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' => sub { feature_bool('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' => sub { feature_bool('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' => sub { feature_bool('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         # The maximum number of patches in a patchset generated in patch
 335         # view. Set this to 0 or undef to disable patch view, or to a
 336         # negative number to remove any limit.
 337
 338         # To disable system wide have in $GITWEB_CONFIG
 339         # $feature{'patches'}{'default'} = [0];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'patches'}{'override'} = 1;
 342         # and in project config gitweb.patches = 0|n;
 343         # where n is the maximum number of patches allowed in a patchset.
 344         'patches' => {
 345                 'sub' => \&feature_patches,
 346                 'override' => 0,
 347                 'default' => [16]},
 348 );
 349
 350 sub gitweb_get_feature {
 351         my ($name) = @_;
 352         return unless exists $feature{$name};
 353         my ($sub, $override, @defaults) = (
 354                 $feature{$name}{'sub'},
 355                 $feature{$name}{'override'},
 356                 @{$feature{$name}{'default'}});
 357         if (!$override) { return @defaults; }
 358         if (!defined $sub) {
 359                 warn "feature $name is not overrideable";
 360                 return @defaults;
 361         }
 362         return $sub->(@defaults);
 363 }
 364
 365 # A wrapper to check if a given feature is enabled.
 366 # With this, you can say
 367 #
 368 #   my $bool_feat = gitweb_check_feature('bool_feat');
 369 #   gitweb_check_feature('bool_feat') or somecode;
 370 #
 371 # instead of
 372 #
 373 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 374 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 375 #
 376 sub gitweb_check_feature {
 377         return (gitweb_get_feature(@_))[0];
 378 }
 379
 380
 381 sub feature_bool {
 382         my $key = shift;
 383         my ($val) = git_get_project_config($key, '--bool');
 384
 385         if ($val eq 'true') {
 386                 return (1);
 387         } elsif ($val eq 'false') {
 388                 return (0);
 389         }
 390
 391         return ($_[0]);
 392 }
 393
 394 sub feature_snapshot {
 395         my (@fmts) = @_;
 396
 397         my ($val) = git_get_project_config('snapshot');
 398
 399         if ($val) {
 400                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 401         }
 402
 403         return @fmts;
 404 }
 405
 406 sub feature_patches {
 407         my @val = (git_get_project_config('patches', '--int'));
 408
 409         if (@val) {
 410                 return @val;
 411         }
 412
 413         return ($_[0]);
 414 }
 415
 416 # checking HEAD file with -e is fragile if the repository was
 417 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 418 # and then pruned.
 419 sub check_head_link {
 420         my ($dir) = @_;
 421         my $headfile = "$dir/HEAD";
 422         return ((-e $headfile) ||
 423                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 424 }
 425
 426 sub check_export_ok {
 427         my ($dir) = @_;
 428         return (check_head_link($dir) &&
 429                 (!$export_ok || -e "$dir/$export_ok") &&
 430                 (!$export_auth_hook || $export_auth_hook->($dir)));
 431 }
 432
 433 # process alternate names for backward compatibility
 434 # filter out unsupported (unknown) snapshot formats
 435 sub filter_snapshot_fmts {
 436         my @fmts = @_;
 437
 438         @fmts = map {
 439                 exists $known_snapshot_format_aliases{$_} ?
 440                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 441         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 442
 443 }
 444
 445 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 446 if (-e $GITWEB_CONFIG) {
 447         do $GITWEB_CONFIG;
 448 } else {
 449         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 450         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 451 }
 452
 453 # version of the core git binary
 454 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 455
 456 $projects_list ||= $projectroot;
 457
 458 # ======================================================================
 459 # input validation and dispatch
 460
 461 # input parameters can be collected from a variety of sources (presently, CGI
 462 # and PATH_INFO), so we define an %input_params hash that collects them all
 463 # together during validation: this allows subsequent uses (e.g. href()) to be
 464 # agnostic of the parameter origin
 465
 466 our %input_params = ();
 467
 468 # input parameters are stored with the long parameter name as key. This will
 469 # also be used in the href subroutine to convert parameters to their CGI
 470 # equivalent, and since the href() usage is the most frequent one, we store
 471 # the name -> CGI key mapping here, instead of the reverse.
 472 #
 473 # XXX: Warning: If you touch this, check the search form for updating,
 474 # too.
 475
 476 our @cgi_param_mapping = (
 477         project => "p",
 478         action => "a",
 479         file_name => "f",
 480         file_parent => "fp",
 481         hash => "h",
 482         hash_parent => "hp",
 483         hash_base => "hb",
 484         hash_parent_base => "hpb",
 485         page => "pg",
 486         order => "o",
 487         searchtext => "s",
 488         searchtype => "st",
 489         snapshot_format => "sf",
 490         extra_options => "opt",
 491         search_use_regexp => "sr",
 492 );
 493 our %cgi_param_mapping = @cgi_param_mapping;
 494
 495 # we will also need to know the possible actions, for validation
 496 our %actions = (
 497         "blame" => \&git_blame,
 498         "blobdiff" => \&git_blobdiff,
 499         "blobdiff_plain" => \&git_blobdiff_plain,
 500         "blob" => \&git_blob,
 501         "blob_plain" => \&git_blob_plain,
 502         "commitdiff" => \&git_commitdiff,
 503         "commitdiff_plain" => \&git_commitdiff_plain,
 504         "commit" => \&git_commit,
 505         "forks" => \&git_forks,
 506         "heads" => \&git_heads,
 507         "history" => \&git_history,
 508         "log" => \&git_log,
 509         "patch" => \&git_patch,
 510         "patches" => \&git_patches,
 511         "rss" => \&git_rss,
 512         "atom" => \&git_atom,
 513         "search" => \&git_search,
 514         "search_help" => \&git_search_help,
 515         "shortlog" => \&git_shortlog,
 516         "summary" => \&git_summary,
 517         "tag" => \&git_tag,
 518         "tags" => \&git_tags,
 519         "tree" => \&git_tree,
 520         "snapshot" => \&git_snapshot,
 521         "object" => \&git_object,
 522         # those below don't need $project
 523         "opml" => \&git_opml,
 524         "project_list" => \&git_project_list,
 525         "project_index" => \&git_project_index,
 526 );
 527
 528 # finally, we have the hash of allowed extra_options for the commands that
 529 # allow them
 530 our %allowed_options = (
 531         "--no-merges" => [ qw(rss atom log shortlog history) ],
 532 );
 533
 534 # fill %input_params with the CGI parameters. All values except for 'opt'
 535 # should be single values, but opt can be an array. We should probably
 536 # build an array of parameters that can be multi-valued, but since for the time
 537 # being it's only this one, we just single it out
 538 while (my ($name, $symbol) = each %cgi_param_mapping) {
 539         if ($symbol eq 'opt') {
 540                 $input_params{$name} = [ $cgi->param($symbol) ];
 541         } else {
 542                 $input_params{$name} = $cgi->param($symbol);
 543         }
 544 }
 545
 546 # now read PATH_INFO and update the parameter list for missing parameters
 547 sub evaluate_path_info {
 548         return if defined $input_params{'project'};
 549         return if !$path_info;
 550         $path_info =~ s,^/+,,;
 551         return if !$path_info;
 552
 553         # find which part of PATH_INFO is project
 554         my $project = $path_info;
 555         $project =~ s,/+$,,;
 556         while ($project && !check_head_link("$projectroot/$project")) {
 557                 $project =~ s,/*[^/]*$,,;
 558         }
 559         return unless $project;
 560         $input_params{'project'} = $project;
 561
 562         # do not change any parameters if an action is given using the query string
 563         return if $input_params{'action'};
 564         $path_info =~ s,^\Q$project\E/*,,;
 565
 566         # next, check if we have an action
 567         my $action = $path_info;
 568         $action =~ s,/.*$,,;
 569         if (exists $actions{$action}) {
 570                 $path_info =~ s,^$action/*,,;
 571                 $input_params{'action'} = $action;
 572         }
 573
 574         # list of actions that want hash_base instead of hash, but can have no
 575         # pathname (f) parameter
 576         my @wants_base = (
 577                 'tree',
 578                 'history',
 579         );
 580
 581         # we want to catch
 582         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 583         my ($parentrefname, $parentpathname, $refname, $pathname) =
 584                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 585
 586         # first, analyze the 'current' part
 587         if (defined $pathname) {
 588                 # we got "branch:filename" or "branch:dir/"
 589                 # we could use git_get_type(branch:pathname), but:
 590                 # - it needs $git_dir
 591                 # - it does a git() call
 592                 # - the convention of terminating directories with a slash
 593                 #   makes it superfluous
 594                 # - embedding the action in the PATH_INFO would make it even
 595                 #   more superfluous
 596                 $pathname =~ s,^/+,,;
 597                 if (!$pathname || substr($pathname, -1) eq "/") {
 598                         $input_params{'action'} ||= "tree";
 599                         $pathname =~ s,/$,,;
 600                 } else {
 601                         # the default action depends on whether we had parent info
 602                         # or not
 603                         if ($parentrefname) {
 604                                 $input_params{'action'} ||= "blobdiff_plain";
 605                         } else {
 606                                 $input_params{'action'} ||= "blob_plain";
 607                         }
 608                 }
 609                 $input_params{'hash_base'} ||= $refname;
 610                 $input_params{'file_name'} ||= $pathname;
 611         } elsif (defined $refname) {
 612                 # we got "branch". In this case we have to choose if we have to
 613                 # set hash or hash_base.
 614                 #
 615                 # Most of the actions without a pathname only want hash to be
 616                 # set, except for the ones specified in @wants_base that want
 617                 # hash_base instead. It should also be noted that hand-crafted
 618                 # links having 'history' as an action and no pathname or hash
 619                 # set will fail, but that happens regardless of PATH_INFO.
 620                 $input_params{'action'} ||= "shortlog";
 621                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 622                         $input_params{'hash_base'} ||= $refname;
 623                 } else {
 624                         $input_params{'hash'} ||= $refname;
 625                 }
 626         }
 627
 628         # next, handle the 'parent' part, if present
 629         if (defined $parentrefname) {
 630                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 631                 # someproject/blobdiff/oldrev..newrev:/filename
 632                 if ($parentpathname) {
 633                         $parentpathname =~ s,^/+,,;
 634                         $parentpathname =~ s,/$,,;
 635                         $input_params{'file_parent'} ||= $parentpathname;
 636                 } else {
 637                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 638                 }
 639                 # we assume that hash_parent_base is wanted if a path was specified,
 640                 # or if the action wants hash_base instead of hash
 641                 if (defined $input_params{'file_parent'} ||
 642                         grep { $_ eq $input_params{'action'} } @wants_base) {
 643                         $input_params{'hash_parent_base'} ||= $parentrefname;
 644                 } else {
 645                         $input_params{'hash_parent'} ||= $parentrefname;
 646                 }
 647         }
 648
 649         # for the snapshot action, we allow URLs in the form
 650         # $project/snapshot/$hash.ext
 651         # where .ext determines the snapshot and gets removed from the
 652         # passed $refname to provide the $hash.
 653         #
 654         # To be able to tell that $refname includes the format extension, we
 655         # require the following two conditions to be satisfied:
 656         # - the hash input parameter MUST have been set from the $refname part
 657         #   of the URL (i.e. they must be equal)
 658         # - the snapshot format MUST NOT have been defined already (e.g. from
 659         #   CGI parameter sf)
 660         # It's also useless to try any matching unless $refname has a dot,
 661         # so we check for that too
 662         if (defined $input_params{'action'} &&
 663                 $input_params{'action'} eq 'snapshot' &&
 664                 defined $refname && index($refname, '.') != -1 &&
 665                 $refname eq $input_params{'hash'} &&
 666                 !defined $input_params{'snapshot_format'}) {
 667                 # We loop over the known snapshot formats, checking for
 668                 # extensions. Allowed extensions are both the defined suffix
 669                 # (which includes the initial dot already) and the snapshot
 670                 # format key itself, with a prepended dot
 671                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 672                         my $hash = $refname;
 673                         my $sfx;
 674                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 675                         next unless $sfx = $1;
 676                         # a valid suffix was found, so set the snapshot format
 677                         # and reset the hash parameter
 678                         $input_params{'snapshot_format'} = $fmt;
 679                         $input_params{'hash'} = $hash;
 680                         # we also set the format suffix to the one requested
 681                         # in the URL: this way a request for e.g. .tgz returns
 682                         # a .tgz instead of a .tar.gz
 683                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 684                         last;
 685                 }
 686         }
 687 }
 688 evaluate_path_info();
 689
 690 our $action = $input_params{'action'};
 691 if (defined $action) {
 692         if (!validate_action($action)) {
 693                 die_error(400, "Invalid action parameter");
 694         }
 695 }
 696
 697 # parameters which are pathnames
 698 our $project = $input_params{'project'};
 699 if (defined $project) {
 700         if (!validate_project($project)) {
 701                 undef $project;
 702                 die_error(404, "No such project");
 703         }
 704 }
 705
 706 our $file_name = $input_params{'file_name'};
 707 if (defined $file_name) {
 708         if (!validate_pathname($file_name)) {
 709                 die_error(400, "Invalid file parameter");
 710         }
 711 }
 712
 713 our $file_parent = $input_params{'file_parent'};
 714 if (defined $file_parent) {
 715         if (!validate_pathname($file_parent)) {
 716                 die_error(400, "Invalid file parent parameter");
 717         }
 718 }
 719
 720 # parameters which are refnames
 721 our $hash = $input_params{'hash'};
 722 if (defined $hash) {
 723         if (!validate_refname($hash)) {
 724                 die_error(400, "Invalid hash parameter");
 725         }
 726 }
 727
 728 our $hash_parent = $input_params{'hash_parent'};
 729 if (defined $hash_parent) {
 730         if (!validate_refname($hash_parent)) {
 731                 die_error(400, "Invalid hash parent parameter");
 732         }
 733 }
 734
 735 our $hash_base = $input_params{'hash_base'};
 736 if (defined $hash_base) {
 737         if (!validate_refname($hash_base)) {
 738                 die_error(400, "Invalid hash base parameter");
 739         }
 740 }
 741
 742 our @extra_options = @{$input_params{'extra_options'}};
 743 # @extra_options is always defined, since it can only be (currently) set from
 744 # CGI, and $cgi->param() returns the empty array in array context if the param
 745 # is not set
 746 foreach my $opt (@extra_options) {
 747         if (not exists $allowed_options{$opt}) {
 748                 die_error(400, "Invalid option parameter");
 749         }
 750         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 751                 die_error(400, "Invalid option parameter for this action");
 752         }
 753 }
 754
 755 our $hash_parent_base = $input_params{'hash_parent_base'};
 756 if (defined $hash_parent_base) {
 757         if (!validate_refname($hash_parent_base)) {
 758                 die_error(400, "Invalid hash parent base parameter");
 759         }
 760 }
 761
 762 # other parameters
 763 our $page = $input_params{'page'};
 764 if (defined $page) {
 765         if ($page =~ m/[^0-9]/) {
 766                 die_error(400, "Invalid page parameter");
 767         }
 768 }
 769
 770 our $searchtype = $input_params{'searchtype'};
 771 if (defined $searchtype) {
 772         if ($searchtype =~ m/[^a-z]/) {
 773                 die_error(400, "Invalid searchtype parameter");
 774         }
 775 }
 776
 777 our $search_use_regexp = $input_params{'search_use_regexp'};
 778
 779 our $searchtext = $input_params{'searchtext'};
 780 our $search_regexp;
 781 if (defined $searchtext) {
 782         if (length($searchtext) < 2) {
 783                 die_error(403, "At least two characters are required for search parameter");
 784         }
 785         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 786 }
 787
 788 # path to the current git repository
 789 our $git_dir;
 790 $git_dir = "$projectroot/$project" if $project;
 791
 792 # list of supported snapshot formats
 793 our @snapshot_fmts = gitweb_get_feature('snapshot');
 794 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 795
 796 # dispatch
 797 if (!defined $action) {
 798         if (defined $hash) {
 799                 $action = git_get_type($hash);
 800         } elsif (defined $hash_base && defined $file_name) {
 801                 $action = git_get_type("$hash_base:$file_name");
 802         } elsif (defined $project) {
 803                 $action = 'summary';
 804         } else {
 805                 $action = 'project_list';
 806         }
 807 }
 808 if (!defined($actions{$action})) {
 809         die_error(400, "Unknown action");
 810 }
 811 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 812     !$project) {
 813         die_error(400, "Project needed");
 814 }
 815 $actions{$action}->();
 816 exit;
 817
 818 ## ======================================================================
 819 ## action links
 820
 821 sub href (%) {
 822         my %params = @_;
 823         # default is to use -absolute url() i.e. $my_uri
 824         my $href = $params{-full} ? $my_url : $my_uri;
 825
 826         $params{'project'} = $project unless exists $params{'project'};
 827
 828         if ($params{-replay}) {
 829                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                         if (!exists $params{$name}) {
 831                                 $params{$name} = $input_params{$name};
 832                         }
 833                 }
 834         }
 835
 836         my $use_pathinfo = gitweb_check_feature('pathinfo');
 837         if ($use_pathinfo and defined $params{'project'}) {
 838                 # try to put as many parameters as possible in PATH_INFO:
 839                 #   - project name
 840                 #   - action
 841                 #   - hash_parent or hash_parent_base:/file_parent
 842                 #   - hash or hash_base:/filename
 843                 #   - the snapshot_format as an appropriate suffix
 844
 845                 # When the script is the root DirectoryIndex for the domain,
 846                 # $href here would be something like http://gitweb.example.com/
 847                 # Thus, we strip any trailing / from $href, to spare us double
 848                 # slashes in the final URL
 849                 $href =~ s,/$,,;
 850
 851                 # Then add the project name, if present
 852                 $href .= "/".esc_url($params{'project'});
 853                 delete $params{'project'};
 854
 855                 # since we destructively absorb parameters, we keep this
 856                 # boolean that remembers if we're handling a snapshot
 857                 my $is_snapshot = $params{'action'} eq 'snapshot';
 858
 859                 # Summary just uses the project path URL, any other action is
 860                 # added to the URL
 861                 if (defined $params{'action'}) {
 862                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 863                         delete $params{'action'};
 864                 }
 865
 866                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 867                 # stripping nonexistent or useless pieces
 868                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 869                         || $params{'hash_parent'} || $params{'hash'});
 870                 if (defined $params{'hash_base'}) {
 871                         if (defined $params{'hash_parent_base'}) {
 872                                 $href .= esc_url($params{'hash_parent_base'});
 873                                 # skip the file_parent if it's the same as the file_name
 874                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 875                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 876                                         $href .= ":/".esc_url($params{'file_parent'});
 877                                         delete $params{'file_parent'};
 878                                 }
 879                                 $href .= "..";
 880                                 delete $params{'hash_parent'};
 881                                 delete $params{'hash_parent_base'};
 882                         } elsif (defined $params{'hash_parent'}) {
 883                                 $href .= esc_url($params{'hash_parent'}). "..";
 884                                 delete $params{'hash_parent'};
 885                         }
 886
 887                         $href .= esc_url($params{'hash_base'});
 888                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 889                                 $href .= ":/".esc_url($params{'file_name'});
 890                                 delete $params{'file_name'};
 891                         }
 892                         delete $params{'hash'};
 893                         delete $params{'hash_base'};
 894                 } elsif (defined $params{'hash'}) {
 895                         $href .= esc_url($params{'hash'});
 896                         delete $params{'hash'};
 897                 }
 898
 899                 # If the action was a snapshot, we can absorb the
 900                 # snapshot_format parameter too
 901                 if ($is_snapshot) {
 902                         my $fmt = $params{'snapshot_format'};
 903                         # snapshot_format should always be defined when href()
 904                         # is called, but just in case some code forgets, we
 905                         # fall back to the default
 906                         $fmt ||= $snapshot_fmts[0];
 907                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 908                         delete $params{'snapshot_format'};
 909                 }
 910         }
 911
 912         # now encode the parameters explicitly
 913         my @result = ();
 914         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 915                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 916                 if (defined $params{$name}) {
 917                         if (ref($params{$name}) eq "ARRAY") {
 918                                 foreach my $par (@{$params{$name}}) {
 919                                         push @result, $symbol . "=" . esc_param($par);
 920                                 }
 921                         } else {
 922                                 push @result, $symbol . "=" . esc_param($params{$name});
 923                         }
 924                 }
 925         }
 926         $href .= "?" . join(';', @result) if scalar @result;
 927
 928         return $href;
 929 }
 930
 931
 932 ## ======================================================================
 933 ## validation, quoting/unquoting and escaping
 934
 935 sub validate_action {
 936         my $input = shift || return undef;
 937         return undef unless exists $actions{$input};
 938         return $input;
 939 }
 940
 941 sub validate_project {
 942         my $input = shift || return undef;
 943         if (!validate_pathname($input) ||
 944                 !(-d "$projectroot/$input") ||
 945                 !check_export_ok("$projectroot/$input") ||
 946                 ($strict_export && !project_in_list($input))) {
 947                 return undef;
 948         } else {
 949                 return $input;
 950         }
 951 }
 952
 953 sub validate_pathname {
 954         my $input = shift || return undef;
 955
 956         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 957         # at the beginning, at the end, and between slashes.
 958         # also this catches doubled slashes
 959         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 960                 return undef;
 961         }
 962         # no null characters
 963         if ($input =~ m!\0!) {
 964                 return undef;
 965         }
 966         return $input;
 967 }
 968
 969 sub validate_refname {
 970         my $input = shift || return undef;
 971
 972         # textual hashes are O.K.
