Lady’s Gitweb - Gitweb/blob - 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 = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89
  90 # URI of GIT logo (72x27 size)
  91 our $logo = "++GITWEB_LOGO++";
  92 # URI of GIT favicon, assumed to be image/png type
  93 our $favicon = "++GITWEB_FAVICON++";
  94
  95 # URI and label (title) of GIT logo link
  96 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  97 #our $logo_label = "git documentation";
  98 our $logo_url = "http://git.or.cz/";
  99 our $logo_label = "git homepage";
 100
 101 # source of projects list
 102 our $projects_list = "++GITWEB_LIST++";
 103
 104 # the width (in characters) of the projects list "Description" column
 105 our $projects_list_description_width = 25;
 106
 107 # default order of projects list
 108 # valid values are none, project, descr, owner, and age
 109 our $default_projects_order = "project";
 110
 111 # show repository only if this file exists
 112 # (only effective if this variable evaluates to true)
 113 our $export_ok = "++GITWEB_EXPORT_OK++";
 114
 115 # show repository only if this subroutine returns true
 116 # when given the path to the project, for example:
 117 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 118 our $export_auth_hook = undef;
 119
 120 # only allow viewing of repositories also shown on the overview page
 121 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 122
 123 # list of git base URLs used for URL to where fetch project from,
 124 # i.e. full URL is "$git_base_url/$project"
 125 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 126
 127 # default blob_plain mimetype and default charset for text/plain blob
 128 our $default_blob_plain_mimetype = 'text/plain';
 129 our $default_text_plain_charset  = undef;
 130
 131 # file to use for guessing MIME types before trying /etc/mime.types
 132 # (relative to the current git repository)
 133 our $mimetypes_file = undef;
 134
 135 # assume this charset if line contains non-UTF-8 characters;
 136 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 137 # for which encoding all byte sequences are valid, for example
 138 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 139 # could be even 'utf-8' for the old behavior)
 140 our $fallback_encoding = 'latin1';
 141
 142 # rename detection options for git-diff and git-diff-tree
 143 # - default is '-M', with the cost proportional to
 144 #   (number of removed files) * (number of new files).
 145 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 146 #   (number of changed files + number of removed files) * (number of new files)
 147 # - even more costly is '-C', '--find-copies-harder' with cost
 148 #   (number of files in the original tree) * (number of new files)
 149 # - one might want to include '-B' option, e.g. '-B', '-M'
 150 our @diff_opts = ('-M'); # taken from git_commit
 151
 152 # Disables features that would allow repository owners to inject script into
 153 # the gitweb domain.
 154 our $prevent_xss = 0;
 155
 156 # information about snapshot formats that gitweb is capable of serving
 157 our %known_snapshot_formats = (
 158         # name => {
 159         #       'display' => display name,
 160         #       'type' => mime type,
 161         #       'suffix' => filename suffix,
 162         #       'format' => --format for git-archive,
 163         #       'compressor' => [compressor command and arguments]
 164         #                       (array reference, optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'zip' => {
 181                 'display' => 'zip',
 182                 'type' => 'application/x-zip',
 183                 'suffix' => '.zip',
 184                 'format' => 'zip'},
 185 );
 186
 187 # Aliases so we understand old gitweb.snapshot values in repository
 188 # configuration.
 189 our %known_snapshot_format_aliases = (
 190         'gzip'  => 'tgz',
 191         'bzip2' => 'tbz2',
 192
 193         # backward compatibility: legacy gitweb config support
 194         'x-gzip' => undef, 'gz' => undef,
 195         'x-bzip2' => undef, 'bz2' => undef,
 196         'x-zip' => undef, '' => undef,
 197 );
 198
 199 # You define site-wide feature defaults here; override them with
 200 # $GITWEB_CONFIG as necessary.
 201 our %feature = (
 202         # feature => {
 203         #       'sub' => feature-sub (subroutine),
 204         #       'override' => allow-override (boolean),
 205         #       'default' => [ default options...] (array reference)}
 206         #
 207         # if feature is overridable (it means that allow-override has true value),
 208         # then feature-sub will be called with default options as parameters;
 209         # return value of feature-sub indicates if to enable specified feature
 210         #
 211         # if there is no 'sub' key (no feature-sub), then feature cannot be
 212         # overriden
 213         #
 214         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 215         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 216         # is enabled
 217
 218         # Enable the 'blame' blob view, showing the last commit that modified
 219         # each line in the file. This can be very CPU-intensive.
 220
 221         # To enable system wide have in $GITWEB_CONFIG
 222         # $feature{'blame'}{'default'} = [1];
 223         # To have project specific config enable override in $GITWEB_CONFIG
 224         # $feature{'blame'}{'override'} = 1;
 225         # and in project config gitweb.blame = 0|1;
 226         'blame' => {
 227                 'sub' => sub { feature_bool('blame', @_) },
 228                 'override' => 0,
 229                 'default' => [0]},
 230
 231         # Enable the 'snapshot' link, providing a compressed archive of any
 232         # tree. This can potentially generate high traffic if you have large
 233         # project.
 234
 235         # Value is a list of formats defined in %known_snapshot_formats that
 236         # you wish to offer.
 237         # To disable system wide have in $GITWEB_CONFIG
 238         # $feature{'snapshot'}{'default'} = [];
 239         # To have project specific config enable override in $GITWEB_CONFIG
 240         # $feature{'snapshot'}{'override'} = 1;
 241         # and in project config, a comma-separated list of formats or "none"
 242         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 243         'snapshot' => {
 244                 'sub' => \&feature_snapshot,
 245                 'override' => 0,
 246                 'default' => ['tgz']},
 247
 248         # Enable text search, which will list the commits which match author,
 249         # committer or commit text to a given string.  Enabled by default.
 250         # Project specific override is not supported.
 251         'search' => {
 252                 'override' => 0,
 253                 'default' => [1]},
 254
 255         # Enable grep search, which will list the files in currently selected
 256         # tree containing the given string. Enabled by default. This can be
 257         # potentially CPU-intensive, of course.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'grep'}{'default'} = [1];
 261         # To have project specific config enable override in $GITWEB_CONFIG
 262         # $feature{'grep'}{'override'} = 1;
 263         # and in project config gitweb.grep = 0|1;
 264         'grep' => {
 265                 'sub' => sub { feature_bool('grep', @_) },
 266                 'override' => 0,
 267                 'default' => [1]},
 268
 269         # Enable the pickaxe search, which will list the commits that modified
 270         # a given string in a file. This can be practical and quite faster
 271         # alternative to 'blame', but still potentially CPU-intensive.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'pickaxe'}{'default'} = [1];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'pickaxe'}{'override'} = 1;
 277         # and in project config gitweb.pickaxe = 0|1;
 278         'pickaxe' => {
 279                 'sub' => sub { feature_bool('pickaxe', @_) },
 280                 'override' => 0,
 281                 'default' => [1]},
 282
 283         # Make gitweb use an alternative format of the URLs which can be
 284         # more readable and natural-looking: project name is embedded
 285         # directly in the path and the query string contains other
 286         # auxiliary information. All gitweb installations recognize
 287         # URL in either format; this configures in which formats gitweb
 288         # generates links.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pathinfo'}{'default'} = [1];
 292         # Project specific override is not supported.
 293
 294         # Note that you will need to change the default location of CSS,
 295         # favicon, logo and possibly other files to an absolute URL. Also,
 296         # if gitweb.cgi serves as your indexfile, you will need to force
 297         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 298         'pathinfo' => {
 299                 'override' => 0,
 300                 'default' => [0]},
 301
 302         # Make gitweb consider projects in project root subdirectories
 303         # to be forks of existing projects. Given project $projname.git,
 304         # projects matching $projname/*.git will not be shown in the main
 305         # projects list, instead a '+' mark will be added to $projname
 306         # there and a 'forks' view will be enabled for the project, listing
 307         # all the forks. If project list is taken from a file, forks have
 308         # to be listed after the main project.
 309
 310         # To enable system wide have in $GITWEB_CONFIG
 311         # $feature{'forks'}{'default'} = [1];
 312         # Project specific override is not supported.
 313         'forks' => {
 314                 'override' => 0,
 315                 'default' => [0]},
 316
 317         # Insert custom links to the action bar of all project pages.
 318         # This enables you mainly to link to third-party scripts integrating
 319         # into gitweb; e.g. git-browser for graphical history representation
 320         # or custom web-based repository administration interface.
 321
 322         # The 'default' value consists of a list of triplets in the form
 323         # (label, link, position) where position is the label after which
 324         # to insert the link and link is a format string where %n expands
 325         # to the project name, %f to the project path within the filesystem,
 326         # %h to the current hash (h gitweb parameter) and %b to the current
 327         # hash base (hb gitweb parameter); %% expands to %.
 328
 329         # To enable system wide have in $GITWEB_CONFIG e.g.
 330         # $feature{'actions'}{'default'} = [('graphiclog',
 331         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 332         # Project specific override is not supported.
 333         'actions' => {
 334                 'override' => 0,
 335                 'default' => []},
 336
 337         # Allow gitweb scan project content tags described in ctags/
 338         # of project repository, and display the popular Web 2.0-ish
 339         # "tag cloud" near the project list. Note that this is something
 340         # COMPLETELY different from the normal Git tags.
 341
 342         # gitweb by itself can show existing tags, but it does not handle
 343         # tagging itself; you need an external application for that.
 344         # For an example script, check Girocco's cgi/tagproj.cgi.
 345         # You may want to install the HTML::TagCloud Perl module to get
 346         # a pretty tag cloud instead of just a list of tags.
 347
 348         # To enable system wide have in $GITWEB_CONFIG
 349         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 350         # Project specific override is not supported.
 351         'ctags' => {
 352                 'override' => 0,
 353                 'default' => [0]},
 354
 355         # The maximum number of patches in a patchset generated in patch
 356         # view. Set this to 0 or undef to disable patch view, or to a
 357         # negative number to remove any limit.
 358
 359         # To disable system wide have in $GITWEB_CONFIG
 360         # $feature{'patches'}{'default'} = [0];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'patches'}{'override'} = 1;
 363         # and in project config gitweb.patches = 0|n;
 364         # where n is the maximum number of patches allowed in a patchset.
 365         'patches' => {
 366                 'sub' => \&feature_patches,
 367                 'override' => 0,
 368                 'default' => [16]},
 369 );
 370
 371 sub gitweb_get_feature {
 372         my ($name) = @_;
 373         return unless exists $feature{$name};
 374         my ($sub, $override, @defaults) = (
 375                 $feature{$name}{'sub'},
 376                 $feature{$name}{'override'},
 377                 @{$feature{$name}{'default'}});
 378         if (!$override) { return @defaults; }
 379         if (!defined $sub) {
 380                 warn "feature $name is not overrideable";
 381                 return @defaults;
 382         }
 383         return $sub->(@defaults);
 384 }
 385
 386 # A wrapper to check if a given feature is enabled.
 387 # With this, you can say
 388 #
 389 #   my $bool_feat = gitweb_check_feature('bool_feat');
 390 #   gitweb_check_feature('bool_feat') or somecode;
 391 #
 392 # instead of
 393 #
 394 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 395 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 396 #
 397 sub gitweb_check_feature {
 398         return (gitweb_get_feature(@_))[0];
 399 }
 400
 401
 402 sub feature_bool {
 403         my $key = shift;
 404         my ($val) = git_get_project_config($key, '--bool');
 405
 406         if (!defined $val) {
 407                 return ($_[0]);
 408         } elsif ($val eq 'true') {
 409                 return (1);
 410         } elsif ($val eq 'false') {
 411                 return (0);
 412         }
 413 }
 414
 415 sub feature_snapshot {
 416         my (@fmts) = @_;
 417
 418         my ($val) = git_get_project_config('snapshot');
 419
 420         if ($val) {
 421                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 422         }
 423
 424         return @fmts;
 425 }
 426
 427 sub feature_patches {
 428         my @val = (git_get_project_config('patches', '--int'));
 429
 430         if (@val) {
 431                 return @val;
 432         }
 433
 434         return ($_[0]);
 435 }
 436
 437 # checking HEAD file with -e is fragile if the repository was
 438 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 439 # and then pruned.
 440 sub check_head_link {
 441         my ($dir) = @_;
 442         my $headfile = "$dir/HEAD";
 443         return ((-e $headfile) ||
 444                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 445 }
 446
 447 sub check_export_ok {
 448         my ($dir) = @_;
 449         return (check_head_link($dir) &&
 450                 (!$export_ok || -e "$dir/$export_ok") &&
 451                 (!$export_auth_hook || $export_auth_hook->($dir)));
 452 }
 453
 454 # process alternate names for backward compatibility
 455 # filter out unsupported (unknown) snapshot formats
 456 sub filter_snapshot_fmts {
 457         my @fmts = @_;
 458
 459         @fmts = map {
 460                 exists $known_snapshot_format_aliases{$_} ?
 461                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 462         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 463
 464 }
 465
 466 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 467 if (-e $GITWEB_CONFIG) {
 468         do $GITWEB_CONFIG;
 469 } else {
 470         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 471         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 472 }
 473
 474 # version of the core git binary
 475 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 476
 477 $projects_list ||= $projectroot;
 478
 479 # ======================================================================
 480 # input validation and dispatch
 481
 482 # input parameters can be collected from a variety of sources (presently, CGI
 483 # and PATH_INFO), so we define an %input_params hash that collects them all
 484 # together during validation: this allows subsequent uses (e.g. href()) to be
 485 # agnostic of the parameter origin
 486
 487 our %input_params = ();
 488
 489 # input parameters are stored with the long parameter name as key. This will
 490 # also be used in the href subroutine to convert parameters to their CGI
 491 # equivalent, and since the href() usage is the most frequent one, we store
 492 # the name -> CGI key mapping here, instead of the reverse.
 493 #
 494 # XXX: Warning: If you touch this, check the search form for updating,
 495 # too.
 496
 497 our @cgi_param_mapping = (
 498         project => "p",
 499         action => "a",
 500         file_name => "f",
 501         file_parent => "fp",
 502         hash => "h",
 503         hash_parent => "hp",
 504         hash_base => "hb",
 505         hash_parent_base => "hpb",
 506         page => "pg",
 507         order => "o",
 508         searchtext => "s",
 509         searchtype => "st",
 510         snapshot_format => "sf",
 511         extra_options => "opt",
 512         search_use_regexp => "sr",
 513 );
 514 our %cgi_param_mapping = @cgi_param_mapping;
 515
 516 # we will also need to know the possible actions, for validation
 517 our %actions = (
 518         "blame" => \&git_blame,
 519         "blobdiff" => \&git_blobdiff,
 520         "blobdiff_plain" => \&git_blobdiff_plain,
 521         "blob" => \&git_blob,
 522         "blob_plain" => \&git_blob_plain,
 523         "commitdiff" => \&git_commitdiff,
 524         "commitdiff_plain" => \&git_commitdiff_plain,
 525         "commit" => \&git_commit,
 526         "forks" => \&git_forks,
 527         "heads" => \&git_heads,
 528         "history" => \&git_history,
 529         "log" => \&git_log,
 530         "patch" => \&git_patch,
 531         "patches" => \&git_patches,
 532         "rss" => \&git_rss,
 533         "atom" => \&git_atom,
 534         "search" => \&git_search,
 535         "search_help" => \&git_search_help,
 536         "shortlog" => \&git_shortlog,
 537         "summary" => \&git_summary,
 538         "tag" => \&git_tag,
 539         "tags" => \&git_tags,
 540         "tree" => \&git_tree,
 541         "snapshot" => \&git_snapshot,
 542         "object" => \&git_object,
 543         # those below don't need $project
 544         "opml" => \&git_opml,
 545         "project_list" => \&git_project_list,
 546         "project_index" => \&git_project_index,
 547 );
 548
 549 # finally, we have the hash of allowed extra_options for the commands that
 550 # allow them
 551 our %allowed_options = (
 552         "--no-merges" => [ qw(rss atom log shortlog history) ],
 553 );
 554
 555 # fill %input_params with the CGI parameters. All values except for 'opt'
 556 # should be single values, but opt can be an array. We should probably
 557 # build an array of parameters that can be multi-valued, but since for the time
 558 # being it's only this one, we just single it out
 559 while (my ($name, $symbol) = each %cgi_param_mapping) {
 560         if ($symbol eq 'opt') {
 561                 $input_params{$name} = [ $cgi->param($symbol) ];
 562         } else {
 563                 $input_params{$name} = $cgi->param($symbol);
 564         }
 565 }
 566
 567 # now read PATH_INFO and update the parameter list for missing parameters
 568 sub evaluate_path_info {
 569         return if defined $input_params{'project'};
 570         return if !$path_info;
 571         $path_info =~ s,^/+,,;
 572         return if !$path_info;
 573
 574         # find which part of PATH_INFO is project
 575         my $project = $path_info;
 576         $project =~ s,/+$,,;
 577         while ($project && !check_head_link("$projectroot/$project")) {
 578                 $project =~ s,/*[^/]*$,,;
 579         }
 580         return unless $project;
 581         $input_params{'project'} = $project;
 582
 583         # do not change any parameters if an action is given using the query string
 584         return if $input_params{'action'};
 585         $path_info =~ s,^\Q$project\E/*,,;
 586
 587         # next, check if we have an action
 588         my $action = $path_info;
 589         $action =~ s,/.*$,,;
 590         if (exists $actions{$action}) {
 591                 $path_info =~ s,^$action/*,,;
 592                 $input_params{'action'} = $action;
 593         }
 594
 595         # list of actions that want hash_base instead of hash, but can have no
 596         # pathname (f) parameter
 597         my @wants_base = (
 598                 'tree',
 599                 'history',
 600         );
 601
 602         # we want to catch
 603         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 604         my ($parentrefname, $parentpathname, $refname, $pathname) =
 605                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 606
 607         # first, analyze the 'current' part
 608         if (defined $pathname) {
 609                 # we got "branch:filename" or "branch:dir/"
 610                 # we could use git_get_type(branch:pathname), but:
 611                 # - it needs $git_dir
 612                 # - it does a git() call
 613                 # - the convention of terminating directories with a slash
 614                 #   makes it superfluous
 615                 # - embedding the action in the PATH_INFO would make it even
 616                 #   more superfluous
 617                 $pathname =~ s,^/+,,;
 618                 if (!$pathname || substr($pathname, -1) eq "/") {
 619                         $input_params{'action'} ||= "tree";
 620                         $pathname =~ s,/$,,;
 621                 } else {
 622                         # the default action depends on whether we had parent info
 623                         # or not
 624                         if ($parentrefname) {
 625                                 $input_params{'action'} ||= "blobdiff_plain";
 626                         } else {
 627                                 $input_params{'action'} ||= "blob_plain";
 628                         }
 629                 }
 630                 $input_params{'hash_base'} ||= $refname;
 631                 $input_params{'file_name'} ||= $pathname;
 632         } elsif (defined $refname) {
 633                 # we got "branch". In this case we have to choose if we have to
 634                 # set hash or hash_base.
 635                 #
 636                 # Most of the actions without a pathname only want hash to be
 637                 # set, except for the ones specified in @wants_base that want
 638                 # hash_base instead. It should also be noted that hand-crafted
 639                 # links having 'history' as an action and no pathname or hash
 640                 # set will fail, but that happens regardless of PATH_INFO.
 641                 $input_params{'action'} ||= "shortlog";
 642                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 643                         $input_params{'hash_base'} ||= $refname;
 644                 } else {
 645                         $input_params{'hash'} ||= $refname;
 646                 }
 647         }
 648
 649         # next, handle the 'parent' part, if present
 650         if (defined $parentrefname) {
 651                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 652                 # someproject/blobdiff/oldrev..newrev:/filename
 653                 if ($parentpathname) {
 654                         $parentpathname =~ s,^/+,,;
 655                         $parentpathname =~ s,/$,,;
 656                         $input_params{'file_parent'} ||= $parentpathname;
 657                 } else {
 658                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 659                 }
 660                 # we assume that hash_parent_base is wanted if a path was specified,
 661                 # or if the action wants hash_base instead of hash
 662                 if (defined $input_params{'file_parent'} ||
 663                         grep { $_ eq $input_params{'action'} } @wants_base) {
 664                         $input_params{'hash_parent_base'} ||= $parentrefname;
 665                 } else {
 666                         $input_params{'hash_parent'} ||= $parentrefname;
 667                 }
 668         }
 669
 670         # for the snapshot action, we allow URLs in the form
 671         # $project/snapshot/$hash.ext
 672         # where .ext determines the snapshot and gets removed from the
 673         # passed $refname to provide the $hash.
