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-scm.com/";
  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         #       'disabled' => boolean (optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'txz' => {
 181                 'display' => 'tar.xz',
 182                 'type' => 'application/x-xz',
 183                 'suffix' => '.tar.xz',
 184                 'format' => 'tar',
 185                 'compressor' => ['xz'],
 186                 'disabled' => 1},
 187
 188         'zip' => {
 189                 'display' => 'zip',
 190                 'type' => 'application/x-zip',
 191                 'suffix' => '.zip',
 192                 'format' => 'zip'},
 193 );
 194
 195 # Aliases so we understand old gitweb.snapshot values in repository
 196 # configuration.
 197 our %known_snapshot_format_aliases = (
 198         'gzip'  => 'tgz',
 199         'bzip2' => 'tbz2',
 200         'xz'    => 'txz',
 201
 202         # backward compatibility: legacy gitweb config support
 203         'x-gzip' => undef, 'gz' => undef,
 204         'x-bzip2' => undef, 'bz2' => undef,
 205         'x-zip' => undef, '' => undef,
 206 );
 207
 208 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 209 # are changed, it may be appropriate to change these values too via
 210 # $GITWEB_CONFIG.
 211 our %avatar_size = (
 212         'default' => 16,
 213         'double'  => 32
 214 );
 215
 216 # You define site-wide feature defaults here; override them with
 217 # $GITWEB_CONFIG as necessary.
 218 our %feature = (
 219         # feature => {
 220         #       'sub' => feature-sub (subroutine),
 221         #       'override' => allow-override (boolean),
 222         #       'default' => [ default options...] (array reference)}
 223         #
 224         # if feature is overridable (it means that allow-override has true value),
 225         # then feature-sub will be called with default options as parameters;
 226         # return value of feature-sub indicates if to enable specified feature
 227         #
 228         # if there is no 'sub' key (no feature-sub), then feature cannot be
 229         # overriden
 230         #
 231         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 232         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 233         # is enabled
 234
 235         # Enable the 'blame' blob view, showing the last commit that modified
 236         # each line in the file. This can be very CPU-intensive.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'blame'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'blame'}{'override'} = 1;
 242         # and in project config gitweb.blame = 0|1;
 243         'blame' => {
 244                 'sub' => sub { feature_bool('blame', @_) },
 245                 'override' => 0,
 246                 'default' => [0]},
 247
 248         # Enable the 'snapshot' link, providing a compressed archive of any
 249         # tree. This can potentially generate high traffic if you have large
 250         # project.
 251
 252         # Value is a list of formats defined in %known_snapshot_formats that
 253         # you wish to offer.
 254         # To disable system wide have in $GITWEB_CONFIG
 255         # $feature{'snapshot'}{'default'} = [];
 256         # To have project specific config enable override in $GITWEB_CONFIG
 257         # $feature{'snapshot'}{'override'} = 1;
 258         # and in project config, a comma-separated list of formats or "none"
 259         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 260         'snapshot' => {
 261                 'sub' => \&feature_snapshot,
 262                 'override' => 0,
 263                 'default' => ['tgz']},
 264
 265         # Enable text search, which will list the commits which match author,
 266         # committer or commit text to a given string.  Enabled by default.
 267         # Project specific override is not supported.
 268         'search' => {
 269                 'override' => 0,
 270                 'default' => [1]},
 271
 272         # Enable grep search, which will list the files in currently selected
 273         # tree containing the given string. Enabled by default. This can be
 274         # potentially CPU-intensive, of course.
 275
 276         # To enable system wide have in $GITWEB_CONFIG
 277         # $feature{'grep'}{'default'} = [1];
 278         # To have project specific config enable override in $GITWEB_CONFIG
 279         # $feature{'grep'}{'override'} = 1;
 280         # and in project config gitweb.grep = 0|1;
 281         'grep' => {
 282                 'sub' => sub { feature_bool('grep', @_) },
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable the pickaxe search, which will list the commits that modified
 287         # a given string in a file. This can be practical and quite faster
 288         # alternative to 'blame', but still potentially CPU-intensive.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pickaxe'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'pickaxe'}{'override'} = 1;
 294         # and in project config gitweb.pickaxe = 0|1;
 295         'pickaxe' => {
 296                 'sub' => sub { feature_bool('pickaxe', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable showing size of blobs in a 'tree' view, in a separate
 301         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 302
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'show-sizes'}{'default'} = [0];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'show-sizes'}{'override'} = 1;
 307         # and in project config gitweb.showsizes = 0|1;
 308         'show-sizes' => {
 309                 'sub' => sub { feature_bool('showsizes', @_) },
 310                 'override' => 0,
 311                 'default' => [1]},
 312
 313         # Make gitweb use an alternative format of the URLs which can be
 314         # more readable and natural-looking: project name is embedded
 315         # directly in the path and the query string contains other
 316         # auxiliary information. All gitweb installations recognize
 317         # URL in either format; this configures in which formats gitweb
 318         # generates links.
 319
 320         # To enable system wide have in $GITWEB_CONFIG
 321         # $feature{'pathinfo'}{'default'} = [1];
 322         # Project specific override is not supported.
 323
 324         # Note that you will need to change the default location of CSS,
 325         # favicon, logo and possibly other files to an absolute URL. Also,
 326         # if gitweb.cgi serves as your indexfile, you will need to force
 327         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 328         'pathinfo' => {
 329                 'override' => 0,
 330                 'default' => [0]},
 331
 332         # Make gitweb consider projects in project root subdirectories
 333         # to be forks of existing projects. Given project $projname.git,
 334         # projects matching $projname/*.git will not be shown in the main
 335         # projects list, instead a '+' mark will be added to $projname
 336         # there and a 'forks' view will be enabled for the project, listing
 337         # all the forks. If project list is taken from a file, forks have
 338         # to be listed after the main project.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'forks'}{'default'} = [1];
 342         # Project specific override is not supported.
 343         'forks' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Insert custom links to the action bar of all project pages.
 348         # This enables you mainly to link to third-party scripts integrating
 349         # into gitweb; e.g. git-browser for graphical history representation
 350         # or custom web-based repository administration interface.
 351
 352         # The 'default' value consists of a list of triplets in the form
 353         # (label, link, position) where position is the label after which
 354         # to insert the link and link is a format string where %n expands
 355         # to the project name, %f to the project path within the filesystem,
 356         # %h to the current hash (h gitweb parameter) and %b to the current
 357         # hash base (hb gitweb parameter); %% expands to %.
 358
 359         # To enable system wide have in $GITWEB_CONFIG e.g.
 360         # $feature{'actions'}{'default'} = [('graphiclog',
 361         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 362         # Project specific override is not supported.
 363         'actions' => {
 364                 'override' => 0,
 365                 'default' => []},
 366
 367         # Allow gitweb scan project content tags described in ctags/
 368         # of project repository, and display the popular Web 2.0-ish
 369         # "tag cloud" near the project list. Note that this is something
 370         # COMPLETELY different from the normal Git tags.
 371
 372         # gitweb by itself can show existing tags, but it does not handle
 373         # tagging itself; you need an external application for that.
 374         # For an example script, check Girocco's cgi/tagproj.cgi.
 375         # You may want to install the HTML::TagCloud Perl module to get
 376         # a pretty tag cloud instead of just a list of tags.
 377
 378         # To enable system wide have in $GITWEB_CONFIG
 379         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 380         # Project specific override is not supported.
 381         'ctags' => {
 382                 'override' => 0,
 383                 'default' => [0]},
 384
 385         # The maximum number of patches in a patchset generated in patch
 386         # view. Set this to 0 or undef to disable patch view, or to a
 387         # negative number to remove any limit.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'patches'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'patches'}{'override'} = 1;
 393         # and in project config gitweb.patches = 0|n;
 394         # where n is the maximum number of patches allowed in a patchset.
 395         'patches' => {
 396                 'sub' => \&feature_patches,
 397                 'override' => 0,
 398                 'default' => [16]},
 399
 400         # Avatar support. When this feature is enabled, views such as
 401         # shortlog or commit will display an avatar associated with
 402         # the email of the committer(s) and/or author(s).
 403
 404         # Currently available providers are gravatar and picon.
 405         # If an unknown provider is specified, the feature is disabled.
 406
 407         # Gravatar depends on Digest::MD5.
 408         # Picon currently relies on the indiana.edu database.
 409
 410         # To enable system wide have in $GITWEB_CONFIG
 411         # $feature{'avatar'}{'default'} = ['<provider>'];
 412         # where <provider> is either gravatar or picon.
 413         # To have project specific config enable override in $GITWEB_CONFIG
 414         # $feature{'avatar'}{'override'} = 1;
 415         # and in project config gitweb.avatar = <provider>;
 416         'avatar' => {
 417                 'sub' => \&feature_avatar,
 418                 'override' => 0,
 419                 'default' => ['']},
 420 );
 421
 422 sub gitweb_get_feature {
 423         my ($name) = @_;
 424         return unless exists $feature{$name};
 425         my ($sub, $override, @defaults) = (
 426                 $feature{$name}{'sub'},
 427                 $feature{$name}{'override'},
 428                 @{$feature{$name}{'default'}});
 429         if (!$override) { return @defaults; }
 430         if (!defined $sub) {
 431                 warn "feature $name is not overridable";
 432                 return @defaults;
 433         }
 434         return $sub->(@defaults);
 435 }
 436
 437 # A wrapper to check if a given feature is enabled.
 438 # With this, you can say
 439 #
 440 #   my $bool_feat = gitweb_check_feature('bool_feat');
 441 #   gitweb_check_feature('bool_feat') or somecode;
 442 #
 443 # instead of
 444 #
 445 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 446 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 447 #
 448 sub gitweb_check_feature {
 449         return (gitweb_get_feature(@_))[0];
 450 }
 451
 452
 453 sub feature_bool {
 454         my $key = shift;
 455         my ($val) = git_get_project_config($key, '--bool');
 456
 457         if (!defined $val) {
 458                 return ($_[0]);
 459         } elsif ($val eq 'true') {
 460                 return (1);
 461         } elsif ($val eq 'false') {
 462                 return (0);
 463         }
 464 }
 465
 466 sub feature_snapshot {
 467         my (@fmts) = @_;
 468
 469         my ($val) = git_get_project_config('snapshot');
 470
 471         if ($val) {
 472                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 473         }
 474
 475         return @fmts;
 476 }
 477
 478 sub feature_patches {
 479         my @val = (git_get_project_config('patches', '--int'));
 480
 481         if (@val) {
 482                 return @val;
 483         }
 484
 485         return ($_[0]);
 486 }
 487
 488 sub feature_avatar {
 489         my @val = (git_get_project_config('avatar'));
 490
 491         return @val ? @val : @_;
 492 }
 493
 494 # checking HEAD file with -e is fragile if the repository was
 495 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 496 # and then pruned.
 497 sub check_head_link {
 498         my ($dir) = @_;
 499         my $headfile = "$dir/HEAD";
 500         return ((-e $headfile) ||
 501                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 502 }
 503
 504 sub check_export_ok {
 505         my ($dir) = @_;
 506         return (check_head_link($dir) &&
 507                 (!$export_ok || -e "$dir/$export_ok") &&
 508                 (!$export_auth_hook || $export_auth_hook->($dir)));
 509 }
 510
 511 # process alternate names for backward compatibility
 512 # filter out unsupported (unknown) snapshot formats
 513 sub filter_snapshot_fmts {
 514         my @fmts = @_;
 515
 516         @fmts = map {
 517                 exists $known_snapshot_format_aliases{$_} ?
 518                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 519         @fmts = grep {
 520                 exists $known_snapshot_formats{$_} &&
 521                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 522 }
 523
 524 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 525 if (-e $GITWEB_CONFIG) {
 526         do $GITWEB_CONFIG;
 527 } else {
 528         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 529         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 530 }
 531
 532 # version of the core git binary
 533 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 534
 535 $projects_list ||= $projectroot;
 536
 537 # ======================================================================
 538 # input validation and dispatch
 539
 540 # input parameters can be collected from a variety of sources (presently, CGI
 541 # and PATH_INFO), so we define an %input_params hash that collects them all
 542 # together during validation: this allows subsequent uses (e.g. href()) to be
 543 # agnostic of the parameter origin
 544
 545 our %input_params = ();
 546
 547 # input parameters are stored with the long parameter name as key. This will
 548 # also be used in the href subroutine to convert parameters to their CGI
 549 # equivalent, and since the href() usage is the most frequent one, we store
 550 # the name -> CGI key mapping here, instead of the reverse.
 551 #
 552 # XXX: Warning: If you touch this, check the search form for updating,
 553 # too.
 554
 555 our @cgi_param_mapping = (
 556         project => "p",
 557         action => "a",
 558         file_name => "f",
 559         file_parent => "fp",
 560         hash => "h",
 561         hash_parent => "hp",
 562         hash_base => "hb",
 563         hash_parent_base => "hpb",
 564         page => "pg",
 565         order => "o",
 566         searchtext => "s",
 567         searchtype => "st",
 568         snapshot_format => "sf",
 569         ctag_filter => 't',
 570         extra_options => "opt",
 571         search_use_regexp => "sr",
 572 );
 573 our %cgi_param_mapping = @cgi_param_mapping;
 574
 575 # we will also need to know the possible actions, for validation
 576 our %actions = (
 577         "blame" => \&git_blame,
 578         "blobdiff" => \&git_blobdiff,
 579         "blobdiff_plain" => \&git_blobdiff_plain,
 580         "blob" => \&git_blob,
 581         "blob_plain" => \&git_blob_plain,
 582         "commitdiff" => \&git_commitdiff,
 583         "commitdiff_plain" => \&git_commitdiff_plain,
 584         "commit" => \&git_commit,
 585         "forks" => \&git_forks,
 586         "heads" => \&git_heads,
 587         "history" => \&git_history,
 588         "log" => \&git_log,
 589         "patch" => \&git_patch,
 590         "patches" => \&git_patches,
 591         "rss" => \&git_rss,
 592         "atom" => \&git_atom,
 593         "search" => \&git_search,
 594         "search_help" => \&git_search_help,
 595         "shortlog" => \&git_shortlog,
 596         "summary" => \&git_summary,
 597         "tag" => \&git_tag,
 598         "tags" => \&git_tags,
 599         "tree" => \&git_tree,
 600         "snapshot" => \&git_snapshot,
 601         "object" => \&git_object,
 602         # those below don't need $project
 603         "opml" => \&git_opml,
 604         "project_list" => \&git_project_list,
 605         "project_index" => \&git_project_index,
 606 );
 607
 608 # finally, we have the hash of allowed extra_options for the commands that
 609 # allow them
 610 our %allowed_options = (
 611         "--no-merges" => [ qw(rss atom log shortlog history) ],
 612 );
 613
 614 # fill %input_params with the CGI parameters. All values except for 'opt'
 615 # should be single values, but opt can be an array. We should probably
 616 # build an array of parameters that can be multi-valued, but since for the time
 617 # being it's only this one, we just single it out
 618 while (my ($name, $symbol) = each %cgi_param_mapping) {
 619         if ($symbol eq 'opt') {
 620                 $input_params{$name} = [ $cgi->param($symbol) ];
 621         } else {
 622                 $input_params{$name} = $cgi->param($symbol);
 623         }
 624 }
 625
 626 # Backwards compatibility - by_tag= <=> t=
 627 if ($cgi->param('by_tag')) {
 628         $input_params{'ctag_filter'} = $cgi->param('by_tag');
 629 }
 630
 631 # now read PATH_INFO and update the parameter list for missing parameters
 632 sub evaluate_path_info {
 633         return if defined $input_params{'project'};
 634         return if !$path_info;
 635         $path_info =~ s,^/+,,;
 636         return if !$path_info;
 637
 638         # find which part of PATH_INFO is project
 639         my $project = $path_info;
 640         $project =~ s,/+$,,;
 641         while ($project && !check_head_link("$projectroot/$project")) {
 642                 $project =~ s,/*[^/]*$,,;
 643         }
 644         return unless $project;
 645         $input_params{'project'} = $project;
 646
 647         # do not change any parameters if an action is given using the query string
 648         return if $input_params{'action'};
 649         $path_info =~ s,^\Q$project\E/*,,;
 650
 651         # next, check if we have an action
 652         my $action = $path_info;
 653         $action =~ s,/.*$,,;
 654         if (exists $actions{$action}) {
 655                 $path_info =~ s,^$action/*,,;
 656                 $input_params{'action'} = $action;
 657         }
 658
 659         # list of actions that want hash_base instead of hash, but can have no
 660         # pathname (f) parameter
 661         my @wants_base = (
 662                 'tree',
 663                 'history',
 664         );
 665
 666         # we want to catch
 667         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 668         my ($parentrefname, $parentpathname, $refname, $pathname) =
 669                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 670
 671         # first, analyze the 'current' part
 672         if (defined $pathname) {
 673                 # we got "branch:filename" or "branch:dir/"
 674                 # we could use git_get_type(branch:pathname), but:
 675                 # - it needs $git_dir
 676                 # - it does a git() call
 677                 # - the convention of terminating directories with a slash
 678                 #   makes it superfluous
 679                 # - embedding the action in the PATH_INFO would make it even
 680                 #   more superfluous
 681                 $pathname =~ s,^/+,,;
 682                 if (!$pathname || substr($pathname, -1) eq "/") {
 683                         $input_params{'action'} ||= "tree";
 684                         $pathname =~ s,/$,,;
 685                 } else {
 686                         # the default action depends on whether we had parent info
 687                         # or not
 688                         if ($parentrefname) {
 689                                 $input_params{'action'} ||= "blobdiff_plain";
 690                         } else {
 691                                 $input_params{'action'} ||= "blob_plain";
 692                         }
 693                 }
 694                 $input_params{'hash_base'} ||= $refname;
 695                 $input_params{'file_name'} ||= $pathname;
 696         } elsif (defined $refname) {
 697                 # we got "branch". In this case we have to choose if we have to
 698                 # set hash or hash_base.
 699                 #
 700                 # Most of the actions without a pathname only want hash to be
 701                 # set, except for the ones specified in @wants_base that want
 702                 # hash_base instead. It should also be noted that hand-crafted
 703                 # links having 'history' as an action and no pathname or hash
 704                 # set will fail, but that happens regardless of PATH_INFO.
 705                 $input_params{'action'} ||= "shortlog";
 706                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 707                         $input_params{'hash_base'} ||= $refname;
 708                 } else {
 709                         $input_params{'hash'} ||= $refname;
 710                 }
 711         }
 712
 713         # next, handle the 'parent' part, if present
 714         if (defined $parentrefname) {
 715                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 716                 # someproject/blobdiff/oldrev..newrev:/filename
 717                 if ($parentpathname) {
 718                         $parentpathname =~ s,^/+,,;
 719                         $parentpathname =~ s,/$,,;
 720                         $input_params{'file_parent'} ||= $parentpathname;
 721                 } else {
 722                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 723                 }
 724                 # we assume that hash_parent_base is wanted if a path was specified,
 725                 # or if the action wants hash_base instead of hash
 726                 if (defined $input_params{'file_parent'} ||
 727                         grep { $_ eq $input_params{'action'} } @wants_base) {
 728                         $input_params{'hash_parent_base'} ||= $parentrefname;
 729                 } else {
 730                         $input_params{'hash_parent'} ||= $parentrefname;
 731                 }
 732         }
 733
 734         # for the snapshot action, we allow URLs in the form
 735         # $project/snapshot/$hash.ext
 736         # where .ext determines the snapshot and gets removed from the
 737         # passed $refname to provide the $hash.
 738         #
 739         # To be able to tell that $refname includes the format extension, we
 740         # require the following two conditions to be satisfied:
 741         # - the hash input parameter MUST have been set from the $refname part
 742         #   of the URL (i.e. they must be equal)
 743         # - the snapshot format MUST NOT have been defined already (e.g. from
 744         #   CGI parameter sf)
 745         # It's also useless to try any matching unless $refname has a dot,
 746         # so we check for that too
 747         if (defined $input_params{'action'} &&
 748                 $input_params{'action'} eq 'snapshot' &&
 749                 defined $refname && index($refname, '.') != -1 &&
 750                 $refname eq $input_params{'hash'} &&
 751                 !defined $input_params{'snapshot_format'}) {
 752                 # We loop over the known snapshot formats, checking for
 753                 # extensions. Allowed extensions are both the defined suffix
 754                 # (which includes the initial dot already) and the snapshot
 755                 # format key itself, with a prepended dot
 756                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 757                         my $hash = $refname;
 758                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 759                                 next;
 760                         }
 761                         my $sfx = $1;
 762                         # a valid suffix was found, so set the snapshot format
 763                         # and reset the hash parameter
 764                         $input_params{'snapshot_format'} = $fmt;
 765                         $input_params{'hash'} = $hash;
 766                         # we also set the format suffix to the one requested
 767                         # in the URL: this way a request for e.g. .tgz returns
 768                         # a .tgz instead of a .tar.gz
 769                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 770                         last;
 771                 }
 772         }
 773 }
 774 evaluate_path_info();
 775
 776 our $action = $input_params{'action'};
 777 if (defined $action) {
 778         if (!validate_action($action)) {
 779                 die_error(400, "Invalid action parameter");
 780         }
 781 }
 782
 783 # parameters which are pathnames
 784 our $project = $input_params{'project'};
 785 if (defined $project) {
 786         if (!validate_project($project)) {
 787                 undef $project;
 788                 die_error(404, "No such project");
 789         }
 790 }
 791
 792 our $file_name = $input_params{'file_name'};
 793 if (defined $file_name) {
 794         if (!validate_pathname($file_name)) {
 795                 die_error(400, "Invalid file parameter");
 796         }
 797 }
 798
 799 our $file_parent = $input_params{'file_parent'};
 800 if (defined $file_parent) {
 801         if (!validate_pathname($file_parent)) {
 802                 die_error(400, "Invalid file parent parameter");
 803         }
 804 }
 805
 806 # parameters which are refnames
 807 our $hash = $input_params{'hash'};
 808 if (defined $hash) {
 809         if (!validate_refname($hash)) {
 810                 die_error(400, "Invalid hash parameter");
 811         }
 812 }
 813
 814 our $hash_parent = $input_params{'hash_parent'};
 815 if (defined $hash_parent) {
 816         if (!validate_refname($hash_parent)) {
 817                 die_error(400, "Invalid hash parent parameter");
 818         }
 819 }
 820
 821 our $hash_base = $input_params{'hash_base'};
 822 if (defined $hash_base) {
 823         if (!validate_refname($hash_base)) {
 824                 die_error(400, "Invalid hash base parameter");
 825         }
 826 }
 827
 828 our @extra_options = @{$input_params{'extra_options'}};
 829 # @extra_options is always defined, since it can only be (currently) set from
 830 # CGI, and $cgi->param() returns the empty array in array context if the param
 831 # is not set
 832 foreach my $opt (@extra_options) {
 833         if (not exists $allowed_options{$opt}) {
 834                 die_error(400, "Invalid option parameter");
 835         }
 836         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 837                 die_error(400, "Invalid option parameter for this action");
 838         }
 839 }
 840
 841 our $hash_parent_base = $input_params{'hash_parent_base'};
 842 if (defined $hash_parent_base) {
 843         if (!validate_refname($hash_parent_base)) {
 844                 die_error(400, "Invalid hash parent base parameter");
 845         }
 846 }
 847
 848 # other parameters
 849 our $page = $input_params{'page'};
 850 if (defined $page) {
 851         if ($page =~ m/[^0-9]/) {
 852                 die_error(400, "Invalid page parameter");
 853         }
 854 }
 855
 856 our $searchtype = $input_params{'searchtype'};
 857 if (defined $searchtype) {
 858         if ($searchtype =~ m/[^a-z]/) {
 859                 die_error(400, "Invalid searchtype parameter");
 860         }
 861 }
 862
 863 our $search_use_regexp = $input_params{'search_use_regexp'};
 864
 865 our $searchtext = $input_params{'searchtext'};
 866 our $search_regexp;
 867 if (defined $searchtext) {
 868         if (length($searchtext) < 2) {
 869                 die_error(403, "At least two characters are required for search parameter");
 870         }
 871         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 872 }
 873
 874 # path to the current git repository
 875 our $git_dir;
 876 $git_dir = "$projectroot/$project" if $project;
 877
 878 # list of supported snapshot formats
 879 our @snapshot_fmts = gitweb_get_feature('snapshot');
 880 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 881
 882 # check that the avatar feature is set to a known provider name,
 883 # and for each provider check if the dependencies are satisfied.
 884 # if the provider name is invalid or the dependencies are not met,
 885 # reset $git_avatar to the empty string.
