td class="list">';
4912                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4913                                              file_name=>$up)},
4914                               "..");
4915                 print "</td>\n";
4916                 print "<td class=\"link\"></td>\n";
4917
4918                 print "</tr>\n";
4919         }
4920         foreach my $line (@entries) {
4921                 my %t = parse_ls_tree_line($line, -z => 1);
4922
4923                 if ($alternate) {
4924                         print "<tr class=\"dark\">\n";
4925                 } else {
4926                         print "<tr class=\"light\">\n";
4927                 }
4928                 $alternate ^= 1;
4929
4930                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4931
4932                 print "</tr>\n";
4933         }
4934         print "</table>\n" .
4935               "</div>";
4936         git_footer_html();
4937 }
4938
4939 sub git_snapshot {
4940         my $format = $input_params{'snapshot_format'};
4941         if (!@snapshot_fmts) {
4942                 die_error(403, "Snapshots not allowed");
4943         }
4944         # default to first supported snapshot format
4945         $format ||= $snapshot_fmts[0];
4946         if ($format !~ m/^[a-z0-9]+$/) {
4947                 die_error(400, "Invalid snapshot format parameter");
4948         } elsif (!exists($known_snapshot_formats{$format})) {
4949                 die_error(400, "Unknown snapshot format");
4950         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4951                 die_error(403, "Unsupported snapshot format");
4952         }
4953
4954         if (!defined $hash) {
4955                 $hash = git_get_head_hash($project);
4956         }
4957
4958         my $name = $project;
4959         $name =~ s,([^/])/*\.git$,$1,;
4960         $name = basename($name);
4961         my $filename = to_utf8($name);
4962         $name =~ s/\047/\047\\\047\047/g;
4963         my $cmd;
4964         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4965         $cmd = quote_command(
4966                 git_cmd(), 'archive',
4967                 "--format=$known_snapshot_formats{$format}{'format'}",
4968                 "--prefix=$name/", $hash);
4969         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4970                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4971         }
4972
4973         print $cgi->header(
4974                 -type => $known_snapshot_formats{$format}{'type'},
4975                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4976                 -status => '200 OK');
4977
4978         open my $fd, "-|", $cmd
4979                 or die_error(500, "Execute git-archive failed");
4980         binmode STDOUT, ':raw';
4981         print <$fd>;
4982         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4983         close $fd;
4984 }
4985
4986 sub git_log {
4987         my $head = git_get_head_hash($project);
4988         if (!defined $hash) {
4989                 $hash = $head;
4990         }
4991         if (!defined $page) {
4992                 $page = 0;
4993         }
4994         my $refs = git_get_references();
4995
4996         my @commitlist = parse_commits($hash, 101, (100 * $page));
4997
4998         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4999
5000         git_header_html();
5001         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5002
5003         if (!@commitlist) {
5004                 my %co = parse_commit($hash);
5005
5006                 git_print_header_div('summary', $project);
5007                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5008         }
5009         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5010         for (my $i = 0; $i <= $to; $i++) {
5011                 my %co = %{$commitlist[$i]};
5012                 next if !%co;
5013                 my $commit = $co{'id'};
5014                 my $ref = format_ref_marker($refs, $commit);
5015                 my %ad = parse_date($co{'author_epoch'});
5016                 git_print_header_div('commit',
5017                                "<span class=\"age\">$co{'age_string'}</span>" .
5018                                esc_html($co{'title'}) . $ref,
5019                                $commit);
5020                 print "<div class=\"title_text\">\n" .
5021                       "<div class=\"log_link\">\n" .
5022                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5023                       " | " .
5024                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5025                       " | " .
5026                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5027                       "<br/>\n" .
5028                       "</div>\n" .
5029                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5030                       "</div>\n";
5031
5032                 print "<div class=\"log_body\">\n";
5033                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5034                 print "</div>\n";
5035         }
5036         if ($#commitlist >= 100) {
5037                 print "<div class=\"page_nav\">\n";
5038                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5039                                -accesskey => "n", -title => "Alt-n"}, "next");
5040                 print "</div>\n";
5041         }
5042         git_footer_html();
5043 }
5044
5045 sub git_commit {
5046         $hash ||= $hash_base || "HEAD";
5047         my %co = parse_commit($hash)
5048             or die_error(404, "Unknown commit object");
5049         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5050         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5051
5052         my $parent  = $co{'parent'};
5053         my $parents = $co{'parents'}; # listref
5054
5055         # we need to prepare $formats_nav before any parameter munging
5056         my $formats_nav;
5057         if (!defined $parent) {
5058                 # --root commitdiff
5059                 $formats_nav .= '(initial)';
5060         } elsif (@$parents == 1) {
5061                 # single parent commit
5062                 $formats_nav .=
5063                         '(parent: ' .
5064                         $cgi->a({-href => href(action=>"commit",
5065                                                hash=>$parent)},
5066                                 esc_html(substr($parent, 0, 7))) .
5067                         ')';
5068         } else {
5069                 # merge commit
5070                 $formats_nav .=
5071                         '(merge: ' .