 973         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 974                 return $input;
 975         }
 976         # it must be correct pathname
 977         $input = validate_pathname($input)
 978                 or return undef;
 979         # restrictions on ref name according to git-check-ref-format
 980         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 981                 return undef;
 982         }
 983         return $input;
 984 }
 985
 986 # decode sequences of octets in utf8 into Perl's internal form,
 987 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 988 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 989 sub to_utf8 {
 990         my $str = shift;
 991         if (utf8::valid($str)) {
 992                 utf8::decode($str);
 993                 return $str;
 994         } else {
 995                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 996         }
 997 }
 998
 999 # quote unsafe chars, but keep the slash, even when it's not
1000 # correct, but quoted slashes look too horrible in bookmarks
1001 sub esc_param {
1002         my $str = shift;
1003         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1004         $str =~ s/\+/%2B/g;
1005         $str =~ s/ /\+/g;
1006         return $str;
1007 }
1008
1009 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1010 sub esc_url {
1011         my $str = shift;
1012         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1013         $str =~ s/\+/%2B/g;
1014         $str =~ s/ /\+/g;
1015         return $str;
1016 }
1017
1018 # replace invalid utf8 character with SUBSTITUTION sequence
1019 sub esc_html ($;%) {
1020         my $str = shift;
1021         my %opts = @_;
1022
1023         $str = to_utf8($str);
1024         $str = $cgi->escapeHTML($str);
1025         if ($opts{'-nbsp'}) {
1026                 $str =~ s/ /&nbsp;/g;
1027         }
1028         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1029         return $str;
1030 }
1031
1032 # quote control characters and escape filename to HTML
1033 sub esc_path {
1034         my $str = shift;
1035         my %opts = @_;
1036
1037         $str = to_utf8($str);
1038         $str = $cgi->escapeHTML($str);
1039         if ($opts{'-nbsp'}) {
1040                 $str =~ s/ /&nbsp;/g;
1041         }
1042         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1043         return $str;
1044 }
1045
1046 # Make control characters "printable", using character escape codes (CEC)
1047 sub quot_cec {
1048         my $cntrl = shift;
1049         my %opts = @_;
1050         my %es = ( # character escape codes, aka escape sequences
1051                 "\t" => '\t',   # tab            (HT)
1052                 "\n" => '\n',   # line feed      (LF)
1053                 "\r" => '\r',   # carrige return (CR)
1054                 "\f" => '\f',   # form feed      (FF)
1055                 "\b" => '\b',   # backspace      (BS)
1056                 "\a" => '\a',   # alarm (bell)   (BEL)
1057                 "\e" => '\e',   # escape         (ESC)
1058                 "\013" => '\v', # vertical tab   (VT)
1059                 "\000" => '\0', # nul character  (NUL)
1060         );
1061         my $chr = ( (exists $es{$cntrl})
1062                     ? $es{$cntrl}
1063                     : sprintf('\%2x', ord($cntrl)) );
1064         if ($opts{-nohtml}) {
1065                 return $chr;
1066         } else {
1067                 return "<span class=\"cntrl\">$chr</span>";
1068         }
1069 }
1070
1071 # Alternatively use unicode control pictures codepoints,
1072 # Unicode "printable representation" (PR)
1073 sub quot_upr {
1074         my $cntrl = shift;
1075         my %opts = @_;
1076
1077         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1078         if ($opts{-nohtml}) {
1079                 return $chr;
1080         } else {
1081                 return "<span class=\"cntrl\">$chr</span>";
1082         }
1083 }
1084
1085 # git may return quoted and escaped filenames
1086 sub unquote {
1087         my $str = shift;
1088
1089         sub unq {
1090                 my $seq = shift;
1091                 my %es = ( # character escape codes, aka escape sequences
1092                         't' => "\t",   # tab            (HT, TAB)
1093                         'n' => "\n",   # newline        (NL)
1094                         'r' => "\r",   # return         (CR)
1095                         'f' => "\f",   # form feed      (FF)
1096                         'b' => "\b",   # backspace      (BS)
1097                         'a' => "\a",   # alarm (bell)   (BEL)
1098                         'e' => "\e",   # escape         (ESC)
1099                         'v' => "\013", # vertical tab   (VT)
1100                 );
1101
1102                 if ($seq =~ m/^[0-7]{1,3}$/) {
1103                         # octal char sequence
1104                         return chr(oct($seq));
1105                 } elsif (exists $es{$seq}) {
1106                         # C escape sequence, aka character escape code
1107                         return $es{$seq};
1108                 }
1109                 # quoted ordinary character
1110                 return $seq;
1111         }
1112
1113         if ($str =~ m/^"(.*)"$/) {
1114                 # needs unquoting
1115                 $str = $1;
1116                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1117         }
1118         return $str;
1119 }
1120
1121 # escape tabs (convert tabs to spaces)
1122 sub untabify {
1123         my $line = shift;
1124
1125         while ((my $pos = index($line, "\t")) != -1) {
1126                 if (my $count = (8 - ($pos % 8))) {
1127                         my $spaces = ' ' x $count;
1128                         $line =~ s/\t/$spaces/;
1129                 }
1130         }
1131
1132         return $line;
1133 }
1134
1135 sub project_in_list {
1136         my $project = shift;
1137         my @list = git_get_projects_list();
1138         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1139 }
1140
1141 ## ----------------------------------------------------------------------
1142 ## HTML aware string manipulation
1143
1144 # Try to chop given string on a word boundary between position
1145 # $len and $len+$add_len. If there is no word boundary there,
1146 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1147 # (marking chopped part) would be longer than given string.
1148 sub chop_str {
1149         my $str = shift;
1150         my $len = shift;
1151         my $add_len = shift || 10;
1152         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1153
1154         # Make sure perl knows it is utf8 encoded so we don't
1155         # cut in the middle of a utf8 multibyte char.
1156         $str = to_utf8($str);
1157
1158         # allow only $len chars, but don't cut a word if it would fit in $add_len
1159         # if it doesn't fit, cut it if it's still longer than the dots we would add
1160         # remove chopped character entities entirely
1161
1162         # when chopping in the middle, distribute $len into left and right part
1163         # return early if chopping wouldn't make string shorter
1164         if ($where eq 'center') {
1165                 return $str if ($len + 5 >= length($str)); # filler is length 5
1166                 $len = int($len/2);
1167         } else {
1168                 return $str if ($len + 4 >= length($str)); # filler is length 4
1169         }
1170
1171         # regexps: ending and beginning with word part up to $add_len
1172         my $endre = qr/.{$len}\w{0,$add_len}/;
1173         my $begre = qr/\w{0,$add_len}.{$len}/;
1174
1175         if ($where eq 'left') {
1176                 $str =~ m/^(.*?)($begre)$/;
1177                 my ($lead, $body) = ($1, $2);
1178                 if (length($lead) > 4) {
1179                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1180                         $lead = " ...";
1181                 }
1182                 return "$lead$body";
1183
1184         } elsif ($where eq 'center') {
1185                 $str =~ m/^($endre)(.*)$/;
1186                 my ($left, $str)  = ($1, $2);
1187                 $str =~ m/^(.*?)($begre)$/;
1188                 my ($mid, $right) = ($1, $2);
1189                 if (length($mid) > 5) {
1190                         $left  =~ s/&[^;]*$//;
1191                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1192                         $mid = " ... ";
1193                 }
1194                 return "$left$mid$right";
1195
1196         } else {
1197                 $str =~ m/^($endre)(.*)$/;
1198                 my $body = $1;
1199                 my $tail = $2;
1200                 if (length($tail) > 4) {
1201                         $body =~ s/&[^;]*$//;
1202                         $tail = "... ";
1203                 }
1204                 return "$body$tail";
1205         }
1206 }
1207
1208 # takes the same arguments as chop_str, but also wraps a <span> around the
1209 # result with a title attribute if it does get chopped. Additionally, the
1210 # string is HTML-escaped.
1211 sub chop_and_escape_str {
1212         my ($str) = @_;
1213
1214         my $chopped = chop_str(@_);
1215         if ($chopped eq $str) {
1216                 return esc_html($chopped);
1217         } else {
1218                 $str =~ s/([[:cntrl:]])/?/g;
1219                 return $cgi->span({-title=>$str}, esc_html($chopped));
1220         }
1221 }
1222
1223 ## ----------------------------------------------------------------------
1224 ## functions returning short strings
1225
1226 # CSS class for given age value (in seconds)
1227 sub age_class {
1228         my $age = shift;
1229
1230         if (!defined $age) {
1231                 return "noage";
1232         } elsif ($age < 60*60*2) {
1233                 return "age0";
1234         } elsif ($age < 60*60*24*2) {
1235                 return "age1";
1236         } else {
1237                 return "age2";
1238         }
1239 }
1240
1241 # convert age in seconds to "nn units ago" string
1242 sub age_string {
1243         my $age = shift;
1244         my $age_str;
1245
1246         if ($age > 60*60*24*365*2) {
1247                 $age_str = (int $age/60/60/24/365);
1248                 $age_str .= " years ago";
1249         } elsif ($age > 60*60*24*(365/12)*2) {
1250                 $age_str = int $age/60/60/24/(365/12);
1251                 $age_str .= " months ago";
1252         } elsif ($age > 60*60*24*7*2) {
1253                 $age_str = int $age/60/60/24/7;
1254                 $age_str .= " weeks ago";
1255         } elsif ($age > 60*60*24*2) {
1256                 $age_str = int $age/60/60/24;
1257                 $age_str .= " days ago";
1258         } elsif ($age > 60*60*2) {
1259                 $age_str = int $age/60/60;
1260                 $age_str .= " hours ago";
1261         } elsif ($age > 60*2) {
1262                 $age_str = int $age/60;
1263                 $age_str .= " min ago";
1264         } elsif ($age > 2) {
1265                 $age_str = int $age;
1266                 $age_str .= " sec ago";
1267         } else {
1268                 $age_str .= " right now";
1269         }
1270         return $age_str;
1271 }
1272
1273 use constant {
1274         S_IFINVALID => 0030000,
1275         S_IFGITLINK => 0160000,
1276 };
1277
1278 # submodule/subproject, a commit object reference
1279 sub S_ISGITLINK($) {
1280         my $mode = shift;
1281
1282         return (($mode & S_IFMT) == S_IFGITLINK)
1283 }
1284
1285 # convert file mode in octal to symbolic file mode string
1286 sub mode_str {
1287         my $mode = oct shift;
1288
1289         if (S_ISGITLINK($mode)) {
1290                 return 'm---------';
1291         } elsif (S_ISDIR($mode & S_IFMT)) {
1292                 return 'drwxr-xr-x';
1293         } elsif (S_ISLNK($mode)) {
1294                 return 'lrwxrwxrwx';
1295         } elsif (S_ISREG($mode)) {
1296                 # git cares only about the executable bit
1297                 if ($mode & S_IXUSR) {
1298                         return '-rwxr-xr-x';
1299                 } else {
1300                         return '-rw-r--r--';
1301                 };
1302         } else {
1303                 return '----------';
1304         }
1305 }
1306
1307 # convert file mode in octal to file type string
1308 sub file_type {
1309         my $mode = shift;
1310
1311         if ($mode !~ m/^[0-7]+$/) {
1312                 return $mode;
1313         } else {
1314                 $mode = oct $mode;
1315         }
1316
1317         if (S_ISGITLINK($mode)) {
1318                 return "submodule";
1319         } elsif (S_ISDIR($mode & S_IFMT)) {
1320                 return "directory";
1321         } elsif (S_ISLNK($mode)) {
1322                 return "symlink";
1323         } elsif (S_ISREG($mode)) {
1324                 return "file";
1325         } else {
1326                 return "unknown";
1327         }
1328 }
1329
1330 # convert file mode in octal to file type description string
1331 sub file_type_long {
1332         my $mode = shift;
1333
1334         if ($mode !~ m/^[0-7]+$/) {
1335                 return $mode;
1336         } else {
1337                 $mode = oct $mode;
1338         }
1339
1340         if (S_ISGITLINK($mode)) {
1341                 return "submodule";
1342         } elsif (S_ISDIR($mode & S_IFMT)) {
1343                 return "directory";
1344         } elsif (S_ISLNK($mode)) {
1345                 return "symlink";
1346         } elsif (S_ISREG($mode)) {
1347                 if ($mode & S_IXUSR) {
1348                         return "executable";
1349                 } else {
1350                         return "file";
1351                 };
1352         } else {
1353                 return "unknown";
1354         }
1355 }
1356
1357
1358 ## ----------------------------------------------------------------------
1359 ## functions returning short HTML fragments, or transforming HTML fragments
1360 ## which don't belong to other sections
1361
1362 # format line of commit message.
1363 sub format_log_line_html {
1364         my $line = shift;
1365
1366         $line = esc_html($line, -nbsp=>1);
1367         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1368                 my $hash_text = $1;
1369                 my $link =
1370                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1371                                 -class => "text"}, $hash_text);
1372                 $line =~ s/$hash_text/$link/;
1373         }
1374         return $line;
1375 }
1376
1377 # format marker of refs pointing to given object
1378
1379 # the destination action is chosen based on object type and current context:
1380 # - for annotated tags, we choose the tag view unless it's the current view
1381 #   already, in which case we go to shortlog view
1382 # - for other refs, we keep the current view if we're in history, shortlog or
1383 #   log view, and select shortlog otherwise
1384 sub format_ref_marker {
1385         my ($refs, $id) = @_;
1386         my $markers = '';
1387
1388         if (defined $refs->{$id}) {
1389                 foreach my $ref (@{$refs->{$id}}) {
1390                         # this code exploits the fact that non-lightweight tags are the
1391                         # only indirect objects, and that they are the only objects for which
1392                         # we want to use tag instead of shortlog as action
1393                         my ($type, $name) = qw();
1394                         my $indirect = ($ref =~ s/\^\{\}$//);
1395                         # e.g. tags/v2.6.11 or heads/next
1396                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1397                                 $type = $1;
1398                                 $name = $2;
1399                         } else {
1400                                 $type = "ref";
1401                                 $name = $ref;
1402                         }
1403
1404                         my $class = $type;
1405                         $class .= " indirect" if $indirect;
1406
1407                         my $dest_action = "shortlog";
1408
1409                         if ($indirect) {
1410                                 $dest_action = "tag" unless $action eq "tag";
1411                         } elsif ($action =~ /^(history|(short)?log)$/) {
1412                                 $dest_action = $action;
1413                         }
1414
1415                         my $dest = "";
1416                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1417                         $dest .= $ref;
1418
1419                         my $link = $cgi->a({
1420                                 -href => href(
1421                                         action=>$dest_action,
1422                                         hash=>$dest
1423                                 )}, $name);
1424
1425                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1426                                 $link . "</span>";
1427                 }
1428         }
1429
1430         if ($markers) {
1431                 return ' <span class="refs">'. $markers . '</span>';
1432         } else {
1433                 return "";
1434         }
1435 }
1436
1437 # format, perhaps shortened and with markers, title line
1438 sub format_subject_html {
1439         my ($long, $short, $href, $extra) = @_;
1440         $extra = '' unless defined($extra);
1441
1442         if (length($short) < length($long)) {
1443                 return $cgi->a({-href => $href, -class => "list subject",
1444                                 -title => to_utf8($long)},
1445                        esc_html($short) . $extra);
1446         } else {
1447                 return $cgi->a({-href => $href, -class => "list subject"},
1448                        esc_html($long)  . $extra);
1449         }
1450 }
1451
1452 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1453 sub format_git_diff_header_line {
1454         my $line = shift;
1455         my $diffinfo = shift;
1456         my ($from, $to) = @_;
1457
1458         if ($diffinfo->{'nparents'}) {
1459                 # combined diff
1460                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1461                 if ($to->{'href'}) {
1462                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1463                                          esc_path($to->{'file'}));
1464                 } else { # file was deleted (no href)
1465                         $line .= esc_path($to->{'file'});
1466                 }
1467         } else {
1468                 # "ordinary" diff
1469                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1470                 if ($from->{'href'}) {
1471                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1472                                          'a/' . esc_path($from->{'file'}));
1473                 } else { # file was added (no href)
1474                         $line .= 'a/' . esc_path($from->{'file'});
1475                 }
1476                 $line .= ' ';
1477                 if ($to->{'href'}) {
1478                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1479                                          'b/' . esc_path($to->{'file'}));
1480                 } else { # file was deleted
1481                         $line .= 'b/' . esc_path($to->{'file'});
1482                 }
1483         }
1484
1485         return "<div class=\"diff header\">$line</div>\n";
1486 }
1487
1488 # format extended diff header line, before patch itself
1489 sub format_extended_diff_header_line {
1490         my $line = shift;
1491         my $diffinfo = shift;
1492         my ($from, $to) = @_;
1493
1494         # match <path>
1495         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1496                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1497                                        esc_path($from->{'file'}));
1498         }
1499         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1500                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1501                                  esc_path($to->{'file'}));
1502         }
1503         # match single <mode>
1504         if ($line =~ m/\s(\d{6})$/) {
1505                 $line .= '<span class="info"> (' .
1506                          file_type_long($1) .
1507                          ')</span>';
1508         }
1509         # match <hash>
1510         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1511                 # can match only for combined diff
1512                 $line = 'index ';
1513                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1514                         if ($from->{'href'}[$i]) {
1515                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1516                                                   -class=>"hash"},
1517                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1518                         } else {
1519                                 $line .= '0' x 7;
1520                         }
1521                         # separator
1522                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1523                 }
1524                 $line .= '..';
1525                 if ($to->{'href'}) {
1526                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1527                                          substr($diffinfo->{'to_id'},0,7));
1528                 } else {
1529                         $line .= '0' x 7;
1530                 }
1531
1532         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1533                 # can match only for ordinary diff
1534                 my ($from_link, $to_link);
1535                 if ($from->{'href'}) {
1536                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1537                                              substr($diffinfo->{'from_id'},0,7));
1538                 } else {
1539                         $from_link = '0' x 7;
1540                 }
1541                 if ($to->{'href'}) {
1542                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1543                                            substr($diffinfo->{'to_id'},0,7));
1544                 } else {
1545                         $to_link = '0' x 7;
1546                 }
1547                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1548                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1549         }
1550
1551         return $line . "<br/>\n";
1552 }
1553
1554 # format from-file/to-file diff header
1555 sub format_diff_from_to_header {
1556         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1557         my $line;
1558         my $result = '';
1559
1560         $line = $from_line;
1561         #assert($line =~ m/^---/) if DEBUG;
1562         # no extra formatting for "^--- /dev/null"
1563         if (! $diffinfo->{'nparents'}) {
1564                 # ordinary (single parent) diff
1565                 if ($line =~ m!^--- "?a/!) {
1566                         if ($from->{'href'}) {
1567                                 $line = '--- a/' .
1568                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1569                                                 esc_path($from->{'file'}));
1570                         } else {
1571                                 $line = '--- a/' .
1572                                         esc_path($from->{'file'});
1573                         }
1574                 }
1575                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1576
1577         } else {
1578                 # combined diff (merge commit)
1579                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1580                         if ($from->{'href'}[$i]) {
1581                                 $line = '--- ' .
1582                                         $cgi->a({-href=>href(action=>"blobdiff",
1583                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1584                                                              hash_parent_base=>$parents[$i],
1585                                                              file_parent=>$from->{'file'}[$i],
1586                                                              hash=>$diffinfo->{'to_id'},
1587                                                              hash_base=>$hash,
1588                                                              file_name=>$to->{'file'}),
1589                                                  -class=>"path",
1590                                                  -title=>"diff" . ($i+1)},
1591                                                 $i+1) .
1592                                         '/' .
1593                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1594                                                 esc_path($from->{'file'}[$i]));
1595                         } else {
1596                                 $line = '--- /dev/null';
1597                         }
1598                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1599                 }
1600         }
1601
1602         $line = $to_line;
1603         #assert($line =~ m/^\+\+\+/) if DEBUG;
1604         # no extra formatting for "^+++ /dev/null"
1605         if ($line =~ m!^\+\+\+ "?b/!) {
1606                 if ($to->{'href'}) {
1607                         $line = '+++ b/' .
1608                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1609                                         esc_path($to->{'file'}));
1610                 } else {
1611                         $line = '+++ b/' .
1612                                 esc_path($to->{'file'});
1613                 }
1614         }
1615         $result .= qq!<div class="diff to_file">$line</div>\n!;
1616
1617         return $result;
1618 }
1619
1620 # create note for patch simplified by combined diff
1621 sub format_diff_cc_simplified {
1622         my ($diffinfo, @parents) = @_;
1623         my $result = '';
1624
1625         $result .= "<div class=\"diff header\">" .
1626                    "diff --cc ";
1627         if (!is_deleted($diffinfo)) {
1628                 $result .= $cgi->a({-href => href(action=>"blob",
1629                                                   hash_base=>$hash,
1630                                                   hash=>$diffinfo->{'to_id'},
1631                                                   file_name=>$diffinfo->{'to_file'}),
1632                                     -class => "path"},
1633                                    esc_path($diffinfo->{'to_file'}));
1634         } else {
1635                 $result .= esc_path($diffinfo->{'to_file'});
1636         }
1637         $result .= "</div>\n" . # class="diff header"
1638                    "<div class=\"diff nodifferences\">" .
1639                    "Simple merge" .
1640                    "</div>\n"; # class="diff nodifferences"
1641
1642         return $result;
1643 }
1644
1645 # format patch (diff) line (not to be used for diff headers)
1646 sub format_diff_line {
1647         my $line = shift;
1648         my ($from, $to) = @_;
1649         my $diff_class = "";
1650
1651         chomp $line;
1652
1653         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1654                 # combined diff
1655                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1656                 if ($line =~ m/^\@{3}/) {
1657                         $diff_class = " chunk_header";
1658                 } elsif ($line =~ m/^\\/) {
1659                         $diff_class = " incomplete";
1660                 } elsif ($prefix =~ tr/+/+/) {
1661                         $diff_class = " add";
1662                 } elsif ($prefix =~ tr/-/-/) {
1663                         $diff_class = " rem";
1664                 }
1665         } else {
1666                 # assume ordinary diff
1667                 my $char = substr($line, 0, 1);
1668                 if ($char eq '+') {
1669                         $diff_class = " add";
1670                 } elsif ($char eq '-') {
1671                         $diff_class = " rem";
1672                 } elsif ($char eq '@') {
1673                         $diff_class = " chunk_header";
1674                 } elsif ($char eq "\\") {
1675                         $diff_class = " incomplete";
1676                 }
1677         }
1678         $line = untabify($line);
1679         if ($from && $to && $line =~ m/^\@{2} /) {
1680                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1681                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1682
1683                 $from_lines = 0 unless defined $from_lines;
1684                 $to_lines   = 0 unless defined $to_lines;
1685
1686                 if ($from->{'href'}) {
1687                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1688                                              -class=>"list"}, $from_text);
1689                 }
1690                 if ($to->{'href'}) {
1691                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1692                                              -class=>"list"}, $to_text);
1693                 }
1694                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1695                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1696                 return "<div class=\"diff$diff_class\">$line</div>\n";
1697         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1698                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1699                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1700
1701                 @from_text = split(' ', $ranges);
1702                 for (my $i = 0; $i < @from_text; ++$i) {
1703                         ($from_start[$i], $from_nlines[$i]) =
1704                                 (split(',', substr($from_text[$i], 1)), 0);
1705                 }
1706
1707                 $to_text   = pop @from_text;
1708                 $to_start  = pop @from_start;
1709                 $to_nlines = pop @from_nlines;
1710
1711                 $line = "<span class=\"chunk_info\">$prefix ";
1712                 for (my $i = 0; $i < @from_text; ++$i) {
1713                         if ($from->{'href'}[$i]) {
1714                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1715                                                   -class=>"list"}, $from_text[$i]);
1716                         } else {
1717                                 $line .= $from_text[$i];
1718                         }
1719                         $line .= " ";
1720                 }
1721                 if ($to->{'href'}) {
1722                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1723                                           -class=>"list"}, $to_text);
1724                 } else {
1725                         $line .= $to_text;
1726                 }
1727                 $line .= " $prefix</span>" .
1728                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1729                 return "<div class=\"diff$diff_class\">$line</div>\n";
1730         }
1731         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1732 }
1733
1734 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1735 # linked.  Pass the hash of the tree/commit to snapshot.
1736 sub format_snapshot_links {
1737         my ($hash) = @_;
1738         my $num_fmts = @snapshot_fmts;
1739         if ($num_fmts > 1) {
1740                 # A parenthesized list of links bearing format names.
1741                 # e.g. "snapshot (_tar.gz_ _zip_)"
1742                 return "snapshot (" . join(' ', map
1743                         $cgi->a({
1744                                 -href => href(
1745                                         action=>"snapshot",
1746                                         hash=>$hash,
1747                                         snapshot_format=>$_
1748                                 )
1749                         }, $known_snapshot_formats{$_}{'display'})
1750                 , @snapshot_fmts) . ")";
1751         } elsif ($num_fmts == 1) {
1752                 # A single "snapshot" link whose tooltip bears the format name.