 886 our ($git_avatar) = gitweb_get_feature('avatar');
 887 if ($git_avatar eq 'gravatar') {
 888         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 889 } elsif ($git_avatar eq 'picon') {
 890         # no dependencies
 891 } else {
 892         $git_avatar = '';
 893 }
 894
 895 # dispatch
 896 if (!defined $action) {
 897         if (defined $hash) {
 898                 $action = git_get_type($hash);
 899         } elsif (defined $hash_base && defined $file_name) {
 900                 $action = git_get_type("$hash_base:$file_name");
 901         } elsif (defined $project) {
 902                 $action = 'summary';
 903         } else {
 904                 $action = 'project_list';
 905         }
 906 }
 907 if (!defined($actions{$action})) {
 908         die_error(400, "Unknown action");
 909 }
 910 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 911     !$project) {
 912         die_error(400, "Project needed");
 913 }
 914 $actions{$action}->();
 915 exit;
 916
 917 ## ======================================================================
 918 ## action links
 919
 920 sub href {
 921         my %params = @_;
 922         # default is to use -absolute url() i.e. $my_uri
 923         my $href = $params{-full} ? $my_url : $my_uri;
 924
 925         $params{'project'} = $project unless exists $params{'project'};
 926
 927         if ($params{-replay}) {
 928                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 929                         if (!exists $params{$name}) {
 930                                 $params{$name} = $input_params{$name};
 931                         }
 932                 }
 933         }
 934
 935         my $use_pathinfo = gitweb_check_feature('pathinfo');
 936         if ($use_pathinfo and defined $params{'project'}) {
 937                 # try to put as many parameters as possible in PATH_INFO:
 938                 #   - project name
 939                 #   - action
 940                 #   - hash_parent or hash_parent_base:/file_parent
 941                 #   - hash or hash_base:/filename
 942                 #   - the snapshot_format as an appropriate suffix
 943
 944                 # When the script is the root DirectoryIndex for the domain,
 945                 # $href here would be something like http://gitweb.example.com/
 946                 # Thus, we strip any trailing / from $href, to spare us double
 947                 # slashes in the final URL
 948                 $href =~ s,/$,,;
 949
 950                 # Then add the project name, if present
 951                 $href .= "/".esc_url($params{'project'});
 952                 delete $params{'project'};
 953
 954                 # since we destructively absorb parameters, we keep this
 955                 # boolean that remembers if we're handling a snapshot
 956                 my $is_snapshot = $params{'action'} eq 'snapshot';
 957
 958                 # Summary just uses the project path URL, any other action is
 959                 # added to the URL
 960                 if (defined $params{'action'}) {
 961                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 962                         delete $params{'action'};
 963                 }
 964
 965                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 966                 # stripping nonexistent or useless pieces
 967                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 968                         || $params{'hash_parent'} || $params{'hash'});
 969                 if (defined $params{'hash_base'}) {
 970                         if (defined $params{'hash_parent_base'}) {
 971                                 $href .= esc_url($params{'hash_parent_base'});
 972                                 # skip the file_parent if it's the same as the file_name
 973                                 if (defined $params{'file_parent'}) {
 974                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 975                                                 delete $params{'file_parent'};
 976                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 977                                                 $href .= ":/".esc_url($params{'file_parent'});
 978                                                 delete $params{'file_parent'};
 979                                         }
 980                                 }
 981                                 $href .= "..";
 982                                 delete $params{'hash_parent'};
 983                                 delete $params{'hash_parent_base'};
 984                         } elsif (defined $params{'hash_parent'}) {
 985                                 $href .= esc_url($params{'hash_parent'}). "..";
 986                                 delete $params{'hash_parent'};
 987                         }
 988
 989                         $href .= esc_url($params{'hash_base'});
 990                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 991                                 $href .= ":/".esc_url($params{'file_name'});
 992                                 delete $params{'file_name'};
 993                         }
 994                         delete $params{'hash'};
 995                         delete $params{'hash_base'};
 996                 } elsif (defined $params{'hash'}) {
 997                         $href .= esc_url($params{'hash'});
 998                         delete $params{'hash'};
 999                 }
1000
1001                 # If the action was a snapshot, we can absorb the
1002                 # snapshot_format parameter too
1003                 if ($is_snapshot) {
1004                         my $fmt = $params{'snapshot_format'};
1005                         # snapshot_format should always be defined when href()
1006                         # is called, but just in case some code forgets, we
1007                         # fall back to the default
1008                         $fmt ||= $snapshot_fmts[0];
1009                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1010                         delete $params{'snapshot_format'};
1011                 }
1012         }
1013
1014         # now encode the parameters explicitly
1015         my @result = ();
1016         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1017                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1018                 if (defined $params{$name}) {
1019                         if (ref($params{$name}) eq "ARRAY") {
1020                                 foreach my $par (@{$params{$name}}) {
1021                                         push @result, $symbol . "=" . esc_param($par);
1022                                 }
1023                         } else {
1024                                 push @result, $symbol . "=" . esc_param($params{$name});
1025                         }
1026                 }
1027         }
1028         $href .= "?" . join(';', @result) if scalar @result;
1029
1030         return $href;
1031 }
1032
1033
1034 ## ======================================================================
1035 ## validation, quoting/unquoting and escaping
1036
1037 sub validate_action {
1038         my $input = shift || return undef;
1039         return undef unless exists $actions{$input};
1040         return $input;
1041 }
1042
1043 sub validate_project {
1044         my $input = shift || return undef;
1045         if (!validate_pathname($input) ||
1046                 !(-d "$projectroot/$input") ||
1047                 !check_export_ok("$projectroot/$input") ||
1048                 ($strict_export && !project_in_list($input))) {
1049                 return undef;
1050         } else {
1051                 return $input;
1052         }
1053 }
1054
1055 sub validate_pathname {
1056         my $input = shift || return undef;
1057
1058         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1059         # at the beginning, at the end, and between slashes.
1060         # also this catches doubled slashes
1061         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1062                 return undef;
1063         }
1064         # no null characters
1065         if ($input =~ m!\0!) {
1066                 return undef;
1067         }
1068         return $input;
1069 }
1070
1071 sub validate_refname {
1072         my $input = shift || return undef;
1073
1074         # textual hashes are O.K.
1075         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1076                 return $input;
1077         }
1078         # it must be correct pathname
1079         $input = validate_pathname($input)
1080                 or return undef;
1081         # restrictions on ref name according to git-check-ref-format
1082         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1083                 return undef;
1084         }
1085         return $input;
1086 }
1087
1088 # decode sequences of octets in utf8 into Perl's internal form,
1089 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1090 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1091 sub to_utf8 {
1092         my $str = shift;
1093         if (utf8::valid($str)) {
1094                 utf8::decode($str);
1095                 return $str;
1096         } else {
1097                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1098         }
1099 }
1100
1101 # quote unsafe chars, but keep the slash, even when it's not
1102 # correct, but quoted slashes look too horrible in bookmarks
1103 sub esc_param {
1104         my $str = shift;
1105         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1106         $str =~ s/ /\+/g;
1107         return $str;
1108 }
1109
1110 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1111 sub esc_url {
1112         my $str = shift;
1113         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1114         $str =~ s/\+/%2B/g;
1115         $str =~ s/ /\+/g;
1116         return $str;
1117 }
1118
1119 # replace invalid utf8 character with SUBSTITUTION sequence
1120 sub esc_html {
1121         my $str = shift;
1122         my %opts = @_;
1123
1124         $str = to_utf8($str);
1125         $str = $cgi->escapeHTML($str);
1126         if ($opts{'-nbsp'}) {
1127                 $str =~ s/ /&nbsp;/g;
1128         }
1129         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1130         return $str;
1131 }
1132
1133 # quote control characters and escape filename to HTML
1134 sub esc_path {
1135         my $str = shift;
1136         my %opts = @_;
1137
1138         $str = to_utf8($str);
1139         $str = $cgi->escapeHTML($str);
1140         if ($opts{'-nbsp'}) {
1141                 $str =~ s/ /&nbsp;/g;
1142         }
1143         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1144         return $str;
1145 }
1146
1147 # Make control characters "printable", using character escape codes (CEC)
1148 sub quot_cec {
1149         my $cntrl = shift;
1150         my %opts = @_;
1151         my %es = ( # character escape codes, aka escape sequences
1152                 "\t" => '\t',   # tab            (HT)
1153                 "\n" => '\n',   # line feed      (LF)
1154                 "\r" => '\r',   # carrige return (CR)
1155                 "\f" => '\f',   # form feed      (FF)
1156                 "\b" => '\b',   # backspace      (BS)
1157                 "\a" => '\a',   # alarm (bell)   (BEL)
1158                 "\e" => '\e',   # escape         (ESC)
1159                 "\013" => '\v', # vertical tab   (VT)
1160                 "\000" => '\0', # nul character  (NUL)
1161         );
1162         my $chr = ( (exists $es{$cntrl})
1163                     ? $es{$cntrl}
1164                     : sprintf('\%2x', ord($cntrl)) );
1165         if ($opts{-nohtml}) {
1166                 return $chr;
1167         } else {
1168                 return "<span class=\"cntrl\">$chr</span>";
1169         }
1170 }
1171
1172 # Alternatively use unicode control pictures codepoints,
1173 # Unicode "printable representation" (PR)
1174 sub quot_upr {
1175         my $cntrl = shift;
1176         my %opts = @_;
1177
1178         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1179         if ($opts{-nohtml}) {
1180                 return $chr;
1181         } else {
1182                 return "<span class=\"cntrl\">$chr</span>";
1183         }
1184 }
1185
1186 # git may return quoted and escaped filenames
1187 sub unquote {
1188         my $str = shift;
1189
1190         sub unq {
1191                 my $seq = shift;
1192                 my %es = ( # character escape codes, aka escape sequences
1193                         't' => "\t",   # tab            (HT, TAB)
1194                         'n' => "\n",   # newline        (NL)
1195                         'r' => "\r",   # return         (CR)
1196                         'f' => "\f",   # form feed      (FF)
1197                         'b' => "\b",   # backspace      (BS)
1198                         'a' => "\a",   # alarm (bell)   (BEL)
1199                         'e' => "\e",   # escape         (ESC)
1200                         'v' => "\013", # vertical tab   (VT)
1201                 );
1202
1203                 if ($seq =~ m/^[0-7]{1,3}$/) {
1204                         # octal char sequence
1205                         return chr(oct($seq));
1206                 } elsif (exists $es{$seq}) {
1207                         # C escape sequence, aka character escape code
1208                         return $es{$seq};
1209                 }
1210                 # quoted ordinary character
1211                 return $seq;
1212         }
1213
1214         if ($str =~ m/^"(.*)"$/) {
1215                 # needs unquoting
1216                 $str = $1;
1217                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1218         }
1219         return $str;
1220 }
1221
1222 # escape tabs (convert tabs to spaces)
1223 sub untabify {
1224         my $line = shift;
1225
1226         while ((my $pos = index($line, "\t")) != -1) {
1227                 if (my $count = (8 - ($pos % 8))) {
1228                         my $spaces = ' ' x $count;
1229                         $line =~ s/\t/$spaces/;
1230                 }
1231         }
1232
1233         return $line;
1234 }
1235
1236 sub project_in_list {
1237         my $project = shift;
1238         my @list = git_get_projects_list();
1239         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1240 }
1241
1242 ## ----------------------------------------------------------------------
1243 ## HTML aware string manipulation
1244
1245 # Try to chop given string on a word boundary between position
1246 # $len and $len+$add_len. If there is no word boundary there,
1247 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1248 # (marking chopped part) would be longer than given string.
1249 sub chop_str {
1250         my $str = shift;
1251         my $len = shift;
1252         my $add_len = shift || 10;
1253         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1254
1255         # Make sure perl knows it is utf8 encoded so we don't
1256         # cut in the middle of a utf8 multibyte char.
1257         $str = to_utf8($str);
1258
1259         # allow only $len chars, but don't cut a word if it would fit in $add_len
1260         # if it doesn't fit, cut it if it's still longer than the dots we would add
1261         # remove chopped character entities entirely
1262
1263         # when chopping in the middle, distribute $len into left and right part
1264         # return early if chopping wouldn't make string shorter
1265         if ($where eq 'center') {
1266                 return $str if ($len + 5 >= length($str)); # filler is length 5
1267                 $len = int($len/2);
1268         } else {
1269                 return $str if ($len + 4 >= length($str)); # filler is length 4
1270         }
1271
1272         # regexps: ending and beginning with word part up to $add_len
1273         my $endre = qr/.{$len}\w{0,$add_len}/;
1274         my $begre = qr/\w{0,$add_len}.{$len}/;
1275
1276         if ($where eq 'left') {
1277                 $str =~ m/^(.*?)($begre)$/;
1278                 my ($lead, $body) = ($1, $2);
1279                 if (length($lead) > 4) {
1280                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1281                         $lead = " ...";
1282                 }
1283                 return "$lead$body";
1284
1285         } elsif ($where eq 'center') {
1286                 $str =~ m/^($endre)(.*)$/;
1287                 my ($left, $str)  = ($1, $2);
1288                 $str =~ m/^(.*?)($begre)$/;
1289                 my ($mid, $right) = ($1, $2);
1290                 if (length($mid) > 5) {
1291                         $left  =~ s/&[^;]*$//;
1292                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1293                         $mid = " ... ";
1294                 }
1295                 return "$left$mid$right";
1296
1297         } else {
1298                 $str =~ m/^($endre)(.*)$/;
1299                 my $body = $1;
1300                 my $tail = $2;
1301                 if (length($tail) > 4) {
1302                         $body =~ s/&[^;]*$//;
1303                         $tail = "... ";
1304                 }
1305                 return "$body$tail";
1306         }
1307 }
1308
1309 # takes the same arguments as chop_str, but also wraps a <span> around the
1310 # result with a title attribute if it does get chopped. Additionally, the
1311 # string is HTML-escaped.
1312 sub chop_and_escape_str {
1313         my ($str) = @_;
1314
1315         my $chopped = chop_str(@_);
1316         if ($chopped eq $str) {
1317                 return esc_html($chopped);
1318         } else {
1319                 $str =~ s/[[:cntrl:]]/?/g;
1320                 return $cgi->span({-title=>$str}, esc_html($chopped));
1321         }
1322 }
1323
1324 ## ----------------------------------------------------------------------
1325 ## functions returning short strings
1326
1327 # CSS class for given age value (in seconds)
1328 sub age_class {
1329         my $age = shift;
1330
1331         if (!defined $age) {
1332                 return "noage";
1333         } elsif ($age < 60*60*2) {
1334                 return "age0";
1335         } elsif ($age < 60*60*24*2) {
1336                 return "age1";
1337         } else {
1338                 return "age2";
1339         }
1340 }
1341
1342 # convert age in seconds to "nn units ago" string
1343 sub age_string {
1344         my $age = shift;
1345         my $age_str;
1346
1347         if ($age > 60*60*24*365*2) {
1348                 $age_str = (int $age/60/60/24/365);
1349                 $age_str .= " years ago";
1350         } elsif ($age > 60*60*24*(365/12)*2) {
1351                 $age_str = int $age/60/60/24/(365/12);
1352                 $age_str .= " months ago";
1353         } elsif ($age > 60*60*24*7*2) {
1354                 $age_str = int $age/60/60/24/7;
1355                 $age_str .= " weeks ago";
1356         } elsif ($age > 60*60*24*2) {
1357                 $age_str = int $age/60/60/24;
1358                 $age_str .= " days ago";
1359         } elsif ($age > 60*60*2) {
1360                 $age_str = int $age/60/60;
1361                 $age_str .= " hours ago";
1362         } elsif ($age > 60*2) {
1363                 $age_str = int $age/60;
1364                 $age_str .= " min ago";
1365         } elsif ($age > 2) {
1366                 $age_str = int $age;
1367                 $age_str .= " sec ago";
1368         } else {
1369                 $age_str .= " right now";
1370         }
1371         return $age_str;
1372 }
1373
1374 use constant {
1375         S_IFINVALID => 0030000,
1376         S_IFGITLINK => 0160000,
1377 };
1378
1379 # submodule/subproject, a commit object reference
1380 sub S_ISGITLINK {
1381         my $mode = shift;
1382
1383         return (($mode & S_IFMT) == S_IFGITLINK)
1384 }
1385
1386 # convert file mode in octal to symbolic file mode string
1387 sub mode_str {
1388         my $mode = oct shift;
1389
1390         if (S_ISGITLINK($mode)) {
1391                 return 'm---------';
1392         } elsif (S_ISDIR($mode & S_IFMT)) {
1393                 return 'drwxr-xr-x';
1394         } elsif (S_ISLNK($mode)) {
1395                 return 'lrwxrwxrwx';
1396         } elsif (S_ISREG($mode)) {
1397                 # git cares only about the executable bit
1398                 if ($mode & S_IXUSR) {
1399                         return '-rwxr-xr-x';
1400                 } else {
1401                         return '-rw-r--r--';
1402                 };
1403         } else {
1404                 return '----------';
1405         }
1406 }
1407
1408 # convert file mode in octal to file type string
1409 sub file_type {
1410         my $mode = shift;
1411
1412         if ($mode !~ m/^[0-7]+$/) {
1413                 return $mode;
1414         } else {
1415                 $mode = oct $mode;
1416         }
1417
1418         if (S_ISGITLINK($mode)) {
1419                 return "submodule";
1420         } elsif (S_ISDIR($mode & S_IFMT)) {
1421                 return "directory";
1422         } elsif (S_ISLNK($mode)) {
1423                 return "symlink";
1424         } elsif (S_ISREG($mode)) {
1425                 return "file";
1426         } else {
1427                 return "unknown";
1428         }
1429 }
1430
1431 # convert file mode in octal to file type description string
1432 sub file_type_long {
1433         my $mode = shift;
1434
1435         if ($mode !~ m/^[0-7]+$/) {
1436                 return $mode;
1437         } else {
1438                 $mode = oct $mode;
1439         }
1440
1441         if (S_ISGITLINK($mode)) {
1442                 return "submodule";
1443         } elsif (S_ISDIR($mode & S_IFMT)) {
1444                 return "directory";
1445         } elsif (S_ISLNK($mode)) {
1446                 return "symlink";
1447         } elsif (S_ISREG($mode)) {
1448                 if ($mode & S_IXUSR) {
1449                         return "executable";
1450                 } else {
1451                         return "file";
1452                 };
1453         } else {
1454                 return "unknown";
1455         }
1456 }
1457
1458
1459 ## ----------------------------------------------------------------------
1460 ## functions returning short HTML fragments, or transforming HTML fragments
1461 ## which don't belong to other sections
1462
1463 # format line of commit message.
1464 sub format_log_line_html {
1465         my $line = shift;
1466
1467         $line = esc_html($line, -nbsp=>1);
1468         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1469                 $cgi->a({-href => href(action=>"object", hash=>$1),
1470                                         -class => "text"}, $1);
1471         }eg;
1472
1473         return $line;
1474 }
1475
1476 # format marker of refs pointing to given object
1477
1478 # the destination action is chosen based on object type and current context:
1479 # - for annotated tags, we choose the tag view unless it's the current view
1480 #   already, in which case we go to shortlog view
1481 # - for other refs, we keep the current view if we're in history, shortlog or
1482 #   log view, and select shortlog otherwise
1483 sub format_ref_marker {
1484         my ($refs, $id) = @_;
1485         my $markers = '';
1486
1487         if (defined $refs->{$id}) {
1488                 foreach my $ref (@{$refs->{$id}}) {
1489                         # this code exploits the fact that non-lightweight tags are the
1490                         # only indirect objects, and that they are the only objects for which
1491                         # we want to use tag instead of shortlog as action
1492                         my ($type, $name) = qw();
1493                         my $indirect = ($ref =~ s/\^\{\}$//);
1494                         # e.g. tags/v2.6.11 or heads/next
1495                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1496                                 $type = $1;
1497                                 $name = $2;
1498                         } else {
1499                                 $type = "ref";
1500                                 $name = $ref;
1501                         }
1502
1503                         my $class = $type;
1504                         $class .= " indirect" if $indirect;
1505
1506                         my $dest_action = "shortlog";
1507
1508                         if ($indirect) {
1509                                 $dest_action = "tag" unless $action eq "tag";
1510                         } elsif ($action =~ /^(history|(short)?log)$/) {
1511                                 $dest_action = $action;
1512                         }
1513
1514                         my $dest = "";
1515                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1516                         $dest .= $ref;
1517
1518                         my $link = $cgi->a({
1519                                 -href => href(
1520                                         action=>$dest_action,
1521                                         hash=>$dest
1522                                 )}, $name);
1523
1524                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1525                                 $link . "</span>";
1526                 }
1527         }
1528
1529         if ($markers) {
1530                 return ' <span class="refs">'. $markers . '</span>';
1531         } else {
1532                 return "";
1533         }
1534 }
1535
1536 # format, perhaps shortened and with markers, title line
1537 sub format_subject_html {
1538         my ($long, $short, $href, $extra) = @_;
1539         $extra = '' unless defined($extra);
1540
1541         if (length($short) < length($long)) {
1542                 $long =~ s/[[:cntrl:]]/?/g;
1543                 return $cgi->a({-href => $href, -class => "list subject",
1544                                 -title => to_utf8($long)},
1545                        esc_html($short)) . $extra;
1546         } else {
1547                 return $cgi->a({-href => $href, -class => "list subject"},
1548                        esc_html($long)) . $extra;
1549         }
1550 }
1551
1552 # Rather than recomputing the url for an email multiple times, we cache it
1553 # after the first hit. This gives a visible benefit in views where the avatar
1554 # for the same email is used repeatedly (e.g. shortlog).
1555 # The cache is shared by all avatar engines (currently gravatar only), which
1556 # are free to use it as preferred. Since only one avatar engine is used for any
1557 # given page, there's no risk for cache conflicts.
1558 our %avatar_cache = ();
1559
1560 # Compute the picon url for a given email, by using the picon search service over at
1561 # http://www.cs.indiana.edu/picons/search.html
1562 sub picon_url {
1563         my $email = lc shift;
1564         if (!$avatar_cache{$email}) {
1565                 my ($user, $domain) = split('@', $email);
1566                 $avatar_cache{$email} =
1567                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1568                         "$domain/$user/" .
1569                         "users+domains+unknown/up/single";
1570         }
1571         return $avatar_cache{$email};
1572 }
1573
1574 # Compute the gravatar url for a given email, if it's not in the cache already.
1575 # Gravatar stores only the part of the URL before the size, since that's the
1576 # one computationally more expensive. This also allows reuse of the cache for
1577 # different sizes (for this particular engine).
1578 sub gravatar_url {
1579         my $email = lc shift;
1580         my $size = shift;
1581         $avatar_cache{$email} ||=
1582                 "http://www.gravatar.com/avatar/" .
1583                         Digest::MD5::md5_hex($email) . "?s=";
1584         return $avatar_cache{$email} . $size;
1585 }
1586
1587 # Insert an avatar for the given $email at the given $size if the feature
1588 # is enabled.
1589 sub git_get_avatar {
1590         my ($email, %opts) = @_;
1591         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1592         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1593         $opts{-size} ||= 'default';
1594         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1595         my $url = "";
1596         if ($git_avatar eq 'gravatar') {
1597                 $url = gravatar_url($email, $size);
1598         } elsif ($git_avatar eq 'picon') {
1599                 $url = picon_url($email);
1600         }
1601         # Other providers can be added by extending the if chain, defining $url
1602         # as needed. If no variant puts something in $url, we assume avatars
1603         # are completely disabled/unavailable.
1604         if ($url) {
1605                 return $pre_white .
1606                        "<img width=\"$size\" " .
1607                             "class=\"avatar\" " .
1608                             "src=\"$url\" " .
1609                             "alt=\"\" " .
1610                        "/>" . $post_white;
1611         } else {
1612                 return "";
1613         }
1614 }
1615
1616 sub format_search_author {
1617         my ($author, $searchtype, $displaytext) = @_;
1618         my $have_search = gitweb_check_feature('search');
1619
1620         if ($have_search) {
1621                 my $performed = "";
1622                 if ($searchtype eq 'author') {
1623                         $performed = "authored";
1624                 } elsif ($searchtype eq 'committer') {
1625                         $performed = "committed";
1626                 }
1627
1628                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1629                                 searchtext=>$author,
1630                                 searchtype=>$searchtype), class=>"list",
1631                                 title=>"Search for commits $performed by $author"},
1632                                 $displaytext);
1633
1634         } else {
1635                 return $displaytext;
1636         }
1637 }
1638
1639 # format the author name of the given commit with the given tag
1640 # the author name is chopped and escaped according to the other
1641 # optional parameters (see chop_str).
1642 sub format_author_html {
1643         my $tag = shift;
1644         my $co = shift;
1645         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1646         return "<$tag class=\"author\">" .
1647                format_search_author($co->{'author_name'}, "author",
1648                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1649                        $author) .
1650                "</$tag>";
1651 }
1652
1653 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1654 sub format_git_diff_header_line {
1655         my $line = shift;
1656         my $diffinfo = shift;
1657         my ($from, $to) = @_;
1658
1659         if ($diffinfo->{'nparents'}) {
1660                 # combined diff
1661                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1662                 if ($to->{'href'}) {
1663                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1664                                          esc_path($to->{'file'}));
1665                 } else { # file was deleted (no href)
1666                         $line .= esc_path($to->{'file'});
1667                 }
1668         } else {
1669                 # "ordinary" diff
1670                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1671                 if ($from->{'href'}) {
1672                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1673                                          'a/' . esc_path($from->{'file'}));
1674                 } else { # file was added (no href)
1675                         $line .= 'a/' . esc_path($from->{'file'});
1676                 }
1677                 $line .= ' ';
1678                 if ($to->{'href'}) {
1679                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1680                                          'b/' . esc_path($to->{'file'}));
1681                 } else { # file was deleted
1682                         $line .= 'b/' . esc_path($to->{'file'});
1683                 }
1684         }
1685
1686         return "<div class=\"diff header\">$line</div>\n";
1687 }
1688
1689 # format extended diff header line, before patch itself
1690 sub format_extended_diff_header_line {
1691         my $line = shift;
1692         my $diffinfo = shift;
1693         my ($from, $to) = @_;
1694
1695         # match <path>
1696         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1697                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1698                                        esc_path($from->{'file'}));
1699         }
1700         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1701                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1702                                  esc_path($to->{'file'}));
1703         }
1704         # match single <mode>
1705         if ($line =~ m/\s(\d{6})$/) {
1706                 $line .= '<span class="info"> (' .
