gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($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 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # You define site-wide feature defaults here; override them with
 199 # $GITWEB_CONFIG as necessary.
 200 our %feature = (
 201         # feature => {
 202         #       'sub' => feature-sub (subroutine),
 203         #       'override' => allow-override (boolean),
 204         #       'default' => [ default options...] (array reference)}
 205         #
 206         # if feature is overridable (it means that allow-override has true value),
 207         # then feature-sub will be called with default options as parameters;
 208         # return value of feature-sub indicates if to enable specified feature
 209         #
 210         # if there is no 'sub' key (no feature-sub), then feature cannot be
 211         # overriden
 212         #
 213         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 214         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 215         # is enabled
 216
 217         # Enable the 'blame' blob view, showing the last commit that modified
 218         # each line in the file. This can be very CPU-intensive.
 219
 220         # To enable system wide have in $GITWEB_CONFIG
 221         # $feature{'blame'}{'default'} = [1];
 222         # To have project specific config enable override in $GITWEB_CONFIG
 223         # $feature{'blame'}{'override'} = 1;
 224         # and in project config gitweb.blame = 0|1;
 225         'blame' => {
 226                 'sub' => sub { feature_bool('blame', @_) },
 227                 'override' => 0,
 228                 'default' => [0]},
 229
 230         # Enable the 'snapshot' link, providing a compressed archive of any
 231         # tree. This can potentially generate high traffic if you have large
 232         # project.
 233
 234         # Value is a list of formats defined in %known_snapshot_formats that
 235         # you wish to offer.
 236         # To disable system wide have in $GITWEB_CONFIG
 237         # $feature{'snapshot'}{'default'} = [];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'snapshot'}{'override'} = 1;
 240         # and in project config, a comma-separated list of formats or "none"
 241         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 242         'snapshot' => {
 243                 'sub' => \&feature_snapshot,
 244                 'override' => 0,
 245                 'default' => ['tgz']},
 246
 247         # Enable text search, which will list the commits which match author,
 248         # committer or commit text to a given string.  Enabled by default.
 249         # Project specific override is not supported.
 250         'search' => {
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Enable grep search, which will list the files in currently selected
 255         # tree containing the given string. Enabled by default. This can be
 256         # potentially CPU-intensive, of course.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'grep'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'grep'}{'override'} = 1;
 262         # and in project config gitweb.grep = 0|1;
 263         'grep' => {
 264                 'sub' => sub { feature_bool('grep', @_) },
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable the pickaxe search, which will list the commits that modified
 269         # a given string in a file. This can be practical and quite faster
 270         # alternative to 'blame', but still potentially CPU-intensive.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'pickaxe'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'pickaxe'}{'override'} = 1;
 276         # and in project config gitweb.pickaxe = 0|1;
 277         'pickaxe' => {
 278                 'sub' => sub { feature_bool('pickaxe', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Make gitweb use an alternative format of the URLs which can be
 283         # more readable and natural-looking: project name is embedded
 284         # directly in the path and the query string contains other
 285         # auxiliary information. All gitweb installations recognize
 286         # URL in either format; this configures in which formats gitweb
 287         # generates links.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'pathinfo'}{'default'} = [1];
 291         # Project specific override is not supported.
 292
 293         # Note that you will need to change the default location of CSS,
 294         # favicon, logo and possibly other files to an absolute URL. Also,
 295         # if gitweb.cgi serves as your indexfile, you will need to force
 296         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 297         'pathinfo' => {
 298                 'override' => 0,
 299                 'default' => [0]},
 300
 301         # Make gitweb consider projects in project root subdirectories
 302         # to be forks of existing projects. Given project $projname.git,
 303         # projects matching $projname/*.git will not be shown in the main
 304         # projects list, instead a '+' mark will be added to $projname
 305         # there and a 'forks' view will be enabled for the project, listing
 306         # all the forks. If project list is taken from a file, forks have
 307         # to be listed after the main project.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'forks'}{'default'} = [1];
 311         # Project specific override is not supported.
 312         'forks' => {
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Insert custom links to the action bar of all project pages.
 317         # This enables you mainly to link to third-party scripts integrating
 318         # into gitweb; e.g. git-browser for graphical history representation
 319         # or custom web-based repository administration interface.
 320
 321         # The 'default' value consists of a list of triplets in the form
 322         # (label, link, position) where position is the label after which
 323         # to insert the link and link is a format string where %n expands
 324         # to the project name, %f to the project path within the filesystem,
 325         # %h to the current hash (h gitweb parameter) and %b to the current
 326         # hash base (hb gitweb parameter); %% expands to %.
 327
 328         # To enable system wide have in $GITWEB_CONFIG e.g.
 329         # $feature{'actions'}{'default'} = [('graphiclog',
 330         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 331         # Project specific override is not supported.
 332         'actions' => {
 333                 'override' => 0,
 334                 'default' => []},
 335
 336         # Allow gitweb scan project content tags described in ctags/
 337         # of project repository, and display the popular Web 2.0-ish
 338         # "tag cloud" near the project list. Note that this is something
 339         # COMPLETELY different from the normal Git tags.
 340
 341         # gitweb by itself can show existing tags, but it does not handle
 342         # tagging itself; you need an external application for that.
 343         # For an example script, check Girocco's cgi/tagproj.cgi.
 344         # You may want to install the HTML::TagCloud Perl module to get
 345         # a pretty tag cloud instead of just a list of tags.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 349         # Project specific override is not supported.
 350         'ctags' => {
 351                 'override' => 0,
 352                 'default' => [0]},
 353
 354         # The maximum number of patches in a patchset generated in patch
 355         # view. Set this to 0 or undef to disable patch view, or to a
 356         # negative number to remove any limit.
 357
 358         # To disable system wide have in $GITWEB_CONFIG
 359         # $feature{'patches'}{'default'} = [0];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'patches'}{'override'} = 1;
 362         # and in project config gitweb.patches = 0|n;
 363         # where n is the maximum number of patches allowed in a patchset.
 364         'patches' => {
 365                 'sub' => \&feature_patches,
 366                 'override' => 0,
 367                 'default' => [16]},
 368 );
 369
 370 sub gitweb_get_feature {
 371         my ($name) = @_;
 372         return unless exists $feature{$name};
 373         my ($sub, $override, @defaults) = (
 374                 $feature{$name}{'sub'},
 375                 $feature{$name}{'override'},
 376                 @{$feature{$name}{'default'}});
 377         if (!$override) { return @defaults; }
 378         if (!defined $sub) {
 379                 warn "feature $name is not overrideable";
 380                 return @defaults;
 381         }
 382         return $sub->(@defaults);
 383 }
 384
 385 # A wrapper to check if a given feature is enabled.
 386 # With this, you can say
 387 #
 388 #   my $bool_feat = gitweb_check_feature('bool_feat');
 389 #   gitweb_check_feature('bool_feat') or somecode;
 390 #
 391 # instead of
 392 #
 393 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 394 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 395 #
 396 sub gitweb_check_feature {
 397         return (gitweb_get_feature(@_))[0];
 398 }
 399
 400
 401 sub feature_bool {
 402         my $key = shift;
 403         my ($val) = git_get_project_config($key, '--bool');
 404
 405         if (!defined $val) {
 406                 return ($_[0]);
 407         } elsif ($val eq 'true') {
 408                 return (1);
 409         } elsif ($val eq 'false') {
 410                 return (0);
 411         }
 412 }
 413
 414 sub feature_snapshot {
 415         my (@fmts) = @_;
 416
 417         my ($val) = git_get_project_config('snapshot');
 418
 419         if ($val) {
 420                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 421         }
 422
 423         return @fmts;
 424 }
 425
 426 sub feature_patches {
 427         my @val = (git_get_project_config('patches', '--int'));
 428
 429         if (@val) {
 430                 return @val;
 431         }
 432
 433         return ($_[0]);
 434 }
 435
 436 # checking HEAD file with -e is fragile if the repository was
 437 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 438 # and then pruned.
 439 sub check_head_link {
 440         my ($dir) = @_;
 441         my $headfile = "$dir/HEAD";
 442         return ((-e $headfile) ||
 443                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 444 }
 445
 446 sub check_export_ok {
 447         my ($dir) = @_;
 448         return (check_head_link($dir) &&
 449                 (!$export_ok || -e "$dir/$export_ok") &&
 450                 (!$export_auth_hook || $export_auth_hook->($dir)));
 451 }
 452
 453 # process alternate names for backward compatibility
 454 # filter out unsupported (unknown) snapshot formats
 455 sub filter_snapshot_fmts {
 456         my @fmts = @_;
 457
 458         @fmts = map {
 459                 exists $known_snapshot_format_aliases{$_} ?
 460                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 461         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 462
 463 }
 464
 465 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 466 if (-e $GITWEB_CONFIG) {
 467         do $GITWEB_CONFIG;
 468 } else {
 469         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 470         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 471 }
 472
 473 # version of the core git binary
 474 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 475
 476 $projects_list ||= $projectroot;
 477
 478 # ======================================================================
 479 # input validation and dispatch
 480
 481 # input parameters can be collected from a variety of sources (presently, CGI
 482 # and PATH_INFO), so we define an %input_params hash that collects them all
 483 # together during validation: this allows subsequent uses (e.g. href()) to be
 484 # agnostic of the parameter origin
 485
 486 our %input_params = ();
 487
 488 # input parameters are stored with the long parameter name as key. This will
 489 # also be used in the href subroutine to convert parameters to their CGI
 490 # equivalent, and since the href() usage is the most frequent one, we store
 491 # the name -> CGI key mapping here, instead of the reverse.
 492 #
 493 # XXX: Warning: If you touch this, check the search form for updating,
 494 # too.
 495
 496 our @cgi_param_mapping = (
 497         project => "p",
 498         action => "a",
 499         file_name => "f",
 500         file_parent => "fp",
 501         hash => "h",
 502         hash_parent => "hp",
 503         hash_base => "hb",
 504         hash_parent_base => "hpb",
 505         page => "pg",
 506         order => "o",
 507         searchtext => "s",
 508         searchtype => "st",
 509         snapshot_format => "sf",
 510         extra_options => "opt",
 511         search_use_regexp => "sr",
 512 );
 513 our %cgi_param_mapping = @cgi_param_mapping;
 514
 515 # we will also need to know the possible actions, for validation
 516 our %actions = (
 517         "blame" => \&git_blame,
 518         "blobdiff" => \&git_blobdiff,
 519         "blobdiff_plain" => \&git_blobdiff_plain,
 520         "blob" => \&git_blob,
 521         "blob_plain" => \&git_blob_plain,
 522         "commitdiff" => \&git_commitdiff,
 523         "commitdiff_plain" => \&git_commitdiff_plain,
 524         "commit" => \&git_commit,
 525         "forks" => \&git_forks,
 526         "heads" => \&git_heads,
 527         "history" => \&git_history,
 528         "log" => \&git_log,
 529         "patch" => \&git_patch,
 530         "patches" => \&git_patches,
 531         "rss" => \&git_rss,
 532         "atom" => \&git_atom,
 533         "search" => \&git_search,
 534         "search_help" => \&git_search_help,
 535         "shortlog" => \&git_shortlog,
 536         "summary" => \&git_summary,
 537         "tag" => \&git_tag,
 538         "tags" => \&git_tags,
 539         "tree" => \&git_tree,
 540         "snapshot" => \&git_snapshot,
 541         "object" => \&git_object,
 542         # those below don't need $project
 543         "opml" => \&git_opml,
 544         "project_list" => \&git_project_list,
 545         "project_index" => \&git_project_index,
 546 );
 547
 548 # finally, we have the hash of allowed extra_options for the commands that
 549 # allow them
 550 our %allowed_options = (
 551         "--no-merges" => [ qw(rss atom log shortlog history) ],
 552 );
 553
 554 # fill %input_params with the CGI parameters. All values except for 'opt'
 555 # should be single values, but opt can be an array. We should probably
 556 # build an array of parameters that can be multi-valued, but since for the time
 557 # being it's only this one, we just single it out
 558 while (my ($name, $symbol) = each %cgi_param_mapping) {
 559         if ($symbol eq 'opt') {
 560                 $input_params{$name} = [ $cgi->param($symbol) ];
 561         } else {
 562                 $input_params{$name} = $cgi->param($symbol);
 563         }
 564 }
 565
 566 # now read PATH_INFO and update the parameter list for missing parameters
 567 sub evaluate_path_info {
 568         return if defined $input_params{'project'};
 569         return if !$path_info;
 570         $path_info =~ s,^/+,,;
 571         return if !$path_info;
 572
 573         # find which part of PATH_INFO is project
 574         my $project = $path_info;
 575         $project =~ s,/+$,,;
 576         while ($project && !check_head_link("$projectroot/$project")) {
 577                 $project =~ s,/*[^/]*$,,;
 578         }
 579         return unless $project;
 580         $input_params{'project'} = $project;
 581
 582         # do not change any parameters if an action is given using the query string
 583         return if $input_params{'action'};
 584         $path_info =~ s,^\Q$project\E/*,,;
 585
 586         # next, check if we have an action
 587         my $action = $path_info;
 588         $action =~ s,/.*$,,;
 589         if (exists $actions{$action}) {
 590                 $path_info =~ s,^$action/*,,;
 591                 $input_params{'action'} = $action;
 592         }
 593
 594         # list of actions that want hash_base instead of hash, but can have no
 595         # pathname (f) parameter
 596         my @wants_base = (
 597                 'tree',
 598                 'history',
 599         );
 600
 601         # we want to catch
 602         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 603         my ($parentrefname, $parentpathname, $refname, $pathname) =
 604                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 605
 606         # first, analyze the 'current' part
 607         if (defined $pathname) {
 608                 # we got "branch:filename" or "branch:dir/"
 609                 # we could use git_get_type(branch:pathname), but:
 610                 # - it needs $git_dir
 611                 # - it does a git() call
 612                 # - the convention of terminating directories with a slash
 613                 #   makes it superfluous
 614                 # - embedding the action in the PATH_INFO would make it even
 615                 #   more superfluous
 616                 $pathname =~ s,^/+,,;
 617                 if (!$pathname || substr($pathname, -1) eq "/") {
 618                         $input_params{'action'} ||= "tree";
 619                         $pathname =~ s,/$,,;
 620                 } else {
 621                         # the default action depends on whether we had parent info
 622                         # or not
 623                         if ($parentrefname) {
 624                                 $input_params{'action'} ||= "blobdiff_plain";
 625                         } else {
 626                                 $input_params{'action'} ||= "blob_plain";
 627                         }
 628                 }
 629                 $input_params{'hash_base'} ||= $refname;
 630                 $input_params{'file_name'} ||= $pathname;
 631         } elsif (defined $refname) {
 632                 # we got "branch". In this case we have to choose if we have to
 633                 # set hash or hash_base.
 634                 #
 635                 # Most of the actions without a pathname only want hash to be
 636                 # set, except for the ones specified in @wants_base that want
 637                 # hash_base instead. It should also be noted that hand-crafted
 638                 # links having 'history' as an action and no pathname or hash
 639                 # set will fail, but that happens regardless of PATH_INFO.
 640                 $input_params{'action'} ||= "shortlog";
 641                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 642                         $input_params{'hash_base'} ||= $refname;
 643                 } else {
 644                         $input_params{'hash'} ||= $refname;
 645                 }
 646         }
 647
 648         # next, handle the 'parent' part, if present
 649         if (defined $parentrefname) {
 650                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 651                 # someproject/blobdiff/oldrev..newrev:/filename
 652                 if ($parentpathname) {
 653                         $parentpathname =~ s,^/+,,;
 654                         $parentpathname =~ s,/$,,;
 655                         $input_params{'file_parent'} ||= $parentpathname;
 656                 } else {
 657                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 658                 }
 659                 # we assume that hash_parent_base is wanted if a path was specified,
 660                 # or if the action wants hash_base instead of hash
 661                 if (defined $input_params{'file_parent'} ||
 662                         grep { $_ eq $input_params{'action'} } @wants_base) {
 663                         $input_params{'hash_parent_base'} ||= $parentrefname;
 664                 } else {
 665                         $input_params{'hash_parent'} ||= $parentrefname;
 666                 }
 667         }
 668
 669         # for the snapshot action, we allow URLs in the form
 670         # $project/snapshot/$hash.ext
 671         # where .ext determines the snapshot and gets removed from the
 672         # passed $refname to provide the $hash.
 673         #
 674         # To be able to tell that $refname includes the format extension, we
 675         # require the following two conditions to be satisfied:
 676         # - the hash input parameter MUST have been set from the $refname part
 677         #   of the URL (i.e. they must be equal)
 678         # - the snapshot format MUST NOT have been defined already (e.g. from
 679         #   CGI parameter sf)
 680         # It's also useless to try any matching unless $refname has a dot,
 681         # so we check for that too
 682         if (defined $input_params{'action'} &&
 683                 $input_params{'action'} eq 'snapshot' &&
 684                 defined $refname && index($refname, '.') != -1 &&
 685                 $refname eq $input_params{'hash'} &&
 686                 !defined $input_params{'snapshot_format'}) {
 687                 # We loop over the known snapshot formats, checking for
 688                 # extensions. Allowed extensions are both the defined suffix
 689                 # (which includes the initial dot already) and the snapshot
 690                 # format key itself, with a prepended dot
 691                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 692                         my $hash = $refname;
 693                         my $sfx;
 694                         $hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//;
 695                         next unless $sfx = $1;
 696                         # a valid suffix was found, so set the snapshot format
 697                         # and reset the hash parameter
 698                         $input_params{'snapshot_format'} = $fmt;
 699                         $input_params{'hash'} = $hash;
 700                         # we also set the format suffix to the one requested
 701                         # in the URL: this way a request for e.g. .tgz returns
 702                         # a .tgz instead of a .tar.gz
 703                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 704                         last;
 705                 }
 706         }
 707 }
 708 evaluate_path_info();
 709
 710 our $action = $input_params{'action'};
 711 if (defined $action) {
 712         if (!validate_action($action)) {
 713                 die_error(400, "Invalid action parameter");
 714         }
 715 }
 716
 717 # parameters which are pathnames
 718 our $project = $input_params{'project'};
 719 if (defined $project) {
 720         if (!validate_project($project)) {
 721                 undef $project;
 722                 die_error(404, "No such project");
 723         }
 724 }
 725
 726 our $file_name = $input_params{'file_name'};
 727 if (defined $file_name) {
 728         if (!validate_pathname($file_name)) {
 729                 die_error(400, "Invalid file parameter");
 730         }
 731 }
 732
 733 our $file_parent = $input_params{'file_parent'};
 734 if (defined $file_parent) {
 735         if (!validate_pathname($file_parent)) {
 736                 die_error(400, "Invalid file parent parameter");
 737         }
 738 }
 739
 740 # parameters which are refnames
 741 our $hash = $input_params{'hash'};
 742 if (defined $hash) {
 743         if (!validate_refname($hash)) {
 744                 die_error(400, "Invalid hash parameter");
 745         }
 746 }
 747
 748 our $hash_parent = $input_params{'hash_parent'};
 749 if (defined $hash_parent) {
 750         if (!validate_refname($hash_parent)) {
 751                 die_error(400, "Invalid hash parent parameter");
 752         }
 753 }
 754
 755 our $hash_base = $input_params{'hash_base'};
 756 if (defined $hash_base) {
 757         if (!validate_refname($hash_base)) {
 758                 die_error(400, "Invalid hash base parameter");
 759         }
 760 }
 761
 762 our @extra_options = @{$input_params{'extra_options'}};
 763 # @extra_options is always defined, since it can only be (currently) set from
 764 # CGI, and $cgi->param() returns the empty array in array context if the param
 765 # is not set
 766 foreach my $opt (@extra_options) {
 767         if (not exists $allowed_options{$opt}) {
 768                 die_error(400, "Invalid option parameter");
 769         }
 770         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 771                 die_error(400, "Invalid option parameter for this action");
 772         }
 773 }
 774
 775 our $hash_parent_base = $input_params{'hash_parent_base'};
 776 if (defined $hash_parent_base) {
 777         if (!validate_refname($hash_parent_base)) {
 778                 die_error(400, "Invalid hash parent base parameter");
 779         }
 780 }
 781
 782 # other parameters
 783 our $page = $input_params{'page'};
 784 if (defined $page) {
 785         if ($page =~ m/[^0-9]/) {
 786                 die_error(400, "Invalid page parameter");
 787         }
 788 }
 789
 790 our $searchtype = $input_params{'searchtype'};
 791 if (defined $searchtype) {
 792         if ($searchtype =~ m/[^a-z]/) {
 793                 die_error(400, "Invalid searchtype parameter");
 794         }
 795 }
 796
 797 our $search_use_regexp = $input_params{'search_use_regexp'};
 798
 799 our $searchtext = $input_params{'searchtext'};
 800 our $search_regexp;
 801 if (defined $searchtext) {
 802         if (length($searchtext) < 2) {
 803                 die_error(403, "At least two characters are required for search parameter");
 804         }
 805         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 806 }
 807
 808 # path to the current git repository
 809 our $git_dir;
 810 $git_dir = "$projectroot/$project" if $project;
 811
 812 # list of supported snapshot formats
 813 our @snapshot_fmts = gitweb_get_feature('snapshot');
 814 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 815
 816 # dispatch
 817 if (!defined $action) {
 818         if (defined $hash) {
 819                 $action = git_get_type($hash);
 820         } elsif (defined $hash_base && defined $file_name) {
 821                 $action = git_get_type("$hash_base:$file_name");
 822         } elsif (defined $project) {
 823                 $action = 'summary';
 824         } else {
 825                 $action = 'project_list';
 826         }
 827 }
 828 if (!defined($actions{$action})) {
 829         die_error(400, "Unknown action");
 830 }
 831 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 832     !$project) {
 833         die_error(400, "Project needed");
 834 }
 835 $actions{$action}->();
 836 exit;
 837
 838 ## ======================================================================
 839 ## action links
 840
 841 sub href {
 842         my %params = @_;
 843         # default is to use -absolute url() i.e. $my_uri
 844         my $href = $params{-full} ? $my_url : $my_uri;
 845
 846         $params{'project'} = $project unless exists $params{'project'};
 847
 848         if ($params{-replay}) {
 849                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 850                         if (!exists $params{$name}) {
 851                                 $params{$name} = $input_params{$name};
 852                         }
 853                 }
 854         }
 855
 856         my $use_pathinfo = gitweb_check_feature('pathinfo');
 857         if ($use_pathinfo and defined $params{'project'}) {
 858                 # try to put as many parameters as possible in PATH_INFO:
 859                 #   - project name
 860                 #   - action
 861                 #   - hash_parent or hash_parent_base:/file_parent
 862                 #   - hash or hash_base:/filename
 863                 #   - the snapshot_format as an appropriate suffix
 864
 865                 # When the script is the root DirectoryIndex for the domain,
 866                 # $href here would be something like http://gitweb.example.com/
 867                 # Thus, we strip any trailing / from $href, to spare us double
 868                 # slashes in the final URL
 869                 $href =~ s,/$,,;
 870
 871                 # Then add the project name, if present
 872                 $href .= "/".esc_url($params{'project'});
 873                 delete $params{'project'};
 874
 875                 # since we destructively absorb parameters, we keep this
 876                 # boolean that remembers if we're handling a snapshot
 877                 my $is_snapshot = $params{'action'} eq 'snapshot';
 878
 879                 # Summary just uses the project path URL, any other action is
 880                 # added to the URL
 881                 if (defined $params{'action'}) {
 882                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 883                         delete $params{'action'};
 884                 }
 885
 886                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 887                 # stripping nonexistent or useless pieces
 888                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 889                         || $params{'hash_parent'} || $params{'hash'});
 890                 if (defined $params{'hash_base'}) {
 891                         if (defined $params{'hash_parent_base'}) {
 892                                 $href .= esc_url($params{'hash_parent_base'});
 893                                 # skip the file_parent if it's the same as the file_name
 894                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 895                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 896                                         $href .= ":/".esc_url($params{'file_parent'});
 897                                         delete $params{'file_parent'};
 898                                 }
 899                                 $href .= "..";
 900                                 delete $params{'hash_parent'};
 901                                 delete $params{'hash_parent_base'};
 902                         } elsif (defined $params{'hash_parent'}) {
 903                                 $href .= esc_url($params{'hash_parent'}). "..";
 904                                 delete $params{'hash_parent'};
 905                         }
 906
 907                         $href .= esc_url($params{'hash_base'});
 908                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 909                                 $href .= ":/".esc_url($params{'file_name'});
 910                                 delete $params{'file_name'};
 911                         }
 912                         delete $params{'hash'};
 913                         delete $params{'hash_base'};
 914                 } elsif (defined $params{'hash'}) {
 915                         $href .= esc_url($params{'hash'});
 916                         delete $params{'hash'};
 917                 }
 918
 919                 # If the action was a snapshot, we can absorb the
 920                 # snapshot_format parameter too
 921                 if ($is_snapshot) {
 922                         my $fmt = $params{'snapshot_format'};
 923                         # snapshot_format should always be defined when href()
 924                         # is called, but just in case some code forgets, we
 925                         # fall back to the default
 926                         $fmt ||= $snapshot_fmts[0];
 927                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 928                         delete $params{'snapshot_format'};
 929                 }
 930         }
 931
 932         # now encode the parameters explicitly
 933         my @result = ();
 934         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 935                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 936                 if (defined $params{$name}) {
 937                         if (ref($params{$name}) eq "ARRAY") {
 938                                 foreach my $par (@{$params{$name}}) {
 939                                         push @result, $symbol . "=" . esc_param($par);
 940                                 }
 941                         } else {
 942                                 push @result, $symbol . "=" . esc_param($params{$name});
 943                         }
 944                 }
 945         }
 946         $href .= "?" . join(';', @result) if scalar @result;
 947
 948         return $href;
 949 }
 950
 951
 952 ## ======================================================================
 953 ## validation, quoting/unquoting and escaping
 954
 955 sub validate_action {
 956         my $input = shift || return undef;
 957         return undef unless exists $actions{$input};
 958         return $input;
 959 }
 960
 961 sub validate_project {
 962         my $input = shift || return undef;
 963         if (!validate_pathname($input) ||
 964                 !(-d "$projectroot/$input") ||
 965                 !check_export_ok("$projectroot/$input") ||
 966                 ($strict_export && !project_in_list($input))) {
 967                 return undef;
 968         } else {
 969                 return $input;
 970         }
 971 }
 972
 973 sub validate_pathname {
 974         my $input = shift || return undef;
 975
 976         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 977         # at the beginning, at the end, and between slashes.