 674         #
 675         # To be able to tell that $refname includes the format extension, we
 676         # require the following two conditions to be satisfied:
 677         # - the hash input parameter MUST have been set from the $refname part
 678         #   of the URL (i.e. they must be equal)
 679         # - the snapshot format MUST NOT have been defined already (e.g. from
 680         #   CGI parameter sf)
 681         # It's also useless to try any matching unless $refname has a dot,
 682         # so we check for that too
 683         if (defined $input_params{'action'} &&
 684                 $input_params{'action'} eq 'snapshot' &&
 685                 defined $refname && index($refname, '.') != -1 &&
 686                 $refname eq $input_params{'hash'} &&
 687                 !defined $input_params{'snapshot_format'}) {
 688                 # We loop over the known snapshot formats, checking for
 689                 # extensions. Allowed extensions are both the defined suffix
 690                 # (which includes the initial dot already) and the snapshot
 691                 # format key itself, with a prepended dot
 692                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 693                         my $hash = $refname;
 694                         my $sfx;
 695                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 696                         next unless $sfx = $1;
 697                         # a valid suffix was found, so set the snapshot format
 698                         # and reset the hash parameter
 699                         $input_params{'snapshot_format'} = $fmt;
 700                         $input_params{'hash'} = $hash;
 701                         # we also set the format suffix to the one requested
 702                         # in the URL: this way a request for e.g. .tgz returns
 703                         # a .tgz instead of a .tar.gz
 704                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 705                         last;
 706                 }
 707         }
 708 }
 709 evaluate_path_info();
 710
 711 our $action = $input_params{'action'};
 712 if (defined $action) {
 713         if (!validate_action($action)) {
 714                 die_error(400, "Invalid action parameter");
 715         }
 716 }
 717
 718 # parameters which are pathnames
 719 our $project = $input_params{'project'};
 720 if (defined $project) {
 721         if (!validate_project($project)) {
 722                 undef $project;
 723                 die_error(404, "No such project");
 724         }
 725 }
 726
 727 our $file_name = $input_params{'file_name'};
 728 if (defined $file_name) {
 729         if (!validate_pathname($file_name)) {
 730                 die_error(400, "Invalid file parameter");
 731         }
 732 }
 733
 734 our $file_parent = $input_params{'file_parent'};
 735 if (defined $file_parent) {
 736         if (!validate_pathname($file_parent)) {
 737                 die_error(400, "Invalid file parent parameter");
 738         }
 739 }
 740
 741 # parameters which are refnames
 742 our $hash = $input_params{'hash'};
 743 if (defined $hash) {
 744         if (!validate_refname($hash)) {
 745                 die_error(400, "Invalid hash parameter");
 746         }
 747 }
 748
 749 our $hash_parent = $input_params{'hash_parent'};
 750 if (defined $hash_parent) {
 751         if (!validate_refname($hash_parent)) {
 752                 die_error(400, "Invalid hash parent parameter");
 753         }
 754 }
 755
 756 our $hash_base = $input_params{'hash_base'};
 757 if (defined $hash_base) {
 758         if (!validate_refname($hash_base)) {
 759                 die_error(400, "Invalid hash base parameter");
 760         }
 761 }
 762
 763 our @extra_options = @{$input_params{'extra_options'}};
 764 # @extra_options is always defined, since it can only be (currently) set from
 765 # CGI, and $cgi->param() returns the empty array in array context if the param
 766 # is not set
 767 foreach my $opt (@extra_options) {
 768         if (not exists $allowed_options{$opt}) {
 769                 die_error(400, "Invalid option parameter");
 770         }
 771         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 772                 die_error(400, "Invalid option parameter for this action");
 773         }
 774 }
 775
 776 our $hash_parent_base = $input_params{'hash_parent_base'};
 777 if (defined $hash_parent_base) {
 778         if (!validate_refname($hash_parent_base)) {
 779                 die_error(400, "Invalid hash parent base parameter");
 780         }
 781 }
 782
 783 # other parameters
 784 our $page = $input_params{'page'};
 785 if (defined $page) {
 786         if ($page =~ m/[^0-9]/) {
 787                 die_error(400, "Invalid page parameter");
 788         }
 789 }
 790
 791 our $searchtype = $input_params{'searchtype'};
 792 if (defined $searchtype) {
 793         if ($searchtype =~ m/[^a-z]/) {
 794                 die_error(400, "Invalid searchtype parameter");
 795         }
 796 }
 797
 798 our $search_use_regexp = $input_params{'search_use_regexp'};
 799
 800 our $searchtext = $input_params{'searchtext'};
 801 our $search_regexp;
 802 if (defined $searchtext) {
 803         if (length($searchtext) < 2) {
 804                 die_error(403, "At least two characters are required for search parameter");
 805         }
 806         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 807 }
 808
 809 # path to the current git repository
 810 our $git_dir;
 811 $git_dir = "$projectroot/$project" if $project;
 812
 813 # list of supported snapshot formats
 814 our @snapshot_fmts = gitweb_get_feature('snapshot');
 815 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 816
 817 # dispatch
 818 if (!defined $action) {
 819         if (defined $hash) {
 820                 $action = git_get_type($hash);
 821         } elsif (defined $hash_base && defined $file_name) {
 822                 $action = git_get_type("$hash_base:$file_name");
 823         } elsif (defined $project) {
 824                 $action = 'summary';
 825         } else {
 826                 $action = 'project_list';
 827         }
 828 }
 829 if (!defined($actions{$action})) {
 830         die_error(400, "Unknown action");
 831 }
 832 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 833     !$project) {
 834         die_error(400, "Project needed");
 835 }
 836 $actions{$action}->();
 837 exit;
 838
 839 ## ======================================================================
 840 ## action links
 841
 842 sub href (%) {
 843         my %params = @_;
 844         # default is to use -absolute url() i.e. $my_uri
 845         my $href = $params{-full} ? $my_url : $my_uri;
 846
 847         $params{'project'} = $project unless exists $params{'project'};
 848
 849         if ($params{-replay}) {
 850                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 851                         if (!exists $params{$name}) {
 852                                 $params{$name} = $input_params{$name};
 853                         }
 854                 }
 855         }
 856
 857         my $use_pathinfo = gitweb_check_feature('pathinfo');
 858         if ($use_pathinfo and defined $params{'project'}) {
 859                 # try to put as many parameters as possible in PATH_INFO:
 860                 #   - project name
 861                 #   - action
 862                 #   - hash_parent or hash_parent_base:/file_parent
 863                 #   - hash or hash_base:/filename
 864                 #   - the snapshot_format as an appropriate suffix
 865
 866                 # When the script is the root DirectoryIndex for the domain,
 867                 # $href here would be something like http://gitweb.example.com/
 868                 # Thus, we strip any trailing / from $href, to spare us double
 869                 # slashes in the final URL
 870                 $href =~ s,/$,,;
 871
 872                 # Then add the project name, if present
 873                 $href .= "/".esc_url($params{'project'});
 874                 delete $params{'project'};
 875
 876                 # since we destructively absorb parameters, we keep this
 877                 # boolean that remembers if we're handling a snapshot
 878                 my $is_snapshot = $params{'action'} eq 'snapshot';
 879
 880                 # Summary just uses the project path URL, any other action is
 881                 # added to the URL
 882                 if (defined $params{'action'}) {
 883                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 884                         delete $params{'action'};
 885                 }
 886
 887                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 888                 # stripping nonexistent or useless pieces
 889                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 890                         || $params{'hash_parent'} || $params{'hash'});
 891                 if (defined $params{'hash_base'}) {
 892                         if (defined $params{'hash_parent_base'}) {
 893                                 $href .= esc_url($params{'hash_parent_base'});
 894                                 # skip the file_parent if it's the same as the file_name
 895                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 896                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 897                                         $href .= ":/".esc_url($params{'file_parent'});
 898                                         delete $params{'file_parent'};
 899                                 }
 900                                 $href .= "..";
 901                                 delete $params{'hash_parent'};
 902                                 delete $params{'hash_parent_base'};
 903                         } elsif (defined $params{'hash_parent'}) {
 904                                 $href .= esc_url($params{'hash_parent'}). "..";
 905                                 delete $params{'hash_parent'};
 906                         }
 907
 908                         $href .= esc_url($params{'hash_base'});
 909                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 910                                 $href .= ":/".esc_url($params{'file_name'});
 911                                 delete $params{'file_name'};
 912                         }
 913                         delete $params{'hash'};
 914                         delete $params{'hash_base'};
 915                 } elsif (defined $params{'hash'}) {
 916                         $href .= esc_url($params{'hash'});
 917                         delete $params{'hash'};
 918                 }
 919
 920                 # If the action was a snapshot, we can absorb the
 921                 # snapshot_format parameter too
 922                 if ($is_snapshot) {
 923                         my $fmt = $params{'snapshot_format'};
 924                         # snapshot_format should always be defined when href()
 925                         # is called, but just in case some code forgets, we
 926                         # fall back to the default
 927                         $fmt ||= $snapshot_fmts[0];
 928                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 929                         delete $params{'snapshot_format'};
 930                 }
 931         }
 932
 933         # now encode the parameters explicitly
 934         my @result = ();
 935         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 936                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 937                 if (defined $params{$name}) {
 938                         if (ref($params{$name}) eq "ARRAY") {
 939                                 foreach my $par (@{$params{$name}}) {
 940                                         push @result, $symbol . "=" . esc_param($par);
 941                                 }
 942                         } else {
 943                                 push @result, $symbol . "=" . esc_param($params{$name});
 944                         }
 945                 }
 946         }
 947         $href .= "?" . join(';', @result) if scalar @result;
 948
 949         return $href;
 950 }
 951
 952
 953 ## ======================================================================
 954 ## validation, quoting/unquoting and escaping
 955
 956 sub validate_action {
 957         my $input = shift || return undef;
 958         return undef unless exists $actions{$input};
 959         return $input;
 960 }
 961
 962 sub validate_project {
 963         my $input = shift || return undef;
 964         if (!validate_pathname($input) ||
 965                 !(-d "$projectroot/$input") ||
 966                 !check_export_ok("$projectroot/$input") ||
 967                 ($strict_export && !project_in_list($input))) {
 968                 return undef;
 969         } else {
 970                 return $input;
 971         }
 972 }
 973
 974 sub validate_pathname {
 975         my $input = shift || return undef;
 976
 977         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 978         # at the beginning, at the end, and between slashes.
 979         # also this catches doubled slashes
 980         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 981                 return undef;
 982         }
 983         # no null characters
 984         if ($input =~ m!\0!) {
 985                 return undef;
 986         }
 987         return $input;
 988 }
 989
 990 sub validate_refname {
 991         my $input = shift || return undef;
 992
 993         # textual hashes are O.K.
 994         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 995                 return $input;
 996         }
 997         # it must be correct pathname
 998         $input = validate_pathname($input)
 999                 or return undef;
1000         # restrictions on ref name according to git-check-ref-format
1001         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1002                 return undef;
1003         }
1004         return $input;
1005 }
1006
1007 # decode sequences of octets in utf8 into Perl's internal form,
1008 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1009 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1010 sub to_utf8 {
1011         my $str = shift;
1012         if (utf8::valid($str)) {
1013                 utf8::decode($str);
1014                 return $str;
1015         } else {
1016                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1017         }
1018 }
1019
1020 # quote unsafe chars, but keep the slash, even when it's not
1021 # correct, but quoted slashes look too horrible in bookmarks
1022 sub esc_param {
1023         my $str = shift;
1024         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1025         $str =~ s/\+/%2B/g;
1026         $str =~ s/ /\+/g;
1027         return $str;
1028 }
1029
1030 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1031 sub esc_url {
1032         my $str = shift;
1033         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1034         $str =~ s/\+/%2B/g;
1035         $str =~ s/ /\+/g;
1036         return $str;
1037 }
1038
1039 # replace invalid utf8 character with SUBSTITUTION sequence
1040 sub esc_html ($;%) {
1041         my $str = shift;
1042         my %opts = @_;
1043
1044         $str = to_utf8($str);
1045         $str = $cgi->escapeHTML($str);
1046         if ($opts{'-nbsp'}) {
1047                 $str =~ s/ /&nbsp;/g;
1048         }
1049         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1050         return $str;
1051 }
1052
1053 # quote control characters and escape filename to HTML
1054 sub esc_path {
1055         my $str = shift;
1056         my %opts = @_;
1057
1058         $str = to_utf8($str);
1059         $str = $cgi->escapeHTML($str);
1060         if ($opts{'-nbsp'}) {
1061                 $str =~ s/ /&nbsp;/g;
1062         }
1063         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1064         return $str;
1065 }
1066
1067 # Make control characters "printable", using character escape codes (CEC)
1068 sub quot_cec {
1069         my $cntrl = shift;
1070         my %opts = @_;
1071         my %es = ( # character escape codes, aka escape sequences
1072                 "\t" => '\t',   # tab            (HT)
1073                 "\n" => '\n',   # line feed      (LF)
1074                 "\r" => '\r',   # carrige return (CR)
1075                 "\f" => '\f',   # form feed      (FF)
1076                 "\b" => '\b',   # backspace      (BS)
1077                 "\a" => '\a',   # alarm (bell)   (BEL)
1078                 "\e" => '\e',   # escape         (ESC)
1079                 "\013" => '\v', # vertical tab   (VT)
1080                 "\000" => '\0', # nul character  (NUL)
1081         );
1082         my $chr = ( (exists $es{$cntrl})
1083                     ? $es{$cntrl}
1084                     : sprintf('\%2x', ord($cntrl)) );
1085         if ($opts{-nohtml}) {
1086                 return $chr;
1087         } else {
1088                 return "<span class=\"cntrl\">$chr</span>";
1089         }
1090 }
1091
1092 # Alternatively use unicode control pictures codepoints,
1093 # Unicode "printable representation" (PR)
1094 sub quot_upr {
1095         my $cntrl = shift;
1096         my %opts = @_;
1097
1098         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1099         if ($opts{-nohtml}) {
1100                 return $chr;
1101         } else {
1102                 return "<span class=\"cntrl\">$chr</span>";
1103         }
1104 }
1105
1106 # git may return quoted and escaped filenames
1107 sub unquote {
1108         my $str = shift;
1109
1110         sub unq {
1111                 my $seq = shift;
1112                 my %es = ( # character escape codes, aka escape sequences
1113                         't' => "\t",   # tab            (HT, TAB)
1114                         'n' => "\n",   # newline        (NL)
1115                         'r' => "\r",   # return         (CR)
1116                         'f' => "\f",   # form feed      (FF)
1117                         'b' => "\b",   # backspace      (BS)
1118                         'a' => "\a",   # alarm (bell)   (BEL)
1119                         'e' => "\e",   # escape         (ESC)
1120                         'v' => "\013", # vertical tab   (VT)
1121                 );
1122
1123                 if ($seq =~ m/^[0-7]{1,3}$/) {
1124                         # octal char sequence
1125                         return chr(oct($seq));
1126                 } elsif (exists $es{$seq}) {
1127                         # C escape sequence, aka character escape code
1128                         return $es{$seq};
1129                 }
1130                 # quoted ordinary character
1131                 return $seq;
1132         }
1133
1134         if ($str =~ m/^"(.*)"$/) {
1135                 # needs unquoting
1136                 $str = $1;
1137                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1138         }
1139         return $str;
1140 }
1141
1142 # escape tabs (convert tabs to spaces)
1143 sub untabify {
1144         my $line = shift;
1145
1146         while ((my $pos = index($line, "\t")) != -1) {
1147                 if (my $count = (8 - ($pos % 8))) {
1148                         my $spaces = ' ' x $count;
1149                         $line =~ s/\t/$spaces/;
1150                 }
1151         }
1152
1153         return $line;
1154 }
1155
1156 sub project_in_list {
1157         my $project = shift;
1158         my @list = git_get_projects_list();
1159         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1160 }
1161
1162 ## ----------------------------------------------------------------------
1163 ## HTML aware string manipulation
1164
1165 # Try to chop given string on a word boundary between position
1166 # $len and $len+$add_len. If there is no word boundary there,
1167 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1168 # (marking chopped part) would be longer than given string.
1169 sub chop_str {
1170         my $str = shift;
1171         my $len = shift;
1172         my $add_len = shift || 10;
1173         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1174
1175         # Make sure perl knows it is utf8 encoded so we don't
1176         # cut in the middle of a utf8 multibyte char.
1177         $str = to_utf8($str);
1178
1179         # allow only $len chars, but don't cut a word if it would fit in $add_len
1180         # if it doesn't fit, cut it if it's still longer than the dots we would add
1181         # remove chopped character entities entirely
1182
1183         # when chopping in the middle, distribute $len into left and right part
1184         # return early if chopping wouldn't make string shorter
1185         if ($where eq 'center') {
1186                 return $str if ($len + 5 >= length($str)); # filler is length 5
1187                 $len = int($len/2);
1188         } else {
1189                 return $str if ($len + 4 >= length($str)); # filler is length 4
1190         }
1191
1192         # regexps: ending and beginning with word part up to $add_len
1193         my $endre = qr/.{$len}\w{0,$add_len}/;
1194         my $begre = qr/\w{0,$add_len}.{$len}/;
1195
1196         if ($where eq 'left') {
1197                 $str =~ m/^(.*?)($begre)$/;
1198                 my ($lead, $body) = ($1, $2);
1199                 if (length($lead) > 4) {
1200                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1201                         $lead = " ...";
1202                 }
1203                 return "$lead$body";
1204
1205         } elsif ($where eq 'center') {
1206                 $str =~ m/^($endre)(.*)$/;
1207                 my ($left, $str)  = ($1, $2);
1208                 $str =~ m/^(.*?)($begre)$/;
1209                 my ($mid, $right) = ($1, $2);
1210                 if (length($mid) > 5) {
1211                         $left  =~ s/&[^;]*$//;
1212                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1213                         $mid = " ... ";
1214                 }
1215                 return "$left$mid$right";
1216
1217         } else {
1218                 $str =~ m/^($endre)(.*)$/;
1219                 my $body = $1;
1220                 my $tail = $2;
1221                 if (length($tail) > 4) {
1222                         $body =~ s/&[^;]*$//;
1223                         $tail = "... ";
1224                 }
1225                 return "$body$tail";
1226         }
1227 }
1228
1229 # takes the same arguments as chop_str, but also wraps a <span> around the
1230 # result with a title attribute if it does get chopped. Additionally, the
1231 # string is HTML-escaped.
1232 sub chop_and_escape_str {
1233         my ($str) = @_;
1234
1235         my $chopped = chop_str(@_);
1236         if ($chopped eq $str) {
1237                 return esc_html($chopped);
1238         } else {
1239                 $str =~ s/([[:cntrl:]])/?/g;
1240                 return $cgi->span({-title=>$str}, esc_html($chopped));
1241         }
1242 }
1243
1244 ## ----------------------------------------------------------------------
1245 ## functions returning short strings
1246
1247 # CSS class for given age value (in seconds)
1248 sub age_class {
1249         my $age = shift;
1250
1251         if (!defined $age) {
1252                 return "noage";
1253         } elsif ($age < 60*60*2) {
1254                 return "age0";
1255         } elsif ($age < 60*60*24*2) {
1256                 return "age1";
1257         } else {
1258                 return "age2";
1259         }
1260 }
1261
1262 # convert age in seconds to "nn units ago" string
1263 sub age_string {
1264         my $age = shift;
1265         my $age_str;
1266
1267         if ($age > 60*60*24*365*2) {
1268                 $age_str = (int $age/60/60/24/365);
1269                 $age_str .= " years ago";
1270         } elsif ($age > 60*60*24*(365/12)*2) {
1271                 $age_str = int $age/60/60/24/(365/12);
1272                 $age_str .= " months ago";
1273         } elsif ($age > 60*60*24*7*2) {
1274                 $age_str = int $age/60/60/24/7;
1275                 $age_str .= " weeks ago";
1276         } elsif ($age > 60*60*24*2) {
1277                 $age_str = int $age/60/60/24;
1278                 $age_str .= " days ago";
1279         } elsif ($age > 60*60*2) {
1280                 $age_str = int $age/60/60;
1281                 $age_str .= " hours ago";
1282         } elsif ($age > 60*2) {
1283                 $age_str = int $age/60;
1284                 $age_str .= " min ago";
1285         } elsif ($age > 2) {
1286                 $age_str = int $age;
1287                 $age_str .= " sec ago";
1288         } else {
1289                 $age_str .= " right now";
1290         }
1291         return $age_str;
1292 }
1293
1294 use constant {
1295         S_IFINVALID => 0030000,
1296         S_IFGITLINK => 0160000,
1297 };
1298
1299 # submodule/subproject, a commit object reference
1300 sub S_ISGITLINK($) {
1301         my $mode = shift;
1302
1303         return (($mode & S_IFMT) == S_IFGITLINK)
1304 }
1305
1306 # convert file mode in octal to symbolic file mode string
1307 sub mode_str {
1308         my $mode = oct shift;
1309
1310         if (S_ISGITLINK($mode)) {
1311                 return 'm---------';
1312         } elsif (S_ISDIR($mode & S_IFMT)) {
1313                 return 'drwxr-xr-x';
1314         } elsif (S_ISLNK($mode)) {
1315                 return 'lrwxrwxrwx';
1316         } elsif (S_ISREG($mode)) {
1317                 # git cares only about the executable bit
1318                 if ($mode & S_IXUSR) {
1319                         return '-rwxr-xr-x';
1320                 } else {
1321                         return '-rw-r--r--';
1322                 };
1323         } else {
1324                 return '----------';
1325         }
1326 }
1327
1328 # convert file mode in octal to file type string
1329 sub file_type {
1330         my $mode = shift;
1331
1332         if ($mode !~ m/^[0-7]+$/) {
1333                 return $mode;
1334         } else {
1335                 $mode = oct $mode;
1336         }
1337
1338         if (S_ISGITLINK($mode)) {
1339                 return "submodule";
1340         } elsif (S_ISDIR($mode & S_IFMT)) {
1341                 return "directory";
1342         } elsif (S_ISLNK($mode)) {
1343                 return "symlink";
1344         } elsif (S_ISREG($mode)) {
1345                 return "file";
1346         } else {
1347                 return "unknown";
1348         }
1349 }
1350
1351 # convert file mode in octal to file type description string
1352 sub file_type_long {
1353         my $mode = shift;
1354
1355         if ($mode !~ m/^[0-7]+$/) {
1356                 return $mode;
1357         } else {
1358                 $mode = oct $mode;
1359         }
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return "submodule";
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return "directory";
1365         } elsif (S_ISLNK($mode)) {
1366                 return "symlink";
1367         } elsif (S_ISREG($mode)) {
1368                 if ($mode & S_IXUSR) {
1369                         return "executable";
1370                 } else {
1371                         return "file";
1372                 };
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378
1379 ## ----------------------------------------------------------------------
1380 ## functions returning short HTML fragments, or transforming HTML fragments
1381 ## which don't belong to other sections
1382
1383 # format line of commit message.
1384 sub format_log_line_html {
1385         my $line = shift;
1386
1387         $line = esc_html($line, -nbsp=>1);
1388         if ($line =~ m/\b([0-9a-fA-F]{8,40})\b/) {
1389                 my $hash_text = $1;
1390                 my $link =
1391                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1392                                 -class => "text"}, $hash_text);
1393                 $line =~ s/$hash_text/$link/;
1394         }
1395         return $line;
1396 }
1397
1398 # format marker of refs pointing to given object
1399
1400 # the destination action is chosen based on object type and current context:
1401 # - for annotated tags, we choose the tag view unless it's the current view
1402 #   already, in which case we go to shortlog view
1403 # - for other refs, we keep the current view if we're in history, shortlog or
1404 #   log view, and select shortlog otherwise
1405 sub format_ref_marker {
1406         my ($refs, $id) = @_;
1407         my $markers = '';
1408
1409         if (defined $refs->{$id}) {
1410                 foreach my $ref (@{$refs->{$id}}) {
1411                         # this code exploits the fact that non-lightweight tags are the
1412                         # only indirect objects, and that they are the only objects for which
1413                         # we want to use tag instead of shortlog as action
1414                         my ($type, $name) = qw();
1415                         my $indirect = ($ref =~ s/\^\{\}$//);
1416                         # e.g. tags/v2.6.11 or heads/next
1417                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1418                                 $type = $1;
1419                                 $name = $2;
1420                         } else {
1421                                 $type = "ref";
1422                                 $name = $ref;
1423                         }
1424
1425                         my $class = $type;
1426                         $class .= " indirect" if $indirect;
1427
1428                         my $dest_action = "shortlog";
1429
1430                         if ($indirect) {
1431                                 $dest_action = "tag" unless $action eq "tag";
1432                         } elsif ($action =~ /^(history|(short)?log)$/) {
1433                                 $dest_action = $action;
1434                         }
1435
1436                         my $dest = "";
1437                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1438                         $dest .= $ref;
1439
1440                         my $link = $cgi->a({
1441                                 -href => href(
1442                                         action=>$dest_action,
1443                                         hash=>$dest
1444                                 )}, $name);
1445
1446                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1447                                 $link . "</span>";
1448                 }
1449         }
1450
1451         if ($markers) {
1452                 return ' <span class="refs">'. $markers . '</span>';
1453         } else {
1454                 return "";
1455         }
1456 }
1457
1458 # format, perhaps shortened and with markers, title line
1459 sub format_subject_html {
1460         my ($long, $short, $href, $extra) = @_;
1461         $extra = '' unless defined($extra);
1462
1463         if (length($short) < length($long)) {
1464                 return $cgi->a({-href => $href, -class => "list subject",
1465                                 -title => to_utf8($long)},
1466                        esc_html($short) . $extra);
1467         } else {
1468                 return $cgi->a({-href => $href, -class => "list subject"},
1469                        esc_html($long)  . $extra);
1470         }
1471 }
1472
1473 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1474 sub format_git_diff_header_line {
1475         my $line = shift;
1476         my $diffinfo = shift;
1477         my ($from, $to) = @_;
1478
1479         if ($diffinfo->{'nparents'}) {
1480                 # combined diff
1481                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1482                 if ($to->{'href'}) {
1483                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1484                                          esc_path($to->{'file'}));
1485                 } else { # file was deleted (no href)
1486                         $line .= esc_path($to->{'file'});
1487                 }
1488         } else {
1489                 # "ordinary" diff
1490                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1491                 if ($from->{'href'}) {
1492                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1493                                          'a/' . esc_path($from->{'file'}));
1494                 } else { # file was added (no href)
1495                         $line .= 'a/' . esc_path($from->{'file'});
1496                 }
1497                 $line .= ' ';
1498                 if ($to->{'href'}) {
1499                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1500                                          'b/' . esc_path($to->{'file'}));
1501                 } else { # file was deleted
1502                         $line .= 'b/' . esc_path($to->{'file'});
1503                 }
1504         }
1505
1506         return "<div class=\"diff header\">$line</div>\n";
1507 }
1508
1509 # format extended diff header line, before patch itself
1510 sub format_extended_diff_header_line {
1511         my $line = shift;
1512         my $diffinfo = shift;
1513         my ($from, $to) = @_;
1514
1515         # match <path>
1516         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1517                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1518                                        esc_path($from->{'file'}));
1519         }
1520         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1521                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1522                                  esc_path($to->{'file'}));
1523         }
1524         # match single <mode>
1525         if ($line =~ m/\s(\d{6})$/) {
1526                 $line .= '<span class="info"> (' .
1527                          file_type_long($1) .
1528                          ')</span>';
1529         }
1530         # match <hash>
1531         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1532                 # can match only for combined diff
1533                 $line = 'index ';
1534                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1535                         if ($from->{'href'}[$i]) {
1536                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1537                                                   -class=>"hash"},
1538                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1539                         } else {
1540                                 $line .= '0' x 7;
1541                         }
1542                         # separator
1543                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1544                 }
1545                 $line .= '..';
1546                 if ($to->{'href'}) {
1547                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1548                                          substr($diffinfo->{'to_id'},0,7));
1549                 } else {
1550                         $line .= '0' x 7;
1551                 }
1552
1553         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1554                 # can match only for ordinary diff
1555                 my ($from_link, $to_link);
1556                 if ($from->{'href'}) {
1557                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1558                                              substr($diffinfo->{'from_id'},0,7));
1559                 } else {
1560                         $from_link = '0' x 7;
1561                 }
1562                 if ($to->{'href'}) {
1563                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1564                                            substr($diffinfo->{'to_id'},0,7));
1565                 } else {
1566                         $to_link = '0' x 7;
1567                 }
1568                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1569                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1570         }
1571
1572         return $line . "<br/>\n";
1573 }
1574
1575 # format from-file/to-file diff header
1576 sub format_diff_from_to_header {
1577         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1578         my $line;
1579         my $result = '';
1580
1581         $line = $from_line;
1582         #assert($line =~ m/^---/) if DEBUG;
1583         # no extra formatting for "^--- /dev/null"
1584         if (! $diffinfo->{'nparents'}) {
1585                 # ordinary (single parent) diff
1586                 if ($line =~ m!^--- "?a/!) {
1587                         if ($from->{'href'}) {
1588                                 $line = '--- a/' .
