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         'zip' => {
 181                 'display' => 'zip',
 182                 'type' => 'application/x-zip',
 183                 'suffix' => '.zip',
 184                 'format' => 'zip'},
 185 );
 186
 187 # Aliases so we understand old gitweb.snapshot values in repository
 188 # configuration.
 189 our %known_snapshot_format_aliases = (
 190         'gzip'  => 'tgz',
 191         'bzip2' => 'tbz2',
 192
 193         # backward compatibility: legacy gitweb config support
 194         'x-gzip' => undef, 'gz' => undef,
 195         'x-bzip2' => undef, 'bz2' => undef,
 196         'x-zip' => undef, '' => undef,
 197 );
 198
 199 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 200 # are changed, it may be appropriate to change these values too via
 201 # $GITWEB_CONFIG.
 202 our %avatar_size = (
 203         'default' => 16,
 204         'double'  => 32
 205 );
 206
 207 # You define site-wide feature defaults here; override them with
 208 # $GITWEB_CONFIG as necessary.
 209 our %feature = (
 210         # feature => {
 211         #       'sub' => feature-sub (subroutine),
 212         #       'override' => allow-override (boolean),
 213         #       'default' => [ default options...] (array reference)}
 214         #
 215         # if feature is overridable (it means that allow-override has true value),
 216         # then feature-sub will be called with default options as parameters;
 217         # return value of feature-sub indicates if to enable specified feature
 218         #
 219         # if there is no 'sub' key (no feature-sub), then feature cannot be
 220         # overriden
 221         #
 222         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 223         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 224         # is enabled
 225
 226         # Enable the 'blame' blob view, showing the last commit that modified
 227         # each line in the file. This can be very CPU-intensive.
 228
 229         # To enable system wide have in $GITWEB_CONFIG
 230         # $feature{'blame'}{'default'} = [1];
 231         # To have project specific config enable override in $GITWEB_CONFIG
 232         # $feature{'blame'}{'override'} = 1;
 233         # and in project config gitweb.blame = 0|1;
 234         'blame' => {
 235                 'sub' => sub { feature_bool('blame', @_) },
 236                 'override' => 0,
 237                 'default' => [0]},
 238
 239         # Enable the 'snapshot' link, providing a compressed archive of any
 240         # tree. This can potentially generate high traffic if you have large
 241         # project.
 242
 243         # Value is a list of formats defined in %known_snapshot_formats that
 244         # you wish to offer.
 245         # To disable system wide have in $GITWEB_CONFIG
 246         # $feature{'snapshot'}{'default'} = [];
 247         # To have project specific config enable override in $GITWEB_CONFIG
 248         # $feature{'snapshot'}{'override'} = 1;
 249         # and in project config, a comma-separated list of formats or "none"
 250         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 251         'snapshot' => {
 252                 'sub' => \&feature_snapshot,
 253                 'override' => 0,
 254                 'default' => ['tgz']},
 255
 256         # Enable text search, which will list the commits which match author,
 257         # committer or commit text to a given string.  Enabled by default.
 258         # Project specific override is not supported.
 259         'search' => {
 260                 'override' => 0,
 261                 'default' => [1]},
 262
 263         # Enable grep search, which will list the files in currently selected
 264         # tree containing the given string. Enabled by default. This can be
 265         # potentially CPU-intensive, of course.
 266
 267         # To enable system wide have in $GITWEB_CONFIG
 268         # $feature{'grep'}{'default'} = [1];
 269         # To have project specific config enable override in $GITWEB_CONFIG
 270         # $feature{'grep'}{'override'} = 1;
 271         # and in project config gitweb.grep = 0|1;
 272         'grep' => {
 273                 'sub' => sub { feature_bool('grep', @_) },
 274                 'override' => 0,
 275                 'default' => [1]},
 276
 277         # Enable the pickaxe search, which will list the commits that modified
 278         # a given string in a file. This can be practical and quite faster
 279         # alternative to 'blame', but still potentially CPU-intensive.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'pickaxe'}{'default'} = [1];
 283         # To have project specific config enable override in $GITWEB_CONFIG
 284         # $feature{'pickaxe'}{'override'} = 1;
 285         # and in project config gitweb.pickaxe = 0|1;
 286         'pickaxe' => {
 287                 'sub' => sub { feature_bool('pickaxe', @_) },
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Make gitweb use an alternative format of the URLs which can be
 292         # more readable and natural-looking: project name is embedded
 293         # directly in the path and the query string contains other
 294         # auxiliary information. All gitweb installations recognize
 295         # URL in either format; this configures in which formats gitweb
 296         # generates links.