 978         # also this catches doubled slashes
 979         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 980                 return undef;
 981         }
 982         # no null characters
 983         if ($input =~ m!\0!) {
 984                 return undef;
 985         }
 986         return $input;
 987 }
 988
 989 sub validate_refname {
 990         my $input = shift || return undef;
 991
 992         # textual hashes are O.K.
 993         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 994                 return $input;
 995         }
 996         # it must be correct pathname
 997         $input = validate_pathname($input)
 998                 or return undef;
 999         # restrictions on ref name according to git-check-ref-format
1000         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1001                 return undef;
1002         }
1003         return $input;
1004 }
1005
1006 # decode sequences of octets in utf8 into Perl's internal form,
1007 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1008 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1009 sub to_utf8 {
1010         my $str = shift;
1011         if (utf8::valid($str)) {
1012                 utf8::decode($str);
1013                 return $str;
1014         } else {
1015                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1016         }
1017 }
1018
1019 # quote unsafe chars, but keep the slash, even when it's not
1020 # correct, but quoted slashes look too horrible in bookmarks
1021 sub esc_param {
1022         my $str = shift;
1023         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1024         $str =~ s/\+/%2B/g;
1025         $str =~ s/ /\+/g;
1026         return $str;
1027 }
1028
1029 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1030 sub esc_url {
1031         my $str = shift;
1032         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1033         $str =~ s/\+/%2B/g;
1034         $str =~ s/ /\+/g;
1035         return $str;
1036 }
1037
1038 # replace invalid utf8 character with SUBSTITUTION sequence
1039 sub esc_html {
1040         my $str = shift;
1041         my %opts = @_;
1042
1043         $str = to_utf8($str);
1044         $str = $cgi->escapeHTML($str);
1045         if ($opts{'-nbsp'}) {
1046                 $str =~ s/ /&nbsp;/g;
1047         }
1048         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1049         return $str;
1050 }
1051
1052 # quote control characters and escape filename to HTML
1053 sub esc_path {
1054         my $str = shift;
1055         my %opts = @_;
1056
1057         $str = to_utf8($str);
1058         $str = $cgi->escapeHTML($str);
1059         if ($opts{'-nbsp'}) {
1060                 $str =~ s/ /&nbsp;/g;
1061         }
1062         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1063         return $str;
1064 }
1065
1066 # Make control characters "printable", using character escape codes (CEC)
1067 sub quot_cec {
1068         my $cntrl = shift;
1069         my %opts = @_;
1070         my %es = ( # character escape codes, aka escape sequences
1071                 "\t" => '\t',   # tab            (HT)
1072                 "\n" => '\n',   # line feed      (LF)
1073                 "\r" => '\r',   # carrige return (CR)
1074                 "\f" => '\f',   # form feed      (FF)
1075                 "\b" => '\b',   # backspace      (BS)
1076                 "\a" => '\a',   # alarm (bell)   (BEL)
1077                 "\e" => '\e',   # escape         (ESC)
1078                 "\013" => '\v', # vertical tab   (VT)
1079                 "\000" => '\0', # nul character  (NUL)
1080         );
1081         my $chr = ( (exists $es{$cntrl})
1082                     ? $es{$cntrl}
1083                     : sprintf('\%2x', ord($cntrl)) );
1084         if ($opts{-nohtml}) {
1085                 return $chr;
1086         } else {
1087                 return "<span class=\"cntrl\">$chr</span>";
1088         }
1089 }
1090
1091 # Alternatively use unicode control pictures codepoints,
1092 # Unicode "printable representation" (PR)
1093 sub quot_upr {
1094         my $cntrl = shift;
1095         my %opts = @_;
1096
1097         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1098         if ($opts{-nohtml}) {
1099                 return $chr;
1100         } else {
1101                 return "<span class=\"cntrl\">$chr</span>";
1102         }
1103 }
1104
1105 # git may return quoted and escaped filenames
1106 sub unquote {
1107         my $str = shift;
1108
1109         sub unq {
1110                 my $seq = shift;
1111                 my %es = ( # character escape codes, aka escape sequences
1112                         't' => "\t",   # tab            (HT, TAB)
1113                         'n' => "\n",   # newline        (NL)
1114                         'r' => "\r",   # return         (CR)
1115                         'f' => "\f",   # form feed      (FF)
1116                         'b' => "\b",   # backspace      (BS)
1117                         'a' => "\a",   # alarm (bell)   (BEL)
1118                         'e' => "\e",   # escape         (ESC)
1119                         'v' => "\013", # vertical tab   (VT)
1120                 );
1121
1122                 if ($seq =~ m/^[0-7]{1,3}$/) {
1123                         # octal char sequence
1124                         return chr(oct($seq));
1125                 } elsif (exists $es{$seq}) {
1126                         # C escape sequence, aka character escape code
1127                         return $es{$seq};
1128                 }
1129                 # quoted ordinary character
1130                 return $seq;
1131         }
1132
1133         if ($str =~ m/^"(.*)"$/) {
1134                 # needs unquoting
1135                 $str = $1;
1136                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1137         }
1138         return $str;
1139 }
1140
1141 # escape tabs (convert tabs to spaces)
1142 sub untabify {
1143         my $line = shift;
1144
1145         while ((my $pos = index($line, "\t")) != -1) {
1146                 if (my $count = (8 - ($pos % 8))) {
1147                         my $spaces = ' ' x $count;
1148                         $line =~ s/\t/$spaces/;
1149                 }
1150         }
1151
1152         return $line;
1153 }
1154
1155 sub project_in_list {
1156         my $project = shift;
1157         my @list = git_get_projects_list();
1158         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1159 }
1160
1161 ## ----------------------------------------------------------------------
1162 ## HTML aware string manipulation
1163
1164 # Try to chop given string on a word boundary between position
1165 # $len and $len+$add_len. If there is no word boundary there,
1166 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1167 # (marking chopped part) would be longer than given string.
1168 sub chop_str {
1169         my $str = shift;
1170         my $len = shift;
1171         my $add_len = shift || 10;
1172         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1173
1174         # Make sure perl knows it is utf8 encoded so we don't
1175         # cut in the middle of a utf8 multibyte char.
1176         $str = to_utf8($str);
1177
1178         # allow only $len chars, but don't cut a word if it would fit in $add_len
1179         # if it doesn't fit, cut it if it's still longer than the dots we would add
1180         # remove chopped character entities entirely
1181
1182         # when chopping in the middle, distribute $len into left and right part
1183         # return early if chopping wouldn't make string shorter
1184         if ($where eq 'center') {
1185                 return $str if ($len + 5 >= length($str)); # filler is length 5
1186                 $len = int($len/2);
1187         } else {
1188                 return $str if ($len + 4 >= length($str)); # filler is length 4
1189         }
1190
1191         # regexps: ending and beginning with word part up to $add_len
1192         my $endre = qr/.{$len}\w{0,$add_len}/;
1193         my $begre = qr/\w{0,$add_len}.{$len}/;
1194
1195         if ($where eq 'left') {
1196                 $str =~ m/^(.*?)($begre)$/;
1197                 my ($lead, $body) = ($1, $2);
1198                 if (length($lead) > 4) {
1199                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1200                         $lead = " ...";
1201                 }
1202                 return "$lead$body";
1203
1204         } elsif ($where eq 'center') {
1205                 $str =~ m/^($endre)(.*)$/;
1206                 my ($left, $str)  = ($1, $2);
1207                 $str =~ m/^(.*?)($begre)$/;
1208                 my ($mid, $right) = ($1, $2);
1209                 if (length($mid) > 5) {
1210                         $left  =~ s/&[^;]*$//;
1211                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1212                         $mid = " ... ";
1213                 }
1214                 return "$left$mid$right";
1215
1216         } else {
1217                 $str =~ m/^($endre)(.*)$/;
1218                 my $body = $1;
1219                 my $tail = $2;
1220                 if (length($tail) > 4) {
1221                         $body =~ s/&[^;]*$//;
1222                         $tail = "... ";
1223                 }
1224                 return "$body$tail";
1225         }
1226 }
1227
1228 # takes the same arguments as chop_str, but also wraps a <span> around the
1229 # result with a title attribute if it does get chopped. Additionally, the
1230 # string is HTML-escaped.
1231 sub chop_and_escape_str {
1232         my ($str) = @_;
1233
1234         my $chopped = chop_str(@_);
1235         if ($chopped eq $str) {
1236                 return esc_html($chopped);
1237         } else {
1238                 $str =~ s/([[:cntrl:]])/?/g;
1239                 return $cgi->span({-title=>$str}, esc_html($chopped));
1240         }
1241 }
1242
1243 ## ----------------------------------------------------------------------
1244 ## functions returning short strings
1245
1246 # CSS class for given age value (in seconds)
1247 sub age_class {
1248         my $age = shift;
1249
1250         if (!defined $age) {
1251                 return "noage";
1252         } elsif ($age < 60*60*2) {
1253                 return "age0";
1254         } elsif ($age < 60*60*24*2) {
1255                 return "age1";
1256         } else {
1257                 return "age2";
1258         }
1259 }
1260
1261 # convert age in seconds to "nn units ago" string
1262 sub age_string {
1263         my $age = shift;
1264         my $age_str;
1265
1266         if ($age > 60*60*24*365*2) {
1267                 $age_str = (int $age/60/60/24/365);
1268                 $age_str .= " years ago";
1269         } elsif ($age > 60*60*24*(365/12)*2) {
1270                 $age_str = int $age/60/60/24/(365/12);
1271                 $age_str .= " months ago";
1272         } elsif ($age > 60*60*24*7*2) {
1273                 $age_str = int $age/60/60/24/7;
1274                 $age_str .= " weeks ago";
1275         } elsif ($age > 60*60*24*2) {
1276                 $age_str = int $age/60/60/24;
1277                 $age_str .= " days ago";
1278         } elsif ($age > 60*60*2) {
1279                 $age_str = int $age/60/60;
1280                 $age_str .= " hours ago";
1281         } elsif ($age > 60*2) {
1282                 $age_str = int $age/60;
1283                 $age_str .= " min ago";
1284         } elsif ($age > 2) {
1285                 $age_str = int $age;
1286                 $age_str .= " sec ago";
1287         } else {
1288                 $age_str .= " right now";
1289         }
1290         return $age_str;
1291 }
1292
1293 use constant {
1294         S_IFINVALID => 0030000,
1295         S_IFGITLINK => 0160000,
1296 };
1297
1298 # submodule/subproject, a commit object reference
1299 sub S_ISGITLINK {
1300         my $mode = shift;
1301
1302         return (($mode & S_IFMT) == S_IFGITLINK)
1303 }
1304
1305 # convert file mode in octal to symbolic file mode string
1306 sub mode_str {
1307         my $mode = oct shift;
1308
1309         if (S_ISGITLINK($mode)) {
1310                 return 'm---------';
1311         } elsif (S_ISDIR($mode & S_IFMT)) {
1312                 return 'drwxr-xr-x';
1313         } elsif (S_ISLNK($mode)) {
1314                 return 'lrwxrwxrwx';
1315         } elsif (S_ISREG($mode)) {
1316                 # git cares only about the executable bit
1317                 if ($mode & S_IXUSR) {
1318                         return '-rwxr-xr-x';
1319                 } else {
1320                         return '-rw-r--r--';
1321                 };
1322         } else {
1323                 return '----------';
1324         }
1325 }
1326
1327 # convert file mode in octal to file type string
1328 sub file_type {
1329         my $mode = shift;
1330
1331         if ($mode !~ m/^[0-7]+$/) {
1332                 return $mode;
1333         } else {
1334                 $mode = oct $mode;
1335         }
1336
1337         if (S_ISGITLINK($mode)) {
1338                 return "submodule";
1339         } elsif (S_ISDIR($mode & S_IFMT)) {
1340                 return "directory";
1341         } elsif (S_ISLNK($mode)) {
1342                 return "symlink";
1343         } elsif (S_ISREG($mode)) {
1344                 return "file";
1345         } else {
1346                 return "unknown";
1347         }
1348 }
1349
1350 # convert file mode in octal to file type description string
1351 sub file_type_long {
1352         my $mode = shift;
1353
1354         if ($mode !~ m/^[0-7]+$/) {
1355                 return $mode;
1356         } else {
1357                 $mode = oct $mode;
1358         }
1359
1360         if (S_ISGITLINK($mode)) {
1361                 return "submodule";
1362         } elsif (S_ISDIR($mode & S_IFMT)) {
1363                 return "directory";
1364         } elsif (S_ISLNK($mode)) {
1365                 return "symlink";
1366         } elsif (S_ISREG($mode)) {
1367                 if ($mode & S_IXUSR) {
1368                         return "executable";
1369                 } else {
1370                         return "file";
1371                 };
1372         } else {
1373                 return "unknown";
1374         }
1375 }
1376
1377
1378 ## ----------------------------------------------------------------------
1379 ## functions returning short HTML fragments, or transforming HTML fragments
1380 ## which don't belong to other sections
1381
1382 # format line of commit message.
1383 sub format_log_line_html {
1384         my $line = shift;
1385
1386         $line = esc_html($line, -nbsp=>1);
1387         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1388                 $cgi->a({-href => href(action=>"object", hash=>$1),
1389                                         -class => "text"}, $1);
1390         }eg;
1391
1392         return $line;
1393 }
1394
1395 # format marker of refs pointing to given object
1396
1397 # the destination action is chosen based on object type and current context:
1398 # - for annotated tags, we choose the tag view unless it's the current view
1399 #   already, in which case we go to shortlog view
1400 # - for other refs, we keep the current view if we're in history, shortlog or
1401 #   log view, and select shortlog otherwise
1402 sub format_ref_marker {
1403         my ($refs, $id) = @_;
1404         my $markers = '';
1405
1406         if (defined $refs->{$id}) {
1407                 foreach my $ref (@{$refs->{$id}}) {
1408                         # this code exploits the fact that non-lightweight tags are the
1409                         # only indirect objects, and that they are the only objects for which
1410                         # we want to use tag instead of shortlog as action
1411                         my ($type, $name) = qw();
1412                         my $indirect = ($ref =~ s/\^\{\}$//);
1413                         # e.g. tags/v2.6.11 or heads/next
1414                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1415                                 $type = $1;
1416                                 $name = $2;
1417                         } else {
1418                                 $type = "ref";
1419                                 $name = $ref;
1420                         }
1421
1422                         my $class = $type;
1423                         $class .= " indirect" if $indirect;
1424
1425                         my $dest_action = "shortlog";
1426
1427                         if ($indirect) {
1428                                 $dest_action = "tag" unless $action eq "tag";
1429                         } elsif ($action =~ /^(history|(short)?log)$/) {
1430                                 $dest_action = $action;
1431                         }
1432
1433                         my $dest = "";
1434                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1435                         $dest .= $ref;
1436
1437                         my $link = $cgi->a({
1438                                 -href => href(
1439                                         action=>$dest_action,
1440                                         hash=>$dest
1441                                 )}, $name);
1442
1443                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1444                                 $link . "</span>";
1445                 }
1446         }
1447
1448         if ($markers) {
1449                 return ' <span class="refs">'. $markers . '</span>';
1450         } else {
1451                 return "";
1452         }
1453 }
1454
1455 # format, perhaps shortened and with markers, title line
1456 sub format_subject_html {
1457         my ($long, $short, $href, $extra) = @_;
1458         $extra = '' unless defined($extra);
1459
1460         if (length($short) < length($long)) {
1461                 return $cgi->a({-href => $href, -class => "list subject",
1462                                 -title => to_utf8($long)},
1463                        esc_html($short) . $extra);
1464         } else {
1465                 return $cgi->a({-href => $href, -class => "list subject"},
1466                        esc_html($long)  . $extra);
1467         }
1468 }
1469
1470 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1471 sub format_git_diff_header_line {
1472         my $line = shift;
1473         my $diffinfo = shift;
1474         my ($from, $to) = @_;
1475
1476         if ($diffinfo->{'nparents'}) {
1477                 # combined diff
1478                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1479                 if ($to->{'href'}) {
1480                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1481                                          esc_path($to->{'file'}));
1482                 } else { # file was deleted (no href)
1483                         $line .= esc_path($to->{'file'});
1484                 }
1485         } else {
1486                 # "ordinary" diff
1487                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1488                 if ($from->{'href'}) {
1489                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1490                                          'a/' . esc_path($from->{'file'}));
1491                 } else { # file was added (no href)
1492                         $line .= 'a/' . esc_path($from->{'file'});
1493                 }
1494                 $line .= ' ';
1495                 if ($to->{'href'}) {
1496                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1497                                          'b/' . esc_path($to->{'file'}));
1498                 } else { # file was deleted
1499                         $line .= 'b/' . esc_path($to->{'file'});
1500                 }
1501         }
1502
1503         return "<div class=\"diff header\">$line</div>\n";
1504 }
1505
1506 # format extended diff header line, before patch itself
1507 sub format_extended_diff_header_line {
1508         my $line = shift;
1509         my $diffinfo = shift;
1510         my ($from, $to) = @_;
1511
1512         # match <path>
1513         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1514                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1515                                        esc_path($from->{'file'}));
1516         }
1517         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1518                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1519                                  esc_path($to->{'file'}));
1520         }
1521         # match single <mode>
1522         if ($line =~ m/\s(\d{6})$/) {
1523                 $line .= '<span class="info"> (' .
1524                          file_type_long($1) .
1525                          ')</span>';
1526         }
1527         # match <hash>
1528         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1529                 # can match only for combined diff
1530                 $line = 'index ';
1531                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1532                         if ($from->{'href'}[$i]) {
1533                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1534                                                   -class=>"hash"},
1535                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1536                         } else {
1537                                 $line .= '0' x 7;
1538                         }
1539                         # separator
1540                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1541                 }
1542                 $line .= '..';
1543                 if ($to->{'href'}) {
1544                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1545                                          substr($diffinfo->{'to_id'},0,7));
1546                 } else {
1547                         $line .= '0' x 7;
1548                 }
1549
1550         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1551                 # can match only for ordinary diff
1552                 my ($from_link, $to_link);
1553                 if ($from->{'href'}) {
1554                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1555                                              substr($diffinfo->{'from_id'},0,7));
1556                 } else {
1557                         $from_link = '0' x 7;
1558                 }
1559                 if ($to->{'href'}) {
1560                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1561                                            substr($diffinfo->{'to_id'},0,7));
1562                 } else {
1563                         $to_link = '0' x 7;
1564                 }
1565                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1566                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1567         }
1568
1569         return $line . "<br/>\n";
1570 }
1571
1572 # format from-file/to-file diff header
1573 sub format_diff_from_to_header {
1574         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1575         my $line;
1576         my $result = '';
1577
1578         $line = $from_line;
1579         #assert($line =~ m/^---/) if DEBUG;
1580         # no extra formatting for "^--- /dev/null"
1581         if (! $diffinfo->{'nparents'}) {
1582                 # ordinary (single parent) diff
1583                 if ($line =~ m!^--- "?a/!) {
1584                         if ($from->{'href'}) {
1585                                 $line = '--- a/' .
1586                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1587                                                 esc_path($from->{'file'}));
1588                         } else {
1589                                 $line = '--- a/' .
1590                                         esc_path($from->{'file'});
1591                         }
1592                 }
1593                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1594
1595         } else {
1596                 # combined diff (merge commit)
1597                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1598                         if ($from->{'href'}[$i]) {
1599                                 $line = '--- ' .
1600                                         $cgi->a({-href=>href(action=>"blobdiff",
1601                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1602                                                              hash_parent_base=>$parents[$i],
1603                                                              file_parent=>$from->{'file'}[$i],
1604                                                              hash=>$diffinfo->{'to_id'},
1605                                                              hash_base=>$hash,
1606                                                              file_name=>$to->{'file'}),
1607                                                  -class=>"path",
1608                                                  -title=>"diff" . ($i+1)},
1609                                                 $i+1) .
1610                                         '/' .
1611                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1612                                                 esc_path($from->{'file'}[$i]));
1613                         } else {
1614                                 $line = '--- /dev/null';
1615                         }
1616                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1617                 }
1618         }
1619
1620         $line = $to_line;
1621         #assert($line =~ m/^\+\+\+/) if DEBUG;
1622         # no extra formatting for "^+++ /dev/null"
1623         if ($line =~ m!^\+\+\+ "?b/!) {
1624                 if ($to->{'href'}) {
1625                         $line = '+++ b/' .
1626                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1627                                         esc_path($to->{'file'}));
1628                 } else {
1629                         $line = '+++ b/' .
1630                                 esc_path($to->{'file'});
1631                 }
1632         }
1633         $result .= qq!<div class="diff to_file">$line</div>\n!;
1634
1635         return $result;
1636 }
1637
1638 # create note for patch simplified by combined diff
1639 sub format_diff_cc_simplified {
1640         my ($diffinfo, @parents) = @_;
1641         my $result = '';
1642
1643         $result .= "<div class=\"diff header\">" .