1589                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1590                                                 esc_path($from->{'file'}));
1591                         } else {
1592                                 $line = '--- a/' .
1593                                         esc_path($from->{'file'});
1594                         }
1595                 }
1596                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1597
1598         } else {
1599                 # combined diff (merge commit)
1600                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1601                         if ($from->{'href'}[$i]) {
1602                                 $line = '--- ' .
1603                                         $cgi->a({-href=>href(action=>"blobdiff",
1604                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1605                                                              hash_parent_base=>$parents[$i],
1606                                                              file_parent=>$from->{'file'}[$i],
1607                                                              hash=>$diffinfo->{'to_id'},
1608                                                              hash_base=>$hash,
1609                                                              file_name=>$to->{'file'}),
1610                                                  -class=>"path",
1611                                                  -title=>"diff" . ($i+1)},
1612                                                 $i+1) .
1613                                         '/' .
1614                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1615                                                 esc_path($from->{'file'}[$i]));
1616                         } else {
1617                                 $line = '--- /dev/null';
1618                         }
1619                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1620                 }
1621         }
1622
1623         $line = $to_line;
1624         #assert($line =~ m/^\+\+\+/) if DEBUG;
1625         # no extra formatting for "^+++ /dev/null"
1626         if ($line =~ m!^\+\+\+ "?b/!) {
1627                 if ($to->{'href'}) {
1628                         $line = '+++ b/' .
1629                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1630                                         esc_path($to->{'file'}));
1631                 } else {
1632                         $line = '+++ b/' .
1633                                 esc_path($to->{'file'});
1634                 }
1635         }
1636         $result .= qq!<div class="diff to_file">$line</div>\n!;
1637
1638         return $result;
1639 }
1640
1641 # create note for patch simplified by combined diff
1642 sub format_diff_cc_simplified {
1643         my ($diffinfo, @parents) = @_;
1644         my $result = '';
1645
1646         $result .= "<div class=\"diff header\">" .
1647                    "diff --cc ";
1648         if (!is_deleted($diffinfo)) {
1649                 $result .= $cgi->a({-href => href(action=>"blob",
1650                                                   hash_base=>$hash,
1651                                                   hash=>$diffinfo->{'to_id'},
1652                                                   file_name=>$diffinfo->{'to_file'}),
1653                                     -class => "path"},
1654                                    esc_path($diffinfo->{'to_file'}));
1655         } else {
1656                 $result .= esc_path($diffinfo->{'to_file'});
1657         }
1658         $result .= "</div>\n" . # class="diff header"
1659                    "<div class=\"diff nodifferences\">" .
1660                    "Simple merge" .
1661                    "</div>\n"; # class="diff nodifferences"
1662
1663         return $result;
1664 }
1665
1666 # format patch (diff) line (not to be used for diff headers)
1667 sub format_diff_line {
1668         my $line = shift;
1669         my ($from, $to) = @_;
1670         my $diff_class = "";
1671
1672         chomp $line;
1673
1674         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1675                 # combined diff
1676                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1677                 if ($line =~ m/^\@{3}/) {
1678                         $diff_class = " chunk_header";
1679                 } elsif ($line =~ m/^\\/) {
1680                         $diff_class = " incomplete";
1681                 } elsif ($prefix =~ tr/+/+/) {
1682                         $diff_class = " add";
1683                 } elsif ($prefix =~ tr/-/-/) {
1684                         $diff_class = " rem";
1685                 }
1686         } else {
1687                 # assume ordinary diff
1688                 my $char = substr($line, 0, 1);
1689                 if ($char eq '+') {
1690                         $diff_class = " add";
1691                 } elsif ($char eq '-') {
1692                         $diff_class = " rem";
1693                 } elsif ($char eq '@') {
1694                         $diff_class = " chunk_header";
1695                 } elsif ($char eq "\\") {
1696                         $diff_class = " incomplete";
1697                 }
1698         }
1699         $line = untabify($line);
1700         if ($from && $to && $line =~ m/^\@{2} /) {
1701                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1702                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1703
1704                 $from_lines = 0 unless defined $from_lines;
1705                 $to_lines   = 0 unless defined $to_lines;
1706
1707                 if ($from->{'href'}) {
1708                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1709                                              -class=>"list"}, $from_text);
1710                 }
1711                 if ($to->{'href'}) {
1712                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1713                                              -class=>"list"}, $to_text);
1714                 }
1715                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1716                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1717                 return "<div class=\"diff$diff_class\">$line</div>\n";
1718         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1719                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1720                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1721
1722                 @from_text = split(' ', $ranges);
1723                 for (my $i = 0; $i < @from_text; ++$i) {
1724                         ($from_start[$i], $from_nlines[$i]) =
1725                                 (split(',', substr($from_text[$i], 1)), 0);
1726                 }
1727
1728                 $to_text   = pop @from_text;
1729                 $to_start  = pop @from_start;
1730                 $to_nlines = pop @from_nlines;
1731
1732                 $line = "<span class=\"chunk_info\">$prefix ";
1733                 for (my $i = 0; $i < @from_text; ++$i) {
1734                         if ($from->{'href'}[$i]) {
1735                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1736                                                   -class=>"list"}, $from_text[$i]);
1737                         } else {
1738                                 $line .= $from_text[$i];
1739                         }
1740                         $line .= " ";
1741                 }
1742                 if ($to->{'href'}) {
1743                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1744                                           -class=>"list"}, $to_text);
1745                 } else {
1746                         $line .= $to_text;
1747                 }
1748                 $line .= " $prefix</span>" .
1749                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1750                 return "<div class=\"diff$diff_class\">$line</div>\n";
1751         }
1752         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1753 }
1754
1755 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1756 # linked.  Pass the hash of the tree/commit to snapshot.
1757 sub format_snapshot_links {
1758         my ($hash) = @_;
1759         my $num_fmts = @snapshot_fmts;
1760         if ($num_fmts > 1) {
1761                 # A parenthesized list of links bearing format names.
1762                 # e.g. "snapshot (_tar.gz_ _zip_)"
1763                 return "snapshot (" . join(' ', map
1764                         $cgi->a({
1765                                 -href => href(
1766                                         action=>"snapshot",
1767                                         hash=>$hash,
1768                                         snapshot_format=>$_
1769                                 )
1770                         }, $known_snapshot_formats{$_}{'display'})
1771                 , @snapshot_fmts) . ")";
1772         } elsif ($num_fmts == 1) {
1773                 # A single "snapshot" link whose tooltip bears the format name.
1774                 # i.e. "_snapshot_"
1775                 my ($fmt) = @snapshot_fmts;
1776                 return
1777                         $cgi->a({
1778                                 -href => href(
1779                                         action=>"snapshot",
1780                                         hash=>$hash,
1781                                         snapshot_format=>$fmt
1782                                 ),
1783                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1784                         }, "snapshot");
1785         } else { # $num_fmts == 0
1786                 return undef;
1787         }
1788 }
1789
1790 ## ......................................................................
1791 ## functions returning values to be passed, perhaps after some
1792 ## transformation, to other functions; e.g. returning arguments to href()
1793
1794 # returns hash to be passed to href to generate gitweb URL
1795 # in -title key it returns description of link
1796 sub get_feed_info {
1797         my $format = shift || 'Atom';
1798         my %res = (action => lc($format));
1799
1800         # feed links are possible only for project views
1801         return unless (defined $project);
1802         # some views should link to OPML, or to generic project feed,
1803         # or don't have specific feed yet (so they should use generic)
1804         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1805
1806         my $branch;
1807         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1808         # from tag links; this also makes possible to detect branch links
1809         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1810             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1811                 $branch = $1;
1812         }
1813         # find log type for feed description (title)
1814         my $type = 'log';
1815         if (defined $file_name) {
1816                 $type  = "history of $file_name";
1817                 $type .= "/" if ($action eq 'tree');
1818                 $type .= " on '$branch'" if (defined $branch);
1819         } else {
1820                 $type = "log of $branch" if (defined $branch);
1821         }
1822
1823         $res{-title} = $type;
1824         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1825         $res{'file_name'} = $file_name;
1826
1827         return %res;
1828 }
1829
1830 ## ----------------------------------------------------------------------
1831 ## git utility subroutines, invoking git commands
1832
1833 # returns path to the core git executable and the --git-dir parameter as list
1834 sub git_cmd {
1835         return $GIT, '--git-dir='.$git_dir;
1836 }
1837
1838 # quote the given arguments for passing them to the shell
1839 # quote_command("command", "arg 1", "arg with ' and ! characters")
1840 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1841 # Try to avoid using this function wherever possible.
1842 sub quote_command {
1843         return join(' ',
1844                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1845 }
1846
1847 # get HEAD ref of given project as hash
1848 sub git_get_head_hash {
1849         my $project = shift;
1850         my $o_git_dir = $git_dir;
1851         my $retval = undef;
1852         $git_dir = "$projectroot/$project";
1853         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1854                 my $head = <$fd>;
1855                 close $fd;
1856                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1857                         $retval = $1;
1858                 }
1859         }
1860         if (defined $o_git_dir) {
1861                 $git_dir = $o_git_dir;
1862         }
1863         return $retval;
1864 }
1865
1866 # get type of given object
1867 sub git_get_type {
1868         my $hash = shift;
1869
1870         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1871         my $type = <$fd>;
1872         close $fd or return;
1873         chomp $type;
1874         return $type;
1875 }
1876
1877 # repository configuration
1878 our $config_file = '';
1879 our %config;
1880
1881 # store multiple values for single key as anonymous array reference
1882 # single values stored directly in the hash, not as [ <value> ]
1883 sub hash_set_multi {
1884         my ($hash, $key, $value) = @_;
1885
1886         if (!exists $hash->{$key}) {
1887                 $hash->{$key} = $value;
1888         } elsif (!ref $hash->{$key}) {
1889                 $hash->{$key} = [ $hash->{$key}, $value ];
1890         } else {
1891                 push @{$hash->{$key}}, $value;
1892         }
1893 }
1894
1895 # return hash of git project configuration
1896 # optionally limited to some section, e.g. 'gitweb'
1897 sub git_parse_project_config {
1898         my $section_regexp = shift;
1899         my %config;
1900
1901         local $/ = "\0";
1902
1903         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1904                 or return;
1905
1906         while (my $keyval = <$fh>) {
1907                 chomp $keyval;
1908                 my ($key, $value) = split(/\n/, $keyval, 2);
1909
1910                 hash_set_multi(\%config, $key, $value)
1911                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1912         }
1913         close $fh;
1914
1915         return %config;
1916 }
1917
1918 # convert config value to boolean: 'true' or 'false'
1919 # no value, number > 0, 'true' and 'yes' values are true
1920 # rest of values are treated as false (never as error)
1921 sub config_to_bool {
1922         my $val = shift;
1923
1924         return 1 if !defined $val;             # section.key
1925
1926         # strip leading and trailing whitespace
1927         $val =~ s/^\s+//;
1928         $val =~ s/\s+$//;
1929
1930         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1931                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1932 }
1933
1934 # convert config value to simple decimal number
1935 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1936 # to be multiplied by 1024, 1048576, or 1073741824
1937 sub config_to_int {
1938         my $val = shift;
1939
1940         # strip leading and trailing whitespace
1941         $val =~ s/^\s+//;
1942         $val =~ s/\s+$//;
1943
1944         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1945                 $unit = lc($unit);
1946                 # unknown unit is treated as 1
1947                 return $num * ($unit eq 'g' ? 1073741824 :
1948                                $unit eq 'm' ?    1048576 :
1949                                $unit eq 'k' ?       1024 : 1);
1950         }
1951         return $val;
1952 }
1953
1954 # convert config value to array reference, if needed
1955 sub config_to_multi {
1956         my $val = shift;
1957
1958         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1959 }
1960
1961 sub git_get_project_config {
1962         my ($key, $type) = @_;
1963
1964         # key sanity check
1965         return unless ($key);
1966         $key =~ s/^gitweb\.//;
1967         return if ($key =~ m/\W/);
1968
1969         # type sanity check
1970         if (defined $type) {
1971                 $type =~ s/^--//;
1972                 $type = undef
1973                         unless ($type eq 'bool' || $type eq 'int');
1974         }
1975
1976         # get config
1977         if (!defined $config_file ||
1978             $config_file ne "$git_dir/config") {
1979                 %config = git_parse_project_config('gitweb');
1980                 $config_file = "$git_dir/config";
1981         }
1982
1983         # check if config variable (key) exists
1984         return unless exists $config{"gitweb.$key"};
1985
1986         # ensure given type
1987         if (!defined $type) {
1988                 return $config{"gitweb.$key"};
1989         } elsif ($type eq 'bool') {
1990                 # backward compatibility: 'git config --bool' returns true/false
1991                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1992         } elsif ($type eq 'int') {
1993                 return config_to_int($config{"gitweb.$key"});
1994         }
1995         return $config{"gitweb.$key"};
1996 }
1997
1998 # get hash of given path at given ref
1999 sub git_get_hash_by_path {
2000         my $base = shift;
2001         my $path = shift || return undef;
2002         my $type = shift;
2003
2004         $path =~ s,/+$,,;
2005
2006         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2007                 or die_error(500, "Open git-ls-tree failed");
2008         my $line = <$fd>;
2009         close $fd or return undef;
2010
2011         if (!defined $line) {
2012                 # there is no tree or hash given by $path at $base
2013                 return undef;
2014         }
2015
2016         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2017         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2018         if (defined $type && $type ne $2) {
2019                 # type doesn't match
2020                 return undef;
2021         }
2022         return $3;
2023 }
2024
2025 # get path of entry with given hash at given tree-ish (ref)
2026 # used to get 'from' filename for combined diff (merge commit) for renames
2027 sub git_get_path_by_hash {
2028         my $base = shift || return;
2029         my $hash = shift || return;
2030
2031         local $/ = "\0";
2032
2033         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2034                 or return undef;
2035         while (my $line = <$fd>) {
2036                 chomp $line;
2037
2038                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2039                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2040                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2041                         close $fd;
2042                         return $1;
2043                 }
2044         }
2045         close $fd;
2046         return undef;
2047 }
2048
2049 ## ......................................................................
2050 ## git utility functions, directly accessing git repository
2051
2052 sub git_get_project_description {
2053         my $path = shift;
2054
2055         $git_dir = "$projectroot/$path";
2056         open my $fd, "$git_dir/description"
2057                 or return git_get_project_config('description');
2058         my $descr = <$fd>;
2059         close $fd;
2060         if (defined $descr) {
2061                 chomp $descr;
2062         }
2063         return $descr;
2064 }
2065
2066 sub git_get_project_ctags {
2067         my $path = shift;
2068         my $ctags = {};
2069
2070         $git_dir = "$projectroot/$path";
2071         unless (opendir D, "$git_dir/ctags") {
2072                 return $ctags;
2073         }
2074         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2075                 open CT, $_ or next;
2076                 my $val = <CT>;
2077                 chomp $val;
2078                 close CT;
2079                 my $ctag = $_; $ctag =~ s#.*/##;
2080                 $ctags->{$ctag} = $val;
2081         }
2082         closedir D;
2083         $ctags;
2084 }
2085
2086 sub git_populate_project_tagcloud {
2087         my $ctags = shift;
2088
2089         # First, merge different-cased tags; tags vote on casing
2090         my %ctags_lc;
2091         foreach (keys %$ctags) {
2092                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2093                 if (not $ctags_lc{lc $_}->{topcount}
2094                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2095                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2096                         $ctags_lc{lc $_}->{topname} = $_;
2097                 }
2098         }
2099
2100         my $cloud;
2101         if (eval { require HTML::TagCloud; 1; }) {
2102                 $cloud = HTML::TagCloud->new;
2103                 foreach (sort keys %ctags_lc) {
2104                         # Pad the title with spaces so that the cloud looks
2105                         # less crammed.
2106                         my $title = $ctags_lc{$_}->{topname};
2107                         $title =~ s/ /&nbsp;/g;
2108                         $title =~ s/^/&nbsp;/g;
2109                         $title =~ s/$/&nbsp;/g;
2110                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2111                 }
2112         } else {
2113                 $cloud = \%ctags_lc;
2114         }
2115         $cloud;
2116 }
2117
2118 sub git_show_project_tagcloud {
2119         my ($cloud, $count) = @_;
2120         print STDERR ref($cloud)."..\n";
2121         if (ref $cloud eq 'HTML::TagCloud') {
2122                 return $cloud->html_and_css($count);
2123         } else {
2124                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2125                 return '<p align="center">' . join (', ', map {
2126                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2127                 } splice(@tags, 0, $count)) . '</p>';
2128         }
2129 }
2130
2131 sub git_get_project_url_list {
2132         my $path = shift;
2133
2134         $git_dir = "$projectroot/$path";
2135         open my $fd, "$git_dir/cloneurl"
2136                 or return wantarray ?
2137                 @{ config_to_multi(git_get_project_config('url')) } :
2138                    config_to_multi(git_get_project_config('url'));
2139         my @git_project_url_list = map { chomp; $_ } <$fd>;
2140         close $fd;
2141
2142         return wantarray ? @git_project_url_list : \@git_project_url_list;
2143 }
2144
2145 sub git_get_projects_list {
2146         my ($filter) = @_;
2147         my @list;
2148
2149         $filter ||= '';
2150         $filter =~ s/\.git$//;
2151
2152         my $check_forks = gitweb_check_feature('forks');
2153
2154         if (-d $projects_list) {
2155                 # search in directory
2156                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2157                 # remove the trailing "/"
2158                 $dir =~ s!/+$!!;
2159                 my $pfxlen = length("$dir");
2160                 my $pfxdepth = ($dir =~ tr!/!!);
2161
2162                 File::Find::find({
2163                         follow_fast => 1, # follow symbolic links
2164                         follow_skip => 2, # ignore duplicates
2165                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2166                         wanted => sub {
2167                                 # skip project-list toplevel, if we get it.