 297
 298         # To enable system wide have in $GITWEB_CONFIG
 299         # $feature{'pathinfo'}{'default'} = [1];
 300         # Project specific override is not supported.
 301
 302         # Note that you will need to change the default location of CSS,
 303         # favicon, logo and possibly other files to an absolute URL. Also,
 304         # if gitweb.cgi serves as your indexfile, you will need to force
 305         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 306         'pathinfo' => {
 307                 'override' => 0,
 308                 'default' => [0]},
 309
 310         # Make gitweb consider projects in project root subdirectories
 311         # to be forks of existing projects. Given project $projname.git,
 312         # projects matching $projname/*.git will not be shown in the main
 313         # projects list, instead a '+' mark will be added to $projname
 314         # there and a 'forks' view will be enabled for the project, listing
 315         # all the forks. If project list is taken from a file, forks have
 316         # to be listed after the main project.
 317
 318         # To enable system wide have in $GITWEB_CONFIG
 319         # $feature{'forks'}{'default'} = [1];
 320         # Project specific override is not supported.
 321         'forks' => {
 322                 'override' => 0,
 323                 'default' => [0]},
 324
 325         # Insert custom links to the action bar of all project pages.
 326         # This enables you mainly to link to third-party scripts integrating
 327         # into gitweb; e.g. git-browser for graphical history representation
 328         # or custom web-based repository administration interface.
 329
 330         # The 'default' value consists of a list of triplets in the form
 331         # (label, link, position) where position is the label after which
 332         # to insert the link and link is a format string where %n expands
 333         # to the project name, %f to the project path within the filesystem,
 334         # %h to the current hash (h gitweb parameter) and %b to the current
 335         # hash base (hb gitweb parameter); %% expands to %.
 336
 337         # To enable system wide have in $GITWEB_CONFIG e.g.
 338         # $feature{'actions'}{'default'} = [('graphiclog',
 339         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 340         # Project specific override is not supported.
 341         'actions' => {
 342                 'override' => 0,
 343                 'default' => []},
 344
 345         # Allow gitweb scan project content tags described in ctags/
 346         # of project repository, and display the popular Web 2.0-ish
 347         # "tag cloud" near the project list. Note that this is something
 348         # COMPLETELY different from the normal Git tags.
 349
 350         # gitweb by itself can show existing tags, but it does not handle
 351         # tagging itself; you need an external application for that.
 352         # For an example script, check Girocco's cgi/tagproj.cgi.
 353         # You may want to install the HTML::TagCloud Perl module to get
 354         # a pretty tag cloud instead of just a list of tags.
 355
 356         # To enable system wide have in $GITWEB_CONFIG
 357         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 358         # Project specific override is not supported.
 359         'ctags' => {
 360                 'override' => 0,
 361                 'default' => [0]},
 362
 363         # The maximum number of patches in a patchset generated in patch
 364         # view. Set this to 0 or undef to disable patch view, or to a
 365         # negative number to remove any limit.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'patches'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'patches'}{'override'} = 1;
 371         # and in project config gitweb.patches = 0|n;
 372         # where n is the maximum number of patches allowed in a patchset.
 373         'patches' => {
 374                 'sub' => \&feature_patches,
 375                 'override' => 0,
 376                 'default' => [16]},
 377
 378         # Avatar support. When this feature is enabled, views such as
 379         # shortlog or commit will display an avatar associated with
 380         # the email of the committer(s) and/or author(s).
 381
 382         # Currently available providers are gravatar and picon.
 383         # If an unknown provider is specified, the feature is disabled.
 384
 385         # Gravatar depends on Digest::MD5.