1644                    "diff --cc ";
1645         if (!is_deleted($diffinfo)) {
1646                 $result .= $cgi->a({-href => href(action=>"blob",
1647                                                   hash_base=>$hash,
1648                                                   hash=>$diffinfo->{'to_id'},
1649                                                   file_name=>$diffinfo->{'to_file'}),
1650                                     -class => "path"},
1651                                    esc_path($diffinfo->{'to_file'}));
1652         } else {
1653                 $result .= esc_path($diffinfo->{'to_file'});
1654         }
1655         $result .= "</div>\n" . # class="diff header"
1656                    "<div class=\"diff nodifferences\">" .
1657                    "Simple merge" .
1658                    "</div>\n"; # class="diff nodifferences"
1659
1660         return $result;
1661 }
1662
1663 # format patch (diff) line (not to be used for diff headers)
1664 sub format_diff_line {
1665         my $line = shift;
1666         my ($from, $to) = @_;
1667         my $diff_class = "";
1668
1669         chomp $line;
1670
1671         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1672                 # combined diff
1673                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1674                 if ($line =~ m/^\@{3}/) {
1675                         $diff_class = " chunk_header";
1676                 } elsif ($line =~ m/^\\/) {
1677                         $diff_class = " incomplete";
1678                 } elsif ($prefix =~ tr/+/+/) {
1679                         $diff_class = " add";
1680                 } elsif ($prefix =~ tr/-/-/) {
1681                         $diff_class = " rem";
1682                 }
1683         } else {
1684                 # assume ordinary diff
1685                 my $char = substr($line, 0, 1);
1686                 if ($char eq '+') {
1687                         $diff_class = " add";
1688                 } elsif ($char eq '-') {
1689                         $diff_class = " rem";
1690                 } elsif ($char eq '@') {
1691                         $diff_class = " chunk_header";
1692                 } elsif ($char eq "\\") {
1693                         $diff_class = " incomplete";
1694                 }
1695         }
1696         $line = untabify($line);
1697         if ($from && $to && $line =~ m/^\@{2} /) {
1698                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1699                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1700
1701                 $from_lines = 0 unless defined $from_lines;
1702                 $to_lines   = 0 unless defined $to_lines;
1703
1704                 if ($from->{'href'}) {
1705                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1706                                              -class=>"list"}, $from_text);
1707                 }
1708                 if ($to->{'href'}) {
1709                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1710                                              -class=>"list"}, $to_text);
1711                 }
1712                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1713                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1714                 return "<div class=\"diff$diff_class\">$line</div>\n";
1715         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1716                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1717                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1718
1719                 @from_text = split(' ', $ranges);
1720                 for (my $i = 0; $i < @from_text; ++$i) {
1721                         ($from_start[$i], $from_nlines[$i]) =
1722                                 (split(',', substr($from_text[$i], 1)), 0);
1723                 }
1724
1725                 $to_text   = pop @from_text;
1726                 $to_start  = pop @from_start;
1727                 $to_nlines = pop @from_nlines;
1728
1729                 $line = "<span class=\"chunk_info\">$prefix ";
1730                 for (my $i = 0; $i < @from_text; ++$i) {
1731                         if ($from->{'href'}[$i]) {
1732                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1733                                                   -class=>"list"}, $from_text[$i]);
1734                         } else {
1735                                 $line .= $from_text[$i];
1736                         }
1737                         $line .= " ";
1738                 }
1739                 if ($to->{'href'}) {
1740                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1741                                           -class=>"list"}, $to_text);
1742                 } else {
1743                         $line .= $to_text;
1744                 }
1745                 $line .= " $prefix</span>" .
1746                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1747                 return "<div class=\"diff$diff_class\">$line</div>\n";
1748         }
1749         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1750 }
1751
1752 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1753 # linked.  Pass the hash of the tree/commit to snapshot.
1754 sub format_snapshot_links {
1755         my ($hash) = @_;
1756         my $num_fmts = @snapshot_fmts;
1757         if ($num_fmts > 1) {
1758                 # A parenthesized list of links bearing format names.
1759                 # e.g. "snapshot (_tar.gz_ _zip_)"
1760                 return "snapshot (" . join(' ', map
1761                         $cgi->a({
1762                                 -href => href(
1763                                         action=>"snapshot",
1764                                         hash=>$hash,
1765                                         snapshot_format=>$_
1766                                 )
1767                         }, $known_snapshot_formats{$_}{'display'})
1768                 , @snapshot_fmts) . ")";
1769         } elsif ($num_fmts == 1) {
1770                 # A single "snapshot" link whose tooltip bears the format name.
1771                 # i.e. "_snapshot_"
1772                 my ($fmt) = @snapshot_fmts;
1773                 return
1774                         $cgi->a({
1775                                 -href => href(
1776                                         action=>"snapshot",
1777                                         hash=>$hash,
1778                                         snapshot_format=>$fmt
1779                                 ),
1780                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1781                         }, "snapshot");
1782         } else { # $num_fmts == 0
1783                 return undef;
1784         }
1785 }
1786
1787 ## ......................................................................
1788 ## functions returning values to be passed, perhaps after some
1789 ## transformation, to other functions; e.g. returning arguments to href()
1790
1791 # returns hash to be passed to href to generate gitweb URL
1792 # in -title key it returns description of link
1793 sub get_feed_info {
1794         my $format = shift || 'Atom';
1795         my %res = (action => lc($format));
1796
1797         # feed links are possible only for project views
1798         return unless (defined $project);
1799         # some views should link to OPML, or to generic project feed,
1800         # or don't have specific feed yet (so they should use generic)
1801         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1802
1803         my $branch;
1804         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1805         # from tag links; this also makes possible to detect branch links
1806         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1807             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1808                 $branch = $1;
1809         }
1810         # find log type for feed description (title)
1811         my $type = 'log';
1812         if (defined $file_name) {
1813                 $type  = "history of $file_name";
1814                 $type .= "/" if ($action eq 'tree');
1815                 $type .= " on '$branch'" if (defined $branch);
1816         } else {
1817                 $type = "log of $branch" if (defined $branch);
1818         }
1819
1820         $res{-title} = $type;
1821         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1822         $res{'file_name'} = $file_name;
1823
1824         return %res;
1825 }
1826
1827 ## ----------------------------------------------------------------------
1828 ## git utility subroutines, invoking git commands
1829
1830 # returns path to the core git executable and the --git-dir parameter as list
1831 sub git_cmd {
1832         return $GIT, '--git-dir='.$git_dir;
1833 }
1834
1835 # quote the given arguments for passing them to the shell
1836 # quote_command("command", "arg 1", "arg with ' and ! characters")
1837 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1838 # Try to avoid using this function wherever possible.
1839 sub quote_command {
1840         return join(' ',
1841                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1842 }
1843
1844 # get HEAD ref of given project as hash
1845 sub git_get_head_hash {
1846         my $project = shift;
1847         my $o_git_dir = $git_dir;
1848         my $retval = undef;
1849         $git_dir = "$projectroot/$project";
1850         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1851                 my $head = <$fd>;
1852                 close $fd;
1853                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1854                         $retval = $1;
1855                 }
1856         }
1857         if (defined $o_git_dir) {
1858                 $git_dir = $o_git_dir;
1859         }
1860         return $retval;
1861 }
1862
1863 # get type of given object
1864 sub git_get_type {
1865         my $hash = shift;
1866
1867         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1868         my $type = <$fd>;
1869         close $fd or return;
1870         chomp $type;
1871         return $type;
1872 }
1873
1874 # repository configuration
1875 our $config_file = '';
1876 our %config;
1877
1878 # store multiple values for single key as anonymous array reference
1879 # single values stored directly in the hash, not as [ <value> ]
1880 sub hash_set_multi {
1881         my ($hash, $key, $value) = @_;
1882
1883         if (!exists $hash->{$key}) {
1884                 $hash->{$key} = $value;
1885         } elsif (!ref $hash->{$key}) {
1886                 $hash->{$key} = [ $hash->{$key}, $value ];
1887         } else {
1888                 push @{$hash->{$key}}, $value;
1889         }
1890 }
1891
1892 # return hash of git project configuration
1893 # optionally limited to some section, e.g. 'gitweb'
1894 sub git_parse_project_config {
1895         my $section_regexp = shift;
1896         my %config;
1897
1898         local $/ = "\0";
1899
1900         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1901                 or return;
1902
1903         while (my $keyval = <$fh>) {
1904                 chomp $keyval;
1905                 my ($key, $value) = split(/\n/, $keyval, 2);
1906
1907                 hash_set_multi(\%config, $key, $value)
1908                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1909         }
1910         close $fh;
1911
1912         return %config;
1913 }
1914
1915 # convert config value to boolean: 'true' or 'false'
1916 # no value, number > 0, 'true' and 'yes' values are true
1917 # rest of values are treated as false (never as error)
1918 sub config_to_bool {
1919         my $val = shift;
1920
1921         return 1 if !defined $val;             # section.key
1922
1923         # strip leading and trailing whitespace
1924         $val =~ s/^\s+//;
1925         $val =~ s/\s+$//;
1926
1927         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1928                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1929 }
1930
1931 # convert config value to simple decimal number
1932 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1933 # to be multiplied by 1024, 1048576, or 1073741824
1934 sub config_to_int {
1935         my $val = shift;
1936
1937         # strip leading and trailing whitespace
1938         $val =~ s/^\s+//;
1939         $val =~ s/\s+$//;
1940
1941         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1942                 $unit = lc($unit);
1943                 # unknown unit is treated as 1
1944                 return $num * ($unit eq 'g' ? 1073741824 :
1945                                $unit eq 'm' ?    1048576 :
1946                                $unit eq 'k' ?       1024 : 1);
1947         }
1948         return $val;
1949 }
1950
1951 # convert config value to array reference, if needed
1952 sub config_to_multi {
1953         my $val = shift;
1954
1955         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1956 }
1957
1958 sub git_get_project_config {
1959         my ($key, $type) = @_;
1960
1961         # key sanity check
1962         return unless ($key);
1963         $key =~ s/^gitweb\.//;
1964         return if ($key =~ m/\W/);
1965
1966         # type sanity check
1967         if (defined $type) {
1968                 $type =~ s/^--//;
1969                 $type = undef
1970                         unless ($type eq 'bool' || $type eq 'int');
1971         }
1972
1973         # get config
1974         if (!defined $config_file ||
1975             $config_file ne "$git_dir/config") {
1976                 %config = git_parse_project_config('gitweb');
1977                 $config_file = "$git_dir/config";
1978         }
1979
1980         # check if config variable (key) exists
1981         return unless exists $config{"gitweb.$key"};
1982
1983         # ensure given type
1984         if (!defined $type) {
1985                 return $config{"gitweb.$key"};
1986         } elsif ($type eq 'bool') {
1987                 # backward compatibility: 'git config --bool' returns true/false
1988                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1989         } elsif ($type eq 'int') {
1990                 return config_to_int($config{"gitweb.$key"});
1991         }
1992         return $config{"gitweb.$key"};
1993 }
1994
1995 # get hash of given path at given ref
1996 sub git_get_hash_by_path {
1997         my $base = shift;
1998         my $path = shift || return undef;
1999         my $type = shift;
2000
2001         $path =~ s,/+$,,;
2002
2003         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2004                 or die_error(500, "Open git-ls-tree failed");
2005         my $line = <$fd>;
2006         close $fd or return undef;
2007
2008         if (!defined $line) {
2009                 # there is no tree or hash given by $path at $base
2010                 return undef;
2011         }
2012
2013         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2014         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2015         if (defined $type && $type ne $2) {
2016                 # type doesn't match
2017                 return undef;
2018         }
2019         return $3;
2020 }
2021
2022 # get path of entry with given hash at given tree-ish (ref)
2023 # used to get 'from' filename for combined diff (merge commit) for renames
2024 sub git_get_path_by_hash {
2025         my $base = shift || return;
2026         my $hash = shift || return;
2027
2028         local $/ = "\0";
2029
2030         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2031                 or return undef;
2032         while (my $line = <$fd>) {
2033                 chomp $line;
2034
2035                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2036                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2037                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2038                         close $fd;
2039                         return $1;
2040                 }
2041         }
2042         close $fd;
2043         return undef;
2044 }
2045
2046 ## ......................................................................
2047 ## git utility functions, directly accessing git repository
2048
2049 sub git_get_project_description {
2050         my $path = shift;
2051
2052         $git_dir = "$projectroot/$path";
2053         open my $fd, "$git_dir/description"
2054                 or return git_get_project_config('description');
2055         my $descr = <$fd>;
2056         close $fd;
2057         if (defined $descr) {
2058                 chomp $descr;
2059         }
2060         return $descr;
2061 }
2062
2063 sub git_get_project_ctags {
2064         my $path = shift;
2065         my $ctags = {};
2066
2067         $git_dir = "$projectroot/$path";
2068         unless (opendir D, "$git_dir/ctags") {
2069                 return $ctags;
2070         }
2071         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2072                 open CT, $_ or next;
2073                 my $val = <CT>;
2074                 chomp $val;
2075                 close CT;
2076                 my $ctag = $_; $ctag =~ s#.*/##;
2077                 $ctags->{$ctag} = $val;
2078         }
2079         closedir D;
2080         $ctags;
2081 }
2082
2083 sub git_populate_project_tagcloud {
2084         my $ctags = shift;
2085
2086         # First, merge different-cased tags; tags vote on casing
2087         my %ctags_lc;
2088         foreach (keys %$ctags) {
2089                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2090                 if (not $ctags_lc{lc $_}->{topcount}
2091                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2092                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2093                         $ctags_lc{lc $_}->{topname} = $_;
2094                 }
2095         }
2096
2097         my $cloud;
2098         if (eval { require HTML::TagCloud; 1; }) {
2099                 $cloud = HTML::TagCloud->new;
2100                 foreach (sort keys %ctags_lc) {
2101                         # Pad the title with spaces so that the cloud looks
2102                         # less crammed.
2103                         my $title = $ctags_lc{$_}->{topname};
2104                         $title =~ s/ /&nbsp;/g;
2105                         $title =~ s/^/&nbsp;/g;
2106                         $title =~ s/$/&nbsp;/g;
2107                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2108                 }
2109         } else {
2110                 $cloud = \%ctags_lc;
2111         }
2112         $cloud;
2113 }
2114
2115 sub git_show_project_tagcloud {
2116         my ($cloud, $count) = @_;
2117         print STDERR ref($cloud)."..\n";
2118         if (ref $cloud eq 'HTML::TagCloud') {
2119                 return $cloud->html_and_css($count);
2120         } else {
2121                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2122                 return '<p align="center">' . join (', ', map {
2123                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2124                 } splice(@tags, 0, $count)) . '</p>';
2125         }
2126 }
2127
2128 sub git_get_project_url_list {
2129         my $path = shift;
2130
2131         $git_dir = "$projectroot/$path";
2132         open my $fd, "$git_dir/cloneurl"
2133                 or return wantarray ?
2134                 @{ config_to_multi(git_get_project_config('url')) } :
2135                    config_to_multi(git_get_project_config('url'));
2136         my @git_project_url_list = map { chomp; $_ } <$fd>;
2137         close $fd;
2138
2139         return wantarray ? @git_project_url_list : \@git_project_url_list;
2140 }
2141
2142 sub git_get_projects_list {
2143         my ($filter) = @_;
2144         my @list;
2145
2146         $filter ||= '';
2147         $filter =~ s/\.git$//;
2148
2149         my $check_forks = gitweb_check_feature('forks');
2150
2151         if (-d $projects_list) {
2152                 # search in directory
2153                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2154                 # remove the trailing "/"
2155                 $dir =~ s!/+$!!;
2156                 my $pfxlen = length("$dir");
2157                 my $pfxdepth = ($dir =~ tr!/!!);
2158
2159                 File::Find::find({
2160                         follow_fast => 1, # follow symbolic links
2161                         follow_skip => 2, # ignore duplicates
2162                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2163                         wanted => sub {
2164                                 # skip project-list toplevel, if we get it.
2165                                 return if (m!^[/.]$!);
2166                                 # only directories can be git repositories
2167                                 return unless (-d $_);
2168                                 # don't traverse too deep (Find is super slow on os x)
2169                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2170                                         $File::Find::prune = 1;
2171                                         return;
2172                                 }
2173
2174                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2175                                 # we check related file in $projectroot
2176                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2177                                 if (check_export_ok("$projectroot/$path")) {
2178                                         push @list, { path => $path };
2179                                         $File::Find::prune = 1;
2180                                 }
2181                         },
2182                 }, "$dir");
2183
2184         } elsif (-f $projects_list) {
2185                 # read from file(url-encoded):
2186                 # 'git%2Fgit.git Linus+Torvalds'
2187                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2188                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2189                 my %paths;
2190                 open my ($fd), $projects_list or return;
2191         PROJECT:
2192                 while (my $line = <$fd>) {
2193                         chomp $line;
2194                         my ($path, $owner) = split ' ', $line;
2195                         $path = unescape($path);
2196                         $owner = unescape($owner);
2197                         if (!defined $path) {
2198                                 next;
2199                         }
2200                         if ($filter ne '') {
2201                                 # looking for forks;
2202                                 my $pfx = substr($path, 0, length($filter));
2203                                 if ($pfx ne $filter) {
2204                                         next PROJECT;
2205                                 }
2206                                 my $sfx = substr($path, length($filter));
2207                                 if ($sfx !~ /^\/.*\.git$/) {
2208                                         next PROJECT;
2209                                 }
2210                         } elsif ($check_forks) {
2211                         PATH:
2212                                 foreach my $filter (keys %paths) {
2213                                         # looking for forks;
2214                                         my $pfx = substr($path, 0, length($filter));
2215                                         if ($pfx ne $filter) {
2216                                                 next PATH;
2217                                         }
2218                                         my $sfx = substr($path, length($filter));
2219                                         if ($sfx !~ /^\/.*\.git$/) {
2220                                                 next PATH;
2221                                         }
2222                                         # is a fork, don't include it in
2223                                         # the list
2224                                         next PROJECT;
2225                                 }
2226                         }
2227                         if (check_export_ok("$projectroot/$path")) {
2228                                 my $pr = {
2229                                         path => $path,
2230                                         owner => to_utf8($owner),
2231                                 };
2232                                 push @list, $pr;
2233                                 (my $forks_path = $path) =~ s/\.git$//;
2234                                 $paths{$forks_path}++;
2235                         }
2236                 }
2237                 close $fd;
2238         }
2239         return @list;
2240 }
2241
2242 our $gitweb_project_owner = undef;
2243 sub git_get_project_list_from_file {
2244
2245         return if (defined $gitweb_project_owner);
2246
2247         $gitweb_project_owner = {};
2248         # read from file (url-encoded):
2249         # 'git%2Fgit.git Linus+Torvalds'
2250         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2251         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2252         if (-f $projects_list) {
2253                 open (my $fd , $projects_list);
2254                 while (my $line = <$fd>) {
2255                         chomp $line;
2256                         my ($pr, $ow) = split ' ', $line;
2257                         $pr = unescape($pr);
2258                         $ow = unescape($ow);
2259                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2260                 }
2261                 close $fd;
2262         }
2263 }
2264
2265 sub git_get_project_owner {
2266         my $project = shift;
2267         my $owner;
2268
2269         return undef unless $project;
2270         $git_dir = "$projectroot/$project";
2271
2272         if (!defined $gitweb_project_owner) {
2273                 git_get_project_list_from_file();
2274         }
2275
2276         if (exists $gitweb_project_owner->{$project}) {
2277                 $owner = $gitweb_project_owner->{$project};
2278         }
2279         if (!defined $owner){
2280                 $owner = git_get_project_config('owner');
2281         }
2282         if (!defined $owner) {
2283                 $owner = get_file_owner("$git_dir");
2284         }
2285
2286         return $owner;
2287 }
2288
2289 sub git_get_last_activity {
2290         my ($path) = @_;
2291         my $fd;
2292
2293         $git_dir = "$projectroot/$path";
2294         open($fd, "-|", git_cmd(), 'for-each-ref',
2295              '--format=%(committer)',
2296              '--sort=-committerdate',
2297              '--count=1',
2298              'refs/heads') or return;
2299         my $most_recent = <$fd>;
2300         close $fd or return;
2301         if (defined $most_recent &&
2302             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2303                 my $timestamp = $1;
2304                 my $age = time - $timestamp;
2305                 return ($age, age_string($age));
2306         }
2307         return (undef, undef);
2308 }
2309
2310 sub git_get_references {
2311         my $type = shift || "";
2312         my %refs;
2313         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2314         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2315         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2316                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2317                 or return;
2318
2319         while (my $line = <$fd>) {
2320                 chomp $line;
2321                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2322                         if (defined $refs{$1}) {
2323                                 push @{$refs{$1}}, $2;
2324                         } else {
2325                                 $refs{$1} = [ $2 ];
2326                         }
2327                 }
2328         }
2329         close $fd or return;
2330         return \%refs;
2331 }
2332
2333 sub git_get_rev_name_tags {
2334         my $hash = shift || return undef;
2335
2336         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2337                 or return;
2338         my $name_rev = <$fd>;
2339         close $fd;
2340
2341         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2342                 return $1;
2343         } else {
2344                 # catches also '$hash undefined' output
2345                 return undef;
2346         }
2347 }
2348
2349 ## ----------------------------------------------------------------------
2350 ## parse to hash functions
2351
2352 sub parse_date {
2353         my $epoch = shift;
2354         my $tz = shift || "-0000";
2355
2356         my %date;
2357         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2358         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2359         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2360         $date{'hour'} = $hour;
2361         $date{'minute'} = $min;
2362         $date{'mday'} = $mday;
2363         $date{'day'} = $days[$wday];
2364         $date{'month'} = $months[$mon];
2365         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2366                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2367         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2368                              $mday, $months[$mon], $hour ,$min;
2369         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2370                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2371
2372         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2373         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2374         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2375         $date{'hour_local'} = $hour;
2376         $date{'minute_local'} = $min;
2377         $date{'tz_local'} = $tz;
2378         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2379                                   1900+$year, $mon+1, $mday,
2380                                   $hour, $min, $sec, $tz);
2381         return %date;
2382 }
2383
2384 sub parse_tag {
2385         my $tag_id = shift;
2386         my %tag;
2387         my @comment;
2388
2389         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2390         $tag{'id'} = $tag_id;
2391         while (my $line = <$fd>) {
2392                 chomp $line;
2393                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2394                         $tag{'object'} = $1;
2395                 } elsif ($line =~ m/^type (.+)$/) {
2396                         $tag{'type'} = $1;
2397                 } elsif ($line =~ m/^tag (.+)$/) {
2398                         $tag{'name'} = $1;
2399                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2400                         $tag{'author'} = $1;
2401                         $tag{'epoch'} = $2;
2402                         $tag{'tz'} = $3;
2403                 } elsif ($line =~ m/--BEGIN/) {
2404                         push @comment, $line;
2405                         last;
2406                 } elsif ($line eq "") {
2407                         last;
2408                 }
2409         }
2410         push @comment, <$fd>;
2411         $tag{'comment'} = \@comment;
2412         close $fd or return;
2413         if (!defined $tag{'name'}) {
2414                 return
2415         };
2416         return %tag
2417 }
2418
2419 sub parse_commit_text {
2420         my ($commit_text, $withparents) = @_;
2421         my @commit_lines = split '\n', $commit_text;
2422         my %co;
2423
2424         pop @commit_lines; # Remove '\0'
2425
2426         if (! @commit_lines) {
2427                 return;
2428         }
2429
2430         my $header = shift @commit_lines;
2431         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2432                 return;
2433         }
2434         ($co{'id'}, my @parents) = split ' ', $header;
2435         while (my $line = shift @commit_lines) {
2436                 last if $line eq "\n";
2437                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2438                         $co{'tree'} = $1;
2439                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2440                         push @parents, $1;
2441                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2442                         $co{'author'} = $1;
2443                         $co{'author_epoch'} = $2;
2444                         $co{'author_tz'} = $3;
2445                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2446                                 $co{'author_name'}  = $1;
2447                                 $co{'author_email'} = $2;
2448                         } else {
2449                                 $co{'author_name'} = $co{'author'};
2450                         }
2451                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2452                         $co{'committer'} = $1;
2453                         $co{'committer_epoch'} = $2;
2454                         $co{'committer_tz'} = $3;
2455                         $co{'committer_name'} = $co{'committer'};
2456                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2457                                 $co{'committer_name'}  = $1;
2458                                 $co{'committer_email'} = $2;
2459                         } else {
2460                                 $co{'committer_name'} = $co{'committer'};
2461                         }
2462                 }
2463         }
2464         if (!defined $co{'tree'}) {
2465                 return;
2466         };
2467         $co{'parents'} = \@parents;
2468         $co{'parent'} = $parents[0];
2469
2470         foreach my $title (@commit_lines) {
2471                 $title =~ s/^    //;
2472                 if ($title ne "") {
2473                         $co{'title'} = chop_str($title, 80, 5);
2474                         # remove leading stuff of merges to make the interesting part visible
2475                         if (length($title) > 50) {
2476                                 $title =~ s/^Automatic //;
2477                                 $title =~ s/^merge (of|with) /Merge ... /i;
2478                                 if (length($title) > 50) {
2479                                         $title =~ s/(http|rsync):\/\///;
2480                                 }
2481                                 if (length($title) > 50) {
2482                                         $title =~ s/(master|www|rsync)\.//;
2483                                 }
2484                                 if (length($title) > 50) {
2485                                         $title =~ s/kernel.org:?//;
2486                                 }
2487                                 if (length($title) > 50) {
2488                                         $title =~ s/\/pub\/scm//;
2489                                 }
2490                         }
2491                         $co{'title_short'} = chop_str($title, 50, 5);
2492                         last;
2493                 }
2494         }
2495         if (! defined $co{'title'} || $co{'title'} eq "") {
2496                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2497         }
2498         # remove added spaces
2499         foreach my $line (@commit_lines) {
2500                 $line =~ s/^    //;
2501         }
2502         $co{'comment'} = \@commit_lines;
2503
2504         my $age = time - $co{'committer_epoch'};
2505         $co{'age'} = $age;
2506         $co{'age_string'} = age_string($age);
2507         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2508         if ($age > 60*60*24*7*2) {
2509                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2510                 $co{'age_string_age'} = $co{'age_string'};
2511         } else {
2512                 $co{'age_string_date'} = $co{'age_string'};
2513                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2514         }
2515         return %co;
2516 }
2517
2518 sub parse_commit {
2519         my ($commit_id) = @_;
2520         my %co;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--parents",
2526                 "--header",
2527                 "--max-count=1",
2528                 $commit_id,
2529                 "--",
2530                 or die_error(500, "Open git-rev-list failed");
2531         %co = parse_commit_text(<$fd>, 1);
2532         close $fd;
2533
2534         return %co;
2535 }
2536
2537 sub parse_commits {
2538         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2539         my @cos;
2540
2541         $maxcount ||= 1;
2542         $skip ||= 0;
2543
2544         local $/ = "\0";
2545
2546         open my $fd, "-|", git_cmd(), "rev-list",
2547                 "--header",
2548                 @args,
2549                 ("--max-count=" . $maxcount),
2550                 ("--skip=" . $skip),
2551                 @extra_options,
2552                 $commit_id,
2553                 "--",
2554                 ($filename ? ($filename) : ())
2555                 or die_error(500, "Open git-rev-list failed");
2556         while (my $line = <$fd>) {
2557                 my %co = parse_commit_text($line);
2558                 push @cos, \%co;
2559         }
2560         close $fd;
2561
2562         return wantarray ? @cos : \@cos;
2563 }
2564
2565 # parse line of git-diff-tree "raw" output
2566 sub parse_difftree_raw_line {
2567         my $line = shift;
2568         my %res;
2569
2570         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2571         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2572         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2573                 $res{'from_mode'} = $1;
2574                 $res{'to_mode'} = $2;
2575                 $res{'from_id'} = $3;
2576                 $res{'to_id'} = $4;
2577                 $res{'status'} = $5;
2578                 $res{'similarity'} = $6;
2579                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2580                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2581                 } else {
2582                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2583                 }
2584         }
2585         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2586         # combined diff (for merge commit)
2587         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2588                 $res{'nparents'}  = length($1);
2589                 $res{'from_mode'} = [ split(' ', $2) ];
2590                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2591                 $res{'from_id'} = [ split(' ', $3) ];
2592                 $res{'to_id'} = pop @{$res{'from_id'}};
2593                 $res{'status'} = [ split('', $4) ];
2594                 $res{'to_file'} = unquote($5);
2595         }
2596         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2597         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2598                 $res{'commit'} = $1;
2599         }
2600
2601         return wantarray ? %res : \%res;
2602 }
2603
2604 # wrapper: return parsed line of git-diff-tree "raw" output
2605 # (the argument might be raw line, or parsed info)
2606 sub parsed_difftree_line {
2607         my $line_or_ref = shift;
2608
2609         if (ref($line_or_ref) eq "HASH") {
2610                 # pre-parsed (or generated by hand)
2611                 return $line_or_ref;
2612         } else {
2613                 return parse_difftree_raw_line($line_or_ref);
2614         }
2615 }
2616
2617 # parse line of git-ls-tree output
2618 sub parse_ls_tree_line {
2619         my $line = shift;
2620         my %opts = @_;
2621         my %res;
2622
2623         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2624         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2625
2626         $res{'mode'} = $1;
2627         $res{'type'} = $2;
2628         $res{'hash'} = $3;
2629         if ($opts{'-z'}) {
2630                 $res{'name'} = $4;
2631         } else {
2632                 $res{'name'} = unquote($4);
2633         }
2634
2635         return wantarray ? %res : \%res;
2636 }
2637
2638 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2639 sub parse_from_to_diffinfo {
2640         my ($diffinfo, $from, $to, @parents) = @_;
2641
2642         if ($diffinfo->{'nparents'}) {
2643                 # combined diff
2644                 $from->{'file'} = [];
2645                 $from->{'href'} = [];
2646                 fill_from_file_info($diffinfo, @parents)
2647                         unless exists $diffinfo->{'from_file'};
2648                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2649                         $from->{'file'}[$i] =
2650                                 defined $diffinfo->{'from_file'}[$i] ?