1707                          file_type_long($1) .
1708                          ')</span>';
1709         }
1710         # match <hash>
1711         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1712                 # can match only for combined diff
1713                 $line = 'index ';
1714                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1715                         if ($from->{'href'}[$i]) {
1716                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1717                                                   -class=>"hash"},
1718                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1719                         } else {
1720                                 $line .= '0' x 7;
1721                         }
1722                         # separator
1723                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1724                 }
1725                 $line .= '..';
1726                 if ($to->{'href'}) {
1727                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1728                                          substr($diffinfo->{'to_id'},0,7));
1729                 } else {
1730                         $line .= '0' x 7;
1731                 }
1732
1733         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1734                 # can match only for ordinary diff
1735                 my ($from_link, $to_link);
1736                 if ($from->{'href'}) {
1737                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1738                                              substr($diffinfo->{'from_id'},0,7));
1739                 } else {
1740                         $from_link = '0' x 7;
1741                 }
1742                 if ($to->{'href'}) {
1743                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1744                                            substr($diffinfo->{'to_id'},0,7));
1745                 } else {
1746                         $to_link = '0' x 7;
1747                 }
1748                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1749                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1750         }
1751
1752         return $line . "<br/>\n";
1753 }
1754
1755 # format from-file/to-file diff header
1756 sub format_diff_from_to_header {
1757         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1758         my $line;
1759         my $result = '';
1760
1761         $line = $from_line;
1762         #assert($line =~ m/^---/) if DEBUG;
1763         # no extra formatting for "^--- /dev/null"
1764         if (! $diffinfo->{'nparents'}) {
1765                 # ordinary (single parent) diff
1766                 if ($line =~ m!^--- "?a/!) {
1767                         if ($from->{'href'}) {
1768                                 $line = '--- a/' .
1769                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1770                                                 esc_path($from->{'file'}));
1771                         } else {
1772                                 $line = '--- a/' .
1773                                         esc_path($from->{'file'});
1774                         }
1775                 }
1776                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1777
1778         } else {
1779                 # combined diff (merge commit)
1780                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1781                         if ($from->{'href'}[$i]) {
1782                                 $line = '--- ' .
1783                                         $cgi->a({-href=>href(action=>"blobdiff",
1784                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1785                                                              hash_parent_base=>$parents[$i],
1786                                                              file_parent=>$from->{'file'}[$i],
1787                                                              hash=>$diffinfo->{'to_id'},
1788                                                              hash_base=>$hash,
1789                                                              file_name=>$to->{'file'}),
1790                                                  -class=>"path",
1791                                                  -title=>"diff" . ($i+1)},
1792                                                 $i+1) .
1793                                         '/' .
1794                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1795                                                 esc_path($from->{'file'}[$i]));
1796                         } else {
1797                                 $line = '--- /dev/null';
1798                         }
1799                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1800                 }
1801         }
1802
1803         $line = $to_line;
1804         #assert($line =~ m/^\+\+\+/) if DEBUG;
1805         # no extra formatting for "^+++ /dev/null"
1806         if ($line =~ m!^\+\+\+ "?b/!) {
1807                 if ($to->{'href'}) {
1808                         $line = '+++ b/' .
1809                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1810                                         esc_path($to->{'file'}));
1811                 } else {
1812                         $line = '+++ b/' .
1813                                 esc_path($to->{'file'});
1814                 }
1815         }
1816         $result .= qq!<div class="diff to_file">$line</div>\n!;
1817
1818         return $result;
1819 }
1820
1821 # create note for patch simplified by combined diff
1822 sub format_diff_cc_simplified {
1823         my ($diffinfo, @parents) = @_;
1824         my $result = '';
1825
1826         $result .= "<div class=\"diff header\">" .
1827                    "diff --cc ";
1828         if (!is_deleted($diffinfo)) {
1829                 $result .= $cgi->a({-href => href(action=>"blob",
1830                                                   hash_base=>$hash,
1831                                                   hash=>$diffinfo->{'to_id'},
1832                                                   file_name=>$diffinfo->{'to_file'}),
1833                                     -class => "path"},
1834                                    esc_path($diffinfo->{'to_file'}));
1835         } else {
1836                 $result .= esc_path($diffinfo->{'to_file'});
1837         }
1838         $result .= "</div>\n" . # class="diff header"
1839                    "<div class=\"diff nodifferences\">" .
1840                    "Simple merge" .
1841                    "</div>\n"; # class="diff nodifferences"
1842
1843         return $result;
1844 }
1845
1846 # format patch (diff) line (not to be used for diff headers)
1847 sub format_diff_line {
1848         my $line = shift;
1849         my ($from, $to) = @_;
1850         my $diff_class = "";
1851
1852         chomp $line;
1853
1854         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1855                 # combined diff
1856                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1857                 if ($line =~ m/^\@{3}/) {
1858                         $diff_class = " chunk_header";
1859                 } elsif ($line =~ m/^\\/) {
1860                         $diff_class = " incomplete";
1861                 } elsif ($prefix =~ tr/+/+/) {
1862                         $diff_class = " add";
1863                 } elsif ($prefix =~ tr/-/-/) {
1864                         $diff_class = " rem";
1865                 }
1866         } else {
1867                 # assume ordinary diff
1868                 my $char = substr($line, 0, 1);
1869                 if ($char eq '+') {
1870                         $diff_class = " add";
1871                 } elsif ($char eq '-') {
1872                         $diff_class = " rem";
1873                 } elsif ($char eq '@') {
1874                         $diff_class = " chunk_header";
1875                 } elsif ($char eq "\\") {
1876                         $diff_class = " incomplete";
1877                 }
1878         }
1879         $line = untabify($line);
1880         if ($from && $to && $line =~ m/^\@{2} /) {
1881                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1882                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1883
1884                 $from_lines = 0 unless defined $from_lines;
1885                 $to_lines   = 0 unless defined $to_lines;
1886
1887                 if ($from->{'href'}) {
1888                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1889                                              -class=>"list"}, $from_text);
1890                 }
1891                 if ($to->{'href'}) {
1892                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1893                                              -class=>"list"}, $to_text);
1894                 }
1895                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1896                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1897                 return "<div class=\"diff$diff_class\">$line</div>\n";
1898         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1899                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1900                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1901
1902                 @from_text = split(' ', $ranges);
1903                 for (my $i = 0; $i < @from_text; ++$i) {
1904                         ($from_start[$i], $from_nlines[$i]) =
1905                                 (split(',', substr($from_text[$i], 1)), 0);
1906                 }
1907
1908                 $to_text   = pop @from_text;
1909                 $to_start  = pop @from_start;
1910                 $to_nlines = pop @from_nlines;
1911
1912                 $line = "<span class=\"chunk_info\">$prefix ";
1913                 for (my $i = 0; $i < @from_text; ++$i) {
1914                         if ($from->{'href'}[$i]) {
1915                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1916                                                   -class=>"list"}, $from_text[$i]);
1917                         } else {
1918                                 $line .= $from_text[$i];
1919                         }
1920                         $line .= " ";
1921                 }
1922                 if ($to->{'href'}) {
1923                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1924                                           -class=>"list"}, $to_text);
1925                 } else {
1926                         $line .= $to_text;
1927                 }
1928                 $line .= " $prefix</span>" .
1929                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1930                 return "<div class=\"diff$diff_class\">$line</div>\n";
1931         }
1932         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1933 }
1934
1935 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1936 # linked.  Pass the hash of the tree/commit to snapshot.
1937 sub format_snapshot_links {
1938         my ($hash) = @_;
1939         my $num_fmts = @snapshot_fmts;
1940         if ($num_fmts > 1) {
1941                 # A parenthesized list of links bearing format names.
1942                 # e.g. "snapshot (_tar.gz_ _zip_)"
1943                 return "snapshot (" . join(' ', map
1944                         $cgi->a({
1945                                 -href => href(
1946                                         action=>"snapshot",
1947                                         hash=>$hash,
1948                                         snapshot_format=>$_
1949                                 )
1950                         }, $known_snapshot_formats{$_}{'display'})
1951                 , @snapshot_fmts) . ")";
1952         } elsif ($num_fmts == 1) {
1953                 # A single "snapshot" link whose tooltip bears the format name.
1954                 # i.e. "_snapshot_"
1955                 my ($fmt) = @snapshot_fmts;
1956                 return
1957                         $cgi->a({
1958                                 -href => href(
1959                                         action=>"snapshot",
1960                                         hash=>$hash,
1961                                         snapshot_format=>$fmt
1962                                 ),
1963                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1964                         }, "snapshot");
1965         } else { # $num_fmts == 0
1966                 return undef;
1967         }
1968 }
1969
1970 ## ......................................................................
1971 ## functions returning values to be passed, perhaps after some
1972 ## transformation, to other functions; e.g. returning arguments to href()
1973
1974 # returns hash to be passed to href to generate gitweb URL
1975 # in -title key it returns description of link
1976 sub get_feed_info {
1977         my $format = shift || 'Atom';
1978         my %res = (action => lc($format));
1979
1980         # feed links are possible only for project views
1981         return unless (defined $project);
1982         # some views should link to OPML, or to generic project feed,
1983         # or don't have specific feed yet (so they should use generic)
1984         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1985
1986         my $branch;
1987         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1988         # from tag links; this also makes possible to detect branch links
1989         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1990             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1991                 $branch = $1;
1992         }
1993         # find log type for feed description (title)
1994         my $type = 'log';
1995         if (defined $file_name) {
1996                 $type  = "history of $file_name";
1997                 $type .= "/" if ($action eq 'tree');
1998                 $type .= " on '$branch'" if (defined $branch);
1999         } else {
2000                 $type = "log of $branch" if (defined $branch);
2001         }
2002
2003         $res{-title} = $type;
2004         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2005         $res{'file_name'} = $file_name;
2006
2007         return %res;
2008 }
2009
2010 ## ----------------------------------------------------------------------
2011 ## git utility subroutines, invoking git commands
2012
2013 # returns path to the core git executable and the --git-dir parameter as list
2014 sub git_cmd {
2015         return $GIT, '--git-dir='.$git_dir;
2016 }
2017
2018 # quote the given arguments for passing them to the shell
2019 # quote_command("command", "arg 1", "arg with ' and ! characters")
2020 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2021 # Try to avoid using this function wherever possible.
2022 sub quote_command {
2023         return join(' ',
2024                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2025 }
2026
2027 # get HEAD ref of given project as hash
2028 sub git_get_head_hash {
2029         my $project = shift;
2030         my $o_git_dir = $git_dir;
2031         my $retval = undef;
2032         $git_dir = "$projectroot/$project";
2033         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2034                 my $head = <$fd>;
2035                 close $fd;
2036                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2037                         $retval = $1;
2038                 }
2039         }
2040         if (defined $o_git_dir) {
2041                 $git_dir = $o_git_dir;
2042         }
2043         return $retval;
2044 }
2045
2046 # get type of given object
2047 sub git_get_type {
2048         my $hash = shift;
2049
2050         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2051         my $type = <$fd>;
2052         close $fd or return;
2053         chomp $type;
2054         return $type;
2055 }
2056
2057 # repository configuration
2058 our $config_file = '';
2059 our %config;
2060
2061 # store multiple values for single key as anonymous array reference
2062 # single values stored directly in the hash, not as [ <value> ]
2063 sub hash_set_multi {
2064         my ($hash, $key, $value) = @_;
2065
2066         if (!exists $hash->{$key}) {
2067                 $hash->{$key} = $value;
2068         } elsif (!ref $hash->{$key}) {
2069                 $hash->{$key} = [ $hash->{$key}, $value ];
2070         } else {
2071                 push @{$hash->{$key}}, $value;
2072         }
2073 }
2074
2075 # return hash of git project configuration
2076 # optionally limited to some section, e.g. 'gitweb'
2077 sub git_parse_project_config {
2078         my $section_regexp = shift;
2079         my %config;
2080
2081         local $/ = "\0";
2082
2083         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2084                 or return;
2085
2086         while (my $keyval = <$fh>) {
2087                 chomp $keyval;
2088                 my ($key, $value) = split(/\n/, $keyval, 2);
2089
2090                 hash_set_multi(\%config, $key, $value)
2091                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2092         }
2093         close $fh;
2094
2095         return %config;
2096 }
2097
2098 # convert config value to boolean: 'true' or 'false'
2099 # no value, number > 0, 'true' and 'yes' values are true
2100 # rest of values are treated as false (never as error)
2101 sub config_to_bool {
2102         my $val = shift;
2103
2104         return 1 if !defined $val;             # section.key
2105
2106         # strip leading and trailing whitespace
2107         $val =~ s/^\s+//;
2108         $val =~ s/\s+$//;
2109
2110         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2111                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2112 }
2113
2114 # convert config value to simple decimal number
2115 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2116 # to be multiplied by 1024, 1048576, or 1073741824
2117 sub config_to_int {
2118         my $val = shift;
2119
2120         # strip leading and trailing whitespace
2121         $val =~ s/^\s+//;
2122         $val =~ s/\s+$//;
2123
2124         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2125                 $unit = lc($unit);
2126                 # unknown unit is treated as 1
2127                 return $num * ($unit eq 'g' ? 1073741824 :
2128                                $unit eq 'm' ?    1048576 :
2129                                $unit eq 'k' ?       1024 : 1);
2130         }
2131         return $val;
2132 }
2133
2134 # convert config value to array reference, if needed
2135 sub config_to_multi {
2136         my $val = shift;
2137
2138         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2139 }
2140
2141 sub git_get_project_config {
2142         my ($key, $type) = @_;
2143
2144         # key sanity check
2145         return unless ($key);
2146         $key =~ s/^gitweb\.//;
2147         return if ($key =~ m/\W/);
2148
2149         # type sanity check
2150         if (defined $type) {
2151                 $type =~ s/^--//;
2152                 $type = undef
2153                         unless ($type eq 'bool' || $type eq 'int');
2154         }
2155
2156         # get config
2157         if (!defined $config_file ||
2158             $config_file ne "$git_dir/config") {
2159                 %config = git_parse_project_config('gitweb');
2160                 $config_file = "$git_dir/config";
2161         }
2162
2163         # check if config variable (key) exists
2164         return unless exists $config{"gitweb.$key"};
2165
2166         # ensure given type
2167         if (!defined $type) {
2168                 return $config{"gitweb.$key"};
2169         } elsif ($type eq 'bool') {
2170                 # backward compatibility: 'git config --bool' returns true/false
2171                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2172         } elsif ($type eq 'int') {
2173                 return config_to_int($config{"gitweb.$key"});
2174         }
2175         return $config{"gitweb.$key"};
2176 }
2177
2178 # get hash of given path at given ref
2179 sub git_get_hash_by_path {
2180         my $base = shift;
2181         my $path = shift || return undef;
2182         my $type = shift;
2183
2184         $path =~ s,/+$,,;
2185
2186         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2187                 or die_error(500, "Open git-ls-tree failed");
2188         my $line = <$fd>;
2189         close $fd or return undef;
2190
2191         if (!defined $line) {
2192                 # there is no tree or hash given by $path at $base
2193                 return undef;
2194         }
2195
2196         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2197         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2198         if (defined $type && $type ne $2) {
2199                 # type doesn't match
2200                 return undef;
2201         }
2202         return $3;
2203 }
2204
2205 # get path of entry with given hash at given tree-ish (ref)
2206 # used to get 'from' filename for combined diff (merge commit) for renames
2207 sub git_get_path_by_hash {
2208         my $base = shift || return;
2209         my $hash = shift || return;
2210
2211         local $/ = "\0";
2212
2213         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2214                 or return undef;
2215         while (my $line = <$fd>) {
2216                 chomp $line;
2217
2218                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2219                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2220                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2221                         close $fd;
2222                         return $1;
2223                 }
2224         }
2225         close $fd;
2226         return undef;
2227 }
2228
2229 ## ......................................................................
2230 ## git utility functions, directly accessing git repository
2231
2232 sub git_get_project_description {
2233         my $path = shift;
2234
2235         $git_dir = "$projectroot/$path";
2236         open my $fd, '<', "$git_dir/description"
2237                 or return git_get_project_config('description');
2238         my $descr = <$fd>;
2239         close $fd;
2240         if (defined $descr) {
2241                 chomp $descr;
2242         }
2243         return $descr;
2244 }
2245
2246 sub git_get_project_ctags {
2247         my $path = shift;
2248         my $ctags = {};
2249
2250         $git_dir = "$projectroot/$path";
2251         opendir my $dh, "$git_dir/ctags"
2252                 or return $ctags;
2253         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2254                 open my $ct, '<', $_ or next;
2255                 my $val = <$ct>;
2256                 chomp $val;
2257                 close $ct;
2258                 my $ctag = $_; $ctag =~ s#.*/##;
2259                 $ctags->{$ctag} = $val;
2260         }
2261         closedir $dh;
2262         $ctags;
2263 }
2264
2265 sub git_populate_project_tagcloud {
2266         my ($ctags, $action) = @_;
2267
2268         # First, merge different-cased tags; tags vote on casing
2269         my %ctags_lc;
2270         foreach (keys %$ctags) {
2271                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2272                 if (not $ctags_lc{lc $_}->{topcount}
2273                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2274                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2275                         $ctags_lc{lc $_}->{topname} = $_;
2276                 }
2277         }
2278
2279         my $cloud;
2280         if (eval { require HTML::TagCloud; 1; }) {
2281                 $cloud = HTML::TagCloud->new;
2282                 foreach (sort keys %ctags_lc) {
2283                         # Pad the title with spaces so that the cloud looks
2284                         # less crammed.
2285                         my $title = $ctags_lc{$_}->{topname};
2286                         $title =~ s/ /&nbsp;/g;
2287                         $title =~ s/^/&nbsp;/g;
2288                         $title =~ s/$/&nbsp;/g;
2289                         $cloud->add($title, href(action=>$action, ctag_filter=>$_),
2290                                     $ctags_lc{$_}->{count});
2291                 }
2292         } else {
2293                 $cloud = \%ctags_lc;
2294         }
2295         $cloud;
2296 }
2297
2298 sub git_show_project_tagcloud {
2299         my ($cloud, $count, $action) = @_;
2300         print STDERR ref($cloud)."..\n";
2301         if (ref $cloud eq 'HTML::TagCloud') {
2302                 return $cloud->html_and_css($count);
2303         } else {
2304                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2305                 return '<p align="center">' . join (', ', map {
2306                         $cgi->a({-href => href(action=>$action, ctag_filter=>$_)},
2307                                 $cloud->{$_}->{topname});
2308                 } splice(@tags, 0, $count)) . '</p>';
2309         }
2310 }
2311
2312 sub git_get_project_url_list {
2313         my $path = shift;
2314
2315         $git_dir = "$projectroot/$path";
2316         open my $fd, '<', "$git_dir/cloneurl"
2317                 or return wantarray ?
2318                 @{ config_to_multi(git_get_project_config('url')) } :
2319                    config_to_multi(git_get_project_config('url'));
2320         my @git_project_url_list = map { chomp; $_ } <$fd>;
2321         close $fd;
2322
2323         return wantarray ? @git_project_url_list : \@git_project_url_list;
2324 }
2325
2326 sub git_get_projects_list {
2327         my ($filter) = @_;
2328         my @list;
2329
2330         $filter ||= '';
2331         $filter =~ s/\.git$//;
2332
2333         my $check_forks = gitweb_check_feature('forks');
2334
2335         if (-d $projects_list) {
2336                 # search in directory
2337                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2338                 # remove the trailing "/"
2339                 $dir =~ s!/+$!!;
2340                 my $pfxlen = length("$dir");
2341                 my $pfxdepth = ($dir =~ tr!/!!);
2342
2343                 File::Find::find({
2344                         follow_fast => 1, # follow symbolic links
2345                         follow_skip => 2, # ignore duplicates
2346                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2347                         wanted => sub {
2348                                 # skip project-list toplevel, if we get it.