2168                                 return if (m!^[/.]$!);
2169                                 # only directories can be git repositories
2170                                 return unless (-d $_);
2171                                 # don't traverse too deep (Find is super slow on os x)
2172                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2173                                         $File::Find::prune = 1;
2174                                         return;
2175                                 }
2176
2177                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2178                                 # we check related file in $projectroot
2179                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2180                                 if (check_export_ok("$projectroot/$path")) {
2181                                         push @list, { path => $path };
2182                                         $File::Find::prune = 1;
2183                                 }
2184                         },
2185                 }, "$dir");
2186
2187         } elsif (-f $projects_list) {
2188                 # read from file(url-encoded):
2189                 # 'git%2Fgit.git Linus+Torvalds'
2190                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2191                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2192                 my %paths;
2193                 open my ($fd), $projects_list or return;
2194         PROJECT:
2195                 while (my $line = <$fd>) {
2196                         chomp $line;
2197                         my ($path, $owner) = split ' ', $line;
2198                         $path = unescape($path);
2199                         $owner = unescape($owner);
2200                         if (!defined $path) {
2201                                 next;
2202                         }
2203                         if ($filter ne '') {
2204                                 # looking for forks;
2205                                 my $pfx = substr($path, 0, length($filter));
2206                                 if ($pfx ne $filter) {
2207                                         next PROJECT;
2208                                 }
2209                                 my $sfx = substr($path, length($filter));
2210                                 if ($sfx !~ /^\/.*\.git$/) {
2211                                         next PROJECT;
2212                                 }
2213                         } elsif ($check_forks) {
2214                         PATH:
2215                                 foreach my $filter (keys %paths) {
2216                                         # looking for forks;
2217                                         my $pfx = substr($path, 0, length($filter));
2218                                         if ($pfx ne $filter) {
2219                                                 next PATH;
2220                                         }
2221                                         my $sfx = substr($path, length($filter));
2222                                         if ($sfx !~ /^\/.*\.git$/) {
2223                                                 next PATH;
2224                                         }
2225                                         # is a fork, don't include it in
2226                                         # the list
2227                                         next PROJECT;
2228                                 }
2229                         }
2230                         if (check_export_ok("$projectroot/$path")) {
2231                                 my $pr = {
2232                                         path => $path,
2233                                         owner => to_utf8($owner),
2234                                 };
2235                                 push @list, $pr;
2236                                 (my $forks_path = $path) =~ s/\.git$//;
2237                                 $paths{$forks_path}++;
2238                         }
2239                 }
2240                 close $fd;
2241         }
2242         return @list;
2243 }
2244
2245 our $gitweb_project_owner = undef;
2246 sub git_get_project_list_from_file {
2247
2248         return if (defined $gitweb_project_owner);
2249
2250         $gitweb_project_owner = {};
2251         # read from file (url-encoded):
2252         # 'git%2Fgit.git Linus+Torvalds'
2253         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2254         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2255         if (-f $projects_list) {
2256                 open (my $fd , $projects_list);
2257                 while (my $line = <$fd>) {
2258                         chomp $line;
2259                         my ($pr, $ow) = split ' ', $line;
2260                         $pr = unescape($pr);
2261                         $ow = unescape($ow);
2262                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2263                 }
2264                 close $fd;
2265         }
2266 }
2267
2268 sub git_get_project_owner {
2269         my $project = shift;
2270         my $owner;
2271
2272         return undef unless $project;
2273         $git_dir = "$projectroot/$project";
2274
2275         if (!defined $gitweb_project_owner) {
2276                 git_get_project_list_from_file();
2277         }
2278
2279         if (exists $gitweb_project_owner->{$project}) {
2280                 $owner = $gitweb_project_owner->{$project};
2281         }
2282         if (!defined $owner){
2283                 $owner = git_get_project_config('owner');
2284         }
2285         if (!defined $owner) {
2286                 $owner = get_file_owner("$git_dir");
2287         }
2288
2289         return $owner;
2290 }
2291
2292 sub git_get_last_activity {
2293         my ($path) = @_;
2294         my $fd;
2295
2296         $git_dir = "$projectroot/$path";
2297         open($fd, "-|", git_cmd(), 'for-each-ref',
2298              '--format=%(committer)',
2299              '--sort=-committerdate',
2300              '--count=1',
2301              'refs/heads') or return;
2302         my $most_recent = <$fd>;
2303         close $fd or return;
2304         if (defined $most_recent &&
2305             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2306                 my $timestamp = $1;
2307                 my $age = time - $timestamp;
2308                 return ($age, age_string($age));
2309         }
2310         return (undef, undef);
2311 }
2312
2313 sub git_get_references {
2314         my $type = shift || "";
2315         my %refs;
2316         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2317         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2318         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2319                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2320                 or return;
2321
2322         while (my $line = <$fd>) {
2323                 chomp $line;
2324                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2325                         if (defined $refs{$1}) {
2326                                 push @{$refs{$1}}, $2;
2327                         } else {
2328                                 $refs{$1} = [ $2 ];
2329                         }
2330                 }
2331         }
2332         close $fd or return;
2333         return \%refs;
2334 }
2335
2336 sub git_get_rev_name_tags {
2337         my $hash = shift || return undef;
2338
2339         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2340                 or return;
2341         my $name_rev = <$fd>;
2342         close $fd;
2343
2344         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2345                 return $1;
2346         } else {
2347                 # catches also '$hash undefined' output
2348                 return undef;
2349         }
2350 }
2351
2352 ## ----------------------------------------------------------------------
2353 ## parse to hash functions
2354
2355 sub parse_date {
2356         my $epoch = shift;
2357         my $tz = shift || "-0000";
2358
2359         my %date;
2360         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2361         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2362         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2363         $date{'hour'} = $hour;
2364         $date{'minute'} = $min;
2365         $date{'mday'} = $mday;
2366         $date{'day'} = $days[$wday];
2367         $date{'month'} = $months[$mon];
2368         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2369                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2370         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2371                              $mday, $months[$mon], $hour ,$min;
2372         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2373                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2374
2375         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2376         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2377         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2378         $date{'hour_local'} = $hour;
2379         $date{'minute_local'} = $min;
2380         $date{'tz_local'} = $tz;
2381         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2382                                   1900+$year, $mon+1, $mday,
2383                                   $hour, $min, $sec, $tz);
2384         return %date;
2385 }
2386
2387 sub parse_tag {
2388         my $tag_id = shift;
2389         my %tag;
2390         my @comment;
2391
2392         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2393         $tag{'id'} = $tag_id;
2394         while (my $line = <$fd>) {
2395                 chomp $line;
2396                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2397                         $tag{'object'} = $1;
2398                 } elsif ($line =~ m/^type (.+)$/) {
2399                         $tag{'type'} = $1;
2400                 } elsif ($line =~ m/^tag (.+)$/) {
2401                         $tag{'name'} = $1;
2402                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2403                         $tag{'author'} = $1;
2404                         $tag{'epoch'} = $2;
2405                         $tag{'tz'} = $3;
2406                 } elsif ($line =~ m/--BEGIN/) {
2407                         push @comment, $line;
2408                         last;
2409                 } elsif ($line eq "") {
2410                         last;
2411                 }
2412         }
2413         push @comment, <$fd>;
2414         $tag{'comment'} = \@comment;
2415         close $fd or return;
2416         if (!defined $tag{'name'}) {
2417                 return
2418         };
2419         return %tag
2420 }
2421
2422 sub parse_commit_text {
2423         my ($commit_text, $withparents) = @_;
2424         my @commit_lines = split '\n', $commit_text;
2425         my %co;
2426
2427         pop @commit_lines; # Remove '\0'
2428
2429         if (! @commit_lines) {
2430                 return;
2431         }
2432
2433         my $header = shift @commit_lines;
2434         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2435                 return;
2436         }
2437         ($co{'id'}, my @parents) = split ' ', $header;
2438         while (my $line = shift @commit_lines) {
2439                 last if $line eq "\n";
2440                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2441                         $co{'tree'} = $1;
2442                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2443                         push @parents, $1;
2444                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2445                         $co{'author'} = $1;
2446                         $co{'author_epoch'} = $2;
2447                         $co{'author_tz'} = $3;
2448                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2449                                 $co{'author_name'}  = $1;
2450                                 $co{'author_email'} = $2;
2451                         } else {
2452                                 $co{'author_name'} = $co{'author'};
2453                         }
2454                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2455                         $co{'committer'} = $1;
2456                         $co{'committer_epoch'} = $2;
2457                         $co{'committer_tz'} = $3;
2458                         $co{'committer_name'} = $co{'committer'};
2459                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2460                                 $co{'committer_name'}  = $1;
2461                                 $co{'committer_email'} = $2;
2462                         } else {
2463                                 $co{'committer_name'} = $co{'committer'};
2464                         }
2465                 }
2466         }
2467         if (!defined $co{'tree'}) {
2468                 return;
2469         };
2470         $co{'parents'} = \@parents;
2471         $co{'parent'} = $parents[0];
2472
2473         foreach my $title (@commit_lines) {
2474                 $title =~ s/^    //;
2475                 if ($title ne "") {
2476                         $co{'title'} = chop_str($title, 80, 5);
2477                         # remove leading stuff of merges to make the interesting part visible
2478                         if (length($title) > 50) {
2479                                 $title =~ s/^Automatic //;
2480                                 $title =~ s/^merge (of|with) /Merge ... /i;
2481                                 if (length($title) > 50) {
2482                                         $title =~ s/(http|rsync):\/\///;
2483                                 }
2484                                 if (length($title) > 50) {
2485                                         $title =~ s/(master|www|rsync)\.//;
2486                                 }
2487                                 if (length($title) > 50) {
2488                                         $title =~ s/kernel.org:?//;
2489                                 }
2490                                 if (length($title) > 50) {
2491                                         $title =~ s/\/pub\/scm//;
2492                                 }
2493                         }
2494                         $co{'title_short'} = chop_str($title, 50, 5);
2495                         last;
2496                 }
2497         }
2498         if (! defined $co{'title'} || $co{'title'} eq "") {
2499                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2500         }
2501         # remove added spaces
2502         foreach my $line (@commit_lines) {
2503                 $line =~ s/^    //;
2504         }
2505         $co{'comment'} = \@commit_lines;
2506
2507         my $age = time - $co{'committer_epoch'};
2508         $co{'age'} = $age;
2509         $co{'age_string'} = age_string($age);
2510         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2511         if ($age > 60*60*24*7*2) {
2512                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2513                 $co{'age_string_age'} = $co{'age_string'};
2514         } else {
2515                 $co{'age_string_date'} = $co{'age_string'};
2516                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2517         }
2518         return %co;
2519 }
2520
2521 sub parse_commit {
2522         my ($commit_id) = @_;
2523         my %co;
2524
2525         local $/ = "\0";
2526
2527         open my $fd, "-|", git_cmd(), "rev-list",
2528                 "--parents",
2529                 "--header",
2530                 "--max-count=1",
2531                 $commit_id,
2532                 "--",
2533                 or die_error(500, "Open git-rev-list failed");
2534         %co = parse_commit_text(<$fd>, 1);
2535         close $fd;
2536
2537         return %co;
2538 }
2539
2540 sub parse_commits {
2541         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2542         my @cos;
2543
2544         $maxcount ||= 1;
2545         $skip ||= 0;
2546
2547         local $/ = "\0";
2548
2549         open my $fd, "-|", git_cmd(), "rev-list",
2550                 "--header",
2551                 @args,
2552                 ("--max-count=" . $maxcount),
2553                 ("--skip=" . $skip),
2554                 @extra_options,
2555                 $commit_id,
2556                 "--",
2557                 ($filename ? ($filename) : ())
2558                 or die_error(500, "Open git-rev-list failed");
2559         while (my $line = <$fd>) {
2560                 my %co = parse_commit_text($line);
2561                 push @cos, \%co;
2562         }
2563         close $fd;
2564
2565         return wantarray ? @cos : \@cos;
2566 }
2567
2568 # parse line of git-diff-tree "raw" output
2569 sub parse_difftree_raw_line {
2570         my $line = shift;
2571         my %res;
2572
2573         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2574         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2575         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2576                 $res{'from_mode'} = $1;
2577                 $res{'to_mode'} = $2;
2578                 $res{'from_id'} = $3;
2579                 $res{'to_id'} = $4;
2580                 $res{'status'} = $5;
2581                 $res{'similarity'} = $6;
2582                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2583                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2584                 } else {
2585                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2586                 }
2587         }
2588         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2589         # combined diff (for merge commit)
2590         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2591                 $res{'nparents'}  = length($1);
2592                 $res{'from_mode'} = [ split(' ', $2) ];
2593                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2594                 $res{'from_id'} = [ split(' ', $3) ];
2595                 $res{'to_id'} = pop @{$res{'from_id'}};
2596                 $res{'status'} = [ split('', $4) ];
2597                 $res{'to_file'} = unquote($5);
2598         }
2599         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2600         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2601                 $res{'commit'} = $1;
2602         }
2603
2604         return wantarray ? %res : \%res;
2605 }
2606
2607 # wrapper: return parsed line of git-diff-tree "raw" output
2608 # (the argument might be raw line, or parsed info)
2609 sub parsed_difftree_line {
2610         my $line_or_ref = shift;
2611
2612         if (ref($line_or_ref) eq "HASH") {
2613                 # pre-parsed (or generated by hand)
2614                 return $line_or_ref;
2615         } else {
2616                 return parse_difftree_raw_line($line_or_ref);
2617         }
2618 }
2619
2620 # parse line of git-ls-tree output
2621 sub parse_ls_tree_line ($;%) {
2622         my $line = shift;
2623         my %opts = @_;
2624         my %res;
2625
2626         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2627         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2628
2629         $res{'mode'} = $1;
2630         $res{'type'} = $2;
2631         $res{'hash'} = $3;
2632         if ($opts{'-z'}) {
2633                 $res{'name'} = $4;
2634         } else {
2635                 $res{'name'} = unquote($4);
2636         }
2637
2638         return wantarray ? %res : \%res;
2639 }
2640
2641 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2642 sub parse_from_to_diffinfo {
2643         my ($diffinfo, $from, $to, @parents) = @_;
2644
2645         if ($diffinfo->{'nparents'}) {
2646                 # combined diff
2647                 $from->{'file'} = [];
2648                 $from->{'href'} = [];
2649                 fill_from_file_info($diffinfo, @parents)
2650                         unless exists $diffinfo->{'from_file'};
2651                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2652                         $from->{'file'}[$i] =
2653                                 defined $diffinfo->{'from_file'}[$i] ?
2654                                         $diffinfo->{'from_file'}[$i] :
2655                                         $diffinfo->{'to_file'};
2656                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2657                                 $from->{'href'}[$i] = href(action=>"blob",
2658                                                            hash_base=>$parents[$i],
2659                                                            hash=>$diffinfo->{'from_id'}[$i],
2660                                                            file_name=>$from->{'file'}[$i]);
2661                         } else {
2662                                 $from->{'href'}[$i] = undef;
2663                         }
2664                 }
2665         } else {
2666                 # ordinary (not combined) diff
2667                 $from->{'file'} = $diffinfo->{'from_file'};
2668                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2669                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2670                                                hash=>$diffinfo->{'from_id'},
2671                                                file_name=>$from->{'file'});
2672                 } else {
2673                         delete $from->{'href'};
2674                 }
2675         }
2676
2677         $to->{'file'} = $diffinfo->{'to_file'};
2678         if (!is_deleted($diffinfo)) { # file exists in result
2679                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2680                                      hash=>$diffinfo->{'to_id'},
2681                                      file_name=>$to->{'file'});
2682         } else {
2683                 delete $to->{'href'};
2684         }
2685 }
2686
2687 ## ......................................................................
2688 ## parse to array of hashes functions
2689
2690 sub git_get_heads_list {
2691         my $limit = shift;
2692         my @headslist;
2693
2694         open my $fd, '-|', git_cmd(), 'for-each-ref',
2695                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2696                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2697                 'refs/heads'
2698                 or return;
2699         while (my $line = <$fd>) {
2700                 my %ref_item;
2701
2702                 chomp $line;
2703                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2704                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2705                 my ($committer, $epoch, $tz) =
2706                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2707                 $ref_item{'fullname'}  = $name;
2708                 $name =~ s!^refs/heads/!!;
2709
2710                 $ref_item{'name'}  = $name;
2711                 $ref_item{'id'}    = $hash;
2712                 $ref_item{'title'} = $title || '(no commit message)';
2713                 $ref_item{'epoch'} = $epoch;
2714                 if ($epoch) {
2715                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2716                 } else {
2717                         $ref_item{'age'} = "unknown";
2718                 }
2719
2720                 push @headslist, \%ref_item;
2721         }
2722         close $fd;
2723
2724         return wantarray ? @headslist : \@headslist;
2725 }
2726
2727 sub git_get_tags_list {
2728         my $limit = shift;
2729         my @tagslist;
2730
2731         open my $fd, '-|', git_cmd(), 'for-each-ref',
2732                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2733                 '--format=%(objectname) %(objecttype) %(refname) '.
2734                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2735                 'refs/tags'
2736                 or return;
2737         while (my $line = <$fd>) {
2738                 my %ref_item;
2739
2740                 chomp $line;
2741                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2742                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2743                 my ($creator, $epoch, $tz) =
2744                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2745                 $ref_item{'fullname'} = $name;
2746                 $name =~ s!^refs/tags/!!;
2747
2748                 $ref_item{'type'} = $type;
2749                 $ref_item{'id'} = $id;
2750                 $ref_item{'name'} = $name;
2751                 if ($type eq "tag") {
2752                         $ref_item{'subject'} = $title;
2753                         $ref_item{'reftype'} = $reftype;
2754                         $ref_item{'refid'}   = $refid;
2755                 } else {
2756                         $ref_item{'reftype'} = $type;
2757                         $ref_item{'refid'}   = $id;
2758                 }
2759
2760                 if ($type eq "tag" || $type eq "commit") {
2761                         $ref_item{'epoch'} = $epoch;
2762                         if ($epoch) {
2763                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2764                         } else {
2765                                 $ref_item{'age'} = "unknown";
2766                         }
2767                 }
2768
2769                 push @tagslist, \%ref_item;
2770         }
2771         close $fd;
2772
2773         return wantarray ? @tagslist : \@tagslist;
2774 }
2775
2776 ## ----------------------------------------------------------------------
2777 ## filesystem-related functions
2778
2779 sub get_file_owner {
2780         my $path = shift;
2781
2782         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2783         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2784         if (!defined $gcos) {
2785                 return undef;
2786         }
2787         my $owner = $gcos;
2788         $owner =~ s/[,;].*$//;
2789         return to_utf8($owner);
2790 }
2791
2792 # assume that file exists
2793 sub insert_file {
2794         my $filename = shift;
2795
2796         open my $fd, '<', $filename;
2797         print map { to_utf8($_) } <$fd>;
2798         close $fd;
2799 }
2800
2801 ## ......................................................................
2802 ## mimetype related functions
2803
2804 sub mimetype_guess_file {
2805         my $filename = shift;
2806         my $mimemap = shift;
2807         -r $mimemap or return undef;
2808
2809         my %mimemap;
2810         open(MIME, $mimemap) or return undef;
2811         while (<MIME>) {
2812                 next if m/^#/; # skip comments
2813                 my ($mime, $exts) = split(/\t+/);
2814                 if (defined $exts) {
2815                         my @exts = split(/\s+/, $exts);
2816                         foreach my $ext (@exts) {
2817                                 $mimemap{$ext} = $mime;
2818                         }
2819                 }
2820         }
2821         close(MIME);
2822
2823         $filename =~ /\.([^.]*)$/;
2824         return $mimemap{$1};
2825 }
2826
2827 sub mimetype_guess {
2828         my $filename = shift;
2829         my $mime;
2830         $filename =~ /\./ or return undef;
2831
2832         if ($mimetypes_file) {
2833                 my $file = $mimetypes_file;
2834                 if ($file !~ m!^/!) { # if it is relative path
2835                         # it is relative to project
2836                         $file = "$projectroot/$project/$file";
2837                 }
2838                 $mime = mimetype_guess_file($filename, $file);
2839         }
2840         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2841         return $mime;
2842 }
2843
2844 sub blob_mimetype {
2845         my $fd = shift;
2846         my $filename = shift;
2847
2848         if ($filename) {
2849                 my $mime = mimetype_guess($filename);
2850                 $mime and return $mime;
2851         }
2852
2853         # just in case
2854         return $default_blob_plain_mimetype unless $fd;
2855
2856         if (-T $fd) {
2857                 return 'text/plain';
2858         } elsif (! $filename) {
2859                 return 'application/octet-stream';
2860         } elsif ($filename =~ m/\.png$/i) {
2861                 return 'image/png';
2862         } elsif ($filename =~ m/\.gif$/i) {
2863                 return 'image/gif';
2864         } elsif ($filename =~ m/\.jpe?g$/i) {
2865                 return 'image/jpeg';
2866         } else {
2867                 return 'application/octet-stream';
2868         }
2869 }
2870
2871 sub blob_contenttype {
2872         my ($fd, $file_name, $type) = @_;
2873
2874         $type ||= blob_mimetype($fd, $file_name);
2875         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2876                 $type .= "; charset=$default_text_plain_charset";
2877         }
2878
2879         return $type;
2880 }
2881
2882 ## ======================================================================
2883 ## functions printing HTML: header, footer, error page
2884
2885 sub git_header_html {
2886         my $status = shift || "200 OK";
2887         my $expires = shift;
2888
2889         my $title = "$site_name";
2890         if (defined $project) {
2891                 $title .= " - " . to_utf8($project);
2892                 if (defined $action) {
2893                         $title .= "/$action";
2894                         if (defined $file_name) {
2895                                 $title .= " - " . esc_path($file_name);
2896                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2897                                         $title .= "/";
2898                                 }
2899                         }
2900                 }
2901         }
2902         my $content_type;
2903         # require explicit support from the UA if we are to send the page as
2904         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2905         # we have to do this because MSIE sometimes globs '*/*', pretending to
2906         # support xhtml+xml but choking when it gets what it asked for.
2907         if (defined $cgi->http('HTTP_ACCEPT') &&
2908             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2909             $cgi->Accept('application/xhtml+xml') != 0) {
2910                 $content_type = 'application/xhtml+xml';
2911         } else {
2912                 $content_type = 'text/html';
2913         }
2914         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2915                            -status=> $status, -expires => $expires);
2916         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2917         print <<EOF;
2918 <?xml version="1.0" encoding="utf-8"?>
2919 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2920 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2921 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2922 <!-- git core binaries version $git_version -->
2923 <head>
2924 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2925 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2926 <meta name="robots" content="index, nofollow"/>
2927 <title>$title</title>
2928 EOF
2929         # the stylesheet, favicon etc urls won't work correctly with path_info
2930         # unless we set the appropriate base URL
2931         if ($ENV{'PATH_INFO'}) {
2932                 print "<base href=\"".esc_url($base_url)."\" />\n";
2933         }
2934         # print out each stylesheet that exist, providing backwards capability
2935         # for those people who defined $stylesheet in a config file
2936         if (defined $stylesheet) {
2937                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2938         } else {
2939                 foreach my $stylesheet (@stylesheets) {
2940                         next unless $stylesheet;
2941                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2942                 }
2943         }
2944         if (defined $project) {
2945                 my %href_params = get_feed_info();
2946                 if (!exists $href_params{'-title'}) {
2947                         $href_params{'-title'} = 'log';
2948                 }
2949
2950                 foreach my $format qw(RSS Atom) {
2951                         my $type = lc($format);
2952                         my %link_attr = (
2953                                 '-rel' => 'alternate',
2954                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2955                                 '-type' => "application/$type+xml"
2956                         );
2957
2958                         $href_params{'action'} = $type;
2959                         $link_attr{'-href'} = href(%href_params);
2960                         print "<link ".
2961                               "rel=\"$link_attr{'-rel'}\" ".
2962                               "title=\"$link_attr{'-title'}\" ".
2963                               "href=\"$link_attr{'-href'}\" ".
2964                               "type=\"$link_attr{'-type'}\" ".
2965                               "/>\n";
2966
2967                         $href_params{'extra_options'} = '--no-merges';
2968                         $link_attr{'-href'} = href(%href_params);
2969                         $link_attr{'-title'} .= ' (no merges)';
2970                         print "<link ".
2971                               "rel=\"$link_attr{'-rel'}\" ".
2972                               "title=\"$link_attr{'-title'}\" ".
2973                               "href=\"$link_attr{'-href'}\" ".
2974                               "type=\"$link_attr{'-type'}\" ".
2975                               "/>\n";
2976                 }
2977
2978         } else {
2979                 printf('<link rel="alternate" title="%s projects list" '.
2980                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2981                        $site_name, href(project=>undef, action=>"project_index"));
2982                 printf('<link rel="alternate" title="%s projects feeds" '.
2983                        'href="%s" type="text/x-opml" />'."\n",
2984                        $site_name, href(project=>undef, action=>"opml"));
2985         }
2986         if (defined $favicon) {
2987                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2988         }
2989
2990         print "</head>\n" .
2991               "<body>\n";
2992
2993         if (-f $site_header) {
2994                 insert_file($site_header);
2995         }
2996
2997         print "<div class=\"page_header\">\n" .
2998               $cgi->a({-href => esc_url($logo_url),
2999                        -title => $logo_label},
3000                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3001         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3002         if (defined $project) {
3003                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3004                 if (defined $action) {
3005                         print " / $action";
3006                 }
3007                 print "\n";
3008         }
3009         print "</div>\n";
3010
3011         my $have_search = gitweb_check_feature('search');
3012         if (defined $project && $have_search) {
3013                 if (!defined $searchtext) {
3014                         $searchtext = "";
3015                 }
3016                 my $search_hash;
3017                 if (defined $hash_base) {
3018                         $search_hash = $hash_base;
3019                 } elsif (defined $hash) {
3020                         $search_hash = $hash;
3021                 } else {
3022                         $search_hash = "HEAD";
3023                 }
3024                 my $action = $my_uri;
3025                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3026                 if ($use_pathinfo) {
3027                         $action .= "/".esc_url($project);
3028                 }
3029                 print $cgi->startform(-method => "get", -action => $action) .
3030                       "<div class=\"search\">\n" .
3031                       (!$use_pathinfo &&
3032                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3033                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3034                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3035                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3036                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3037                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3038                       " search:\n",
3039                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3040                       "<span title=\"Extended regular expression\">" .
3041                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3042                                      -checked => $search_use_regexp) .
3043                       "</span>" .
3044                       "</div>" .
3045                       $cgi->end_form() . "\n";
3046         }
3047 }
3048
3049 sub git_footer_html {
3050         my $feed_class = 'rss_logo';
3051
3052         print "<div class=\"page_footer\">\n";
3053         if (defined $project) {
3054                 my $descr = git_get_project_description($project);
3055                 if (defined $descr) {
3056                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3057                 }
3058
3059                 my %href_params = get_feed_info();
3060                 if (!%href_params) {
3061                         $feed_class .= ' generic';
3062                 }
3063                 $href_params{'-title'} ||= 'log';
3064
3065                 foreach my $format qw(RSS Atom) {
3066                         $href_params{'action'} = lc($format);
3067                         print $cgi->a({-href => href(%href_params),
3068                                       -title => "$href_params{'-title'} $format feed",
3069                                       -class => $feed_class}, $format)."\n";
3070                 }
3071
3072         } else {
3073                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3074                               -class => $feed_class}, "OPML") . " ";
3075                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3076                               -class => $feed_class}, "TXT") . "\n";
3077         }
3078         print "</div>\n"; # class="page_footer"
3079
3080         if (-f $site_footer) {
3081                 insert_file($site_footer);
3082         }
3083
3084         print "</body>\n" .
3085               "</html>";
3086 }
3087
3088 # die_error(<http_status_code>, <error_message>)
3089 # Example: die_error(404, 'Hash not found')
3090 # By convention, use the following status codes (as defined in RFC 2616):
3091 # 400: Invalid or missing CGI parameters, or
3092 #      requested object exists but has wrong type.
3093 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3094 #      this server or project.
3095 # 404: Requested object/revision/project doesn't exist.
3096 # 500: The server isn't configured properly, or
3097 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3098 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3099 sub die_error {
3100         my $status = shift || 500;
3101         my $error = shift || "Internal server error";
3102
3103         my %http_responses = (400 => '400 Bad Request',
3104                               403 => '403 Forbidden',
3105                               404 => '404 Not Found',
3106                               500 => '500 Internal Server Error');
3107         git_header_html($http_responses{$status});
3108         print <<EOF;
3109 <div class="page_body">
3110 <br /><br />
3111 $status - $error
3112 <br />
3113 </div>
3114 EOF
3115         git_footer_html();
3116         exit;
3117 }
3118
3119 ## ----------------------------------------------------------------------
3120 ## functions printing or outputting HTML: navigation
3121
3122 sub git_print_page_nav {
3123         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3124         $extra = '' if !defined $extra; # pager or formats
3125
3126         my @navs = qw(summary shortlog log commit commitdiff tree);
3127         if ($suppress) {
3128                 @navs = grep { $_ ne $suppress } @navs;
3129         }
3130
3131         my %arg = map { $_ => {action=>$_} } @navs;
3132         if (defined $head) {
3133                 for (qw(commit commitdiff)) {
3134                         $arg{$_}{'hash'} = $head;
3135                 }
3136                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3137                         for (qw(shortlog log)) {
3138                                 $arg{$_}{'hash'} = $head;
3139                         }
3140                 }
3141         }
3142
3143         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3144         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3145
3146         my @actions = gitweb_get_feature('actions');
3147         my %repl = (
3148                 '%' => '%',
3149                 'n' => $project,         # project name
3150                 'f' => $git_dir,         # project path within filesystem
3151                 'h' => $treehead || '',  # current hash ('h' parameter)
3152                 'b' => $treebase || '',  # hash base ('hb' parameter)
3153         );
3154         while (@actions) {
3155                 my ($label, $link, $pos) = splice(@actions,0,3);
3156                 # insert
3157                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3158                 # munch munch
3159                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3160                 $arg{$label}{'_href'} = $link;
3161         }
3162
3163         print "<div class=\"page_nav\">\n" .
3164                 (join " | ",
3165                  map { $_ eq $current ?