2651                                         $diffinfo->{'from_file'}[$i] :
2652                                         $diffinfo->{'to_file'};
2653                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2654                                 $from->{'href'}[$i] = href(action=>"blob",
2655                                                            hash_base=>$parents[$i],
2656                                                            hash=>$diffinfo->{'from_id'}[$i],
2657                                                            file_name=>$from->{'file'}[$i]);
2658                         } else {
2659                                 $from->{'href'}[$i] = undef;
2660                         }
2661                 }
2662         } else {
2663                 # ordinary (not combined) diff
2664                 $from->{'file'} = $diffinfo->{'from_file'};
2665                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2666                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2667                                                hash=>$diffinfo->{'from_id'},
2668                                                file_name=>$from->{'file'});
2669                 } else {
2670                         delete $from->{'href'};
2671                 }
2672         }
2673
2674         $to->{'file'} = $diffinfo->{'to_file'};
2675         if (!is_deleted($diffinfo)) { # file exists in result
2676                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2677                                      hash=>$diffinfo->{'to_id'},
2678                                      file_name=>$to->{'file'});
2679         } else {
2680                 delete $to->{'href'};
2681         }
2682 }
2683
2684 ## ......................................................................
2685 ## parse to array of hashes functions
2686
2687 sub git_get_heads_list {
2688         my $limit = shift;
2689         my @headslist;
2690
2691         open my $fd, '-|', git_cmd(), 'for-each-ref',
2692                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2693                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2694                 'refs/heads'
2695                 or return;
2696         while (my $line = <$fd>) {
2697                 my %ref_item;
2698
2699                 chomp $line;
2700                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2701                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2702                 my ($committer, $epoch, $tz) =
2703                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2704                 $ref_item{'fullname'}  = $name;
2705                 $name =~ s!^refs/heads/!!;
2706
2707                 $ref_item{'name'}  = $name;
2708                 $ref_item{'id'}    = $hash;
2709                 $ref_item{'title'} = $title || '(no commit message)';
2710                 $ref_item{'epoch'} = $epoch;
2711                 if ($epoch) {
2712                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2713                 } else {
2714                         $ref_item{'age'} = "unknown";
2715                 }
2716
2717                 push @headslist, \%ref_item;
2718         }
2719         close $fd;
2720
2721         return wantarray ? @headslist : \@headslist;
2722 }
2723
2724 sub git_get_tags_list {
2725         my $limit = shift;
2726         my @tagslist;
2727
2728         open my $fd, '-|', git_cmd(), 'for-each-ref',
2729                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2730                 '--format=%(objectname) %(objecttype) %(refname) '.
2731                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2732                 'refs/tags'
2733                 or return;
2734         while (my $line = <$fd>) {
2735                 my %ref_item;
2736
2737                 chomp $line;
2738                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2739                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2740                 my ($creator, $epoch, $tz) =
2741                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2742                 $ref_item{'fullname'} = $name;
2743                 $name =~ s!^refs/tags/!!;
2744
2745                 $ref_item{'type'} = $type;
2746                 $ref_item{'id'} = $id;
2747                 $ref_item{'name'} = $name;
2748                 if ($type eq "tag") {
2749                         $ref_item{'subject'} = $title;
2750                         $ref_item{'reftype'} = $reftype;
2751                         $ref_item{'refid'}   = $refid;
2752                 } else {
2753                         $ref_item{'reftype'} = $type;
2754                         $ref_item{'refid'}   = $id;
2755                 }
2756
2757                 if ($type eq "tag" || $type eq "commit") {
2758                         $ref_item{'epoch'} = $epoch;
2759                         if ($epoch) {
2760                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2761                         } else {
2762                                 $ref_item{'age'} = "unknown";
2763                         }
2764                 }
2765
2766                 push @tagslist, \%ref_item;
2767         }
2768         close $fd;
2769
2770         return wantarray ? @tagslist : \@tagslist;
2771 }
2772
2773 ## ----------------------------------------------------------------------
2774 ## filesystem-related functions
2775
2776 sub get_file_owner {
2777         my $path = shift;
2778
2779         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2780         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2781         if (!defined $gcos) {
2782                 return undef;
2783         }
2784         my $owner = $gcos;
2785         $owner =~ s/[,;].*$//;
2786         return to_utf8($owner);
2787 }
2788
2789 # assume that file exists
2790 sub insert_file {
2791         my $filename = shift;
2792
2793         open my $fd, '<', $filename;
2794         print map { to_utf8($_) } <$fd>;
2795         close $fd;
2796 }
2797
2798 ## ......................................................................
2799 ## mimetype related functions
2800
2801 sub mimetype_guess_file {
2802         my $filename = shift;
2803         my $mimemap = shift;
2804         -r $mimemap or return undef;
2805
2806         my %mimemap;
2807         open(MIME, $mimemap) or return undef;
2808         while (<MIME>) {
2809                 next if m/^#/; # skip comments
2810                 my ($mime, $exts) = split(/\t+/);
2811                 if (defined $exts) {
2812                         my @exts = split(/\s+/, $exts);
2813                         foreach my $ext (@exts) {
2814                                 $mimemap{$ext} = $mime;
2815                         }
2816                 }
2817         }
2818         close(MIME);
2819
2820         $filename =~ /\.([^.]*)$/;
2821         return $mimemap{$1};
2822 }
2823
2824 sub mimetype_guess {
2825         my $filename = shift;
2826         my $mime;
2827         $filename =~ /\./ or return undef;
2828
2829         if ($mimetypes_file) {
2830                 my $file = $mimetypes_file;
2831                 if ($file !~ m!^/!) { # if it is relative path
2832                         # it is relative to project
2833                         $file = "$projectroot/$project/$file";
2834                 }
2835                 $mime = mimetype_guess_file($filename, $file);
2836         }
2837         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2838         return $mime;
2839 }
2840
2841 sub blob_mimetype {
2842         my $fd = shift;
2843         my $filename = shift;
2844
2845         if ($filename) {
2846                 my $mime = mimetype_guess($filename);
2847                 $mime and return $mime;
2848         }
2849
2850         # just in case
2851         return $default_blob_plain_mimetype unless $fd;
2852
2853         if (-T $fd) {
2854                 return 'text/plain';
2855         } elsif (! $filename) {
2856                 return 'application/octet-stream';
2857         } elsif ($filename =~ m/\.png$/i) {
2858                 return 'image/png';
2859         } elsif ($filename =~ m/\.gif$/i) {
2860                 return 'image/gif';
2861         } elsif ($filename =~ m/\.jpe?g$/i) {
2862                 return 'image/jpeg';
2863         } else {
2864                 return 'application/octet-stream';
2865         }
2866 }
2867
2868 sub blob_contenttype {
2869         my ($fd, $file_name, $type) = @_;
2870
2871         $type ||= blob_mimetype($fd, $file_name);
2872         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2873                 $type .= "; charset=$default_text_plain_charset";
2874         }
2875
2876         return $type;
2877 }
2878
2879 ## ======================================================================
2880 ## functions printing HTML: header, footer, error page
2881
2882 sub git_header_html {
2883         my $status = shift || "200 OK";
2884         my $expires = shift;
2885
2886         my $title = "$site_name";
2887         if (defined $project) {
2888                 $title .= " - " . to_utf8($project);
2889                 if (defined $action) {
2890                         $title .= "/$action";
2891                         if (defined $file_name) {
2892                                 $title .= " - " . esc_path($file_name);
2893                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2894                                         $title .= "/";
2895                                 }
2896                         }
2897                 }
2898         }
2899         my $content_type;
2900         # require explicit support from the UA if we are to send the page as
2901         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2902         # we have to do this because MSIE sometimes globs '*/*', pretending to
2903         # support xhtml+xml but choking when it gets what it asked for.
2904         if (defined $cgi->http('HTTP_ACCEPT') &&
2905             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2906             $cgi->Accept('application/xhtml+xml') != 0) {
2907                 $content_type = 'application/xhtml+xml';
2908         } else {
2909                 $content_type = 'text/html';
2910         }
2911         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2912                            -status=> $status, -expires => $expires);
2913         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2914         print <<EOF;
2915 <?xml version="1.0" encoding="utf-8"?>
2916 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2917 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2918 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2919 <!-- git core binaries version $git_version -->
2920 <head>
2921 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2922 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2923 <meta name="robots" content="index, nofollow"/>
2924 <title>$title</title>
2925 EOF
2926         # the stylesheet, favicon etc urls won't work correctly with path_info
2927         # unless we set the appropriate base URL
2928         if ($ENV{'PATH_INFO'}) {
2929                 print "<base href=\"".esc_url($base_url)."\" />\n";
2930         }
2931         # print out each stylesheet that exist, providing backwards capability
2932         # for those people who defined $stylesheet in a config file
2933         if (defined $stylesheet) {
2934                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2935         } else {
2936                 foreach my $stylesheet (@stylesheets) {
2937                         next unless $stylesheet;
2938                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2939                 }
2940         }
2941         if (defined $project) {
2942                 my %href_params = get_feed_info();
2943                 if (!exists $href_params{'-title'}) {
2944                         $href_params{'-title'} = 'log';
2945                 }
2946
2947                 foreach my $format qw(RSS Atom) {
2948                         my $type = lc($format);
2949                         my %link_attr = (
2950                                 '-rel' => 'alternate',
2951                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2952                                 '-type' => "application/$type+xml"
2953                         );
2954
2955                         $href_params{'action'} = $type;
2956                         $link_attr{'-href'} = href(%href_params);
2957                         print "<link ".
2958                               "rel=\"$link_attr{'-rel'}\" ".
2959                               "title=\"$link_attr{'-title'}\" ".
2960                               "href=\"$link_attr{'-href'}\" ".
2961                               "type=\"$link_attr{'-type'}\" ".
2962                               "/>\n";
2963
2964                         $href_params{'extra_options'} = '--no-merges';
2965                         $link_attr{'-href'} = href(%href_params);
2966                         $link_attr{'-title'} .= ' (no merges)';
2967                         print "<link ".
2968                               "rel=\"$link_attr{'-rel'}\" ".
2969                               "title=\"$link_attr{'-title'}\" ".
2970                               "href=\"$link_attr{'-href'}\" ".
2971                               "type=\"$link_attr{'-type'}\" ".
2972                               "/>\n";
2973                 }
2974
2975         } else {
2976                 printf('<link rel="alternate" title="%s projects list" '.
2977                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2978                        $site_name, href(project=>undef, action=>"project_index"));
2979                 printf('<link rel="alternate" title="%s projects feeds" '.
2980                        'href="%s" type="text/x-opml" />'."\n",
2981                        $site_name, href(project=>undef, action=>"opml"));
2982         }
2983         if (defined $favicon) {
2984                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2985         }
2986
2987         print "</head>\n" .
2988               "<body>\n";
2989
2990         if (-f $site_header) {
2991                 insert_file($site_header);
2992         }
2993
2994         print "<div class=\"page_header\">\n" .
2995               $cgi->a({-href => esc_url($logo_url),
2996                        -title => $logo_label},
2997                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2998         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2999         if (defined $project) {
3000                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3001                 if (defined $action) {
3002                         print " / $action";
3003                 }
3004                 print "\n";
3005         }
3006         print "</div>\n";
3007
3008         my $have_search = gitweb_check_feature('search');
3009         if (defined $project && $have_search) {
3010                 if (!defined $searchtext) {
3011                         $searchtext = "";
3012                 }
3013                 my $search_hash;
3014                 if (defined $hash_base) {
3015                         $search_hash = $hash_base;
3016                 } elsif (defined $hash) {
3017                         $search_hash = $hash;
3018                 } else {
3019                         $search_hash = "HEAD";
3020                 }
3021                 my $action = $my_uri;
3022                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3023                 if ($use_pathinfo) {
3024                         $action .= "/".esc_url($project);
3025                 }
3026                 print $cgi->startform(-method => "get", -action => $action) .
3027                       "<div class=\"search\">\n" .
3028                       (!$use_pathinfo &&
3029                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3030                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3031                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3032                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3033                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3034                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3035                       " search:\n",
3036                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3037                       "<span title=\"Extended regular expression\">" .
3038                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3039                                      -checked => $search_use_regexp) .
3040                       "</span>" .
3041                       "</div>" .
3042                       $cgi->end_form() . "\n";
3043         }
3044 }
3045
3046 sub git_footer_html {
3047         my $feed_class = 'rss_logo';
3048
3049         print "<div class=\"page_footer\">\n";
3050         if (defined $project) {
3051                 my $descr = git_get_project_description($project);
3052                 if (defined $descr) {
3053                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3054                 }
3055
3056                 my %href_params = get_feed_info();
3057                 if (!%href_params) {
3058                         $feed_class .= ' generic';
3059                 }
3060                 $href_params{'-title'} ||= 'log';
3061
3062                 foreach my $format qw(RSS Atom) {
3063                         $href_params{'action'} = lc($format);
3064                         print $cgi->a({-href => href(%href_params),
3065                                       -title => "$href_params{'-title'} $format feed",
3066                                       -class => $feed_class}, $format)."\n";
3067                 }
3068
3069         } else {
3070                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3071                               -class => $feed_class}, "OPML") . " ";
3072                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3073                               -class => $feed_class}, "TXT") . "\n";
3074         }
3075         print "</div>\n"; # class="page_footer"
3076
3077         if (-f $site_footer) {
3078                 insert_file($site_footer);
3079         }
3080
3081         print "</body>\n" .
3082               "</html>";
3083 }
3084
3085 # die_error(<http_status_code>, <error_message>)
3086 # Example: die_error(404, 'Hash not found')
3087 # By convention, use the following status codes (as defined in RFC 2616):
3088 # 400: Invalid or missing CGI parameters, or
3089 #      requested object exists but has wrong type.
3090 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3091 #      this server or project.
3092 # 404: Requested object/revision/project doesn't exist.
3093 # 500: The server isn't configured properly, or
3094 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3095 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3096 sub die_error {
3097         my $status = shift || 500;
3098         my $error = shift || "Internal server error";
3099
3100         my %http_responses = (400 => '400 Bad Request',
3101                               403 => '403 Forbidden',
3102                               404 => '404 Not Found',
3103                               500 => '500 Internal Server Error');
3104         git_header_html($http_responses{$status});
3105         print <<EOF;
3106 <div class="page_body">
3107 <br /><br />
3108 $status - $error
3109 <br />
3110 </div>
3111 EOF
3112         git_footer_html();
3113         exit;
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## functions printing or outputting HTML: navigation
3118
3119 sub git_print_page_nav {
3120         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3121         $extra = '' if !defined $extra; # pager or formats
3122
3123         my @navs = qw(summary shortlog log commit commitdiff tree);
3124         if ($suppress) {
3125                 @navs = grep { $_ ne $suppress } @navs;
3126         }
3127
3128         my %arg = map { $_ => {action=>$_} } @navs;
3129         if (defined $head) {
3130                 for (qw(commit commitdiff)) {
3131                         $arg{$_}{'hash'} = $head;
3132                 }
3133                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3134                         for (qw(shortlog log)) {
3135                                 $arg{$_}{'hash'} = $head;
3136                         }
3137                 }
3138         }
3139
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         print "<div class=\"page_nav\">\n" .
3161                 (join " | ",
3162                  map { $_ eq $current ?
3163                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3164                  } @navs);
3165         print "<br/>\n$extra<br/>\n" .
3166               "</div>\n";
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 ## ......................................................................
3200 ## functions printing or outputting HTML: div
3201
3202 sub git_print_header_div {
3203         my ($action, $title, $hash, $hash_base) = @_;
3204         my %args = ();
3205
3206         $args{'action'} = $action;
3207         $args{'hash'} = $hash if $hash;
3208         $args{'hash_base'} = $hash_base if $hash_base;
3209
3210         print "<div class=\"header\">\n" .
3211               $cgi->a({-href => href(%args), -class => "title"},
3212               $title ? $title : $action) .
3213               "\n</div>\n";
3214 }
3215
3216 sub git_print_authorship {
3217         my $co = shift;
3218
3219         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3220         print "<div class=\"author_date\">" .
3221               esc_html($co->{'author_name'}) .