2349                                 return if (m!^[/.]$!);
2350                                 # only directories can be git repositories
2351                                 return unless (-d $_);
2352                                 # don't traverse too deep (Find is super slow on os x)
2353                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2354                                         $File::Find::prune = 1;
2355                                         return;
2356                                 }
2357
2358                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2359                                 # we check related file in $projectroot
2360                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2361                                 if (check_export_ok("$projectroot/$path")) {
2362                                         push @list, { path => $path };
2363                                         $File::Find::prune = 1;
2364                                 }
2365                         },
2366                 }, "$dir");
2367
2368         } elsif (-f $projects_list) {
2369                 # read from file(url-encoded):
2370                 # 'git%2Fgit.git Linus+Torvalds'
2371                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2372                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2373                 my %paths;
2374                 open my $fd, '<', $projects_list or return;
2375         PROJECT:
2376                 while (my $line = <$fd>) {
2377                         chomp $line;
2378                         my ($path, $owner) = split ' ', $line;
2379                         $path = unescape($path);
2380                         $owner = unescape($owner);
2381                         if (!defined $path) {
2382                                 next;
2383                         }
2384                         if ($filter ne '') {
2385                                 # looking for forks;
2386                                 my $pfx = substr($path, 0, length($filter));
2387                                 if ($pfx ne $filter) {
2388                                         next PROJECT;
2389                                 }
2390                                 my $sfx = substr($path, length($filter));
2391                                 if ($sfx !~ /^\/.*\.git$/) {
2392                                         next PROJECT;
2393                                 }
2394                         } elsif ($check_forks) {
2395                         PATH:
2396                                 foreach my $filter (keys %paths) {
2397                                         # looking for forks;
2398                                         my $pfx = substr($path, 0, length($filter));
2399                                         if ($pfx ne $filter) {
2400                                                 next PATH;
2401                                         }
2402                                         my $sfx = substr($path, length($filter));
2403                                         if ($sfx !~ /^\/.*\.git$/) {
2404                                                 next PATH;
2405                                         }
2406                                         # is a fork, don't include it in
2407                                         # the list
2408                                         next PROJECT;
2409                                 }
2410                         }
2411                         if (check_export_ok("$projectroot/$path")) {
2412                                 my $pr = {
2413                                         path => $path,
2414                                         owner => to_utf8($owner),
2415                                 };
2416                                 push @list, $pr;
2417                                 (my $forks_path = $path) =~ s/\.git$//;
2418                                 $paths{$forks_path}++;
2419                         }
2420                 }
2421                 close $fd;
2422         }
2423         return @list;
2424 }
2425
2426 our $gitweb_project_owner = undef;
2427 sub git_get_project_list_from_file {
2428
2429         return if (defined $gitweb_project_owner);
2430
2431         $gitweb_project_owner = {};
2432         # read from file (url-encoded):
2433         # 'git%2Fgit.git Linus+Torvalds'
2434         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2435         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2436         if (-f $projects_list) {
2437                 open(my $fd, '<', $projects_list);
2438                 while (my $line = <$fd>) {
2439                         chomp $line;
2440                         my ($pr, $ow) = split ' ', $line;
2441                         $pr = unescape($pr);
2442                         $ow = unescape($ow);
2443                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2444                 }
2445                 close $fd;
2446         }
2447 }
2448
2449 sub git_get_project_owner {
2450         my $project = shift;
2451         my $owner;
2452
2453         return undef unless $project;
2454         $git_dir = "$projectroot/$project";
2455
2456         if (!defined $gitweb_project_owner) {
2457                 git_get_project_list_from_file();
2458         }
2459
2460         if (exists $gitweb_project_owner->{$project}) {
2461                 $owner = $gitweb_project_owner->{$project};
2462         }
2463         if (!defined $owner){
2464                 $owner = git_get_project_config('owner');
2465         }
2466         if (!defined $owner) {
2467                 $owner = get_file_owner("$git_dir");
2468         }
2469
2470         return $owner;
2471 }
2472
2473 sub git_get_last_activity {
2474         my ($path) = @_;
2475         my $fd;
2476
2477         $git_dir = "$projectroot/$path";
2478         open($fd, "-|", git_cmd(), 'for-each-ref',
2479              '--format=%(committer)',
2480              '--sort=-committerdate',
2481              '--count=1',
2482              'refs/heads') or return;
2483         my $most_recent = <$fd>;
2484         close $fd or return;
2485         if (defined $most_recent &&
2486             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2487                 my $timestamp = $1;
2488                 my $age = time - $timestamp;
2489                 return ($age, age_string($age));
2490         }
2491         return (undef, undef);
2492 }
2493
2494 sub git_get_references {
2495         my $type = shift || "";
2496         my %refs;
2497         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2498         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2499         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2500                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2501                 or return;
2502
2503         while (my $line = <$fd>) {
2504                 chomp $line;
2505                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2506                         if (defined $refs{$1}) {
2507                                 push @{$refs{$1}}, $2;
2508                         } else {
2509                                 $refs{$1} = [ $2 ];
2510                         }
2511                 }
2512         }
2513         close $fd or return;
2514         return \%refs;
2515 }
2516
2517 sub git_get_rev_name_tags {
2518         my $hash = shift || return undef;
2519
2520         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2521                 or return;
2522         my $name_rev = <$fd>;
2523         close $fd;
2524
2525         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2526                 return $1;
2527         } else {
2528                 # catches also '$hash undefined' output
2529                 return undef;
2530         }
2531 }
2532
2533 ## ----------------------------------------------------------------------
2534 ## parse to hash functions
2535
2536 sub parse_date {
2537         my $epoch = shift;
2538         my $tz = shift || "-0000";
2539
2540         my %date;
2541         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2542         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2543         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2544         $date{'hour'} = $hour;
2545         $date{'minute'} = $min;
2546         $date{'mday'} = $mday;
2547         $date{'day'} = $days[$wday];
2548         $date{'month'} = $months[$mon];
2549         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2550                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2551         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2552                              $mday, $months[$mon], $hour ,$min;
2553         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2554                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2555
2556         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2557         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2558         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2559         $date{'hour_local'} = $hour;
2560         $date{'minute_local'} = $min;
2561         $date{'tz_local'} = $tz;
2562         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2563                                   1900+$year, $mon+1, $mday,
2564                                   $hour, $min, $sec, $tz);
2565         return %date;
2566 }
2567
2568 sub parse_tag {
2569         my $tag_id = shift;
2570         my %tag;
2571         my @comment;
2572
2573         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2574         $tag{'id'} = $tag_id;
2575         while (my $line = <$fd>) {
2576                 chomp $line;
2577                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2578                         $tag{'object'} = $1;
2579                 } elsif ($line =~ m/^type (.+)$/) {
2580                         $tag{'type'} = $1;
2581                 } elsif ($line =~ m/^tag (.+)$/) {
2582                         $tag{'name'} = $1;
2583                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2584                         $tag{'author'} = $1;
2585                         $tag{'author_epoch'} = $2;
2586                         $tag{'author_tz'} = $3;
2587                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2588                                 $tag{'author_name'}  = $1;
2589                                 $tag{'author_email'} = $2;
2590                         } else {
2591                                 $tag{'author_name'} = $tag{'author'};
2592                         }
2593                 } elsif ($line =~ m/--BEGIN/) {
2594                         push @comment, $line;
2595                         last;
2596                 } elsif ($line eq "") {
2597                         last;
2598                 }
2599         }
2600         push @comment, <$fd>;
2601         $tag{'comment'} = \@comment;
2602         close $fd or return;
2603         if (!defined $tag{'name'}) {
2604                 return
2605         };
2606         return %tag
2607 }
2608
2609 sub parse_commit_text {
2610         my ($commit_text, $withparents) = @_;
2611         my @commit_lines = split '\n', $commit_text;
2612         my %co;
2613
2614         pop @commit_lines; # Remove '\0'
2615
2616         if (! @commit_lines) {
2617                 return;
2618         }
2619
2620         my $header = shift @commit_lines;
2621         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2622                 return;
2623         }
2624         ($co{'id'}, my @parents) = split ' ', $header;
2625         while (my $line = shift @commit_lines) {
2626                 last if $line eq "\n";
2627                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2628                         $co{'tree'} = $1;
2629                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2630                         push @parents, $1;
2631                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2632                         $co{'author'} = to_utf8($1);
2633                         $co{'author_epoch'} = $2;
2634                         $co{'author_tz'} = $3;
2635                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2636                                 $co{'author_name'}  = $1;
2637                                 $co{'author_email'} = $2;
2638                         } else {
2639                                 $co{'author_name'} = $co{'author'};
2640                         }
2641                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2642                         $co{'committer'} = to_utf8($1);
2643                         $co{'committer_epoch'} = $2;
2644                         $co{'committer_tz'} = $3;
2645                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2646                                 $co{'committer_name'}  = $1;
2647                                 $co{'committer_email'} = $2;
2648                         } else {
2649                                 $co{'committer_name'} = $co{'committer'};
2650                         }
2651                 }
2652         }
2653         if (!defined $co{'tree'}) {
2654                 return;
2655         };
2656         $co{'parents'} = \@parents;
2657         $co{'parent'} = $parents[0];
2658
2659         foreach my $title (@commit_lines) {
2660                 $title =~ s/^    //;
2661                 if ($title ne "") {
2662                         $co{'title'} = chop_str($title, 80, 5);
2663                         # remove leading stuff of merges to make the interesting part visible
2664                         if (length($title) > 50) {
2665                                 $title =~ s/^Automatic //;
2666                                 $title =~ s/^merge (of|with) /Merge ... /i;
2667                                 if (length($title) > 50) {
2668                                         $title =~ s/(http|rsync):\/\///;
2669                                 }
2670                                 if (length($title) > 50) {
2671                                         $title =~ s/(master|www|rsync)\.//;
2672                                 }
2673                                 if (length($title) > 50) {
2674                                         $title =~ s/kernel.org:?//;
2675                                 }
2676                                 if (length($title) > 50) {
2677                                         $title =~ s/\/pub\/scm//;
2678                                 }
2679                         }
2680                         $co{'title_short'} = chop_str($title, 50, 5);
2681                         last;
2682                 }
2683         }
2684         if (! defined $co{'title'} || $co{'title'} eq "") {
2685                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2686         }
2687         # remove added spaces
2688         foreach my $line (@commit_lines) {
2689                 $line =~ s/^    //;
2690         }
2691         $co{'comment'} = \@commit_lines;
2692
2693         my $age = time - $co{'committer_epoch'};
2694         $co{'age'} = $age;
2695         $co{'age_string'} = age_string($age);
2696         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2697         if ($age > 60*60*24*7*2) {
2698                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2699                 $co{'age_string_age'} = $co{'age_string'};
2700         } else {
2701                 $co{'age_string_date'} = $co{'age_string'};
2702                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2703         }
2704         return %co;
2705 }
2706
2707 sub parse_commit {
2708         my ($commit_id) = @_;
2709         my %co;
2710
2711         local $/ = "\0";
2712
2713         open my $fd, "-|", git_cmd(), "rev-list",
2714                 "--parents",
2715                 "--header",
2716                 "--max-count=1",
2717                 $commit_id,
2718                 "--",
2719                 or die_error(500, "Open git-rev-list failed");
2720         %co = parse_commit_text(<$fd>, 1);
2721         close $fd;
2722
2723         return %co;
2724 }
2725
2726 sub parse_commits {
2727         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2728         my @cos;
2729
2730         $maxcount ||= 1;
2731         $skip ||= 0;
2732
2733         local $/ = "\0";
2734
2735         open my $fd, "-|", git_cmd(), "rev-list",
2736                 "--header",
2737                 @args,
2738                 ("--max-count=" . $maxcount),
2739                 ("--skip=" . $skip),
2740                 @extra_options,
2741                 $commit_id,
2742                 "--",
2743                 ($filename ? ($filename) : ())
2744                 or die_error(500, "Open git-rev-list failed");
2745         while (my $line = <$fd>) {
2746                 my %co = parse_commit_text($line);
2747                 push @cos, \%co;
2748         }
2749         close $fd;
2750
2751         return wantarray ? @cos : \@cos;
2752 }
2753
2754 # parse line of git-diff-tree "raw" output
2755 sub parse_difftree_raw_line {
2756         my $line = shift;
2757         my %res;
2758
2759         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2760         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2761         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2762                 $res{'from_mode'} = $1;
2763                 $res{'to_mode'} = $2;
2764                 $res{'from_id'} = $3;
2765                 $res{'to_id'} = $4;
2766                 $res{'status'} = $5;
2767                 $res{'similarity'} = $6;
2768                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2769                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2770                 } else {
2771                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2772                 }
2773         }
2774         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2775         # combined diff (for merge commit)
2776         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2777                 $res{'nparents'}  = length($1);
2778                 $res{'from_mode'} = [ split(' ', $2) ];
2779                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2780                 $res{'from_id'} = [ split(' ', $3) ];
2781                 $res{'to_id'} = pop @{$res{'from_id'}};
2782                 $res{'status'} = [ split('', $4) ];
2783                 $res{'to_file'} = unquote($5);
2784         }
2785         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2786         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2787                 $res{'commit'} = $1;
2788         }
2789
2790         return wantarray ? %res : \%res;
2791 }
2792
2793 # wrapper: return parsed line of git-diff-tree "raw" output
2794 # (the argument might be raw line, or parsed info)
2795 sub parsed_difftree_line {
2796         my $line_or_ref = shift;
2797
2798         if (ref($line_or_ref) eq "HASH") {
2799                 # pre-parsed (or generated by hand)
2800                 return $line_or_ref;
2801         } else {
2802                 return parse_difftree_raw_line($line_or_ref);
2803         }
2804 }
2805
2806 # parse line of git-ls-tree output
2807 sub parse_ls_tree_line {
2808         my $line = shift;
2809         my %opts = @_;
2810         my %res;
2811
2812         if ($opts{'-l'}) {
2813                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2814                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2815
2816                 $res{'mode'} = $1;
2817                 $res{'type'} = $2;
2818                 $res{'hash'} = $3;
2819                 $res{'size'} = $4;
2820                 if ($opts{'-z'}) {
2821                         $res{'name'} = $5;
2822                 } else {
2823                         $res{'name'} = unquote($5);
2824                 }
2825         } else {
2826                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2827                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2828
2829                 $res{'mode'} = $1;
2830                 $res{'type'} = $2;
2831                 $res{'hash'} = $3;
2832                 if ($opts{'-z'}) {
2833                         $res{'name'} = $4;
2834                 } else {
2835                         $res{'name'} = unquote($4);
2836                 }
2837         }
2838
2839         return wantarray ? %res : \%res;
2840 }
2841
2842 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2843 sub parse_from_to_diffinfo {
2844         my ($diffinfo, $from, $to, @parents) = @_;
2845
2846         if ($diffinfo->{'nparents'}) {
2847                 # combined diff
2848                 $from->{'file'} = [];
2849                 $from->{'href'} = [];
2850                 fill_from_file_info($diffinfo, @parents)
2851                         unless exists $diffinfo->{'from_file'};
2852                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2853                         $from->{'file'}[$i] =
2854                                 defined $diffinfo->{'from_file'}[$i] ?
2855                                         $diffinfo->{'from_file'}[$i] :
2856                                         $diffinfo->{'to_file'};
2857                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2858                                 $from->{'href'}[$i] = href(action=>"blob",
2859                                                            hash_base=>$parents[$i],
2860                                                            hash=>$diffinfo->{'from_id'}[$i],
2861                                                            file_name=>$from->{'file'}[$i]);
2862                         } else {
2863                                 $from->{'href'}[$i] = undef;
2864                         }
2865                 }
2866         } else {
2867                 # ordinary (not combined) diff
2868                 $from->{'file'} = $diffinfo->{'from_file'};
2869                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2870                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2871                                                hash=>$diffinfo->{'from_id'},
2872                                                file_name=>$from->{'file'});
2873                 } else {
2874                         delete $from->{'href'};
2875                 }
2876         }
2877
2878         $to->{'file'} = $diffinfo->{'to_file'};
2879         if (!is_deleted($diffinfo)) { # file exists in result
2880                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2881                                      hash=>$diffinfo->{'to_id'},
2882                                      file_name=>$to->{'file'});
2883         } else {
2884                 delete $to->{'href'};
2885         }
2886 }
2887
2888 ## ......................................................................
2889 ## parse to array of hashes functions
2890
2891 sub git_get_heads_list {
2892         my $limit = shift;
2893         my @headslist;
2894
2895         open my $fd, '-|', git_cmd(), 'for-each-ref',
2896                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2897                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2898                 'refs/heads'
2899                 or return;
2900         while (my $line = <$fd>) {
2901                 my %ref_item;
2902
2903                 chomp $line;
2904                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2905                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2906                 my ($committer, $epoch, $tz) =
2907                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2908                 $ref_item{'fullname'}  = $name;
2909                 $name =~ s!^refs/heads/!!;
2910
2911                 $ref_item{'name'}  = $name;
2912                 $ref_item{'id'}    = $hash;
2913                 $ref_item{'title'} = $title || '(no commit message)';
2914                 $ref_item{'epoch'} = $epoch;
2915                 if ($epoch) {
2916                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2917                 } else {
2918                         $ref_item{'age'} = "unknown";
2919                 }
2920
2921                 push @headslist, \%ref_item;
2922         }
2923         close $fd;
2924
2925         return wantarray ? @headslist : \@headslist;
2926 }
2927
2928 sub git_get_tags_list {
2929         my $limit = shift;
2930         my @tagslist;
2931
2932         open my $fd, '-|', git_cmd(), 'for-each-ref',
2933                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2934                 '--format=%(objectname) %(objecttype) %(refname) '.
2935                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2936                 'refs/tags'
2937                 or return;
2938         while (my $line = <$fd>) {
2939                 my %ref_item;
2940
2941                 chomp $line;
2942                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2943                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2944                 my ($creator, $epoch, $tz) =
2945                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2946                 $ref_item{'fullname'} = $name;
2947                 $name =~ s!^refs/tags/!!;
2948
2949                 $ref_item{'type'} = $type;
2950                 $ref_item{'id'} = $id;
2951                 $ref_item{'name'} = $name;
2952                 if ($type eq "tag") {
2953                         $ref_item{'subject'} = $title;
2954                         $ref_item{'reftype'} = $reftype;
2955                         $ref_item{'refid'}   = $refid;
2956                 } else {
2957                         $ref_item{'reftype'} = $type;
2958                         $ref_item{'refid'}   = $id;
2959                 }
2960
2961                 if ($type eq "tag" || $type eq "commit") {
2962                         $ref_item{'epoch'} = $epoch;
2963                         if ($epoch) {
2964                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2965                         } else {
2966                                 $ref_item{'age'} = "unknown";
2967                         }
2968                 }
2969
2970                 push @tagslist, \%ref_item;
2971         }
2972         close $fd;
2973
2974         return wantarray ? @tagslist : \@tagslist;
2975 }
2976
2977 ## ----------------------------------------------------------------------
2978 ## filesystem-related functions
2979
2980 sub get_file_owner {
2981         my $path = shift;
2982
2983         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2984         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2985         if (!defined $gcos) {
2986                 return undef;
2987         }
2988         my $owner = $gcos;
2989         $owner =~ s/[,;].*$//;
2990         return to_utf8($owner);
2991 }
2992
2993 # assume that file exists
2994 sub insert_file {
2995         my $filename = shift;
2996
2997         open my $fd, '<', $filename;
2998         print map { to_utf8($_) } <$fd>;
2999         close $fd;
3000 }
3001
3002 ## ......................................................................
3003 ## mimetype related functions
3004
3005 sub mimetype_guess_file {
3006         my $filename = shift;
3007         my $mimemap = shift;
3008         -r $mimemap or return undef;
3009
3010         my %mimemap;
3011         open(my $mh, '<', $mimemap) or return undef;
3012         while (<$mh>) {
3013                 next if m/^#/; # skip comments
3014                 my ($mimetype, $exts) = split(/\t+/);
3015                 if (defined $exts) {
3016                         my @exts = split(/\s+/, $exts);
3017                         foreach my $ext (@exts) {
3018                                 $mimemap{$ext} = $mimetype;
3019                         }
3020                 }
3021         }
3022         close($mh);
3023
3024         $filename =~ /\.([^.]*)$/;
3025         return $mimemap{$1};
3026 }
3027
3028 sub mimetype_guess {
3029         my $filename = shift;
3030         my $mime;
3031         $filename =~ /\./ or return undef;
3032
3033         if ($mimetypes_file) {
3034                 my $file = $mimetypes_file;
3035                 if ($file !~ m!^/!) { # if it is relative path
3036                         # it is relative to project
3037                         $file = "$projectroot/$project/$file";
3038                 }
3039                 $mime = mimetype_guess_file($filename, $file);
3040         }
3041         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3042         return $mime;
3043 }
3044
3045 sub blob_mimetype {
3046         my $fd = shift;
3047         my $filename = shift;
3048
3049         if ($filename) {
3050                 my $mime = mimetype_guess($filename);
3051                 $mime and return $mime;
3052         }
3053
3054         # just in case
3055         return $default_blob_plain_mimetype unless $fd;
3056
3057         if (-T $fd) {
3058                 return 'text/plain';
3059         } elsif (! $filename) {
3060                 return 'application/octet-stream';
3061         } elsif ($filename =~ m/\.png$/i) {
3062                 return 'image/png';
3063         } elsif ($filename =~ m/\.gif$/i) {
3064                 return 'image/gif';
3065         } elsif ($filename =~ m/\.jpe?g$/i) {
3066                 return 'image/jpeg';
3067         } else {
3068                 return 'application/octet-stream';
3069         }
3070 }
3071
3072 sub blob_contenttype {
3073         my ($fd, $file_name, $type) = @_;
3074
3075         $type ||= blob_mimetype($fd, $file_name);
3076         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3077                 $type .= "; charset=$default_text_plain_charset";
3078         }
3079
3080         return $type;
3081 }
3082
3083 ## ======================================================================
3084 ## functions printing HTML: header, footer, error page
3085
3086 sub git_header_html {
3087         my $status = shift || "200 OK";
3088         my $expires = shift;
3089
3090         my $title = "$site_name";
3091         if (defined $project) {
3092                 $title .= " - " . to_utf8($project);
3093                 if (defined $action) {
3094                         $title .= "/$action";
3095                         if (defined $file_name) {
3096                                 $title .= " - " . esc_path($file_name);
3097                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3098                                         $title .= "/";
3099                                 }
3100                         }
3101                 }
3102         }
3103         my $content_type;
3104         # require explicit support from the UA if we are to send the page as
3105         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3106         # we have to do this because MSIE sometimes globs '*/*', pretending to
3107         # support xhtml+xml but choking when it gets what it asked for.
3108         if (defined $cgi->http('HTTP_ACCEPT') &&
3109             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3110             $cgi->Accept('application/xhtml+xml') != 0) {
3111                 $content_type = 'application/xhtml+xml';
3112         } else {
3113                 $content_type = 'text/html';
3114         }
3115         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3116                            -status=> $status, -expires => $expires);
3117         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3118         print <<EOF;
3119 <?xml version="1.0" encoding="utf-8"?>
3120 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3121 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3122 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3123 <!-- git core binaries version $git_version -->
3124 <head>
3125 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3126 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3127 <meta name="robots" content="index, nofollow"/>
3128 <title>$title</title>
3129 EOF
3130         # the stylesheet, favicon etc urls won't work correctly with path_info
3131         # unless we set the appropriate base URL
3132         if ($ENV{'PATH_INFO'}) {
3133                 print "<base href=\"".esc_url($base_url)."\" />\n";
3134         }
3135         # print out each stylesheet that exist, providing backwards capability
3136         # for those people who defined $stylesheet in a config file
3137         if (defined $stylesheet) {
3138                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3139         } else {
3140                 foreach my $stylesheet (@stylesheets) {
3141                         next unless $stylesheet;
3142                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3143                 }
3144         }
3145         if (defined $project) {
3146                 my %href_params = get_feed_info();
3147                 if (!exists $href_params{'-title'}) {
3148                         $href_params{'-title'} = 'log';
3149                 }
3150
3151                 foreach my $format qw(RSS Atom) {
3152                         my $type = lc($format);
3153                         my %link_attr = (
3154                                 '-rel' => 'alternate',
3155                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3156                                 '-type' => "application/$type+xml"
3157                         );
3158
3159                         $href_params{'action'} = $type;
3160                         $link_attr{'-href'} = href(%href_params);
3161                         print "<link ".
3162                               "rel=\"$link_attr{'-rel'}\" ".
3163                               "title=\"$link_attr{'-title'}\" ".
3164                               "href=\"$link_attr{'-href'}\" ".
3165                               "type=\"$link_attr{'-type'}\" ".
3166                               "/>\n";
3167
3168                         $href_params{'extra_options'} = '--no-merges';
3169                         $link_attr{'-href'} = href(%href_params);
3170                         $link_attr{'-title'} .= ' (no merges)';
3171                         print "<link ".
3172                               "rel=\"$link_attr{'-rel'}\" ".
3173                               "title=\"$link_attr{'-title'}\" ".
3174                               "href=\"$link_attr{'-href'}\" ".
3175                               "type=\"$link_attr{'-type'}\" ".
3176                               "/>\n";
3177                 }
3178
3179         } else {
3180                 printf('<link rel="alternate" title="%s projects list" '.
3181                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3182                        $site_name, href(project=>undef, action=>"project_index"));
3183                 printf('<link rel="alternate" title="%s projects feeds" '.
3184                        'href="%s" type="text/x-opml" />'."\n",
3185                        $site_name, href(project=>undef, action=>"opml"));
3186         }
3187         if (defined $favicon) {
3188                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3189         }
3190
3191         print "</head>\n" .
3192               "<body>\n";
3193
3194         if (-f $site_header) {
3195                 insert_file($site_header);
3196         }
3197
3198         print "<div class=\"page_header\">\n" .
3199               $cgi->a({-href => esc_url($logo_url),
3200                        -title => $logo_label},
3201                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3202         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3203         if (defined $project) {
3204                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3205                 if (defined $action) {
3206                         print " / $action";
3207                 }
3208                 print "\n";
3209         }
3210         print "</div>\n";
3211
3212         my $have_search = gitweb_check_feature('search');
3213         if (defined $project && $have_search) {
3214                 if (!defined $searchtext) {
3215                         $searchtext = "";
3216                 }
3217                 my $search_hash;
3218                 if (defined $hash_base) {
3219                         $search_hash = $hash_base;
3220                 } elsif (defined $hash) {
3221                         $search_hash = $hash;
3222                 } else {
3223                         $search_hash = "HEAD";
3224                 }
3225                 my $action = $my_uri;
3226                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3227                 if ($use_pathinfo) {
3228                         $action .= "/".esc_url($project);
3229                 }
3230                 print $cgi->startform(-method => "get", -action => $action) .
3231                       "<div class=\"search\">\n" .
3232                       (!$use_pathinfo &&
3233                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3234                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3235                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3236                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3237                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3238                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3239                       " search:\n",
3240                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3241                       "<span title=\"Extended regular expression\">" .
3242                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3243                                      -checked => $search_use_regexp) .
3244                       "</span>" .
3245                       "</div>" .
3246                       $cgi->end_form() . "\n";
3247         }
3248 }
3249
3250 sub git_footer_html {
3251         my $feed_class = 'rss_logo';
3252
3253         print "<div class=\"page_footer\">\n";
3254         if (defined $project) {
3255                 my $descr = git_get_project_description($project);
3256                 if (defined $descr) {
3257                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3258                 }
3259
3260                 my %href_params = get_feed_info();
3261                 if (!%href_params) {
3262                         $feed_class .= ' generic';
3263                 }
3264                 $href_params{'-title'} ||= 'log';
3265
3266                 foreach my $format qw(RSS Atom) {
3267                         $href_params{'action'} = lc($format);
3268                         print $cgi->a({-href => href(%href_params),
3269                                       -title => "$href_params{'-title'} $format feed",
3270                                       -class => $feed_class}, $format)."\n";
3271                 }
3272
3273         } else {
3274                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3275                               -class => $feed_class}, "OPML") . " ";
3276                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3277                               -class => $feed_class}, "TXT") . "\n";
3278         }
3279         print "</div>\n"; # class="page_footer"
3280
3281         if (-f $site_footer) {
3282                 insert_file($site_footer);
3283         }
3284
3285         print "</body>\n" .
3286               "</html>";
3287 }
3288
3289 # die_error(<http_status_code>, <error_message>)
3290 # Example: die_error(404, 'Hash not found')
3291 # By convention, use the following status codes (as defined in RFC 2616):
3292 # 400: Invalid or missing CGI parameters, or
3293 #      requested object exists but has wrong type.
3294 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3295 #      this server or project.
3296 # 404: Requested object/revision/project doesn't exist.
3297 # 500: The server isn't configured properly, or
3298 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3299 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3300 sub die_error {
3301         my $status = shift || 500;
3302         my $error = shift || "Internal server error";
3303
3304         my %http_responses = (400 => '400 Bad Request',
3305                               403 => '403 Forbidden',
3306                               404 => '404 Not Found',
3307                               500 => '500 Internal Server Error');
3308         git_header_html($http_responses{$status});
3309         print <<EOF;
3310 <div class="page_body">
3311 <br /><br />
3312 $status - $error
3313 <br />
3314 </div>
3315 EOF
3316         git_footer_html();
3317         exit;
3318 }
3319
3320 ## ----------------------------------------------------------------------
3321 ## functions printing or outputting HTML: navigation
3322
3323 sub git_print_page_nav {
3324         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3325         $extra = '' if !defined $extra; # pager or formats
3326
3327         my @navs = qw(summary shortlog log commit commitdiff tree);
3328         if ($suppress) {
3329                 @navs = grep { $_ ne $suppress } @navs;
3330         }
3331
3332         my %arg = map { $_ => {action=>$_} } @navs;
3333         if (defined $head) {
3334                 for (qw(commit commitdiff)) {
3335                         $arg{$_}{'hash'} = $head;
3336                 }
3337                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3338                         for (qw(shortlog log)) {
3339                                 $arg{$_}{'hash'} = $head;
3340                         }
3341                 }
3342         }
3343
3344         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3345         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3346
3347         my @actions = gitweb_get_feature('actions');
3348         my %repl = (
3349                 '%' => '%',
3350                 'n' => $project,         # project name
3351                 'f' => $git_dir,         # project path within filesystem
3352                 'h' => $treehead || '',  # current hash ('h' parameter)
3353                 'b' => $treebase || '',  # hash base ('hb' parameter)
3354         );
3355         while (@actions) {
3356                 my ($label, $link, $pos) = splice(@actions,0,3);
3357                 # insert
3358                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3359                 # munch munch
3360                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3361                 $arg{$label}{'_href'} = $link;
3362         }
3363
3364         print "<div class=\"page_nav\">\n" .