3166                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3167                  } @navs);
3168         print "<br/>\n$extra<br/>\n" .
3169               "</div>\n";
3170 }
3171
3172 sub format_paging_nav {
3173         my ($action, $hash, $head, $page, $has_next_link) = @_;
3174         my $paging_nav;
3175
3176
3177         if ($hash ne $head || $page) {
3178                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3179         } else {
3180                 $paging_nav .= "HEAD";
3181         }
3182
3183         if ($page > 0) {
3184                 $paging_nav .= " &sdot; " .
3185                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3186                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3187         } else {
3188                 $paging_nav .= " &sdot; prev";
3189         }
3190
3191         if ($has_next_link) {
3192                 $paging_nav .= " &sdot; " .
3193                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3194                                  -accesskey => "n", -title => "Alt-n"}, "next");
3195         } else {
3196                 $paging_nav .= " &sdot; next";
3197         }
3198
3199         return $paging_nav;
3200 }
3201
3202 ## ......................................................................
3203 ## functions printing or outputting HTML: div
3204
3205 sub git_print_header_div {
3206         my ($action, $title, $hash, $hash_base) = @_;
3207         my %args = ();
3208
3209         $args{'action'} = $action;
3210         $args{'hash'} = $hash if $hash;
3211         $args{'hash_base'} = $hash_base if $hash_base;
3212
3213         print "<div class=\"header\">\n" .
3214               $cgi->a({-href => href(%args), -class => "title"},
3215               $title ? $title : $action) .
3216               "\n</div>\n";
3217 }
3218
3219 #sub git_print_authorship (\%) {
3220 sub git_print_authorship {
3221         my $co = shift;
3222
3223         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3224         print "<div class=\"author_date\">" .
3225               esc_html($co->{'author_name'}) .
3226               " [$ad{'rfc2822'}";
3227         if ($ad{'hour_local'} < 6) {
3228                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3229                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3230         } else {
3231                 printf(" (%02d:%02d %s)",
3232                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3233         }
3234         print "]</div>\n";
3235 }
3236
3237 sub git_print_page_path {
3238         my $name = shift;
3239         my $type = shift;
3240         my $hb = shift;
3241
3242
3243         print "<div class=\"page_path\">";
3244         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3245                       -title => 'tree root'}, to_utf8("[$project]"));
3246         print " / ";
3247         if (defined $name) {
3248                 my @dirname = split '/', $name;
3249                 my $basename = pop @dirname;
3250                 my $fullname = '';
3251
3252                 foreach my $dir (@dirname) {
3253                         $fullname .= ($fullname ? '/' : '') . $dir;
3254                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3255                                                      hash_base=>$hb),
3256                                       -title => $fullname}, esc_path($dir));
3257                         print " / ";
3258                 }
3259                 if (defined $type && $type eq 'blob') {
3260                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                 } elsif (defined $type && $type eq 'tree') {
3264                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3265                                                      hash_base=>$hb),
3266                                       -title => $name}, esc_path($basename));
3267                         print " / ";
3268                 } else {
3269                         print esc_path($basename);
3270                 }
3271         }
3272         print "<br/></div>\n";
3273 }
3274
3275 # sub git_print_log (\@;%) {
3276 sub git_print_log ($;%) {
3277         my $log = shift;
3278         my %opts = @_;
3279
3280         if ($opts{'-remove_title'}) {
3281                 # remove title, i.e. first line of log
3282                 shift @$log;
3283         }
3284         # remove leading empty lines
3285         while (defined $log->[0] && $log->[0] eq "") {
3286                 shift @$log;
3287         }
3288
3289         # print log
3290         my $signoff = 0;
3291         my $empty = 0;
3292         foreach my $line (@$log) {
3293                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3294                         $signoff = 1;
3295                         $empty = 0;
3296                         if (! $opts{'-remove_signoff'}) {
3297                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3298                                 next;
3299                         } else {
3300                                 # remove signoff lines
3301                                 next;
3302                         }
3303                 } else {
3304                         $signoff = 0;
3305                 }
3306
3307                 # print only one empty line
3308                 # do not print empty line after signoff
3309                 if ($line eq "") {
3310                         next if ($empty || $signoff);
3311                         $empty = 1;
3312                 } else {
3313                         $empty = 0;
3314                 }
3315
3316                 print format_log_line_html($line) . "<br/>\n";
3317         }
3318
3319         if ($opts{'-final_empty_line'}) {
3320                 # end with single empty line
3321                 print "<br/>\n" unless $empty;
3322         }
3323 }
3324
3325 # return link target (what link points to)
3326 sub git_get_link_target {
3327         my $hash = shift;
3328         my $link_target;
3329
3330         # read link
3331         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3332                 or return;
3333         {
3334                 local $/;
3335                 $link_target = <$fd>;
3336         }
3337         close $fd
3338                 or return;
3339
3340         return $link_target;
3341 }
3342
3343 # given link target, and the directory (basedir) the link is in,
3344 # return target of link relative to top directory (top tree);
3345 # return undef if it is not possible (including absolute links).
3346 sub normalize_link_target {
3347         my ($link_target, $basedir, $hash_base) = @_;
3348
3349         # we can normalize symlink target only if $hash_base is provided
3350         return unless $hash_base;
3351
3352         # absolute symlinks (beginning with '/') cannot be normalized
3353         return if (substr($link_target, 0, 1) eq '/');
3354
3355         # normalize link target to path from top (root) tree (dir)
3356         my $path;
3357         if ($basedir) {
3358                 $path = $basedir . '/' . $link_target;
3359         } else {
3360                 # we are in top (root) tree (dir)
3361                 $path = $link_target;
3362         }
3363
3364         # remove //, /./, and /../
3365         my @path_parts;
3366         foreach my $part (split('/', $path)) {
3367                 # discard '.' and ''
3368                 next if (!$part || $part eq '.');
3369                 # handle '..'
3370                 if ($part eq '..') {
3371                         if (@path_parts) {
3372                                 pop @path_parts;
3373                         } else {
3374                                 # link leads outside repository (outside top dir)
3375                                 return;
3376                         }
3377                 } else {
3378                         push @path_parts, $part;
3379                 }
3380         }
3381         $path = join('/', @path_parts);
3382
3383         return $path;
3384 }
3385
3386 # print tree entry (row of git_tree), but without encompassing <tr> element
3387 sub git_print_tree_entry {
3388         my ($t, $basedir, $hash_base, $have_blame) = @_;
3389
3390         my %base_key = ();
3391         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3392
3393         # The format of a table row is: mode list link.  Where mode is
3394         # the mode of the entry, list is the name of the entry, an href,
3395         # and link is the action links of the entry.
3396
3397         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3398         if ($t->{'type'} eq "blob") {
3399                 print "<td class=\"list\">" .
3400                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3401                                                file_name=>"$basedir$t->{'name'}", %base_key),
3402                                 -class => "list"}, esc_path($t->{'name'}));
3403                 if (S_ISLNK(oct $t->{'mode'})) {
3404                         my $link_target = git_get_link_target($t->{'hash'});
3405                         if ($link_target) {
3406                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3407                                 if (defined $norm_target) {
3408                                         print " -> " .
3409                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3410                                                                      file_name=>$norm_target),
3411                                                        -title => $norm_target}, esc_path($link_target));
3412                                 } else {
3413                                         print " -> " . esc_path($link_target);
3414                                 }
3415                         }
3416                 }
3417                 print "</td>\n";
3418                 print "<td class=\"link\">";
3419                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3420                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3421                               "blob");
3422                 if ($have_blame) {
3423                         print " | " .
3424                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3425                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3426                                       "blame");
3427                 }
3428                 if (defined $hash_base) {
3429                         print " | " .
3430                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3431                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3432                                       "history");
3433                 }
3434                 print " | " .
3435                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3436                                                file_name=>"$basedir$t->{'name'}")},
3437                                 "raw");
3438                 print "</td>\n";
3439
3440         } elsif ($t->{'type'} eq "tree") {
3441                 print "<td class=\"list\">";
3442                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3443                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3444                               esc_path($t->{'name'}));
3445                 print "</td>\n";
3446                 print "<td class=\"link\">";
3447                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3448                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3449                               "tree");
3450                 if (defined $hash_base) {
3451                         print " | " .
3452                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3453                                                      file_name=>"$basedir$t->{'name'}")},
3454                                       "history");
3455                 }
3456                 print "</td>\n";
3457         } else {
3458                 # unknown object: we can only present history for it
3459                 # (this includes 'commit' object, i.e. submodule support)
3460                 print "<td class=\"list\">" .
3461                       esc_path($t->{'name'}) .
3462                       "</td>\n";
3463                 print "<td class=\"link\">";
3464                 if (defined $hash_base) {
3465                         print $cgi->a({-href => href(action=>"history",
3466                                                      hash_base=>$hash_base,
3467                                                      file_name=>"$basedir$t->{'name'}")},
3468                                       "history");
3469                 }
3470                 print "</td>\n";
3471         }
3472 }
3473
3474 ## ......................................................................
3475 ## functions printing large fragments of HTML
3476
3477 # get pre-image filenames for merge (combined) diff
3478 sub fill_from_file_info {
3479         my ($diff, @parents) = @_;
3480
3481         $diff->{'from_file'} = [ ];
3482         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3483         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3484                 if ($diff->{'status'}[$i] eq 'R' ||
3485                     $diff->{'status'}[$i] eq 'C') {
3486                         $diff->{'from_file'}[$i] =
3487                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3488                 }
3489         }
3490
3491         return $diff;
3492 }
3493
3494 # is current raw difftree line of file deletion
3495 sub is_deleted {
3496         my $diffinfo = shift;
3497
3498         return $diffinfo->{'to_id'} eq ('0' x 40);
3499 }
3500
3501 # does patch correspond to [previous] difftree raw line
3502 # $diffinfo  - hashref of parsed raw diff format
3503 # $patchinfo - hashref of parsed patch diff format
3504 #              (the same keys as in $diffinfo)
3505 sub is_patch_split {
3506         my ($diffinfo, $patchinfo) = @_;
3507
3508         return defined $diffinfo && defined $patchinfo
3509                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3510 }
3511
3512
3513 sub git_difftree_body {
3514         my ($difftree, $hash, @parents) = @_;
3515         my ($parent) = $parents[0];
3516         my $have_blame = gitweb_check_feature('blame');
3517         print "<div class=\"list_head\">\n";
3518         if ($#{$difftree} > 10) {
3519                 print(($#{$difftree} + 1) . " files changed:\n");
3520         }
3521         print "</div>\n";
3522
3523         print "<table class=\"" .
3524               (@parents > 1 ? "combined " : "") .
3525               "diff_tree\">\n";
3526
3527         # header only for combined diff in 'commitdiff' view
3528         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3529         if ($has_header) {
3530                 # table header
3531                 print "<thead><tr>\n" .
3532                        "<th></th><th></th>\n"; # filename, patchN link
3533                 for (my $i = 0; $i < @parents; $i++) {
3534                         my $par = $parents[$i];
3535                         print "<th>" .
3536                               $cgi->a({-href => href(action=>"commitdiff",
3537                                                      hash=>$hash, hash_parent=>$par),
3538                                        -title => 'commitdiff to parent number ' .
3539                                                   ($i+1) . ': ' . substr($par,0,7)},
3540                                       $i+1) .
3541                               "&nbsp;</th>\n";
3542                 }
3543                 print "</tr></thead>\n<tbody>\n";
3544         }
3545
3546         my $alternate = 1;
3547         my $patchno = 0;
3548         foreach my $line (@{$difftree}) {
3549                 my $diff = parsed_difftree_line($line);
3550
3551                 if ($alternate) {
3552                         print "<tr class=\"dark\">\n";
3553                 } else {
3554                         print "<tr class=\"light\">\n";
3555                 }
3556                 $alternate ^= 1;
3557
3558                 if (exists $diff->{'nparents'}) { # combined diff
3559
3560                         fill_from_file_info($diff, @parents)
3561                                 unless exists $diff->{'from_file'};
3562
3563                         if (!is_deleted($diff)) {
3564                                 # file exists in the result (child) commit
3565                                 print "<td>" .
3566                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3567                                                              file_name=>$diff->{'to_file'},
3568                                                              hash_base=>$hash),
3569                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3570                                       "</td>\n";
3571                         } else {
3572                                 print "<td>" .
3573                                       esc_path($diff->{'to_file'}) .
3574                                       "</td>\n";
3575                         }
3576
3577                         if ($action eq 'commitdiff') {
3578                                 # link to patch
3579                                 $patchno++;
3580                                 print "<td class=\"link\">" .
3581                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3582                                       " | " .
3583                                       "</td>\n";
3584                         }
3585
3586                         my $has_history = 0;
3587                         my $not_deleted = 0;
3588                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3589                                 my $hash_parent = $parents[$i];
3590                                 my $from_hash = $diff->{'from_id'}[$i];
3591                                 my $from_path = $diff->{'from_file'}[$i];
3592                                 my $status = $diff->{'status'}[$i];
3593
3594                                 $has_history ||= ($status ne 'A');
3595                                 $not_deleted ||= ($status ne 'D');
3596
3597                                 if ($status eq 'A') {
3598                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3599                                 } elsif ($status eq 'D') {
3600                                         print "<td class=\"link\">" .
3601                                               $cgi->a({-href => href(action=>"blob",
3602                                                                      hash_base=>$hash,
3603                                                                      hash=>$from_hash,
3604                                                                      file_name=>$from_path)},
3605                                                       "blob" . ($i+1)) .
3606                                               " | </td>\n";
3607                                 } else {
3608                                         if ($diff->{'to_id'} eq $from_hash) {
3609                                                 print "<td class=\"link nochange\">";
3610                                         } else {
3611                                                 print "<td class=\"link\">";
3612                                         }
3613                                         print $cgi->a({-href => href(action=>"blobdiff",
3614                                                                      hash=>$diff->{'to_id'},
3615                                                                      hash_parent=>$from_hash,
3616                                                                      hash_base=>$hash,
3617                                                                      hash_parent_base=>$hash_parent,
3618                                                                      file_name=>$diff->{'to_file'},
3619                                                                      file_parent=>$from_path)},
3620                                                       "diff" . ($i+1)) .
3621                                               " | </td>\n";
3622                                 }
3623                         }
3624
3625                         print "<td class=\"link\">";
3626                         if ($not_deleted) {
3627                                 print $cgi->a({-href => href(action=>"blob",
3628                                                              hash=>$diff->{'to_id'},
3629                                                              file_name=>$diff->{'to_file'},
3630                                                              hash_base=>$hash)},
3631                                               "blob");
3632                                 print " | " if ($has_history);
3633                         }
3634                         if ($has_history) {
3635                                 print $cgi->a({-href => href(action=>"history",
3636                                                              file_name=>$diff->{'to_file'},
3637                                                              hash_base=>$hash)},
3638                                               "history");
3639                         }
3640                         print "</td>\n";
3641
3642                         print "</tr>\n";
3643                         next; # instead of 'else' clause, to avoid extra indent
3644                 }
3645                 # else ordinary diff
3646
3647                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3648                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3649                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3650                         $to_mode_oct = oct $diff->{'to_mode'};
3651                         if (S_ISREG($to_mode_oct)) { # only for regular file
3652                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3653                         }
3654                         $to_file_type = file_type($diff->{'to_mode'});
3655                 }
3656                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3657                         $from_mode_oct = oct $diff->{'from_mode'};
3658                         if (S_ISREG($to_mode_oct)) { # only for regular file
3659                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3660                         }
3661                         $from_file_type = file_type($diff->{'from_mode'});
3662                 }
3663
3664                 if ($diff->{'status'} eq "A") { # created
3665                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3666                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3667                         $mode_chng   .= "]</span>";
3668                         print "<td>";
3669                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3670                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3671                                       -class => "list"}, esc_path($diff->{'file'}));
3672                         print "</td>\n";
3673                         print "<td>$mode_chng</td>\n";
3674                         print "<td class=\"link\">";
3675                         if ($action eq 'commitdiff') {
3676                                 # link to patch
3677                                 $patchno++;
3678                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3679                                 print " | ";
3680                         }
3681                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3682                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3683                                       "blob");
3684                         print "</td>\n";
3685
3686                 } elsif ($diff->{'status'} eq "D") { # deleted
3687                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3688                         print "<td>";
3689                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3690                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3691                                        -class => "list"}, esc_path($diff->{'file'}));
3692                         print "</td>\n";
3693                         print "<td>$mode_chng</td>\n";
3694                         print "<td class=\"link\">";
3695                         if ($action eq 'commitdiff') {
3696                                 # link to patch
3697                                 $patchno++;
3698                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3699                                 print " | ";
3700                         }
3701                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3702                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3703                                       "blob") . " | ";
3704                         if ($have_blame) {
3705                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3706                                                              file_name=>$diff->{'file'})},
3707                                               "blame") . " | ";
3708                         }
3709                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3710                                                      file_name=>$diff->{'file'})},
3711                                       "history");
3712                         print "</td>\n";
3713
3714                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3715                         my $mode_chnge = "";
3716                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3717                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3718                                 if ($from_file_type ne $to_file_type) {
3719                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3720                                 }
3721                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3722                                         if ($from_mode_str && $to_mode_str) {
3723                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3724                                         } elsif ($to_mode_str) {
3725                                                 $mode_chnge .= " mode: $to_mode_str";
3726                                         }
3727                                 }
3728                                 $mode_chnge .= "]</span>\n";
3729                         }
3730                         print "<td>";
3731                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3732                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3733                                       -class => "list"}, esc_path($diff->{'file'}));
3734                         print "</td>\n";
3735                         print "<td>$mode_chnge</td>\n";
3736                         print "<td class=\"link\">";
3737                         if ($action eq 'commitdiff') {
3738                                 # link to patch
3739                                 $patchno++;
3740                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3741                                       " | ";
3742                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3743                                 # "commit" view and modified file (not onlu mode changed)
3744                                 print $cgi->a({-href => href(action=>"blobdiff",
3745                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3746                                                              hash_base=>$hash, hash_parent_base=>$parent,
3747                                                              file_name=>$diff->{'file'})},
3748                                               "diff") .
3749                                       " | ";
3750                         }
3751                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3752                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3753                                        "blob") . " | ";
3754                         if ($have_blame) {
3755                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3756                                                              file_name=>$diff->{'file'})},
3757                                               "blame") . " | ";
3758                         }
3759                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3760                                                      file_name=>$diff->{'file'})},
3761                                       "history");
3762                         print "</td>\n";
3763
3764                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3765                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3766                         my $nstatus = $status_name{$diff->{'status'}};
3767                         my $mode_chng = "";
3768                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3769                                 # mode also for directories, so we cannot use $to_mode_str
3770                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3771                         }
3772                         print "<td>" .
3773                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3774                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3775                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3776                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3777                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3778                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3779                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3780                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3781                               "<td class=\"link\">";
3782                         if ($action eq 'commitdiff') {
3783                                 # link to patch
3784                                 $patchno++;
3785                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3786                                       " | ";
3787                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3788                                 # "commit" view and modified file (not only pure rename or copy)
3789                                 print $cgi->a({-href => href(action=>"blobdiff",
3790                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3791                                                              hash_base=>$hash, hash_parent_base=>$parent,
3792                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3793                                               "diff") .
3794                                       " | ";
3795                         }
3796                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3797                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3798                                       "blob") . " | ";
3799                         if ($have_blame) {
3800                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3801                                                              file_name=>$diff->{'to_file'})},
3802                                               "blame") . " | ";
3803                         }
3804                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3805                                                     file_name=>$diff->{'to_file'})},
3806                                       "history");
3807                         print "</td>\n";
3808
3809                 } # we should not encounter Unmerged (U) or Unknown (X) status
3810                 print "</tr>\n";
3811         }
3812         print "</tbody>" if $has_header;
3813         print "</table>\n";
3814 }
3815
3816 sub git_patchset_body {
3817         my ($fd, $difftree, $hash, @hash_parents) = @_;
3818         my ($hash_parent) = $hash_parents[0];
3819
3820         my $is_combined = (@hash_parents > 1);
3821         my $patch_idx = 0;
3822         my $patch_number = 0;
3823         my $patch_line;
3824         my $diffinfo;
3825         my $to_name;
3826         my (%from, %to);
3827
3828         print "<div class=\"patchset\">\n";
3829
3830         # skip to first patch
3831         while ($patch_line = <$fd>) {
3832                 chomp $patch_line;
3833
3834                 last if ($patch_line =~ m/^diff /);
3835         }
3836
3837  PATCH:
3838         while ($patch_line) {
3839
3840                 # parse "git diff" header line
3841                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3842                         # $1 is from_name, which we do not use
3843                         $to_name = unquote($2);
3844                         $to_name =~ s!^b/!!;
3845                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3846                         # $1 is 'cc' or 'combined', which we do not use
3847                         $to_name = unquote($2);
3848                 } else {
3849                         $to_name = undef;
3850                 }
3851
3852                 # check if current patch belong to current raw line
3853                 # and parse raw git-diff line if needed
3854                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3855                         # this is continuation of a split patch
3856                         print "<div class=\"patch cont\">\n";
3857                 } else {
3858                         # advance raw git-diff output if needed
3859                         $patch_idx++ if defined $diffinfo;
3860
3861                         # read and prepare patch information
3862                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3863
3864                         # compact combined diff output can have some patches skipped
3865                         # find which patch (using pathname of result) we are at now;
3866                         if ($is_combined) {
3867                                 while ($to_name ne $diffinfo->{'to_file'}) {
3868                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3869                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3870                                               "</div>\n";  # class="patch"
3871
3872                                         $patch_idx++;
3873                                         $patch_number++;
3874
3875                                         last if $patch_idx > $#$difftree;
3876                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3877                                 }
3878                         }
3879
3880                         # modifies %from, %to hashes
3881                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3882
3883                         # this is first patch for raw difftree line with $patch_idx index
3884                         # we index @$difftree array from 0, but number patches from 1
3885                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3886                 }
3887
3888                 # git diff header
3889                 #assert($patch_line =~ m/^diff /) if DEBUG;
3890                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3891                 $patch_number++;
3892                 # print "git diff" header
3893                 print format_git_diff_header_line($patch_line, $diffinfo,
3894                                                   \%from, \%to);
3895
3896                 # print extended diff header
3897                 print "<div class=\"diff extended_header\">\n";
3898         EXTENDED_HEADER:
3899                 while ($patch_line = <$fd>) {
3900                         chomp $patch_line;
3901
3902                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3903
3904                         print format_extended_diff_header_line($patch_line, $diffinfo,
3905                                                                \%from, \%to);
3906                 }
3907                 print "</div>\n"; # class="diff extended_header"
3908
3909                 # from-file/to-file diff header
3910                 if (! $patch_line) {
3911                         print "</div>\n"; # class="patch"
3912                         last PATCH;
3913                 }
3914                 next PATCH if ($patch_line =~ m/^diff /);
3915                 #assert($patch_line =~ m/^---/) if DEBUG;
3916
3917                 my $last_patch_line = $patch_line;
3918                 $patch_line = <$fd>;
3919                 chomp $patch_line;
3920                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3921
3922                 print format_diff_from_to_header($last_patch_line, $patch_line,
3923                                                  $diffinfo, \%from, \%to,
3924                                                  @hash_parents);
3925
3926                 # the patch itself
3927         LINE:
3928                 while ($patch_line = <$fd>) {
3929                         chomp $patch_line;
3930
3931                         next PATCH if ($patch_line =~ m/^diff /);
3932
3933                         print format_diff_line($patch_line, \%from, \%to);
3934                 }
3935
3936         } continue {
3937                 print "</div>\n"; # class="patch"
3938         }
3939
3940         # for compact combined (--cc) format, with chunk and patch simpliciaction
3941         # patchset might be empty, but there might be unprocessed raw lines
3942         for (++$patch_idx if $patch_number > 0;
3943              $patch_idx < @$difftree;
3944              ++$patch_idx) {
3945                 # read and prepare patch information
3946                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3947
3948                 # generate anchor for "patch" links in difftree / whatchanged part
3949                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3950                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3951                       "</div>\n";  # class="patch"
3952
3953                 $patch_number++;
3954         }
3955
3956         if ($patch_number == 0) {
3957                 if (@hash_parents > 1) {
3958                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3959                 } else {
3960                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3961                 }
3962         }
3963
3964         print "</div>\n"; # class="patchset"
3965 }
3966
3967 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3968
3969 # fills project list info (age, description, owner, forks) for each
3970 # project in the list, removing invalid projects from returned list
3971 # NOTE: modifies $projlist, but does not remove entries from it
3972 sub fill_project_list_info {
3973         my ($projlist, $check_forks) = @_;
3974         my @projects;
3975
3976         my $show_ctags = gitweb_check_feature('ctags');
3977  PROJECT:
3978         foreach my $pr (@$projlist) {
3979                 my (@activity) = git_get_last_activity($pr->{'path'});
3980                 unless (@activity) {
3981                         next PROJECT;
3982                 }
3983                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3984                 if (!defined $pr->{'descr'}) {
3985                         my $descr = git_get_project_description($pr->{'path'}) || "";
3986                         $descr = to_utf8($descr);
3987                         $pr->{'descr_long'} = $descr;
3988                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3989                 }
3990                 if (!defined $pr->{'owner'}) {
3991                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3992                 }
3993                 if ($check_forks) {
3994                         my $pname = $pr->{'path'};
3995                         if (($pname =~ s/\.git$//) &&
3996                             ($pname !~ /\/$/) &&
3997                             (-d "$projectroot/$pname")) {
3998                                 $pr->{'forks'} = "-d $projectroot/$pname";
3999                         }       else {
4000                                 $pr->{'forks'} = 0;
4001                         }
4002                 }
4003                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4004                 push @projects, $pr;
4005         }
4006
4007         return @projects;
4008 }
4009
4010 # print 'sort by' <th> element, generating 'sort by $name' replay link
4011 # if that order is not selected
4012 sub print_sort_th {
4013         my ($name, $order, $header) = @_;
4014         $header ||= ucfirst($name);
4015
4016         if ($order eq $name) {
4017                 print "<th>$header</th>\n";
4018         } else {
4019                 print "<th>" .