 386         # Picon currently relies on the indiana.edu database.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'avatar'}{'default'} = ['<provider>'];
 390         # where <provider> is either gravatar or picon.
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'avatar'}{'override'} = 1;
 393         # and in project config gitweb.avatar = <provider>;
 394         'avatar' => {
 395                 'sub' => \&feature_avatar,
 396                 'override' => 0,
 397                 'default' => ['']},
 398 );
 399
 400 sub gitweb_get_feature {
 401         my ($name) = @_;
 402         return unless exists $feature{$name};
 403         my ($sub, $override, @defaults) = (
 404                 $feature{$name}{'sub'},
 405                 $feature{$name}{'override'},
 406                 @{$feature{$name}{'default'}});
 407         if (!$override) { return @defaults; }
 408         if (!defined $sub) {
 409                 warn "feature $name is not overrideable";
 410                 return @defaults;
 411         }
 412         return $sub->(@defaults);
 413 }
 414
 415 # A wrapper to check if a given feature is enabled.
 416 # With this, you can say
 417 #
 418 #   my $bool_feat = gitweb_check_feature('bool_feat');
 419 #   gitweb_check_feature('bool_feat') or somecode;
 420 #
 421 # instead of
 422 #
 423 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 424 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 425 #
 426 sub gitweb_check_feature {
 427         return (gitweb_get_feature(@_))[0];
 428 }
 429
 430
 431 sub feature_bool {
 432         my $key = shift;
 433         my ($val) = git_get_project_config($key, '--bool');
 434
 435         if (!defined $val) {
 436                 return ($_[0]);
 437         } elsif ($val eq 'true') {
 438                 return (1);
 439         } elsif ($val eq 'false') {
 440                 return (0);
 441         }
 442 }
 443
 444 sub feature_snapshot {
 445         my (@fmts) = @_;
 446
 447         my ($val) = git_get_project_config('snapshot');
 448
 449         if ($val) {
 450                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 451         }
 452
 453         return @fmts;
 454 }
 455
 456 sub feature_patches {
 457         my @val = (git_get_project_config('patches', '--int'));
 458
 459         if (@val) {
 460                 return @val;
 461         }
 462
 463         return ($_[0]);
 464 }
 465
 466 sub feature_avatar {
 467         my @val = (git_get_project_config('avatar'));
 468
 469         return @val ? @val : @_;
 470 }
 471
 472 # checking HEAD file with -e is fragile if the repository was
 473 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 474 # and then pruned.
 475 sub check_head_link {
 476         my ($dir) = @_;
 477         my $headfile = "$dir/HEAD";
 478         return ((-e $headfile) ||
 479                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 480 }
 481
 482 sub check_export_ok {
 483         my ($dir) = @_;
 484         return (check_head_link($dir) &&
 485                 (!$export_ok || -e "$dir/$export_ok") &&
 486                 (!$export_auth_hook || $export_auth_hook->($dir)));
 487 }
 488
 489 # process alternate names for backward compatibility
 490 # filter out unsupported (unknown) snapshot formats
 491 sub filter_snapshot_fmts {
 492         my @fmts = @_;
 493
 494         @fmts = map {
 495                 exists $known_snapshot_format_aliases{$_} ?
 496                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 497         @fmts = grep {
 498                 exists $known_snapshot_formats{$_} &&
 499                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 500 }
 501
 502 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 503 if (-e $GITWEB_CONFIG) {
 504         do $GITWEB_CONFIG;
 505 } else {
 506         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 507         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 508 }
 509
 510 # version of the core git binary
 511 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 512
 513 $projects_list ||= $projectroot;
 514
 515 # ======================================================================
 516 # input validation and dispatch
 517
 518 # input parameters can be collected from a variety of sources (presently, CGI
 519 # and PATH_INFO), so we define an %input_params hash that collects them all
 520 # together during validation: this allows subsequent uses (e.g. href()) to be
 521 # agnostic of the parameter origin
 522
 523 our %input_params = ();
 524
 525 # input parameters are stored with the long parameter name as key. This will
 526 # also be used in the href subroutine to convert parameters to their CGI
 527 # equivalent, and since the href() usage is the most frequent one, we store
 528 # the name -> CGI key mapping here, instead of the reverse.