5072                         join(' ', map {
5073                                 $cgi->a({-href => href(action=>"commit",
5074                                                        hash=>$_)},
5075                                         esc_html(substr($_, 0, 7)));
5076                         } @$parents ) .
5077                         ')';
5078         }
5079
5080         if (!defined $parent) {
5081                 $parent = "--root";
5082         }
5083         my @difftree;
5084         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5085                 @diff_opts,
5086                 (@$parents <= 1 ? $parent : '-c'),
5087                 $hash, "--"
5088                 or die_error(500, "Open git-diff-tree failed");
5089         @difftree = map { chomp; $_ } <$fd>;
5090         close $fd or die_error(404, "Reading git-diff-tree failed");
5091
5092         # non-textual hash id's can be cached
5093         my $expires;
5094         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5095                 $expires = "+1d";
5096         }
5097         my $refs = git_get_references();
5098         my $ref = format_ref_marker($refs, $co{'id'});
5099
5100         git_header_html(undef, $expires);
5101         git_print_page_nav('commit', '',
5102                            $hash, $co{'tree'}, $hash,
5103                            $formats_nav);
5104
5105         if (defined $co{'parent'}) {
5106                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5107         } else {
5108                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5109         }
5110         print "<div class=\"title_text\">\n" .
5111               "<table class=\"object_header\">\n";
5112         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5113               "<tr>" .
5114               "<td></td><td> $ad{'rfc2822'}";
5115         if ($ad{'hour_local'} < 6) {
5116                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5117                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5118         } else {
5119                 printf(" (%02d:%02d %s)",
5120                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5121         }
5122         print "</td>" .
5123               "</tr>\n";
5124         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5125         print "<tr><td></td><td> $cd{'rfc2822'}" .
5126               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5127               "</td></tr>\n";
5128         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5129         print "<tr>" .
5130               "<td>tree</td>" .
5131               "<td class=\"sha1\">" .
5132               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5133                        class => "list"}, $co{'tree'}) .
5134               "</td>" .
5135               "<td class=\"link\">" .
5136               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5137                       "tree");
5138         my $snapshot_links = format_snapshot_links($hash);
5139         if (defined $snapshot_links) {
5140                 print " | " . $snapshot_links;
5141         }
5142         print "</td>" .
5143               "</tr>\n";
5144
5145         foreach my $par (@$parents) {
5146                 print "<tr>" .
5147                       "<td>parent</td>" .
5148                       "<td class=\"sha1\">" .
5149                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5150                                class => "list"}, $par) .
5151                       "</td>" .
5152                       "<td class=\"link\">" .
5153                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5154                       " | " .
5155                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5156                       "</td>" .
5157                       "</tr>\n";
5158         }
5159         print "</table>".
5160               "</div>\n";
5161
5162         print "<div class=\"page_body\">\n";
5163         git_print_log($co{'comment'});
5164         print "</div>\n";
5165
5166         git_difftree_body(\@difftree, $hash, @$parents);
5167
5168         git_footer_html();
5169 }
5170
5171 sub git_object {
5172         # object is defined by:
5173         # - hash or hash_base alone
5174         # - hash_base and file_name
5175         my $type;
5176
5177         # - hash or hash_base alone
5178         if ($hash || ($hash_base && !defined $file_name)) {
5179                 my $object_id = $hash || $hash_base;
5180
5181                 open my $fd, "-|", quote_command(
5182                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5183                         or die_error(404, "Object does not exist");
5184                 $type = <$fd>;
5185                 chomp $type;
5186                 close $fd
5187                         or die_error(404, "Object does not exist");
5188
5189         # - hash_base and file_name
5190         } elsif ($hash_base && defined $file_name) {
5191                 $file_name =~ s,/+$,,;
5192
5193                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5194                         or die_error(404, "Base object does not exist");
5195
5196                 # here errors should not hapen
5197                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5198                         or die_error(500, "Open git-ls-tree failed");
5199                 my $line = <$fd>;
5200                 close $fd;
5201
5202                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5203                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5204                         die_error(404, "File or directory for given base does not exist");
5205                 }
5206                 $type = $2;
5207                 $hash = $3;
5208         } else {
5209                 die_error(400, "Not enough information to find object");
5210         }
5211
5212         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5213                                           hash=>$hash, hash_base=>$hash_base,
5214                                           file_name=>$file_name),
5215                              -status => '302 Found');
5216 }
5217
5218 sub git_blobdiff {
5219         my $format = shift || 'html';
5220
5221         my $fd;
5222         my @difftree;
5223         my %diffinfo;
5224         my $expires;
5225
5226         # preparing $fd and %diffinfo for git_patchset_body
5227         # new style URI
5228         if (defined $hash_base && defined $hash_parent_base) {
5229                 if (defined $file_name) {
5230                         # read raw output
5231                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5232                                 $hash_parent_base, $hash_base,
5233                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5234                                 or die_error(500, "Open git-diff-tree failed");
5235                         @difftree = map { chomp; $_ } <$fd>;
5236                         close $fd
5237                                 or die_error(404, "Reading git-diff-tree failed");
5238                         @difftree
5239                                 or die_error(404, "Blob diff not found");
5240
5241                 } elsif (defined $hash &&
5242                          $hash =~ /[0-9a-fA-F]{40}/) {
5243                         # try to find filename from $hash
5244
5245                         # read filtered raw output
5246                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5247                                 $hash_parent_base, $hash_base, "--"
5248                                 or die_error(500, "Open git-diff-tree failed");
5249                         @difftree =