4020                       $cgi->a({-href => href(-replay=>1, order=>$name),
4021                                -class => "header"}, $header) .
4022                       "</th>\n";
4023         }
4024 }
4025
4026 sub git_project_list_body {
4027         # actually uses global variable $project
4028         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4029
4030         my $check_forks = gitweb_check_feature('forks');
4031         my @projects = fill_project_list_info($projlist, $check_forks);
4032
4033         $order ||= $default_projects_order;
4034         $from = 0 unless defined $from;
4035         $to = $#projects if (!defined $to || $#projects < $to);
4036
4037         my %order_info = (
4038                 project => { key => 'path', type => 'str' },
4039                 descr => { key => 'descr_long', type => 'str' },
4040                 owner => { key => 'owner', type => 'str' },
4041                 age => { key => 'age', type => 'num' }
4042         );
4043         my $oi = $order_info{$order};
4044         if ($oi->{'type'} eq 'str') {
4045                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4046         } else {
4047                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4048         }
4049
4050         my $show_ctags = gitweb_check_feature('ctags');
4051         if ($show_ctags) {
4052                 my %ctags;
4053                 foreach my $p (@projects) {
4054                         foreach my $ct (keys %{$p->{'ctags'}}) {
4055                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4056                         }
4057                 }
4058                 my $cloud = git_populate_project_tagcloud(\%ctags);
4059                 print git_show_project_tagcloud($cloud, 64);
4060         }
4061
4062         print "<table class=\"project_list\">\n";
4063         unless ($no_header) {
4064                 print "<tr>\n";
4065                 if ($check_forks) {
4066                         print "<th></th>\n";
4067                 }
4068                 print_sort_th('project', $order, 'Project');
4069                 print_sort_th('descr', $order, 'Description');
4070                 print_sort_th('owner', $order, 'Owner');
4071                 print_sort_th('age', $order, 'Last Change');
4072                 print "<th></th>\n" . # for links
4073                       "</tr>\n";
4074         }
4075         my $alternate = 1;
4076         my $tagfilter = $cgi->param('by_tag');
4077         for (my $i = $from; $i <= $to; $i++) {
4078                 my $pr = $projects[$i];
4079
4080                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4081                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4082                         and not $pr->{'descr_long'} =~ /$searchtext/;
4083                 # Weed out forks or non-matching entries of search
4084                 if ($check_forks) {
4085                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4086                         $forkbase="^$forkbase" if $forkbase;
4087                         next if not $searchtext and not $tagfilter and $show_ctags
4088                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4089                 }
4090
4091                 if ($alternate) {
4092                         print "<tr class=\"dark\">\n";
4093                 } else {
4094                         print "<tr class=\"light\">\n";
4095                 }
4096                 $alternate ^= 1;
4097                 if ($check_forks) {
4098                         print "<td>";
4099                         if ($pr->{'forks'}) {
4100                                 print "<!-- $pr->{'forks'} -->\n";
4101                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4102                         }
4103                         print "</td>\n";
4104                 }
4105                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4106                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4107                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4108                                         -class => "list", -title => $pr->{'descr_long'}},
4109                                         esc_html($pr->{'descr'})) . "</td>\n" .
4110                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4111                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4112                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4113                       "<td class=\"link\">" .
4114                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4115                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4116                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4117                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4118                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4119                       "</td>\n" .
4120                       "</tr>\n";
4121         }
4122         if (defined $extra) {
4123                 print "<tr>\n";
4124                 if ($check_forks) {
4125                         print "<td></td>\n";
4126                 }
4127                 print "<td colspan=\"5\">$extra</td>\n" .
4128                       "</tr>\n";
4129         }
4130         print "</table>\n";
4131 }
4132
4133 sub git_shortlog_body {
4134         # uses global variable $project
4135         my ($commitlist, $from, $to, $refs, $extra) = @_;
4136
4137         $from = 0 unless defined $from;
4138         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4139
4140         print "<table class=\"shortlog\">\n";
4141         my $alternate = 1;
4142         for (my $i = $from; $i <= $to; $i++) {
4143                 my %co = %{$commitlist->[$i]};
4144                 my $commit = $co{'id'};
4145                 my $ref = format_ref_marker($refs, $commit);
4146                 if ($alternate) {
4147                         print "<tr class=\"dark\">\n";
4148                 } else {
4149                         print "<tr class=\"light\">\n";
4150                 }
4151                 $alternate ^= 1;
4152                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4153                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4154                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4155                       "<td><i>" . $author . "</i></td>\n" .
4156                       "<td>";
4157                 print format_subject_html($co{'title'}, $co{'title_short'},
4158                                           href(action=>"commit", hash=>$commit), $ref);
4159                 print "</td>\n" .
4160                       "<td class=\"link\">" .
4161                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4162                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4163                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4164                 my $snapshot_links = format_snapshot_links($commit);
4165                 if (defined $snapshot_links) {
4166                         print " | " . $snapshot_links;
4167                 }
4168                 print "</td>\n" .
4169                       "</tr>\n";
4170         }
4171         if (defined $extra) {
4172                 print "<tr>\n" .
4173                       "<td colspan=\"4\">$extra</td>\n" .
4174                       "</tr>\n";
4175         }
4176         print "</table>\n";
4177 }
4178
4179 sub git_history_body {
4180         # Warning: assumes constant type (blob or tree) during history
4181         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4182
4183         $from = 0 unless defined $from;
4184         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4185
4186         print "<table class=\"history\">\n";
4187         my $alternate = 1;
4188         for (my $i = $from; $i <= $to; $i++) {
4189                 my %co = %{$commitlist->[$i]};
4190                 if (!%co) {
4191                         next;
4192                 }
4193                 my $commit = $co{'id'};
4194
4195                 my $ref = format_ref_marker($refs, $commit);
4196
4197                 if ($alternate) {
4198                         print "<tr class=\"dark\">\n";
4199                 } else {
4200                         print "<tr class=\"light\">\n";
4201                 }
4202                 $alternate ^= 1;
4203         # shortlog uses      chop_str($co{'author_name'}, 10)
4204                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4205                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4206                       "<td><i>" . $author . "</i></td>\n" .
4207                       "<td>";
4208                 # originally git_history used chop_str($co{'title'}, 50)
4209                 print format_subject_html($co{'title'}, $co{'title_short'},
4210                                           href(action=>"commit", hash=>$commit), $ref);
4211                 print "</td>\n" .
4212                       "<td class=\"link\">" .
4213                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4214                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4215
4216                 if ($ftype eq 'blob') {
4217                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4218                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4219                         if (defined $blob_current && defined $blob_parent &&
4220                                         $blob_current ne $blob_parent) {
4221                                 print " | " .
4222                                         $cgi->a({-href => href(action=>"blobdiff",
4223                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4224                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4225                                                                file_name=>$file_name)},
4226                                                 "diff to current");
4227                         }
4228                 }
4229                 print "</td>\n" .
4230                       "</tr>\n";
4231         }
4232         if (defined $extra) {
4233                 print "<tr>\n" .
4234                       "<td colspan=\"4\">$extra</td>\n" .
4235                       "</tr>\n";
4236         }
4237         print "</table>\n";
4238 }
4239
4240 sub git_tags_body {
4241         # uses global variable $project
4242         my ($taglist, $from, $to, $extra) = @_;
4243         $from = 0 unless defined $from;
4244         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4245
4246         print "<table class=\"tags\">\n";
4247         my $alternate = 1;
4248         for (my $i = $from; $i <= $to; $i++) {
4249                 my $entry = $taglist->[$i];
4250                 my %tag = %$entry;
4251                 my $comment = $tag{'subject'};
4252                 my $comment_short;
4253                 if (defined $comment) {
4254                         $comment_short = chop_str($comment, 30, 5);
4255                 }
4256                 if ($alternate) {
4257                         print "<tr class=\"dark\">\n";
4258                 } else {
4259                         print "<tr class=\"light\">\n";
4260                 }
4261                 $alternate ^= 1;
4262                 if (defined $tag{'age'}) {
4263                         print "<td><i>$tag{'age'}</i></td>\n";
4264                 } else {
4265                         print "<td></td>\n";
4266                 }
4267                 print "<td>" .
4268                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4269                                -class => "list name"}, esc_html($tag{'name'})) .
4270                       "</td>\n" .
4271                       "<td>";
4272                 if (defined $comment) {
4273                         print format_subject_html($comment, $comment_short,
4274                                                   href(action=>"tag", hash=>$tag{'id'}));
4275                 }
4276                 print "</td>\n" .
4277                       "<td class=\"selflink\">";
4278                 if ($tag{'type'} eq "tag") {
4279                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4280                 } else {
4281                         print "&nbsp;";
4282                 }
4283                 print "</td>\n" .
4284                       "<td class=\"link\">" . " | " .
4285                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4286                 if ($tag{'reftype'} eq "commit") {
4287                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4288                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4289                 } elsif ($tag{'reftype'} eq "blob") {
4290                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4291                 }
4292                 print "</td>\n" .
4293                       "</tr>";
4294         }
4295         if (defined $extra) {
4296                 print "<tr>\n" .
4297                       "<td colspan=\"5\">$extra</td>\n" .
4298                       "</tr>\n";
4299         }
4300         print "</table>\n";
4301 }
4302
4303 sub git_heads_body {
4304         # uses global variable $project
4305         my ($headlist, $head, $from, $to, $extra) = @_;
4306         $from = 0 unless defined $from;
4307         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4308
4309         print "<table class=\"heads\">\n";
4310         my $alternate = 1;
4311         for (my $i = $from; $i <= $to; $i++) {
4312                 my $entry = $headlist->[$i];
4313                 my %ref = %$entry;
4314                 my $curr = $ref{'id'} eq $head;
4315                 if ($alternate) {
4316                         print "<tr class=\"dark\">\n";
4317                 } else {
4318                         print "<tr class=\"light\">\n";
4319                 }
4320                 $alternate ^= 1;
4321                 print "<td><i>$ref{'age'}</i></td>\n" .
4322                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4323                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4324                                -class => "list name"},esc_html($ref{'name'})) .
4325                       "</td>\n" .
4326                       "<td class=\"link\">" .
4327                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4328                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4329                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4330                       "</td>\n" .
4331                       "</tr>";
4332         }
4333         if (defined $extra) {
4334                 print "<tr>\n" .
4335                       "<td colspan=\"3\">$extra</td>\n" .
4336                       "</tr>\n";
4337         }
4338         print "</table>\n";
4339 }
4340
4341 sub git_search_grep_body {
4342         my ($commitlist, $from, $to, $extra) = @_;
4343         $from = 0 unless defined $from;
4344         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4345
4346         print "<table class=\"commit_search\">\n";
4347         my $alternate = 1;
4348         for (my $i = $from; $i <= $to; $i++) {
4349                 my %co = %{$commitlist->[$i]};
4350                 if (!%co) {
4351                         next;
4352                 }
4353                 my $commit = $co{'id'};
4354                 if ($alternate) {
4355                         print "<tr class=\"dark\">\n";
4356                 } else {
4357                         print "<tr class=\"light\">\n";
4358                 }
4359                 $alternate ^= 1;
4360                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4361                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4362                       "<td><i>" . $author . "</i></td>\n" .
4363                       "<td>" .
4364                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4365                                -class => "list subject"},
4366                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4367                 my $comment = $co{'comment'};
4368                 foreach my $line (@$comment) {
4369                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4370                                 my ($lead, $match, $trail) = ($1, $2, $3);
4371                                 $match = chop_str($match, 70, 5, 'center');
4372                                 my $contextlen = int((80 - length($match))/2);
4373                                 $contextlen = 30 if ($contextlen > 30);
4374                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4375                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4376
4377                                 $lead  = esc_html($lead);
4378                                 $match = esc_html($match);
4379                                 $trail = esc_html($trail);
4380
4381                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4382                         }
4383                 }
4384                 print "</td>\n" .
4385                       "<td class=\"link\">" .
4386                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4387                       " | " .
4388                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4389                       " | " .
4390                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4391                 print "</td>\n" .
4392                       "</tr>\n";
4393         }
4394         if (defined $extra) {
4395                 print "<tr>\n" .
4396                       "<td colspan=\"3\">$extra</td>\n" .
4397                       "</tr>\n";
4398         }
4399         print "</table>\n";
4400 }
4401
4402 ## ======================================================================
4403 ## ======================================================================
4404 ## actions
4405
4406 sub git_project_list {
4407         my $order = $input_params{'order'};
4408         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4409                 die_error(400, "Unknown order parameter");
4410         }
4411
4412         my @list = git_get_projects_list();
4413         if (!@list) {
4414                 die_error(404, "No projects found");
4415         }
4416
4417         git_header_html();
4418         if (-f $home_text) {
4419                 print "<div class=\"index_include\">\n";
4420                 insert_file($home_text);
4421                 print "</div>\n";
4422         }
4423         print $cgi->startform(-method => "get") .
4424               "<p class=\"projsearch\">Search:\n" .
4425               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4426               "</p>" .
4427               $cgi->end_form() . "\n";
4428         git_project_list_body(\@list, $order);
4429         git_footer_html();
4430 }
4431
4432 sub git_forks {
4433         my $order = $input_params{'order'};
4434         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4435                 die_error(400, "Unknown order parameter");
4436         }
4437
4438         my @list = git_get_projects_list($project);
4439         if (!@list) {
4440                 die_error(404, "No forks found");
4441         }
4442
4443         git_header_html();
4444         git_print_page_nav('','');
4445         git_print_header_div('summary', "$project forks");
4446         git_project_list_body(\@list, $order);
4447         git_footer_html();
4448 }
4449
4450 sub git_project_index {
4451         my @projects = git_get_projects_list($project);
4452
4453         print $cgi->header(
4454                 -type => 'text/plain',
4455                 -charset => 'utf-8',
4456                 -content_disposition => 'inline; filename="index.aux"');
4457
4458         foreach my $pr (@projects) {
4459                 if (!exists $pr->{'owner'}) {
4460                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4461                 }
4462
4463                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4464                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4465                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4466                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4467                 $path  =~ s/ /\+/g;
4468                 $owner =~ s/ /\+/g;
4469
4470                 print "$path $owner\n";
4471         }
4472 }
4473
4474 sub git_summary {
4475         my $descr = git_get_project_description($project) || "none";
4476         my %co = parse_commit("HEAD");
4477         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4478         my $head = $co{'id'};
4479
4480         my $owner = git_get_project_owner($project);
4481
4482         my $refs = git_get_references();
4483         # These get_*_list functions return one more to allow us to see if
4484         # there are more ...
4485         my @taglist  = git_get_tags_list(16);
4486         my @headlist = git_get_heads_list(16);
4487         my @forklist;
4488         my $check_forks = gitweb_check_feature('forks');
4489
4490         if ($check_forks) {
4491                 @forklist = git_get_projects_list($project);
4492         }
4493
4494         git_header_html();
4495         git_print_page_nav('summary','', $head);
4496
4497         print "<div class=\"title\">&nbsp;</div>\n";
4498         print "<table class=\"projects_list\">\n" .
4499               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4500               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4501         if (defined $cd{'rfc2822'}) {
4502                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4503         }
4504
4505         # use per project git URL list in $projectroot/$project/cloneurl
4506         # or make project git URL from git base URL and project name
4507         my $url_tag = "URL";
4508         my @url_list = git_get_project_url_list($project);
4509         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4510         foreach my $git_url (@url_list) {
4511                 next unless $git_url;
4512                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4513                 $url_tag = "";
4514         }
4515
4516         # Tag cloud
4517         my $show_ctags = gitweb_check_feature('ctags');
4518         if ($show_ctags) {
4519                 my $ctags = git_get_project_ctags($project);
4520                 my $cloud = git_populate_project_tagcloud($ctags);
4521                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4522                 print "</td>\n<td>" unless %$ctags;
4523                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4524                 print "</td>\n<td>" if %$ctags;
4525                 print git_show_project_tagcloud($cloud, 48);
4526                 print "</td></tr>";
4527         }
4528
4529         print "</table>\n";
4530
4531         # If XSS prevention is on, we don't include README.html.
4532         # TODO: Allow a readme in some safe format.
4533         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4534                 print "<div class=\"title\">readme</div>\n" .
4535                       "<div class=\"readme\">\n";
4536                 insert_file("$projectroot/$project/README.html");
4537                 print "\n</div>\n"; # class="readme"
4538         }
4539
4540         # we need to request one more than 16 (0..15) to check if
4541         # those 16 are all
4542         my @commitlist = $head ? parse_commits($head, 17) : ();
4543         if (@commitlist) {
4544                 git_print_header_div('shortlog');
4545                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4546                                   $#commitlist <=  15 ? undef :
4547                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4548         }
4549
4550         if (@taglist) {
4551                 git_print_header_div('tags');
4552                 git_tags_body(\@taglist, 0, 15,
4553                               $#taglist <=  15 ? undef :
4554                               $cgi->a({-href => href(action=>"tags")}, "..."));
4555         }
4556
4557         if (@headlist) {
4558                 git_print_header_div('heads');
4559                 git_heads_body(\@headlist, $head, 0, 15,
4560                                $#headlist <= 15 ? undef :
4561                                $cgi->a({-href => href(action=>"heads")}, "..."));
4562         }
4563
4564         if (@forklist) {
4565                 git_print_header_div('forks');
4566                 git_project_list_body(\@forklist, 'age', 0, 15,
4567                                       $#forklist <= 15 ? undef :
4568                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4569                                       'no_header');
4570         }
4571
4572         git_footer_html();
4573 }
4574
4575 sub git_tag {
4576         my $head = git_get_head_hash($project);
4577         git_header_html();
4578         git_print_page_nav('','', $head,undef,$head);
4579         my %tag = parse_tag($hash);
4580
4581         if (! %tag) {
4582                 die_error(404, "Unknown tag object");
4583         }
4584
4585         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4586         print "<div class=\"title_text\">\n" .
4587               "<table class=\"object_header\">\n" .
4588               "<tr>\n" .
4589               "<td>object</td>\n" .
4590               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4591                                $tag{'object'}) . "</td>\n" .
4592               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4593                                               $tag{'type'}) . "</td>\n" .
4594               "</tr>\n";
4595         if (defined($tag{'author'})) {
4596                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4597                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4598                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4599                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4600                         "</td></tr>\n";
4601         }
4602         print "</table>\n\n" .
4603               "</div>\n";
4604         print "<div class=\"page_body\">";
4605         my $comment = $tag{'comment'};
4606         foreach my $line (@$comment) {
4607                 chomp $line;
4608                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4609         }
4610         print "</div>\n";
4611         git_footer_html();
4612 }
4613
4614 sub git_blame {
4615         # permissions
4616         gitweb_check_feature('blame')
4617                 or die_error(403, "Blame view not allowed");
4618
4619         # error checking
4620         die_error(400, "No file name given") unless $file_name;
4621         $hash_base ||= git_get_head_hash($project);
4622         die_error(404, "Couldn't find base commit") unless $hash_base;
4623         my %co = parse_commit($hash_base)
4624                 or die_error(404, "Commit not found");
4625         my $ftype = "blob";
4626         if (!defined $hash) {
4627                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4628                         or die_error(404, "Error looking up file");
4629         } else {
4630                 $ftype = git_get_type($hash);
4631                 if ($ftype !~ "blob") {
4632                         die_error(400, "Object is not a blob");
4633                 }
4634         }
4635
4636         # run git-blame --porcelain
4637         open my $fd, "-|", git_cmd(), "blame", '-p',
4638                 $hash_base, '--', $file_name
4639                 or die_error(500, "Open git-blame failed");
4640
4641         # page header
4642         git_header_html();
4643         my $formats_nav =
4644                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4645                         "blob") .
4646                 " | " .
4647                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4648                         "history") .
4649                 " | " .
4650                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4651                         "HEAD");
4652         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4653         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4654         git_print_page_path($file_name, $ftype, $hash_base);
4655
4656         # page body
4657         my @rev_color = qw(light2 dark2);
4658         my $num_colors = scalar(@rev_color);
4659         my $current_color = 0;
4660         my %metainfo = ();
4661
4662         print <<HTML;
4663 <div class="page_body">
4664 <table class="blame">
4665 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4666 HTML
4667  LINE:
4668         while (my $line = <$fd>) {
4669                 chomp $line;
4670                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4671                 # no <lines in group> for subsequent lines in group of lines
4672                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4673                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4674                 if (!exists $metainfo{$full_rev}) {
4675                         $metainfo{$full_rev} = {};
4676                 }
4677                 my $meta = $metainfo{$full_rev};
4678                 my $data;
4679                 while ($data = <$fd>) {
4680                         chomp $data;
4681                         last if ($data =~ s/^\t//); # contents of line
4682                         if ($data =~ /^(\S+) (.*)$/) {
4683                                 $meta->{$1} = $2;
4684                         }
4685                 }
4686                 my $short_rev = substr($full_rev, 0, 8);
4687                 my $author = $meta->{'author'};
4688                 my %date =
4689                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4690                 my $date = $date{'iso-tz'};
4691                 if ($group_size) {
4692                         $current_color = ($current_color + 1) % $num_colors;
4693                 }
4694                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4695                 if ($group_size) {
4696                         print "<td class=\"sha1\"";
4697                         print " title=\"". esc_html($author) . ", $date\"";
4698                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4699                         print ">";
4700                         print $cgi->a({-href => href(action=>"commit",
4701                                                      hash=>$full_rev,
4702                                                      file_name=>$file_name)},
4703                                       esc_html($short_rev));
4704                         print "</td>\n";
4705                 }
4706                 my $parent_commit;
4707                 if (!exists $meta->{'parent'}) {
4708                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4709                                 or die_error(500, "Open git-rev-parse failed");
4710                         $parent_commit = <$dd>;
4711                         close $dd;
4712                         chomp($parent_commit);
4713                         $meta->{'parent'} = $parent_commit;
4714                 } else {
4715                         $parent_commit = $meta->{'parent'};
4716                 }
4717                 my $blamed = href(action => 'blame',
4718                                   file_name => $meta->{'filename'},
4719                                   hash_base => $parent_commit);
4720                 print "<td class=\"linenr\">";
4721                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4722                                 -class => "linenr" },
4723                               esc_html($lineno));
4724                 print "</td>";
4725                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4726                 print "</tr>\n";
4727         }
4728         print "</table>\n";
4729         print "</div>";
4730         close $fd
4731                 or print "Reading blob failed\n";
4732
4733         # page footer
4734         git_footer_html();
4735 }
4736
4737 sub git_tags {
4738         my $head = git_get_head_hash($project);
4739         git_header_html();
4740         git_print_page_nav('','', $head,undef,$head);
4741         git_print_header_div('summary', $project);
4742
4743         my @tagslist = git_get_tags_list();
4744         if (@tagslist) {
4745                 git_tags_body(\@tagslist);
4746         }
4747         git_footer_html();
4748 }
4749
4750 sub git_heads {
4751         my $head = git_get_head_hash($project);
4752         git_header_html();
4753         git_print_page_nav('','', $head,undef,$head);
4754         git_print_header_div('summary', $project);
4755
4756         my @headslist = git_get_heads_list();
4757         if (@headslist) {
4758                 git_heads_body(\@headslist, $head);
4759         }
4760         git_footer_html();
4761 }
4762
4763 sub git_blob_plain {
4764         my $type = shift;
4765         my $expires;
4766
4767         if (!defined $hash) {
4768                 if (defined $file_name) {
4769                         my $base = $hash_base || git_get_head_hash($project);
4770                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4771                                 or die_error(404, "Cannot find file");
4772                 } else {
4773                         die_error(400, "No file name defined");
4774                 }
4775         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4776                 # blobs defined by non-textual hash id's can be cached
4777                 $expires = "+1d";
4778         }
4779
4780         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4781                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4782
4783         # content-type (can include charset)
4784         $type = blob_contenttype($fd, $file_name, $type);
4785
4786         # "save as" filename, even when no $file_name is given
4787         my $save_as = "$hash";
4788         if (defined $file_name) {
4789                 $save_as = $file_name;
4790         } elsif ($type =~ m/^text\//) {
4791                 $save_as .= '.txt';
4792         }
4793
4794         # With XSS prevention on, blobs of all types except a few known safe
4795         # ones are served with "Content-Disposition: attachment" to make sure
4796         # they don't run in our security domain.  For certain image types,
4797         # blob view writes an <img> tag referring to blob_plain view, and we
4798         # want to be sure not to break that by serving the image as an
4799         # attachment (though Firefox 3 doesn't seem to care).