1753                 # i.e. "_snapshot_"
1754                 my ($fmt) = @snapshot_fmts;
1755                 return
1756                         $cgi->a({
1757                                 -href => href(
1758                                         action=>"snapshot",
1759                                         hash=>$hash,
1760                                         snapshot_format=>$fmt
1761                                 ),
1762                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1763                         }, "snapshot");
1764         } else { # $num_fmts == 0
1765                 return undef;
1766         }
1767 }
1768
1769 ## ......................................................................
1770 ## functions returning values to be passed, perhaps after some
1771 ## transformation, to other functions; e.g. returning arguments to href()
1772
1773 # returns hash to be passed to href to generate gitweb URL
1774 # in -title key it returns description of link
1775 sub get_feed_info {
1776         my $format = shift || 'Atom';
1777         my %res = (action => lc($format));
1778
1779         # feed links are possible only for project views
1780         return unless (defined $project);
1781         # some views should link to OPML, or to generic project feed,
1782         # or don't have specific feed yet (so they should use generic)
1783         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1784
1785         my $branch;
1786         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1787         # from tag links; this also makes possible to detect branch links
1788         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1789             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1790                 $branch = $1;
1791         }
1792         # find log type for feed description (title)
1793         my $type = 'log';
1794         if (defined $file_name) {
1795                 $type  = "history of $file_name";
1796                 $type .= "/" if ($action eq 'tree');
1797                 $type .= " on '$branch'" if (defined $branch);
1798         } else {
1799                 $type = "log of $branch" if (defined $branch);
1800         }
1801
1802         $res{-title} = $type;
1803         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1804         $res{'file_name'} = $file_name;
1805
1806         return %res;
1807 }
1808
1809 ## ----------------------------------------------------------------------
1810 ## git utility subroutines, invoking git commands
1811
1812 # returns path to the core git executable and the --git-dir parameter as list
1813 sub git_cmd {
1814         return $GIT, '--git-dir='.$git_dir;
1815 }
1816
1817 # quote the given arguments for passing them to the shell
1818 # quote_command("command", "arg 1", "arg with ' and ! characters")
1819 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1820 # Try to avoid using this function wherever possible.
1821 sub quote_command {
1822         return join(' ',
1823                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1824 }
1825
1826 # get HEAD ref of given project as hash
1827 sub git_get_head_hash {
1828         my $project = shift;
1829         my $o_git_dir = $git_dir;
1830         my $retval = undef;
1831         $git_dir = "$projectroot/$project";
1832         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1833                 my $head = <$fd>;
1834                 close $fd;
1835                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1836                         $retval = $1;
1837                 }
1838         }
1839         if (defined $o_git_dir) {
1840                 $git_dir = $o_git_dir;
1841         }
1842         return $retval;
1843 }
1844
1845 # get type of given object
1846 sub git_get_type {
1847         my $hash = shift;
1848
1849         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1850         my $type = <$fd>;
1851         close $fd or return;
1852         chomp $type;
1853         return $type;
1854 }
1855
1856 # repository configuration
1857 our $config_file = '';
1858 our %config;
1859
1860 # store multiple values for single key as anonymous array reference
1861 # single values stored directly in the hash, not as [ <value> ]
1862 sub hash_set_multi {
1863         my ($hash, $key, $value) = @_;
1864
1865         if (!exists $hash->{$key}) {
1866                 $hash->{$key} = $value;
1867         } elsif (!ref $hash->{$key}) {
1868                 $hash->{$key} = [ $hash->{$key}, $value ];
1869         } else {
1870                 push @{$hash->{$key}}, $value;
1871         }
1872 }
1873
1874 # return hash of git project configuration
1875 # optionally limited to some section, e.g. 'gitweb'
1876 sub git_parse_project_config {
1877         my $section_regexp = shift;
1878         my %config;
1879
1880         local $/ = "\0";
1881
1882         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1883                 or return;
1884
1885         while (my $keyval = <$fh>) {
1886                 chomp $keyval;
1887                 my ($key, $value) = split(/\n/, $keyval, 2);
1888
1889                 hash_set_multi(\%config, $key, $value)
1890                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1891         }
1892         close $fh;
1893
1894         return %config;
1895 }
1896
1897 # convert config value to boolean, 'true' or 'false'
1898 # no value, number > 0, 'true' and 'yes' values are true
1899 # rest of values are treated as false (never as error)
1900 sub config_to_bool {
1901         my $val = shift;
1902
1903         # strip leading and trailing whitespace
1904         $val =~ s/^\s+//;
1905         $val =~ s/\s+$//;
1906
1907         return (!defined $val ||               # section.key
1908                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1909                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1910 }
1911
1912 # convert config value to simple decimal number
1913 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1914 # to be multiplied by 1024, 1048576, or 1073741824
1915 sub config_to_int {
1916         my $val = shift;
1917
1918         # strip leading and trailing whitespace
1919         $val =~ s/^\s+//;
1920         $val =~ s/\s+$//;
1921
1922         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1923                 $unit = lc($unit);
1924                 # unknown unit is treated as 1
1925                 return $num * ($unit eq 'g' ? 1073741824 :
1926                                $unit eq 'm' ?    1048576 :
1927                                $unit eq 'k' ?       1024 : 1);
1928         }
1929         return $val;
1930 }
1931
1932 # convert config value to array reference, if needed
1933 sub config_to_multi {
1934         my $val = shift;
1935
1936         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1937 }
1938
1939 sub git_get_project_config {
1940         my ($key, $type) = @_;
1941
1942         # key sanity check
1943         return unless ($key);
1944         $key =~ s/^gitweb\.//;
1945         return if ($key =~ m/\W/);
1946
1947         # type sanity check
1948         if (defined $type) {
1949                 $type =~ s/^--//;
1950                 $type = undef
1951                         unless ($type eq 'bool' || $type eq 'int');
1952         }
1953
1954         # get config
1955         if (!defined $config_file ||
1956             $config_file ne "$git_dir/config") {
1957                 %config = git_parse_project_config('gitweb');
1958                 $config_file = "$git_dir/config";
1959         }
1960
1961         # ensure given type
1962         if (!defined $type) {
1963                 return $config{"gitweb.$key"};
1964         } elsif ($type eq 'bool') {
1965                 # backward compatibility: 'git config --bool' returns true/false
1966                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1967         } elsif ($type eq 'int') {
1968                 return config_to_int($config{"gitweb.$key"});
1969         }
1970         return $config{"gitweb.$key"};
1971 }
1972
1973 # get hash of given path at given ref
1974 sub git_get_hash_by_path {
1975         my $base = shift;
1976         my $path = shift || return undef;
1977         my $type = shift;
1978
1979         $path =~ s,/+$,,;
1980
1981         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1982                 or die_error(500, "Open git-ls-tree failed");
1983         my $line = <$fd>;
1984         close $fd or return undef;
1985
1986         if (!defined $line) {
1987                 # there is no tree or hash given by $path at $base
1988                 return undef;
1989         }
1990
1991         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1992         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1993         if (defined $type && $type ne $2) {
1994                 # type doesn't match
1995                 return undef;
1996         }
1997         return $3;
1998 }
1999
2000 # get path of entry with given hash at given tree-ish (ref)
2001 # used to get 'from' filename for combined diff (merge commit) for renames
2002 sub git_get_path_by_hash {
2003         my $base = shift || return;
2004         my $hash = shift || return;
2005
2006         local $/ = "\0";
2007
2008         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2009                 or return undef;
2010         while (my $line = <$fd>) {
2011                 chomp $line;
2012
2013                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2014                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2015                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2016                         close $fd;
2017                         return $1;
2018                 }
2019         }
2020         close $fd;
2021         return undef;
2022 }
2023
2024 ## ......................................................................
2025 ## git utility functions, directly accessing git repository
2026
2027 sub git_get_project_description {
2028         my $path = shift;
2029
2030         $git_dir = "$projectroot/$path";
2031         open my $fd, "$git_dir/description"
2032                 or return git_get_project_config('description');
2033         my $descr = <$fd>;
2034         close $fd;
2035         if (defined $descr) {
2036                 chomp $descr;
2037         }
2038         return $descr;
2039 }
2040
2041 sub git_get_project_ctags {
2042         my $path = shift;
2043         my $ctags = {};
2044
2045         $git_dir = "$projectroot/$path";
2046         unless (opendir D, "$git_dir/ctags") {
2047                 return $ctags;
2048         }
2049         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2050                 open CT, $_ or next;
2051                 my $val = <CT>;
2052                 chomp $val;
2053                 close CT;
2054                 my $ctag = $_; $ctag =~ s#.*/##;
2055                 $ctags->{$ctag} = $val;
2056         }
2057         closedir D;
2058         $ctags;
2059 }
2060
2061 sub git_populate_project_tagcloud {
2062         my $ctags = shift;
2063
2064         # First, merge different-cased tags; tags vote on casing
2065         my %ctags_lc;
2066         foreach (keys %$ctags) {
2067                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2068                 if (not $ctags_lc{lc $_}->{topcount}
2069                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2070                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2071                         $ctags_lc{lc $_}->{topname} = $_;
2072                 }
2073         }
2074
2075         my $cloud;
2076         if (eval { require HTML::TagCloud; 1; }) {
2077                 $cloud = HTML::TagCloud->new;
2078                 foreach (sort keys %ctags_lc) {
2079                         # Pad the title with spaces so that the cloud looks
2080                         # less crammed.
2081                         my $title = $ctags_lc{$_}->{topname};
2082                         $title =~ s/ /&nbsp;/g;
2083                         $title =~ s/^/&nbsp;/g;
2084                         $title =~ s/$/&nbsp;/g;
2085                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2086                 }
2087         } else {
2088                 $cloud = \%ctags_lc;
2089         }
2090         $cloud;
2091 }
2092
2093 sub git_show_project_tagcloud {
2094         my ($cloud, $count) = @_;
2095         print STDERR ref($cloud)."..\n";
2096         if (ref $cloud eq 'HTML::TagCloud') {
2097                 return $cloud->html_and_css($count);
2098         } else {
2099                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2100                 return '<p align="center">' . join (', ', map {
2101                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2102                 } splice(@tags, 0, $count)) . '</p>';
2103         }
2104 }
2105
2106 sub git_get_project_url_list {
2107         my $path = shift;
2108
2109         $git_dir = "$projectroot/$path";
2110         open my $fd, "$git_dir/cloneurl"
2111                 or return wantarray ?
2112                 @{ config_to_multi(git_get_project_config('url')) } :
2113                    config_to_multi(git_get_project_config('url'));
2114         my @git_project_url_list = map { chomp; $_ } <$fd>;
2115         close $fd;
2116
2117         return wantarray ? @git_project_url_list : \@git_project_url_list;
2118 }
2119
2120 sub git_get_projects_list {
2121         my ($filter) = @_;
2122         my @list;
2123
2124         $filter ||= '';
2125         $filter =~ s/\.git$//;
2126
2127         my $check_forks = gitweb_check_feature('forks');
2128
2129         if (-d $projects_list) {
2130                 # search in directory
2131                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2132                 # remove the trailing "/"
2133                 $dir =~ s!/+$!!;
2134                 my $pfxlen = length("$dir");
2135                 my $pfxdepth = ($dir =~ tr!/!!);
2136
2137                 File::Find::find({
2138                         follow_fast => 1, # follow symbolic links
2139                         follow_skip => 2, # ignore duplicates
2140                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2141                         wanted => sub {
2142                                 # skip project-list toplevel, if we get it.
2143                                 return if (m!^[/.]$!);
2144                                 # only directories can be git repositories
2145                                 return unless (-d $_);
2146                                 # don't traverse too deep (Find is super slow on os x)
2147                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2148                                         $File::Find::prune = 1;
2149                                         return;
2150                                 }
2151
2152                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2153                                 # we check related file in $projectroot
2154                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2155                                 if (check_export_ok("$projectroot/$path")) {
2156                                         push @list, { path => $path };
2157                                         $File::Find::prune = 1;
2158                                 }
2159                         },
2160                 }, "$dir");
2161
2162         } elsif (-f $projects_list) {
2163                 # read from file(url-encoded):
2164                 # 'git%2Fgit.git Linus+Torvalds'
2165                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2166                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2167                 my %paths;
2168                 open my ($fd), $projects_list or return;
2169         PROJECT:
2170                 while (my $line = <$fd>) {
2171                         chomp $line;
2172                         my ($path, $owner) = split ' ', $line;
2173                         $path = unescape($path);
2174                         $owner = unescape($owner);
2175                         if (!defined $path) {
2176                                 next;
2177                         }
2178                         if ($filter ne '') {
2179                                 # looking for forks;
2180                                 my $pfx = substr($path, 0, length($filter));
2181                                 if ($pfx ne $filter) {
2182                                         next PROJECT;
2183                                 }
2184                                 my $sfx = substr($path, length($filter));
2185                                 if ($sfx !~ /^\/.*\.git$/) {
2186                                         next PROJECT;
2187                                 }
2188                         } elsif ($check_forks) {
2189                         PATH:
2190                                 foreach my $filter (keys %paths) {
2191                                         # looking for forks;
2192                                         my $pfx = substr($path, 0, length($filter));
2193                                         if ($pfx ne $filter) {
2194                                                 next PATH;
2195                                         }
2196                                         my $sfx = substr($path, length($filter));
2197                                         if ($sfx !~ /^\/.*\.git$/) {
2198                                                 next PATH;
2199                                         }
2200                                         # is a fork, don't include it in
2201                                         # the list
2202                                         next PROJECT;
2203                                 }
2204                         }
2205                         if (check_export_ok("$projectroot/$path")) {
2206                                 my $pr = {
2207                                         path => $path,
2208                                         owner => to_utf8($owner),
2209                                 };
2210                                 push @list, $pr;
2211                                 (my $forks_path = $path) =~ s/\.git$//;
2212                                 $paths{$forks_path}++;
2213                         }
2214                 }
2215                 close $fd;
2216         }
2217         return @list;
2218 }
2219
2220 our $gitweb_project_owner = undef;
2221 sub git_get_project_list_from_file {
2222
2223         return if (defined $gitweb_project_owner);
2224
2225         $gitweb_project_owner = {};
2226         # read from file (url-encoded):
2227         # 'git%2Fgit.git Linus+Torvalds'
2228         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2229         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2230         if (-f $projects_list) {
2231                 open (my $fd , $projects_list);
2232                 while (my $line = <$fd>) {
2233                         chomp $line;
2234                         my ($pr, $ow) = split ' ', $line;
2235                         $pr = unescape($pr);
2236                         $ow = unescape($ow);
2237                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2238                 }
2239                 close $fd;
2240         }
2241 }
2242
2243 sub git_get_project_owner {
2244         my $project = shift;
2245         my $owner;
2246
2247         return undef unless $project;
2248         $git_dir = "$projectroot/$project";
2249
2250         if (!defined $gitweb_project_owner) {
2251                 git_get_project_list_from_file();
2252         }
2253
2254         if (exists $gitweb_project_owner->{$project}) {
2255                 $owner = $gitweb_project_owner->{$project};
2256         }
2257         if (!defined $owner){
2258                 $owner = git_get_project_config('owner');
2259         }
2260         if (!defined $owner) {
2261                 $owner = get_file_owner("$git_dir");
2262         }
2263
2264         return $owner;
2265 }
2266
2267 sub git_get_last_activity {
2268         my ($path) = @_;
2269         my $fd;
2270
2271         $git_dir = "$projectroot/$path";
2272         open($fd, "-|", git_cmd(), 'for-each-ref',
2273              '--format=%(committer)',
2274              '--sort=-committerdate',
2275              '--count=1',
2276              'refs/heads') or return;
2277         my $most_recent = <$fd>;
2278         close $fd or return;
2279         if (defined $most_recent &&
2280             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2281                 my $timestamp = $1;
2282                 my $age = time - $timestamp;
2283                 return ($age, age_string($age));
2284         }
2285         return (undef, undef);
2286 }
2287
2288 sub git_get_references {
2289         my $type = shift || "";
2290         my %refs;
2291         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2292         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2293         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2294                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2295                 or return;
2296
2297         while (my $line = <$fd>) {
2298                 chomp $line;
2299                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2300                         if (defined $refs{$1}) {
2301                                 push @{$refs{$1}}, $2;
2302                         } else {
2303                                 $refs{$1} = [ $2 ];
2304                         }
2305                 }
2306         }
2307         close $fd or return;
2308         return \%refs;
2309 }
2310
2311 sub git_get_rev_name_tags {
2312         my $hash = shift || return undef;
2313
2314         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2315                 or return;
2316         my $name_rev = <$fd>;
2317         close $fd;
2318
2319         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2320                 return $1;
2321         } else {
2322                 # catches also '$hash undefined' output
2323                 return undef;
2324         }
2325 }
2326
2327 ## ----------------------------------------------------------------------
2328 ## parse to hash functions
2329
2330 sub parse_date {
2331         my $epoch = shift;
2332         my $tz = shift || "-0000";
2333
2334         my %date;
2335         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2336         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2337         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2338         $date{'hour'} = $hour;
2339         $date{'minute'} = $min;
2340         $date{'mday'} = $mday;
2341         $date{'day'} = $days[$wday];
2342         $date{'month'} = $months[$mon];
2343         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2344                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2345         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2346                              $mday, $months[$mon], $hour ,$min;
2347         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2348                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2349
2350         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2351         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2352         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2353         $date{'hour_local'} = $hour;
2354         $date{'minute_local'} = $min;
2355         $date{'tz_local'} = $tz;
2356         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2357                                   1900+$year, $mon+1, $mday,
2358                                   $hour, $min, $sec, $tz);
2359         return %date;
2360 }
2361
2362 sub parse_tag {
2363         my $tag_id = shift;
2364         my %tag;
2365         my @comment;
2366
2367         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2368         $tag{'id'} = $tag_id;
2369         while (my $line = <$fd>) {
2370                 chomp $line;
2371                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2372                         $tag{'object'} = $1;
2373                 } elsif ($line =~ m/^type (.+)$/) {
2374                         $tag{'type'} = $1;
2375                 } elsif ($line =~ m/^tag (.+)$/) {
2376                         $tag{'name'} = $1;
2377                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2378                         $tag{'author'} = $1;
2379                         $tag{'epoch'} = $2;
2380                         $tag{'tz'} = $3;
2381                 } elsif ($line =~ m/--BEGIN/) {
2382                         push @comment, $line;
2383                         last;
2384                 } elsif ($line eq "") {
2385                         last;
2386                 }
2387         }
2388         push @comment, <$fd>;
2389         $tag{'comment'} = \@comment;
2390         close $fd or return;
2391         if (!defined $tag{'name'}) {
2392                 return
2393         };
2394         return %tag
2395 }
2396
2397 sub parse_commit_text {
2398         my ($commit_text, $withparents) = @_;
2399         my @commit_lines = split '\n', $commit_text;
2400         my %co;
2401
2402         pop @commit_lines; # Remove '\0'
2403
2404         if (! @commit_lines) {
2405                 return;
2406         }
2407
2408         my $header = shift @commit_lines;
2409         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2410                 return;
2411         }
2412         ($co{'id'}, my @parents) = split ' ', $header;
2413         while (my $line = shift @commit_lines) {
2414                 last if $line eq "\n";
2415                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2416                         $co{'tree'} = $1;
2417                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2418                         push @parents, $1;
2419                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2420                         $co{'author'} = $1;
2421                         $co{'author_epoch'} = $2;
2422                         $co{'author_tz'} = $3;
2423                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2424                                 $co{'author_name'}  = $1;
2425                                 $co{'author_email'} = $2;
2426                         } else {
2427                                 $co{'author_name'} = $co{'author'};
2428                         }
2429                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2430                         $co{'committer'} = $1;
2431                         $co{'committer_epoch'} = $2;
2432                         $co{'committer_tz'} = $3;
2433                         $co{'committer_name'} = $co{'committer'};
2434                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2435                                 $co{'committer_name'}  = $1;
2436                                 $co{'committer_email'} = $2;
2437                         } else {
2438                                 $co{'committer_name'} = $co{'committer'};
2439                         }
2440                 }
2441         }
2442         if (!defined $co{'tree'}) {
2443                 return;
2444         };
2445         $co{'parents'} = \@parents;
2446         $co{'parent'} = $parents[0];
2447
2448         foreach my $title (@commit_lines) {
2449                 $title =~ s/^    //;
2450                 if ($title ne "") {
2451                         $co{'title'} = chop_str($title, 80, 5);
2452                         # remove leading stuff of merges to make the interesting part visible
2453                         if (length($title) > 50) {
2454                                 $title =~ s/^Automatic //;
2455                                 $title =~ s/^merge (of|with) /Merge ... /i;
2456                                 if (length($title) > 50) {
2457                                         $title =~ s/(http|rsync):\/\///;
2458                                 }
2459                                 if (length($title) > 50) {
2460                                         $title =~ s/(master|www|rsync)\.//;
2461                                 }
2462                                 if (length($title) > 50) {
2463                                         $title =~ s/kernel.org:?//;
2464                                 }
2465                                 if (length($title) > 50) {
2466                                         $title =~ s/\/pub\/scm//;
2467                                 }
2468                         }
2469                         $co{'title_short'} = chop_str($title, 50, 5);
2470                         last;
2471                 }
2472         }
2473         if (! defined $co{'title'} || $co{'title'} eq "") {
2474                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2475         }
2476         # remove added spaces
2477         foreach my $line (@commit_lines) {
2478                 $line =~ s/^    //;
2479         }
2480         $co{'comment'} = \@commit_lines;
2481
2482         my $age = time - $co{'committer_epoch'};
2483         $co{'age'} = $age;
2484         $co{'age_string'} = age_string($age);
2485         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2486         if ($age > 60*60*24*7*2) {
2487                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2488                 $co{'age_string_age'} = $co{'age_string'};
2489         } else {
2490                 $co{'age_string_date'} = $co{'age_string'};
2491                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2492         }
2493         return %co;
2494 }
2495
2496 sub parse_commit {
2497         my ($commit_id) = @_;
2498         my %co;
2499
2500         local $/ = "\0";
2501
2502         open my $fd, "-|", git_cmd(), "rev-list",
2503                 "--parents",
2504                 "--header",
2505                 "--max-count=1",
2506                 $commit_id,
2507                 "--",
2508                 or die_error(500, "Open git-rev-list failed");
2509         %co = parse_commit_text(<$fd>, 1);
2510         close $fd;
2511
2512         return %co;
2513 }
2514
2515 sub parse_commits {
2516         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2517         my @cos;
2518
2519         $maxcount ||= 1;
2520         $skip ||= 0;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--header",
2526                 @args,
2527                 ("--max-count=" . $maxcount),
2528                 ("--skip=" . $skip),
2529                 @extra_options,
2530                 $commit_id,
2531                 "--",
2532                 ($filename ? ($filename) : ())
2533                 or die_error(500, "Open git-rev-list failed");
2534         while (my $line = <$fd>) {
2535                 my %co = parse_commit_text($line);
2536                 push @cos, \%co;
2537         }
2538         close $fd;
2539
2540         return wantarray ? @cos : \@cos;
2541 }
2542
2543 # parse line of git-diff-tree "raw" output
2544 sub parse_difftree_raw_line {
2545         my $line = shift;
2546         my %res;
2547
2548         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2549         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2550         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2551                 $res{'from_mode'} = $1;
2552                 $res{'to_mode'} = $2;
2553                 $res{'from_id'} = $3;
2554                 $res{'to_id'} = $4;
2555                 $res{'status'} = $5;
2556                 $res{'similarity'} = $6;
2557                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2558                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2559                 } else {
2560                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2561                 }
2562         }
2563         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2564         # combined diff (for merge commit)
2565         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2566                 $res{'nparents'}  = length($1);
2567                 $res{'from_mode'} = [ split(' ', $2) ];
2568                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2569                 $res{'from_id'} = [ split(' ', $3) ];
2570                 $res{'to_id'} = pop @{$res{'from_id'}};
2571                 $res{'status'} = [ split('', $4) ];
2572                 $res{'to_file'} = unquote($5);
2573         }
2574         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2575         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2576                 $res{'commit'} = $1;
2577         }
2578
2579         return wantarray ? %res : \%res;
2580 }
2581
2582 # wrapper: return parsed line of git-diff-tree "raw" output
2583 # (the argument might be raw line, or parsed info)
2584 sub parsed_difftree_line {
2585         my $line_or_ref = shift;
2586
2587         if (ref($line_or_ref) eq "HASH") {
2588                 # pre-parsed (or generated by hand)
2589                 return $line_or_ref;
2590         } else {
2591                 return parse_difftree_raw_line($line_or_ref);
2592         }
2593 }
2594
2595 # parse line of git-ls-tree output
2596 sub parse_ls_tree_line ($;%) {
2597         my $line = shift;
2598         my %opts = @_;
2599         my %res;
2600
2601         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2602         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2603
2604         $res{'mode'} = $1;
2605         $res{'type'} = $2;
2606         $res{'hash'} = $3;
2607         if ($opts{'-z'}) {
2608                 $res{'name'} = $4;
2609         } else {
2610                 $res{'name'} = unquote($4);
2611         }
2612
2613         return wantarray ? %res : \%res;
2614 }
2615
2616 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2617 sub parse_from_to_diffinfo {
2618         my ($diffinfo, $from, $to, @parents) = @_;
2619
2620         if ($diffinfo->{'nparents'}) {
2621                 # combined diff
2622                 $from->{'file'} = [];
2623                 $from->{'href'} = [];
2624                 fill_from_file_info($diffinfo, @parents)
2625                         unless exists $diffinfo->{'from_file'};
2626                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2627                         $from->{'file'}[$i] =
2628                                 defined $diffinfo->{'from_file'}[$i] ?