3222               " [$ad{'rfc2822'}";
3223         if ($ad{'hour_local'} < 6) {
3224                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3225                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3226         } else {
3227                 printf(" (%02d:%02d %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         }
3230         print "]</div>\n";
3231 }
3232
3233 sub git_print_page_path {
3234         my $name = shift;
3235         my $type = shift;
3236         my $hb = shift;
3237
3238
3239         print "<div class=\"page_path\">";
3240         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3241                       -title => 'tree root'}, to_utf8("[$project]"));
3242         print " / ";
3243         if (defined $name) {
3244                 my @dirname = split '/', $name;
3245                 my $basename = pop @dirname;
3246                 my $fullname = '';
3247
3248                 foreach my $dir (@dirname) {
3249                         $fullname .= ($fullname ? '/' : '') . $dir;
3250                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3251                                                      hash_base=>$hb),
3252                                       -title => $fullname}, esc_path($dir));
3253                         print " / ";
3254                 }
3255                 if (defined $type && $type eq 'blob') {
3256                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3257                                                      hash_base=>$hb),
3258                                       -title => $name}, esc_path($basename));
3259                 } elsif (defined $type && $type eq 'tree') {
3260                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                         print " / ";
3264                 } else {
3265                         print esc_path($basename);
3266                 }
3267         }
3268         print "<br/></div>\n";
3269 }
3270
3271 sub git_print_log {
3272         my $log = shift;
3273         my %opts = @_;
3274
3275         if ($opts{'-remove_title'}) {
3276                 # remove title, i.e. first line of log
3277                 shift @$log;
3278         }
3279         # remove leading empty lines
3280         while (defined $log->[0] && $log->[0] eq "") {
3281                 shift @$log;
3282         }
3283
3284         # print log
3285         my $signoff = 0;
3286         my $empty = 0;
3287         foreach my $line (@$log) {
3288                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3289                         $signoff = 1;
3290                         $empty = 0;
3291                         if (! $opts{'-remove_signoff'}) {
3292                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3293                                 next;
3294                         } else {
3295                                 # remove signoff lines
3296                                 next;
3297                         }
3298                 } else {
3299                         $signoff = 0;
3300                 }
3301
3302                 # print only one empty line
3303                 # do not print empty line after signoff
3304                 if ($line eq "") {
3305                         next if ($empty || $signoff);
3306                         $empty = 1;
3307                 } else {
3308                         $empty = 0;
3309                 }
3310
3311                 print format_log_line_html($line) . "<br/>\n";
3312         }
3313
3314         if ($opts{'-final_empty_line'}) {
3315                 # end with single empty line
3316                 print "<br/>\n" unless $empty;
3317         }
3318 }
3319
3320 # return link target (what link points to)
3321 sub git_get_link_target {
3322         my $hash = shift;
3323         my $link_target;
3324
3325         # read link
3326         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3327                 or return;
3328         {
3329                 local $/;
3330                 $link_target = <$fd>;
3331         }
3332         close $fd
3333                 or return;
3334
3335         return $link_target;
3336 }
3337
3338 # given link target, and the directory (basedir) the link is in,
3339 # return target of link relative to top directory (top tree);
3340 # return undef if it is not possible (including absolute links).
3341 sub normalize_link_target {
3342         my ($link_target, $basedir, $hash_base) = @_;
3343
3344         # we can normalize symlink target only if $hash_base is provided
3345         return unless $hash_base;
3346
3347         # absolute symlinks (beginning with '/') cannot be normalized
3348         return if (substr($link_target, 0, 1) eq '/');
3349
3350         # normalize link target to path from top (root) tree (dir)
3351         my $path;
3352         if ($basedir) {
3353                 $path = $basedir . '/' . $link_target;
3354         } else {
3355                 # we are in top (root) tree (dir)
3356                 $path = $link_target;
3357         }
3358
3359         # remove //, /./, and /../
3360         my @path_parts;
3361         foreach my $part (split('/', $path)) {
3362                 # discard '.' and ''
3363                 next if (!$part || $part eq '.');
3364                 # handle '..'
3365                 if ($part eq '..') {
3366                         if (@path_parts) {
3367                                 pop @path_parts;
3368                         } else {
3369                                 # link leads outside repository (outside top dir)
3370                                 return;
3371                         }
3372                 } else {
3373                         push @path_parts, $part;
3374                 }
3375         }
3376         $path = join('/', @path_parts);
3377
3378         return $path;
3379 }
3380
3381 # print tree entry (row of git_tree), but without encompassing <tr> element
3382 sub git_print_tree_entry {
3383         my ($t, $basedir, $hash_base, $have_blame) = @_;
3384
3385         my %base_key = ();
3386         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3387
3388         # The format of a table row is: mode list link.  Where mode is
3389         # the mode of the entry, list is the name of the entry, an href,
3390         # and link is the action links of the entry.
3391
3392         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3393         if ($t->{'type'} eq "blob") {
3394                 print "<td class=\"list\">" .
3395                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3396                                                file_name=>"$basedir$t->{'name'}", %base_key),
3397                                 -class => "list"}, esc_path($t->{'name'}));
3398                 if (S_ISLNK(oct $t->{'mode'})) {
3399                         my $link_target = git_get_link_target($t->{'hash'});
3400                         if ($link_target) {
3401                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3402                                 if (defined $norm_target) {
3403                                         print " -> " .
3404                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3405                                                                      file_name=>$norm_target),
3406                                                        -title => $norm_target}, esc_path($link_target));
3407                                 } else {
3408                                         print " -> " . esc_path($link_target);
3409                                 }
3410                         }
3411                 }
3412                 print "</td>\n";
3413                 print "<td class=\"link\">";
3414                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3415                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3416                               "blob");
3417                 if ($have_blame) {
3418                         print " | " .
3419                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3420                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3421                                       "blame");
3422                 }
3423                 if (defined $hash_base) {
3424                         print " | " .
3425                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3426                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3427                                       "history");
3428                 }
3429                 print " | " .
3430                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3431                                                file_name=>"$basedir$t->{'name'}")},
3432                                 "raw");
3433                 print "</td>\n";
3434
3435         } elsif ($t->{'type'} eq "tree") {
3436                 print "<td class=\"list\">";
3437                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3438                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3439                               esc_path($t->{'name'}));
3440                 print "</td>\n";
3441                 print "<td class=\"link\">";
3442                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3443                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3444                               "tree");
3445                 if (defined $hash_base) {
3446                         print " | " .
3447                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3448                                                      file_name=>"$basedir$t->{'name'}")},
3449                                       "history");
3450                 }
3451                 print "</td>\n";
3452         } else {
3453                 # unknown object: we can only present history for it
3454                 # (this includes 'commit' object, i.e. submodule support)
3455                 print "<td class=\"list\">" .
3456                       esc_path($t->{'name'}) .
3457                       "</td>\n";
3458                 print "<td class=\"link\">";
3459                 if (defined $hash_base) {
3460                         print $cgi->a({-href => href(action=>"history",
3461                                                      hash_base=>$hash_base,
3462                                                      file_name=>"$basedir$t->{'name'}")},
3463                                       "history");
3464                 }
3465                 print "</td>\n";
3466         }
3467 }
3468
3469 ## ......................................................................
3470 ## functions printing large fragments of HTML
3471
3472 # get pre-image filenames for merge (combined) diff
3473 sub fill_from_file_info {
3474         my ($diff, @parents) = @_;
3475
3476         $diff->{'from_file'} = [ ];
3477         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3478         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3479                 if ($diff->{'status'}[$i] eq 'R' ||
3480                     $diff->{'status'}[$i] eq 'C') {
3481                         $diff->{'from_file'}[$i] =
3482                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3483                 }
3484         }
3485
3486         return $diff;
3487 }
3488
3489 # is current raw difftree line of file deletion
3490 sub is_deleted {
3491         my $diffinfo = shift;
3492
3493         return $diffinfo->{'to_id'} eq ('0' x 40);
3494 }
3495
3496 # does patch correspond to [previous] difftree raw line
3497 # $diffinfo  - hashref of parsed raw diff format
3498 # $patchinfo - hashref of parsed patch diff format
3499 #              (the same keys as in $diffinfo)
3500 sub is_patch_split {
3501         my ($diffinfo, $patchinfo) = @_;
3502
3503         return defined $diffinfo && defined $patchinfo
3504                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3505 }
3506
3507
3508 sub git_difftree_body {
3509         my ($difftree, $hash, @parents) = @_;
3510         my ($parent) = $parents[0];
3511         my $have_blame = gitweb_check_feature('blame');
3512         print "<div class=\"list_head\">\n";
3513         if ($#{$difftree} > 10) {
3514                 print(($#{$difftree} + 1) . " files changed:\n");
3515         }
3516         print "</div>\n";
3517
3518         print "<table class=\"" .
3519               (@parents > 1 ? "combined " : "") .
3520               "diff_tree\">\n";
3521
3522         # header only for combined diff in 'commitdiff' view
3523         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3524         if ($has_header) {
3525                 # table header
3526                 print "<thead><tr>\n" .
3527                        "<th></th><th></th>\n"; # filename, patchN link
3528                 for (my $i = 0; $i < @parents; $i++) {
3529                         my $par = $parents[$i];
3530                         print "<th>" .
3531                               $cgi->a({-href => href(action=>"commitdiff",
3532                                                      hash=>$hash, hash_parent=>$par),
3533                                        -title => 'commitdiff to parent number ' .
3534                                                   ($i+1) . ': ' . substr($par,0,7)},
3535                                       $i+1) .
3536                               "&nbsp;</th>\n";
3537                 }
3538                 print "</tr></thead>\n<tbody>\n";
3539         }
3540
3541         my $alternate = 1;
3542         my $patchno = 0;
3543         foreach my $line (@{$difftree}) {
3544                 my $diff = parsed_difftree_line($line);
3545
3546                 if ($alternate) {
3547                         print "<tr class=\"dark\">\n";
3548                 } else {
3549                         print "<tr class=\"light\">\n";
3550                 }
3551                 $alternate ^= 1;
3552
3553                 if (exists $diff->{'nparents'}) { # combined diff
3554
3555                         fill_from_file_info($diff, @parents)
3556                                 unless exists $diff->{'from_file'};
3557
3558                         if (!is_deleted($diff)) {
3559                                 # file exists in the result (child) commit
3560                                 print "<td>" .
3561                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3562                                                              file_name=>$diff->{'to_file'},
3563                                                              hash_base=>$hash),
3564                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3565                                       "</td>\n";
3566                         } else {
3567                                 print "<td>" .
3568                                       esc_path($diff->{'to_file'}) .
3569                                       "</td>\n";
3570                         }
3571
3572                         if ($action eq 'commitdiff') {
3573                                 # link to patch
3574                                 $patchno++;
3575                                 print "<td class=\"link\">" .
3576                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3577                                       " | " .
3578                                       "</td>\n";
3579                         }
3580
3581                         my $has_history = 0;
3582                         my $not_deleted = 0;
3583                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3584                                 my $hash_parent = $parents[$i];
3585                                 my $from_hash = $diff->{'from_id'}[$i];
3586                                 my $from_path = $diff->{'from_file'}[$i];
3587                                 my $status = $diff->{'status'}[$i];
3588
3589                                 $has_history ||= ($status ne 'A');
3590                                 $not_deleted ||= ($status ne 'D');
3591
3592                                 if ($status eq 'A') {
3593                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3594                                 } elsif ($status eq 'D') {
3595                                         print "<td class=\"link\">" .
3596                                               $cgi->a({-href => href(action=>"blob",
3597                                                                      hash_base=>$hash,
3598                                                                      hash=>$from_hash,
3599                                                                      file_name=>$from_path)},
3600                                                       "blob" . ($i+1)) .
3601                                               " | </td>\n";
3602                                 } else {
3603                                         if ($diff->{'to_id'} eq $from_hash) {
3604                                                 print "<td class=\"link nochange\">";
3605                                         } else {
3606                                                 print "<td class=\"link\">";
3607                                         }
3608                                         print $cgi->a({-href => href(action=>"blobdiff",
3609                                                                      hash=>$diff->{'to_id'},
3610                                                                      hash_parent=>$from_hash,
3611                                                                      hash_base=>$hash,
3612                                                                      hash_parent_base=>$hash_parent,
3613                                                                      file_name=>$diff->{'to_file'},
3614                                                                      file_parent=>$from_path)},
3615                                                       "diff" . ($i+1)) .
3616                                               " | </td>\n";
3617                                 }
3618                         }
3619
3620                         print "<td class=\"link\">";
3621                         if ($not_deleted) {
3622                                 print $cgi->a({-href => href(action=>"blob",
3623                                                              hash=>$diff->{'to_id'},
3624                                                              file_name=>$diff->{'to_file'},
3625                                                              hash_base=>$hash)},
3626                                               "blob");
3627                                 print " | " if ($has_history);
3628                         }
3629                         if ($has_history) {
3630                                 print $cgi->a({-href => href(action=>"history",
3631                                                              file_name=>$diff->{'to_file'},
3632                                                              hash_base=>$hash)},
3633                                               "history");
3634                         }
3635                         print "</td>\n";
3636
3637                         print "</tr>\n";
3638                         next; # instead of 'else' clause, to avoid extra indent
3639                 }
3640                 # else ordinary diff
3641
3642                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3643                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3644                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3645                         $to_mode_oct = oct $diff->{'to_mode'};
3646                         if (S_ISREG($to_mode_oct)) { # only for regular file
3647                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3648                         }
3649                         $to_file_type = file_type($diff->{'to_mode'});
3650                 }
3651                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3652                         $from_mode_oct = oct $diff->{'from_mode'};
3653                         if (S_ISREG($to_mode_oct)) { # only for regular file
3654                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3655                         }
3656                         $from_file_type = file_type($diff->{'from_mode'});
3657                 }
3658
3659                 if ($diff->{'status'} eq "A") { # created
3660                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3661                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3662                         $mode_chng   .= "]</span>";
3663                         print "<td>";
3664                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3665                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3666                                       -class => "list"}, esc_path($diff->{'file'}));
3667                         print "</td>\n";
3668                         print "<td>$mode_chng</td>\n";
3669                         print "<td class=\"link\">";
3670                         if ($action eq 'commitdiff') {
3671                                 # link to patch
3672                                 $patchno++;
3673                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3674                                 print " | ";
3675                         }
3676                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3677                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3678                                       "blob");
3679                         print "</td>\n";
3680
3681                 } elsif ($diff->{'status'} eq "D") { # deleted
3682                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3683                         print "<td>";
3684                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3685                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3686                                        -class => "list"}, esc_path($diff->{'file'}));
3687                         print "</td>\n";
3688                         print "<td>$mode_chng</td>\n";
3689                         print "<td class=\"link\">";
3690                         if ($action eq 'commitdiff') {
3691                                 # link to patch
3692                                 $patchno++;
3693                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3694                                 print " | ";
3695                         }
3696                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3697                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3698                                       "blob") . " | ";
3699                         if ($have_blame) {
3700                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3701                                                              file_name=>$diff->{'file'})},
3702                                               "blame") . " | ";
3703                         }
3704                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3705                                                      file_name=>$diff->{'file'})},
3706                                       "history");
3707                         print "</td>\n";
3708
3709                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3710                         my $mode_chnge = "";
3711                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3712                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3713                                 if ($from_file_type ne $to_file_type) {
3714                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3715                                 }
3716                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3717                                         if ($from_mode_str && $to_mode_str) {
3718                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3719                                         } elsif ($to_mode_str) {
3720                                                 $mode_chnge .= " mode: $to_mode_str";
3721                                         }
3722                                 }
3723                                 $mode_chnge .= "]</span>\n";
3724                         }
3725                         print "<td>";
3726                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3727                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3728                                       -class => "list"}, esc_path($diff->{'file'}));
3729                         print "</td>\n";
3730                         print "<td>$mode_chnge</td>\n";
3731                         print "<td class=\"link\">";
3732                         if ($action eq 'commitdiff') {
3733                                 # link to patch
3734                                 $patchno++;
3735                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3736                                       " | ";
3737                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3738                                 # "commit" view and modified file (not onlu mode changed)
3739                                 print $cgi->a({-href => href(action=>"blobdiff",
3740                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3741                                                              hash_base=>$hash, hash_parent_base=>$parent,
3742                                                              file_name=>$diff->{'file'})},
3743                                               "diff") .
3744                                       " | ";
3745                         }
3746                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3747                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3748                                        "blob") . " | ";
3749                         if ($have_blame) {
3750                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3751                                                              file_name=>$diff->{'file'})},
3752                                               "blame") . " | ";
3753                         }
3754                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3755                                                      file_name=>$diff->{'file'})},
3756                                       "history");
3757                         print "</td>\n";
3758
3759                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3760                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3761                         my $nstatus = $status_name{$diff->{'status'}};
3762                         my $mode_chng = "";
3763                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3764                                 # mode also for directories, so we cannot use $to_mode_str
3765                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3766                         }
3767                         print "<td>" .
3768                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3769                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3770                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3771                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3772                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3773                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3774                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3775                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3776                               "<td class=\"link\">";
3777                         if ($action eq 'commitdiff') {
3778                                 # link to patch
3779                                 $patchno++;
3780                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3781                                       " | ";
3782                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3783                                 # "commit" view and modified file (not only pure rename or copy)
3784                                 print $cgi->a({-href => href(action=>"blobdiff",
3785                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3786                                                              hash_base=>$hash, hash_parent_base=>$parent,
3787                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3788                                               "diff") .
3789                                       " | ";
3790                         }
3791                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3792                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3793                                       "blob") . " | ";
3794                         if ($have_blame) {
3795                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3796                                                              file_name=>$diff->{'to_file'})},
3797                                               "blame") . " | ";
3798                         }
3799                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3800                                                     file_name=>$diff->{'to_file'})},
3801                                       "history");
3802                         print "</td>\n";
3803
3804                 } # we should not encounter Unmerged (U) or Unknown (X) status
3805                 print "</tr>\n";
3806         }
3807         print "</tbody>" if $has_header;
3808         print "</table>\n";
3809 }
3810
3811 sub git_patchset_body {
3812         my ($fd, $difftree, $hash, @hash_parents) = @_;
3813         my ($hash_parent) = $hash_parents[0];
3814
3815         my $is_combined = (@hash_parents > 1);
3816         my $patch_idx = 0;
3817         my $patch_number = 0;
3818         my $patch_line;
3819         my $diffinfo;
3820         my $to_name;
3821         my (%from, %to);
3822
3823         print "<div class=\"patchset\">\n";
3824
3825         # skip to first patch
3826         while ($patch_line = <$fd>) {
3827                 chomp $patch_line;
3828
3829                 last if ($patch_line =~ m/^diff /);
3830         }
3831
3832  PATCH:
3833         while ($patch_line) {
3834
3835                 # parse "git diff" header line
3836                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3837                         # $1 is from_name, which we do not use
3838                         $to_name = unquote($2);
3839                         $to_name =~ s!^b/!!;
3840                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3841                         # $1 is 'cc' or 'combined', which we do not use
3842                         $to_name = unquote($2);
3843                 } else {
3844                         $to_name = undef;
3845                 }
3846
3847                 # check if current patch belong to current raw line
3848                 # and parse raw git-diff line if needed
3849                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3850                         # this is continuation of a split patch
3851                         print "<div class=\"patch cont\">\n";
3852                 } else {
3853                         # advance raw git-diff output if needed
3854                         $patch_idx++ if defined $diffinfo;
3855
3856                         # read and prepare patch information
3857                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3858
3859                         # compact combined diff output can have some patches skipped
3860                         # find which patch (using pathname of result) we are at now;
3861                         if ($is_combined) {
3862                                 while ($to_name ne $diffinfo->{'to_file'}) {
3863                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3864                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3865                                               "</div>\n";  # class="patch"
3866
3867                                         $patch_idx++;
3868                                         $patch_number++;
3869
3870                                         last if $patch_idx > $#$difftree;
3871                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3872                                 }
3873                         }
3874
3875                         # modifies %from, %to hashes
3876                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3877
3878                         # this is first patch for raw difftree line with $patch_idx index
3879                         # we index @$difftree array from 0, but number patches from 1
3880                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3881                 }
3882
3883                 # git diff header
3884                 #assert($patch_line =~ m/^diff /) if DEBUG;
3885                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3886                 $patch_number++;
3887                 # print "git diff" header
3888                 print format_git_diff_header_line($patch_line, $diffinfo,
3889                                                   \%from, \%to);
3890
3891                 # print extended diff header
3892                 print "<div class=\"diff extended_header\">\n";
3893         EXTENDED_HEADER:
3894                 while ($patch_line = <$fd>) {
3895                         chomp $patch_line;
3896
3897                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3898
3899                         print format_extended_diff_header_line($patch_line, $diffinfo,
3900                                                                \%from, \%to);
3901                 }
3902                 print "</div>\n"; # class="diff extended_header"
3903
3904                 # from-file/to-file diff header
3905                 if (! $patch_line) {
3906                         print "</div>\n"; # class="patch"
3907                         last PATCH;
3908                 }
3909                 next PATCH if ($patch_line =~ m/^diff /);
3910                 #assert($patch_line =~ m/^---/) if DEBUG;
3911
3912                 my $last_patch_line = $patch_line;
3913                 $patch_line = <$fd>;
3914                 chomp $patch_line;
3915                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3916
3917                 print format_diff_from_to_header($last_patch_line, $patch_line,
3918                                                  $diffinfo, \%from, \%to,
3919                                                  @hash_parents);
3920
3921                 # the patch itself
3922         LINE:
3923                 while ($patch_line = <$fd>) {
3924                         chomp $patch_line;
3925
3926                         next PATCH if ($patch_line =~ m/^diff /);
3927
3928                         print format_diff_line($patch_line, \%from, \%to);
3929                 }
3930
3931         } continue {
3932                 print "</div>\n"; # class="patch"
3933         }
3934
3935         # for compact combined (--cc) format, with chunk and patch simpliciaction
3936         # patchset might be empty, but there might be unprocessed raw lines
3937         for (++$patch_idx if $patch_number > 0;
3938              $patch_idx < @$difftree;
3939              ++$patch_idx) {
3940                 # read and prepare patch information
3941                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3942
3943                 # generate anchor for "patch" links in difftree / whatchanged part
3944                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3945                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3946                       "</div>\n";  # class="patch"
3947
3948                 $patch_number++;
3949         }
3950
3951         if ($patch_number == 0) {
3952                 if (@hash_parents > 1) {
3953                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3954                 } else {
3955                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3956                 }
3957         }
3958
3959         print "</div>\n"; # class="patchset"
3960 }
3961
3962 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3963
3964 # fills project list info (age, description, owner, forks) for each
3965 # project in the list, removing invalid projects from returned list
3966 # NOTE: modifies $projlist, but does not remove entries from it
3967 sub fill_project_list_info {
3968         my ($projlist, $check_forks) = @_;
3969         my @projects;
3970
3971         my $show_ctags = gitweb_check_feature('ctags');
3972  PROJECT:
3973         foreach my $pr (@$projlist) {
3974                 my (@activity) = git_get_last_activity($pr->{'path'});
3975                 unless (@activity) {
3976                         next PROJECT;
3977                 }
3978                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3979                 if (!defined $pr->{'descr'}) {
3980                         my $descr = git_get_project_description($pr->{'path'}) || "";
3981                         $descr = to_utf8($descr);
3982                         $pr->{'descr_long'} = $descr;
3983                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3984                 }
3985                 if (!defined $pr->{'owner'}) {
3986                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3987                 }
3988                 if ($check_forks) {
3989                         my $pname = $pr->{'path'};
3990                         if (($pname =~ s/\.git$//) &&
3991                             ($pname !~ /\/$/) &&
3992                             (-d "$projectroot/$pname")) {
3993                                 $pr->{'forks'} = "-d $projectroot/$pname";
3994                         }       else {
3995                                 $pr->{'forks'} = 0;
3996                         }
3997                 }
3998                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3999                 push @projects, $pr;
4000         }
4001
4002         return @projects;
4003 }
4004
4005 # print 'sort by' <th> element, generating 'sort by $name' replay link
4006 # if that order is not selected
4007 sub print_sort_th {
4008         my ($name, $order, $header) = @_;
4009         $header ||= ucfirst($name);
4010
4011         if ($order eq $name) {
4012                 print "<th>$header</th>\n";
4013         } else {
4014                 print "<th>" .
4015                       $cgi->a({-href => href(-replay=>1, order=>$name),
4016                                -class => "header"}, $header) .