5250                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5251                                 # $hash == to_id
5252                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5253                                 map { chomp; $_ } <$fd>;
5254                         close $fd
5255                                 or die_error(404, "Reading git-diff-tree failed");
5256                         @difftree
5257                                 or die_error(404, "Blob diff not found");
5258
5259                 } else {
5260                         die_error(400, "Missing one of the blob diff parameters");
5261                 }
5262
5263                 if (@difftree > 1) {
5264                         die_error(400, "Ambiguous blob diff specification");
5265                 }
5266
5267                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5268                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5269                 $file_name   ||= $diffinfo{'to_file'};
5270
5271                 $hash_parent ||= $diffinfo{'from_id'};
5272                 $hash        ||= $diffinfo{'to_id'};
5273
5274                 # non-textual hash id's can be cached
5275                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5276                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5277                         $expires = '+1d';
5278                 }
5279
5280                 # open patch output
5281                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5282                         '-p', ($format eq 'html' ? "--full-index" : ()),
5283                         $hash_parent_base, $hash_base,
5284                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5285                         or die_error(500, "Open git-diff-tree failed");
5286         }
5287
5288         # old/legacy style URI
5289         if (!%diffinfo && # if new style URI failed
5290             defined $hash && defined $hash_parent) {
5291                 # fake git-diff-tree raw output
5292                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5293                 $diffinfo{'from_id'} = $hash_parent;
5294                 $diffinfo{'to_id'}   = $hash;
5295                 if (defined $file_name) {
5296                         if (defined $file_parent) {
5297                                 $diffinfo{'status'} = '2';
5298                                 $diffinfo{'from_file'} = $file_parent;
5299                                 $diffinfo{'to_file'}   = $file_name;
5300                         } else { # assume not renamed
5301                                 $diffinfo{'status'} = '1';
5302                                 $diffinfo{'from_file'} = $file_name;
5303                                 $diffinfo{'to_file'}   = $file_name;
5304                         }
5305                 } else { # no filename given
5306                         $diffinfo{'status'} = '2';
5307                         $diffinfo{'from_file'} = $hash_parent;
5308                         $diffinfo{'to_file'}   = $hash;
5309                 }
5310
5311                 # non-textual hash id's can be cached
5312                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5313                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5314                         $expires = '+1d';
5315                 }
5316
5317                 # open patch output
5318                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5319                         '-p', ($format eq 'html' ? "--full-index" : ()),
5320                         $hash_parent, $hash, "--"
5321                         or die_error(500, "Open git-diff failed");
5322         } else  {
5323                 die_error(400, "Missing one of the blob diff parameters")
5324                         unless %diffinfo;
5325         }
5326
5327         # header
5328         if ($format eq 'html') {
5329                 my $formats_nav =
5330                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5331                                 "raw");
5332                 git_header_html(undef, $expires);
5333                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5334                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5335                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5336                 } else {
5337                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5338                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5339                 }
5340                 if (defined $file_name) {
5341                         git_print_page_path($file_name, "blob", $hash_base);
5342                 } else {
5343                         print "<div class=\"page_path\"></div>\n";
5344                 }
5345
5346         } elsif ($format eq 'plain') {
5347                 print $cgi->header(
5348                         -type => 'text/plain',
5349                         -charset => 'utf-8',
5350                         -expires => $expires,
5351                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5352
5353                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5354
5355         } else {
5356                 die_error(400, "Unknown blobdiff format");
5357         }
5358
5359         # patch
5360         if ($format eq 'html') {
5361                 print "<div class=\"page_body\">\n";
5362
5363                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5364                 close $fd;
5365
5366                 print "</div>\n"; # class="page_body"
5367                 git_footer_html();
5368
5369         } else {
5370                 while (my $line = <$fd>) {
5371                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5372                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5373
5374                         print $line;
5375
5376                         last if $line =~ m!^\+\+\+!;
5377                 }
5378                 local $/ = undef;
5379                 print <$fd>;
5380                 close $fd;
5381         }
5382 }
5383
5384 sub git_blobdiff_plain {
5385         git_blobdiff('plain');
5386 }
5387
5388 sub git_commitdiff {
5389         my $format = shift || 'html';
5390         $hash ||= $hash_base || "HEAD";
5391         my %co = parse_commit($hash)
5392             or die_error(404, "Unknown commit object");
5393
5394         # choose format for commitdiff for merge
5395         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5396                 $hash_parent = '--cc';
5397         }
5398         # we need to prepare $formats_nav before almost any parameter munging
5399         my $formats_nav;
5400         if ($format eq 'html') {
5401                 $formats_nav =
5402                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5403                                 "raw");
5404
5405                 if (defined $hash_parent &&
5406                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5407                         # commitdiff with two commits given
5408                         my $hash_parent_short = $hash_parent;
5409                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5410                                 $hash_parent_short = substr($hash_parent, 0, 7);
5411                         }
5412                         $formats_nav .=
5413                                 ' (from';
5414                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5415                                 if ($co{'parents'}[$i] eq $hash_parent) {
5416                                         $formats_nav .= ' parent ' . ($i+1);
5417                                         last;
5418                                 }
5419                         }
5420                         $formats_nav .= ': ' .