2629                                         $diffinfo->{'from_file'}[$i] :
2630                                         $diffinfo->{'to_file'};
2631                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2632                                 $from->{'href'}[$i] = href(action=>"blob",
2633                                                            hash_base=>$parents[$i],
2634                                                            hash=>$diffinfo->{'from_id'}[$i],
2635                                                            file_name=>$from->{'file'}[$i]);
2636                         } else {
2637                                 $from->{'href'}[$i] = undef;
2638                         }
2639                 }
2640         } else {
2641                 # ordinary (not combined) diff
2642                 $from->{'file'} = $diffinfo->{'from_file'};
2643                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2644                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2645                                                hash=>$diffinfo->{'from_id'},
2646                                                file_name=>$from->{'file'});
2647                 } else {
2648                         delete $from->{'href'};
2649                 }
2650         }
2651
2652         $to->{'file'} = $diffinfo->{'to_file'};
2653         if (!is_deleted($diffinfo)) { # file exists in result
2654                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2655                                      hash=>$diffinfo->{'to_id'},
2656                                      file_name=>$to->{'file'});
2657         } else {
2658                 delete $to->{'href'};
2659         }
2660 }
2661
2662 ## ......................................................................
2663 ## parse to array of hashes functions
2664
2665 sub git_get_heads_list {
2666         my $limit = shift;
2667         my @headslist;
2668
2669         open my $fd, '-|', git_cmd(), 'for-each-ref',
2670                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2671                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2672                 'refs/heads'
2673                 or return;
2674         while (my $line = <$fd>) {
2675                 my %ref_item;
2676
2677                 chomp $line;
2678                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2679                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2680                 my ($committer, $epoch, $tz) =
2681                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2682                 $ref_item{'fullname'}  = $name;
2683                 $name =~ s!^refs/heads/!!;
2684
2685                 $ref_item{'name'}  = $name;
2686                 $ref_item{'id'}    = $hash;
2687                 $ref_item{'title'} = $title || '(no commit message)';
2688                 $ref_item{'epoch'} = $epoch;
2689                 if ($epoch) {
2690                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2691                 } else {
2692                         $ref_item{'age'} = "unknown";
2693                 }
2694
2695                 push @headslist, \%ref_item;
2696         }
2697         close $fd;
2698
2699         return wantarray ? @headslist : \@headslist;
2700 }
2701
2702 sub git_get_tags_list {
2703         my $limit = shift;
2704         my @tagslist;
2705
2706         open my $fd, '-|', git_cmd(), 'for-each-ref',
2707                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2708                 '--format=%(objectname) %(objecttype) %(refname) '.
2709                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2710                 'refs/tags'
2711                 or return;
2712         while (my $line = <$fd>) {
2713                 my %ref_item;
2714
2715                 chomp $line;
2716                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2717                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2718                 my ($creator, $epoch, $tz) =
2719                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2720                 $ref_item{'fullname'} = $name;
2721                 $name =~ s!^refs/tags/!!;
2722
2723                 $ref_item{'type'} = $type;
2724                 $ref_item{'id'} = $id;
2725                 $ref_item{'name'} = $name;
2726                 if ($type eq "tag") {
2727                         $ref_item{'subject'} = $title;
2728                         $ref_item{'reftype'} = $reftype;
2729                         $ref_item{'refid'}   = $refid;
2730                 } else {
2731                         $ref_item{'reftype'} = $type;
2732                         $ref_item{'refid'}   = $id;
2733                 }
2734
2735                 if ($type eq "tag" || $type eq "commit") {
2736                         $ref_item{'epoch'} = $epoch;
2737                         if ($epoch) {
2738                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2739                         } else {
2740                                 $ref_item{'age'} = "unknown";
2741                         }
2742                 }
2743
2744                 push @tagslist, \%ref_item;
2745         }
2746         close $fd;
2747
2748         return wantarray ? @tagslist : \@tagslist;
2749 }
2750
2751 ## ----------------------------------------------------------------------
2752 ## filesystem-related functions
2753
2754 sub get_file_owner {
2755         my $path = shift;
2756
2757         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2758         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2759         if (!defined $gcos) {
2760                 return undef;
2761         }
2762         my $owner = $gcos;
2763         $owner =~ s/[,;].*$//;
2764         return to_utf8($owner);
2765 }
2766
2767 # assume that file exists
2768 sub insert_file {
2769         my $filename = shift;
2770
2771         open my $fd, '<', $filename;
2772         print map { to_utf8($_) } <$fd>;
2773         close $fd;
2774 }
2775
2776 ## ......................................................................
2777 ## mimetype related functions
2778
2779 sub mimetype_guess_file {
2780         my $filename = shift;
2781         my $mimemap = shift;
2782         -r $mimemap or return undef;
2783
2784         my %mimemap;
2785         open(MIME, $mimemap) or return undef;
2786         while (<MIME>) {
2787                 next if m/^#/; # skip comments
2788                 my ($mime, $exts) = split(/\t+/);
2789                 if (defined $exts) {
2790                         my @exts = split(/\s+/, $exts);
2791                         foreach my $ext (@exts) {
2792                                 $mimemap{$ext} = $mime;
2793                         }
2794                 }
2795         }
2796         close(MIME);
2797
2798         $filename =~ /\.([^.]*)$/;
2799         return $mimemap{$1};
2800 }
2801
2802 sub mimetype_guess {
2803         my $filename = shift;
2804         my $mime;
2805         $filename =~ /\./ or return undef;
2806
2807         if ($mimetypes_file) {
2808                 my $file = $mimetypes_file;
2809                 if ($file !~ m!^/!) { # if it is relative path
2810                         # it is relative to project
2811                         $file = "$projectroot/$project/$file";
2812                 }
2813                 $mime = mimetype_guess_file($filename, $file);
2814         }
2815         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2816         return $mime;
2817 }
2818
2819 sub blob_mimetype {
2820         my $fd = shift;
2821         my $filename = shift;
2822
2823         if ($filename) {
2824                 my $mime = mimetype_guess($filename);
2825                 $mime and return $mime;
2826         }
2827
2828         # just in case
2829         return $default_blob_plain_mimetype unless $fd;
2830
2831         if (-T $fd) {
2832                 return 'text/plain';
2833         } elsif (! $filename) {
2834                 return 'application/octet-stream';
2835         } elsif ($filename =~ m/\.png$/i) {
2836                 return 'image/png';
2837         } elsif ($filename =~ m/\.gif$/i) {
2838                 return 'image/gif';
2839         } elsif ($filename =~ m/\.jpe?g$/i) {
2840                 return 'image/jpeg';
2841         } else {
2842                 return 'application/octet-stream';
2843         }
2844 }
2845
2846 sub blob_contenttype {
2847         my ($fd, $file_name, $type) = @_;
2848
2849         $type ||= blob_mimetype($fd, $file_name);
2850         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2851                 $type .= "; charset=$default_text_plain_charset";
2852         }
2853
2854         return $type;
2855 }
2856
2857 ## ======================================================================
2858 ## functions printing HTML: header, footer, error page
2859
2860 sub git_header_html {
2861         my $status = shift || "200 OK";
2862         my $expires = shift;
2863
2864         my $title = "$site_name";
2865         if (defined $project) {
2866                 $title .= " - " . to_utf8($project);
2867                 if (defined $action) {
2868                         $title .= "/$action";
2869                         if (defined $file_name) {
2870                                 $title .= " - " . esc_path($file_name);
2871                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2872                                         $title .= "/";
2873                                 }
2874                         }
2875                 }
2876         }
2877         my $content_type;
2878         # require explicit support from the UA if we are to send the page as
2879         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2880         # we have to do this because MSIE sometimes globs '*/*', pretending to
2881         # support xhtml+xml but choking when it gets what it asked for.
2882         if (defined $cgi->http('HTTP_ACCEPT') &&
2883             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2884             $cgi->Accept('application/xhtml+xml') != 0) {
2885                 $content_type = 'application/xhtml+xml';
2886         } else {
2887                 $content_type = 'text/html';
2888         }
2889         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2890                            -status=> $status, -expires => $expires);
2891         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2892         print <<EOF;
2893 <?xml version="1.0" encoding="utf-8"?>
2894 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2895 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2896 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2897 <!-- git core binaries version $git_version -->
2898 <head>
2899 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2900 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2901 <meta name="robots" content="index, nofollow"/>
2902 <title>$title</title>
2903 EOF
2904         # the stylesheet, favicon etc urls won't work correctly with path_info
2905         # unless we set the appropriate base URL
2906         if ($ENV{'PATH_INFO'}) {
2907                 print '<base href="'.esc_url($my_url).'" />\n';
2908         }
2909         # print out each stylesheet that exist, providing backwards capability
2910         # for those people who defined $stylesheet in a config file
2911         if (defined $stylesheet) {
2912                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2913         } else {
2914                 foreach my $stylesheet (@stylesheets) {
2915                         next unless $stylesheet;
2916                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2917                 }
2918         }
2919         if (defined $project) {
2920                 my %href_params = get_feed_info();
2921                 if (!exists $href_params{'-title'}) {
2922                         $href_params{'-title'} = 'log';
2923                 }
2924
2925                 foreach my $format qw(RSS Atom) {
2926                         my $type = lc($format);
2927                         my %link_attr = (
2928                                 '-rel' => 'alternate',
2929                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2930                                 '-type' => "application/$type+xml"
2931                         );
2932
2933                         $href_params{'action'} = $type;
2934                         $link_attr{'-href'} = href(%href_params);
2935                         print "<link ".
2936                               "rel=\"$link_attr{'-rel'}\" ".
2937                               "title=\"$link_attr{'-title'}\" ".
2938                               "href=\"$link_attr{'-href'}\" ".
2939                               "type=\"$link_attr{'-type'}\" ".
2940                               "/>\n";
2941
2942                         $href_params{'extra_options'} = '--no-merges';
2943                         $link_attr{'-href'} = href(%href_params);
2944                         $link_attr{'-title'} .= ' (no merges)';
2945                         print "<link ".
2946                               "rel=\"$link_attr{'-rel'}\" ".
2947                               "title=\"$link_attr{'-title'}\" ".
2948                               "href=\"$link_attr{'-href'}\" ".
2949                               "type=\"$link_attr{'-type'}\" ".
2950                               "/>\n";
2951                 }
2952
2953         } else {
2954                 printf('<link rel="alternate" title="%s projects list" '.
2955                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2956                        $site_name, href(project=>undef, action=>"project_index"));
2957                 printf('<link rel="alternate" title="%s projects feeds" '.
2958                        'href="%s" type="text/x-opml" />'."\n",
2959                        $site_name, href(project=>undef, action=>"opml"));
2960         }
2961         if (defined $favicon) {
2962                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2963         }
2964
2965         print "</head>\n" .
2966               "<body>\n";
2967
2968         if (-f $site_header) {
2969                 insert_file($site_header);
2970         }
2971
2972         print "<div class=\"page_header\">\n" .
2973               $cgi->a({-href => esc_url($logo_url),
2974                        -title => $logo_label},
2975                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2976         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2977         if (defined $project) {
2978                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2979                 if (defined $action) {
2980                         print " / $action";
2981                 }
2982                 print "\n";
2983         }
2984         print "</div>\n";
2985
2986         my $have_search = gitweb_check_feature('search');
2987         if (defined $project && $have_search) {
2988                 if (!defined $searchtext) {
2989                         $searchtext = "";
2990                 }
2991                 my $search_hash;
2992                 if (defined $hash_base) {
2993                         $search_hash = $hash_base;
2994                 } elsif (defined $hash) {
2995                         $search_hash = $hash;
2996                 } else {
2997                         $search_hash = "HEAD";
2998                 }
2999                 my $action = $my_uri;
3000                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3001                 if ($use_pathinfo) {
3002                         $action .= "/".esc_url($project);
3003                 }
3004                 print $cgi->startform(-method => "get", -action => $action) .
3005                       "<div class=\"search\">\n" .
3006                       (!$use_pathinfo &&
3007                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3008                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3009                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3010                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3011                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3012                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3013                       " search:\n",
3014                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3015                       "<span title=\"Extended regular expression\">" .
3016                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3017                                      -checked => $search_use_regexp) .
3018                       "</span>" .
3019                       "</div>" .
3020                       $cgi->end_form() . "\n";
3021         }
3022 }
3023
3024 sub git_footer_html {
3025         my $feed_class = 'rss_logo';
3026
3027         print "<div class=\"page_footer\">\n";
3028         if (defined $project) {
3029                 my $descr = git_get_project_description($project);
3030                 if (defined $descr) {
3031                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3032                 }
3033
3034                 my %href_params = get_feed_info();
3035                 if (!%href_params) {
3036                         $feed_class .= ' generic';
3037                 }
3038                 $href_params{'-title'} ||= 'log';
3039
3040                 foreach my $format qw(RSS Atom) {
3041                         $href_params{'action'} = lc($format);
3042                         print $cgi->a({-href => href(%href_params),
3043                                       -title => "$href_params{'-title'} $format feed",
3044                                       -class => $feed_class}, $format)."\n";
3045                 }
3046
3047         } else {
3048                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3049                               -class => $feed_class}, "OPML") . " ";
3050                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3051                               -class => $feed_class}, "TXT") . "\n";
3052         }
3053         print "</div>\n"; # class="page_footer"
3054
3055         if (-f $site_footer) {
3056                 insert_file($site_footer);
3057         }
3058
3059         print "</body>\n" .
3060               "</html>";
3061 }
3062
3063 # die_error(<http_status_code>, <error_message>)
3064 # Example: die_error(404, 'Hash not found')
3065 # By convention, use the following status codes (as defined in RFC 2616):
3066 # 400: Invalid or missing CGI parameters, or
3067 #      requested object exists but has wrong type.
3068 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3069 #      this server or project.
3070 # 404: Requested object/revision/project doesn't exist.
3071 # 500: The server isn't configured properly, or
3072 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3073 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3074 sub die_error {
3075         my $status = shift || 500;
3076         my $error = shift || "Internal server error";
3077
3078         my %http_responses = (400 => '400 Bad Request',
3079                               403 => '403 Forbidden',
3080                               404 => '404 Not Found',
3081                               500 => '500 Internal Server Error');
3082         git_header_html($http_responses{$status});
3083         print <<EOF;
3084 <div class="page_body">
3085 <br /><br />
3086 $status - $error
3087 <br />
3088 </div>
3089 EOF
3090         git_footer_html();
3091         exit;
3092 }
3093
3094 ## ----------------------------------------------------------------------
3095 ## functions printing or outputting HTML: navigation
3096
3097 sub git_print_page_nav {
3098         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3099         $extra = '' if !defined $extra; # pager or formats
3100
3101         my @navs = qw(summary shortlog log commit commitdiff tree);
3102         if ($suppress) {
3103                 @navs = grep { $_ ne $suppress } @navs;
3104         }
3105
3106         my %arg = map { $_ => {action=>$_} } @navs;
3107         if (defined $head) {
3108                 for (qw(commit commitdiff)) {
3109                         $arg{$_}{'hash'} = $head;
3110                 }
3111                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3112                         for (qw(shortlog log)) {
3113                                 $arg{$_}{'hash'} = $head;
3114                         }
3115                 }
3116         }
3117
3118         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3119         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3120
3121         my @actions = gitweb_get_feature('actions');
3122         my %repl = (
3123                 '%' => '%',
3124                 'n' => $project,         # project name
3125                 'f' => $git_dir,         # project path within filesystem
3126                 'h' => $treehead || '',  # current hash ('h' parameter)
3127                 'b' => $treebase || '',  # hash base ('hb' parameter)
3128         );
3129         while (@actions) {
3130                 my ($label, $link, $pos) = splice(@actions,0,3);
3131                 # insert
3132                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3133                 # munch munch
3134                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3135                 $arg{$label}{'_href'} = $link;
3136         }
3137
3138         print "<div class=\"page_nav\">\n" .
3139                 (join " | ",
3140                  map { $_ eq $current ?
3141                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3142                  } @navs);
3143         print "<br/>\n$extra<br/>\n" .
3144               "</div>\n";
3145 }
3146
3147 sub format_paging_nav {
3148         my ($action, $hash, $head, $page, $has_next_link) = @_;
3149         my $paging_nav;
3150
3151
3152         if ($hash ne $head || $page) {
3153                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3154         } else {
3155                 $paging_nav .= "HEAD";
3156         }
3157
3158         if ($page > 0) {
3159                 $paging_nav .= " &sdot; " .
3160                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3161                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3162         } else {
3163                 $paging_nav .= " &sdot; prev";
3164         }
3165
3166         if ($has_next_link) {
3167                 $paging_nav .= " &sdot; " .
3168                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3169                                  -accesskey => "n", -title => "Alt-n"}, "next");
3170         } else {
3171                 $paging_nav .= " &sdot; next";
3172         }
3173
3174         return $paging_nav;
3175 }
3176
3177 ## ......................................................................
3178 ## functions printing or outputting HTML: div
3179
3180 sub git_print_header_div {
3181         my ($action, $title, $hash, $hash_base) = @_;
3182         my %args = ();
3183
3184         $args{'action'} = $action;
3185         $args{'hash'} = $hash if $hash;
3186         $args{'hash_base'} = $hash_base if $hash_base;
3187
3188         print "<div class=\"header\">\n" .
3189               $cgi->a({-href => href(%args), -class => "title"},
3190               $title ? $title : $action) .
3191               "\n</div>\n";
3192 }
3193
3194 #sub git_print_authorship (\%) {
3195 sub git_print_authorship {
3196         my $co = shift;
3197
3198         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3199         print "<div class=\"author_date\">" .
3200               esc_html($co->{'author_name'}) .
3201               " [$ad{'rfc2822'}";
3202         if ($ad{'hour_local'} < 6) {
3203                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3204                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3205         } else {
3206                 printf(" (%02d:%02d %s)",
3207                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3208         }
3209         print "]</div>\n";
3210 }
3211
3212 sub git_print_page_path {
3213         my $name = shift;
3214         my $type = shift;
3215         my $hb = shift;
3216
3217
3218         print "<div class=\"page_path\">";
3219         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3220                       -title => 'tree root'}, to_utf8("[$project]"));
3221         print " / ";
3222         if (defined $name) {
3223                 my @dirname = split '/', $name;
3224                 my $basename = pop @dirname;
3225                 my $fullname = '';
3226
3227                 foreach my $dir (@dirname) {
3228                         $fullname .= ($fullname ? '/' : '') . $dir;
3229                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3230                                                      hash_base=>$hb),
3231                                       -title => $fullname}, esc_path($dir));
3232                         print " / ";
3233                 }
3234                 if (defined $type && $type eq 'blob') {
3235                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3236                                                      hash_base=>$hb),
3237                                       -title => $name}, esc_path($basename));
3238                 } elsif (defined $type && $type eq 'tree') {
3239                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3240                                                      hash_base=>$hb),
3241                                       -title => $name}, esc_path($basename));
3242                         print " / ";
3243                 } else {
3244                         print esc_path($basename);
3245                 }
3246         }
3247         print "<br/></div>\n";
3248 }
3249
3250 # sub git_print_log (\@;%) {
3251 sub git_print_log ($;%) {
3252         my $log = shift;
3253         my %opts = @_;
3254
3255         if ($opts{'-remove_title'}) {
3256                 # remove title, i.e. first line of log
3257                 shift @$log;
3258         }
3259         # remove leading empty lines
3260         while (defined $log->[0] && $log->[0] eq "") {
3261                 shift @$log;
3262         }
3263
3264         # print log
3265         my $signoff = 0;
3266         my $empty = 0;
3267         foreach my $line (@$log) {
3268                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3269                         $signoff = 1;
3270                         $empty = 0;
3271                         if (! $opts{'-remove_signoff'}) {
3272                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3273                                 next;
3274                         } else {
3275                                 # remove signoff lines
3276                                 next;
3277                         }
3278                 } else {
3279                         $signoff = 0;
3280                 }
3281
3282                 # print only one empty line
3283                 # do not print empty line after signoff
3284                 if ($line eq "") {
3285                         next if ($empty || $signoff);
3286                         $empty = 1;
3287                 } else {
3288                         $empty = 0;
3289                 }
3290
3291                 print format_log_line_html($line) . "<br/>\n";
3292         }
3293
3294         if ($opts{'-final_empty_line'}) {
3295                 # end with single empty line
3296                 print "<br/>\n" unless $empty;
3297         }
3298 }
3299
3300 # return link target (what link points to)
3301 sub git_get_link_target {
3302         my $hash = shift;
3303         my $link_target;
3304
3305         # read link
3306         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3307                 or return;
3308         {
3309                 local $/;
3310                 $link_target = <$fd>;
3311         }
3312         close $fd
3313                 or return;
3314
3315         return $link_target;
3316 }
3317
3318 # given link target, and the directory (basedir) the link is in,
3319 # return target of link relative to top directory (top tree);
3320 # return undef if it is not possible (including absolute links).