4800         my $sandbox = $prevent_xss &&
4801                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4802
4803         print $cgi->header(
4804                 -type => $type,
4805                 -expires => $expires,
4806                 -content_disposition =>
4807                         ($sandbox ? 'attachment' : 'inline')
4808                         . '; filename="' . $save_as . '"');
4809         undef $/;
4810         binmode STDOUT, ':raw';
4811         print <$fd>;
4812         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4813         $/ = "\n";
4814         close $fd;
4815 }
4816
4817 sub git_blob {
4818         my $expires;
4819
4820         if (!defined $hash) {
4821                 if (defined $file_name) {
4822                         my $base = $hash_base || git_get_head_hash($project);
4823                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4824                                 or die_error(404, "Cannot find file");
4825                 } else {
4826                         die_error(400, "No file name defined");
4827                 }
4828         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4829                 # blobs defined by non-textual hash id's can be cached
4830                 $expires = "+1d";
4831         }
4832
4833         my $have_blame = gitweb_check_feature('blame');
4834         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4835                 or die_error(500, "Couldn't cat $file_name, $hash");
4836         my $mimetype = blob_mimetype($fd, $file_name);
4837         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4838                 close $fd;
4839                 return git_blob_plain($mimetype);
4840         }
4841         # we can have blame only for text/* mimetype
4842         $have_blame &&= ($mimetype =~ m!^text/!);
4843
4844         git_header_html(undef, $expires);
4845         my $formats_nav = '';
4846         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4847                 if (defined $file_name) {
4848                         if ($have_blame) {
4849                                 $formats_nav .=
4850                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4851                                                 "blame") .
4852                                         " | ";
4853                         }
4854                         $formats_nav .=
4855                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4856                                         "history") .
4857                                 " | " .
4858                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4859                                         "raw") .
4860                                 " | " .
4861                                 $cgi->a({-href => href(action=>"blob",
4862                                                        hash_base=>"HEAD", file_name=>$file_name)},
4863                                         "HEAD");
4864                 } else {
4865                         $formats_nav .=
4866                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4867                                         "raw");
4868                 }
4869                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4870                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4871         } else {
4872                 print "<div class=\"page_nav\">\n" .
4873                       "<br/><br/></div>\n" .
4874                       "<div class=\"title\">$hash</div>\n";
4875         }
4876         git_print_page_path($file_name, "blob", $hash_base);
4877         print "<div class=\"page_body\">\n";
4878         if ($mimetype =~ m!^image/!) {
4879                 print qq!<img type="$mimetype"!;
4880                 if ($file_name) {
4881                         print qq! alt="$file_name" title="$file_name"!;
4882                 }
4883                 print qq! src="! .
4884                       href(action=>"blob_plain", hash=>$hash,
4885                            hash_base=>$hash_base, file_name=>$file_name) .
4886                       qq!" />\n!;
4887         } else {
4888                 my $nr;
4889                 while (my $line = <$fd>) {
4890                         chomp $line;
4891                         $nr++;
4892                         $line = untabify($line);
4893                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4894                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4895                 }
4896         }
4897         close $fd
4898                 or print "Reading blob failed.\n";
4899         print "</div>";
4900         git_footer_html();
4901 }
4902
4903 sub git_tree {
4904         if (!defined $hash_base) {
4905                 $hash_base = "HEAD";
4906         }
4907         if (!defined $hash) {
4908                 if (defined $file_name) {
4909                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4910                 } else {
4911                         $hash = $hash_base;
4912                 }
4913         }
4914         die_error(404, "No such tree") unless defined($hash);
4915         $/ = "\0";
4916         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4917                 or die_error(500, "Open git-ls-tree failed");
4918         my @entries = map { chomp; $_ } <$fd>;
4919         close $fd or die_error(404, "Reading tree failed");
4920         $/ = "\n";
4921
4922         my $refs = git_get_references();
4923         my $ref = format_ref_marker($refs, $hash_base);
4924         git_header_html();
4925         my $basedir = '';
4926         my $have_blame = gitweb_check_feature('blame');
4927         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4928                 my @views_nav = ();
4929                 if (defined $file_name) {
4930                         push @views_nav,
4931                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4932                                         "history"),
4933                                 $cgi->a({-href => href(action=>"tree",
4934                                                        hash_base=>"HEAD", file_name=>$file_name)},
4935                                         "HEAD"),
4936                 }
4937                 my $snapshot_links = format_snapshot_links($hash);
4938                 if (defined $snapshot_links) {
4939                         # FIXME: Should be available when we have no hash base as well.
4940                         push @views_nav, $snapshot_links;
4941                 }
4942                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4943                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4944         } else {
4945                 undef $hash_base;
4946                 print "<div class=\"page_nav\">\n";
4947                 print "<br/><br/></div>\n";
4948                 print "<div class=\"title\">$hash</div>\n";
4949         }
4950         if (defined $file_name) {
4951                 $basedir = $file_name;
4952                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4953                         $basedir .= '/';
4954                 }
4955                 git_print_page_path($file_name, 'tree', $hash_base);
4956         }
4957         print "<div class=\"page_body\">\n";
4958         print "<table class=\"tree\">\n";
4959         my $alternate = 1;
4960         # '..' (top directory) link if possible
4961         if (defined $hash_base &&
4962             defined $file_name && $file_name =~ m![^/]+$!) {
4963                 if ($alternate) {
4964                         print "<tr class=\"dark\">\n";
4965                 } else {
4966                         print "<tr class=\"light\">\n";
4967                 }
4968                 $alternate ^= 1;
4969
4970                 my $up = $file_name;
4971                 $up =~ s!/?[^/]+$!!;
4972                 undef $up unless $up;
4973                 # based on git_print_tree_entry
4974                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4975                 print '<td class="list">';
4976                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4977                                              file_name=>$up)},
4978                               "..");
4979                 print "</td>\n";
4980                 print "<td class=\"link\"></td>\n";
4981
4982                 print "</tr>\n";
4983         }
4984         foreach my $line (@entries) {
4985                 my %t = parse_ls_tree_line($line, -z => 1);
4986
4987                 if ($alternate) {
4988                         print "<tr class=\"dark\">\n";
4989                 } else {
4990                         print "<tr class=\"light\">\n";
4991                 }
4992                 $alternate ^= 1;
4993
4994                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4995
4996                 print "</tr>\n";
4997         }
4998         print "</table>\n" .
4999               "</div>";
5000         git_footer_html();
5001 }
5002
5003 sub git_snapshot {
5004         my $format = $input_params{'snapshot_format'};
5005         if (!@snapshot_fmts) {
5006                 die_error(403, "Snapshots not allowed");
5007         }
5008         # default to first supported snapshot format
5009         $format ||= $snapshot_fmts[0];
5010         if ($format !~ m/^[a-z0-9]+$/) {
5011                 die_error(400, "Invalid snapshot format parameter");
5012         } elsif (!exists($known_snapshot_formats{$format})) {
5013                 die_error(400, "Unknown snapshot format");
5014         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5015                 die_error(403, "Unsupported snapshot format");
5016         }
5017
5018         if (!defined $hash) {
5019                 $hash = git_get_head_hash($project);
5020         }
5021
5022         my $name = $project;
5023         $name =~ s,([^/])/*\.git$,$1,;
5024         $name = basename($name);
5025         my $filename = to_utf8($name);
5026         $name =~ s/\047/\047\\\047\047/g;
5027         my $cmd;
5028         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5029         $cmd = quote_command(
5030                 git_cmd(), 'archive',
5031                 "--format=$known_snapshot_formats{$format}{'format'}",
5032                 "--prefix=$name/", $hash);
5033         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5034                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5035         }
5036
5037         print $cgi->header(
5038                 -type => $known_snapshot_formats{$format}{'type'},
5039                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5040                 -status => '200 OK');
5041
5042         open my $fd, "-|", $cmd
5043                 or die_error(500, "Execute git-archive failed");
5044         binmode STDOUT, ':raw';
5045         print <$fd>;
5046         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5047         close $fd;
5048 }
5049
5050 sub git_log {
5051         my $head = git_get_head_hash($project);
5052         if (!defined $hash) {
5053                 $hash = $head;
5054         }
5055         if (!defined $page) {
5056                 $page = 0;
5057         }
5058         my $refs = git_get_references();
5059
5060         my @commitlist = parse_commits($hash, 101, (100 * $page));
5061
5062         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5063
5064         my ($patch_max) = gitweb_get_feature('patches');
5065         if ($patch_max) {
5066                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5067                         $paging_nav .= " &sdot; " .
5068                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5069                                         "patches");
5070                 }
5071         }
5072
5073         git_header_html();
5074         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5075
5076         if (!@commitlist) {
5077                 my %co = parse_commit($hash);
5078
5079                 git_print_header_div('summary', $project);
5080                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5081         }
5082         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5083         for (my $i = 0; $i <= $to; $i++) {
5084                 my %co = %{$commitlist[$i]};
5085                 next if !%co;
5086                 my $commit = $co{'id'};
5087                 my $ref = format_ref_marker($refs, $commit);
5088                 my %ad = parse_date($co{'author_epoch'});
5089                 git_print_header_div('commit',
5090                                "<span class=\"age\">$co{'age_string'}</span>" .
5091                                esc_html($co{'title'}) . $ref,
5092                                $commit);
5093                 print "<div class=\"title_text\">\n" .
5094                       "<div class=\"log_link\">\n" .
5095                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5096                       " | " .
5097                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5098                       " | " .
5099                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5100                       "<br/>\n" .
5101                       "</div>\n" .
5102                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5103                       "</div>\n";
5104
5105                 print "<div class=\"log_body\">\n";
5106                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5107                 print "</div>\n";
5108         }
5109         if ($#commitlist >= 100) {
5110                 print "<div class=\"page_nav\">\n";
5111                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5112                                -accesskey => "n", -title => "Alt-n"}, "next");
5113                 print "</div>\n";
5114         }
5115         git_footer_html();
5116 }
5117
5118 sub git_commit {
5119         $hash ||= $hash_base || "HEAD";
5120         my %co = parse_commit($hash)
5121             or die_error(404, "Unknown commit object");
5122         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5123         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5124
5125         my $parent  = $co{'parent'};
5126         my $parents = $co{'parents'}; # listref
5127
5128         # we need to prepare $formats_nav before any parameter munging
5129         my $formats_nav;
5130         if (!defined $parent) {
5131                 # --root commitdiff
5132                 $formats_nav .= '(initial)';
5133         } elsif (@$parents == 1) {
5134                 # single parent commit
5135                 $formats_nav .=
5136                         '(parent: ' .
5137                         $cgi->a({-href => href(action=>"commit",
5138                                                hash=>$parent)},
5139                                 esc_html(substr($parent, 0, 7))) .
5140                         ')';
5141         } else {
5142                 # merge commit
5143                 $formats_nav .=
5144                         '(merge: ' .
5145                         join(' ', map {
5146                                 $cgi->a({-href => href(action=>"commit",
5147                                                        hash=>$_)},
5148                                         esc_html(substr($_, 0, 7)));
5149                         } @$parents ) .
5150                         ')';
5151         }
5152         if (gitweb_check_feature('patches')) {
5153                 $formats_nav .= " | " .
5154                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5155                                 "patch");
5156         }
5157
5158         if (!defined $parent) {
5159                 $parent = "--root";
5160         }
5161         my @difftree;
5162         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5163                 @diff_opts,
5164                 (@$parents <= 1 ? $parent : '-c'),
5165                 $hash, "--"
5166                 or die_error(500, "Open git-diff-tree failed");
5167         @difftree = map { chomp; $_ } <$fd>;
5168         close $fd or die_error(404, "Reading git-diff-tree failed");
5169
5170         # non-textual hash id's can be cached
5171         my $expires;
5172         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5173                 $expires = "+1d";
5174         }
5175         my $refs = git_get_references();
5176         my $ref = format_ref_marker($refs, $co{'id'});
5177
5178         git_header_html(undef, $expires);
5179         git_print_page_nav('commit', '',
5180                            $hash, $co{'tree'}, $hash,
5181                            $formats_nav);
5182
5183         if (defined $co{'parent'}) {
5184                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5185         } else {
5186                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5187         }
5188         print "<div class=\"title_text\">\n" .
5189               "<table class=\"object_header\">\n";
5190         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5191               "<tr>" .
5192               "<td></td><td> $ad{'rfc2822'}";
5193         if ($ad{'hour_local'} < 6) {
5194                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5195                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5196         } else {
5197                 printf(" (%02d:%02d %s)",
5198                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5199         }
5200         print "</td>" .
5201               "</tr>\n";
5202         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5203         print "<tr><td></td><td> $cd{'rfc2822'}" .
5204               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5205               "</td></tr>\n";
5206         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5207         print "<tr>" .
5208               "<td>tree</td>" .
5209               "<td class=\"sha1\">" .
5210               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5211                        class => "list"}, $co{'tree'}) .
5212               "</td>" .
5213               "<td class=\"link\">" .
5214               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5215                       "tree");
5216         my $snapshot_links = format_snapshot_links($hash);
5217         if (defined $snapshot_links) {
5218                 print " | " . $snapshot_links;
5219         }
5220         print "</td>" .
5221               "</tr>\n";
5222
5223         foreach my $par (@$parents) {
5224                 print "<tr>" .
5225                       "<td>parent</td>" .
5226                       "<td class=\"sha1\">" .
5227                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5228                                class => "list"}, $par) .
5229                       "</td>" .
5230                       "<td class=\"link\">" .
5231                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5232                       " | " .
5233                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5234                       "</td>" .
5235                       "</tr>\n";
5236         }
5237         print "</table>".
5238               "</div>\n";
5239
5240         print "<div class=\"page_body\">\n";
5241         git_print_log($co{'comment'});
5242         print "</div>\n";
5243
5244         git_difftree_body(\@difftree, $hash, @$parents);
5245
5246         git_footer_html();
5247 }
5248
5249 sub git_object {
5250         # object is defined by:
5251         # - hash or hash_base alone
5252         # - hash_base and file_name
5253         my $type;
5254
5255         # - hash or hash_base alone
5256         if ($hash || ($hash_base && !defined $file_name)) {
5257                 my $object_id = $hash || $hash_base;
5258
5259                 open my $fd, "-|", quote_command(
5260                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5261                         or die_error(404, "Object does not exist");
5262                 $type = <$fd>;
5263                 chomp $type;
5264                 close $fd
5265                         or die_error(404, "Object does not exist");
5266
5267         # - hash_base and file_name
5268         } elsif ($hash_base && defined $file_name) {
5269                 $file_name =~ s,/+$,,;
5270
5271                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5272                         or die_error(404, "Base object does not exist");
5273
5274                 # here errors should not hapen
5275                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5276                         or die_error(500, "Open git-ls-tree failed");
5277                 my $line = <$fd>;
5278                 close $fd;
5279
5280                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5281                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5282                         die_error(404, "File or directory for given base does not exist");
5283                 }
5284                 $type = $2;
5285                 $hash = $3;
5286         } else {
5287                 die_error(400, "Not enough information to find object");
5288         }
5289
5290         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5291                                           hash=>$hash, hash_base=>$hash_base,
5292                                           file_name=>$file_name),
5293                              -status => '302 Found');
5294 }
5295
5296 sub git_blobdiff {
5297         my $format = shift || 'html';
5298
5299         my $fd;
5300         my @difftree;
5301         my %diffinfo;
5302         my $expires;
5303
5304         # preparing $fd and %diffinfo for git_patchset_body
5305         # new style URI
5306         if (defined $hash_base && defined $hash_parent_base) {
5307                 if (defined $file_name) {
5308                         # read raw output
5309                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5310                                 $hash_parent_base, $hash_base,
5311                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5312                                 or die_error(500, "Open git-diff-tree failed");
5313                         @difftree = map { chomp; $_ } <$fd>;
5314                         close $fd
5315                                 or die_error(404, "Reading git-diff-tree failed");
5316                         @difftree
5317                                 or die_error(404, "Blob diff not found");
5318
5319                 } elsif (defined $hash &&
5320                          $hash =~ /[0-9a-fA-F]{40}/) {
5321                         # try to find filename from $hash
5322
5323                         # read filtered raw output
5324                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5325                                 $hash_parent_base, $hash_base, "--"
5326                                 or die_error(500, "Open git-diff-tree failed");
5327                         @difftree =
5328                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5329                                 # $hash == to_id
5330                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5331                                 map { chomp; $_ } <$fd>;
5332                         close $fd
5333                                 or die_error(404, "Reading git-diff-tree failed");
5334                         @difftree
5335                                 or die_error(404, "Blob diff not found");
5336
5337                 } else {
5338                         die_error(400, "Missing one of the blob diff parameters");
5339                 }
5340
5341                 if (@difftree > 1) {
5342                         die_error(400, "Ambiguous blob diff specification");
5343                 }
5344
5345                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5346                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5347                 $file_name   ||= $diffinfo{'to_file'};
5348
5349                 $hash_parent ||= $diffinfo{'from_id'};
5350                 $hash        ||= $diffinfo{'to_id'};
5351
5352                 # non-textual hash id's can be cached
5353                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5354                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5355                         $expires = '+1d';
5356                 }
5357
5358                 # open patch output
5359                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5360                         '-p', ($format eq 'html' ? "--full-index" : ()),
5361                         $hash_parent_base, $hash_base,
5362                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5363                         or die_error(500, "Open git-diff-tree failed");
5364         }
5365
5366         # old/legacy style URI -- not generated anymore since 1.4.3.
5367         if (!%diffinfo) {
5368                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5369         }
5370
5371         # header
5372         if ($format eq 'html') {
5373                 my $formats_nav =
5374                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5375                                 "raw");
5376                 git_header_html(undef, $expires);
5377                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5378                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5379                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5380                 } else {
5381                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5382                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5383                 }
5384                 if (defined $file_name) {
5385                         git_print_page_path($file_name, "blob", $hash_base);
5386                 } else {
5387                         print "<div class=\"page_path\"></div>\n";
5388                 }
5389
5390         } elsif ($format eq 'plain') {
5391                 print $cgi->header(
5392                         -type => 'text/plain',
5393                         -charset => 'utf-8',
5394                         -expires => $expires,
5395                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5396
5397                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5398
5399         } else {
5400                 die_error(400, "Unknown blobdiff format");
5401         }
5402
5403         # patch
5404         if ($format eq 'html') {
5405                 print "<div class=\"page_body\">\n";
5406
5407                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5408                 close $fd;
5409
5410                 print "</div>\n"; # class="page_body"
5411                 git_footer_html();
5412
5413         } else {
5414                 while (my $line = <$fd>) {
5415                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5416                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5417
5418                         print $line;
5419
5420                         last if $line =~ m!^\+\+\+!;
5421                 }
5422                 local $/ = undef;
5423                 print <$fd>;
5424                 close $fd;
5425         }
5426 }
5427
5428 sub git_blobdiff_plain {
5429         git_blobdiff('plain');
5430 }
5431
5432 sub git_commitdiff {
5433         my %params = @_;
5434         my $format = $params{-format} || 'html';
5435
5436         my ($patch_max) = gitweb_get_feature('patches');
5437         if ($format eq 'patch') {
5438                 die_error(403, "Patch view not allowed") unless $patch_max;
5439         }
5440
5441         $hash ||= $hash_base || "HEAD";
5442         my %co = parse_commit($hash)
5443             or die_error(404, "Unknown commit object");
5444
5445         # choose format for commitdiff for merge
5446         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5447                 $hash_parent = '--cc';
5448         }
5449         # we need to prepare $formats_nav before almost any parameter munging
5450         my $formats_nav;
5451         if ($format eq 'html') {
5452                 $formats_nav =
5453                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5454                                 "raw");
5455                 if ($patch_max) {
5456                         $formats_nav .= " | " .
5457                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5458                                         "patch");
5459                 }
5460
5461                 if (defined $hash_parent &&
5462                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5463                         # commitdiff with two commits given
5464                         my $hash_parent_short = $hash_parent;
5465                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5466                                 $hash_parent_short = substr($hash_parent, 0, 7);
5467                         }
5468                         $formats_nav .=
5469                                 ' (from';
5470                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5471                                 if ($co{'parents'}[$i] eq $hash_parent) {
5472                                         $formats_nav .= ' parent ' . ($i+1);
5473                                         last;
5474                                 }
5475                         }
5476                         $formats_nav .= ': ' .
5477                                 $cgi->a({-href => href(action=>"commitdiff",
5478                                                        hash=>$hash_parent)},
5479                                         esc_html($hash_parent_short)) .
5480                                 ')';
5481                 } elsif (!$co{'parent'}) {
5482                         # --root commitdiff
5483                         $formats_nav .= ' (initial)';
5484                 } elsif (scalar @{$co{'parents'}} == 1) {
5485                         # single parent commit
5486                         $formats_nav .=
5487                                 ' (parent: ' .
5488                                 $cgi->a({-href => href(action=>"commitdiff",
5489                                                        hash=>$co{'parent'})},
5490                                         esc_html(substr($co{'parent'}, 0, 7))) .
5491                                 ')';
5492                 } else {
5493                         # merge commit
5494                         if ($hash_parent eq '--cc') {
5495                                 $formats_nav .= ' | ' .
5496                                         $cgi->a({-href => href(action=>"commitdiff",
5497                                                                hash=>$hash, hash_parent=>'-c')},
5498                                                 'combined');
5499                         } else { # $hash_parent eq '-c'
5500                                 $formats_nav .= ' | ' .
5501                                         $cgi->a({-href => href(action=>"commitdiff",
5502                                                                hash=>$hash, hash_parent=>'--cc')},
5503                                                 'compact');
5504                         }
5505                         $formats_nav .=
5506                                 ' (merge: ' .
5507                                 join(' ', map {
5508                                         $cgi->a({-href => href(action=>"commitdiff",
5509                                                                hash=>$_)},
5510                                                 esc_html(substr($_, 0, 7)));
5511                                 } @{$co{'parents'}} ) .
5512                                 ')';
5513                 }
5514         }
5515
5516         my $hash_parent_param = $hash_parent;
5517         if (!defined $hash_parent_param) {
5518                 # --cc for multiple parents, --root for parentless
5519                 $hash_parent_param =
5520                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5521         }
5522
5523         # read commitdiff
5524         my $fd;
5525         my @difftree;
5526         if ($format eq 'html') {
5527                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5528                         "--no-commit-id", "--patch-with-raw", "--full-index",
5529                         $hash_parent_param, $hash, "--"
5530                         or die_error(500, "Open git-diff-tree failed");
5531
5532                 while (my $line = <$fd>) {
5533                         chomp $line;
5534                         # empty line ends raw part of diff-tree output
5535                         last unless $line;
5536                         push @difftree, scalar parse_difftree_raw_line($line);
5537                 }
5538
5539         } elsif ($format eq 'plain') {
5540                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5541                         '-p', $hash_parent_param, $hash, "--"
5542                         or die_error(500, "Open git-diff-tree failed");
5543         } elsif ($format eq 'patch') {
5544                 # For commit ranges, we limit the output to the number of
5545                 # patches specified in the 'patches' feature.