3365                 (join " | ",
3366                  map { $_ eq $current ?
3367                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3368                  } @navs);
3369         print "<br/>\n$extra<br/>\n" .
3370               "</div>\n";
3371 }
3372
3373 sub format_paging_nav {
3374         my ($action, $hash, $head, $page, $has_next_link) = @_;
3375         my $paging_nav;
3376
3377
3378         if ($hash ne $head || $page) {
3379                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3380         } else {
3381                 $paging_nav .= "HEAD";
3382         }
3383
3384         if ($page > 0) {
3385                 $paging_nav .= " &sdot; " .
3386                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3387                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3388         } else {
3389                 $paging_nav .= " &sdot; prev";
3390         }
3391
3392         if ($has_next_link) {
3393                 $paging_nav .= " &sdot; " .
3394                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3395                                  -accesskey => "n", -title => "Alt-n"}, "next");
3396         } else {
3397                 $paging_nav .= " &sdot; next";
3398         }
3399
3400         return $paging_nav;
3401 }
3402
3403 ## ......................................................................
3404 ## functions printing or outputting HTML: div
3405
3406 sub git_print_header_div {
3407         my ($action, $title, $hash, $hash_base) = @_;
3408         my %args = ();
3409
3410         $args{'action'} = $action;
3411         $args{'hash'} = $hash if $hash;
3412         $args{'hash_base'} = $hash_base if $hash_base;
3413
3414         print "<div class=\"header\">\n" .
3415               $cgi->a({-href => href(%args), -class => "title"},
3416               $title ? $title : $action) .
3417               "\n</div>\n";
3418 }
3419
3420 sub print_local_time {
3421         my %date = @_;
3422         if ($date{'hour_local'} < 6) {
3423                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3424                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3425         } else {
3426                 printf(" (%02d:%02d %s)",
3427                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3428         }
3429 }
3430
3431 # Outputs the author name and date in long form
3432 sub git_print_authorship {
3433         my $co = shift;
3434         my %opts = @_;
3435         my $tag = $opts{-tag} || 'div';
3436         my $author = $co->{'author_name'};
3437
3438         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3439         print "<$tag class=\"author_date\">" .
3440               format_search_author($author, "author", esc_html($author)) .
3441               " [$ad{'rfc2822'}";
3442         print_local_time(%ad) if ($opts{-localtime});
3443         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3444                   . "</$tag>\n";
3445 }
3446
3447 # Outputs table rows containing the full author or committer information,
3448 # in the format expected for 'commit' view (& similia).
3449 # Parameters are a commit hash reference, followed by the list of people
3450 # to output information for. If the list is empty it defalts to both
3451 # author and committer.
3452 sub git_print_authorship_rows {
3453         my $co = shift;
3454         # too bad we can't use @people = @_ || ('author', 'committer')
3455         my @people = @_;
3456         @people = ('author', 'committer') unless @people;
3457         foreach my $who (@people) {
3458                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3459                 print "<tr><td>$who</td><td>" .
3460                       format_search_author($co->{"${who}_name"}, $who,
3461                                esc_html($co->{"${who}_name"})) . " " .
3462                       format_search_author($co->{"${who}_email"}, $who,
3463                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3464                       "</td><td rowspan=\"2\">" .
3465                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3466                       "</td></tr>\n" .
3467                       "<tr>" .
3468                       "<td></td><td> $wd{'rfc2822'}";
3469                 print_local_time(%wd);
3470                 print "</td>" .
3471                       "</tr>\n";
3472         }
3473 }
3474
3475 sub git_print_page_path {
3476         my $name = shift;
3477         my $type = shift;
3478         my $hb = shift;
3479
3480
3481         print "<div class=\"page_path\">";
3482         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3483                       -title => 'tree root'}, to_utf8("[$project]"));
3484         print " / ";
3485         if (defined $name) {
3486                 my @dirname = split '/', $name;
3487                 my $basename = pop @dirname;
3488                 my $fullname = '';
3489
3490                 foreach my $dir (@dirname) {
3491                         $fullname .= ($fullname ? '/' : '') . $dir;
3492                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3493                                                      hash_base=>$hb),
3494                                       -title => $fullname}, esc_path($dir));
3495                         print " / ";
3496                 }
3497                 if (defined $type && $type eq 'blob') {
3498                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3499                                                      hash_base=>$hb),
3500                                       -title => $name}, esc_path($basename));
3501                 } elsif (defined $type && $type eq 'tree') {
3502                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3503                                                      hash_base=>$hb),
3504                                       -title => $name}, esc_path($basename));
3505                         print " / ";
3506                 } else {
3507                         print esc_path($basename);
3508                 }
3509         }
3510         print "<br/></div>\n";
3511 }
3512
3513 sub git_print_log {
3514         my $log = shift;
3515         my %opts = @_;
3516
3517         if ($opts{'-remove_title'}) {
3518                 # remove title, i.e. first line of log
3519                 shift @$log;
3520         }
3521         # remove leading empty lines
3522         while (defined $log->[0] && $log->[0] eq "") {
3523                 shift @$log;
3524         }
3525
3526         # print log
3527         my $signoff = 0;
3528         my $empty = 0;
3529         foreach my $line (@$log) {
3530                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3531                         $signoff = 1;
3532                         $empty = 0;
3533                         if (! $opts{'-remove_signoff'}) {
3534                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3535                                 next;
3536                         } else {
3537                                 # remove signoff lines
3538                                 next;
3539                         }
3540                 } else {
3541                         $signoff = 0;
3542                 }
3543
3544                 # print only one empty line
3545                 # do not print empty line after signoff
3546                 if ($line eq "") {
3547                         next if ($empty || $signoff);
3548                         $empty = 1;
3549                 } else {
3550                         $empty = 0;
3551                 }
3552
3553                 print format_log_line_html($line) . "<br/>\n";
3554         }
3555
3556         if ($opts{'-final_empty_line'}) {
3557                 # end with single empty line
3558                 print "<br/>\n" unless $empty;
3559         }
3560 }
3561
3562 # return link target (what link points to)
3563 sub git_get_link_target {
3564         my $hash = shift;
3565         my $link_target;
3566
3567         # read link
3568         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3569                 or return;
3570         {
3571                 local $/ = undef;
3572                 $link_target = <$fd>;
3573         }
3574         close $fd
3575                 or return;
3576
3577         return $link_target;
3578 }
3579
3580 # given link target, and the directory (basedir) the link is in,
3581 # return target of link relative to top directory (top tree);
3582 # return undef if it is not possible (including absolute links).
3583 sub normalize_link_target {
3584         my ($link_target, $basedir) = @_;
3585
3586         # absolute symlinks (beginning with '/') cannot be normalized
3587         return if (substr($link_target, 0, 1) eq '/');
3588
3589         # normalize link target to path from top (root) tree (dir)
3590         my $path;
3591         if ($basedir) {
3592                 $path = $basedir . '/' . $link_target;
3593         } else {
3594                 # we are in top (root) tree (dir)
3595                 $path = $link_target;
3596         }
3597
3598         # remove //, /./, and /../
3599         my @path_parts;
3600         foreach my $part (split('/', $path)) {
3601                 # discard '.' and ''
3602                 next if (!$part || $part eq '.');
3603                 # handle '..'
3604                 if ($part eq '..') {
3605                         if (@path_parts) {
3606                                 pop @path_parts;
3607                         } else {
3608                                 # link leads outside repository (outside top dir)
3609                                 return;
3610                         }
3611                 } else {
3612                         push @path_parts, $part;
3613                 }
3614         }
3615         $path = join('/', @path_parts);
3616
3617         return $path;
3618 }
3619
3620 # print tree entry (row of git_tree), but without encompassing <tr> element
3621 sub git_print_tree_entry {
3622         my ($t, $basedir, $hash_base, $have_blame) = @_;
3623
3624         my %base_key = ();
3625         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3626
3627         # The format of a table row is: mode list link.  Where mode is
3628         # the mode of the entry, list is the name of the entry, an href,
3629         # and link is the action links of the entry.
3630
3631         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3632         if (exists $t->{'size'}) {
3633                 print "<td class=\"size\">$t->{'size'}</td>\n";
3634         }
3635         if ($t->{'type'} eq "blob") {
3636                 print "<td class=\"list\">" .
3637                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3638                                                file_name=>"$basedir$t->{'name'}", %base_key),
3639                                 -class => "list"}, esc_path($t->{'name'}));
3640                 if (S_ISLNK(oct $t->{'mode'})) {
3641                         my $link_target = git_get_link_target($t->{'hash'});
3642                         if ($link_target) {
3643                                 my $norm_target = normalize_link_target($link_target, $basedir);
3644                                 if (defined $norm_target) {
3645                                         print " -> " .
3646                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3647                                                                      file_name=>$norm_target),
3648                                                        -title => $norm_target}, esc_path($link_target));
3649                                 } else {
3650                                         print " -> " . esc_path($link_target);
3651                                 }
3652                         }
3653                 }
3654                 print "</td>\n";
3655                 print "<td class=\"link\">";
3656                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3657                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3658                               "blob");
3659                 if ($have_blame) {
3660                         print " | " .
3661                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3662                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3663                                       "blame");
3664                 }
3665                 if (defined $hash_base) {
3666                         print " | " .
3667                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3668                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3669                                       "history");
3670                 }
3671                 print " | " .
3672                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3673                                                file_name=>"$basedir$t->{'name'}")},
3674                                 "raw");
3675                 print "</td>\n";
3676
3677         } elsif ($t->{'type'} eq "tree") {
3678                 print "<td class=\"list\">";
3679                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3680                                              file_name=>"$basedir$t->{'name'}",
3681                                              %base_key)},
3682                               esc_path($t->{'name'}));
3683                 print "</td>\n";
3684                 print "<td class=\"link\">";
3685                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3686                                              file_name=>"$basedir$t->{'name'}",
3687                                              %base_key)},
3688                               "tree");
3689                 if (defined $hash_base) {
3690                         print " | " .
3691                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3692                                                      file_name=>"$basedir$t->{'name'}")},
3693                                       "history");
3694                 }
3695                 print "</td>\n";
3696         } else {
3697                 # unknown object: we can only present history for it
3698                 # (this includes 'commit' object, i.e. submodule support)
3699                 print "<td class=\"list\">" .
3700                       esc_path($t->{'name'}) .
3701                       "</td>\n";
3702                 print "<td class=\"link\">";
3703                 if (defined $hash_base) {
3704                         print $cgi->a({-href => href(action=>"history",
3705                                                      hash_base=>$hash_base,
3706                                                      file_name=>"$basedir$t->{'name'}")},
3707                                       "history");
3708                 }
3709                 print "</td>\n";
3710         }
3711 }
3712
3713 ## ......................................................................
3714 ## functions printing large fragments of HTML
3715
3716 # get pre-image filenames for merge (combined) diff
3717 sub fill_from_file_info {
3718         my ($diff, @parents) = @_;
3719
3720         $diff->{'from_file'} = [ ];
3721         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3722         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3723                 if ($diff->{'status'}[$i] eq 'R' ||
3724                     $diff->{'status'}[$i] eq 'C') {
3725                         $diff->{'from_file'}[$i] =
3726                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3727                 }
3728         }
3729
3730         return $diff;
3731 }
3732
3733 # is current raw difftree line of file deletion
3734 sub is_deleted {
3735         my $diffinfo = shift;
3736
3737         return $diffinfo->{'to_id'} eq ('0' x 40);
3738 }
3739
3740 # does patch correspond to [previous] difftree raw line
3741 # $diffinfo  - hashref of parsed raw diff format
3742 # $patchinfo - hashref of parsed patch diff format
3743 #              (the same keys as in $diffinfo)
3744 sub is_patch_split {
3745         my ($diffinfo, $patchinfo) = @_;
3746
3747         return defined $diffinfo && defined $patchinfo
3748                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3749 }
3750
3751
3752 sub git_difftree_body {
3753         my ($difftree, $hash, @parents) = @_;
3754         my ($parent) = $parents[0];
3755         my $have_blame = gitweb_check_feature('blame');
3756         print "<div class=\"list_head\">\n";
3757         if ($#{$difftree} > 10) {
3758                 print(($#{$difftree} + 1) . " files changed:\n");
3759         }
3760         print "</div>\n";
3761
3762         print "<table class=\"" .
3763               (@parents > 1 ? "combined " : "") .
3764               "diff_tree\">\n";
3765
3766         # header only for combined diff in 'commitdiff' view
3767         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3768         if ($has_header) {
3769                 # table header
3770                 print "<thead><tr>\n" .
3771                        "<th></th><th></th>\n"; # filename, patchN link
3772                 for (my $i = 0; $i < @parents; $i++) {
3773                         my $par = $parents[$i];
3774                         print "<th>" .
3775                               $cgi->a({-href => href(action=>"commitdiff",
3776                                                      hash=>$hash, hash_parent=>$par),
3777                                        -title => 'commitdiff to parent number ' .
3778                                                   ($i+1) . ': ' . substr($par,0,7)},
3779                                       $i+1) .
3780                               "&nbsp;</th>\n";
3781                 }
3782                 print "</tr></thead>\n<tbody>\n";
3783         }
3784
3785         my $alternate = 1;
3786         my $patchno = 0;
3787         foreach my $line (@{$difftree}) {
3788                 my $diff = parsed_difftree_line($line);
3789
3790                 if ($alternate) {
3791                         print "<tr class=\"dark\">\n";
3792                 } else {
3793                         print "<tr class=\"light\">\n";
3794                 }
3795                 $alternate ^= 1;
3796
3797                 if (exists $diff->{'nparents'}) { # combined diff
3798
3799                         fill_from_file_info($diff, @parents)
3800                                 unless exists $diff->{'from_file'};
3801
3802                         if (!is_deleted($diff)) {
3803                                 # file exists in the result (child) commit
3804                                 print "<td>" .
3805                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3806                                                              file_name=>$diff->{'to_file'},
3807                                                              hash_base=>$hash),
3808                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3809                                       "</td>\n";
3810                         } else {
3811                                 print "<td>" .
3812                                       esc_path($diff->{'to_file'}) .
3813                                       "</td>\n";
3814                         }
3815
3816                         if ($action eq 'commitdiff') {
3817                                 # link to patch
3818                                 $patchno++;
3819                                 print "<td class=\"link\">" .
3820                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3821                                       " | " .
3822                                       "</td>\n";
3823                         }
3824
3825                         my $has_history = 0;
3826                         my $not_deleted = 0;
3827                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3828                                 my $hash_parent = $parents[$i];
3829                                 my $from_hash = $diff->{'from_id'}[$i];
3830                                 my $from_path = $diff->{'from_file'}[$i];
3831                                 my $status = $diff->{'status'}[$i];
3832
3833                                 $has_history ||= ($status ne 'A');
3834                                 $not_deleted ||= ($status ne 'D');
3835
3836                                 if ($status eq 'A') {
3837                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3838                                 } elsif ($status eq 'D') {
3839                                         print "<td class=\"link\">" .
3840                                               $cgi->a({-href => href(action=>"blob",
3841                                                                      hash_base=>$hash,
3842                                                                      hash=>$from_hash,
3843                                                                      file_name=>$from_path)},
3844                                                       "blob" . ($i+1)) .
3845                                               " | </td>\n";
3846                                 } else {
3847                                         if ($diff->{'to_id'} eq $from_hash) {
3848                                                 print "<td class=\"link nochange\">";
3849                                         } else {
3850                                                 print "<td class=\"link\">";
3851                                         }
3852                                         print $cgi->a({-href => href(action=>"blobdiff",
3853                                                                      hash=>$diff->{'to_id'},
3854                                                                      hash_parent=>$from_hash,
3855                                                                      hash_base=>$hash,
3856                                                                      hash_parent_base=>$hash_parent,
3857                                                                      file_name=>$diff->{'to_file'},
3858                                                                      file_parent=>$from_path)},
3859                                                       "diff" . ($i+1)) .
3860                                               " | </td>\n";
3861                                 }
3862                         }
3863
3864                         print "<td class=\"link\">";
3865                         if ($not_deleted) {
3866                                 print $cgi->a({-href => href(action=>"blob",
3867                                                              hash=>$diff->{'to_id'},
3868                                                              file_name=>$diff->{'to_file'},
3869                                                              hash_base=>$hash)},
3870                                               "blob");
3871                                 print " | " if ($has_history);
3872                         }
3873                         if ($has_history) {
3874                                 print $cgi->a({-href => href(action=>"history",
3875                                                              file_name=>$diff->{'to_file'},
3876                                                              hash_base=>$hash)},
3877                                               "history");
3878                         }
3879                         print "</td>\n";
3880
3881                         print "</tr>\n";
3882                         next; # instead of 'else' clause, to avoid extra indent
3883                 }
3884                 # else ordinary diff
3885
3886                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3887                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3888                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3889                         $to_mode_oct = oct $diff->{'to_mode'};
3890                         if (S_ISREG($to_mode_oct)) { # only for regular file
3891                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3892                         }
3893                         $to_file_type = file_type($diff->{'to_mode'});
3894                 }
3895                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3896                         $from_mode_oct = oct $diff->{'from_mode'};
3897                         if (S_ISREG($to_mode_oct)) { # only for regular file
3898                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3899                         }
3900                         $from_file_type = file_type($diff->{'from_mode'});
3901                 }
3902
3903                 if ($diff->{'status'} eq "A") { # created
3904                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3905                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3906                         $mode_chng   .= "]</span>";
3907                         print "<td>";
3908                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3909                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3910                                       -class => "list"}, esc_path($diff->{'file'}));
3911                         print "</td>\n";
3912                         print "<td>$mode_chng</td>\n";
3913                         print "<td class=\"link\">";
3914                         if ($action eq 'commitdiff') {
3915                                 # link to patch
3916                                 $patchno++;
3917                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3918                                 print " | ";
3919                         }
3920                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3921                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3922                                       "blob");
3923                         print "</td>\n";
3924
3925                 } elsif ($diff->{'status'} eq "D") { # deleted
3926                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3927                         print "<td>";
3928                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3929                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3930                                        -class => "list"}, esc_path($diff->{'file'}));
3931                         print "</td>\n";
3932                         print "<td>$mode_chng</td>\n";
3933                         print "<td class=\"link\">";
3934                         if ($action eq 'commitdiff') {
3935                                 # link to patch
3936                                 $patchno++;
3937                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3938                                 print " | ";
3939                         }
3940                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3941                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3942                                       "blob") . " | ";
3943                         if ($have_blame) {
3944                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3945                                                              file_name=>$diff->{'file'})},
3946                                               "blame") . " | ";
3947                         }
3948                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3949                                                      file_name=>$diff->{'file'})},
3950                                       "history");
3951                         print "</td>\n";
3952
3953                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3954                         my $mode_chnge = "";
3955                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3956                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3957                                 if ($from_file_type ne $to_file_type) {
3958                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3959                                 }
3960                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3961                                         if ($from_mode_str && $to_mode_str) {
3962                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3963                                         } elsif ($to_mode_str) {
3964                                                 $mode_chnge .= " mode: $to_mode_str";
3965                                         }
3966                                 }
3967                                 $mode_chnge .= "]</span>\n";
3968                         }
3969                         print "<td>";
3970                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3971                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3972                                       -class => "list"}, esc_path($diff->{'file'}));
3973                         print "</td>\n";
3974                         print "<td>$mode_chnge</td>\n";
3975                         print "<td class=\"link\">";
3976                         if ($action eq 'commitdiff') {
3977                                 # link to patch
3978                                 $patchno++;
3979                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3980                                       " | ";
3981                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3982                                 # "commit" view and modified file (not onlu mode changed)
3983                                 print $cgi->a({-href => href(action=>"blobdiff",
3984                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3985                                                              hash_base=>$hash, hash_parent_base=>$parent,
3986                                                              file_name=>$diff->{'file'})},
3987                                               "diff") .
3988                                       " | ";
3989                         }
3990                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3991                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3992                                        "blob") . " | ";
3993                         if ($have_blame) {
3994                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3995                                                              file_name=>$diff->{'file'})},
3996                                               "blame") . " | ";
3997                         }
3998                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3999                                                      file_name=>$diff->{'file'})},
4000                                       "history");
4001                         print "</td>\n";
4002
4003                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4004                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4005                         my $nstatus = $status_name{$diff->{'status'}};
4006                         my $mode_chng = "";
4007                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4008                                 # mode also for directories, so we cannot use $to_mode_str
4009                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4010                         }
4011                         print "<td>" .
4012                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4013                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4014                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4015                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4016                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4017                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4018                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4019                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4020                               "<td class=\"link\">";
4021                         if ($action eq 'commitdiff') {
4022                                 # link to patch
4023                                 $patchno++;
4024                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4025                                       " | ";
4026                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4027                                 # "commit" view and modified file (not only pure rename or copy)
4028                                 print $cgi->a({-href => href(action=>"blobdiff",
4029                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4030                                                              hash_base=>$hash, hash_parent_base=>$parent,
4031                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4032                                               "diff") .
4033                                       " | ";
4034                         }
4035                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4036                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4037                                       "blob") . " | ";
4038                         if ($have_blame) {
4039                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4040                                                              file_name=>$diff->{'to_file'})},
4041                                               "blame") . " | ";
4042                         }
4043                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4044                                                     file_name=>$diff->{'to_file'})},
4045                                       "history");
4046                         print "</td>\n";
4047
4048                 } # we should not encounter Unmerged (U) or Unknown (X) status
4049                 print "</tr>\n";
4050         }
4051         print "</tbody>" if $has_header;
4052         print "</table>\n";
4053 }
4054
4055 sub git_patchset_body {
4056         my ($fd, $difftree, $hash, @hash_parents) = @_;
4057         my ($hash_parent) = $hash_parents[0];
4058
4059         my $is_combined = (@hash_parents > 1);
4060         my $patch_idx = 0;
4061         my $patch_number = 0;
4062         my $patch_line;
4063         my $diffinfo;
4064         my $to_name;
4065         my (%from, %to);
4066
4067         print "<div class=\"patchset\">\n";
4068
4069         # skip to first patch
4070         while ($patch_line = <$fd>) {
4071                 chomp $patch_line;
4072
4073                 last if ($patch_line =~ m/^diff /);
4074         }
4075
4076  PATCH:
4077         while ($patch_line) {
4078
4079                 # parse "git diff" header line
4080                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4081                         # $1 is from_name, which we do not use
4082                         $to_name = unquote($2);
4083                         $to_name =~ s!^b/!!;
4084                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4085                         # $1 is 'cc' or 'combined', which we do not use
4086                         $to_name = unquote($2);
4087                 } else {
4088                         $to_name = undef;
4089                 }
4090
4091                 # check if current patch belong to current raw line
4092                 # and parse raw git-diff line if needed
4093                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4094                         # this is continuation of a split patch
4095                         print "<div class=\"patch cont\">\n";
4096                 } else {
4097                         # advance raw git-diff output if needed
4098                         $patch_idx++ if defined $diffinfo;
4099
4100                         # read and prepare patch information
4101                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4102
4103                         # compact combined diff output can have some patches skipped
4104                         # find which patch (using pathname of result) we are at now;
4105                         if ($is_combined) {
4106                                 while ($to_name ne $diffinfo->{'to_file'}) {
4107                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4108                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4109                                               "</div>\n";  # class="patch"
4110
4111                                         $patch_idx++;
4112                                         $patch_number++;
4113
4114                                         last if $patch_idx > $#$difftree;
4115                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4116                                 }
4117                         }
4118
4119                         # modifies %from, %to hashes
4120                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4121
4122                         # this is first patch for raw difftree line with $patch_idx index
4123                         # we index @$difftree array from 0, but number patches from 1
4124                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4125                 }
4126
4127                 # git diff header
4128                 #assert($patch_line =~ m/^diff /) if DEBUG;
4129                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4130                 $patch_number++;
4131                 # print "git diff" header
4132                 print format_git_diff_header_line($patch_line, $diffinfo,
4133                                                   \%from, \%to);
4134
4135                 # print extended diff header
4136                 print "<div class=\"diff extended_header\">\n";
4137         EXTENDED_HEADER:
4138                 while ($patch_line = <$fd>) {
4139                         chomp $patch_line;
4140
4141                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4142
4143                         print format_extended_diff_header_line($patch_line, $diffinfo,
4144                                                                \%from, \%to);
4145                 }
4146                 print "</div>\n"; # class="diff extended_header"
4147
4148                 # from-file/to-file diff header
4149                 if (! $patch_line) {
4150                         print "</div>\n"; # class="patch"
4151                         last PATCH;
4152                 }
4153                 next PATCH if ($patch_line =~ m/^diff /);
4154                 #assert($patch_line =~ m/^---/) if DEBUG;
4155
4156                 my $last_patch_line = $patch_line;
4157                 $patch_line = <$fd>;
4158                 chomp $patch_line;
4159                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4160
4161                 print format_diff_from_to_header($last_patch_line, $patch_line,
4162                                                  $diffinfo, \%from, \%to,
4163                                                  @hash_parents);
4164
4165                 # the patch itself
4166         LINE:
4167                 while ($patch_line = <$fd>) {
4168                         chomp $patch_line;
4169
4170                         next PATCH if ($patch_line =~ m/^diff /);
4171
4172                         print format_diff_line($patch_line, \%from, \%to);
4173                 }
4174
4175         } continue {
4176                 print "</div>\n"; # class="patch"
4177         }
4178
4179         # for compact combined (--cc) format, with chunk and patch simpliciaction
4180         # patchset might be empty, but there might be unprocessed raw lines
4181         for (++$patch_idx if $patch_number > 0;
4182              $patch_idx < @$difftree;
4183              ++$patch_idx) {
4184                 # read and prepare patch information
4185                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4186
4187                 # generate anchor for "patch" links in difftree / whatchanged part
4188                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4189                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4190                       "</div>\n";  # class="patch"
4191
4192                 $patch_number++;
4193         }
4194
4195         if ($patch_number == 0) {
4196                 if (@hash_parents > 1) {
4197                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4198                 } else {
4199                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4200                 }
4201         }
4202
4203         print "</div>\n"; # class="patchset"
4204 }
4205
4206 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4207
4208 # fills project list info (age, description, owner, forks) for each
4209 # project in the list, removing invalid projects from returned list
4210 # NOTE: modifies $projlist, but does not remove entries from it
4211 sub fill_project_list_info {
4212         my ($projlist, $check_forks, $show_ctags) = @_;
4213         my @projects;
4214
4215  PROJECT:
4216         foreach my $pr (@$projlist) {
4217                 my (@activity) = git_get_last_activity($pr->{'path'});
4218                 unless (@activity) {
4219                         next PROJECT;
4220                 }
4221                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4222                 if (!defined $pr->{'descr'}) {
4223                         my $descr = git_get_project_description($pr->{'path'}) || "";
4224                         $descr = to_utf8($descr);
4225                         $pr->{'descr_long'} = $descr;
4226                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4227                 }
4228                 if (!defined $pr->{'owner'}) {
4229                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4230                 }
4231                 if ($check_forks) {
4232                         my $pname = $pr->{'path'};
4233                         if (($pname =~ s/\.git$//) &&
4234                             ($pname !~ /\/$/) &&
4235                             (-d "$projectroot/$pname")) {
4236                                 $pr->{'forks'} = "-d $projectroot/$pname";
4237                         } else {
4238                                 $pr->{'forks'} = 0;
4239                         }
4240                 }
4241                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4242                 push @projects, $pr;
4243         }
4244
4245         return @projects;
4246 }
4247
4248 # print 'sort by' <th> element, generating 'sort by $name' replay link
4249 # if that order is not selected
4250 sub print_sort_th {
4251         my ($name, $order, $header) = @_;
4252         $header ||= ucfirst($name);
4253
4254         if ($order eq $name) {
4255                 print "<th>$header</th>\n";
4256         } else {
4257                 print "<th>" .