5421                                 $cgi->a({-href => href(action=>"commitdiff",
5422                                                        hash=>$hash_parent)},
5423                                         esc_html($hash_parent_short)) .
5424                                 ')';
5425                 } elsif (!$co{'parent'}) {
5426                         # --root commitdiff
5427                         $formats_nav .= ' (initial)';
5428                 } elsif (scalar @{$co{'parents'}} == 1) {
5429                         # single parent commit
5430                         $formats_nav .=
5431                                 ' (parent: ' .
5432                                 $cgi->a({-href => href(action=>"commitdiff",
5433                                                        hash=>$co{'parent'})},
5434                                         esc_html(substr($co{'parent'}, 0, 7))) .
5435                                 ')';
5436                 } else {
5437                         # merge commit
5438                         if ($hash_parent eq '--cc') {
5439                                 $formats_nav .= ' | ' .
5440                                         $cgi->a({-href => href(action=>"commitdiff",
5441                                                                hash=>$hash, hash_parent=>'-c')},
5442                                                 'combined');
5443                         } else { # $hash_parent eq '-c'
5444                                 $formats_nav .= ' | ' .
5445                                         $cgi->a({-href => href(action=>"commitdiff",
5446                                                                hash=>$hash, hash_parent=>'--cc')},
5447                                                 'compact');
5448                         }
5449                         $formats_nav .=
5450                                 ' (merge: ' .
5451                                 join(' ', map {
5452                                         $cgi->a({-href => href(action=>"commitdiff",
5453                                                                hash=>$_)},
5454                                                 esc_html(substr($_, 0, 7)));
5455                                 } @{$co{'parents'}} ) .
5456                                 ')';
5457                 }
5458         }
5459
5460         my $hash_parent_param = $hash_parent;
5461         if (!defined $hash_parent_param) {
5462                 # --cc for multiple parents, --root for parentless
5463                 $hash_parent_param =
5464                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5465         }
5466
5467         # read commitdiff
5468         my $fd;
5469         my @difftree;
5470         if ($format eq 'html') {
5471                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5472                         "--no-commit-id", "--patch-with-raw", "--full-index",
5473                         $hash_parent_param, $hash, "--"
5474                         or die_error(500, "Open git-diff-tree failed");
5475
5476                 while (my $line = <$fd>) {
5477                         chomp $line;
5478                         # empty line ends raw part of diff-tree output
5479                         last unless $line;
5480                         push @difftree, scalar parse_difftree_raw_line($line);
5481                 }
5482
5483         } elsif ($format eq 'plain') {
5484                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5485                         '-p', $hash_parent_param, $hash, "--"
5486                         or die_error(500, "Open git-diff-tree failed");
5487
5488         } else {
5489                 die_error(400, "Unknown commitdiff format");
5490         }
5491
5492         # non-textual hash id's can be cached
5493         my $expires;
5494         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5495                 $expires = "+1d";
5496         }
5497
5498         # write commit message
5499         if ($format eq 'html') {
5500                 my $refs = git_get_references();
5501                 my $ref = format_ref_marker($refs, $co{'id'});
5502
5503                 git_header_html(undef, $expires);
5504                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5505                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5506                 git_print_authorship(\%co);
5507                 print "<div class=\"page_body\">\n";
5508                 if (@{$co{'comment'}} > 1) {
5509                         print "<div class=\"log\">\n";
5510                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5511                         print "</div>\n"; # class="log"
5512                 }
5513
5514         } elsif ($format eq 'plain') {
5515                 my $refs = git_get_references("tags");
5516                 my $tagname = git_get_rev_name_tags($hash);
5517                 my $filename = basename($project) . "-$hash.patch";
5518
5519                 print $cgi->header(
5520                         -type => 'text/plain',
5521                         -charset => 'utf-8',
5522                         -expires => $expires,
5523                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5524                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5525                 print "From: " . to_utf8($co{'author'}) . "\n";
5526                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5527                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5528
5529                 print "X-Git-Tag: $tagname\n" if $tagname;
5530                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5531
5532                 foreach my $line (@{$co{'comment'}}) {
5533                         print to_utf8($line) . "\n";
5534                 }
5535                 print "---\n\n";
5536         }
5537
5538         # write patch
5539         if ($format eq 'html') {
5540                 my $use_parents = !defined $hash_parent ||