4017                       "</th>\n";
4018         }
4019 }
4020
4021 sub git_project_list_body {
4022         # actually uses global variable $project
4023         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4024
4025         my $check_forks = gitweb_check_feature('forks');
4026         my @projects = fill_project_list_info($projlist, $check_forks);
4027
4028         $order ||= $default_projects_order;
4029         $from = 0 unless defined $from;
4030         $to = $#projects if (!defined $to || $#projects < $to);
4031
4032         my %order_info = (
4033                 project => { key => 'path', type => 'str' },
4034                 descr => { key => 'descr_long', type => 'str' },
4035                 owner => { key => 'owner', type => 'str' },
4036                 age => { key => 'age', type => 'num' }
4037         );
4038         my $oi = $order_info{$order};
4039         if ($oi->{'type'} eq 'str') {
4040                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4041         } else {
4042                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4043         }
4044
4045         my $show_ctags = gitweb_check_feature('ctags');
4046         if ($show_ctags) {
4047                 my %ctags;
4048                 foreach my $p (@projects) {
4049                         foreach my $ct (keys %{$p->{'ctags'}}) {
4050                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4051                         }
4052                 }
4053                 my $cloud = git_populate_project_tagcloud(\%ctags);
4054                 print git_show_project_tagcloud($cloud, 64);
4055         }
4056
4057         print "<table class=\"project_list\">\n";
4058         unless ($no_header) {
4059                 print "<tr>\n";
4060                 if ($check_forks) {
4061                         print "<th></th>\n";
4062                 }
4063                 print_sort_th('project', $order, 'Project');
4064                 print_sort_th('descr', $order, 'Description');
4065                 print_sort_th('owner', $order, 'Owner');
4066                 print_sort_th('age', $order, 'Last Change');
4067                 print "<th></th>\n" . # for links
4068                       "</tr>\n";
4069         }
4070         my $alternate = 1;
4071         my $tagfilter = $cgi->param('by_tag');
4072         for (my $i = $from; $i <= $to; $i++) {
4073                 my $pr = $projects[$i];
4074
4075                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4076                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4077                         and not $pr->{'descr_long'} =~ /$searchtext/;
4078                 # Weed out forks or non-matching entries of search
4079                 if ($check_forks) {
4080                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4081                         $forkbase="^$forkbase" if $forkbase;
4082                         next if not $searchtext and not $tagfilter and $show_ctags
4083                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4084                 }
4085
4086                 if ($alternate) {
4087                         print "<tr class=\"dark\">\n";
4088                 } else {
4089                         print "<tr class=\"light\">\n";
4090                 }
4091                 $alternate ^= 1;
4092                 if ($check_forks) {
4093                         print "<td>";
4094                         if ($pr->{'forks'}) {
4095                                 print "<!-- $pr->{'forks'} -->\n";
4096                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4097                         }
4098                         print "</td>\n";
4099                 }
4100                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4101                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4102                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4103                                         -class => "list", -title => $pr->{'descr_long'}},
4104                                         esc_html($pr->{'descr'})) . "</td>\n" .
4105                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4106                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4107                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4108                       "<td class=\"link\">" .
4109                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4113                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4114                       "</td>\n" .
4115                       "</tr>\n";
4116         }
4117         if (defined $extra) {
4118                 print "<tr>\n";
4119                 if ($check_forks) {
4120                         print "<td></td>\n";
4121                 }
4122                 print "<td colspan=\"5\">$extra</td>\n" .
4123                       "</tr>\n";
4124         }
4125         print "</table>\n";
4126 }
4127
4128 sub git_shortlog_body {
4129         # uses global variable $project
4130         my ($commitlist, $from, $to, $refs, $extra) = @_;
4131
4132         $from = 0 unless defined $from;
4133         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4134
4135         print "<table class=\"shortlog\">\n";
4136         my $alternate = 1;
4137         for (my $i = $from; $i <= $to; $i++) {
4138                 my %co = %{$commitlist->[$i]};
4139                 my $commit = $co{'id'};
4140                 my $ref = format_ref_marker($refs, $commit);
4141                 if ($alternate) {
4142                         print "<tr class=\"dark\">\n";
4143                 } else {
4144                         print "<tr class=\"light\">\n";
4145                 }
4146                 $alternate ^= 1;
4147                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4148                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4149                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4150                       "<td><i>" . $author . "</i></td>\n" .
4151                       "<td>";
4152                 print format_subject_html($co{'title'}, $co{'title_short'},
4153                                           href(action=>"commit", hash=>$commit), $ref);
4154                 print "</td>\n" .
4155                       "<td class=\"link\">" .
4156                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4157                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4158                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4159                 my $snapshot_links = format_snapshot_links($commit);
4160                 if (defined $snapshot_links) {
4161                         print " | " . $snapshot_links;
4162                 }
4163                 print "</td>\n" .
4164                       "</tr>\n";
4165         }
4166         if (defined $extra) {
4167                 print "<tr>\n" .
4168                       "<td colspan=\"4\">$extra</td>\n" .
4169                       "</tr>\n";
4170         }
4171         print "</table>\n";
4172 }
4173
4174 sub git_history_body {
4175         # Warning: assumes constant type (blob or tree) during history
4176         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4177
4178         $from = 0 unless defined $from;
4179         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4180
4181         print "<table class=\"history\">\n";
4182         my $alternate = 1;
4183         for (my $i = $from; $i <= $to; $i++) {
4184                 my %co = %{$commitlist->[$i]};
4185                 if (!%co) {
4186                         next;
4187                 }
4188                 my $commit = $co{'id'};
4189
4190                 my $ref = format_ref_marker($refs, $commit);
4191
4192                 if ($alternate) {
4193                         print "<tr class=\"dark\">\n";
4194                 } else {
4195                         print "<tr class=\"light\">\n";
4196                 }
4197                 $alternate ^= 1;
4198         # shortlog uses      chop_str($co{'author_name'}, 10)
4199                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4200                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4201                       "<td><i>" . $author . "</i></td>\n" .
4202                       "<td>";
4203                 # originally git_history used chop_str($co{'title'}, 50)
4204                 print format_subject_html($co{'title'}, $co{'title_short'},
4205                                           href(action=>"commit", hash=>$commit), $ref);
4206                 print "</td>\n" .
4207                       "<td class=\"link\">" .
4208                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4209                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4210
4211                 if ($ftype eq 'blob') {
4212                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4213                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4214                         if (defined $blob_current && defined $blob_parent &&
4215                                         $blob_current ne $blob_parent) {
4216                                 print " | " .
4217                                         $cgi->a({-href => href(action=>"blobdiff",
4218                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4219                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4220                                                                file_name=>$file_name)},
4221                                                 "diff to current");
4222                         }
4223                 }
4224                 print "</td>\n" .
4225                       "</tr>\n";
4226         }
4227         if (defined $extra) {
4228                 print "<tr>\n" .
4229                       "<td colspan=\"4\">$extra</td>\n" .
4230                       "</tr>\n";
4231         }
4232         print "</table>\n";
4233 }
4234
4235 sub git_tags_body {
4236         # uses global variable $project
4237         my ($taglist, $from, $to, $extra) = @_;
4238         $from = 0 unless defined $from;
4239         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4240
4241         print "<table class=\"tags\">\n";
4242         my $alternate = 1;
4243         for (my $i = $from; $i <= $to; $i++) {
4244                 my $entry = $taglist->[$i];
4245                 my %tag = %$entry;
4246                 my $comment = $tag{'subject'};
4247                 my $comment_short;
4248                 if (defined $comment) {
4249                         $comment_short = chop_str($comment, 30, 5);
4250                 }
4251                 if ($alternate) {
4252                         print "<tr class=\"dark\">\n";
4253                 } else {
4254                         print "<tr class=\"light\">\n";
4255                 }
4256                 $alternate ^= 1;
4257                 if (defined $tag{'age'}) {
4258                         print "<td><i>$tag{'age'}</i></td>\n";
4259                 } else {
4260                         print "<td></td>\n";
4261                 }
4262                 print "<td>" .
4263                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4264                                -class => "list name"}, esc_html($tag{'name'})) .
4265                       "</td>\n" .
4266                       "<td>";
4267                 if (defined $comment) {
4268                         print format_subject_html($comment, $comment_short,
4269                                                   href(action=>"tag", hash=>$tag{'id'}));
4270                 }
4271                 print "</td>\n" .
4272                       "<td class=\"selflink\">";
4273                 if ($tag{'type'} eq "tag") {
4274                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4275                 } else {
4276                         print "&nbsp;";
4277                 }
4278                 print "</td>\n" .
4279                       "<td class=\"link\">" . " | " .
4280                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4281                 if ($tag{'reftype'} eq "commit") {
4282                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4283                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4284                 } elsif ($tag{'reftype'} eq "blob") {
4285                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4286                 }
4287                 print "</td>\n" .
4288                       "</tr>";
4289         }
4290         if (defined $extra) {
4291                 print "<tr>\n" .
4292                       "<td colspan=\"5\">$extra</td>\n" .
4293                       "</tr>\n";
4294         }
4295         print "</table>\n";
4296 }
4297
4298 sub git_heads_body {
4299         # uses global variable $project
4300         my ($headlist, $head, $from, $to, $extra) = @_;
4301         $from = 0 unless defined $from;
4302         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4303
4304         print "<table class=\"heads\">\n";
4305         my $alternate = 1;
4306         for (my $i = $from; $i <= $to; $i++) {
4307                 my $entry = $headlist->[$i];
4308                 my %ref = %$entry;
4309                 my $curr = $ref{'id'} eq $head;
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316                 print "<td><i>$ref{'age'}</i></td>\n" .
4317                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4318                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4319                                -class => "list name"},esc_html($ref{'name'})) .
4320                       "</td>\n" .
4321                       "<td class=\"link\">" .
4322                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4323                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4324                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4325                       "</td>\n" .
4326                       "</tr>";
4327         }
4328         if (defined $extra) {
4329                 print "<tr>\n" .
4330                       "<td colspan=\"3\">$extra</td>\n" .
4331                       "</tr>\n";
4332         }
4333         print "</table>\n";
4334 }
4335
4336 sub git_search_grep_body {
4337         my ($commitlist, $from, $to, $extra) = @_;
4338         $from = 0 unless defined $from;
4339         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4340
4341         print "<table class=\"commit_search\">\n";
4342         my $alternate = 1;
4343         for (my $i = $from; $i <= $to; $i++) {
4344                 my %co = %{$commitlist->[$i]};
4345                 if (!%co) {
4346                         next;
4347                 }
4348                 my $commit = $co{'id'};
4349                 if ($alternate) {
4350                         print "<tr class=\"dark\">\n";
4351                 } else {
4352                         print "<tr class=\"light\">\n";
4353                 }
4354                 $alternate ^= 1;
4355                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4356                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4357                       "<td><i>" . $author . "</i></td>\n" .
4358                       "<td>" .
4359                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4360                                -class => "list subject"},
4361                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4362                 my $comment = $co{'comment'};
4363                 foreach my $line (@$comment) {
4364                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4365                                 my ($lead, $match, $trail) = ($1, $2, $3);
4366                                 $match = chop_str($match, 70, 5, 'center');
4367                                 my $contextlen = int((80 - length($match))/2);
4368                                 $contextlen = 30 if ($contextlen > 30);
4369                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4370                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4371
4372                                 $lead  = esc_html($lead);
4373                                 $match = esc_html($match);
4374                                 $trail = esc_html($trail);
4375
4376                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4377                         }
4378                 }
4379                 print "</td>\n" .
4380                       "<td class=\"link\">" .
4381                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4382                       " | " .
4383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4384                       " | " .
4385                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4386                 print "</td>\n" .
4387                       "</tr>\n";
4388         }
4389         if (defined $extra) {
4390                 print "<tr>\n" .
4391                       "<td colspan=\"3\">$extra</td>\n" .
4392                       "</tr>\n";
4393         }
4394         print "</table>\n";
4395 }
4396
4397 ## ======================================================================
4398 ## ======================================================================
4399 ## actions
4400
4401 sub git_project_list {
4402         my $order = $input_params{'order'};
4403         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4404                 die_error(400, "Unknown order parameter");
4405         }
4406
4407         my @list = git_get_projects_list();
4408         if (!@list) {
4409                 die_error(404, "No projects found");
4410         }
4411
4412         git_header_html();
4413         if (-f $home_text) {
4414                 print "<div class=\"index_include\">\n";
4415                 insert_file($home_text);
4416                 print "</div>\n";
4417         }
4418         print $cgi->startform(-method => "get") .
4419               "<p class=\"projsearch\">Search:\n" .
4420               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4421               "</p>" .
4422               $cgi->end_form() . "\n";
4423         git_project_list_body(\@list, $order);
4424         git_footer_html();
4425 }
4426
4427 sub git_forks {
4428         my $order = $input_params{'order'};
4429         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4430                 die_error(400, "Unknown order parameter");
4431         }
4432
4433         my @list = git_get_projects_list($project);
4434         if (!@list) {
4435                 die_error(404, "No forks found");
4436         }
4437
4438         git_header_html();
4439         git_print_page_nav('','');
4440         git_print_header_div('summary', "$project forks");
4441         git_project_list_body(\@list, $order);
4442         git_footer_html();
4443 }
4444
4445 sub git_project_index {
4446         my @projects = git_get_projects_list($project);
4447
4448         print $cgi->header(
4449                 -type => 'text/plain',
4450                 -charset => 'utf-8',
4451                 -content_disposition => 'inline; filename="index.aux"');
4452
4453         foreach my $pr (@projects) {
4454                 if (!exists $pr->{'owner'}) {
4455                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4456                 }
4457
4458                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4459                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4460                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4461                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4462                 $path  =~ s/ /\+/g;
4463                 $owner =~ s/ /\+/g;
4464
4465                 print "$path $owner\n";
4466         }
4467 }
4468
4469 sub git_summary {
4470         my $descr = git_get_project_description($project) || "none";
4471         my %co = parse_commit("HEAD");
4472         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4473         my $head = $co{'id'};
4474
4475         my $owner = git_get_project_owner($project);
4476
4477         my $refs = git_get_references();
4478         # These get_*_list functions return one more to allow us to see if
4479         # there are more ...
4480         my @taglist  = git_get_tags_list(16);
4481         my @headlist = git_get_heads_list(16);
4482         my @forklist;
4483         my $check_forks = gitweb_check_feature('forks');
4484
4485         if ($check_forks) {
4486                 @forklist = git_get_projects_list($project);
4487         }
4488
4489         git_header_html();
4490         git_print_page_nav('summary','', $head);
4491
4492         print "<div class=\"title\">&nbsp;</div>\n";
4493         print "<table class=\"projects_list\">\n" .
4494               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4495               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4496         if (defined $cd{'rfc2822'}) {
4497                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4498         }
4499
4500         # use per project git URL list in $projectroot/$project/cloneurl
4501         # or make project git URL from git base URL and project name
4502         my $url_tag = "URL";
4503         my @url_list = git_get_project_url_list($project);
4504         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4505         foreach my $git_url (@url_list) {
4506                 next unless $git_url;
4507                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4508                 $url_tag = "";
4509         }
4510
4511         # Tag cloud
4512         my $show_ctags = gitweb_check_feature('ctags');
4513         if ($show_ctags) {
4514                 my $ctags = git_get_project_ctags($project);
4515                 my $cloud = git_populate_project_tagcloud($ctags);
4516                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4517                 print "</td>\n<td>" unless %$ctags;
4518                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4519                 print "</td>\n<td>" if %$ctags;
4520                 print git_show_project_tagcloud($cloud, 48);
4521                 print "</td></tr>";
4522         }
4523
4524         print "</table>\n";
4525
4526         # If XSS prevention is on, we don't include README.html.
4527         # TODO: Allow a readme in some safe format.
4528         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4529                 print "<div class=\"title\">readme</div>\n" .
4530                       "<div class=\"readme\">\n";
4531                 insert_file("$projectroot/$project/README.html");
4532                 print "\n</div>\n"; # class="readme"
4533         }
4534
4535         # we need to request one more than 16 (0..15) to check if
4536         # those 16 are all
4537         my @commitlist = $head ? parse_commits($head, 17) : ();
4538         if (@commitlist) {
4539                 git_print_header_div('shortlog');
4540                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4541                                   $#commitlist <=  15 ? undef :
4542                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4543         }
4544
4545         if (@taglist) {
4546                 git_print_header_div('tags');
4547                 git_tags_body(\@taglist, 0, 15,
4548                               $#taglist <=  15 ? undef :
4549                               $cgi->a({-href => href(action=>"tags")}, "..."));
4550         }
4551
4552         if (@headlist) {
4553                 git_print_header_div('heads');
4554                 git_heads_body(\@headlist, $head, 0, 15,
4555                                $#headlist <= 15 ? undef :
4556                                $cgi->a({-href => href(action=>"heads")}, "..."));
4557         }
4558
4559         if (@forklist) {
4560                 git_print_header_div('forks');
4561                 git_project_list_body(\@forklist, 'age', 0, 15,
4562                                       $#forklist <= 15 ? undef :
4563                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4564                                       'no_header');
4565         }
4566
4567         git_footer_html();
4568 }
4569
4570 sub git_tag {
4571         my $head = git_get_head_hash($project);
4572         git_header_html();
4573         git_print_page_nav('','', $head,undef,$head);
4574         my %tag = parse_tag($hash);
4575
4576         if (! %tag) {
4577                 die_error(404, "Unknown tag object");
4578         }
4579
4580         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4581         print "<div class=\"title_text\">\n" .
4582               "<table class=\"object_header\">\n" .
4583               "<tr>\n" .
4584               "<td>object</td>\n" .
4585               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4586                                $tag{'object'}) . "</td>\n" .
4587               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4588                                               $tag{'type'}) . "</td>\n" .
4589               "</tr>\n";
4590         if (defined($tag{'author'})) {
4591                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4592                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4593                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4594                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4595                         "</td></tr>\n";
4596         }
4597         print "</table>\n\n" .
4598               "</div>\n";
4599         print "<div class=\"page_body\">";
4600         my $comment = $tag{'comment'};
4601         foreach my $line (@$comment) {
4602                 chomp $line;
4603                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4604         }
4605         print "</div>\n";
4606         git_footer_html();
4607 }
4608
4609 sub git_blame {
4610         # permissions
4611         gitweb_check_feature('blame')
4612                 or die_error(403, "Blame view not allowed");
4613
4614         # error checking
4615         die_error(400, "No file name given") unless $file_name;
4616         $hash_base ||= git_get_head_hash($project);
4617         die_error(404, "Couldn't find base commit") unless $hash_base;
4618         my %co = parse_commit($hash_base)
4619                 or die_error(404, "Commit not found");
4620         my $ftype = "blob";
4621         if (!defined $hash) {
4622                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4623                         or die_error(404, "Error looking up file");
4624         } else {
4625                 $ftype = git_get_type($hash);
4626                 if ($ftype !~ "blob") {
4627                         die_error(400, "Object is not a blob");
4628                 }
4629         }
4630
4631         # run git-blame --porcelain
4632         open my $fd, "-|", git_cmd(), "blame", '-p',
4633                 $hash_base, '--', $file_name
4634                 or die_error(500, "Open git-blame failed");
4635
4636         # page header
4637         git_header_html();
4638         my $formats_nav =
4639                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4640                         "blob") .
4641                 " | " .
4642                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4643                         "history") .
4644                 " | " .
4645                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4646                         "HEAD");
4647         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4648         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4649         git_print_page_path($file_name, $ftype, $hash_base);
4650
4651         # page body
4652         my @rev_color = qw(light2 dark2);
4653         my $num_colors = scalar(@rev_color);
4654         my $current_color = 0;
4655         my %metainfo = ();
4656
4657         print <<HTML;
4658 <div class="page_body">
4659 <table class="blame">
4660 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4661 HTML
4662  LINE:
4663         while (my $line = <$fd>) {
4664                 chomp $line;
4665                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4666                 # no <lines in group> for subsequent lines in group of lines
4667                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4668                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4669                 if (!exists $metainfo{$full_rev}) {
4670                         $metainfo{$full_rev} = {};
4671                 }
4672                 my $meta = $metainfo{$full_rev};
4673                 my $data;
4674                 while ($data = <$fd>) {
4675                         chomp $data;
4676                         last if ($data =~ s/^\t//); # contents of line
4677                         if ($data =~ /^(\S+) (.*)$/) {
4678                                 $meta->{$1} = $2;
4679                         }
4680                 }
4681                 my $short_rev = substr($full_rev, 0, 8);
4682                 my $author = $meta->{'author'};
4683                 my %date =
4684                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4685                 my $date = $date{'iso-tz'};
4686                 if ($group_size) {
4687                         $current_color = ($current_color + 1) % $num_colors;
4688                 }
4689                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4690                 if ($group_size) {
4691                         print "<td class=\"sha1\"";
4692                         print " title=\"". esc_html($author) . ", $date\"";
4693                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4694                         print ">";
4695                         print $cgi->a({-href => href(action=>"commit",
4696                                                      hash=>$full_rev,
4697                                                      file_name=>$file_name)},
4698                                       esc_html($short_rev));
4699                         print "</td>\n";
4700                 }
4701                 my $parent_commit;
4702                 if (!exists $meta->{'parent'}) {
4703                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4704                                 or die_error(500, "Open git-rev-parse failed");
4705                         $parent_commit = <$dd>;
4706                         close $dd;
4707                         chomp($parent_commit);
4708                         $meta->{'parent'} = $parent_commit;
4709                 } else {
4710                         $parent_commit = $meta->{'parent'};
4711                 }
4712                 my $blamed = href(action => 'blame',
4713                                   file_name => $meta->{'filename'},
4714                                   hash_base => $parent_commit);
4715                 print "<td class=\"linenr\">";
4716                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4717                                 -class => "linenr" },
4718                               esc_html($lineno));
4719                 print "</td>";
4720                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4721                 print "</tr>\n";
4722         }
4723         print "</table>\n";
4724         print "</div>";
4725         close $fd
4726                 or print "Reading blob failed\n";
4727
4728         # page footer
4729         git_footer_html();
4730 }
4731
4732 sub git_tags {
4733         my $head = git_get_head_hash($project);
4734         git_header_html();
4735         git_print_page_nav('','', $head,undef,$head);
4736         git_print_header_div('summary', $project);
4737
4738         my @tagslist = git_get_tags_list();
4739         if (@tagslist) {
4740                 git_tags_body(\@tagslist);
4741         }
4742         git_footer_html();
4743 }
4744
4745 sub git_heads {
4746         my $head = git_get_head_hash($project);
4747         git_header_html();
4748         git_print_page_nav('','', $head,undef,$head);
4749         git_print_header_div('summary', $project);
4750
4751         my @headslist = git_get_heads_list();
4752         if (@headslist) {
4753                 git_heads_body(\@headslist, $head);
4754         }
4755         git_footer_html();
4756 }
4757
4758 sub git_blob_plain {
4759         my $type = shift;
4760         my $expires;
4761
4762         if (!defined $hash) {
4763                 if (defined $file_name) {
4764                         my $base = $hash_base || git_get_head_hash($project);
4765                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4766                                 or die_error(404, "Cannot find file");
4767                 } else {
4768                         die_error(400, "No file name defined");
4769                 }
4770         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4771                 # blobs defined by non-textual hash id's can be cached
4772                 $expires = "+1d";
4773         }
4774
4775         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4776                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4777
4778         # content-type (can include charset)
4779         $type = blob_contenttype($fd, $file_name, $type);
4780
4781         # "save as" filename, even when no $file_name is given
4782         my $save_as = "$hash";
4783         if (defined $file_name) {
4784                 $save_as = $file_name;
4785         } elsif ($type =~ m/^text\//) {
4786                 $save_as .= '.txt';
4787         }
4788
4789         # With XSS prevention on, blobs of all types except a few known safe
4790         # ones are served with "Content-Disposition: attachment" to make sure
4791         # they don't run in our security domain.  For certain image types,
4792         # blob view writes an <img> tag referring to blob_plain view, and we
4793         # want to be sure not to break that by serving the image as an
4794         # attachment (though Firefox 3 doesn't seem to care).