4258                       $cgi->a({-href => href(-replay=>1, order=>$name),
4259                                -class => "header"}, $header) .
4260                       "</th>\n";
4261         }
4262 }
4263
4264 sub git_project_list_ctags {
4265         my ($projects, $action) = @_;
4266         $action ||= 'project_list';
4267
4268         my %ctags;
4269         foreach my $p (@$projects) {
4270                 foreach my $ct (keys %{$p->{'ctags'}}) {
4271                         $ctags{$ct} += $p->{'ctags'}->{$ct};
4272                 }
4273         }
4274         my $cloud = git_populate_project_tagcloud(\%ctags, $action);
4275         print git_show_project_tagcloud($cloud, 64, $action);
4276 }
4277
4278 sub git_project_list_body {
4279         # actually uses global variable $project
4280         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action) = @_;
4281
4282         my $check_forks = gitweb_check_feature('forks');
4283         my $show_ctags = gitweb_check_feature('ctags');
4284         my @projects = fill_project_list_info($projlist, $check_forks, $show_ctags);
4285
4286         $order ||= $default_projects_order;
4287         $from = 0 unless defined $from;
4288         $to = $#projects if (!defined $to || $#projects < $to);
4289
4290         my %order_info = (
4291                 project => { key => 'path', type => 'str' },
4292                 descr => { key => 'descr_long', type => 'str' },
4293                 owner => { key => 'owner', type => 'str' },
4294                 age => { key => 'age', type => 'num' }
4295         );
4296         my $oi = $order_info{$order};
4297         if ($oi->{'type'} eq 'str') {
4298                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4299         } else {
4300                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4301         }
4302
4303         if ($show_ctags) {
4304                 git_project_list_ctags(\@projects, $ctags_action);
4305         }
4306
4307         print "<table class=\"project_list\">\n";
4308         unless ($no_header) {
4309                 print "<tr>\n";
4310                 if ($check_forks) {
4311                         print "<th></th>\n";
4312                 }
4313                 print_sort_th('project', $order, 'Project');
4314                 print_sort_th('descr', $order, 'Description');
4315                 print_sort_th('owner', $order, 'Owner');
4316                 print_sort_th('age', $order, 'Last Change');
4317                 print "<th></th>\n" . # for links
4318                       "</tr>\n";
4319         }
4320         my $alternate = 1;
4321         my $tagfilter = $input_params{'ctag_filter'};
4322         for (my $i = $from; $i <= $to; $i++) {
4323                 my $pr = $projects[$i];
4324
4325                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4326                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4327                         and not $pr->{'descr_long'} =~ /$searchtext/;
4328                 # Weed out forks or non-matching entries of search
4329                 if ($check_forks) {
4330                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4331                         $forkbase="^$forkbase" if $forkbase;
4332                         next if not $searchtext and not $tagfilter and $show_ctags
4333                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4334                 }
4335
4336                 if ($alternate) {
4337                         print "<tr class=\"dark\">\n";
4338                 } else {
4339                         print "<tr class=\"light\">\n";
4340                 }
4341                 $alternate ^= 1;
4342                 if ($check_forks) {
4343                         print "<td>";
4344                         if ($pr->{'forks'}) {
4345                                 print "<!-- $pr->{'forks'} -->\n";
4346                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4347                         }
4348                         print "</td>\n";
4349                 }
4350                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4351                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4352                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4353                                         -class => "list", -title => $pr->{'descr_long'}},
4354                                         esc_html($pr->{'descr'})) . "</td>\n" .
4355                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4356                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4357                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4358                       "<td class=\"link\">" .
4359                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4360                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4361                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4362                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4363                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4364                       "</td>\n" .
4365                       "</tr>\n";
4366         }
4367         if (defined $extra) {
4368                 print "<tr>\n";
4369                 if ($check_forks) {
4370                         print "<td></td>\n";
4371                 }
4372                 print "<td colspan=\"5\">$extra</td>\n" .
4373                       "</tr>\n";
4374         }
4375         print "</table>\n";
4376 }
4377
4378 sub git_project_search_form {
4379         print $cgi->startform(-method => "get") .
4380               "<p class=\"projsearch\">Search:\n" .
4381               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4382               "</p>" .
4383               $cgi->end_form() . "\n";
4384 }
4385
4386 sub git_project_list_all {
4387         my $order = $input_params{'order'};
4388         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4389                 die_error(400, "Unknown order parameter");
4390         }
4391
4392         my @list = git_get_projects_list();
4393         if (!@list) {
4394                 die_error(404, "No projects found");
4395         }
4396
4397         git_project_list_body(\@list, $order);
4398 }
4399
4400 sub git_shortlog_body {
4401         # uses global variable $project
4402         my ($commitlist, $from, $to, $refs, $extra) = @_;
4403
4404         $from = 0 unless defined $from;
4405         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4406
4407         print "<table class=\"shortlog\">\n";
4408         my $alternate = 1;
4409         for (my $i = $from; $i <= $to; $i++) {
4410                 my %co = %{$commitlist->[$i]};
4411                 my $commit = $co{'id'};
4412                 my $ref = format_ref_marker($refs, $commit);
4413                 if ($alternate) {
4414                         print "<tr class=\"dark\">\n";
4415                 } else {
4416                         print "<tr class=\"light\">\n";
4417                 }
4418                 $alternate ^= 1;
4419                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4420                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4421                       format_author_html('td', \%co, 10) . "<td>";
4422                 print format_subject_html($co{'title'}, $co{'title_short'},
4423                                           href(action=>"commit", hash=>$commit), $ref);
4424                 print "</td>\n" .
4425                       "<td class=\"link\">" .
4426                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4427                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4428                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4429                 my $snapshot_links = format_snapshot_links($commit);
4430                 if (defined $snapshot_links) {
4431                         print " | " . $snapshot_links;
4432                 }
4433                 print "</td>\n" .
4434                       "</tr>\n";
4435         }
4436         if (defined $extra) {
4437                 print "<tr>\n" .
4438                       "<td colspan=\"4\">$extra</td>\n" .
4439                       "</tr>\n";
4440         }
4441         print "</table>\n";
4442 }
4443
4444 sub git_history_body {
4445         # Warning: assumes constant type (blob or tree) during history
4446         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4447
4448         $from = 0 unless defined $from;
4449         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4450
4451         print "<table class=\"history\">\n";
4452         my $alternate = 1;
4453         for (my $i = $from; $i <= $to; $i++) {
4454                 my %co = %{$commitlist->[$i]};
4455                 if (!%co) {
4456                         next;
4457                 }
4458                 my $commit = $co{'id'};
4459
4460                 my $ref = format_ref_marker($refs, $commit);
4461
4462                 if ($alternate) {
4463                         print "<tr class=\"dark\">\n";
4464                 } else {
4465                         print "<tr class=\"light\">\n";
4466                 }
4467                 $alternate ^= 1;
4468                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4469         # shortlog:   format_author_html('td', \%co, 10)
4470                       format_author_html('td', \%co, 15, 3) . "<td>";
4471                 # originally git_history used chop_str($co{'title'}, 50)
4472                 print format_subject_html($co{'title'}, $co{'title_short'},
4473                                           href(action=>"commit", hash=>$commit), $ref);
4474                 print "</td>\n" .
4475                       "<td class=\"link\">" .
4476                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4477                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4478
4479                 if ($ftype eq 'blob') {
4480                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4481                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4482                         if (defined $blob_current && defined $blob_parent &&
4483                                         $blob_current ne $blob_parent) {
4484                                 print " | " .
4485                                         $cgi->a({-href => href(action=>"blobdiff",
4486                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4487                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4488                                                                file_name=>$file_name)},
4489                                                 "diff to current");
4490                         }
4491                 }
4492                 print "</td>\n" .
4493                       "</tr>\n";
4494         }
4495         if (defined $extra) {
4496                 print "<tr>\n" .
4497                       "<td colspan=\"4\">$extra</td>\n" .
4498                       "</tr>\n";
4499         }
4500         print "</table>\n";
4501 }
4502
4503 sub git_tags_body {
4504         # uses global variable $project
4505         my ($taglist, $from, $to, $extra) = @_;
4506         $from = 0 unless defined $from;
4507         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4508
4509         print "<table class=\"tags\">\n";
4510         my $alternate = 1;
4511         for (my $i = $from; $i <= $to; $i++) {
4512                 my $entry = $taglist->[$i];
4513                 my %tag = %$entry;
4514                 my $comment = $tag{'subject'};
4515                 my $comment_short;
4516                 if (defined $comment) {
4517                         $comment_short = chop_str($comment, 30, 5);
4518                 }
4519                 if ($alternate) {
4520                         print "<tr class=\"dark\">\n";
4521                 } else {
4522                         print "<tr class=\"light\">\n";
4523                 }
4524                 $alternate ^= 1;
4525                 if (defined $tag{'age'}) {
4526                         print "<td><i>$tag{'age'}</i></td>\n";
4527                 } else {
4528                         print "<td></td>\n";
4529                 }
4530                 print "<td>" .
4531                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4532                                -class => "list name"}, esc_html($tag{'name'})) .
4533                       "</td>\n" .
4534                       "<td>";
4535                 if (defined $comment) {
4536                         print format_subject_html($comment, $comment_short,
4537                                                   href(action=>"tag", hash=>$tag{'id'}));
4538                 }
4539                 print "</td>\n" .
4540                       "<td class=\"selflink\">";
4541                 if ($tag{'type'} eq "tag") {
4542                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4543                 } else {
4544                         print "&nbsp;";
4545                 }
4546                 print "</td>\n" .
4547                       "<td class=\"link\">" . " | " .
4548                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4549                 if ($tag{'reftype'} eq "commit") {
4550                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4551                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4552                 } elsif ($tag{'reftype'} eq "blob") {
4553                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4554                 }
4555                 print "</td>\n" .
4556                       "</tr>";
4557         }
4558         if (defined $extra) {
4559                 print "<tr>\n" .
4560                       "<td colspan=\"5\">$extra</td>\n" .
4561                       "</tr>\n";
4562         }
4563         print "</table>\n";
4564 }
4565
4566 sub git_heads_body {
4567         # uses global variable $project
4568         my ($headlist, $head, $from, $to, $extra) = @_;
4569         $from = 0 unless defined $from;
4570         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4571
4572         print "<table class=\"heads\">\n";
4573         my $alternate = 1;
4574         for (my $i = $from; $i <= $to; $i++) {
4575                 my $entry = $headlist->[$i];
4576                 my %ref = %$entry;
4577                 my $curr = $ref{'id'} eq $head;
4578                 if ($alternate) {
4579                         print "<tr class=\"dark\">\n";
4580                 } else {
4581                         print "<tr class=\"light\">\n";
4582                 }
4583                 $alternate ^= 1;
4584                 print "<td><i>$ref{'age'}</i></td>\n" .
4585                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4586                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4587                                -class => "list name"},esc_html($ref{'name'})) .
4588                       "</td>\n" .
4589                       "<td class=\"link\">" .
4590                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4591                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4592                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4593                       "</td>\n" .
4594                       "</tr>";
4595         }
4596         if (defined $extra) {
4597                 print "<tr>\n" .
4598                       "<td colspan=\"3\">$extra</td>\n" .
4599                       "</tr>\n";
4600         }
4601         print "</table>\n";
4602 }
4603
4604 sub git_search_grep_body {
4605         my ($commitlist, $from, $to, $extra) = @_;
4606         $from = 0 unless defined $from;
4607         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4608
4609         print "<table class=\"commit_search\">\n";
4610         my $alternate = 1;
4611         for (my $i = $from; $i <= $to; $i++) {
4612                 my %co = %{$commitlist->[$i]};
4613                 if (!%co) {
4614                         next;
4615                 }
4616                 my $commit = $co{'id'};
4617                 if ($alternate) {
4618                         print "<tr class=\"dark\">\n";
4619                 } else {
4620                         print "<tr class=\"light\">\n";
4621                 }
4622                 $alternate ^= 1;
4623                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4624                       format_author_html('td', \%co, 15, 5) .
4625                       "<td>" .
4626                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4627                                -class => "list subject"},
4628                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4629                 my $comment = $co{'comment'};
4630                 foreach my $line (@$comment) {
4631                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4632                                 my ($lead, $match, $trail) = ($1, $2, $3);
4633                                 $match = chop_str($match, 70, 5, 'center');
4634                                 my $contextlen = int((80 - length($match))/2);
4635                                 $contextlen = 30 if ($contextlen > 30);
4636                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4637                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4638
4639                                 $lead  = esc_html($lead);
4640                                 $match = esc_html($match);
4641                                 $trail = esc_html($trail);
4642
4643                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4644                         }
4645                 }
4646                 print "</td>\n" .
4647                       "<td class=\"link\">" .
4648                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4649                       " | " .
4650                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4651                       " | " .
4652                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4653                 print "</td>\n" .
4654                       "</tr>\n";
4655         }
4656         if (defined $extra) {
4657                 print "<tr>\n" .
4658                       "<td colspan=\"3\">$extra</td>\n" .
4659                       "</tr>\n";
4660         }
4661         print "</table>\n";
4662 }
4663
4664 ## ======================================================================
4665 ## ======================================================================
4666 ## actions
4667
4668 sub git_project_list {
4669         git_header_html();
4670         if (-f $home_text) {
4671                 print "<div class=\"index_include\">\n";
4672                 insert_file($home_text);
4673                 print "</div>\n";
4674         }
4675         git_project_search_form();
4676         git_project_list_all();
4677         git_footer_html();
4678 }
4679
4680 sub git_forks {
4681         my $order = $input_params{'order'};
4682         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4683                 die_error(400, "Unknown order parameter");
4684         }
4685
4686         my @list = git_get_projects_list($project);
4687         if (!@list) {
4688                 die_error(404, "No forks found");
4689         }
4690
4691         git_header_html();
4692         git_print_page_nav('','');
4693         git_print_header_div('summary', "$project forks");
4694         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
4695         git_footer_html();
4696 }
4697
4698 sub git_project_index {
4699         my @projects = git_get_projects_list($project);
4700
4701         print $cgi->header(
4702                 -type => 'text/plain',
4703                 -charset => 'utf-8',
4704                 -content_disposition => 'inline; filename="index.aux"');
4705
4706         foreach my $pr (@projects) {
4707                 if (!exists $pr->{'owner'}) {
4708                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4709                 }
4710
4711                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4712                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4713                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4714                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4715                 $path  =~ s/ /\+/g;
4716                 $owner =~ s/ /\+/g;
4717
4718                 print "$path $owner\n";
4719         }
4720 }
4721
4722 sub git_summary {
4723         my $descr = git_get_project_description($project) || "none";
4724         my %co = parse_commit("HEAD");
4725         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4726         my $head = $co{'id'};
4727
4728         my $owner = git_get_project_owner($project);
4729
4730         my $refs = git_get_references();
4731         # These get_*_list functions return one more to allow us to see if
4732         # there are more ...
4733         my @taglist  = git_get_tags_list(16);
4734         my @headlist = git_get_heads_list(16);
4735         my @forklist;
4736         my $check_forks = gitweb_check_feature('forks');
4737
4738         if ($check_forks) {
4739                 @forklist = git_get_projects_list($project);
4740         }
4741
4742         git_header_html();
4743         git_print_page_nav('summary','', $head);
4744
4745         print "<div class=\"title\">&nbsp;</div>\n";
4746         print "<table class=\"projects_list\">\n" .
4747               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4748               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4749         if (defined $cd{'rfc2822'}) {
4750                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4751         }
4752
4753         # use per project git URL list in $projectroot/$project/cloneurl
4754         # or make project git URL from git base URL and project name
4755         my $url_tag = "URL";
4756         my @url_list = git_get_project_url_list($project);
4757         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4758         foreach my $git_url (@url_list) {
4759                 next unless $git_url;
4760                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4761                 $url_tag = "";
4762         }
4763
4764         # Tag cloud
4765         my $show_ctags = gitweb_check_feature('ctags');
4766         if ($show_ctags) {
4767                 my $ctags = git_get_project_ctags($project);
4768                 my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
4769                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4770                 print "</td>\n<td>" unless %$ctags;
4771                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4772                 print "</td>\n<td>" if %$ctags;
4773                 print git_show_project_tagcloud($cloud, 48, 'project_list');
4774                 print "</td></tr>";
4775         }
4776
4777         print "</table>\n";
4778
4779         # If XSS prevention is on, we don't include README.html.
4780         # TODO: Allow a readme in some safe format.
4781         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4782                 print "<div class=\"title\">readme</div>\n" .
4783                       "<div class=\"readme\">\n";
4784                 insert_file("$projectroot/$project/README.html");
4785                 print "\n</div>\n"; # class="readme"
4786         }
4787
4788         # we need to request one more than 16 (0..15) to check if
4789         # those 16 are all
4790         my @commitlist = $head ? parse_commits($head, 17) : ();
4791         if (@commitlist) {
4792                 git_print_header_div('shortlog');
4793                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4794                                   $#commitlist <=  15 ? undef :
4795                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4796         }
4797
4798         if (@taglist) {
4799                 git_print_header_div('tags');
4800                 git_tags_body(\@taglist, 0, 15,
4801                               $#taglist <=  15 ? undef :
4802                               $cgi->a({-href => href(action=>"tags")}, "..."));
4803         }
4804
4805         if (@headlist) {
4806                 git_print_header_div('heads');
4807                 git_heads_body(\@headlist, $head, 0, 15,
4808                                $#headlist <= 15 ? undef :
4809                                $cgi->a({-href => href(action=>"heads")}, "..."));
4810         }
4811
4812         if (@forklist) {
4813                 git_print_header_div('forks');
4814                 git_project_list_body(\@forklist, 'age', 0, 15,
4815                                       $#forklist <= 15 ? undef :
4816                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4817                                       'no_header', 'forks');
4818         }
4819
4820         git_footer_html();
4821 }
4822
4823 sub git_tag {
4824         my $head = git_get_head_hash($project);
4825         git_header_html();
4826         git_print_page_nav('','', $head,undef,$head);
4827         my %tag = parse_tag($hash);
4828
4829         if (! %tag) {
4830                 die_error(404, "Unknown tag object");
4831         }
4832
4833         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4834         print "<div class=\"title_text\">\n" .
4835               "<table class=\"object_header\">\n" .
4836               "<tr>\n" .
4837               "<td>object</td>\n" .
4838               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4839                                $tag{'object'}) . "</td>\n" .
4840               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4841                                               $tag{'type'}) . "</td>\n" .
4842               "</tr>\n";
4843         if (defined($tag{'author'})) {
4844                 git_print_authorship_rows(\%tag, 'author');
4845         }
4846         print "</table>\n\n" .
4847               "</div>\n";
4848         print "<div class=\"page_body\">";
4849         my $comment = $tag{'comment'};
4850         foreach my $line (@$comment) {
4851                 chomp $line;
4852                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4853         }
4854         print "</div>\n";
4855         git_footer_html();
4856 }
4857
4858 sub git_blame {
4859         # permissions
4860         gitweb_check_feature('blame')
4861                 or die_error(403, "Blame view not allowed");
4862
4863         # error checking
4864         die_error(400, "No file name given") unless $file_name;
4865         $hash_base ||= git_get_head_hash($project);
4866         die_error(404, "Couldn't find base commit") unless $hash_base;
4867         my %co = parse_commit($hash_base)
4868                 or die_error(404, "Commit not found");
4869         my $ftype = "blob";
4870         if (!defined $hash) {
4871                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4872                         or die_error(404, "Error looking up file");
4873         } else {
4874                 $ftype = git_get_type($hash);
4875                 if ($ftype !~ "blob") {
4876                         die_error(400, "Object is not a blob");
4877                 }
4878         }
4879
4880         # run git-blame --porcelain
4881         open my $fd, "-|", git_cmd(), "blame", '-p',
4882                 $hash_base, '--', $file_name
4883                 or die_error(500, "Open git-blame failed");
4884
4885         # page header
4886         git_header_html();
4887         my $formats_nav =
4888                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4889                         "blob") .
4890                 " | " .
4891                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4892                         "history") .
4893                 " | " .
4894                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4895                         "HEAD");
4896         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4897         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4898         git_print_page_path($file_name, $ftype, $hash_base);
4899
4900         # page body
4901         my @rev_color = qw(light dark);
4902         my $num_colors = scalar(@rev_color);
4903         my $current_color = 0;
4904         my %metainfo = ();
4905
4906         print <<HTML;
4907 <div class="page_body">
4908 <table class="blame">
4909 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4910 HTML
4911  LINE:
4912         while (my $line = <$fd>) {
4913                 chomp $line;
4914                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4915                 # no <lines in group> for subsequent lines in group of lines
4916                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4917                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4918                 if (!exists $metainfo{$full_rev}) {
4919                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4920                 }
4921                 my $meta = $metainfo{$full_rev};
4922                 my $data;
4923                 while ($data = <$fd>) {
4924                         chomp $data;
4925                         last if ($data =~ s/^\t//); # contents of line
4926                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4927                                 $meta->{$1} = $2 unless exists $meta->{$1};
4928                         }
4929                         if ($data =~ /^previous /) {
4930                                 $meta->{'nprevious'}++;
4931                         }
4932                 }
4933                 my $short_rev = substr($full_rev, 0, 8);
4934                 my $author = $meta->{'author'};
4935                 my %date =
4936                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4937                 my $date = $date{'iso-tz'};
4938                 if ($group_size) {
4939                         $current_color = ($current_color + 1) % $num_colors;
4940                 }
4941                 my $tr_class = $rev_color[$current_color];
4942                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4943                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4944                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4945                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4946                 if ($group_size) {
4947                         print "<td class=\"sha1\"";
4948                         print " title=\"". esc_html($author) . ", $date\"";
4949                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4950                         print ">";
4951                         print $cgi->a({-href => href(action=>"commit",
4952                                                      hash=>$full_rev,
4953                                                      file_name=>$file_name)},
4954                                       esc_html($short_rev));
4955                         if ($group_size >= 2) {
4956                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4957                                 if (@author_initials) {
4958                                         print "<br />" .
4959                                               esc_html(join('', @author_initials));
4960                                         #           or join('.', ...)