5541                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5542                 git_difftree_body(\@difftree, $hash,
5543                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5544                 print "<br/>\n";
5545
5546                 git_patchset_body($fd, \@difftree, $hash,
5547                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5548                 close $fd;
5549                 print "</div>\n"; # class="page_body"
5550                 git_footer_html();
5551
5552         } elsif ($format eq 'plain') {
5553                 local $/ = undef;
5554                 print <$fd>;
5555                 close $fd
5556                         or print "Reading git-diff-tree failed\n";
5557         }
5558 }
5559
5560 sub git_commitdiff_plain {
5561         git_commitdiff('plain');
5562 }
5563
5564 sub git_history {
5565         if (!defined $hash_base) {
5566                 $hash_base = git_get_head_hash($project);
5567         }
5568         if (!defined $page) {
5569                 $page = 0;
5570         }
5571         my $ftype;
5572         my %co = parse_commit($hash_base)
5573             or die_error(404, "Unknown commit object");
5574
5575         my $refs = git_get_references();
5576         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5577
5578         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5579                                        $file_name, "--full-history")
5580             or die_error(404, "No such file or directory on given branch");
5581
5582         if (!defined $hash && defined $file_name) {
5583                 # some commits could have deleted file in question,
5584                 # and not have it in tree, but one of them has to have it
5585                 for (my $i = 0; $i <= @commitlist; $i++) {
5586                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5587                         last if defined $hash;
5588                 }
5589         }
5590         if (defined $hash) {
5591                 $ftype = git_get_type($hash);
5592         }
5593         if (!defined $ftype) {
5594                 die_error(500, "Unknown type of object");
5595         }
5596
5597         my $paging_nav = '';
5598         if ($page > 0) {
5599                 $paging_nav .=
5600                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5601                                                file_name=>$file_name)},
5602                                 "first");
5603                 $paging_nav .= " &sdot; " .
5604                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5605                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5606         } else {
5607                 $paging_nav .= "first";
5608                 $paging_nav .= " &sdot; prev";
5609         }
5610         my $next_link = '';
5611         if ($#commitlist >= 100) {
5612                 $next_link =
5613                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5614                                  -accesskey => "n", -title => "Alt-n"}, "next");
5615                 $paging_nav .= " &sdot; $next_link";
5616         } else {
5617                 $paging_nav .= " &sdot; next";
5618         }
5619
5620         git_header_html();
5621         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5622         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5623         git_print_page_path($file_name, $ftype, $hash_base);
5624
5625         git_history_body(\@commitlist, 0, 99,
5626                          $refs, $hash_base, $ftype, $next_link);
5627
5628         git_footer_html();
5629 }
5630
5631 sub git_search {
5632         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5633         if (!defined $searchtext) {
5634                 die_error(400, "Text field is empty");
5635         }
5636         if (!defined $hash) {
5637                 $hash = git_get_head_hash($project);
5638         }
5639         my %co = parse_commit($hash);
5640         if (!%co) {
5641                 die_error(404, "Unknown commit object");
5642         }
5643         if (!defined $page) {
5644                 $page = 0;
5645         }
5646
5647         $searchtype ||= 'commit';
5648         if ($searchtype eq 'pickaxe') {
5649                 # pickaxe may take all resources of your box and run for several minutes
5650                 # with every query - so decide by yourself how public you make this feature
5651                 gitweb_check_feature('pickaxe')
5652                     or die_error(403, "Pickaxe is disabled");
5653         }
5654         if ($searchtype eq 'grep') {
5655                 gitweb_check_feature('grep')
5656                     or die_error(403, "Grep is disabled");
5657         }
5658
5659         git_header_html();
5660
5661         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5662                 my $greptype;
5663                 if ($searchtype eq 'commit') {
5664                         $greptype = "--grep=";
5665                 } elsif ($searchtype eq 'author') {
5666                         $greptype = "--author=";
5667                 } elsif ($searchtype eq 'committer') {
5668                         $greptype = "--committer=";
5669                 }
5670                 $greptype .= $searchtext;
5671                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5672                                                $greptype, '--regexp-ignore-case',
5673                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5674
5675                 my $paging_nav = '';
5676                 if ($page > 0) {
5677                         $paging_nav .=
5678                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5679                                                        searchtext=>$searchtext,
5680                                                        searchtype=>$searchtype)},
5681                                         "first");
5682                         $paging_nav .= " &sdot; " .