3321 sub normalize_link_target {
3322         my ($link_target, $basedir, $hash_base) = @_;
3323
3324         # we can normalize symlink target only if $hash_base is provided
3325         return unless $hash_base;
3326
3327         # absolute symlinks (beginning with '/') cannot be normalized
3328         return if (substr($link_target, 0, 1) eq '/');
3329
3330         # normalize link target to path from top (root) tree (dir)
3331         my $path;
3332         if ($basedir) {
3333                 $path = $basedir . '/' . $link_target;
3334         } else {
3335                 # we are in top (root) tree (dir)
3336                 $path = $link_target;
3337         }
3338
3339         # remove //, /./, and /../
3340         my @path_parts;
3341         foreach my $part (split('/', $path)) {
3342                 # discard '.' and ''
3343                 next if (!$part || $part eq '.');
3344                 # handle '..'
3345                 if ($part eq '..') {
3346                         if (@path_parts) {
3347                                 pop @path_parts;
3348                         } else {
3349                                 # link leads outside repository (outside top dir)
3350                                 return;
3351                         }
3352                 } else {
3353                         push @path_parts, $part;
3354                 }
3355         }
3356         $path = join('/', @path_parts);
3357
3358         return $path;
3359 }
3360
3361 # print tree entry (row of git_tree), but without encompassing <tr> element
3362 sub git_print_tree_entry {
3363         my ($t, $basedir, $hash_base, $have_blame) = @_;
3364
3365         my %base_key = ();
3366         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3367
3368         # The format of a table row is: mode list link.  Where mode is
3369         # the mode of the entry, list is the name of the entry, an href,
3370         # and link is the action links of the entry.
3371
3372         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3373         if ($t->{'type'} eq "blob") {
3374                 print "<td class=\"list\">" .
3375                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3376                                                file_name=>"$basedir$t->{'name'}", %base_key),
3377                                 -class => "list"}, esc_path($t->{'name'}));
3378                 if (S_ISLNK(oct $t->{'mode'})) {
3379                         my $link_target = git_get_link_target($t->{'hash'});
3380                         if ($link_target) {
3381                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3382                                 if (defined $norm_target) {
3383                                         print " -> " .
3384                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3385                                                                      file_name=>$norm_target),
3386                                                        -title => $norm_target}, esc_path($link_target));
3387                                 } else {
3388                                         print " -> " . esc_path($link_target);
3389                                 }
3390                         }
3391                 }
3392                 print "</td>\n";
3393                 print "<td class=\"link\">";
3394                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3395                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3396                               "blob");
3397                 if ($have_blame) {
3398                         print " | " .
3399                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3400                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3401                                       "blame");
3402                 }
3403                 if (defined $hash_base) {
3404                         print " | " .
3405                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3406                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3407                                       "history");
3408                 }
3409                 print " | " .
3410                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3411                                                file_name=>"$basedir$t->{'name'}")},
3412                                 "raw");
3413                 print "</td>\n";
3414
3415         } elsif ($t->{'type'} eq "tree") {
3416                 print "<td class=\"list\">";
3417                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3418                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3419                               esc_path($t->{'name'}));
3420                 print "</td>\n";
3421                 print "<td class=\"link\">";
3422                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3423                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3424                               "tree");
3425                 if (defined $hash_base) {
3426                         print " | " .
3427                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3428                                                      file_name=>"$basedir$t->{'name'}")},
3429                                       "history");
3430                 }
3431                 print "</td>\n";
3432         } else {
3433                 # unknown object: we can only present history for it
3434                 # (this includes 'commit' object, i.e. submodule support)
3435                 print "<td class=\"list\">" .
3436                       esc_path($t->{'name'}) .
3437                       "</td>\n";
3438                 print "<td class=\"link\">";
3439                 if (defined $hash_base) {
3440                         print $cgi->a({-href => href(action=>"history",
3441                                                      hash_base=>$hash_base,
3442                                                      file_name=>"$basedir$t->{'name'}")},
3443                                       "history");
3444                 }
3445                 print "</td>\n";
3446         }
3447 }
3448
3449 ## ......................................................................
3450 ## functions printing large fragments of HTML
3451
3452 # get pre-image filenames for merge (combined) diff
3453 sub fill_from_file_info {
3454         my ($diff, @parents) = @_;
3455
3456         $diff->{'from_file'} = [ ];
3457         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3458         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3459                 if ($diff->{'status'}[$i] eq 'R' ||
3460                     $diff->{'status'}[$i] eq 'C') {
3461                         $diff->{'from_file'}[$i] =
3462                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3463                 }
3464         }
3465
3466         return $diff;
3467 }
3468
3469 # is current raw difftree line of file deletion
3470 sub is_deleted {
3471         my $diffinfo = shift;
3472
3473         return $diffinfo->{'to_id'} eq ('0' x 40);
3474 }
3475
3476 # does patch correspond to [previous] difftree raw line
3477 # $diffinfo  - hashref of parsed raw diff format
3478 # $patchinfo - hashref of parsed patch diff format
3479 #              (the same keys as in $diffinfo)
3480 sub is_patch_split {
3481         my ($diffinfo, $patchinfo) = @_;
3482
3483         return defined $diffinfo && defined $patchinfo
3484                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3485 }
3486
3487
3488 sub git_difftree_body {
3489         my ($difftree, $hash, @parents) = @_;
3490         my ($parent) = $parents[0];
3491         my $have_blame = gitweb_check_feature('blame');
3492         print "<div class=\"list_head\">\n";
3493         if ($#{$difftree} > 10) {
3494                 print(($#{$difftree} + 1) . " files changed:\n");
3495         }
3496         print "</div>\n";
3497
3498         print "<table class=\"" .
3499               (@parents > 1 ? "combined " : "") .
3500               "diff_tree\">\n";
3501
3502         # header only for combined diff in 'commitdiff' view
3503         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3504         if ($has_header) {
3505                 # table header
3506                 print "<thead><tr>\n" .
3507                        "<th></th><th></th>\n"; # filename, patchN link
3508                 for (my $i = 0; $i < @parents; $i++) {
3509                         my $par = $parents[$i];
3510                         print "<th>" .
3511                               $cgi->a({-href => href(action=>"commitdiff",
3512                                                      hash=>$hash, hash_parent=>$par),
3513                                        -title => 'commitdiff to parent number ' .
3514                                                   ($i+1) . ': ' . substr($par,0,7)},
3515                                       $i+1) .
3516                               "&nbsp;</th>\n";
3517                 }
3518                 print "</tr></thead>\n<tbody>\n";
3519         }
3520
3521         my $alternate = 1;
3522         my $patchno = 0;
3523         foreach my $line (@{$difftree}) {
3524                 my $diff = parsed_difftree_line($line);
3525
3526                 if ($alternate) {
3527                         print "<tr class=\"dark\">\n";
3528                 } else {
3529                         print "<tr class=\"light\">\n";
3530                 }
3531                 $alternate ^= 1;
3532
3533                 if (exists $diff->{'nparents'}) { # combined diff
3534
3535                         fill_from_file_info($diff, @parents)
3536                                 unless exists $diff->{'from_file'};
3537
3538                         if (!is_deleted($diff)) {
3539                                 # file exists in the result (child) commit
3540                                 print "<td>" .
3541                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3542                                                              file_name=>$diff->{'to_file'},
3543                                                              hash_base=>$hash),
3544                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3545                                       "</td>\n";
3546                         } else {
3547                                 print "<td>" .
3548                                       esc_path($diff->{'to_file'}) .
3549                                       "</td>\n";
3550                         }
3551
3552                         if ($action eq 'commitdiff') {
3553                                 # link to patch
3554                                 $patchno++;
3555                                 print "<td class=\"link\">" .
3556                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3557                                       " | " .
3558                                       "</td>\n";
3559                         }
3560
3561                         my $has_history = 0;
3562                         my $not_deleted = 0;
3563                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3564                                 my $hash_parent = $parents[$i];
3565                                 my $from_hash = $diff->{'from_id'}[$i];
3566                                 my $from_path = $diff->{'from_file'}[$i];
3567                                 my $status = $diff->{'status'}[$i];
3568
3569                                 $has_history ||= ($status ne 'A');
3570                                 $not_deleted ||= ($status ne 'D');
3571
3572                                 if ($status eq 'A') {
3573                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3574                                 } elsif ($status eq 'D') {
3575                                         print "<td class=\"link\">" .
3576                                               $cgi->a({-href => href(action=>"blob",
3577                                                                      hash_base=>$hash,
3578                                                                      hash=>$from_hash,
3579                                                                      file_name=>$from_path)},
3580                                                       "blob" . ($i+1)) .
3581                                               " | </td>\n";
3582                                 } else {
3583                                         if ($diff->{'to_id'} eq $from_hash) {
3584                                                 print "<td class=\"link nochange\">";
3585                                         } else {
3586                                                 print "<td class=\"link\">";
3587                                         }
3588                                         print $cgi->a({-href => href(action=>"blobdiff",
3589                                                                      hash=>$diff->{'to_id'},
3590                                                                      hash_parent=>$from_hash,
3591                                                                      hash_base=>$hash,
3592                                                                      hash_parent_base=>$hash_parent,
3593                                                                      file_name=>$diff->{'to_file'},
3594                                                                      file_parent=>$from_path)},
3595                                                       "diff" . ($i+1)) .
3596                                               " | </td>\n";
3597                                 }
3598                         }
3599
3600                         print "<td class=\"link\">";
3601                         if ($not_deleted) {
3602                                 print $cgi->a({-href => href(action=>"blob",
3603                                                              hash=>$diff->{'to_id'},
3604                                                              file_name=>$diff->{'to_file'},
3605                                                              hash_base=>$hash)},
3606                                               "blob");
3607                                 print " | " if ($has_history);
3608                         }
3609                         if ($has_history) {
3610                                 print $cgi->a({-href => href(action=>"history",
3611                                                              file_name=>$diff->{'to_file'},
3612                                                              hash_base=>$hash)},
3613                                               "history");
3614                         }
3615                         print "</td>\n";
3616
3617                         print "</tr>\n";
3618                         next; # instead of 'else' clause, to avoid extra indent
3619                 }
3620                 # else ordinary diff
3621
3622                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3623                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3624                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3625                         $to_mode_oct = oct $diff->{'to_mode'};
3626                         if (S_ISREG($to_mode_oct)) { # only for regular file
3627                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3628                         }
3629                         $to_file_type = file_type($diff->{'to_mode'});
3630                 }
3631                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3632                         $from_mode_oct = oct $diff->{'from_mode'};
3633                         if (S_ISREG($to_mode_oct)) { # only for regular file
3634                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3635                         }
3636                         $from_file_type = file_type($diff->{'from_mode'});
3637                 }
3638
3639                 if ($diff->{'status'} eq "A") { # created
3640                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3641                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3642                         $mode_chng   .= "]</span>";
3643                         print "<td>";
3644                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3645                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3646                                       -class => "list"}, esc_path($diff->{'file'}));
3647                         print "</td>\n";
3648                         print "<td>$mode_chng</td>\n";
3649                         print "<td class=\"link\">";
3650                         if ($action eq 'commitdiff') {
3651                                 # link to patch
3652                                 $patchno++;
3653                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3654                                 print " | ";
3655                         }
3656                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3657                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3658                                       "blob");
3659                         print "</td>\n";
3660
3661                 } elsif ($diff->{'status'} eq "D") { # deleted
3662                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3663                         print "<td>";
3664                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3665                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3666                                        -class => "list"}, esc_path($diff->{'file'}));
3667                         print "</td>\n";
3668                         print "<td>$mode_chng</td>\n";
3669                         print "<td class=\"link\">";
3670                         if ($action eq 'commitdiff') {
3671                                 # link to patch
3672                                 $patchno++;
3673                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3674                                 print " | ";
3675                         }
3676                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3677                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3678                                       "blob") . " | ";
3679                         if ($have_blame) {
3680                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3681                                                              file_name=>$diff->{'file'})},
3682                                               "blame") . " | ";
3683                         }
3684                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3685                                                      file_name=>$diff->{'file'})},
3686                                       "history");
3687                         print "</td>\n";
3688
3689                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3690                         my $mode_chnge = "";
3691                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3692                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3693                                 if ($from_file_type ne $to_file_type) {
3694                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3695                                 }
3696                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3697                                         if ($from_mode_str && $to_mode_str) {
3698                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3699                                         } elsif ($to_mode_str) {
3700                                                 $mode_chnge .= " mode: $to_mode_str";
3701                                         }
3702                                 }
3703                                 $mode_chnge .= "]</span>\n";
3704                         }
3705                         print "<td>";
3706                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3707                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3708                                       -class => "list"}, esc_path($diff->{'file'}));
3709                         print "</td>\n";
3710                         print "<td>$mode_chnge</td>\n";
3711                         print "<td class=\"link\">";
3712                         if ($action eq 'commitdiff') {
3713                                 # link to patch
3714                                 $patchno++;
3715                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3716                                       " | ";
3717                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3718                                 # "commit" view and modified file (not onlu mode changed)
3719                                 print $cgi->a({-href => href(action=>"blobdiff",
3720                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3721                                                              hash_base=>$hash, hash_parent_base=>$parent,
3722                                                              file_name=>$diff->{'file'})},
3723                                               "diff") .
3724                                       " | ";
3725                         }
3726                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3727                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3728                                        "blob") . " | ";
3729                         if ($have_blame) {
3730                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3731                                                              file_name=>$diff->{'file'})},
3732                                               "blame") . " | ";
3733                         }
3734                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3735                                                      file_name=>$diff->{'file'})},
3736                                       "history");
3737                         print "</td>\n";
3738
3739                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3740                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3741                         my $nstatus = $status_name{$diff->{'status'}};
3742                         my $mode_chng = "";
3743                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3744                                 # mode also for directories, so we cannot use $to_mode_str
3745                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3746                         }
3747                         print "<td>" .
3748                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3749                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3750                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3751                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3752                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3753                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3754                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3755                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3756                               "<td class=\"link\">";
3757                         if ($action eq 'commitdiff') {
3758                                 # link to patch
3759                                 $patchno++;
3760                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3761                                       " | ";
3762                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3763                                 # "commit" view and modified file (not only pure rename or copy)
3764                                 print $cgi->a({-href => href(action=>"blobdiff",
3765                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3766                                                              hash_base=>$hash, hash_parent_base=>$parent,
3767                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3768                                               "diff") .
3769                                       " | ";
3770                         }
3771                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3772                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3773                                       "blob") . " | ";
3774                         if ($have_blame) {
3775                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3776                                                              file_name=>$diff->{'to_file'})},
3777                                               "blame") . " | ";
3778                         }
3779                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3780                                                     file_name=>$diff->{'to_file'})},
3781                                       "history");
3782                         print "</td>\n";
3783
3784                 } # we should not encounter Unmerged (U) or Unknown (X) status
3785                 print "</tr>\n";
3786         }
3787         print "</tbody>" if $has_header;
3788         print "</table>\n";
3789 }
3790
3791 sub git_patchset_body {
3792         my ($fd, $difftree, $hash, @hash_parents) = @_;
3793         my ($hash_parent) = $hash_parents[0];
3794
3795         my $is_combined = (@hash_parents > 1);
3796         my $patch_idx = 0;
3797         my $patch_number = 0;
3798         my $patch_line;
3799         my $diffinfo;
3800         my $to_name;
3801         my (%from, %to);
3802
3803         print "<div class=\"patchset\">\n";
3804
3805         # skip to first patch
3806         while ($patch_line = <$fd>) {
3807                 chomp $patch_line;
3808
3809                 last if ($patch_line =~ m/^diff /);
3810         }
3811
3812  PATCH:
3813         while ($patch_line) {
3814
3815                 # parse "git diff" header line
3816                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3817                         # $1 is from_name, which we do not use
3818                         $to_name = unquote($2);
3819                         $to_name =~ s!^b/!!;
3820                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3821                         # $1 is 'cc' or 'combined', which we do not use
3822                         $to_name = unquote($2);
3823                 } else {
3824                         $to_name = undef;
3825                 }
3826
3827                 # check if current patch belong to current raw line
3828                 # and parse raw git-diff line if needed
3829                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3830                         # this is continuation of a split patch
3831                         print "<div class=\"patch cont\">\n";
3832                 } else {
3833                         # advance raw git-diff output if needed
3834                         $patch_idx++ if defined $diffinfo;
3835
3836                         # read and prepare patch information
3837                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3838
3839                         # compact combined diff output can have some patches skipped
3840                         # find which patch (using pathname of result) we are at now;
3841                         if ($is_combined) {
3842                                 while ($to_name ne $diffinfo->{'to_file'}) {
3843                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3844                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3845                                               "</div>\n";  # class="patch"
3846
3847                                         $patch_idx++;
3848                                         $patch_number++;
3849
3850                                         last if $patch_idx > $#$difftree;
3851                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3852                                 }
3853                         }
3854
3855                         # modifies %from, %to hashes
3856                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3857
3858                         # this is first patch for raw difftree line with $patch_idx index
3859                         # we index @$difftree array from 0, but number patches from 1
3860                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3861                 }
3862
3863                 # git diff header
3864                 #assert($patch_line =~ m/^diff /) if DEBUG;
3865                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3866                 $patch_number++;
3867                 # print "git diff" header
3868                 print format_git_diff_header_line($patch_line, $diffinfo,
3869                                                   \%from, \%to);
3870
3871                 # print extended diff header
3872                 print "<div class=\"diff extended_header\">\n";
3873         EXTENDED_HEADER:
3874                 while ($patch_line = <$fd>) {
3875                         chomp $patch_line;
3876
3877                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3878
3879                         print format_extended_diff_header_line($patch_line, $diffinfo,
3880                                                                \%from, \%to);
3881                 }
3882                 print "</div>\n"; # class="diff extended_header"
3883
3884                 # from-file/to-file diff header
3885                 if (! $patch_line) {
3886                         print "</div>\n"; # class="patch"
3887                         last PATCH;
3888                 }
3889                 next PATCH if ($patch_line =~ m/^diff /);
3890                 #assert($patch_line =~ m/^---/) if DEBUG;
3891
3892                 my $last_patch_line = $patch_line;
3893                 $patch_line = <$fd>;
3894                 chomp $patch_line;
3895                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3896
3897                 print format_diff_from_to_header($last_patch_line, $patch_line,
3898                                                  $diffinfo, \%from, \%to,
3899                                                  @hash_parents);
3900
3901                 # the patch itself
3902         LINE:
3903                 while ($patch_line = <$fd>) {
3904                         chomp $patch_line;
3905
3906                         next PATCH if ($patch_line =~ m/^diff /);
3907
3908                         print format_diff_line($patch_line, \%from, \%to);
3909                 }
3910
3911         } continue {
3912                 print "</div>\n"; # class="patch"
3913         }
3914
3915         # for compact combined (--cc) format, with chunk and patch simpliciaction
3916         # patchset might be empty, but there might be unprocessed raw lines
3917         for (++$patch_idx if $patch_number > 0;
3918              $patch_idx < @$difftree;
3919              ++$patch_idx) {
3920                 # read and prepare patch information
3921                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3922
3923                 # generate anchor for "patch" links in difftree / whatchanged part
3924                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3925                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3926                       "</div>\n";  # class="patch"
3927
3928                 $patch_number++;
3929         }
3930
3931         if ($patch_number == 0) {
3932                 if (@hash_parents > 1) {
3933                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3934                 } else {
3935                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3936                 }
3937         }
3938
3939         print "</div>\n"; # class="patchset"
3940 }
3941
3942 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3943
3944 # fills project list info (age, description, owner, forks) for each
3945 # project in the list, removing invalid projects from returned list
3946 # NOTE: modifies $projlist, but does not remove entries from it
3947 sub fill_project_list_info {
3948         my ($projlist, $check_forks) = @_;
3949         my @projects;
3950
3951         my $show_ctags = gitweb_check_feature('ctags');
3952  PROJECT:
3953         foreach my $pr (@$projlist) {
3954                 my (@activity) = git_get_last_activity($pr->{'path'});
3955                 unless (@activity) {
3956                         next PROJECT;
3957                 }
3958                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3959                 if (!defined $pr->{'descr'}) {
3960                         my $descr = git_get_project_description($pr->{'path'}) || "";
3961                         $descr = to_utf8($descr);
3962                         $pr->{'descr_long'} = $descr;
3963                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3964                 }
3965                 if (!defined $pr->{'owner'}) {
3966                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3967                 }
3968                 if ($check_forks) {
3969                         my $pname = $pr->{'path'};
3970                         if (($pname =~ s/\.git$//) &&
3971                             ($pname !~ /\/$/) &&
3972                             (-d "$projectroot/$pname")) {
3973                                 $pr->{'forks'} = "-d $projectroot/$pname";
3974                         }       else {
3975                                 $pr->{'forks'} = 0;
3976                         }
3977                 }
3978                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3979                 push @projects, $pr;
3980         }
3981
3982         return @projects;
3983 }
3984
3985 # print 'sort by' <th> element, generating 'sort by $name' replay link
3986 # if that order is not selected
3987 sub print_sort_th {
3988         my ($name, $order, $header) = @_;
3989         $header ||= ucfirst($name);
3990
3991         if ($order eq $name) {
3992                 print "<th>$header</th>\n";
3993         } else {
3994                 print "<th>" .
3995                       $cgi->a({-href => href(-replay=>1, order=>$name),
3996                                -class => "header"}, $header) .