4961                                 }
4962                         }
4963                         print "</td>\n";
4964                 }
4965                 # 'previous' <sha1 of parent commit> <filename at commit>
4966                 if (exists $meta->{'previous'} &&
4967                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4968                         $meta->{'parent'} = $1;
4969                         $meta->{'file_parent'} = unquote($2);
4970                 }
4971                 my $linenr_commit =
4972                         exists($meta->{'parent'}) ?
4973                         $meta->{'parent'} : $full_rev;
4974                 my $linenr_filename =
4975                         exists($meta->{'file_parent'}) ?
4976                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4977                 my $blamed = href(action => 'blame',
4978                                   file_name => $linenr_filename,
4979                                   hash_base => $linenr_commit);
4980                 print "<td class=\"linenr\">";
4981                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4982                                 -class => "linenr" },
4983                               esc_html($lineno));
4984                 print "</td>";
4985                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4986                 print "</tr>\n";
4987         }
4988         print "</table>\n";
4989         print "</div>";
4990         close $fd
4991                 or print "Reading blob failed\n";
4992
4993         # page footer
4994         git_footer_html();
4995 }
4996
4997 sub git_tags {
4998         my $head = git_get_head_hash($project);
4999         git_header_html();
5000         git_print_page_nav('','', $head,undef,$head);
5001         git_print_header_div('summary', $project);
5002
5003         my @tagslist = git_get_tags_list();
5004         if (@tagslist) {
5005                 git_tags_body(\@tagslist);
5006         }
5007         git_footer_html();
5008 }
5009
5010 sub git_heads {
5011         my $head = git_get_head_hash($project);
5012         git_header_html();
5013         git_print_page_nav('','', $head,undef,$head);
5014         git_print_header_div('summary', $project);
5015
5016         my @headslist = git_get_heads_list();
5017         if (@headslist) {
5018                 git_heads_body(\@headslist, $head);
5019         }
5020         git_footer_html();
5021 }
5022
5023 sub git_blob_plain {
5024         my $type = shift;
5025         my $expires;
5026
5027         if (!defined $hash) {
5028                 if (defined $file_name) {
5029                         my $base = $hash_base || git_get_head_hash($project);
5030                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5031                                 or die_error(404, "Cannot find file");
5032                 } else {
5033                         die_error(400, "No file name defined");
5034                 }
5035         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5036                 # blobs defined by non-textual hash id's can be cached
5037                 $expires = "+1d";
5038         }
5039
5040         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5041                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5042
5043         # content-type (can include charset)
5044         $type = blob_contenttype($fd, $file_name, $type);
5045
5046         # "save as" filename, even when no $file_name is given
5047         my $save_as = "$hash";
5048         if (defined $file_name) {
5049                 $save_as = $file_name;
5050         } elsif ($type =~ m/^text\//) {
5051                 $save_as .= '.txt';
5052         }
5053
5054         # With XSS prevention on, blobs of all types except a few known safe
5055         # ones are served with "Content-Disposition: attachment" to make sure
5056         # they don't run in our security domain.  For certain image types,
5057         # blob view writes an <img> tag referring to blob_plain view, and we
5058         # want to be sure not to break that by serving the image as an
5059         # attachment (though Firefox 3 doesn't seem to care).
5060         my $sandbox = $prevent_xss &&
5061                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5062
5063         print $cgi->header(
5064                 -type => $type,
5065                 -expires => $expires,
5066                 -content_disposition =>
5067                         ($sandbox ? 'attachment' : 'inline')
5068                         . '; filename="' . $save_as . '"');
5069         local $/ = undef;
5070         binmode STDOUT, ':raw';
5071         print <$fd>;
5072         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5073         close $fd;
5074 }
5075
5076 sub git_blob {
5077         my $expires;
5078
5079         if (!defined $hash) {
5080                 if (defined $file_name) {
5081                         my $base = $hash_base || git_get_head_hash($project);
5082                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5083                                 or die_error(404, "Cannot find file");
5084                 } else {
5085                         die_error(400, "No file name defined");
5086                 }
5087         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5088                 # blobs defined by non-textual hash id's can be cached
5089                 $expires = "+1d";
5090         }
5091
5092         my $have_blame = gitweb_check_feature('blame');
5093         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5094                 or die_error(500, "Couldn't cat $file_name, $hash");
5095         my $mimetype = blob_mimetype($fd, $file_name);
5096         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5097                 close $fd;
5098                 return git_blob_plain($mimetype);
5099         }
5100         # we can have blame only for text/* mimetype
5101         $have_blame &&= ($mimetype =~ m!^text/!);
5102
5103         git_header_html(undef, $expires);
5104         my $formats_nav = '';
5105         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5106                 if (defined $file_name) {
5107                         if ($have_blame) {
5108                                 $formats_nav .=
5109                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5110                                                 "blame") .
5111                                         " | ";
5112                         }
5113                         $formats_nav .=
5114                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5115                                         "history") .
5116                                 " | " .
5117                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5118                                         "raw") .
5119                                 " | " .
5120                                 $cgi->a({-href => href(action=>"blob",
5121                                                        hash_base=>"HEAD", file_name=>$file_name)},
5122                                         "HEAD");
5123                 } else {
5124                         $formats_nav .=
5125                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5126                                         "raw");
5127                 }
5128                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5129                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5130         } else {
5131                 print "<div class=\"page_nav\">\n" .
5132                       "<br/><br/></div>\n" .
5133                       "<div class=\"title\">$hash</div>\n";
5134         }
5135         git_print_page_path($file_name, "blob", $hash_base);
5136         print "<div class=\"page_body\">\n";
5137         if ($mimetype =~ m!^image/!) {
5138                 print qq!<img type="$mimetype"!;
5139                 if ($file_name) {
5140                         print qq! alt="$file_name" title="$file_name"!;
5141                 }
5142                 print qq! src="! .
5143                       href(action=>"blob_plain", hash=>$hash,
5144                            hash_base=>$hash_base, file_name=>$file_name) .
5145                       qq!" />\n!;
5146         } else {
5147                 my $nr;
5148                 while (my $line = <$fd>) {
5149                         chomp $line;
5150                         $nr++;
5151                         $line = untabify($line);
5152                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5153                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5154                 }
5155         }
5156         close $fd
5157                 or print "Reading blob failed.\n";
5158         print "</div>";
5159         git_footer_html();
5160 }
5161
5162 sub git_tree {
5163         if (!defined $hash_base) {
5164                 $hash_base = "HEAD";
5165         }
5166         if (!defined $hash) {
5167                 if (defined $file_name) {
5168                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5169                 } else {
5170                         $hash = $hash_base;
5171                 }
5172         }
5173         die_error(404, "No such tree") unless defined($hash);
5174
5175         my $show_sizes = gitweb_check_feature('show-sizes');
5176         my $have_blame = gitweb_check_feature('blame');
5177
5178         my @entries = ();
5179         {
5180                 local $/ = "\0";
5181                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5182                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5183                         or die_error(500, "Open git-ls-tree failed");
5184                 @entries = map { chomp; $_ } <$fd>;
5185                 close $fd
5186                         or die_error(404, "Reading tree failed");
5187         }
5188
5189         my $refs = git_get_references();
5190         my $ref = format_ref_marker($refs, $hash_base);
5191         git_header_html();
5192         my $basedir = '';
5193         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5194                 my @views_nav = ();
5195                 if (defined $file_name) {
5196                         push @views_nav,
5197                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5198                                         "history"),
5199                                 $cgi->a({-href => href(action=>"tree",
5200                                                        hash_base=>"HEAD", file_name=>$file_name)},
5201                                         "HEAD"),
5202                 }
5203                 my $snapshot_links = format_snapshot_links($hash);
5204                 if (defined $snapshot_links) {
5205                         # FIXME: Should be available when we have no hash base as well.
5206                         push @views_nav, $snapshot_links;
5207                 }
5208                 git_print_page_nav('tree','', $hash_base, undef, undef,
5209                                    join(' | ', @views_nav));
5210                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5211         } else {
5212                 undef $hash_base;
5213                 print "<div class=\"page_nav\">\n";
5214                 print "<br/><br/></div>\n";
5215                 print "<div class=\"title\">$hash</div>\n";
5216         }
5217         if (defined $file_name) {
5218                 $basedir = $file_name;
5219                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5220                         $basedir .= '/';
5221                 }
5222                 git_print_page_path($file_name, 'tree', $hash_base);
5223         }
5224         print "<div class=\"page_body\">\n";
5225         print "<table class=\"tree\">\n";
5226         my $alternate = 1;
5227         # '..' (top directory) link if possible
5228         if (defined $hash_base &&
5229             defined $file_name && $file_name =~ m![^/]+$!) {
5230                 if ($alternate) {
5231                         print "<tr class=\"dark\">\n";
5232                 } else {
5233                         print "<tr class=\"light\">\n";
5234                 }
5235                 $alternate ^= 1;
5236
5237                 my $up = $file_name;
5238                 $up =~ s!/?[^/]+$!!;
5239                 undef $up unless $up;
5240                 # based on git_print_tree_entry
5241                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5242                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5243                 print '<td class="list">';
5244                 print $cgi->a({-href => href(action=>"tree",
5245                                              hash_base=>$hash_base,
5246                                              file_name=>$up)},
5247                               "..");
5248                 print "</td>\n";
5249                 print "<td class=\"link\"></td>\n";
5250
5251                 print "</tr>\n";
5252         }
5253         foreach my $line (@entries) {
5254                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5255
5256                 if ($alternate) {
5257                         print "<tr class=\"dark\">\n";
5258                 } else {
5259                         print "<tr class=\"light\">\n";
5260                 }
5261                 $alternate ^= 1;
5262
5263                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5264
5265                 print "</tr>\n";
5266         }
5267         print "</table>\n" .
5268               "</div>";
5269         git_footer_html();
5270 }
5271
5272 sub git_snapshot {
5273         my $format = $input_params{'snapshot_format'};
5274         if (!@snapshot_fmts) {
5275                 die_error(403, "Snapshots not allowed");
5276         }
5277         # default to first supported snapshot format
5278         $format ||= $snapshot_fmts[0];
5279         if ($format !~ m/^[a-z0-9]+$/) {
5280                 die_error(400, "Invalid snapshot format parameter");
5281         } elsif (!exists($known_snapshot_formats{$format})) {
5282                 die_error(400, "Unknown snapshot format");
5283         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5284                 die_error(403, "Snapshot format not allowed");
5285         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5286                 die_error(403, "Unsupported snapshot format");
5287         }
5288
5289         if (!defined $hash) {
5290                 $hash = git_get_head_hash($project);
5291         }
5292
5293         my $name = $project;
5294         $name =~ s,([^/])/*\.git$,$1,;
5295         $name = basename($name);
5296         my $filename = to_utf8($name);
5297         $name =~ s/\047/\047\\\047\047/g;
5298         my $cmd;
5299         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5300         $cmd = quote_command(
5301                 git_cmd(), 'archive',
5302                 "--format=$known_snapshot_formats{$format}{'format'}",
5303                 "--prefix=$name/", $hash);
5304         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5305                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5306         }
5307
5308         print $cgi->header(
5309                 -type => $known_snapshot_formats{$format}{'type'},
5310                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5311                 -status => '200 OK');
5312
5313         open my $fd, "-|", $cmd
5314                 or die_error(500, "Execute git-archive failed");
5315         binmode STDOUT, ':raw';
5316         print <$fd>;
5317         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5318         close $fd;
5319 }
5320
5321 sub git_log {
5322         my $head = git_get_head_hash($project);
5323         if (!defined $hash) {
5324                 $hash = $head;
5325         }
5326         if (!defined $page) {
5327                 $page = 0;
5328         }
5329         my $refs = git_get_references();
5330
5331         my @commitlist = parse_commits($hash, 101, (100 * $page));
5332
5333         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5334
5335         my ($patch_max) = gitweb_get_feature('patches');
5336         if ($patch_max) {
5337                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5338                         $paging_nav .= " &sdot; " .
5339                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5340                                         "patches");
5341                 }
5342         }
5343
5344         git_header_html();
5345         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5346
5347         if (!@commitlist) {
5348                 my %co = parse_commit($hash);
5349
5350                 git_print_header_div('summary', $project);
5351                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5352         }
5353         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5354         for (my $i = 0; $i <= $to; $i++) {
5355                 my %co = %{$commitlist[$i]};
5356                 next if !%co;
5357                 my $commit = $co{'id'};
5358                 my $ref = format_ref_marker($refs, $commit);
5359                 my %ad = parse_date($co{'author_epoch'});
5360                 git_print_header_div('commit',
5361                                "<span class=\"age\">$co{'age_string'}</span>" .
5362                                esc_html($co{'title'}) . $ref,
5363                                $commit);
5364                 print "<div class=\"title_text\">\n" .
5365                       "<div class=\"log_link\">\n" .
5366                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5367                       " | " .
5368                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5369                       " | " .
5370                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5371                       "<br/>\n" .
5372                       "</div>\n";
5373                       git_print_authorship(\%co, -tag => 'span');
5374                       print "<br/>\n</div>\n";
5375
5376                 print "<div class=\"log_body\">\n";
5377                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5378                 print "</div>\n";
5379         }
5380         if ($#commitlist >= 100) {
5381                 print "<div class=\"page_nav\">\n";
5382                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5383                                -accesskey => "n", -title => "Alt-n"}, "next");
5384                 print "</div>\n";
5385         }
5386         git_footer_html();
5387 }
5388
5389 sub git_commit {
5390         $hash ||= $hash_base || "HEAD";
5391         my %co = parse_commit($hash)
5392             or die_error(404, "Unknown commit object");
5393
5394         my $parent  = $co{'parent'};
5395         my $parents = $co{'parents'}; # listref
5396
5397         # we need to prepare $formats_nav before any parameter munging
5398         my $formats_nav;
5399         if (!defined $parent) {
5400                 # --root commitdiff
5401                 $formats_nav .= '(initial)';
5402         } elsif (@$parents == 1) {
5403                 # single parent commit
5404                 $formats_nav .=
5405                         '(parent: ' .
5406                         $cgi->a({-href => href(action=>"commit",
5407                                                hash=>$parent)},
5408                                 esc_html(substr($parent, 0, 7))) .
5409                         ')';
5410         } else {
5411                 # merge commit
5412                 $formats_nav .=
5413                         '(merge: ' .
5414                         join(' ', map {
5415                                 $cgi->a({-href => href(action=>"commit",
5416                                                        hash=>$_)},
5417                                         esc_html(substr($_, 0, 7)));
5418                         } @$parents ) .
5419                         ')';
5420         }
5421         if (gitweb_check_feature('patches') && @$parents <= 1) {
5422                 $formats_nav .= " | " .
5423                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5424                                 "patch");
5425         }
5426
5427         if (!defined $parent) {
5428                 $parent = "--root";
5429         }
5430         my @difftree;
5431         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5432                 @diff_opts,
5433                 (@$parents <= 1 ? $parent : '-c'),
5434                 $hash, "--"
5435                 or die_error(500, "Open git-diff-tree failed");
5436         @difftree = map { chomp; $_ } <$fd>;
5437         close $fd or die_error(404, "Reading git-diff-tree failed");
5438
5439         # non-textual hash id's can be cached
5440         my $expires;
5441         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5442                 $expires = "+1d";
5443         }
5444         my $refs = git_get_references();
5445         my $ref = format_ref_marker($refs, $co{'id'});
5446
5447         git_header_html(undef, $expires);
5448         git_print_page_nav('commit', '',
5449                            $hash, $co{'tree'}, $hash,
5450                            $formats_nav);
5451
5452         if (defined $co{'parent'}) {
5453                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5454         } else {
5455                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5456         }
5457         print "<div class=\"title_text\">\n" .
5458               "<table class=\"object_header\">\n";
5459         git_print_authorship_rows(\%co);
5460         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5461         print "<tr>" .
5462               "<td>tree</td>" .
5463               "<td class=\"sha1\">" .
5464               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5465                        class => "list"}, $co{'tree'}) .
5466               "</td>" .
5467               "<td class=\"link\">" .
5468               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5469                       "tree");
5470         my $snapshot_links = format_snapshot_links($hash);
5471         if (defined $snapshot_links) {
5472                 print " | " . $snapshot_links;
5473         }
5474         print "</td>" .
5475               "</tr>\n";
5476
5477         foreach my $par (@$parents) {
5478                 print "<tr>" .
5479                       "<td>parent</td>" .
5480                       "<td class=\"sha1\">" .
5481                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5482                                class => "list"}, $par) .
5483                       "</td>" .
5484                       "<td class=\"link\">" .
5485                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5486                       " | " .
5487                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5488                       "</td>" .
5489                       "</tr>\n";
5490         }
5491         print "</table>".
5492               "</div>\n";
5493
5494         print "<div class=\"page_body\">\n";
5495         git_print_log($co{'comment'});
5496         print "</div>\n";
5497
5498         git_difftree_body(\@difftree, $hash, @$parents);
5499
5500         git_footer_html();
5501 }
5502
5503 sub git_object {
5504         # object is defined by:
5505         # - hash or hash_base alone
5506         # - hash_base and file_name
5507         my $type;
5508
5509         # - hash or hash_base alone
5510         if ($hash || ($hash_base && !defined $file_name)) {
5511                 my $object_id = $hash || $hash_base;
5512
5513                 open my $fd, "-|", quote_command(
5514                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5515                         or die_error(404, "Object does not exist");
5516                 $type = <$fd>;
5517                 chomp $type;
5518                 close $fd
5519                         or die_error(404, "Object does not exist");
5520
5521         # - hash_base and file_name
5522         } elsif ($hash_base && defined $file_name) {
5523                 $file_name =~ s,/+$,,;
5524
5525                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5526                         or die_error(404, "Base object does not exist");
5527
5528                 # here errors should not hapen
5529                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5530                         or die_error(500, "Open git-ls-tree failed");
5531                 my $line = <$fd>;
5532                 close $fd;
5533
5534                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5535                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5536                         die_error(404, "File or directory for given base does not exist");
5537                 }
5538                 $type = $2;
5539                 $hash = $3;
5540         } else {
5541                 die_error(400, "Not enough information to find object");
5542         }
5543
5544         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5545                                           hash=>$hash, hash_base=>$hash_base,
5546                                           file_name=>$file_name),
5547                              -status => '302 Found');
5548 }
5549
5550 sub git_blobdiff {
5551         my $format = shift || 'html';
5552
5553         my $fd;
5554         my @difftree;
5555         my %diffinfo;
5556         my $expires;
5557
5558         # preparing $fd and %diffinfo for git_patchset_body
5559         # new style URI
5560         if (defined $hash_base && defined $hash_parent_base) {
5561                 if (defined $file_name) {
5562                         # read raw output
5563                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5564                                 $hash_parent_base, $hash_base,
5565                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5566                                 or die_error(500, "Open git-diff-tree failed");
5567                         @difftree = map { chomp; $_ } <$fd>;
5568                         close $fd
5569                                 or die_error(404, "Reading git-diff-tree failed");
5570                         @difftree
5571                                 or die_error(404, "Blob diff not found");
5572
5573                 } elsif (defined $hash &&
5574                          $hash =~ /[0-9a-fA-F]{40}/) {
5575                         # try to find filename from $hash
5576
5577                         # read filtered raw output
5578                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5579                                 $hash_parent_base, $hash_base, "--"
5580                                 or die_error(500, "Open git-diff-tree failed");
5581                         @difftree =
5582                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5583                                 # $hash == to_id
5584                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5585                                 map { chomp; $_ } <$fd>;
5586                         close $fd
5587                                 or die_error(404, "Reading git-diff-tree failed");
5588                         @difftree
5589                                 or die_error(404, "Blob diff not found");
5590
5591                 } else {
5592                         die_error(400, "Missing one of the blob diff parameters");
5593                 }
5594
5595                 if (@difftree > 1) {
5596                         die_error(400, "Ambiguous blob diff specification");
5597                 }
5598
5599                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5600                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5601                 $file_name   ||= $diffinfo{'to_file'};
5602
5603                 $hash_parent ||= $diffinfo{'from_id'};
5604                 $hash        ||= $diffinfo{'to_id'};
5605
5606                 # non-textual hash id's can be cached
5607                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5608                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5609                         $expires = '+1d';
5610                 }
5611
5612                 # open patch output
5613                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5614                         '-p', ($format eq 'html' ? "--full-index" : ()),
5615                         $hash_parent_base, $hash_base,
5616                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5617                         or die_error(500, "Open git-diff-tree failed");
5618         }
5619
5620         # old/legacy style URI -- not generated anymore since 1.4.3.
5621         if (!%diffinfo) {
5622                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5623         }
5624
5625         # header
5626         if ($format eq 'html') {
5627                 my $formats_nav =
5628                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5629                                 "raw");
5630                 git_header_html(undef, $expires);
5631                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5632                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5633                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5634                 } else {
5635                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5636                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5637                 }
5638                 if (defined $file_name) {
5639                         git_print_page_path($file_name, "blob", $hash_base);
5640                 } else {
5641                         print "<div class=\"page_path\"></div>\n";
5642                 }
5643
5644         } elsif ($format eq 'plain') {
5645                 print $cgi->header(
5646                         -type => 'text/plain',
5647                         -charset => 'utf-8',
5648                         -expires => $expires,
5649                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5650
5651                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5652
5653         } else {
5654                 die_error(400, "Unknown blobdiff format");
5655         }
5656
5657         # patch
5658         if ($format eq 'html') {
5659                 print "<div class=\"page_body\">\n";
5660
5661                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5662                 close $fd;
5663
5664                 print "</div>\n"; # class="page_body"
5665                 git_footer_html();
5666
5667         } else {
5668                 while (my $line = <$fd>) {
5669                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5670                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5671
5672                         print $line;
5673
5674                         last if $line =~ m!^\+\+\+!;
5675                 }
5676                 local $/ = undef;
5677                 print <$fd>;
5678                 close $fd;
5679         }
5680 }
5681
5682 sub git_blobdiff_plain {
5683         git_blobdiff('plain');
5684 }
5685
5686 sub git_commitdiff {
5687         my %params = @_;
5688         my $format = $params{-format} || 'html';
5689
5690         my ($patch_max) = gitweb_get_feature('patches');
5691         if ($format eq 'patch') {
5692                 die_error(403, "Patch view not allowed") unless $patch_max;
5693         }
5694
5695         $hash ||= $hash_base || "HEAD";
5696         my %co = parse_commit($hash)
5697             or die_error(404, "Unknown commit object");
5698
5699         # choose format for commitdiff for merge
5700         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5701                 $hash_parent = '--cc';
5702         }
5703         # we need to prepare $formats_nav before almost any parameter munging
5704         my $formats_nav;
5705         if ($format eq 'html') {
5706                 $formats_nav =
5707                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5708                                 "raw");
5709                 if ($patch_max && @{$co{'parents'}} <= 1) {
5710                         $formats_nav .= " | " .
5711                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5712                                         "patch");
5713                 }
5714
5715                 if (defined $hash_parent &&
5716                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5717                         # commitdiff with two commits given
5718                         my $hash_parent_short = $hash_parent;
5719                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5720                                 $hash_parent_short = substr($hash_parent, 0, 7);
5721                         }
5722                         $formats_nav .=
5723                                 ' (from';
5724                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5725                                 if ($co{'parents'}[$i] eq $hash_parent) {
5726                                         $formats_nav .= ' parent ' . ($i+1);
5727                                         last;
5728                                 }
5729                         }
5730                         $formats_nav .= ': ' .
5731                                 $cgi->a({-href => href(action=>"commitdiff",
5732                                                        hash=>$hash_parent)},
5733                                         esc_html($hash_parent_short)) .
5734                                 ')';
5735                 } elsif (!$co{'parent'}) {
5736                         # --root commitdiff
5737                         $formats_nav .= ' (initial)';
5738                 } elsif (scalar @{$co{'parents'}} == 1) {
5739                         # single parent commit
5740                         $formats_nav .=
5741                                 ' (parent: ' .
5742                                 $cgi->a({-href => href(action=>"commitdiff",
5743                                                        hash=>$co{'parent'})},
5744                                         esc_html(substr($co{'parent'}, 0, 7))) .
5745                                 ')';
5746                 } else {
5747                         # merge commit
5748                         if ($hash_parent eq '--cc') {
5749                                 $formats_nav .= ' | ' .
5750                                         $cgi->a({-href => href(action=>"commitdiff",
5751                                                                hash=>$hash, hash_parent=>'-c')},
5752                                                 'combined');
5753                         } else { # $hash_parent eq '-c'
5754                                 $formats_nav .= ' | ' .
5755                                         $cgi->a({-href => href(action=>"commitdiff",
5756                                                                hash=>$hash, hash_parent=>'--cc')},
5757                                                 'compact');
5758                         }
5759                         $formats_nav .=
5760                                 ' (merge: ' .
5761                                 join(' ', map {
5762                                         $cgi->a({-href => href(action=>"commitdiff",
5763                                                                hash=>$_)},
5764                                                 esc_html(substr($_, 0, 7)));
5765                                 } @{$co{'parents'}} ) .