5683                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5684                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5685                 } else {
5686                         $paging_nav .= "first";
5687                         $paging_nav .= " &sdot; prev";
5688                 }
5689                 my $next_link = '';
5690                 if ($#commitlist >= 100) {
5691                         $next_link =
5692                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5693                                          -accesskey => "n", -title => "Alt-n"}, "next");
5694                         $paging_nav .= " &sdot; $next_link";
5695                 } else {
5696                         $paging_nav .= " &sdot; next";
5697                 }
5698
5699                 if ($#commitlist >= 100) {
5700                 }
5701
5702                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5703                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5704                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5705         }
5706
5707         if ($searchtype eq 'pickaxe') {
5708                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5709                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5710
5711                 print "<table class=\"pickaxe search\">\n";
5712                 my $alternate = 1;
5713                 $/ = "\n";
5714                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5715                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5716                         ($search_use_regexp ? '--pickaxe-regex' : ());
5717                 undef %co;
5718                 my @files;
5719                 while (my $line = <$fd>) {
5720                         chomp $line;
5721                         next unless $line;
5722
5723                         my %set = parse_difftree_raw_line($line);
5724                         if (defined $set{'commit'}) {
5725                                 # finish previous commit
5726                                 if (%co) {
5727                                         print "</td>\n" .
5728                                               "<td class=\"link\">" .
5729                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5730                                               " | " .
5731                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5732                                         print "</td>\n" .
5733                                               "</tr>\n";
5734                                 }
5735
5736                                 if ($alternate) {
5737                                         print "<tr class=\"dark\">\n";
5738                                 } else {
5739                                         print "<tr class=\"light\">\n";
5740                                 }
5741                                 $alternate ^= 1;
5742                                 %co = parse_commit($set{'commit'});
5743                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5744                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5745                                       "<td><i>$author</i></td>\n" .
5746                                       "<td>" .
5747                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5748                                               -class => "list subject"},
5749                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5750                         } elsif (defined $set{'to_id'}) {
5751                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5752
5753                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5754                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5755                                               -class => "list"},
5756                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5757                                       "<br/>\n";
5758                         }
5759                 }
5760                 close $fd;
5761
5762                 # finish last commit (warning: repetition!)
5763                 if (%co) {
5764                         print "</td>\n" .
5765                               "<td class=\"link\">" .
5766                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5767                               " | " .
5768                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5769                         print "</td>\n" .
5770                               "</tr>\n";
5771                 }
5772
5773                 print "</table>\n";
5774         }
5775
5776         if ($searchtype eq 'grep') {
5777                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5778                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5779
5780                 print "<table class=\"grep_search\">\n";
5781                 my $alternate = 1;
5782                 my $matches = 0;
5783                 $/ = "\n";
5784                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5785                         $search_use_regexp ? ('-E', '-i') : '-F',
5786                         $searchtext, $co{'tree'};
5787                 my $lastfile = '';
5788                 while (my $line = <$fd>) {
5789                         chomp $line;
5790                         my ($file, $lno, $ltext, $binary);
5791                         last if ($matches++ > 1000);
5792                         if ($line =~ /^Binary file (.+) matches$/) {
5793                                 $file = $1;
5794                                 $binary = 1;
5795                         } else {
5796                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5797                         }
5798                         if ($file ne $lastfile) {
5799                                 $lastfile and print "</td></tr>\n";
5800                                 if ($alternate++) {
5801                                         print "<tr class=\"dark\">\n";
5802                                 } else {
5803                                         print "<tr class=\"light\">\n";
5804                                 }
5805                                 print "<td class=\"list\">".
5806                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5807                                                                file_name=>"$file"),
5808                                                 -class => "list"}, esc_path($file));
5809                                 print "</td><td>\n";
5810                                 $lastfile = $file;
5811                         }
5812                         if ($binary) {
5813                                 print "<div class=\"binary\">Binary file</div>\n";
5814                         } else {
5815                                 $ltext = untabify($ltext);
5816                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5817                                         $ltext = esc_html($1, -nbsp=>1);
5818                                         $ltext .= '<span class="match">';
5819                                         $ltext .= esc_html($2, -nbsp=>1);
5820                                         $ltext .= '</span>';
5821                                         $ltext .= esc_html($3, -nbsp=>1);
5822                                 } else {
5823                                         $ltext = esc_html($ltext, -nbsp=>1);
5824                                 }
5825                                 print "<div class=\"pre\">" .