3997                       "</th>\n";
3998         }
3999 }
4000
4001 sub git_project_list_body {
4002         # actually uses global variable $project
4003         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4004
4005         my $check_forks = gitweb_check_feature('forks');
4006         my @projects = fill_project_list_info($projlist, $check_forks);
4007
4008         $order ||= $default_projects_order;
4009         $from = 0 unless defined $from;
4010         $to = $#projects if (!defined $to || $#projects < $to);
4011
4012         my %order_info = (
4013                 project => { key => 'path', type => 'str' },
4014                 descr => { key => 'descr_long', type => 'str' },
4015                 owner => { key => 'owner', type => 'str' },
4016                 age => { key => 'age', type => 'num' }
4017         );
4018         my $oi = $order_info{$order};
4019         if ($oi->{'type'} eq 'str') {
4020                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4021         } else {
4022                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4023         }
4024
4025         my $show_ctags = gitweb_check_feature('ctags');
4026         if ($show_ctags) {
4027                 my %ctags;
4028                 foreach my $p (@projects) {
4029                         foreach my $ct (keys %{$p->{'ctags'}}) {
4030                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4031                         }
4032                 }
4033                 my $cloud = git_populate_project_tagcloud(\%ctags);
4034                 print git_show_project_tagcloud($cloud, 64);
4035         }
4036
4037         print "<table class=\"project_list\">\n";
4038         unless ($no_header) {
4039                 print "<tr>\n";
4040                 if ($check_forks) {
4041                         print "<th></th>\n";
4042                 }
4043                 print_sort_th('project', $order, 'Project');
4044                 print_sort_th('descr', $order, 'Description');
4045                 print_sort_th('owner', $order, 'Owner');
4046                 print_sort_th('age', $order, 'Last Change');
4047                 print "<th></th>\n" . # for links
4048                       "</tr>\n";
4049         }
4050         my $alternate = 1;
4051         my $tagfilter = $cgi->param('by_tag');
4052         for (my $i = $from; $i <= $to; $i++) {
4053                 my $pr = $projects[$i];
4054
4055                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4056                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4057                         and not $pr->{'descr_long'} =~ /$searchtext/;
4058                 # Weed out forks or non-matching entries of search
4059                 if ($check_forks) {
4060                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4061                         $forkbase="^$forkbase" if $forkbase;
4062                         next if not $searchtext and not $tagfilter and $show_ctags
4063                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4064                 }
4065
4066                 if ($alternate) {
4067                         print "<tr class=\"dark\">\n";
4068                 } else {
4069                         print "<tr class=\"light\">\n";
4070                 }
4071                 $alternate ^= 1;
4072                 if ($check_forks) {
4073                         print "<td>";
4074                         if ($pr->{'forks'}) {
4075                                 print "<!-- $pr->{'forks'} -->\n";
4076                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4077                         }
4078                         print "</td>\n";
4079                 }
4080                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4081                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4082                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4083                                         -class => "list", -title => $pr->{'descr_long'}},
4084                                         esc_html($pr->{'descr'})) . "</td>\n" .
4085                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4086                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4087                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4088                       "<td class=\"link\">" .
4089                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4090                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4091                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4092                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4093                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4094                       "</td>\n" .
4095                       "</tr>\n";
4096         }
4097         if (defined $extra) {
4098                 print "<tr>\n";
4099                 if ($check_forks) {
4100                         print "<td></td>\n";
4101                 }
4102                 print "<td colspan=\"5\">$extra</td>\n" .
4103                       "</tr>\n";
4104         }
4105         print "</table>\n";
4106 }
4107
4108 sub git_shortlog_body {
4109         # uses global variable $project
4110         my ($commitlist, $from, $to, $refs, $extra) = @_;
4111
4112         $from = 0 unless defined $from;
4113         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4114
4115         print "<table class=\"shortlog\">\n";
4116         my $alternate = 1;
4117         for (my $i = $from; $i <= $to; $i++) {
4118                 my %co = %{$commitlist->[$i]};
4119                 my $commit = $co{'id'};
4120                 my $ref = format_ref_marker($refs, $commit);
4121                 if ($alternate) {
4122                         print "<tr class=\"dark\">\n";
4123                 } else {
4124                         print "<tr class=\"light\">\n";
4125                 }
4126                 $alternate ^= 1;
4127                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4128                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4129                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4130                       "<td><i>" . $author . "</i></td>\n" .
4131                       "<td>";
4132                 print format_subject_html($co{'title'}, $co{'title_short'},
4133                                           href(action=>"commit", hash=>$commit), $ref);
4134                 print "</td>\n" .
4135                       "<td class=\"link\">" .
4136                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4137                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4138                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4139                 my $snapshot_links = format_snapshot_links($commit);
4140                 if (defined $snapshot_links) {
4141                         print " | " . $snapshot_links;
4142                 }
4143                 print "</td>\n" .
4144                       "</tr>\n";
4145         }
4146         if (defined $extra) {
4147                 print "<tr>\n" .
4148                       "<td colspan=\"4\">$extra</td>\n" .
4149                       "</tr>\n";
4150         }
4151         print "</table>\n";
4152 }
4153
4154 sub git_history_body {
4155         # Warning: assumes constant type (blob or tree) during history
4156         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4157
4158         $from = 0 unless defined $from;
4159         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4160
4161         print "<table class=\"history\">\n";
4162         my $alternate = 1;
4163         for (my $i = $from; $i <= $to; $i++) {
4164                 my %co = %{$commitlist->[$i]};
4165                 if (!%co) {
4166                         next;
4167                 }
4168                 my $commit = $co{'id'};
4169
4170                 my $ref = format_ref_marker($refs, $commit);
4171
4172                 if ($alternate) {
4173                         print "<tr class=\"dark\">\n";
4174                 } else {
4175                         print "<tr class=\"light\">\n";
4176                 }
4177                 $alternate ^= 1;
4178         # shortlog uses      chop_str($co{'author_name'}, 10)
4179                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4180                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4181                       "<td><i>" . $author . "</i></td>\n" .
4182                       "<td>";
4183                 # originally git_history used chop_str($co{'title'}, 50)
4184                 print format_subject_html($co{'title'}, $co{'title_short'},
4185                                           href(action=>"commit", hash=>$commit), $ref);
4186                 print "</td>\n" .
4187                       "<td class=\"link\">" .
4188                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4189                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4190
4191                 if ($ftype eq 'blob') {
4192                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4193                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4194                         if (defined $blob_current && defined $blob_parent &&
4195                                         $blob_current ne $blob_parent) {
4196                                 print " | " .
4197                                         $cgi->a({-href => href(action=>"blobdiff",
4198                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4199                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4200                                                                file_name=>$file_name)},
4201                                                 "diff to current");
4202                         }
4203                 }
4204                 print "</td>\n" .
4205                       "</tr>\n";
4206         }
4207         if (defined $extra) {
4208                 print "<tr>\n" .
4209                       "<td colspan=\"4\">$extra</td>\n" .
4210                       "</tr>\n";
4211         }
4212         print "</table>\n";
4213 }
4214
4215 sub git_tags_body {
4216         # uses global variable $project
4217         my ($taglist, $from, $to, $extra) = @_;
4218         $from = 0 unless defined $from;
4219         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4220
4221         print "<table class=\"tags\">\n";
4222         my $alternate = 1;
4223         for (my $i = $from; $i <= $to; $i++) {
4224                 my $entry = $taglist->[$i];
4225                 my %tag = %$entry;
4226                 my $comment = $tag{'subject'};
4227                 my $comment_short;
4228                 if (defined $comment) {
4229                         $comment_short = chop_str($comment, 30, 5);
4230                 }
4231                 if ($alternate) {
4232                         print "<tr class=\"dark\">\n";
4233                 } else {
4234                         print "<tr class=\"light\">\n";
4235                 }
4236                 $alternate ^= 1;
4237                 if (defined $tag{'age'}) {
4238                         print "<td><i>$tag{'age'}</i></td>\n";
4239                 } else {
4240                         print "<td></td>\n";
4241                 }
4242                 print "<td>" .
4243                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4244                                -class => "list name"}, esc_html($tag{'name'})) .
4245                       "</td>\n" .
4246                       "<td>";
4247                 if (defined $comment) {
4248                         print format_subject_html($comment, $comment_short,
4249                                                   href(action=>"tag", hash=>$tag{'id'}));
4250                 }
4251                 print "</td>\n" .
4252                       "<td class=\"selflink\">";
4253                 if ($tag{'type'} eq "tag") {
4254                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4255                 } else {
4256                         print "&nbsp;";
4257                 }
4258                 print "</td>\n" .
4259                       "<td class=\"link\">" . " | " .
4260                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4261                 if ($tag{'reftype'} eq "commit") {
4262                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4263                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4264                 } elsif ($tag{'reftype'} eq "blob") {
4265                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4266                 }
4267                 print "</td>\n" .
4268                       "</tr>";
4269         }
4270         if (defined $extra) {
4271                 print "<tr>\n" .
4272                       "<td colspan=\"5\">$extra</td>\n" .
4273                       "</tr>\n";
4274         }
4275         print "</table>\n";
4276 }
4277
4278 sub git_heads_body {
4279         # uses global variable $project
4280         my ($headlist, $head, $from, $to, $extra) = @_;
4281         $from = 0 unless defined $from;
4282         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4283
4284         print "<table class=\"heads\">\n";
4285         my $alternate = 1;
4286         for (my $i = $from; $i <= $to; $i++) {
4287                 my $entry = $headlist->[$i];
4288                 my %ref = %$entry;
4289                 my $curr = $ref{'id'} eq $head;
4290                 if ($alternate) {
4291                         print "<tr class=\"dark\">\n";
4292                 } else {
4293                         print "<tr class=\"light\">\n";
4294                 }
4295                 $alternate ^= 1;
4296                 print "<td><i>$ref{'age'}</i></td>\n" .
4297                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4298                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4299                                -class => "list name"},esc_html($ref{'name'})) .
4300                       "</td>\n" .
4301                       "<td class=\"link\">" .
4302                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4303                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4304                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4305                       "</td>\n" .
4306                       "</tr>";
4307         }
4308         if (defined $extra) {
4309                 print "<tr>\n" .
4310                       "<td colspan=\"3\">$extra</td>\n" .
4311                       "</tr>\n";
4312         }
4313         print "</table>\n";
4314 }
4315
4316 sub git_search_grep_body {
4317         my ($commitlist, $from, $to, $extra) = @_;
4318         $from = 0 unless defined $from;
4319         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4320
4321         print "<table class=\"commit_search\">\n";
4322         my $alternate = 1;
4323         for (my $i = $from; $i <= $to; $i++) {
4324                 my %co = %{$commitlist->[$i]};
4325                 if (!%co) {
4326                         next;
4327                 }
4328                 my $commit = $co{'id'};
4329                 if ($alternate) {
4330                         print "<tr class=\"dark\">\n";
4331                 } else {
4332                         print "<tr class=\"light\">\n";
4333                 }
4334                 $alternate ^= 1;
4335                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4336                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4337                       "<td><i>" . $author . "</i></td>\n" .
4338                       "<td>" .
4339                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4340                                -class => "list subject"},
4341                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4342                 my $comment = $co{'comment'};
4343                 foreach my $line (@$comment) {
4344                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4345                                 my ($lead, $match, $trail) = ($1, $2, $3);
4346                                 $match = chop_str($match, 70, 5, 'center');
4347                                 my $contextlen = int((80 - length($match))/2);
4348                                 $contextlen = 30 if ($contextlen > 30);
4349                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4350                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4351
4352                                 $lead  = esc_html($lead);
4353                                 $match = esc_html($match);
4354                                 $trail = esc_html($trail);
4355
4356                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4357                         }
4358                 }
4359                 print "</td>\n" .
4360                       "<td class=\"link\">" .
4361                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4362                       " | " .
4363                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4364                       " | " .
4365                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4366                 print "</td>\n" .
4367                       "</tr>\n";
4368         }
4369         if (defined $extra) {
4370                 print "<tr>\n" .
4371                       "<td colspan=\"3\">$extra</td>\n" .
4372                       "</tr>\n";
4373         }
4374         print "</table>\n";
4375 }
4376
4377 ## ======================================================================
4378 ## ======================================================================
4379 ## actions
4380
4381 sub git_project_list {
4382         my $order = $input_params{'order'};
4383         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4384                 die_error(400, "Unknown order parameter");
4385         }
4386
4387         my @list = git_get_projects_list();
4388         if (!@list) {
4389                 die_error(404, "No projects found");
4390         }
4391
4392         git_header_html();
4393         if (-f $home_text) {
4394                 print "<div class=\"index_include\">\n";
4395                 insert_file($home_text);
4396                 print "</div>\n";
4397         }
4398         print $cgi->startform(-method => "get") .
4399               "<p class=\"projsearch\">Search:\n" .
4400               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4401               "</p>" .
4402               $cgi->end_form() . "\n";
4403         git_project_list_body(\@list, $order);
4404         git_footer_html();
4405 }
4406
4407 sub git_forks {
4408         my $order = $input_params{'order'};
4409         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4410                 die_error(400, "Unknown order parameter");
4411         }
4412
4413         my @list = git_get_projects_list($project);
4414         if (!@list) {
4415                 die_error(404, "No forks found");
4416         }
4417
4418         git_header_html();
4419         git_print_page_nav('','');
4420         git_print_header_div('summary', "$project forks");
4421         git_project_list_body(\@list, $order);
4422         git_footer_html();
4423 }
4424
4425 sub git_project_index {
4426         my @projects = git_get_projects_list($project);
4427
4428         print $cgi->header(
4429                 -type => 'text/plain',
4430                 -charset => 'utf-8',
4431                 -content_disposition => 'inline; filename="index.aux"');
4432
4433         foreach my $pr (@projects) {
4434                 if (!exists $pr->{'owner'}) {
4435                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4436                 }
4437
4438                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4439                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4440                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4441                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4442                 $path  =~ s/ /\+/g;
4443                 $owner =~ s/ /\+/g;
4444
4445                 print "$path $owner\n";
4446         }
4447 }
4448
4449 sub git_summary {
4450         my $descr = git_get_project_description($project) || "none";
4451         my %co = parse_commit("HEAD");
4452         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4453         my $head = $co{'id'};
4454
4455         my $owner = git_get_project_owner($project);
4456
4457         my $refs = git_get_references();
4458         # These get_*_list functions return one more to allow us to see if
4459         # there are more ...
4460         my @taglist  = git_get_tags_list(16);
4461         my @headlist = git_get_heads_list(16);
4462         my @forklist;
4463         my $check_forks = gitweb_check_feature('forks');
4464
4465         if ($check_forks) {
4466                 @forklist = git_get_projects_list($project);
4467         }
4468
4469         git_header_html();
4470         git_print_page_nav('summary','', $head);
4471
4472         print "<div class=\"title\">&nbsp;</div>\n";
4473         print "<table class=\"projects_list\">\n" .
4474               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4475               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4476         if (defined $cd{'rfc2822'}) {
4477                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4478         }
4479
4480         # use per project git URL list in $projectroot/$project/cloneurl
4481         # or make project git URL from git base URL and project name
4482         my $url_tag = "URL";
4483         my @url_list = git_get_project_url_list($project);
4484         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4485         foreach my $git_url (@url_list) {
4486                 next unless $git_url;
4487                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4488                 $url_tag = "";
4489         }
4490
4491         # Tag cloud
4492         my $show_ctags = gitweb_check_feature('ctags');
4493         if ($show_ctags) {
4494                 my $ctags = git_get_project_ctags($project);
4495                 my $cloud = git_populate_project_tagcloud($ctags);
4496                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4497                 print "</td>\n<td>" unless %$ctags;
4498                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4499                 print "</td>\n<td>" if %$ctags;
4500                 print git_show_project_tagcloud($cloud, 48);
4501                 print "</td></tr>";
4502         }
4503
4504         print "</table>\n";
4505
4506         if (-s "$projectroot/$project/README.html") {
4507                 print "<div class=\"title\">readme</div>\n" .
4508                       "<div class=\"readme\">\n";
4509                 insert_file("$projectroot/$project/README.html");
4510                 print "\n</div>\n"; # class="readme"
4511         }
4512
4513         # we need to request one more than 16 (0..15) to check if
4514         # those 16 are all
4515         my @commitlist = $head ? parse_commits($head, 17) : ();
4516         if (@commitlist) {
4517                 git_print_header_div('shortlog');
4518                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4519                                   $#commitlist <=  15 ? undef :
4520                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4521         }
4522
4523         if (@taglist) {
4524                 git_print_header_div('tags');
4525                 git_tags_body(\@taglist, 0, 15,
4526                               $#taglist <=  15 ? undef :
4527                               $cgi->a({-href => href(action=>"tags")}, "..."));
4528         }
4529
4530         if (@headlist) {
4531                 git_print_header_div('heads');
4532                 git_heads_body(\@headlist, $head, 0, 15,
4533                                $#headlist <= 15 ? undef :
4534                                $cgi->a({-href => href(action=>"heads")}, "..."));
4535         }
4536
4537         if (@forklist) {
4538                 git_print_header_div('forks');
4539                 git_project_list_body(\@forklist, 'age', 0, 15,
4540                                       $#forklist <= 15 ? undef :
4541                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4542                                       'no_header');
4543         }
4544
4545         git_footer_html();
4546 }
4547
4548 sub git_tag {
4549         my $head = git_get_head_hash($project);
4550         git_header_html();
4551         git_print_page_nav('','', $head,undef,$head);
4552         my %tag = parse_tag($hash);
4553
4554         if (! %tag) {
4555                 die_error(404, "Unknown tag object");
4556         }
4557
4558         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4559         print "<div class=\"title_text\">\n" .
4560               "<table class=\"object_header\">\n" .
4561               "<tr>\n" .
4562               "<td>object</td>\n" .
4563               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4564                                $tag{'object'}) . "</td>\n" .
4565               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4566                                               $tag{'type'}) . "</td>\n" .
4567               "</tr>\n";
4568         if (defined($tag{'author'})) {
4569                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4570                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4571                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4572                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4573                         "</td></tr>\n";
4574         }
4575         print "</table>\n\n" .
4576               "</div>\n";
4577         print "<div class=\"page_body\">";
4578         my $comment = $tag{'comment'};
4579         foreach my $line (@$comment) {
4580                 chomp $line;
4581                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4582         }
4583         print "</div>\n";
4584         git_footer_html();
4585 }
4586
4587 sub git_blame {
4588         # permissions
4589         gitweb_check_feature('blame')
4590                 or die_error(403, "Blame view not allowed");
4591
4592         # error checking
4593         die_error(400, "No file name given") unless $file_name;
4594         $hash_base ||= git_get_head_hash($project);
4595         die_error(404, "Couldn't find base commit") unless $hash_base;
4596         my %co = parse_commit($hash_base)
4597                 or die_error(404, "Commit not found");
4598         my $ftype = "blob";
4599         if (!defined $hash) {
4600                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4601                         or die_error(404, "Error looking up file");
4602         } else {
4603                 $ftype = git_get_type($hash);
4604                 if ($ftype !~ "blob") {
4605                         die_error(400, "Object is not a blob");
4606                 }
4607         }
4608
4609         # run git-blame --porcelain
4610         open my $fd, "-|", git_cmd(), "blame", '-p',
4611                 $hash_base, '--', $file_name
4612                 or die_error(500, "Open git-blame failed");
4613
4614         # page header
4615         git_header_html();
4616         my $formats_nav =
4617                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4618                         "blob") .
4619                 " | " .
4620                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4621                         "history") .
4622                 " | " .
4623                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4624                         "HEAD");
4625         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4626         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4627         git_print_page_path($file_name, $ftype, $hash_base);
4628
4629         # page body
4630         my @rev_color = qw(light2 dark2);
4631         my $num_colors = scalar(@rev_color);
4632         my $current_color = 0;
4633         my %metainfo = ();
4634
4635         print <<HTML;
4636 <div class="page_body">
4637 <table class="blame">
4638 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4639 HTML
4640  LINE:
4641         while (my $line = <$fd>) {
4642                 chomp $line;
4643                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4644                 # no <lines in group> for subsequent lines in group of lines
4645                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4646                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4647                 if (!exists $metainfo{$full_rev}) {
4648                         $metainfo{$full_rev} = {};
4649                 }
4650                 my $meta = $metainfo{$full_rev};
4651                 my $data;
4652                 while ($data = <$fd>) {
4653                         chomp $data;
4654                         last if ($data =~ s/^\t//); # contents of line
4655                         if ($data =~ /^(\S+) (.*)$/) {
4656                                 $meta->{$1} = $2;
4657                         }
4658                 }
4659                 my $short_rev = substr($full_rev, 0, 8);
4660                 my $author = $meta->{'author'};
4661                 my %date =
4662                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4663                 my $date = $date{'iso-tz'};
4664                 if ($group_size) {
4665                         $current_color = ($current_color + 1) % $num_colors;
4666                 }
4667                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4668                 if ($group_size) {
4669                         print "<td class=\"sha1\"";
4670                         print " title=\"". esc_html($author) . ", $date\"";
4671                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4672                         print ">";
4673                         print $cgi->a({-href => href(action=>"commit",
4674                                                      hash=>$full_rev,
4675                                                      file_name=>$file_name)},
4676                                       esc_html($short_rev));
4677                         print "</td>\n";
4678                 }
4679                 my $parent_commit;
4680                 if (!exists $meta->{'parent'}) {
4681                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4682                                 or die_error(500, "Open git-rev-parse failed");
4683                         $parent_commit = <$dd>;
4684                         close $dd;
4685                         chomp($parent_commit);
4686                         $meta->{'parent'} = $parent_commit;
4687                 } else {
4688                         $parent_commit = $meta->{'parent'};
4689                 }
4690                 my $blamed = href(action => 'blame',
4691                                   file_name => $meta->{'filename'},
4692                                   hash_base => $parent_commit);
4693                 print "<td class=\"linenr\">";
4694                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4695                                 -class => "linenr" },
4696                               esc_html($lineno));
4697                 print "</td>";
4698                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4699                 print "</tr>\n";
4700         }
4701         print "</table>\n";
4702         print "</div>";
4703         close $fd
4704                 or print "Reading blob failed\n";
4705
4706         # page footer
4707         git_footer_html();
4708 }
4709
4710 sub git_tags {
4711         my $head = git_get_head_hash($project);
4712         git_header_html();
4713         git_print_page_nav('','', $head,undef,$head);
4714         git_print_header_div('summary', $project);
4715
4716         my @tagslist = git_get_tags_list();
4717         if (@tagslist) {
4718                 git_tags_body(\@tagslist);
4719         }
4720         git_footer_html();
4721 }
4722
4723 sub git_heads {
4724         my $head = git_get_head_hash($project);
4725         git_header_html();
4726         git_print_page_nav('','', $head,undef,$head);
4727         git_print_header_div('summary', $project);
4728
4729         my @headslist = git_get_heads_list();
4730         if (@headslist) {
4731                 git_heads_body(\@headslist, $head);
4732         }
4733         git_footer_html();
4734 }
4735
4736 sub git_blob_plain {
4737         my $type = shift;
4738         my $expires;
4739
4740         if (!defined $hash) {
4741                 if (defined $file_name) {
4742                         my $base = $hash_base || git_get_head_hash($project);
4743                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4744                                 or die_error(404, "Cannot find file");
4745                 } else {
4746                         die_error(400, "No file name defined");
4747                 }
4748         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4749                 # blobs defined by non-textual hash id's can be cached
4750                 $expires = "+1d";
4751         }
4752
4753         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4754                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4755
4756         # content-type (can include charset)
4757         $type = blob_contenttype($fd, $file_name, $type);
4758
4759         # "save as" filename, even when no $file_name is given
4760         my $save_as = "$hash";
4761         if (defined $file_name) {
4762                 $save_as = $file_name;
4763         } elsif ($type =~ m/^text\//) {
4764                 $save_as .= '.txt';
4765         }
4766
4767         print $cgi->header(
4768                 -type => $type,
4769                 -expires => $expires,
4770                 -content_disposition => 'inline; filename="' . $save_as . '"');
4771         undef $/;
4772         binmode STDOUT, ':raw';
4773         print <$fd>;
4774         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4775         $/ = "\n";
4776         close $fd;
4777 }
4778
4779 sub git_blob {
4780         my $expires;
4781
4782         if (!defined $hash) {
4783                 if (defined $file_name) {
4784                         my $base = $hash_base || git_get_head_hash($project);
4785                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4786                                 or die_error(404, "Cannot find file");
4787                 } else {
4788                         die_error(400, "No file name defined");
4789                 }
4790         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4791                 # blobs defined by non-textual hash id's can be cached
4792                 $expires = "+1d";
4793         }
4794
4795         my $have_blame = gitweb_check_feature('blame');
4796         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4797                 or die_error(500, "Couldn't cat $file_name, $hash");
4798         my $mimetype = blob_mimetype($fd, $file_name);
4799         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4800                 close $fd;
4801                 return git_blob_plain($mimetype);
4802         }
4803         # we can have blame only for text/* mimetype
4804         $have_blame &&= ($mimetype =~ m!^text/!);
4805
4806         git_header_html(undef, $expires);
4807         my $formats_nav = '';
4808         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4809                 if (defined $file_name) {
4810                         if ($have_blame) {
4811                                 $formats_nav .=
4812                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4813                                                 "blame") .