 529 #
 530 # XXX: Warning: If you touch this, check the search form for updating,
 531 # too.
 532
 533 our @cgi_param_mapping = (
 534         project => "p",
 535         action => "a",
 536         file_name => "f",
 537         file_parent => "fp",
 538         hash => "h",
 539         hash_parent => "hp",
 540         hash_base => "hb",
 541         hash_parent_base => "hpb",
 542         page => "pg",
 543         order => "o",
 544         searchtext => "s",
 545         searchtype => "st",
 546         snapshot_format => "sf",
 547         extra_options => "opt",
 548         search_use_regexp => "sr",
 549 );
 550 our %cgi_param_mapping = @cgi_param_mapping;
 551
 552 # we will also need to know the possible actions, for validation
 553 our %actions = (
 554         "blame" => \&git_blame,
 555         "blobdiff" => \&git_blobdiff,
 556         "blobdiff_plain" => \&git_blobdiff_plain,
 557         "blob" => \&git_blob,
 558         "blob_plain" => \&git_blob_plain,
 559         "commitdiff" => \&git_commitdiff,
 560         "commitdiff_plain" => \&git_commitdiff_plain,
 561         "commit" => \&git_commit,
 562         "forks" => \&git_forks,
 563         "heads" => \&git_heads,
 564         "history" => \&git_history,
 565         "log" => \&git_log,
 566         "patch" => \&git_patch,
 567         "patches" => \&git_patches,
 568         "rss" => \&git_rss,
 569         "atom" => \&git_atom,
 570         "search" => \&git_search,
 571         "search_help" => \&git_search_help,
 572         "shortlog" => \&git_shortlog,
 573         "summary" => \&git_summary,
 574         "tag" => \&git_tag,
 575         "tags" => \&git_tags,
 576         "tree" => \&git_tree,
 577         "snapshot" => \&git_snapshot,
 578         "object" => \&git_object,
 579         # those below don't need $project
 580         "opml" => \&git_opml,
 581         "project_list" => \&git_project_list,
 582         "project_index" => \&git_project_index,
 583 );
 584
 585 # finally, we have the hash of allowed extra_options for the commands that
 586 # allow them
 587 our %allowed_options = (
 588         "--no-merges" => [ qw(rss atom log shortlog history) ],
 589 );
 590
 591 # fill %input_params with the CGI parameters. All values except for 'opt'
 592 # should be single values, but opt can be an array. We should probably
 593 # build an array of parameters that can be multi-valued, but since for the time
 594 # being it's only this one, we just single it out
 595 while (my ($name, $symbol) = each %cgi_param_mapping) {
 596         if ($symbol eq 'opt') {
 597                 $input_params{$name} = [ $cgi->param($symbol) ];
 598         } else {
 599                 $input_params{$name} = $cgi->param($symbol);
 600         }
 601 }
 602
 603 # now read PATH_INFO and update the parameter list for missing parameters
 604 sub evaluate_path_info {
 605         return if defined $input_params{'project'};
 606         return if !$path_info;
 607         $path_info =~ s,^/+,,;
 608         return if !$path_info;
 609
 610         # find which part of PATH_INFO is project
 611         my $project = $path_info;
 612         $project =~ s,/+$,,;
 613         while ($project && !check_head_link("$projectroot/$project")) {
 614                 $project =~ s,/*[^/]*$,,;
 615         }
 616         return unless $project;
 617         $input_params{'project'} = $project;
 618
 619         # do not change any parameters if an action is given using the query string
 620         return if $input_params{'action'};
 621         $path_info =~ s,^\Q$project\E/*,,;
 622
 623         # next, check if we have an action
 624         my $action = $path_info;
 625         $action =~ s,/.*$,,;
 626         if (exists $actions{$action}) {
 627                 $path_info =~ s,^$action/*,,;
 628                 $input_params{'action'} = $action;
 629         }
 630
 631         # list of actions that want hash_base instead of hash, but can have no
 632         # pathname (f) parameter
 633         my @wants_base = (