5826                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5827                                                                file_name=>"$file").'#l'.$lno,
5828                                                 -class => "linenr"}, sprintf('%4i', $lno))
5829                                         . ' ' .  $ltext . "</div>\n";
5830                         }
5831                 }
5832                 if ($lastfile) {
5833                         print "</td></tr>\n";
5834                         if ($matches > 1000) {
5835                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5836                         }
5837                 } else {
5838                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5839                 }
5840                 close $fd;
5841
5842                 print "</table>\n";
5843         }
5844         git_footer_html();
5845 }
5846
5847 sub git_search_help {
5848         git_header_html();
5849         git_print_page_nav('','', $hash,$hash,$hash);
5850         print <<EOT;
5851 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5852 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5853 the pattern entered is recognized as the POSIX extended
5854 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5855 insensitive).</p>
5856 <dl>
5857 <dt><b>commit</b></dt>
5858 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5859 EOT
5860         my $have_grep = gitweb_check_feature('grep');
5861         if ($have_grep) {
5862                 print <<EOT;
5863 <dt><b>grep</b></dt>
5864 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5865     a different one) are searched for the given pattern. On large trees, this search can take
5866 a while and put some strain on the server, so please use it with some consideration. Note that
5867 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5868 case-sensitive.</dd>
5869 EOT
5870         }
5871         print <<EOT;
5872 <dt><b>author</b></dt>
5873 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5874 <dt><b>committer</b></dt>
5875 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5876 EOT
5877         my $have_pickaxe = gitweb_check_feature('pickaxe');
5878         if ($have_pickaxe) {
5879                 print <<EOT;
5880 <dt><b>pickaxe</b></dt>
5881 <dd>All commits that caused the string to appear or disappear from any file (changes that
5882 added, removed or "modified" the string) will be listed. This search can take a while and
5883 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5884 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5885 EOT
5886         }
5887         print "</dl>\n";
5888         git_footer_html();
5889 }
5890
5891 sub git_shortlog {
5892         my $head = git_get_head_hash($project);
5893         if (!defined $hash) {
5894                 $hash = $head;
5895         }
5896         if (!defined $page) {
5897                 $page = 0;
5898         }
5899         my $refs = git_get_references();
5900
5901         my $commit_hash = $hash;
5902         if (defined $hash_parent) {
5903                 $commit_hash = "$hash_parent..$hash";
5904         }
5905         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5906
5907         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5908         my $next_link = '';
5909         if ($#commitlist >= 100) {
5910                 $next_link =
5911                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5912                                  -accesskey => "n", -title => "Alt-n"}, "next");
5913         }
5914
5915         git_header_html();
5916         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5917         git_print_header_div('summary', $project);
5918
5919         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5920
5921         git_footer_html();
5922 }
5923
5924 ## ......................................................................
5925 ## feeds (RSS, Atom; OPML)
5926
5927 sub git_feed {
5928         my $format = shift || 'atom';
5929         my $have_blame = gitweb_check_feature('blame');
5930
5931         # Atom: http://www.atomenabled.org/developers/syndication/
5932         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5933         if ($format ne 'rss' && $format ne 'atom') {
5934                 die_error(400, "Unknown web feed format");
5935         }
5936
5937         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5938         my $head = $hash || 'HEAD';
5939         my @commitlist = parse_commits($head, 150, 0, $file_name);
5940
5941         my %latest_commit;
5942         my %latest_date;
5943         my $content_type = "application/$format+xml";
5944         if (defined $cgi->http('HTTP_ACCEPT') &&
5945                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5946                 # browser (feed reader) prefers text/xml
5947                 $content_type = 'text/xml';
5948         }
5949         if (defined($commitlist[0])) {
5950                 %latest_commit = %{$commitlist[0]};
5951                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5952                 print $cgi->header(
5953                         -type => $content_type,
5954                         -charset => 'utf-8',
5955                         -last_modified => $latest_date{'rfc2822'});
5956         } else {
5957                 print $cgi->header(
5958                         -type => $content_type,
5959                         -charset => 'utf-8');
5960         }
5961
5962         # Optimization: skip generating the body if client asks only
5963         # for Last-Modified date.
5964         return if ($cgi->request_method() eq 'HEAD');
5965
5966         # header variables
5967         my $title = "$site_name - $project/$action";
5968         my $feed_type = 'log';
5969         if (defined $hash) {
5970                 $title .= " - '$hash'";
5971                 $feed_type = 'branch log';
5972                 if (defined $file_name) {
5973                         $title .= " :: $file_name";
5974                         $feed_type = 'history';
5975                 }
5976         } elsif (defined $file_name) {
5977                 $title .= " - $file_name";
5978                 $feed_type = 'history';
5979         }
5980         $title .= " $feed_type";
5981         my $descr = git_get_project_description($project);
5982         if (defined $descr) {
5983                 $descr = esc_html($descr);
5984         } else {
5985                 $descr = "$project " .
5986                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5987                          " feed";
5988         }
5989         my $owner = git_get_project_owner($project);
5990         $owner = esc_html($owner);
5991
5992         #header
5993         my $alt_url;
5994         if (defined $file_name) {
5995                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5996         } elsif (defined $hash) {
5997                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5998         } else {
5999                 $alt_url = href(-full=>1, action=>"summary");
6000         }
6001         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6002         if ($format eq 'rss') {
6003                 print <<XML;
6004 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6005 <channel>
6006 XML
6007                 print "<title>$title</title>\n" .
6008                       "<link>$alt_url</link>\n" .
6009                       "<description>$descr</description>\n" .
6010                       "<language>en</language>\n";
6011         } elsif ($format eq 'atom') {
6012                 print <<XML;
6013 <feed xmlns="http://www.w3.org/2005/Atom">
6014 XML
6015                 print "<title>$title</title>\n" .
6016                       "<subtitle>$descr</subtitle>\n" .
6017                       '<link rel="alternate" type="text/html" href="' .
6018                       $alt_url . '" />' . "\n" .
6019                       '<link rel="self" type="' . $content_type . '" href="' .
6020                       $cgi->self_url() . '" />' . "\n" .
6021                       "<id>" . href(-full=>1) . "</id>\n" .