5546                 # For single commits, we limit the output to a single patch,
5547                 # diverging from the git-format-patch default.
5548                 my @commit_spec = ();
5549                 if ($hash_parent) {
5550                         if ($patch_max > 0) {
5551                                 push @commit_spec, "-$patch_max";
5552                         }
5553                         push @commit_spec, '-n', "$hash_parent..$hash";
5554                 } else {
5555                         if ($params{-single}) {
5556                                 push @commit_spec, '-1';
5557                         } else {
5558                                 if ($patch_max > 0) {
5559                                         push @commit_spec, "-$patch_max";
5560                                 }
5561                                 push @commit_spec, "-n";
5562                         }
5563                         push @commit_spec, '--root', $hash;
5564                 }
5565                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5566                         '--stdout', @commit_spec
5567                         or die_error(500, "Open git-format-patch failed");
5568         } else {
5569                 die_error(400, "Unknown commitdiff format");
5570         }
5571
5572         # non-textual hash id's can be cached
5573         my $expires;
5574         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5575                 $expires = "+1d";
5576         }
5577
5578         # write commit message
5579         if ($format eq 'html') {
5580                 my $refs = git_get_references();
5581                 my $ref = format_ref_marker($refs, $co{'id'});
5582
5583                 git_header_html(undef, $expires);
5584                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5585                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5586                 git_print_authorship(\%co);
5587                 print "<div class=\"page_body\">\n";
5588                 if (@{$co{'comment'}} > 1) {
5589                         print "<div class=\"log\">\n";
5590                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5591                         print "</div>\n"; # class="log"
5592                 }
5593
5594         } elsif ($format eq 'plain') {
5595                 my $refs = git_get_references("tags");
5596                 my $tagname = git_get_rev_name_tags($hash);
5597                 my $filename = basename($project) . "-$hash.patch";
5598
5599                 print $cgi->header(
5600                         -type => 'text/plain',
5601                         -charset => 'utf-8',
5602                         -expires => $expires,
5603                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5604                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5605                 print "From: " . to_utf8($co{'author'}) . "\n";
5606                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5607                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5608
5609                 print "X-Git-Tag: $tagname\n" if $tagname;
5610                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5611
5612                 foreach my $line (@{$co{'comment'}}) {
5613                         print to_utf8($line) . "\n";
5614                 }
5615                 print "---\n\n";
5616         } elsif ($format eq 'patch') {
5617                 my $filename = basename($project) . "-$hash.patch";
5618
5619                 print $cgi->header(
5620                         -type => 'text/plain',
5621                         -charset => 'utf-8',
5622                         -expires => $expires,
5623                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5624         }
5625
5626         # write patch
5627         if ($format eq 'html') {
5628                 my $use_parents = !defined $hash_parent ||
5629                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5630                 git_difftree_body(\@difftree, $hash,
5631                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5632                 print "<br/>\n";
5633
5634                 git_patchset_body($fd, \@difftree, $hash,
5635                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5636                 close $fd;
5637                 print "</div>\n"; # class="page_body"
5638                 git_footer_html();
5639
5640         } elsif ($format eq 'plain') {
5641                 local $/ = undef;
5642                 print <$fd>;
5643                 close $fd
5644                         or print "Reading git-diff-tree failed\n";
5645         } elsif ($format eq 'patch') {
5646                 local $/ = undef;
5647                 print <$fd>;
5648                 close $fd
5649                         or print "Reading git-format-patch failed\n";
5650         }
5651 }
5652
5653 sub git_commitdiff_plain {
5654         git_commitdiff(-format => 'plain');
5655 }
5656
5657 # format-patch-style patches
5658 sub git_patch {
5659         git_commitdiff(-format => 'patch', -single=> 1);
5660 }
5661
5662 sub git_patches {
5663         git_commitdiff(-format => 'patch');
5664 }
5665
5666 sub git_history {
5667         if (!defined $hash_base) {
5668                 $hash_base = git_get_head_hash($project);
5669         }
5670         if (!defined $page) {
5671                 $page = 0;
5672         }
5673         my $ftype;
5674         my %co = parse_commit($hash_base)
5675             or die_error(404, "Unknown commit object");
5676
5677         my $refs = git_get_references();
5678         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5679
5680         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5681                                        $file_name, "--full-history")
5682             or die_error(404, "No such file or directory on given branch");
5683
5684         if (!defined $hash && defined $file_name) {
5685                 # some commits could have deleted file in question,
5686                 # and not have it in tree, but one of them has to have it
5687                 for (my $i = 0; $i <= @commitlist; $i++) {
5688                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5689                         last if defined $hash;
5690                 }
5691         }
5692         if (defined $hash) {
5693                 $ftype = git_get_type($hash);
5694         }
5695         if (!defined $ftype) {
5696                 die_error(500, "Unknown type of object");
5697         }
5698
5699         my $paging_nav = '';
5700         if ($page > 0) {
5701                 $paging_nav .=
5702                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5703                                                file_name=>$file_name)},
5704                                 "first");
5705                 $paging_nav .= " &sdot; " .
5706                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5707                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5708         } else {
5709                 $paging_nav .= "first";
5710                 $paging_nav .= " &sdot; prev";
5711         }
5712         my $next_link = '';
5713         if ($#commitlist >= 100) {
5714                 $next_link =
5715                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5716                                  -accesskey => "n", -title => "Alt-n"}, "next");
5717                 $paging_nav .= " &sdot; $next_link";
5718         } else {
5719                 $paging_nav .= " &sdot; next";
5720         }
5721
5722         git_header_html();
5723         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5724         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5725         git_print_page_path($file_name, $ftype, $hash_base);
5726
5727         git_history_body(\@commitlist, 0, 99,
5728                          $refs, $hash_base, $ftype, $next_link);
5729
5730         git_footer_html();
5731 }
5732
5733 sub git_search {
5734         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5735         if (!defined $searchtext) {
5736                 die_error(400, "Text field is empty");
5737         }
5738         if (!defined $hash) {
5739                 $hash = git_get_head_hash($project);
5740         }
5741         my %co = parse_commit($hash);
5742         if (!%co) {
5743                 die_error(404, "Unknown commit object");
5744         }
5745         if (!defined $page) {
5746                 $page = 0;
5747         }
5748
5749         $searchtype ||= 'commit';
5750         if ($searchtype eq 'pickaxe') {
5751                 # pickaxe may take all resources of your box and run for several minutes
5752                 # with every query - so decide by yourself how public you make this feature
5753                 gitweb_check_feature('pickaxe')
5754                     or die_error(403, "Pickaxe is disabled");
5755         }
5756         if ($searchtype eq 'grep') {
5757                 gitweb_check_feature('grep')[0]
5758                     or die_error(403, "Grep is disabled");
5759         }
5760
5761         git_header_html();
5762
5763         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5764                 my $greptype;
5765                 if ($searchtype eq 'commit') {
5766                         $greptype = "--grep=";
5767                 } elsif ($searchtype eq 'author') {
5768                         $greptype = "--author=";
5769                 } elsif ($searchtype eq 'committer') {
5770                         $greptype = "--committer=";
5771                 }
5772                 $greptype .= $searchtext;
5773                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5774                                                $greptype, '--regexp-ignore-case',
5775                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5776
5777                 my $paging_nav = '';
5778                 if ($page > 0) {
5779                         $paging_nav .=
5780                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5781                                                        searchtext=>$searchtext,
5782                                                        searchtype=>$searchtype)},
5783                                         "first");
5784                         $paging_nav .= " &sdot; " .
5785                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5786                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5787                 } else {
5788                         $paging_nav .= "first";
5789                         $paging_nav .= " &sdot; prev";
5790                 }
5791                 my $next_link = '';
5792                 if ($#commitlist >= 100) {
5793                         $next_link =
5794                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5795                                          -accesskey => "n", -title => "Alt-n"}, "next");
5796                         $paging_nav .= " &sdot; $next_link";
5797                 } else {
5798                         $paging_nav .= " &sdot; next";
5799                 }
5800
5801                 if ($#commitlist >= 100) {
5802                 }
5803
5804                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5805                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5806                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5807         }
5808
5809         if ($searchtype eq 'pickaxe') {
5810                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5811                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5812
5813                 print "<table class=\"pickaxe search\">\n";
5814                 my $alternate = 1;
5815                 $/ = "\n";
5816                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5817                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5818                         ($search_use_regexp ? '--pickaxe-regex' : ());
5819                 undef %co;
5820                 my @files;
5821                 while (my $line = <$fd>) {
5822                         chomp $line;
5823                         next unless $line;
5824
5825                         my %set = parse_difftree_raw_line($line);
5826                         if (defined $set{'commit'}) {
5827                                 # finish previous commit
5828                                 if (%co) {
5829                                         print "</td>\n" .
5830                                               "<td class=\"link\">" .
5831                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5832                                               " | " .
5833                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5834                                         print "</td>\n" .
5835                                               "</tr>\n";
5836                                 }
5837
5838                                 if ($alternate) {
5839                                         print "<tr class=\"dark\">\n";
5840                                 } else {
5841                                         print "<tr class=\"light\">\n";
5842                                 }
5843                                 $alternate ^= 1;
5844                                 %co = parse_commit($set{'commit'});
5845                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5846                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5847                                       "<td><i>$author</i></td>\n" .
5848                                       "<td>" .
5849                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5850                                               -class => "list subject"},
5851                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5852                         } elsif (defined $set{'to_id'}) {
5853                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5854
5855                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5856                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5857                                               -class => "list"},
5858                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5859                                       "<br/>\n";
5860                         }
5861                 }
5862                 close $fd;
5863
5864                 # finish last commit (warning: repetition!)
5865                 if (%co) {
5866                         print "</td>\n" .
5867                               "<td class=\"link\">" .
5868                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5869                               " | " .
5870                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5871                         print "</td>\n" .
5872                               "</tr>\n";
5873                 }
5874
5875                 print "</table>\n";
5876         }
5877
5878         if ($searchtype eq 'grep') {
5879                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5880                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5881
5882                 print "<table class=\"grep_search\">\n";
5883                 my $alternate = 1;
5884                 my $matches = 0;
5885                 $/ = "\n";
5886                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5887                         $search_use_regexp ? ('-E', '-i') : '-F',
5888                         $searchtext, $co{'tree'};
5889                 my $lastfile = '';
5890                 while (my $line = <$fd>) {
5891                         chomp $line;
5892                         my ($file, $lno, $ltext, $binary);
5893                         last if ($matches++ > 1000);
5894                         if ($line =~ /^Binary file (.+) matches$/) {
5895                                 $file = $1;
5896                                 $binary = 1;
5897                         } else {
5898                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5899                         }
5900                         if ($file ne $lastfile) {
5901                                 $lastfile and print "</td></tr>\n";
5902                                 if ($alternate++) {
5903                                         print "<tr class=\"dark\">\n";
5904                                 } else {
5905                                         print "<tr class=\"light\">\n";
5906                                 }
5907                                 print "<td class=\"list\">".
5908                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5909                                                                file_name=>"$file"),
5910                                                 -class => "list"}, esc_path($file));
5911                                 print "</td><td>\n";
5912                                 $lastfile = $file;
5913                         }
5914                         if ($binary) {
5915                                 print "<div class=\"binary\">Binary file</div>\n";
5916                         } else {
5917                                 $ltext = untabify($ltext);
5918                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5919                                         $ltext = esc_html($1, -nbsp=>1);
5920                                         $ltext .= '<span class="match">';
5921                                         $ltext .= esc_html($2, -nbsp=>1);
5922                                         $ltext .= '</span>';
5923                                         $ltext .= esc_html($3, -nbsp=>1);
5924                                 } else {
5925                                         $ltext = esc_html($ltext, -nbsp=>1);
5926                                 }
5927                                 print "<div class=\"pre\">" .
5928                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5929                                                                file_name=>"$file").'#l'.$lno,
5930                                                 -class => "linenr"}, sprintf('%4i', $lno))
5931                                         . ' ' .  $ltext . "</div>\n";
5932                         }
5933                 }
5934                 if ($lastfile) {
5935                         print "</td></tr>\n";
5936                         if ($matches > 1000) {
5937                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5938                         }
5939                 } else {
5940                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5941                 }
5942                 close $fd;
5943
5944                 print "</table>\n";
5945         }
5946         git_footer_html();
5947 }
5948
5949 sub git_search_help {
5950         git_header_html();
5951         git_print_page_nav('','', $hash,$hash,$hash);
5952         print <<EOT;
5953 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5954 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5955 the pattern entered is recognized as the POSIX extended
5956 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5957 insensitive).</p>
5958 <dl>
5959 <dt><b>commit</b></dt>
5960 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5961 EOT
5962         my $have_grep = gitweb_check_feature('grep');
5963         if ($have_grep) {
5964                 print <<EOT;
5965 <dt><b>grep</b></dt>
5966 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5967     a different one) are searched for the given pattern. On large trees, this search can take
5968 a while and put some strain on the server, so please use it with some consideration. Note that
5969 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5970 case-sensitive.</dd>
5971 EOT
5972         }
5973         print <<EOT;
5974 <dt><b>author</b></dt>
5975 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5976 <dt><b>committer</b></dt>
5977 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5978 EOT
5979         my $have_pickaxe = gitweb_check_feature('pickaxe');
5980         if ($have_pickaxe) {
5981                 print <<EOT;
5982 <dt><b>pickaxe</b></dt>
5983 <dd>All commits that caused the string to appear or disappear from any file (changes that
5984 added, removed or "modified" the string) will be listed. This search can take a while and
5985 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5986 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5987 EOT
5988         }
5989         print "</dl>\n";
5990         git_footer_html();
5991 }
5992
5993 sub git_shortlog {
5994         my $head = git_get_head_hash($project);
5995         if (!defined $hash) {
5996                 $hash = $head;
5997         }
5998         if (!defined $page) {
5999                 $page = 0;
6000         }
6001         my $refs = git_get_references();
6002
6003         my $commit_hash = $hash;
6004         if (defined $hash_parent) {
6005                 $commit_hash = "$hash_parent..$hash";
6006         }
6007         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6008
6009         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6010         my $next_link = '';
6011         if ($#commitlist >= 100) {
6012                 $next_link =
6013                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6014                                  -accesskey => "n", -title => "Alt-n"}, "next");
6015         }
6016         my $patch_max = gitweb_check_feature('patches');
6017         if ($patch_max) {
6018                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6019                         $paging_nav .= " &sdot; " .
6020                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6021                                         "patches");
6022                 }
6023         }
6024
6025         git_header_html();
6026         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6027         git_print_header_div('summary', $project);
6028
6029         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6030
6031         git_footer_html();
6032 }
6033
6034 ## ......................................................................
6035 ## feeds (RSS, Atom; OPML)
6036
6037 sub git_feed {
6038         my $format = shift || 'atom';
6039         my $have_blame = gitweb_check_feature('blame');
6040
6041         # Atom: http://www.atomenabled.org/developers/syndication/
6042         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6043         if ($format ne 'rss' && $format ne 'atom') {
6044                 die_error(400, "Unknown web feed format");
6045         }
6046
6047         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6048         my $head = $hash || 'HEAD';
6049         my @commitlist = parse_commits($head, 150, 0, $file_name);
6050
6051         my %latest_commit;
6052         my %latest_date;
6053         my $content_type = "application/$format+xml";
6054         if (defined $cgi->http('HTTP_ACCEPT') &&
6055                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6056                 # browser (feed reader) prefers text/xml
6057                 $content_type = 'text/xml';
6058         }
6059         if (defined($commitlist[0])) {
6060                 %latest_commit = %{$commitlist[0]};
6061                 my $latest_epoch = $latest_commit{'committer_epoch'};
6062                 %latest_date   = parse_date($latest_epoch);
6063                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6064                 if (defined $if_modified) {
6065                         my $since;
6066                         if (eval { require HTTP::Date; 1; }) {
6067                                 $since = HTTP::Date::str2time($if_modified);
6068                         } elsif (eval { require Time::ParseDate; 1; }) {
6069                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6070                         }
6071                         if (defined $since && $latest_epoch <= $since) {
6072                                 print $cgi->header(
6073                                         -type => $content_type,
6074                                         -charset => 'utf-8',
6075                                         -last_modified => $latest_date{'rfc2822'},
6076                                         -status => '304 Not Modified');
6077                                 return;
6078                         }
6079                 }
6080                 print $cgi->header(
6081                         -type => $content_type,
6082                         -charset => 'utf-8',
6083                         -last_modified => $latest_date{'rfc2822'});
6084         } else {
6085                 print $cgi->header(
6086                         -type => $content_type,
6087                         -charset => 'utf-8');
6088         }
6089
6090         # Optimization: skip generating the body if client asks only
6091         # for Last-Modified date.
6092         return if ($cgi->request_method() eq 'HEAD');
6093
6094         # header variables
6095         my $title = "$site_name - $project/$action";
6096         my $feed_type = 'log';
6097         if (defined $hash) {
6098                 $title .= " - '$hash'";
6099                 $feed_type = 'branch log';
6100                 if (defined $file_name) {
6101                         $title .= " :: $file_name";
6102                         $feed_type = 'history';
6103                 }
6104         } elsif (defined $file_name) {
6105                 $title .= " - $file_name";
6106                 $feed_type = 'history';
6107         }
6108         $title .= " $feed_type";
6109         my $descr = git_get_project_description($project);
6110         if (defined $descr) {
6111                 $descr = esc_html($descr);
6112         } else {
6113                 $descr = "$project " .
6114                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6115                          " feed";
6116         }
6117         my $owner = git_get_project_owner($project);
6118         $owner = esc_html($owner);
6119
6120         #header
6121         my $alt_url;
6122         if (defined $file_name) {
6123                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6124         } elsif (defined $hash) {
6125                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6126         } else {
6127                 $alt_url = href(-full=>1, action=>"summary");
6128         }
6129         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6130         if ($format eq 'rss') {
6131                 print <<XML;
6132 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6133 <channel>
6134 XML
6135                 print "<title>$title</title>\n" .
6136                       "<link>$alt_url</link>\n" .
6137                       "<description>$descr</description>\n" .
6138                       "<language>en</language>\n" .
6139                       # project owner is responsible for 'editorial' content
6140                       "<managingEditor>$owner</managingEditor>\n";
6141                 if (defined $logo || defined $favicon) {
6142                         # prefer the logo to the favicon, since RSS
6143                         # doesn't allow both
6144                         my $img = esc_url($logo || $favicon);
6145                         print "<image>\n" .
6146                               "<url>$img</url>\n" .
6147                               "<title>$title</title>\n" .
6148                               "<link>$alt_url</link>\n" .
6149                               "</image>\n";
6150                 }
6151                 if (%latest_date) {
6152                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6153                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6154                 }
6155                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6156         } elsif ($format eq 'atom') {
6157                 print <<XML;
6158 <feed xmlns="http://www.w3.org/2005/Atom">
6159 XML
6160                 print "<title>$title</title>\n" .
6161                       "<subtitle>$descr</subtitle>\n" .
6162                       '<link rel="alternate" type="text/html" href="' .
6163                       $alt_url . '" />' . "\n" .
6164                       '<link rel="self" type="' . $content_type . '" href="' .
6165                       $cgi->self_url() . '" />' . "\n" .
6166                       "<id>" . href(-full=>1) . "</id>\n" .
6167                       # use project owner for feed author
6168                       "<author><name>$owner</name></author>\n";
6169                 if (defined $favicon) {
6170                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6171                 }
6172                 if (defined $logo_url) {
6173                         # not twice as wide as tall: 72 x 27 pixels
6174                         print "<logo>" . esc_url($logo) . "</logo>\n";
6175                 }
6176                 if (! %latest_date) {
6177                         # dummy date to keep the feed valid until commits trickle in:
6178                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6179                 } else {
6180                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6181                 }
6182                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6183         }
6184
6185         # contents
6186         for (my $i = 0; $i <= $#commitlist; $i++) {
6187                 my %co = %{$commitlist[$i]};
6188                 my $commit = $co{'id'};
6189                 # we read 150, we always show 30 and the ones more recent than 48 hours
6190                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6191                         last;
6192                 }
6193                 my %cd = parse_date($co{'author_epoch'});
6194
6195                 # get list of changed files
6196                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6197                         $co{'parent'} || "--root",
6198                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6199                         or next;
6200                 my @difftree = map { chomp; $_ } <$fd>;
6201                 close $fd
6202                         or next;
6203
6204                 # print element (entry, item)
6205                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6206                 if ($format eq 'rss') {
6207                         print "<item>\n" .
6208                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6209                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6210                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6211                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6212                               "<link>$co_url</link>\n" .
6213                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6214                               "<content:encoded>" .
6215                               "<![CDATA[\n";
6216                 } elsif ($format eq 'atom') {
6217                         print "<entry>\n" .
6218                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6219                               "<updated>$cd{'iso-8601'}</updated>\n" .
6220                               "<author>\n" .
6221                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6222                         if ($co{'author_email'}) {
6223                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6224                         }
6225                         print "</author>\n" .
6226                               # use committer for contributor
6227                               "<contributor>\n" .
6228                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6229                         if ($co{'committer_email'}) {
6230                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6231                         }
6232                         print "</contributor>\n" .
6233                               "<published>$cd{'iso-8601'}</published>\n" .
6234                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6235                               "<id>$co_url</id>\n" .
6236                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6237                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6238                 }
6239                 my $comment = $co{'comment'};
6240                 print "<pre>\n";
6241                 foreach my $line (@$comment) {
6242                         $line = esc_html($line);
6243                         print "$line\n";
6244                 }
6245                 print "</pre><ul>\n";
6246                 foreach my $difftree_line (@difftree) {
6247                         my %difftree = parse_difftree_raw_line($difftree_line);
6248                         next if !$difftree{'from_id'};
6249
6250                         my $file = $difftree{'file'} || $difftree{'to_file'};
6251
6252                         print "<li>" .
6253                               "[" .
6254                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6255                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6256                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6257                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6258                                       -title => "diff"}, 'D');
6259                         if ($have_blame) {
6260                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6261                                                              file_name=>$file, hash_base=>$commit),
6262                                               -title => "blame"}, 'B');
6263                         }
6264                         # if this is not a feed of a file history
6265                         if (!defined $file_name || $file_name ne $file) {
6266                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6267                                                              file_name=>$file, hash=>$commit),
6268                                               -title => "history"}, 'H');
6269                         }
6270                         $file = esc_path($file);
6271                         print "] ".
6272                               "$file</li>\n";
6273                 }
6274                 if ($format eq 'rss') {
6275                         print "</ul>]]>\n" .
6276                               "</content:encoded>\n" .
6277                               "</item>\n";
6278                 } elsif ($format eq 'atom') {
6279                         print "</ul>\n</div>\n" .
6280                               "</content>\n" .
6281                               "</entry>\n";
6282                 }
6283         }
6284
6285         # end of feed
6286         if ($format eq 'rss') {
6287                 print "</channel>\n</rss>\n";
6288         }       elsif ($format eq 'atom') {
6289                 print "</feed>\n";
6290         }
6291 }
6292
6293 sub git_rss {
6294         git_feed('rss');
6295 }
6296
6297 sub git_atom {
6298         git_feed('atom');
6299 }
6300
6301 sub git_opml {
6302         my @list = git_get_projects_list();
6303
6304         print $cgi->header(
6305                 -type => 'text/xml',
6306                 -charset => 'utf-8',
6307                 -content_disposition => 'inline; filename="opml.xml"');
6308
6309         print <<XML;
6310 <?xml version="1.0" encoding="utf-8"?>
6311 <opml version="1.0">
6312 <head>
6313   <title>$site_name OPML Export</title>
6314 </head>
6315 <body>
6316 <outline text="git RSS feeds">
6317 XML
6318
6319         foreach my $pr (@list) {
6320                 my %proj = %$pr;
6321                 my $head = git_get_head_hash($proj{'path'});
6322                 if (!defined $head) {
6323                         next;
6324                 }
6325                 $git_dir = "$projectroot/$proj{'path'}";
6326                 my %co = parse_commit($head);
6327                 if (!%co) {
6328                         next;
6329                 }
6330
6331                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6332                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6333                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6334                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6335         }
6336         print <<XML;
6337 </outline>
6338 </body>
6339 </opml>
6340 XML
6341 }