4814                                         " | ";
4815                         }
4816                         $formats_nav .=
4817                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4818                                         "history") .
4819                                 " | " .
4820                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4821                                         "raw") .
4822                                 " | " .
4823                                 $cgi->a({-href => href(action=>"blob",
4824                                                        hash_base=>"HEAD", file_name=>$file_name)},
4825                                         "HEAD");
4826                 } else {
4827                         $formats_nav .=
4828                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4829                                         "raw");
4830                 }
4831                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4832                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4833         } else {
4834                 print "<div class=\"page_nav\">\n" .
4835                       "<br/><br/></div>\n" .
4836                       "<div class=\"title\">$hash</div>\n";
4837         }
4838         git_print_page_path($file_name, "blob", $hash_base);
4839         print "<div class=\"page_body\">\n";
4840         if ($mimetype =~ m!^image/!) {
4841                 print qq!<img type="$mimetype"!;
4842                 if ($file_name) {
4843                         print qq! alt="$file_name" title="$file_name"!;
4844                 }
4845                 print qq! src="! .
4846                       href(action=>"blob_plain", hash=>$hash,
4847                            hash_base=>$hash_base, file_name=>$file_name) .
4848                       qq!" />\n!;
4849         } else {
4850                 my $nr;
4851                 while (my $line = <$fd>) {
4852                         chomp $line;
4853                         $nr++;
4854                         $line = untabify($line);
4855                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4856                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4857                 }
4858         }
4859         close $fd
4860                 or print "Reading blob failed.\n";
4861         print "</div>";
4862         git_footer_html();
4863 }
4864
4865 sub git_tree {
4866         if (!defined $hash_base) {
4867                 $hash_base = "HEAD";
4868         }
4869         if (!defined $hash) {
4870                 if (defined $file_name) {
4871                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4872                 } else {
4873                         $hash = $hash_base;
4874                 }
4875         }
4876         die_error(404, "No such tree") unless defined($hash);
4877         $/ = "\0";
4878         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4879                 or die_error(500, "Open git-ls-tree failed");
4880         my @entries = map { chomp; $_ } <$fd>;
4881         close $fd or die_error(404, "Reading tree failed");
4882         $/ = "\n";
4883
4884         my $refs = git_get_references();
4885         my $ref = format_ref_marker($refs, $hash_base);
4886         git_header_html();
4887         my $basedir = '';
4888         my $have_blame = gitweb_check_feature('blame');
4889         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4890                 my @views_nav = ();
4891                 if (defined $file_name) {
4892                         push @views_nav,
4893                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4894                                         "history"),
4895                                 $cgi->a({-href => href(action=>"tree",
4896                                                        hash_base=>"HEAD", file_name=>$file_name)},
4897                                         "HEAD"),
4898                 }
4899                 my $snapshot_links = format_snapshot_links($hash);
4900                 if (defined $snapshot_links) {
4901                         # FIXME: Should be available when we have no hash base as well.
4902                         push @views_nav, $snapshot_links;
4903                 }
4904                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4905                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4906         } else {
4907                 undef $hash_base;
4908                 print "<div class=\"page_nav\">\n";
4909                 print "<br/><br/></div>\n";
4910                 print "<div class=\"title\">$hash</div>\n";
4911         }
4912         if (defined $file_name) {
4913                 $basedir = $file_name;
4914                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4915                         $basedir .= '/';
4916                 }
4917                 git_print_page_path($file_name, 'tree', $hash_base);
4918         }
4919         print "<div class=\"page_body\">\n";
4920         print "<table class=\"tree\">\n";
4921         my $alternate = 1;
4922         # '..' (top directory) link if possible
4923         if (defined $hash_base &&
4924             defined $file_name && $file_name =~ m![^/]+$!) {
4925                 if ($alternate) {
4926                         print "<tr class=\"dark\">\n";
4927                 } else {
4928                         print "<tr class=\"light\">\n";
4929                 }
4930                 $alternate ^= 1;
4931
4932                 my $up = $file_name;
4933                 $up =~ s!/?[^/]+$!!;
4934                 undef $up unless $up;
4935                 # based on git_print_tree_entry
4936                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4937                 print '<td class="list">';
4938                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4939                                              file_name=>$up)},
4940                               "..");
4941                 print "</td>\n";
4942                 print "<td class=\"link\"></td>\n";
4943
4944                 print "</tr>\n";
4945         }
4946         foreach my $line (@entries) {
4947                 my %t = parse_ls_tree_line($line, -z => 1);
4948
4949                 if ($alternate) {
4950                         print "<tr class=\"dark\">\n";
4951                 } else {
4952                         print "<tr class=\"light\">\n";
4953                 }
4954                 $alternate ^= 1;
4955
4956                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4957
4958                 print "</tr>\n";
4959         }
4960         print "</table>\n" .
4961               "</div>";
4962         git_footer_html();
4963 }
4964
4965 sub git_snapshot {
4966         my $format = $input_params{'snapshot_format'};
4967         if (!@snapshot_fmts) {
4968                 die_error(403, "Snapshots not allowed");
4969         }
4970         # default to first supported snapshot format
4971         $format ||= $snapshot_fmts[0];
4972         if ($format !~ m/^[a-z0-9]+$/) {
4973                 die_error(400, "Invalid snapshot format parameter");
4974         } elsif (!exists($known_snapshot_formats{$format})) {
4975                 die_error(400, "Unknown snapshot format");
4976         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4977                 die_error(403, "Unsupported snapshot format");
4978         }
4979
4980         if (!defined $hash) {
4981                 $hash = git_get_head_hash($project);
4982         }
4983
4984         my $name = $project;
4985         $name =~ s,([^/])/*\.git$,$1,;
4986         $name = basename($name);
4987         my $filename = to_utf8($name);
4988         $name =~ s/\047/\047\\\047\047/g;
4989         my $cmd;
4990         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4991         $cmd = quote_command(
4992                 git_cmd(), 'archive',
4993                 "--format=$known_snapshot_formats{$format}{'format'}",
4994                 "--prefix=$name/", $hash);
4995         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4996                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4997         }
4998
4999         print $cgi->header(
5000                 -type => $known_snapshot_formats{$format}{'type'},
5001                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5002                 -status => '200 OK');
5003
5004         open my $fd, "-|", $cmd
5005                 or die_error(500, "Execute git-archive failed");
5006         binmode STDOUT, ':raw';
5007         print <$fd>;
5008         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5009         close $fd;
5010 }
5011
5012 sub git_log {
5013         my $head = git_get_head_hash($project);
5014         if (!defined $hash) {
5015                 $hash = $head;
5016         }
5017         if (!defined $page) {
5018                 $page = 0;
5019         }
5020         my $refs = git_get_references();
5021
5022         my @commitlist = parse_commits($hash, 101, (100 * $page));
5023
5024         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5025
5026         my ($patch_max) = gitweb_get_feature('patches');
5027         if ($patch_max) {
5028                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5029                         $paging_nav .= " &sdot; " .
5030                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5031                                         "patches");
5032                 }
5033         }
5034
5035         git_header_html();
5036         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5037
5038         if (!@commitlist) {
5039                 my %co = parse_commit($hash);
5040
5041                 git_print_header_div('summary', $project);
5042                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5043         }
5044         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5045         for (my $i = 0; $i <= $to; $i++) {
5046                 my %co = %{$commitlist[$i]};
5047                 next if !%co;
5048                 my $commit = $co{'id'};
5049                 my $ref = format_ref_marker($refs, $commit);
5050                 my %ad = parse_date($co{'author_epoch'});
5051                 git_print_header_div('commit',
5052                                "<span class=\"age\">$co{'age_string'}</span>" .
5053                                esc_html($co{'title'}) . $ref,
5054                                $commit);
5055                 print "<div class=\"title_text\">\n" .
5056                       "<div class=\"log_link\">\n" .
5057                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5058                       " | " .
5059                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5060                       " | " .
5061                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5062                       "<br/>\n" .
5063                       "</div>\n" .
5064                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5065                       "</div>\n";
5066
5067                 print "<div class=\"log_body\">\n";
5068                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5069                 print "</div>\n";
5070         }
5071         if ($#commitlist >= 100) {
5072                 print "<div class=\"page_nav\">\n";
5073                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5074                                -accesskey => "n", -title => "Alt-n"}, "next");
5075                 print "</div>\n";
5076         }
5077         git_footer_html();
5078 }
5079
5080 sub git_commit {
5081         $hash ||= $hash_base || "HEAD";
5082         my %co = parse_commit($hash)
5083             or die_error(404, "Unknown commit object");
5084         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5085         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5086
5087         my $parent  = $co{'parent'};
5088         my $parents = $co{'parents'}; # listref
5089
5090         # we need to prepare $formats_nav before any parameter munging
5091         my $formats_nav;
5092         if (!defined $parent) {
5093                 # --root commitdiff
5094                 $formats_nav .= '(initial)';
5095         } elsif (@$parents == 1) {
5096                 # single parent commit
5097                 $formats_nav .=
5098                         '(parent: ' .
5099                         $cgi->a({-href => href(action=>"commit",
5100                                                hash=>$parent)},
5101                                 esc_html(substr($parent, 0, 7))) .
5102                         ')';
5103         } else {
5104                 # merge commit
5105                 $formats_nav .=
5106                         '(merge: ' .
5107                         join(' ', map {
5108                                 $cgi->a({-href => href(action=>"commit",
5109                                                        hash=>$_)},
5110                                         esc_html(substr($_, 0, 7)));
5111                         } @$parents ) .
5112                         ')';
5113         }
5114         if (gitweb_check_feature('patches')) {
5115                 $formats_nav .= " | " .
5116                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5117                                 "patch");
5118         }
5119
5120         if (!defined $parent) {
5121                 $parent = "--root";
5122         }
5123         my @difftree;
5124         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5125                 @diff_opts,
5126                 (@$parents <= 1 ? $parent : '-c'),
5127                 $hash, "--"
5128                 or die_error(500, "Open git-diff-tree failed");
5129         @difftree = map { chomp; $_ } <$fd>;
5130         close $fd or die_error(404, "Reading git-diff-tree failed");
5131
5132         # non-textual hash id's can be cached
5133         my $expires;
5134         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5135                 $expires = "+1d";
5136         }
5137         my $refs = git_get_references();
5138         my $ref = format_ref_marker($refs, $co{'id'});
5139
5140         git_header_html(undef, $expires);
5141         git_print_page_nav('commit', '',
5142                            $hash, $co{'tree'}, $hash,
5143                            $formats_nav);
5144
5145         if (defined $co{'parent'}) {
5146                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5147         } else {
5148                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5149         }
5150         print "<div class=\"title_text\">\n" .
5151               "<table class=\"object_header\">\n";
5152         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5153               "<tr>" .
5154               "<td></td><td> $ad{'rfc2822'}";
5155         if ($ad{'hour_local'} < 6) {
5156                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5157                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5158         } else {
5159                 printf(" (%02d:%02d %s)",
5160                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5161         }
5162         print "</td>" .
5163               "</tr>\n";
5164         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5165         print "<tr><td></td><td> $cd{'rfc2822'}" .
5166               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5167               "</td></tr>\n";
5168         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5169         print "<tr>" .
5170               "<td>tree</td>" .
5171               "<td class=\"sha1\">" .
5172               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5173                        class => "list"}, $co{'tree'}) .
5174               "</td>" .
5175               "<td class=\"link\">" .
5176               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5177                       "tree");
5178         my $snapshot_links = format_snapshot_links($hash);
5179         if (defined $snapshot_links) {
5180                 print " | " . $snapshot_links;
5181         }
5182         print "</td>" .
5183               "</tr>\n";
5184
5185         foreach my $par (@$parents) {
5186                 print "<tr>" .
5187                       "<td>parent</td>" .
5188                       "<td class=\"sha1\">" .
5189                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5190                                class => "list"}, $par) .
5191                       "</td>" .
5192                       "<td class=\"link\">" .
5193                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5194                       " | " .
5195                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5196                       "</td>" .
5197                       "</tr>\n";
5198         }
5199         print "</table>".
5200               "</div>\n";
5201
5202         print "<div class=\"page_body\">\n";
5203         git_print_log($co{'comment'});
5204         print "</div>\n";
5205
5206         git_difftree_body(\@difftree, $hash, @$parents);
5207
5208         git_footer_html();
5209 }
5210
5211 sub git_object {
5212         # object is defined by:
5213         # - hash or hash_base alone
5214         # - hash_base and file_name
5215         my $type;
5216
5217         # - hash or hash_base alone
5218         if ($hash || ($hash_base && !defined $file_name)) {
5219                 my $object_id = $hash || $hash_base;
5220
5221                 open my $fd, "-|", quote_command(
5222                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5223                         or die_error(404, "Object does not exist");
5224                 $type = <$fd>;
5225                 chomp $type;
5226                 close $fd
5227                         or die_error(404, "Object does not exist");
5228
5229         # - hash_base and file_name
5230         } elsif ($hash_base && defined $file_name) {
5231                 $file_name =~ s,/+$,,;
5232
5233                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5234                         or die_error(404, "Base object does not exist");
5235
5236                 # here errors should not hapen
5237                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5238                         or die_error(500, "Open git-ls-tree failed");
5239                 my $line = <$fd>;
5240                 close $fd;
5241
5242                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5243                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5244                         die_error(404, "File or directory for given base does not exist");
5245                 }
5246                 $type = $2;
5247                 $hash = $3;
5248         } else {
5249                 die_error(400, "Not enough information to find object");
5250         }
5251
5252         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5253                                           hash=>$hash, hash_base=>$hash_base,
5254                                           file_name=>$file_name),
5255                              -status => '302 Found');
5256 }
5257
5258 sub git_blobdiff {
5259         my $format = shift || 'html';
5260
5261         my $fd;
5262         my @difftree;
5263         my %diffinfo;
5264         my $expires;
5265
5266         # preparing $fd and %diffinfo for git_patchset_body
5267         # new style URI
5268         if (defined $hash_base && defined $hash_parent_base) {
5269                 if (defined $file_name) {
5270                         # read raw output
5271                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5272                                 $hash_parent_base, $hash_base,
5273                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5274                                 or die_error(500, "Open git-diff-tree failed");
5275                         @difftree = map { chomp; $_ } <$fd>;
5276                         close $fd
5277                                 or die_error(404, "Reading git-diff-tree failed");
5278                         @difftree
5279                                 or die_error(404, "Blob diff not found");
5280
5281                 } elsif (defined $hash &&
5282                          $hash =~ /[0-9a-fA-F]{40}/) {
5283                         # try to find filename from $hash
5284
5285                         # read filtered raw output
5286                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5287                                 $hash_parent_base, $hash_base, "--"
5288                                 or die_error(500, "Open git-diff-tree failed");
5289                         @difftree =
5290                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5291                                 # $hash == to_id
5292                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5293                                 map { chomp; $_ } <$fd>;
5294                         close $fd
5295                                 or die_error(404, "Reading git-diff-tree failed");
5296                         @difftree
5297                                 or die_error(404, "Blob diff not found");
5298
5299                 } else {
5300                         die_error(400, "Missing one of the blob diff parameters");
5301                 }
5302
5303                 if (@difftree > 1) {
5304                         die_error(400, "Ambiguous blob diff specification");
5305                 }
5306
5307                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5308                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5309                 $file_name   ||= $diffinfo{'to_file'};
5310
5311                 $hash_parent ||= $diffinfo{'from_id'};
5312                 $hash        ||= $diffinfo{'to_id'};
5313
5314                 # non-textual hash id's can be cached
5315                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5316                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5317                         $expires = '+1d';
5318                 }
5319
5320                 # open patch output
5321                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5322                         '-p', ($format eq 'html' ? "--full-index" : ()),
5323                         $hash_parent_base, $hash_base,
5324                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5325                         or die_error(500, "Open git-diff-tree failed");
5326         }
5327
5328         # old/legacy style URI -- not generated anymore since 1.4.3.
5329         if (!%diffinfo) {
5330                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5331         }
5332
5333         # header
5334         if ($format eq 'html') {
5335                 my $formats_nav =
5336                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5337                                 "raw");
5338                 git_header_html(undef, $expires);
5339                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5340                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5341                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5342                 } else {
5343                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5344                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5345                 }
5346                 if (defined $file_name) {
5347                         git_print_page_path($file_name, "blob", $hash_base);
5348                 } else {
5349                         print "<div class=\"page_path\"></div>\n";
5350                 }
5351
5352         } elsif ($format eq 'plain') {
5353                 print $cgi->header(
5354                         -type => 'text/plain',
5355                         -charset => 'utf-8',
5356                         -expires => $expires,
5357                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5358
5359                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5360
5361         } else {
5362                 die_error(400, "Unknown blobdiff format");
5363         }
5364
5365         # patch
5366         if ($format eq 'html') {
5367                 print "<div class=\"page_body\">\n";
5368
5369                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5370                 close $fd;
5371
5372                 print "</div>\n"; # class="page_body"
5373                 git_footer_html();
5374
5375         } else {
5376                 while (my $line = <$fd>) {
5377                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5378                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5379
5380                         print $line;
5381
5382                         last if $line =~ m!^\+\+\+!;
5383                 }
5384                 local $/ = undef;
5385                 print <$fd>;
5386                 close $fd;
5387         }
5388 }
5389
5390 sub git_blobdiff_plain {
5391         git_blobdiff('plain');
5392 }
5393
5394 sub git_commitdiff {
5395         my %params = @_;
5396         my $format = $params{-format} || 'html';
5397
5398         my ($patch_max) = gitweb_get_feature('patches');
5399         if ($format eq 'patch') {
5400                 die_error(403, "Patch view not allowed") unless $patch_max;
5401         }
5402
5403         $hash ||= $hash_base || "HEAD";
5404         my %co = parse_commit($hash)
5405             or die_error(404, "Unknown commit object");
5406
5407         # choose format for commitdiff for merge
5408         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5409                 $hash_parent = '--cc';
5410         }
5411         # we need to prepare $formats_nav before almost any parameter munging
5412         my $formats_nav;
5413         if ($format eq 'html') {
5414                 $formats_nav =
5415                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5416                                 "raw");
5417                 if ($patch_max) {
5418                         $formats_nav .= " | " .
5419                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5420                                         "patch");
5421                 }
5422
5423                 if (defined $hash_parent &&
5424                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5425                         # commitdiff with two commits given
5426                         my $hash_parent_short = $hash_parent;
5427                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5428                                 $hash_parent_short = substr($hash_parent, 0, 7);
5429                         }
5430                         $formats_nav .=
5431                                 ' (from';
5432                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5433                                 if ($co{'parents'}[$i] eq $hash_parent) {
5434                                         $formats_nav .= ' parent ' . ($i+1);
5435                                         last;
5436                                 }
5437                         }
5438                         $formats_nav .= ': ' .
5439                                 $cgi->a({-href => href(action=>"commitdiff",
5440                                                        hash=>$hash_parent)},
5441                                         esc_html($hash_parent_short)) .
5442                                 ')';
5443                 } elsif (!$co{'parent'}) {
5444                         # --root commitdiff
5445                         $formats_nav .= ' (initial)';
5446                 } elsif (scalar @{$co{'parents'}} == 1) {
5447                         # single parent commit
5448                         $formats_nav .=
5449                                 ' (parent: ' .
5450                                 $cgi->a({-href => href(action=>"commitdiff",
5451                                                        hash=>$co{'parent'})},
5452                                         esc_html(substr($co{'parent'}, 0, 7))) .
5453                                 ')';
5454                 } else {
5455                         # merge commit
5456                         if ($hash_parent eq '--cc') {
5457                                 $formats_nav .= ' | ' .
5458                                         $cgi->a({-href => href(action=>"commitdiff",
5459                                                                hash=>$hash, hash_parent=>'-c')},
5460                                                 'combined');
5461                         } else { # $hash_parent eq '-c'
5462                                 $formats_nav .= ' | ' .
5463                                         $cgi->a({-href => href(action=>"commitdiff",
5464                                                                hash=>$hash, hash_parent=>'--cc')},
5465                                                 'compact');
5466                         }
5467                         $formats_nav .=
5468                                 ' (merge: ' .
5469                                 join(' ', map {
5470                                         $cgi->a({-href => href(action=>"commitdiff",
5471                                                                hash=>$_)},
5472                                                 esc_html(substr($_, 0, 7)));
5473                                 } @{$co{'parents'}} ) .
5474                                 ')';
5475                 }
5476         }
5477
5478         my $hash_parent_param = $hash_parent;
5479         if (!defined $hash_parent_param) {
5480                 # --cc for multiple parents, --root for parentless
5481                 $hash_parent_param =
5482                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5483         }
5484
5485         # read commitdiff
5486         my $fd;
5487         my @difftree;
5488         if ($format eq 'html') {
5489                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5490                         "--no-commit-id", "--patch-with-raw", "--full-index",
5491                         $hash_parent_param, $hash, "--"
5492                         or die_error(500, "Open git-diff-tree failed");
5493
5494                 while (my $line = <$fd>) {
5495                         chomp $line;
5496                         # empty line ends raw part of diff-tree output
5497                         last unless $line;
5498                         push @difftree, scalar parse_difftree_raw_line($line);
5499                 }
5500
5501         } elsif ($format eq 'plain') {
5502                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5503                         '-p', $hash_parent_param, $hash, "--"
5504                         or die_error(500, "Open git-diff-tree failed");
5505         } elsif ($format eq 'patch') {
5506                 # For commit ranges, we limit the output to the number of
5507                 # patches specified in the 'patches' feature.
5508                 # For single commits, we limit the output to a single patch,
5509                 # diverging from the git-format-patch default.