4795         my $sandbox = $prevent_xss &&
4796                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4797
4798         print $cgi->header(
4799                 -type => $type,
4800                 -expires => $expires,
4801                 -content_disposition =>
4802                         ($sandbox ? 'attachment' : 'inline')
4803                         . '; filename="' . $save_as . '"');
4804         undef $/;
4805         binmode STDOUT, ':raw';
4806         print <$fd>;
4807         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4808         $/ = "\n";
4809         close $fd;
4810 }
4811
4812 sub git_blob {
4813         my $expires;
4814
4815         if (!defined $hash) {
4816                 if (defined $file_name) {
4817                         my $base = $hash_base || git_get_head_hash($project);
4818                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4819                                 or die_error(404, "Cannot find file");
4820                 } else {
4821                         die_error(400, "No file name defined");
4822                 }
4823         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4824                 # blobs defined by non-textual hash id's can be cached
4825                 $expires = "+1d";
4826         }
4827
4828         my $have_blame = gitweb_check_feature('blame');
4829         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4830                 or die_error(500, "Couldn't cat $file_name, $hash");
4831         my $mimetype = blob_mimetype($fd, $file_name);
4832         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4833                 close $fd;
4834                 return git_blob_plain($mimetype);
4835         }
4836         # we can have blame only for text/* mimetype
4837         $have_blame &&= ($mimetype =~ m!^text/!);
4838
4839         git_header_html(undef, $expires);
4840         my $formats_nav = '';
4841         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4842                 if (defined $file_name) {
4843                         if ($have_blame) {
4844                                 $formats_nav .=
4845                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4846                                                 "blame") .
4847                                         " | ";
4848                         }
4849                         $formats_nav .=
4850                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4851                                         "history") .
4852                                 " | " .
4853                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4854                                         "raw") .
4855                                 " | " .
4856                                 $cgi->a({-href => href(action=>"blob",
4857                                                        hash_base=>"HEAD", file_name=>$file_name)},
4858                                         "HEAD");
4859                 } else {
4860                         $formats_nav .=
4861                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4862                                         "raw");
4863                 }
4864                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4865                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4866         } else {
4867                 print "<div class=\"page_nav\">\n" .
4868                       "<br/><br/></div>\n" .
4869                       "<div class=\"title\">$hash</div>\n";
4870         }
4871         git_print_page_path($file_name, "blob", $hash_base);
4872         print "<div class=\"page_body\">\n";
4873         if ($mimetype =~ m!^image/!) {
4874                 print qq!<img type="$mimetype"!;
4875                 if ($file_name) {
4876                         print qq! alt="$file_name" title="$file_name"!;
4877                 }
4878                 print qq! src="! .
4879                       href(action=>"blob_plain", hash=>$hash,
4880                            hash_base=>$hash_base, file_name=>$file_name) .
4881                       qq!" />\n!;
4882         } else {
4883                 my $nr;
4884                 while (my $line = <$fd>) {
4885                         chomp $line;
4886                         $nr++;
4887                         $line = untabify($line);
4888                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4889                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4890                 }
4891         }
4892         close $fd
4893                 or print "Reading blob failed.\n";
4894         print "</div>";
4895         git_footer_html();
4896 }
4897
4898 sub git_tree {
4899         if (!defined $hash_base) {
4900                 $hash_base = "HEAD";
4901         }
4902         if (!defined $hash) {
4903                 if (defined $file_name) {
4904                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4905                 } else {
4906                         $hash = $hash_base;
4907                 }
4908         }
4909         die_error(404, "No such tree") unless defined($hash);
4910         $/ = "\0";
4911         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4912                 or die_error(500, "Open git-ls-tree failed");
4913         my @entries = map { chomp; $_ } <$fd>;
4914         close $fd or die_error(404, "Reading tree failed");
4915         $/ = "\n";
4916
4917         my $refs = git_get_references();
4918         my $ref = format_ref_marker($refs, $hash_base);
4919         git_header_html();
4920         my $basedir = '';
4921         my $have_blame = gitweb_check_feature('blame');
4922         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4923                 my @views_nav = ();
4924                 if (defined $file_name) {
4925                         push @views_nav,
4926                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4927                                         "history"),
4928                                 $cgi->a({-href => href(action=>"tree",
4929                                                        hash_base=>"HEAD", file_name=>$file_name)},
4930                                         "HEAD"),
4931                 }
4932                 my $snapshot_links = format_snapshot_links($hash);
4933                 if (defined $snapshot_links) {
4934                         # FIXME: Should be available when we have no hash base as well.
4935                         push @views_nav, $snapshot_links;
4936                 }
4937                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4938                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4939         } else {
4940                 undef $hash_base;
4941                 print "<div class=\"page_nav\">\n";
4942                 print "<br/><br/></div>\n";
4943                 print "<div class=\"title\">$hash</div>\n";
4944         }
4945         if (defined $file_name) {
4946                 $basedir = $file_name;
4947                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4948                         $basedir .= '/';
4949                 }
4950                 git_print_page_path($file_name, 'tree', $hash_base);
4951         }
4952         print "<div class=\"page_body\">\n";
4953         print "<table class=\"tree\">\n";
4954         my $alternate = 1;
4955         # '..' (top directory) link if possible
4956         if (defined $hash_base &&
4957             defined $file_name && $file_name =~ m![^/]+$!) {
4958                 if ($alternate) {
4959                         print "<tr class=\"dark\">\n";
4960                 } else {
4961                         print "<tr class=\"light\">\n";
4962                 }
4963                 $alternate ^= 1;
4964
4965                 my $up = $file_name;
4966                 $up =~ s!/?[^/]+$!!;
4967                 undef $up unless $up;
4968                 # based on git_print_tree_entry
4969                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4970                 print '<td class="list">';
4971                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4972                                              file_name=>$up)},
4973                               "..");
4974                 print "</td>\n";
4975                 print "<td class=\"link\"></td>\n";
4976
4977                 print "</tr>\n";
4978         }
4979         foreach my $line (@entries) {
4980                 my %t = parse_ls_tree_line($line, -z => 1);
4981
4982                 if ($alternate) {
4983                         print "<tr class=\"dark\">\n";
4984                 } else {
4985                         print "<tr class=\"light\">\n";
4986                 }
4987                 $alternate ^= 1;
4988
4989                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4990
4991                 print "</tr>\n";
4992         }
4993         print "</table>\n" .
4994               "</div>";
4995         git_footer_html();
4996 }
4997
4998 sub git_snapshot {
4999         my $format = $input_params{'snapshot_format'};
5000         if (!@snapshot_fmts) {
5001                 die_error(403, "Snapshots not allowed");
5002         }
5003         # default to first supported snapshot format
5004         $format ||= $snapshot_fmts[0];
5005         if ($format !~ m/^[a-z0-9]+$/) {
5006                 die_error(400, "Invalid snapshot format parameter");
5007         } elsif (!exists($known_snapshot_formats{$format})) {
5008                 die_error(400, "Unknown snapshot format");
5009         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5010                 die_error(403, "Unsupported snapshot format");
5011         }
5012
5013         if (!defined $hash) {
5014                 $hash = git_get_head_hash($project);
5015         }
5016
5017         my $name = $project;
5018         $name =~ s,([^/])/*\.git$,$1,;
5019         $name = basename($name);
5020         my $filename = to_utf8($name);
5021         $name =~ s/\047/\047\\\047\047/g;
5022         my $cmd;
5023         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5024         $cmd = quote_command(
5025                 git_cmd(), 'archive',
5026                 "--format=$known_snapshot_formats{$format}{'format'}",
5027                 "--prefix=$name/", $hash);
5028         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5029                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5030         }
5031
5032         print $cgi->header(
5033                 -type => $known_snapshot_formats{$format}{'type'},
5034                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5035                 -status => '200 OK');
5036
5037         open my $fd, "-|", $cmd
5038                 or die_error(500, "Execute git-archive failed");
5039         binmode STDOUT, ':raw';
5040         print <$fd>;
5041         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5042         close $fd;
5043 }
5044
5045 sub git_log {
5046         my $head = git_get_head_hash($project);
5047         if (!defined $hash) {
5048                 $hash = $head;
5049         }
5050         if (!defined $page) {
5051                 $page = 0;
5052         }
5053         my $refs = git_get_references();
5054
5055         my @commitlist = parse_commits($hash, 101, (100 * $page));
5056
5057         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5058
5059         my ($patch_max) = gitweb_get_feature('patches');
5060         if ($patch_max) {
5061                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5062                         $paging_nav .= " &sdot; " .
5063                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5064                                         "patches");
5065                 }
5066         }
5067
5068         git_header_html();
5069         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5070
5071         if (!@commitlist) {
5072                 my %co = parse_commit($hash);
5073
5074                 git_print_header_div('summary', $project);
5075                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5076         }
5077         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5078         for (my $i = 0; $i <= $to; $i++) {
5079                 my %co = %{$commitlist[$i]};
5080                 next if !%co;
5081                 my $commit = $co{'id'};
5082                 my $ref = format_ref_marker($refs, $commit);
5083                 my %ad = parse_date($co{'author_epoch'});
5084                 git_print_header_div('commit',
5085                                "<span class=\"age\">$co{'age_string'}</span>" .
5086                                esc_html($co{'title'}) . $ref,
5087                                $commit);
5088                 print "<div class=\"title_text\">\n" .
5089                       "<div class=\"log_link\">\n" .
5090                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5091                       " | " .
5092                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5093                       " | " .
5094                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5095                       "<br/>\n" .
5096                       "</div>\n" .
5097                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5098                       "</div>\n";
5099
5100                 print "<div class=\"log_body\">\n";
5101                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5102                 print "</div>\n";
5103         }
5104         if ($#commitlist >= 100) {
5105                 print "<div class=\"page_nav\">\n";
5106                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5107                                -accesskey => "n", -title => "Alt-n"}, "next");
5108                 print "</div>\n";
5109         }
5110         git_footer_html();
5111 }
5112
5113 sub git_commit {
5114         $hash ||= $hash_base || "HEAD";
5115         my %co = parse_commit($hash)
5116             or die_error(404, "Unknown commit object");
5117         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5118         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5119
5120         my $parent  = $co{'parent'};
5121         my $parents = $co{'parents'}; # listref
5122
5123         # we need to prepare $formats_nav before any parameter munging
5124         my $formats_nav;
5125         if (!defined $parent) {
5126                 # --root commitdiff
5127                 $formats_nav .= '(initial)';
5128         } elsif (@$parents == 1) {
5129                 # single parent commit
5130                 $formats_nav .=
5131                         '(parent: ' .
5132                         $cgi->a({-href => href(action=>"commit",
5133                                                hash=>$parent)},
5134                                 esc_html(substr($parent, 0, 7))) .
5135                         ')';
5136         } else {
5137                 # merge commit
5138                 $formats_nav .=
5139                         '(merge: ' .
5140                         join(' ', map {
5141                                 $cgi->a({-href => href(action=>"commit",
5142                                                        hash=>$_)},
5143                                         esc_html(substr($_, 0, 7)));
5144                         } @$parents ) .
5145                         ')';
5146         }
5147         if (gitweb_check_feature('patches')) {
5148                 $formats_nav .= " | " .
5149                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5150                                 "patch");
5151         }
5152
5153         if (!defined $parent) {
5154                 $parent = "--root";
5155         }
5156         my @difftree;
5157         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5158                 @diff_opts,
5159                 (@$parents <= 1 ? $parent : '-c'),
5160                 $hash, "--"
5161                 or die_error(500, "Open git-diff-tree failed");
5162         @difftree = map { chomp; $_ } <$fd>;
5163         close $fd or die_error(404, "Reading git-diff-tree failed");
5164
5165         # non-textual hash id's can be cached
5166         my $expires;
5167         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5168                 $expires = "+1d";
5169         }
5170         my $refs = git_get_references();
5171         my $ref = format_ref_marker($refs, $co{'id'});
5172
5173         git_header_html(undef, $expires);
5174         git_print_page_nav('commit', '',
5175                            $hash, $co{'tree'}, $hash,
5176                            $formats_nav);
5177
5178         if (defined $co{'parent'}) {
5179                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5180         } else {
5181                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5182         }
5183         print "<div class=\"title_text\">\n" .
5184               "<table class=\"object_header\">\n";
5185         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5186               "<tr>" .
5187               "<td></td><td> $ad{'rfc2822'}";
5188         if ($ad{'hour_local'} < 6) {
5189                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5190                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5191         } else {
5192                 printf(" (%02d:%02d %s)",
5193                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5194         }
5195         print "</td>" .
5196               "</tr>\n";
5197         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5198         print "<tr><td></td><td> $cd{'rfc2822'}" .
5199               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5200               "</td></tr>\n";
5201         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5202         print "<tr>" .
5203               "<td>tree</td>" .
5204               "<td class=\"sha1\">" .
5205               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5206                        class => "list"}, $co{'tree'}) .
5207               "</td>" .
5208               "<td class=\"link\">" .
5209               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5210                       "tree");
5211         my $snapshot_links = format_snapshot_links($hash);
5212         if (defined $snapshot_links) {
5213                 print " | " . $snapshot_links;
5214         }
5215         print "</td>" .
5216               "</tr>\n";
5217
5218         foreach my $par (@$parents) {
5219                 print "<tr>" .
5220                       "<td>parent</td>" .
5221                       "<td class=\"sha1\">" .
5222                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5223                                class => "list"}, $par) .
5224                       "</td>" .
5225                       "<td class=\"link\">" .
5226                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5227                       " | " .
5228                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5229                       "</td>" .
5230                       "</tr>\n";
5231         }
5232         print "</table>".
5233               "</div>\n";
5234
5235         print "<div class=\"page_body\">\n";
5236         git_print_log($co{'comment'});
5237         print "</div>\n";
5238
5239         git_difftree_body(\@difftree, $hash, @$parents);
5240
5241         git_footer_html();
5242 }
5243
5244 sub git_object {
5245         # object is defined by:
5246         # - hash or hash_base alone
5247         # - hash_base and file_name
5248         my $type;
5249
5250         # - hash or hash_base alone
5251         if ($hash || ($hash_base && !defined $file_name)) {
5252                 my $object_id = $hash || $hash_base;
5253
5254                 open my $fd, "-|", quote_command(
5255                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5256                         or die_error(404, "Object does not exist");
5257                 $type = <$fd>;
5258                 chomp $type;
5259                 close $fd
5260                         or die_error(404, "Object does not exist");
5261
5262         # - hash_base and file_name
5263         } elsif ($hash_base && defined $file_name) {
5264                 $file_name =~ s,/+$,,;
5265
5266                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5267                         or die_error(404, "Base object does not exist");
5268
5269                 # here errors should not hapen
5270                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5271                         or die_error(500, "Open git-ls-tree failed");
5272                 my $line = <$fd>;
5273                 close $fd;
5274
5275                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5276                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5277                         die_error(404, "File or directory for given base does not exist");
5278                 }
5279                 $type = $2;
5280                 $hash = $3;
5281         } else {
5282                 die_error(400, "Not enough information to find object");
5283         }
5284
5285         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5286                                           hash=>$hash, hash_base=>$hash_base,
5287                                           file_name=>$file_name),
5288                              -status => '302 Found');
5289 }
5290
5291 sub git_blobdiff {
5292         my $format = shift || 'html';
5293
5294         my $fd;
5295         my @difftree;
5296         my %diffinfo;
5297         my $expires;
5298
5299         # preparing $fd and %diffinfo for git_patchset_body
5300         # new style URI
5301         if (defined $hash_base && defined $hash_parent_base) {
5302                 if (defined $file_name) {
5303                         # read raw output
5304                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5305                                 $hash_parent_base, $hash_base,
5306                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5307                                 or die_error(500, "Open git-diff-tree failed");
5308                         @difftree = map { chomp; $_ } <$fd>;
5309                         close $fd
5310                                 or die_error(404, "Reading git-diff-tree failed");
5311                         @difftree
5312                                 or die_error(404, "Blob diff not found");
5313
5314                 } elsif (defined $hash &&
5315                          $hash =~ /[0-9a-fA-F]{40}/) {
5316                         # try to find filename from $hash
5317
5318                         # read filtered raw output
5319                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5320                                 $hash_parent_base, $hash_base, "--"
5321                                 or die_error(500, "Open git-diff-tree failed");
5322                         @difftree =
5323                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5324                                 # $hash == to_id
5325                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5326                                 map { chomp; $_ } <$fd>;
5327                         close $fd
5328                                 or die_error(404, "Reading git-diff-tree failed");
5329                         @difftree
5330                                 or die_error(404, "Blob diff not found");
5331
5332                 } else {
5333                         die_error(400, "Missing one of the blob diff parameters");
5334                 }
5335
5336                 if (@difftree > 1) {
5337                         die_error(400, "Ambiguous blob diff specification");
5338                 }
5339
5340                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5341                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5342                 $file_name   ||= $diffinfo{'to_file'};
5343
5344                 $hash_parent ||= $diffinfo{'from_id'};
5345                 $hash        ||= $diffinfo{'to_id'};
5346
5347                 # non-textual hash id's can be cached
5348                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5349                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5350                         $expires = '+1d';
5351                 }
5352
5353                 # open patch output
5354                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5355                         '-p', ($format eq 'html' ? "--full-index" : ()),
5356                         $hash_parent_base, $hash_base,
5357                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5358                         or die_error(500, "Open git-diff-tree failed");
5359         }
5360
5361         # old/legacy style URI -- not generated anymore since 1.4.3.
5362         if (!%diffinfo) {
5363                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5364         }
5365
5366         # header
5367         if ($format eq 'html') {
5368                 my $formats_nav =
5369                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5370                                 "raw");
5371                 git_header_html(undef, $expires);
5372                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5373                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5374                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5375                 } else {
5376                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5377                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5378                 }
5379                 if (defined $file_name) {
5380                         git_print_page_path($file_name, "blob", $hash_base);
5381                 } else {
5382                         print "<div class=\"page_path\"></div>\n";
5383                 }
5384
5385         } elsif ($format eq 'plain') {
5386                 print $cgi->header(
5387                         -type => 'text/plain',
5388                         -charset => 'utf-8',
5389                         -expires => $expires,
5390                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5391
5392                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5393
5394         } else {
5395                 die_error(400, "Unknown blobdiff format");
5396         }
5397
5398         # patch
5399         if ($format eq 'html') {
5400                 print "<div class=\"page_body\">\n";
5401
5402                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5403                 close $fd;
5404
5405                 print "</div>\n"; # class="page_body"
5406                 git_footer_html();
5407
5408         } else {
5409                 while (my $line = <$fd>) {
5410                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5411                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5412
5413                         print $line;
5414
5415                         last if $line =~ m!^\+\+\+!;
5416                 }
5417                 local $/ = undef;
5418                 print <$fd>;
5419                 close $fd;
5420         }
5421 }
5422
5423 sub git_blobdiff_plain {
5424         git_blobdiff('plain');
5425 }
5426
5427 sub git_commitdiff {
5428         my %params = @_;
5429         my $format = $params{-format} || 'html';
5430
5431         my ($patch_max) = gitweb_get_feature('patches');
5432         if ($format eq 'patch') {
5433                 die_error(403, "Patch view not allowed") unless $patch_max;
5434         }
5435
5436         $hash ||= $hash_base || "HEAD";
5437         my %co = parse_commit($hash)
5438             or die_error(404, "Unknown commit object");
5439
5440         # choose format for commitdiff for merge
5441         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5442                 $hash_parent = '--cc';
5443         }
5444         # we need to prepare $formats_nav before almost any parameter munging
5445         my $formats_nav;
5446         if ($format eq 'html') {
5447                 $formats_nav =
5448                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5449                                 "raw");
5450                 if ($patch_max) {
5451                         $formats_nav .= " | " .
5452                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5453                                         "patch");
5454                 }
5455
5456                 if (defined $hash_parent &&
5457                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5458                         # commitdiff with two commits given
5459                         my $hash_parent_short = $hash_parent;
5460                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5461                                 $hash_parent_short = substr($hash_parent, 0, 7);
5462                         }
5463                         $formats_nav .=
5464                                 ' (from';
5465                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5466                                 if ($co{'parents'}[$i] eq $hash_parent) {
5467                                         $formats_nav .= ' parent ' . ($i+1);
5468                                         last;
5469                                 }
5470                         }
5471                         $formats_nav .= ': ' .
5472                                 $cgi->a({-href => href(action=>"commitdiff",
5473                                                        hash=>$hash_parent)},
5474                                         esc_html($hash_parent_short)) .
5475                                 ')';
5476                 } elsif (!$co{'parent'}) {
5477                         # --root commitdiff
5478                         $formats_nav .= ' (initial)';
5479                 } elsif (scalar @{$co{'parents'}} == 1) {
5480                         # single parent commit
5481                         $formats_nav .=
5482                                 ' (parent: ' .
5483                                 $cgi->a({-href => href(action=>"commitdiff",
5484                                                        hash=>$co{'parent'})},
5485                                         esc_html(substr($co{'parent'}, 0, 7))) .
5486                                 ')';
5487                 } else {
5488                         # merge commit
5489                         if ($hash_parent eq '--cc') {
5490                                 $formats_nav .= ' | ' .
5491                                         $cgi->a({-href => href(action=>"commitdiff",
5492                                                                hash=>$hash, hash_parent=>'-c')},
5493                                                 'combined');
5494                         } else { # $hash_parent eq '-c'
5495                                 $formats_nav .= ' | ' .
5496                                         $cgi->a({-href => href(action=>"commitdiff",
5497                                                                hash=>$hash, hash_parent=>'--cc')},
5498                                                 'compact');
5499                         }
5500                         $formats_nav .=
5501                                 ' (merge: ' .
5502                                 join(' ', map {
5503                                         $cgi->a({-href => href(action=>"commitdiff",
5504                                                                hash=>$_)},
5505                                                 esc_html(substr($_, 0, 7)));
5506                                 } @{$co{'parents'}} ) .
5507                                 ')';
5508                 }
5509         }
5510
5511         my $hash_parent_param = $hash_parent;
5512         if (!defined $hash_parent_param) {
5513                 # --cc for multiple parents, --root for parentless
5514                 $hash_parent_param =
5515                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5516         }
5517
5518         # read commitdiff
5519         my $fd;
5520         my @difftree;
5521         if ($format eq 'html') {
5522                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5523                         "--no-commit-id", "--patch-with-raw", "--full-index",
5524                         $hash_parent_param, $hash, "--"
5525                         or die_error(500, "Open git-diff-tree failed");
5526
5527                 while (my $line = <$fd>) {
5528                         chomp $line;
5529                         # empty line ends raw part of diff-tree output
5530                         last unless $line;
5531                         push @difftree, scalar parse_difftree_raw_line($line);
5532                 }
5533
5534         } elsif ($format eq 'plain') {
5535                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5536                         '-p', $hash_parent_param, $hash, "--"
5537                         or die_error(500, "Open git-diff-tree failed");
5538         } elsif ($format eq 'patch') {
5539                 # For commit ranges, we limit the output to the number of
5540                 # patches specified in the 'patches' feature.
5541                 # For single commits, we limit the output to a single patch,
5542                 # diverging from the git-format-patch default.