 634                 'tree',
 635                 'history',
 636         );
 637
 638         # we want to catch
 639         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 640         my ($parentrefname, $parentpathname, $refname, $pathname) =
 641                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 642
 643         # first, analyze the 'current' part
 644         if (defined $pathname) {
 645                 # we got "branch:filename" or "branch:dir/"
 646                 # we could use git_get_type(branch:pathname), but:
 647                 # - it needs $git_dir
 648                 # - it does a git() call
 649                 # - the convention of terminating directories with a slash
 650                 #   makes it superfluous
 651                 # - embedding the action in the PATH_INFO would make it even
 652                 #   more superfluous
 653                 $pathname =~ s,^/+,,;
 654                 if (!$pathname || substr($pathname, -1) eq "/") {
 655                         $input_params{'action'} ||= "tree";
 656                         $pathname =~ s,/$,,;
 657                 } else {
 658                         # the default action depends on whether we had parent info
 659                         # or not
 660                         if ($parentrefname) {
 661                                 $input_params{'action'} ||= "blobdiff_plain";
 662                         } else {
 663                                 $input_params{'action'} ||= "blob_plain";
 664                         }
 665                 }
 666                 $input_params{'hash_base'} ||= $refname;
 667                 $input_params{'file_name'} ||= $pathname;
 668         } elsif (defined $refname) {
 669                 # we got "branch". In this case we have to choose if we have to
 670                 # set hash or hash_base.
 671                 #
 672                 # Most of the actions without a pathname only want hash to be
 673                 # set, except for the ones specified in @wants_base that want
 674                 # hash_base instead. It should also be noted that hand-crafted
 675                 # links having 'history' as an action and no pathname or hash
 676                 # set will fail, but that happens regardless of PATH_INFO.
 677                 $input_params{'action'} ||= "shortlog";
 678                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 679                         $input_params{'hash_base'} ||= $refname;
 680                 } else {
 681                         $input_params{'hash'} ||= $refname;
 682                 }
 683         }
 684
 685         # next, handle the 'parent' part, if present
 686         if (defined $parentrefname) {
 687                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 688                 # someproject/blobdiff/oldrev..newrev:/filename
 689                 if ($parentpathname) {
 690                         $parentpathname =~ s,^/+,,;
 691                         $parentpathname =~ s,/$,,;
 692                         $input_params{'file_parent'} ||= $parentpathname;
 693                 } else {
 694                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 695                 }
 696                 # we assume that hash_parent_base is wanted if a path was specified,
 697                 # or if the action wants hash_base instead of hash
 698                 if (defined $input_params{'file_parent'} ||
 699                         grep { $_ eq $input_params{'action'} } @wants_base) {
 700                         $input_params{'hash_parent_base'} ||= $parentrefname;
 701                 } else {
 702                         $input_params{'hash_parent'} ||= $parentrefname;
 703                 }
 704         }
 705
 706         # for the snapshot action, we allow URLs in the form
 707         # $project/snapshot/$hash.ext
 708         # where .ext determines the snapshot and gets removed from the
 709         # passed $refname to provide the $hash.