5510                 my @commit_spec = ();
5511                 if ($hash_parent) {
5512                         if ($patch_max > 0) {
5513                                 push @commit_spec, "-$patch_max";
5514                         }
5515                         push @commit_spec, '-n', "$hash_parent..$hash";
5516                 } else {
5517                         if ($params{-single}) {
5518                                 push @commit_spec, '-1';
5519                         } else {
5520                                 if ($patch_max > 0) {
5521                                         push @commit_spec, "-$patch_max";
5522                                 }
5523                                 push @commit_spec, "-n";
5524                         }
5525                         push @commit_spec, '--root', $hash;
5526                 }
5527                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5528                         '--stdout', @commit_spec
5529                         or die_error(500, "Open git-format-patch failed");
5530         } else {
5531                 die_error(400, "Unknown commitdiff format");
5532         }
5533
5534         # non-textual hash id's can be cached
5535         my $expires;
5536         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5537                 $expires = "+1d";
5538         }
5539
5540         # write commit message
5541         if ($format eq 'html') {
5542                 my $refs = git_get_references();
5543                 my $ref = format_ref_marker($refs, $co{'id'});
5544
5545                 git_header_html(undef, $expires);
5546                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5547                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5548                 git_print_authorship(\%co);
5549                 print "<div class=\"page_body\">\n";
5550                 if (@{$co{'comment'}} > 1) {
5551                         print "<div class=\"log\">\n";
5552                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5553                         print "</div>\n"; # class="log"
5554                 }
5555
5556         } elsif ($format eq 'plain') {
5557                 my $refs = git_get_references("tags");
5558                 my $tagname = git_get_rev_name_tags($hash);
5559                 my $filename = basename($project) . "-$hash.patch";
5560
5561                 print $cgi->header(
5562                         -type => 'text/plain',
5563                         -charset => 'utf-8',
5564                         -expires => $expires,
5565                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5566                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5567                 print "From: " . to_utf8($co{'author'}) . "\n";
5568                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5569                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5570
5571                 print "X-Git-Tag: $tagname\n" if $tagname;
5572                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5573
5574                 foreach my $line (@{$co{'comment'}}) {
5575                         print to_utf8($line) . "\n";
5576                 }
5577                 print "---\n\n";
5578         } elsif ($format eq 'patch') {
5579                 my $filename = basename($project) . "-$hash.patch";
5580
5581                 print $cgi->header(
5582                         -type => 'text/plain',
5583                         -charset => 'utf-8',
5584                         -expires => $expires,
5585                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5586         }
5587
5588         # write patch
5589         if ($format eq 'html') {
5590                 my $use_parents = !defined $hash_parent ||
5591                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5592                 git_difftree_body(\@difftree, $hash,
5593                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5594                 print "<br/>\n";
5595
5596                 git_patchset_body($fd, \@difftree, $hash,
5597                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5598                 close $fd;
5599                 print "</div>\n"; # class="page_body"
5600                 git_footer_html();
5601
5602         } elsif ($format eq 'plain') {
5603                 local $/ = undef;
5604                 print <$fd>;
5605                 close $fd
5606                         or print "Reading git-diff-tree failed\n";
5607         } elsif ($format eq 'patch') {
5608                 local $/ = undef;
5609                 print <$fd>;
5610                 close $fd
5611                         or print "Reading git-format-patch failed\n";
5612         }
5613 }
5614
5615 sub git_commitdiff_plain {
5616         git_commitdiff(-format => 'plain');
5617 }
5618
5619 # format-patch-style patches
5620 sub git_patch {
5621         git_commitdiff(-format => 'patch', -single=> 1);
5622 }
5623
5624 sub git_patches {
5625         git_commitdiff(-format => 'patch');
5626 }
5627
5628 sub git_history {
5629         if (!defined $hash_base) {
5630                 $hash_base = git_get_head_hash($project);
5631         }
5632         if (!defined $page) {
5633                 $page = 0;
5634         }
5635         my $ftype;
5636         my %co = parse_commit($hash_base)
5637             or die_error(404, "Unknown commit object");
5638
5639         my $refs = git_get_references();
5640         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5641
5642         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5643                                        $file_name, "--full-history")
5644             or die_error(404, "No such file or directory on given branch");
5645
5646         if (!defined $hash && defined $file_name) {
5647                 # some commits could have deleted file in question,
5648                 # and not have it in tree, but one of them has to have it
5649                 for (my $i = 0; $i <= @commitlist; $i++) {
5650                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5651                         last if defined $hash;
5652                 }
5653         }
5654         if (defined $hash) {
5655                 $ftype = git_get_type($hash);
5656         }
5657         if (!defined $ftype) {
5658                 die_error(500, "Unknown type of object");
5659         }
5660
5661         my $paging_nav = '';
5662         if ($page > 0) {
5663                 $paging_nav .=
5664                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5665                                                file_name=>$file_name)},
5666                                 "first");
5667                 $paging_nav .= " &sdot; " .
5668                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5669                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5670         } else {
5671                 $paging_nav .= "first";
5672                 $paging_nav .= " &sdot; prev";
5673         }
5674         my $next_link = '';
5675         if ($#commitlist >= 100) {
5676                 $next_link =
5677                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5678                                  -accesskey => "n", -title => "Alt-n"}, "next");
5679                 $paging_nav .= " &sdot; $next_link";
5680         } else {
5681                 $paging_nav .= " &sdot; next";
5682         }
5683
5684         git_header_html();
5685         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5686         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5687         git_print_page_path($file_name, $ftype, $hash_base);
5688
5689         git_history_body(\@commitlist, 0, 99,
5690                          $refs, $hash_base, $ftype, $next_link);
5691
5692         git_footer_html();
5693 }
5694
5695 sub git_search {
5696         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5697         if (!defined $searchtext) {
5698                 die_error(400, "Text field is empty");
5699         }
5700         if (!defined $hash) {
5701                 $hash = git_get_head_hash($project);
5702         }
5703         my %co = parse_commit($hash);
5704         if (!%co) {
5705                 die_error(404, "Unknown commit object");
5706         }
5707         if (!defined $page) {
5708                 $page = 0;
5709         }
5710
5711         $searchtype ||= 'commit';
5712         if ($searchtype eq 'pickaxe') {
5713                 # pickaxe may take all resources of your box and run for several minutes
5714                 # with every query - so decide by yourself how public you make this feature
5715                 gitweb_check_feature('pickaxe')
5716                     or die_error(403, "Pickaxe is disabled");
5717         }
5718         if ($searchtype eq 'grep') {
5719                 gitweb_check_feature('grep')
5720                     or die_error(403, "Grep is disabled");
5721         }
5722
5723         git_header_html();
5724
5725         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5726                 my $greptype;
5727                 if ($searchtype eq 'commit') {
5728                         $greptype = "--grep=";
5729                 } elsif ($searchtype eq 'author') {
5730                         $greptype = "--author=";
5731                 } elsif ($searchtype eq 'committer') {
5732                         $greptype = "--committer=";
5733                 }
5734                 $greptype .= $searchtext;
5735                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5736                                                $greptype, '--regexp-ignore-case',
5737                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5738
5739                 my $paging_nav = '';
5740                 if ($page > 0) {
5741                         $paging_nav .=
5742                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5743                                                        searchtext=>$searchtext,
5744                                                        searchtype=>$searchtype)},
5745                                         "first");
5746                         $paging_nav .= " &sdot; " .
5747                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5748                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5749                 } else {
5750                         $paging_nav .= "first";
5751                         $paging_nav .= " &sdot; prev";
5752                 }
5753                 my $next_link = '';
5754                 if ($#commitlist >= 100) {
5755                         $next_link =
5756                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5757                                          -accesskey => "n", -title => "Alt-n"}, "next");
5758                         $paging_nav .= " &sdot; $next_link";
5759                 } else {
5760                         $paging_nav .= " &sdot; next";
5761                 }
5762
5763                 if ($#commitlist >= 100) {
5764                 }
5765
5766                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5767                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5768                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5769         }
5770
5771         if ($searchtype eq 'pickaxe') {
5772                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5773                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5774
5775                 print "<table class=\"pickaxe search\">\n";
5776                 my $alternate = 1;
5777                 $/ = "\n";
5778                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5779                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5780                         ($search_use_regexp ? '--pickaxe-regex' : ());
5781                 undef %co;
5782                 my @files;
5783                 while (my $line = <$fd>) {
5784                         chomp $line;
5785                         next unless $line;
5786
5787                         my %set = parse_difftree_raw_line($line);
5788                         if (defined $set{'commit'}) {
5789                                 # finish previous commit
5790                                 if (%co) {
5791                                         print "</td>\n" .
5792                                               "<td class=\"link\">" .
5793                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5794                                               " | " .
5795                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5796                                         print "</td>\n" .
5797                                               "</tr>\n";
5798                                 }
5799
5800                                 if ($alternate) {
5801                                         print "<tr class=\"dark\">\n";
5802                                 } else {
5803                                         print "<tr class=\"light\">\n";
5804                                 }
5805                                 $alternate ^= 1;
5806                                 %co = parse_commit($set{'commit'});
5807                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5808                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5809                                       "<td><i>$author</i></td>\n" .
5810                                       "<td>" .
5811                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5812                                               -class => "list subject"},
5813                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5814                         } elsif (defined $set{'to_id'}) {
5815                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5816
5817                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5818                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5819                                               -class => "list"},
5820                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5821                                       "<br/>\n";
5822                         }
5823                 }
5824                 close $fd;
5825
5826                 # finish last commit (warning: repetition!)
5827                 if (%co) {
5828                         print "</td>\n" .
5829                               "<td class=\"link\">" .
5830                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5831                               " | " .
5832                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5833                         print "</td>\n" .
5834                               "</tr>\n";
5835                 }
5836
5837                 print "</table>\n";
5838         }
5839
5840         if ($searchtype eq 'grep') {
5841                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5842                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5843
5844                 print "<table class=\"grep_search\">\n";
5845                 my $alternate = 1;
5846                 my $matches = 0;
5847                 $/ = "\n";
5848                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5849                         $search_use_regexp ? ('-E', '-i') : '-F',
5850                         $searchtext, $co{'tree'};
5851                 my $lastfile = '';
5852                 while (my $line = <$fd>) {
5853                         chomp $line;
5854                         my ($file, $lno, $ltext, $binary);
5855                         last if ($matches++ > 1000);
5856                         if ($line =~ /^Binary file (.+) matches$/) {
5857                                 $file = $1;
5858                                 $binary = 1;
5859                         } else {
5860                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5861                         }
5862                         if ($file ne $lastfile) {
5863                                 $lastfile and print "</td></tr>\n";
5864                                 if ($alternate++) {
5865                                         print "<tr class=\"dark\">\n";
5866                                 } else {
5867                                         print "<tr class=\"light\">\n";
5868                                 }
5869                                 print "<td class=\"list\">".
5870                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5871                                                                file_name=>"$file"),
5872                                                 -class => "list"}, esc_path($file));
5873                                 print "</td><td>\n";
5874                                 $lastfile = $file;
5875                         }
5876                         if ($binary) {
5877                                 print "<div class=\"binary\">Binary file</div>\n";
5878                         } else {
5879                                 $ltext = untabify($ltext);
5880                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5881                                         $ltext = esc_html($1, -nbsp=>1);
5882                                         $ltext .= '<span class="match">';
5883                                         $ltext .= esc_html($2, -nbsp=>1);
5884                                         $ltext .= '</span>';
5885                                         $ltext .= esc_html($3, -nbsp=>1);
5886                                 } else {
5887                                         $ltext = esc_html($ltext, -nbsp=>1);
5888                                 }
5889                                 print "<div class=\"pre\">" .
5890                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5891                                                                file_name=>"$file").'#l'.$lno,
5892                                                 -class => "linenr"}, sprintf('%4i', $lno))
5893                                         . ' ' .  $ltext . "</div>\n";
5894                         }
5895                 }
5896                 if ($lastfile) {
5897                         print "</td></tr>\n";
5898                         if ($matches > 1000) {
5899                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5900                         }
5901                 } else {
5902                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5903                 }
5904                 close $fd;
5905
5906                 print "</table>\n";
5907         }
5908         git_footer_html();
5909 }
5910
5911 sub git_search_help {
5912         git_header_html();
5913         git_print_page_nav('','', $hash,$hash,$hash);
5914         print <<EOT;
5915 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5916 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5917 the pattern entered is recognized as the POSIX extended
5918 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5919 insensitive).</p>
5920 <dl>
5921 <dt><b>commit</b></dt>
5922 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5923 EOT
5924         my $have_grep = gitweb_check_feature('grep');
5925         if ($have_grep) {
5926                 print <<EOT;
5927 <dt><b>grep</b></dt>
5928 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5929     a different one) are searched for the given pattern. On large trees, this search can take
5930 a while and put some strain on the server, so please use it with some consideration. Note that
5931 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5932 case-sensitive.</dd>
5933 EOT
5934         }
5935         print <<EOT;
5936 <dt><b>author</b></dt>
5937 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5938 <dt><b>committer</b></dt>
5939 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5940 EOT
5941         my $have_pickaxe = gitweb_check_feature('pickaxe');
5942         if ($have_pickaxe) {
5943                 print <<EOT;
5944 <dt><b>pickaxe</b></dt>
5945 <dd>All commits that caused the string to appear or disappear from any file (changes that
5946 added, removed or "modified" the string) will be listed. This search can take a while and
5947 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5948 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5949 EOT
5950         }
5951         print "</dl>\n";
5952         git_footer_html();
5953 }
5954
5955 sub git_shortlog {
5956         my $head = git_get_head_hash($project);
5957         if (!defined $hash) {
5958                 $hash = $head;
5959         }
5960         if (!defined $page) {
5961                 $page = 0;
5962         }
5963         my $refs = git_get_references();
5964
5965         my $commit_hash = $hash;
5966         if (defined $hash_parent) {
5967                 $commit_hash = "$hash_parent..$hash";
5968         }
5969         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5970
5971         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5972         my $next_link = '';
5973         if ($#commitlist >= 100) {
5974                 $next_link =
5975                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5976                                  -accesskey => "n", -title => "Alt-n"}, "next");
5977         }
5978         my $patch_max = gitweb_check_feature('patches');
5979         if ($patch_max) {
5980                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5981                         $paging_nav .= " &sdot; " .
5982                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5983                                         "patches");
5984                 }
5985         }
5986
5987         git_header_html();
5988         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5989         git_print_header_div('summary', $project);
5990
5991         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5992
5993         git_footer_html();
5994 }
5995
5996 ## ......................................................................
5997 ## feeds (RSS, Atom; OPML)
5998
5999 sub git_feed {
6000         my $format = shift || 'atom';
6001         my $have_blame = gitweb_check_feature('blame');
6002
6003         # Atom: http://www.atomenabled.org/developers/syndication/
6004         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6005         if ($format ne 'rss' && $format ne 'atom') {
6006                 die_error(400, "Unknown web feed format");
6007         }
6008
6009         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6010         my $head = $hash || 'HEAD';
6011         my @commitlist = parse_commits($head, 150, 0, $file_name);
6012
6013         my %latest_commit;
6014         my %latest_date;
6015         my $content_type = "application/$format+xml";
6016         if (defined $cgi->http('HTTP_ACCEPT') &&
6017                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6018                 # browser (feed reader) prefers text/xml
6019                 $content_type = 'text/xml';
6020         }
6021         if (defined($commitlist[0])) {
6022                 %latest_commit = %{$commitlist[0]};
6023                 my $latest_epoch = $latest_commit{'committer_epoch'};
6024                 %latest_date   = parse_date($latest_epoch);
6025                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6026                 if (defined $if_modified) {
6027                         my $since;
6028                         if (eval { require HTTP::Date; 1; }) {
6029                                 $since = HTTP::Date::str2time($if_modified);
6030                         } elsif (eval { require Time::ParseDate; 1; }) {
6031                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6032                         }
6033                         if (defined $since && $latest_epoch <= $since) {
6034                                 print $cgi->header(
6035                                         -type => $content_type,
6036                                         -charset => 'utf-8',
6037                                         -last_modified => $latest_date{'rfc2822'},
6038                                         -status => '304 Not Modified');
6039                                 return;
6040                         }
6041                 }
6042                 print $cgi->header(
6043                         -type => $content_type,
6044                         -charset => 'utf-8',
6045                         -last_modified => $latest_date{'rfc2822'});
6046         } else {
6047                 print $cgi->header(
6048                         -type => $content_type,
6049                         -charset => 'utf-8');
6050         }
6051
6052         # Optimization: skip generating the body if client asks only
6053         # for Last-Modified date.
6054         return if ($cgi->request_method() eq 'HEAD');
6055
6056         # header variables
6057         my $title = "$site_name - $project/$action";
6058         my $feed_type = 'log';
6059         if (defined $hash) {
6060                 $title .= " - '$hash'";
6061                 $feed_type = 'branch log';
6062                 if (defined $file_name) {
6063                         $title .= " :: $file_name";
6064                         $feed_type = 'history';
6065                 }
6066         } elsif (defined $file_name) {
6067                 $title .= " - $file_name";
6068                 $feed_type = 'history';
6069         }
6070         $title .= " $feed_type";
6071         my $descr = git_get_project_description($project);
6072         if (defined $descr) {
6073                 $descr = esc_html($descr);
6074         } else {
6075                 $descr = "$project " .
6076                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6077                          " feed";
6078         }
6079         my $owner = git_get_project_owner($project);
6080         $owner = esc_html($owner);
6081
6082         #header
6083         my $alt_url;
6084         if (defined $file_name) {
6085                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6086         } elsif (defined $hash) {
6087                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6088         } else {
6089                 $alt_url = href(-full=>1, action=>"summary");
6090         }
6091         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6092         if ($format eq 'rss') {
6093                 print <<XML;
6094 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6095 <channel>
6096 XML
6097                 print "<title>$title</title>\n" .
6098                       "<link>$alt_url</link>\n" .
6099                       "<description>$descr</description>\n" .
6100                       "<language>en</language>\n" .
6101                       # project owner is responsible for 'editorial' content
6102                       "<managingEditor>$owner</managingEditor>\n";
6103                 if (defined $logo || defined $favicon) {
6104                         # prefer the logo to the favicon, since RSS
6105                         # doesn't allow both
6106                         my $img = esc_url($logo || $favicon);
6107                         print "<image>\n" .
6108                               "<url>$img</url>\n" .
6109                               "<title>$title</title>\n" .
6110                               "<link>$alt_url</link>\n" .
6111                               "</image>\n";
6112                 }
6113                 if (%latest_date) {
6114                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6115                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6116                 }
6117                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6118         } elsif ($format eq 'atom') {
6119                 print <<XML;
6120 <feed xmlns="http://www.w3.org/2005/Atom">
6121 XML
6122                 print "<title>$title</title>\n" .
6123                       "<subtitle>$descr</subtitle>\n" .
6124                       '<link rel="alternate" type="text/html" href="' .
6125                       $alt_url . '" />' . "\n" .
6126                       '<link rel="self" type="' . $content_type . '" href="' .
6127                       $cgi->self_url() . '" />' . "\n" .
6128                       "<id>" . href(-full=>1) . "</id>\n" .
6129                       # use project owner for feed author
6130                       "<author><name>$owner</name></author>\n";
6131                 if (defined $favicon) {
6132                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6133                 }
6134                 if (defined $logo_url) {
6135                         # not twice as wide as tall: 72 x 27 pixels
6136                         print "<logo>" . esc_url($logo) . "</logo>\n";
6137                 }
6138                 if (! %latest_date) {
6139                         # dummy date to keep the feed valid until commits trickle in:
6140                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6141                 } else {
6142                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6143                 }
6144                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6145         }
6146
6147         # contents
6148         for (my $i = 0; $i <= $#commitlist; $i++) {
6149                 my %co = %{$commitlist[$i]};
6150                 my $commit = $co{'id'};
6151                 # we read 150, we always show 30 and the ones more recent than 48 hours
6152                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6153                         last;
6154                 }
6155                 my %cd = parse_date($co{'author_epoch'});
6156
6157                 # get list of changed files
6158                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6159                         $co{'parent'} || "--root",
6160                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6161                         or next;
6162                 my @difftree = map { chomp; $_ } <$fd>;
6163                 close $fd
6164                         or next;
6165
6166                 # print element (entry, item)
6167                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6168                 if ($format eq 'rss') {
6169                         print "<item>\n" .
6170                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6171                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6172                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6173                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6174                               "<link>$co_url</link>\n" .
6175                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6176                               "<content:encoded>" .
6177                               "<![CDATA[\n";
6178                 } elsif ($format eq 'atom') {
6179                         print "<entry>\n" .
6180                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6181                               "<updated>$cd{'iso-8601'}</updated>\n" .
6182                               "<author>\n" .
6183                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6184                         if ($co{'author_email'}) {
6185                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6186                         }
6187                         print "</author>\n" .
6188                               # use committer for contributor
6189                               "<contributor>\n" .
6190                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6191                         if ($co{'committer_email'}) {
6192                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6193                         }
6194                         print "</contributor>\n" .
6195                               "<published>$cd{'iso-8601'}</published>\n" .
6196                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6197                               "<id>$co_url</id>\n" .
6198                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6199                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6200                 }
6201                 my $comment = $co{'comment'};
6202                 print "<pre>\n";
6203                 foreach my $line (@$comment) {
6204                         $line = esc_html($line);
6205                         print "$line\n";
6206                 }
6207                 print "</pre><ul>\n";
6208                 foreach my $difftree_line (@difftree) {
6209                         my %difftree = parse_difftree_raw_line($difftree_line);
6210                         next if !$difftree{'from_id'};
6211
6212                         my $file = $difftree{'file'} || $difftree{'to_file'};
6213
6214                         print "<li>" .
6215                               "[" .
6216                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6217                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6218                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6219                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6220                                       -title => "diff"}, 'D');
6221                         if ($have_blame) {
6222                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6223                                                              file_name=>$file, hash_base=>$commit),
6224                                               -title => "blame"}, 'B');
6225                         }
6226                         # if this is not a feed of a file history
6227                         if (!defined $file_name || $file_name ne $file) {
6228                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6229                                                              file_name=>$file, hash=>$commit),
6230                                               -title => "history"}, 'H');
6231                         }
6232                         $file = esc_path($file);
6233                         print "] ".
6234                               "$file</li>\n";
6235                 }
6236                 if ($format eq 'rss') {
6237                         print "</ul>]]>\n" .
6238                               "</content:encoded>\n" .
6239                               "</item>\n";
6240                 } elsif ($format eq 'atom') {
6241                         print "</ul>\n</div>\n" .
6242                               "</content>\n" .
6243                               "</entry>\n";
6244                 }
6245         }
6246
6247         # end of feed
6248         if ($format eq 'rss') {
6249                 print "</channel>\n</rss>\n";
6250         }       elsif ($format eq 'atom') {
6251                 print "</feed>\n";
6252         }
6253 }
6254
6255 sub git_rss {
6256         git_feed('rss');
6257 }
6258
6259 sub git_atom {
6260         git_feed('atom');
6261 }
6262
6263 sub git_opml {
6264         my @list = git_get_projects_list();
6265
6266         print $cgi->header(
6267                 -type => 'text/xml',
6268                 -charset => 'utf-8',
6269                 -content_disposition => 'inline; filename="opml.xml"');
6270
6271         print <<XML;
6272 <?xml version="1.0" encoding="utf-8"?>
6273 <opml version="1.0">
6274 <head>
6275   <title>$site_name OPML Export</title>
6276 </head>
6277 <body>
6278 <outline text="git RSS feeds">
6279 XML
6280
6281         foreach my $pr (@list) {
6282                 my %proj = %$pr;
6283                 my $head = git_get_head_hash($proj{'path'});
6284                 if (!defined $head) {
6285                         next;
6286                 }
6287                 $git_dir = "$projectroot/$proj{'path'}";
6288                 my %co = parse_commit($head);
6289                 if (!%co) {
6290                         next;
6291                 }
6292
6293                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6294                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6295                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6296                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6297         }
6298         print <<XML;
6299 </outline>
6300 </body>
6301 </opml>
6302 XML
6303 }