5766                                 ')';
5767                 }
5768         }
5769
5770         my $hash_parent_param = $hash_parent;
5771         if (!defined $hash_parent_param) {
5772                 # --cc for multiple parents, --root for parentless
5773                 $hash_parent_param =
5774                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5775         }
5776
5777         # read commitdiff
5778         my $fd;
5779         my @difftree;
5780         if ($format eq 'html') {
5781                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5782                         "--no-commit-id", "--patch-with-raw", "--full-index",
5783                         $hash_parent_param, $hash, "--"
5784                         or die_error(500, "Open git-diff-tree failed");
5785
5786                 while (my $line = <$fd>) {
5787                         chomp $line;
5788                         # empty line ends raw part of diff-tree output
5789                         last unless $line;
5790                         push @difftree, scalar parse_difftree_raw_line($line);
5791                 }
5792
5793         } elsif ($format eq 'plain') {
5794                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5795                         '-p', $hash_parent_param, $hash, "--"
5796                         or die_error(500, "Open git-diff-tree failed");
5797         } elsif ($format eq 'patch') {
5798                 # For commit ranges, we limit the output to the number of
5799                 # patches specified in the 'patches' feature.
5800                 # For single commits, we limit the output to a single patch,
5801                 # diverging from the git-format-patch default.
5802                 my @commit_spec = ();
5803                 if ($hash_parent) {
5804                         if ($patch_max > 0) {
5805                                 push @commit_spec, "-$patch_max";
5806                         }
5807                         push @commit_spec, '-n', "$hash_parent..$hash";
5808                 } else {
5809                         if ($params{-single}) {
5810                                 push @commit_spec, '-1';
5811                         } else {
5812                                 if ($patch_max > 0) {
5813                                         push @commit_spec, "-$patch_max";
5814                                 }
5815                                 push @commit_spec, "-n";
5816                         }
5817                         push @commit_spec, '--root', $hash;
5818                 }
5819                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5820                         '--stdout', @commit_spec
5821                         or die_error(500, "Open git-format-patch failed");
5822         } else {
5823                 die_error(400, "Unknown commitdiff format");
5824         }
5825
5826         # non-textual hash id's can be cached
5827         my $expires;
5828         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5829                 $expires = "+1d";
5830         }
5831
5832         # write commit message
5833         if ($format eq 'html') {
5834                 my $refs = git_get_references();
5835                 my $ref = format_ref_marker($refs, $co{'id'});
5836
5837                 git_header_html(undef, $expires);
5838                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5839                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5840                 print "<div class=\"title_text\">\n" .
5841                       "<table class=\"object_header\">\n";
5842                 git_print_authorship_rows(\%co);
5843                 print "</table>".
5844                       "</div>\n";
5845                 print "<div class=\"page_body\">\n";
5846                 if (@{$co{'comment'}} > 1) {
5847                         print "<div class=\"log\">\n";
5848                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5849                         print "</div>\n"; # class="log"
5850                 }
5851
5852         } elsif ($format eq 'plain') {
5853                 my $refs = git_get_references("tags");
5854                 my $tagname = git_get_rev_name_tags($hash);
5855                 my $filename = basename($project) . "-$hash.patch";
5856
5857                 print $cgi->header(
5858                         -type => 'text/plain',
5859                         -charset => 'utf-8',
5860                         -expires => $expires,
5861                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5862                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5863                 print "From: " . to_utf8($co{'author'}) . "\n";
5864                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5865                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5866
5867                 print "X-Git-Tag: $tagname\n" if $tagname;
5868                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5869
5870                 foreach my $line (@{$co{'comment'}}) {
5871                         print to_utf8($line) . "\n";
5872                 }
5873                 print "---\n\n";
5874         } elsif ($format eq 'patch') {
5875                 my $filename = basename($project) . "-$hash.patch";
5876
5877                 print $cgi->header(
5878                         -type => 'text/plain',
5879                         -charset => 'utf-8',
5880                         -expires => $expires,
5881                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5882         }
5883
5884         # write patch
5885         if ($format eq 'html') {
5886                 my $use_parents = !defined $hash_parent ||
5887                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5888                 git_difftree_body(\@difftree, $hash,
5889                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5890                 print "<br/>\n";
5891
5892                 git_patchset_body($fd, \@difftree, $hash,
5893                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5894                 close $fd;
5895                 print "</div>\n"; # class="page_body"
5896                 git_footer_html();
5897
5898         } elsif ($format eq 'plain') {
5899                 local $/ = undef;
5900                 print <$fd>;
5901                 close $fd
5902                         or print "Reading git-diff-tree failed\n";
5903         } elsif ($format eq 'patch') {
5904                 local $/ = undef;
5905                 print <$fd>;
5906                 close $fd
5907                         or print "Reading git-format-patch failed\n";
5908         }
5909 }
5910
5911 sub git_commitdiff_plain {
5912         git_commitdiff(-format => 'plain');
5913 }
5914
5915 # format-patch-style patches
5916 sub git_patch {
5917         git_commitdiff(-format => 'patch', -single => 1);
5918 }
5919
5920 sub git_patches {
5921         git_commitdiff(-format => 'patch');
5922 }
5923
5924 sub git_history {
5925         if (!defined $hash_base) {
5926                 $hash_base = git_get_head_hash($project);
5927         }
5928         if (!defined $page) {
5929                 $page = 0;
5930         }
5931         my $ftype;
5932         my %co = parse_commit($hash_base)
5933             or die_error(404, "Unknown commit object");
5934
5935         my $refs = git_get_references();
5936         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5937
5938         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5939                                        $file_name, "--full-history")
5940             or die_error(404, "No such file or directory on given branch");
5941
5942         if (!defined $hash && defined $file_name) {
5943                 # some commits could have deleted file in question,
5944                 # and not have it in tree, but one of them has to have it
5945                 for (my $i = 0; $i <= @commitlist; $i++) {
5946                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5947                         last if defined $hash;
5948                 }
5949         }
5950         if (defined $hash) {
5951                 $ftype = git_get_type($hash);
5952         }
5953         if (!defined $ftype) {
5954                 die_error(500, "Unknown type of object");
5955         }
5956
5957         my $paging_nav = '';
5958         if ($page > 0) {
5959                 $paging_nav .=
5960                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5961                                                file_name=>$file_name)},
5962                                 "first");
5963                 $paging_nav .= " &sdot; " .
5964                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5965                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5966         } else {
5967                 $paging_nav .= "first";
5968                 $paging_nav .= " &sdot; prev";
5969         }
5970         my $next_link = '';
5971         if ($#commitlist >= 100) {
5972                 $next_link =
5973                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5974                                  -accesskey => "n", -title => "Alt-n"}, "next");
5975                 $paging_nav .= " &sdot; $next_link";
5976         } else {
5977                 $paging_nav .= " &sdot; next";
5978         }
5979
5980         git_header_html();
5981         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5982         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5983         git_print_page_path($file_name, $ftype, $hash_base);
5984
5985         git_history_body(\@commitlist, 0, 99,
5986                          $refs, $hash_base, $ftype, $next_link);
5987
5988         git_footer_html();
5989 }
5990
5991 sub git_search {
5992         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5993         if (!defined $searchtext) {
5994                 die_error(400, "Text field is empty");
5995         }
5996         if (!defined $hash) {
5997                 $hash = git_get_head_hash($project);
5998         }
5999         my %co = parse_commit($hash);
6000         if (!%co) {
6001                 die_error(404, "Unknown commit object");
6002         }
6003         if (!defined $page) {
6004                 $page = 0;
6005         }
6006
6007         $searchtype ||= 'commit';
6008         if ($searchtype eq 'pickaxe') {
6009                 # pickaxe may take all resources of your box and run for several minutes
6010                 # with every query - so decide by yourself how public you make this feature
6011                 gitweb_check_feature('pickaxe')
6012                     or die_error(403, "Pickaxe is disabled");
6013         }
6014         if ($searchtype eq 'grep') {
6015                 gitweb_check_feature('grep')
6016                     or die_error(403, "Grep is disabled");
6017         }
6018
6019         git_header_html();
6020
6021         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6022                 my $greptype;
6023                 if ($searchtype eq 'commit') {
6024                         $greptype = "--grep=";
6025                 } elsif ($searchtype eq 'author') {
6026                         $greptype = "--author=";
6027                 } elsif ($searchtype eq 'committer') {
6028                         $greptype = "--committer=";
6029                 }
6030                 $greptype .= $searchtext;
6031                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6032                                                $greptype, '--regexp-ignore-case',
6033                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6034
6035                 my $paging_nav = '';
6036                 if ($page > 0) {
6037                         $paging_nav .=
6038                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6039                                                        searchtext=>$searchtext,
6040                                                        searchtype=>$searchtype)},
6041                                         "first");
6042                         $paging_nav .= " &sdot; " .
6043                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6044                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6045                 } else {
6046                         $paging_nav .= "first";
6047                         $paging_nav .= " &sdot; prev";
6048                 }
6049                 my $next_link = '';
6050                 if ($#commitlist >= 100) {
6051                         $next_link =
6052                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6053                                          -accesskey => "n", -title => "Alt-n"}, "next");
6054                         $paging_nav .= " &sdot; $next_link";
6055                 } else {
6056                         $paging_nav .= " &sdot; next";
6057                 }
6058
6059                 if ($#commitlist >= 100) {
6060                 }
6061
6062                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6063                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6064                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6065         }
6066
6067         if ($searchtype eq 'pickaxe') {
6068                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6069                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6070
6071                 print "<table class=\"pickaxe search\">\n";
6072                 my $alternate = 1;
6073                 local $/ = "\n";
6074                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6075                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6076                         ($search_use_regexp ? '--pickaxe-regex' : ());
6077                 undef %co;
6078                 my @files;
6079                 while (my $line = <$fd>) {
6080                         chomp $line;
6081                         next unless $line;
6082
6083                         my %set = parse_difftree_raw_line($line);
6084                         if (defined $set{'commit'}) {
6085                                 # finish previous commit
6086                                 if (%co) {
6087                                         print "</td>\n" .
6088                                               "<td class=\"link\">" .
6089                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6090                                               " | " .
6091                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6092                                         print "</td>\n" .
6093                                               "</tr>\n";
6094                                 }
6095
6096                                 if ($alternate) {
6097                                         print "<tr class=\"dark\">\n";
6098                                 } else {
6099                                         print "<tr class=\"light\">\n";
6100                                 }
6101                                 $alternate ^= 1;
6102                                 %co = parse_commit($set{'commit'});
6103                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6104                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6105                                       "<td><i>$author</i></td>\n" .
6106                                       "<td>" .
6107                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6108                                               -class => "list subject"},
6109                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6110                         } elsif (defined $set{'to_id'}) {
6111                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6112
6113                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6114                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6115                                               -class => "list"},
6116                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6117                                       "<br/>\n";
6118                         }
6119                 }
6120                 close $fd;
6121
6122                 # finish last commit (warning: repetition!)
6123                 if (%co) {
6124                         print "</td>\n" .
6125                               "<td class=\"link\">" .
6126                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6127                               " | " .
6128                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6129                         print "</td>\n" .
6130                               "</tr>\n";
6131                 }
6132
6133                 print "</table>\n";
6134         }
6135
6136         if ($searchtype eq 'grep') {
6137                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6138                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6139
6140                 print "<table class=\"grep_search\">\n";
6141                 my $alternate = 1;
6142                 my $matches = 0;
6143                 local $/ = "\n";
6144                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6145                         $search_use_regexp ? ('-E', '-i') : '-F',
6146                         $searchtext, $co{'tree'};
6147                 my $lastfile = '';
6148                 while (my $line = <$fd>) {
6149                         chomp $line;
6150                         my ($file, $lno, $ltext, $binary);
6151                         last if ($matches++ > 1000);
6152                         if ($line =~ /^Binary file (.+) matches$/) {
6153                                 $file = $1;
6154                                 $binary = 1;
6155                         } else {
6156                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6157                         }
6158                         if ($file ne $lastfile) {
6159                                 $lastfile and print "</td></tr>\n";
6160                                 if ($alternate++) {
6161                                         print "<tr class=\"dark\">\n";
6162                                 } else {
6163                                         print "<tr class=\"light\">\n";
6164                                 }
6165                                 print "<td class=\"list\">".
6166                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6167                                                                file_name=>"$file"),
6168                                                 -class => "list"}, esc_path($file));
6169                                 print "</td><td>\n";
6170                                 $lastfile = $file;
6171                         }
6172                         if ($binary) {
6173                                 print "<div class=\"binary\">Binary file</div>\n";
6174                         } else {
6175                                 $ltext = untabify($ltext);
6176                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6177                                         $ltext = esc_html($1, -nbsp=>1);
6178                                         $ltext .= '<span class="match">';
6179                                         $ltext .= esc_html($2, -nbsp=>1);
6180                                         $ltext .= '</span>';
6181                                         $ltext .= esc_html($3, -nbsp=>1);
6182                                 } else {
6183                                         $ltext = esc_html($ltext, -nbsp=>1);
6184                                 }
6185                                 print "<div class=\"pre\">" .
6186                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6187                                                                file_name=>"$file").'#l'.$lno,
6188                                                 -class => "linenr"}, sprintf('%4i', $lno))
6189                                         . ' ' .  $ltext . "</div>\n";
6190                         }
6191                 }
6192                 if ($lastfile) {
6193                         print "</td></tr>\n";
6194                         if ($matches > 1000) {
6195                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6196                         }
6197                 } else {
6198                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6199                 }
6200                 close $fd;
6201
6202                 print "</table>\n";
6203         }
6204         git_footer_html();
6205 }
6206
6207 sub git_search_help {
6208         git_header_html();
6209         git_print_page_nav('','', $hash,$hash,$hash);
6210         print <<EOT;
6211 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6212 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6213 the pattern entered is recognized as the POSIX extended
6214 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6215 insensitive).</p>
6216 <dl>
6217 <dt><b>commit</b></dt>
6218 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6219 EOT
6220         my $have_grep = gitweb_check_feature('grep');
6221         if ($have_grep) {
6222                 print <<EOT;
6223 <dt><b>grep</b></dt>
6224 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6225     a different one) are searched for the given pattern. On large trees, this search can take
6226 a while and put some strain on the server, so please use it with some consideration. Note that
6227 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6228 case-sensitive.</dd>
6229 EOT
6230         }
6231         print <<EOT;
6232 <dt><b>author</b></dt>
6233 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6234 <dt><b>committer</b></dt>
6235 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6236 EOT
6237         my $have_pickaxe = gitweb_check_feature('pickaxe');
6238         if ($have_pickaxe) {
6239                 print <<EOT;
6240 <dt><b>pickaxe</b></dt>
6241 <dd>All commits that caused the string to appear or disappear from any file (changes that
6242 added, removed or "modified" the string) will be listed. This search can take a while and
6243 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6244 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6245 EOT
6246         }
6247         print "</dl>\n";
6248         git_footer_html();
6249 }
6250
6251 sub git_shortlog {
6252         my $head = git_get_head_hash($project);
6253         if (!defined $hash) {
6254                 $hash = $head;
6255         }
6256         if (!defined $page) {
6257                 $page = 0;
6258         }
6259         my $refs = git_get_references();
6260
6261         my $commit_hash = $hash;
6262         if (defined $hash_parent) {
6263                 $commit_hash = "$hash_parent..$hash";
6264         }
6265         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6266
6267         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6268         my $next_link = '';
6269         if ($#commitlist >= 100) {
6270                 $next_link =
6271                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6272                                  -accesskey => "n", -title => "Alt-n"}, "next");
6273         }
6274         my $patch_max = gitweb_check_feature('patches');
6275         if ($patch_max) {
6276                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6277                         $paging_nav .= " &sdot; " .
6278                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6279                                         "patches");
6280                 }
6281         }
6282
6283         git_header_html();
6284         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6285         git_print_header_div('summary', $project);
6286
6287         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6288
6289         git_footer_html();
6290 }
6291
6292 ## ......................................................................
6293 ## feeds (RSS, Atom; OPML)
6294
6295 sub git_feed {
6296         my $format = shift || 'atom';
6297         my $have_blame = gitweb_check_feature('blame');
6298
6299         # Atom: http://www.atomenabled.org/developers/syndication/
6300         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6301         if ($format ne 'rss' && $format ne 'atom') {
6302                 die_error(400, "Unknown web feed format");
6303         }
6304
6305         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6306         my $head = $hash || 'HEAD';
6307         my @commitlist = parse_commits($head, 150, 0, $file_name);
6308
6309         my %latest_commit;
6310         my %latest_date;
6311         my $content_type = "application/$format+xml";
6312         if (defined $cgi->http('HTTP_ACCEPT') &&
6313                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6314                 # browser (feed reader) prefers text/xml
6315                 $content_type = 'text/xml';
6316         }
6317         if (defined($commitlist[0])) {
6318                 %latest_commit = %{$commitlist[0]};
6319                 my $latest_epoch = $latest_commit{'committer_epoch'};
6320                 %latest_date   = parse_date($latest_epoch);
6321                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6322                 if (defined $if_modified) {
6323                         my $since;
6324                         if (eval { require HTTP::Date; 1; }) {
6325                                 $since = HTTP::Date::str2time($if_modified);
6326                         } elsif (eval { require Time::ParseDate; 1; }) {
6327                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6328                         }
6329                         if (defined $since && $latest_epoch <= $since) {
6330                                 print $cgi->header(
6331                                         -type => $content_type,
6332                                         -charset => 'utf-8',
6333                                         -last_modified => $latest_date{'rfc2822'},
6334                                         -status => '304 Not Modified');
6335                                 return;
6336                         }
6337                 }
6338                 print $cgi->header(
6339                         -type => $content_type,
6340                         -charset => 'utf-8',
6341                         -last_modified => $latest_date{'rfc2822'});
6342         } else {
6343                 print $cgi->header(
6344                         -type => $content_type,
6345                         -charset => 'utf-8');
6346         }
6347
6348         # Optimization: skip generating the body if client asks only
6349         # for Last-Modified date.
6350         return if ($cgi->request_method() eq 'HEAD');
6351
6352         # header variables
6353         my $title = "$site_name - $project/$action";
6354         my $feed_type = 'log';
6355         if (defined $hash) {
6356                 $title .= " - '$hash'";
6357                 $feed_type = 'branch log';
6358                 if (defined $file_name) {
6359                         $title .= " :: $file_name";
6360                         $feed_type = 'history';
6361                 }
6362         } elsif (defined $file_name) {
6363                 $title .= " - $file_name";
6364                 $feed_type = 'history';
6365         }
6366         $title .= " $feed_type";
6367         my $descr = git_get_project_description($project);
6368         if (defined $descr) {
6369                 $descr = esc_html($descr);
6370         } else {
6371                 $descr = "$project " .
6372                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6373                          " feed";
6374         }
6375         my $owner = git_get_project_owner($project);
6376         $owner = esc_html($owner);
6377
6378         #header
6379         my $alt_url;
6380         if (defined $file_name) {
6381                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6382         } elsif (defined $hash) {
6383                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6384         } else {
6385                 $alt_url = href(-full=>1, action=>"summary");
6386         }
6387         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6388         if ($format eq 'rss') {
6389                 print <<XML;
6390 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6391 <channel>
6392 XML
6393                 print "<title>$title</title>\n" .
6394                       "<link>$alt_url</link>\n" .
6395                       "<description>$descr</description>\n" .
6396                       "<language>en</language>\n" .
6397                       # project owner is responsible for 'editorial' content
6398                       "<managingEditor>$owner</managingEditor>\n";
6399                 if (defined $logo || defined $favicon) {
6400                         # prefer the logo to the favicon, since RSS
6401                         # doesn't allow both
6402                         my $img = esc_url($logo || $favicon);
6403                         print "<image>\n" .
6404                               "<url>$img</url>\n" .
6405                               "<title>$title</title>\n" .
6406                               "<link>$alt_url</link>\n" .
6407                               "</image>\n";
6408                 }
6409                 if (%latest_date) {
6410                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6411                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6412                 }
6413                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6414         } elsif ($format eq 'atom') {
6415                 print <<XML;
6416 <feed xmlns="http://www.w3.org/2005/Atom">
6417 XML
6418                 print "<title>$title</title>\n" .
6419                       "<subtitle>$descr</subtitle>\n" .
6420                       '<link rel="alternate" type="text/html" href="' .
6421                       $alt_url . '" />' . "\n" .
6422                       '<link rel="self" type="' . $content_type . '" href="' .
6423                       $cgi->self_url() . '" />' . "\n" .
6424                       "<id>" . href(-full=>1) . "</id>\n" .
6425                       # use project owner for feed author
6426                       "<author><name>$owner</name></author>\n";
6427                 if (defined $favicon) {
6428                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6429                 }
6430                 if (defined $logo_url) {
6431                         # not twice as wide as tall: 72 x 27 pixels
6432                         print "<logo>" . esc_url($logo) . "</logo>\n";
6433                 }
6434                 if (! %latest_date) {
6435                         # dummy date to keep the feed valid until commits trickle in:
6436                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6437                 } else {
6438                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6439                 }
6440                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6441         }
6442
6443         # contents
6444         for (my $i = 0; $i <= $#commitlist; $i++) {
6445                 my %co = %{$commitlist[$i]};
6446                 my $commit = $co{'id'};
6447                 # we read 150, we always show 30 and the ones more recent than 48 hours
6448                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6449                         last;
6450                 }
6451                 my %cd = parse_date($co{'author_epoch'});
6452
6453                 # get list of changed files
6454                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6455                         $co{'parent'} || "--root",
6456                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6457                         or next;
6458                 my @difftree = map { chomp; $_ } <$fd>;
6459                 close $fd
6460                         or next;
6461
6462                 # print element (entry, item)
6463                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6464                 if ($format eq 'rss') {
6465                         print "<item>\n" .
6466                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6467                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6468                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6469                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6470                               "<link>$co_url</link>\n" .
6471                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6472                               "<content:encoded>" .
6473                               "<![CDATA[\n";
6474                 } elsif ($format eq 'atom') {
6475                         print "<entry>\n" .
6476                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6477                               "<updated>$cd{'iso-8601'}</updated>\n" .
6478                               "<author>\n" .
6479                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6480                         if ($co{'author_email'}) {
6481                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6482                         }
6483                         print "</author>\n" .
6484                               # use committer for contributor
6485                               "<contributor>\n" .
6486                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6487                         if ($co{'committer_email'}) {
6488                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6489                         }
6490                         print "</contributor>\n" .
6491                               "<published>$cd{'iso-8601'}</published>\n" .
6492                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6493                               "<id>$co_url</id>\n" .
6494                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6495                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6496                 }
6497                 my $comment = $co{'comment'};
6498                 print "<pre>\n";
6499                 foreach my $line (@$comment) {
6500                         $line = esc_html($line);
6501                         print "$line\n";
6502                 }
6503                 print "</pre><ul>\n";
6504                 foreach my $difftree_line (@difftree) {
6505                         my %difftree = parse_difftree_raw_line($difftree_line);
6506                         next if !$difftree{'from_id'};
6507
6508                         my $file = $difftree{'file'} || $difftree{'to_file'};
6509
6510                         print "<li>" .
6511                               "[" .
6512                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6513                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6514                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6515                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6516                                       -title => "diff"}, 'D');
6517                         if ($have_blame) {
6518                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6519                                                              file_name=>$file, hash_base=>$commit),
6520                                               -title => "blame"}, 'B');
6521                         }
6522                         # if this is not a feed of a file history
6523                         if (!defined $file_name || $file_name ne $file) {
6524                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6525                                                              file_name=>$file, hash=>$commit),
6526                                               -title => "history"}, 'H');
6527                         }
6528                         $file = esc_path($file);
6529                         print "] ".
6530                               "$file</li>\n";
6531                 }
6532                 if ($format eq 'rss') {
6533                         print "</ul>]]>\n" .
6534                               "</content:encoded>\n" .
6535                               "</item>\n";
6536                 } elsif ($format eq 'atom') {
6537                         print "</ul>\n</div>\n" .
6538                               "</content>\n" .
6539                               "</entry>\n";
6540                 }
6541         }
6542
6543         # end of feed
6544         if ($format eq 'rss') {
6545                 print "</channel>\n</rss>\n";
6546         } elsif ($format eq 'atom') {
6547                 print "</feed>\n";
6548         }
6549 }
6550
6551 sub git_rss {
6552         git_feed('rss');
6553 }
6554
6555 sub git_atom {
6556         git_feed('atom');
6557 }
6558
6559 sub git_opml {
6560         my @list = git_get_projects_list();
6561
6562         print $cgi->header(
6563                 -type => 'text/xml',
6564                 -charset => 'utf-8',
6565                 -content_disposition => 'inline; filename="opml.xml"');
6566
6567         print <<XML;
6568 <?xml version="1.0" encoding="utf-8"?>
6569 <opml version="1.0">
6570 <head>
6571   <title>$site_name OPML Export</title>
6572 </head>
6573 <body>
6574 <outline text="git RSS feeds">
6575 XML
6576
6577         foreach my $pr (@list) {
6578                 my %proj = %$pr;
6579                 my $head = git_get_head_hash($proj{'path'});
6580                 if (!defined $head) {
6581                         next;
6582                 }
6583                 $git_dir = "$projectroot/$proj{'path'}";
6584                 my %co = parse_commit($head);
6585                 if (!%co) {
6586                         next;
6587                 }
6588
6589                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6590                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6591                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6592                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6593         }
6594         print <<XML;
6595 </outline>
6596 </body>
6597 </opml>
6598 XML
6599 }