 710         #
 711         # To be able to tell that $refname includes the format extension, we
 712         # require the following two conditions to be satisfied:
 713         # - the hash input parameter MUST have been set from the $refname part
 714         #   of the URL (i.e. they must be equal)
 715         # - the snapshot format MUST NOT have been defined already (e.g. from
 716         #   CGI parameter sf)
 717         # It's also useless to try any matching unless $refname has a dot,
 718         # so we check for that too
 719         if (defined $input_params{'action'} &&
 720                 $input_params{'action'} eq 'snapshot' &&
 721                 defined $refname && index($refname, '.') != -1 &&
 722                 $refname eq $input_params{'hash'} &&
 723                 !defined $input_params{'snapshot_format'}) {
 724                 # We loop over the known snapshot formats, checking for
 725                 # extensions. Allowed extensions are both the defined suffix
 726                 # (which includes the initial dot already) and the snapshot
 727                 # format key itself, with a prepended dot
 728                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 729                         my $hash = $refname;
 730                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 731                                 next;
 732                         }
 733                         my $sfx = $1;
 734                         # a valid suffix was found, so set the snapshot format
 735                         # and reset the hash parameter
 736                         $input_params{'snapshot_format'} = $fmt;
 737                         $input_params{'hash'} = $hash;
 738                         # we also set the format suffix to the one requested
 739                         # in the URL: this way a request for e.g. .tgz returns
 740                         # a .tgz instead of a .tar.gz
 741                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 742                         last;
 743                 }
 744         }
 745 }
 746 evaluate_path_info();
 747
 748 our $action = $input_params{'action'};
 749 if (defined $action) {
 750         if (!validate_action($action)) {
 751                 die_error(400, "Invalid action parameter");
 752         }
 753 }
 754
 755 # parameters which are pathnames
 756 our $project = $input_params{'project'};
 757 if (defined $project) {
 758         if (!validate_project($project)) {
 759                 undef $project;
 760                 die_error(404, "No such project");
 761         }
 762 }
 763
 764 our $file_name = $input_params{'file_name'};
 765 if (defined $file_name) {
 766         if (!validate_pathname($file_name)) {
 767                 die_error(400, "Invalid file parameter");
 768         }
 769 }
 770
 771 our $file_parent = $input_params{'file_parent'};
 772 if (defined $file_parent) {
 773         if (!validate_pathname($file_parent)) {
 774                 die_error(400, "Invalid file parent parameter");
 775         }
 776 }
 777
 778 # parameters which are refnames
 779 our $hash = $input_params{'hash'};
 780 if (defined $hash) {
 781         if (!validate_refname($hash)) {
 782                 die_error(400, "Invalid hash parameter");
 783         }
 784 }
 785
 786 our $hash_parent = $input_params{'hash_parent'};
 787 if (defined $hash_parent) {
 788         if (!validate_refname($hash_parent)) {
 789                 die_error(400, "Invalid hash parent parameter");
 790         }
 791 }
 792
 793 our $hash_base = $input_params{'hash_base'};
 794 if (defined $hash_base) {
 795         if (!validate_refname($hash_base)) {
 796                 die_error(400, "Invalid hash base parameter");
 797         }
 798 }
 799
 800 our @extra_options = @{$input_params{'extra_options'}};
 801 # @extra_options is always defined, since it can only be (currently) set from
 802 # CGI, and $cgi->param() returns the empty array in array context if the param
 803 # is not set
 804 foreach my $opt (@extra_options) {
 805         if (not exists $allowed_options{$opt}) {
 806                 die_error(400, "Invalid option parameter");
 807         }
 808         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 809                 die_error(400, "Invalid option parameter for this action");
 810         }
 811 }
 812
 813 our $hash_parent_base = $input_params{'hash_parent_base'};
 814 if (defined $hash_parent_base) {
 815         if (!validate_refname($hash_parent_base)) {
 816                 die_error(400, "Invalid hash parent base parameter");
 817         }
 818 }
 819
 820 # other parameters
 821 our $page = $input_params{'page'};
 822 if (defined $page) {
 823         if ($page =~ m/[^0-9]/) {
 824                 die_error(400, "Invalid page parameter");
 825         }
 826 }
 827
 828 our $searchtype = $input_params{'searchtype'};
 829 if (defined $searchtype) {
 830         if ($searchtype =~ m/[^a-z]/) {
 831                 die_error(400, "Invalid searchtype parameter");
 832         }
 833 }
 834
 835 our $search_use_regexp = $input_params{'search_use_regexp'};
 836
 837 our $searchtext = $input_params{'searchtext'};
 838 our $search_regexp;
 839 if (defined $searchtext) {
 840         if (length($searchtext) < 2) {
 841                 die_error(403, "At least two characters are required for search parameter");
 842         }
 843         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 844 }
 845
 846 # path to the current git repository
 847 our $git_dir;
 848 $git_dir = "$projectroot/$project" if $project;
 849
 850 # list of supported snapshot formats
 851 our @snapshot_fmts = gitweb_get_feature('snapshot');
 852 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 853
 854 # check that the avatar feature is set to a known provider name,
 855 # and for each provider check if the dependencies are satisfied.