6022                       # use project owner for feed author
6023                       "<author><name>$owner</name></author>\n";
6024                 if (defined $favicon) {
6025                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6026                 }
6027                 if (defined $logo_url) {
6028                         # not twice as wide as tall: 72 x 27 pixels
6029                         print "<logo>" . esc_url($logo) . "</logo>\n";
6030                 }
6031                 if (! %latest_date) {
6032                         # dummy date to keep the feed valid until commits trickle in:
6033                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6034                 } else {
6035                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6036                 }
6037         }
6038
6039         # contents
6040         for (my $i = 0; $i <= $#commitlist; $i++) {
6041                 my %co = %{$commitlist[$i]};
6042                 my $commit = $co{'id'};
6043                 # we read 150, we always show 30 and the ones more recent than 48 hours
6044                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6045                         last;
6046                 }
6047                 my %cd = parse_date($co{'author_epoch'});
6048
6049                 # get list of changed files
6050                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6051                         $co{'parent'} || "--root",
6052                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6053                         or next;
6054                 my @difftree = map { chomp; $_ } <$fd>;
6055                 close $fd
6056                         or next;
6057
6058                 # print element (entry, item)
6059                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6060                 if ($format eq 'rss') {
6061                         print "<item>\n" .
6062                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6063                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6064                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6065                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6066                               "<link>$co_url</link>\n" .
6067                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6068                               "<content:encoded>" .
6069                               "<![CDATA[\n";
6070                 } elsif ($format eq 'atom') {
6071                         print "<entry>\n" .
6072                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6073                               "<updated>$cd{'iso-8601'}</updated>\n" .
6074                               "<author>\n" .
6075                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6076                         if ($co{'author_email'}) {
6077                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6078                         }
6079                         print "</author>\n" .
6080                               # use committer for contributor
6081                               "<contributor>\n" .
6082                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6083                         if ($co{'committer_email'}) {
6084                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6085                         }
6086                         print "</contributor>\n" .
6087                               "<published>$cd{'iso-8601'}</published>\n" .
6088                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6089                               "<id>$co_url</id>\n" .
6090                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6091                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6092                 }
6093                 my $comment = $co{'comment'};
6094                 print "<pre>\n";
6095                 foreach my $line (@$comment) {
6096                         $line = esc_html($line);
6097                         print "$line\n";
6098                 }
6099                 print "</pre><ul>\n";
6100                 foreach my $difftree_line (@difftree) {
6101                         my %difftree = parse_difftree_raw_line($difftree_line);
6102                         next if !$difftree{'from_id'};
6103
6104                         my $file = $difftree{'file'} || $difftree{'to_file'};
6105
6106                         print "<li>" .
6107                               "[" .
6108                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6109                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6110                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6111                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6112                                       -title => "diff"}, 'D');
6113                         if ($have_blame) {
6114                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6115                                                              file_name=>$file, hash_base=>$commit),
6116                                               -title => "blame"}, 'B');
6117                         }
6118                         # if this is not a feed of a file history
6119                         if (!defined $file_name || $file_name ne $file) {
6120                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6121                                                              file_name=>$file, hash=>$commit),
6122                                               -title => "history"}, 'H');
6123                         }
6124                         $file = esc_path($file);
6125                         print "] ".
6126                               "$file</li>\n";
6127                 }
6128                 if ($format eq 'rss') {
6129                         print "</ul>]]>\n" .
6130                               "</content:encoded>\n" .
6131                               "</item>\n";
6132                 } elsif ($format eq 'atom') {
6133                         print "</ul>\n</div>\n" .
6134                               "</content>\n" .
6135                               "</entry>\n";
6136                 }
6137         }
6138
6139         # end of feed
6140         if ($format eq 'rss') {
6141                 print "</channel>\n</rss>\n";
6142         }       elsif ($format eq 'atom') {
6143                 print "</feed>\n";
6144         }
6145 }
6146
6147 sub git_rss {
6148         git_feed('rss');
6149 }
6150
6151 sub git_atom {
6152         git_feed('atom');
6153 }
6154
6155 sub git_opml {
6156         my @list = git_get_projects_list();
6157
6158         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
6159         print <<XML;
6160 <?xml version="1.0" encoding="utf-8"?>
6161 <opml version="1.0">
6162 <head>
6163   <title>$site_name OPML Export</title>
6164 </head>
6165 <body>
6166 <outline text="git RSS feeds">
6167 XML
6168
6169         foreach my $pr (@list) {
6170                 my %proj = %$pr;
6171                 my $head = git_get_head_hash($proj{'path'});
6172                 if (!defined $head) {
6173                         next;
6174                 }
6175                 $git_dir = "$projectroot/$proj{'path'}";
6176                 my %co = parse_commit($head);
6177                 if (!%co) {
6178                         next;
6179                 }
6180
6181                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6182                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
6183                 my $html = "$my_url?p=$proj{'path'};a=summary";
6184                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6185         }
6186         print <<XML;
6187 </outline>
6188 </body>
6189 </opml>
6190 XML
6191 }