5543                 my @commit_spec = ();
5544                 if ($hash_parent) {
5545                         if ($patch_max > 0) {
5546                                 push @commit_spec, "-$patch_max";
5547                         }
5548                         push @commit_spec, '-n', "$hash_parent..$hash";
5549                 } else {
5550                         if ($params{-single}) {
5551                                 push @commit_spec, '-1';
5552                         } else {
5553                                 if ($patch_max > 0) {
5554                                         push @commit_spec, "-$patch_max";
5555                                 }
5556                                 push @commit_spec, "-n";
5557                         }
5558                         push @commit_spec, '--root', $hash;
5559                 }
5560                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5561                         '--stdout', @commit_spec
5562                         or die_error(500, "Open git-format-patch failed");
5563         } else {
5564                 die_error(400, "Unknown commitdiff format");
5565         }
5566
5567         # non-textual hash id's can be cached
5568         my $expires;
5569         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5570                 $expires = "+1d";
5571         }
5572
5573         # write commit message
5574         if ($format eq 'html') {
5575                 my $refs = git_get_references();
5576                 my $ref = format_ref_marker($refs, $co{'id'});
5577
5578                 git_header_html(undef, $expires);
5579                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5580                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5581                 git_print_authorship(\%co);
5582                 print "<div class=\"page_body\">\n";
5583                 if (@{$co{'comment'}} > 1) {
5584                         print "<div class=\"log\">\n";
5585                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5586                         print "</div>\n"; # class="log"
5587                 }
5588
5589         } elsif ($format eq 'plain') {
5590                 my $refs = git_get_references("tags");
5591                 my $tagname = git_get_rev_name_tags($hash);
5592                 my $filename = basename($project) . "-$hash.patch";
5593
5594                 print $cgi->header(
5595                         -type => 'text/plain',
5596                         -charset => 'utf-8',
5597                         -expires => $expires,
5598                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5599                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5600                 print "From: " . to_utf8($co{'author'}) . "\n";
5601                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5602                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5603
5604                 print "X-Git-Tag: $tagname\n" if $tagname;
5605                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5606
5607                 foreach my $line (@{$co{'comment'}}) {
5608                         print to_utf8($line) . "\n";
5609                 }
5610                 print "---\n\n";
5611         } elsif ($format eq 'patch') {
5612                 my $filename = basename($project) . "-$hash.patch";
5613
5614                 print $cgi->header(
5615                         -type => 'text/plain',
5616                         -charset => 'utf-8',
5617                         -expires => $expires,
5618                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5619         }
5620
5621         # write patch
5622         if ($format eq 'html') {
5623                 my $use_parents = !defined $hash_parent ||
5624                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5625                 git_difftree_body(\@difftree, $hash,
5626                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5627                 print "<br/>\n";
5628
5629                 git_patchset_body($fd, \@difftree, $hash,
5630                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5631                 close $fd;
5632                 print "</div>\n"; # class="page_body"
5633                 git_footer_html();
5634
5635         } elsif ($format eq 'plain') {
5636                 local $/ = undef;
5637                 print <$fd>;
5638                 close $fd
5639                         or print "Reading git-diff-tree failed\n";
5640         } elsif ($format eq 'patch') {
5641                 local $/ = undef;
5642                 print <$fd>;
5643                 close $fd
5644                         or print "Reading git-format-patch failed\n";
5645         }
5646 }
5647
5648 sub git_commitdiff_plain {
5649         git_commitdiff(-format => 'plain');
5650 }
5651
5652 # format-patch-style patches
5653 sub git_patch {
5654         git_commitdiff(-format => 'patch', -single=> 1);
5655 }
5656
5657 sub git_patches {
5658         git_commitdiff(-format => 'patch');
5659 }
5660
5661 sub git_history {
5662         if (!defined $hash_base) {
5663                 $hash_base = git_get_head_hash($project);
5664         }
5665         if (!defined $page) {
5666                 $page = 0;
5667         }
5668         my $ftype;
5669         my %co = parse_commit($hash_base)
5670             or die_error(404, "Unknown commit object");
5671
5672         my $refs = git_get_references();
5673         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5674
5675         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5676                                        $file_name, "--full-history")
5677             or die_error(404, "No such file or directory on given branch");
5678
5679         if (!defined $hash && defined $file_name) {
5680                 # some commits could have deleted file in question,
5681                 # and not have it in tree, but one of them has to have it
5682                 for (my $i = 0; $i <= @commitlist; $i++) {
5683                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5684                         last if defined $hash;
5685                 }
5686         }
5687         if (defined $hash) {
5688                 $ftype = git_get_type($hash);
5689         }
5690         if (!defined $ftype) {
5691                 die_error(500, "Unknown type of object");
5692         }
5693
5694         my $paging_nav = '';
5695         if ($page > 0) {
5696                 $paging_nav .=
5697                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5698                                                file_name=>$file_name)},
5699                                 "first");
5700                 $paging_nav .= " &sdot; " .
5701                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5702                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5703         } else {
5704                 $paging_nav .= "first";
5705                 $paging_nav .= " &sdot; prev";
5706         }
5707         my $next_link = '';
5708         if ($#commitlist >= 100) {
5709                 $next_link =
5710                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5711                                  -accesskey => "n", -title => "Alt-n"}, "next");
5712                 $paging_nav .= " &sdot; $next_link";
5713         } else {
5714                 $paging_nav .= " &sdot; next";
5715         }
5716
5717         git_header_html();
5718         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5719         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5720         git_print_page_path($file_name, $ftype, $hash_base);
5721
5722         git_history_body(\@commitlist, 0, 99,
5723                          $refs, $hash_base, $ftype, $next_link);
5724
5725         git_footer_html();
5726 }
5727
5728 sub git_search {
5729         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5730         if (!defined $searchtext) {
5731                 die_error(400, "Text field is empty");
5732         }
5733         if (!defined $hash) {
5734                 $hash = git_get_head_hash($project);
5735         }
5736         my %co = parse_commit($hash);
5737         if (!%co) {
5738                 die_error(404, "Unknown commit object");
5739         }
5740         if (!defined $page) {
5741                 $page = 0;
5742         }
5743
5744         $searchtype ||= 'commit';
5745         if ($searchtype eq 'pickaxe') {
5746                 # pickaxe may take all resources of your box and run for several minutes
5747                 # with every query - so decide by yourself how public you make this feature
5748                 gitweb_check_feature('pickaxe')
5749                     or die_error(403, "Pickaxe is disabled");
5750         }
5751         if ($searchtype eq 'grep') {
5752                 gitweb_check_feature('grep')
5753                     or die_error(403, "Grep is disabled");
5754         }
5755
5756         git_header_html();
5757
5758         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5759                 my $greptype;
5760                 if ($searchtype eq 'commit') {
5761                         $greptype = "--grep=";
5762                 } elsif ($searchtype eq 'author') {
5763                         $greptype = "--author=";
5764                 } elsif ($searchtype eq 'committer') {
5765                         $greptype = "--committer=";
5766                 }
5767                 $greptype .= $searchtext;
5768                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5769                                                $greptype, '--regexp-ignore-case',
5770                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5771
5772                 my $paging_nav = '';
5773                 if ($page > 0) {
5774                         $paging_nav .=
5775                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5776                                                        searchtext=>$searchtext,
5777                                                        searchtype=>$searchtype)},
5778                                         "first");
5779                         $paging_nav .= " &sdot; " .
5780                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5781                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5782                 } else {
5783                         $paging_nav .= "first";
5784                         $paging_nav .= " &sdot; prev";
5785                 }
5786                 my $next_link = '';
5787                 if ($#commitlist >= 100) {
5788                         $next_link =
5789                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5790                                          -accesskey => "n", -title => "Alt-n"}, "next");
5791                         $paging_nav .= " &sdot; $next_link";
5792                 } else {
5793                         $paging_nav .= " &sdot; next";
5794                 }
5795
5796                 if ($#commitlist >= 100) {
5797                 }
5798
5799                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5800                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5801                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5802         }
5803
5804         if ($searchtype eq 'pickaxe') {
5805                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5806                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5807
5808                 print "<table class=\"pickaxe search\">\n";
5809                 my $alternate = 1;
5810                 $/ = "\n";
5811                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5812                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5813                         ($search_use_regexp ? '--pickaxe-regex' : ());
5814                 undef %co;
5815                 my @files;
5816                 while (my $line = <$fd>) {
5817                         chomp $line;
5818                         next unless $line;
5819
5820                         my %set = parse_difftree_raw_line($line);
5821                         if (defined $set{'commit'}) {
5822                                 # finish previous commit
5823                                 if (%co) {
5824                                         print "</td>\n" .
5825                                               "<td class=\"link\">" .
5826                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5827                                               " | " .
5828                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5829                                         print "</td>\n" .
5830                                               "</tr>\n";
5831                                 }
5832
5833                                 if ($alternate) {
5834                                         print "<tr class=\"dark\">\n";
5835                                 } else {
5836                                         print "<tr class=\"light\">\n";
5837                                 }
5838                                 $alternate ^= 1;
5839                                 %co = parse_commit($set{'commit'});
5840                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5841                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5842                                       "<td><i>$author</i></td>\n" .
5843                                       "<td>" .
5844                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5845                                               -class => "list subject"},
5846                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5847                         } elsif (defined $set{'to_id'}) {
5848                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5849
5850                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5851                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5852                                               -class => "list"},
5853                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5854                                       "<br/>\n";
5855                         }
5856                 }
5857                 close $fd;
5858
5859                 # finish last commit (warning: repetition!)
5860                 if (%co) {
5861                         print "</td>\n" .
5862                               "<td class=\"link\">" .
5863                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5864                               " | " .
5865                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5866                         print "</td>\n" .
5867                               "</tr>\n";
5868                 }
5869
5870                 print "</table>\n";
5871         }
5872
5873         if ($searchtype eq 'grep') {
5874                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5875                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5876
5877                 print "<table class=\"grep_search\">\n";
5878                 my $alternate = 1;
5879                 my $matches = 0;
5880                 $/ = "\n";
5881                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5882                         $search_use_regexp ? ('-E', '-i') : '-F',
5883                         $searchtext, $co{'tree'};
5884                 my $lastfile = '';
5885                 while (my $line = <$fd>) {
5886                         chomp $line;
5887                         my ($file, $lno, $ltext, $binary);
5888                         last if ($matches++ > 1000);
5889                         if ($line =~ /^Binary file (.+) matches$/) {
5890                                 $file = $1;
5891                                 $binary = 1;
5892                         } else {
5893                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5894                         }
5895                         if ($file ne $lastfile) {
5896                                 $lastfile and print "</td></tr>\n";
5897                                 if ($alternate++) {
5898                                         print "<tr class=\"dark\">\n";
5899                                 } else {
5900                                         print "<tr class=\"light\">\n";
5901                                 }
5902                                 print "<td class=\"list\">".
5903                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5904                                                                file_name=>"$file"),
5905                                                 -class => "list"}, esc_path($file));
5906                                 print "</td><td>\n";
5907                                 $lastfile = $file;
5908                         }
5909                         if ($binary) {
5910                                 print "<div class=\"binary\">Binary file</div>\n";
5911                         } else {
5912                                 $ltext = untabify($ltext);
5913                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5914                                         $ltext = esc_html($1, -nbsp=>1);
5915                                         $ltext .= '<span class="match">';
5916                                         $ltext .= esc_html($2, -nbsp=>1);
5917                                         $ltext .= '</span>';
5918                                         $ltext .= esc_html($3, -nbsp=>1);
5919                                 } else {
5920                                         $ltext = esc_html($ltext, -nbsp=>1);
5921                                 }
5922                                 print "<div class=\"pre\">" .
5923                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5924                                                                file_name=>"$file").'#l'.$lno,
5925                                                 -class => "linenr"}, sprintf('%4i', $lno))
5926                                         . ' ' .  $ltext . "</div>\n";
5927                         }
5928                 }
5929                 if ($lastfile) {
5930                         print "</td></tr>\n";
5931                         if ($matches > 1000) {
5932                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5933                         }
5934                 } else {
5935                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5936                 }
5937                 close $fd;
5938
5939                 print "</table>\n";
5940         }
5941         git_footer_html();
5942 }
5943
5944 sub git_search_help {
5945         git_header_html();
5946         git_print_page_nav('','', $hash,$hash,$hash);
5947         print <<EOT;
5948 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5949 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5950 the pattern entered is recognized as the POSIX extended
5951 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5952 insensitive).</p>
5953 <dl>
5954 <dt><b>commit</b></dt>
5955 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5956 EOT
5957         my $have_grep = gitweb_check_feature('grep');
5958         if ($have_grep) {
5959                 print <<EOT;
5960 <dt><b>grep</b></dt>
5961 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5962     a different one) are searched for the given pattern. On large trees, this search can take
5963 a while and put some strain on the server, so please use it with some consideration. Note that
5964 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5965 case-sensitive.</dd>
5966 EOT
5967         }
5968         print <<EOT;
5969 <dt><b>author</b></dt>
5970 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5971 <dt><b>committer</b></dt>
5972 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5973 EOT
5974         my $have_pickaxe = gitweb_check_feature('pickaxe');
5975         if ($have_pickaxe) {
5976                 print <<EOT;
5977 <dt><b>pickaxe</b></dt>
5978 <dd>All commits that caused the string to appear or disappear from any file (changes that
5979 added, removed or "modified" the string) will be listed. This search can take a while and
5980 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5981 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5982 EOT
5983         }
5984         print "</dl>\n";
5985         git_footer_html();
5986 }
5987
5988 sub git_shortlog {
5989         my $head = git_get_head_hash($project);
5990         if (!defined $hash) {
5991                 $hash = $head;
5992         }
5993         if (!defined $page) {
5994                 $page = 0;
5995         }
5996         my $refs = git_get_references();
5997
5998         my $commit_hash = $hash;
5999         if (defined $hash_parent) {
6000                 $commit_hash = "$hash_parent..$hash";
6001         }
6002         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6003
6004         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6005         my $next_link = '';
6006         if ($#commitlist >= 100) {
6007                 $next_link =
6008                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6009                                  -accesskey => "n", -title => "Alt-n"}, "next");
6010         }
6011         my $patch_max = gitweb_check_feature('patches');
6012         if ($patch_max) {
6013                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6014                         $paging_nav .= " &sdot; " .
6015                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6016                                         "patches");
6017                 }
6018         }
6019
6020         git_header_html();
6021         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6022         git_print_header_div('summary', $project);
6023
6024         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6025
6026         git_footer_html();
6027 }
6028
6029 ## ......................................................................
6030 ## feeds (RSS, Atom; OPML)
6031
6032 sub git_feed {
6033         my $format = shift || 'atom';
6034         my $have_blame = gitweb_check_feature('blame');
6035
6036         # Atom: http://www.atomenabled.org/developers/syndication/
6037         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6038         if ($format ne 'rss' && $format ne 'atom') {
6039                 die_error(400, "Unknown web feed format");
6040         }
6041
6042         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6043         my $head = $hash || 'HEAD';
6044         my @commitlist = parse_commits($head, 150, 0, $file_name);
6045
6046         my %latest_commit;
6047         my %latest_date;
6048         my $content_type = "application/$format+xml";
6049         if (defined $cgi->http('HTTP_ACCEPT') &&
6050                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6051                 # browser (feed reader) prefers text/xml
6052                 $content_type = 'text/xml';
6053         }
6054         if (defined($commitlist[0])) {
6055                 %latest_commit = %{$commitlist[0]};
6056                 my $latest_epoch = $latest_commit{'committer_epoch'};
6057                 %latest_date   = parse_date($latest_epoch);
6058                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6059                 if (defined $if_modified) {
6060                         my $since;
6061                         if (eval { require HTTP::Date; 1; }) {
6062                                 $since = HTTP::Date::str2time($if_modified);
6063                         } elsif (eval { require Time::ParseDate; 1; }) {
6064                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6065                         }
6066                         if (defined $since && $latest_epoch <= $since) {
6067                                 print $cgi->header(
6068                                         -type => $content_type,
6069                                         -charset => 'utf-8',
6070                                         -last_modified => $latest_date{'rfc2822'},
6071                                         -status => '304 Not Modified');
6072                                 return;
6073                         }
6074                 }
6075                 print $cgi->header(
6076                         -type => $content_type,
6077                         -charset => 'utf-8',
6078                         -last_modified => $latest_date{'rfc2822'});
6079         } else {
6080                 print $cgi->header(
6081                         -type => $content_type,
6082                         -charset => 'utf-8');
6083         }
6084
6085         # Optimization: skip generating the body if client asks only
6086         # for Last-Modified date.
6087         return if ($cgi->request_method() eq 'HEAD');
6088
6089         # header variables
6090         my $title = "$site_name - $project/$action";
6091         my $feed_type = 'log';
6092         if (defined $hash) {
6093                 $title .= " - '$hash'";
6094                 $feed_type = 'branch log';
6095                 if (defined $file_name) {
6096                         $title .= " :: $file_name";
6097                         $feed_type = 'history';
6098                 }
6099         } elsif (defined $file_name) {
6100                 $title .= " - $file_name";
6101                 $feed_type = 'history';
6102         }
6103         $title .= " $feed_type";
6104         my $descr = git_get_project_description($project);
6105         if (defined $descr) {
6106                 $descr = esc_html($descr);
6107         } else {
6108                 $descr = "$project " .
6109                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6110                          " feed";
6111         }
6112         my $owner = git_get_project_owner($project);
6113         $owner = esc_html($owner);
6114
6115         #header
6116         my $alt_url;
6117         if (defined $file_name) {
6118                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6119         } elsif (defined $hash) {
6120                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6121         } else {
6122                 $alt_url = href(-full=>1, action=>"summary");
6123         }
6124         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6125         if ($format eq 'rss') {
6126                 print <<XML;
6127 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6128 <channel>
6129 XML
6130                 print "<title>$title</title>\n" .
6131                       "<link>$alt_url</link>\n" .
6132                       "<description>$descr</description>\n" .
6133                       "<language>en</language>\n" .
6134                       # project owner is responsible for 'editorial' content
6135                       "<managingEditor>$owner</managingEditor>\n";
6136                 if (defined $logo || defined $favicon) {
6137                         # prefer the logo to the favicon, since RSS
6138                         # doesn't allow both
6139                         my $img = esc_url($logo || $favicon);
6140                         print "<image>\n" .
6141                               "<url>$img</url>\n" .
6142                               "<title>$title</title>\n" .
6143                               "<link>$alt_url</link>\n" .
6144                               "</image>\n";
6145                 }
6146                 if (%latest_date) {
6147                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6148                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6149                 }
6150                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6151         } elsif ($format eq 'atom') {
6152                 print <<XML;
6153 <feed xmlns="http://www.w3.org/2005/Atom">
6154 XML
6155                 print "<title>$title</title>\n" .
6156                       "<subtitle>$descr</subtitle>\n" .
6157                       '<link rel="alternate" type="text/html" href="' .
6158                       $alt_url . '" />' . "\n" .
6159                       '<link rel="self" type="' . $content_type . '" href="' .
6160                       $cgi->self_url() . '" />' . "\n" .
6161                       "<id>" . href(-full=>1) . "</id>\n" .
6162                       # use project owner for feed author
6163                       "<author><name>$owner</name></author>\n";
6164                 if (defined $favicon) {
6165                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6166                 }
6167                 if (defined $logo_url) {
6168                         # not twice as wide as tall: 72 x 27 pixels
6169                         print "<logo>" . esc_url($logo) . "</logo>\n";
6170                 }
6171                 if (! %latest_date) {
6172                         # dummy date to keep the feed valid until commits trickle in:
6173                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6174                 } else {
6175                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6176                 }
6177                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6178         }
6179
6180         # contents
6181         for (my $i = 0; $i <= $#commitlist; $i++) {
6182                 my %co = %{$commitlist[$i]};
6183                 my $commit = $co{'id'};
6184                 # we read 150, we always show 30 and the ones more recent than 48 hours
6185                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6186                         last;
6187                 }
6188                 my %cd = parse_date($co{'author_epoch'});
6189
6190                 # get list of changed files
6191                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6192                         $co{'parent'} || "--root",
6193                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6194                         or next;
6195                 my @difftree = map { chomp; $_ } <$fd>;
6196                 close $fd
6197                         or next;
6198
6199                 # print element (entry, item)
6200                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6201                 if ($format eq 'rss') {
6202                         print "<item>\n" .
6203                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6204                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6205                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6206                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6207                               "<link>$co_url</link>\n" .
6208                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6209                               "<content:encoded>" .
6210                               "<![CDATA[\n";
6211                 } elsif ($format eq 'atom') {
6212                         print "<entry>\n" .
6213                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6214                               "<updated>$cd{'iso-8601'}</updated>\n" .
6215                               "<author>\n" .
6216                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6217                         if ($co{'author_email'}) {
6218                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6219                         }
6220                         print "</author>\n" .
6221                               # use committer for contributor
6222                               "<contributor>\n" .
6223                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6224                         if ($co{'committer_email'}) {
6225                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6226                         }
6227                         print "</contributor>\n" .
6228                               "<published>$cd{'iso-8601'}</published>\n" .
6229                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6230                               "<id>$co_url</id>\n" .
6231                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6232                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6233                 }
6234                 my $comment = $co{'comment'};
6235                 print "<pre>\n";
6236                 foreach my $line (@$comment) {
6237                         $line = esc_html($line);
6238                         print "$line\n";
6239                 }
6240                 print "</pre><ul>\n";
6241                 foreach my $difftree_line (@difftree) {
6242                         my %difftree = parse_difftree_raw_line($difftree_line);
6243                         next if !$difftree{'from_id'};
6244
6245                         my $file = $difftree{'file'} || $difftree{'to_file'};
6246
6247                         print "<li>" .
6248                               "[" .
6249                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6250                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6251                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6252                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6253                                       -title => "diff"}, 'D');
6254                         if ($have_blame) {
6255                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6256                                                              file_name=>$file, hash_base=>$commit),
6257                                               -title => "blame"}, 'B');
6258                         }
6259                         # if this is not a feed of a file history
6260                         if (!defined $file_name || $file_name ne $file) {
6261                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6262                                                              file_name=>$file, hash=>$commit),
6263                                               -title => "history"}, 'H');
6264                         }
6265                         $file = esc_path($file);
6266                         print "] ".
6267                               "$file</li>\n";
6268                 }
6269                 if ($format eq 'rss') {
6270                         print "</ul>]]>\n" .
6271                               "</content:encoded>\n" .
6272                               "</item>\n";
6273                 } elsif ($format eq 'atom') {
6274                         print "</ul>\n</div>\n" .
6275                               "</content>\n" .
6276                               "</entry>\n";
6277                 }
6278         }
6279
6280         # end of feed
6281         if ($format eq 'rss') {
6282                 print "</channel>\n</rss>\n";
6283         }       elsif ($format eq 'atom') {
6284                 print "</feed>\n";
6285         }
6286 }
6287
6288 sub git_rss {
6289         git_feed('rss');
6290 }
6291
6292 sub git_atom {
6293         git_feed('atom');
6294 }
6295
6296 sub git_opml {
6297         my @list = git_get_projects_list();
6298
6299         print $cgi->header(
6300                 -type => 'text/xml',
6301                 -charset => 'utf-8',
6302                 -content_disposition => 'inline; filename="opml.xml"');
6303
6304         print <<XML;
6305 <?xml version="1.0" encoding="utf-8"?>
6306 <opml version="1.0">
6307 <head>
6308   <title>$site_name OPML Export</title>
6309 </head>
6310 <body>
6311 <outline text="git RSS feeds">
6312 XML
6313
6314         foreach my $pr (@list) {
6315                 my %proj = %$pr;
6316                 my $head = git_get_head_hash($proj{'path'});
6317                 if (!defined $head) {
6318                         next;
6319                 }
6320                 $git_dir = "$projectroot/$proj{'path'}";
6321                 my %co = parse_commit($head);
6322                 if (!%co) {
6323                         next;
6324                 }
6325
6326                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6327                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6328                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6329                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6330         }
6331         print <<XML;
6332 </outline>
6333 </body>
6334 </opml>
6335 XML
6336 }