 856 # if the provider name is invalid or the dependencies are not met,
 857 # reset $git_avatar to the empty string.
 858 our ($git_avatar) = gitweb_get_feature('avatar');
 859 if ($git_avatar eq 'gravatar') {
 860         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 861 } elsif ($git_avatar eq 'picon') {
 862         # no dependencies
 863 } else {
 864         $git_avatar = '';
 865 }
 866
 867 # dispatch
 868 if (!defined $action) {
 869         if (defined $hash) {
 870                 $action = git_get_type($hash);
 871         } elsif (defined $hash_base && defined $file_name) {
 872                 $action = git_get_type("$hash_base:$file_name");
 873         } elsif (defined $project) {
 874                 $action = 'summary';
 875         } else {
 876                 $action = 'project_list';
 877         }
 878 }
 879 if (!defined($actions{$action})) {
 880         die_error(400, "Unknown action");
 881 }
 882 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 883     !$project) {
 884         die_error(400, "Project needed");
 885 }
 886 $actions{$action}->();
 887 exit;
 888
 889 ## ======================================================================
 890 ## action links
 891
 892 sub href {
 893         my %params = @_;
 894         # default is to use -absolute url() i.e. $my_uri
 895         my $href = $params{-full} ? $my_url : $my_uri;
 896
 897         $params{'project'} = $project unless exists $params{'project'};
 898
 899         if ($params{-replay}) {
 900                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 901                         if (!exists $params{$name}) {
 902                                 $params{$name} = $input_params{$name};
 903                         }
 904                 }
 905         }
 906
 907         my $use_pathinfo = gitweb_check_feature('pathinfo');
 908         if ($use_pathinfo and defined $params{'project'}) {
 909                 # try to put as many parameters as possible in PATH_INFO:
 910                 #   - project name
 911                 #   - action
 912                 #   - hash_parent or hash_parent_base:/file_parent
 913                 #   - hash or hash_base:/filename
 914                 #   - the snapshot_format as an appropriate suffix
 915
 916                 # When the script is the root DirectoryIndex for the domain,
 917                 # $href here would be something like http://gitweb.example.com/
 918                 # Thus, we strip any trailing / from $href, to spare us double
 919                 # slashes in the final URL
 920                 $href =~ s,/$,,;
 921
 922                 # Then add the project name, if present
 923                 $href .= "/".esc_url($params{'project'});
 924                 delete $params{'project'};
 925
 926                 # since we destructively absorb parameters, we keep this
 927                 # boolean that remembers if we're handling a snapshot
 928                 my $is_snapshot = $params{'action'} eq 'snapshot';
 929
 930                 # Summary just uses the project path URL, any other action is
 931                 # added to the URL
 932                 if (defined $params{'action'}) {
 933                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 934                         delete $params{'action'};
 935                 }
 936
 937                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 938                 # stripping nonexistent or useless pieces
 939                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 940                         || $params{'hash_parent'} || $params{'hash'});
 941                 if (defined $params{'hash_base'}) {
 942                         if (defined $params{'hash_parent_base'}) {
 943                                 $href .= esc_url($params{'hash_parent_base'});
 944                                 # skip the file_parent if it's the same as the file_name
 945                                 if (defined $params{'file_parent'}) {
 946                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 947                                                 delete $params{'file_parent'};
 948                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 949                                                 $href .= ":/".esc_url($params{'file_parent'});
 950                                                 delete $params{'file_parent'};
 951                                         }
 952                                 }
 953                                 $href .= "..";
 954                                 delete $params{'hash_parent'};
 955                                 delete $params{'hash_parent_base'};
 956                         } elsif (defined $params{'hash_parent'}) {
 957                                 $href .= esc_url($params{'hash_parent'}). "..";
 958                                 delete $params{'hash_parent'};
 959                         }
 960
 961                         $href .= esc_url($params{'hash_base'});
 962                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 963                                 $href .= ":/".esc_url($params{'file_name'});
 964                                 delete $params{'file_name'};
 965                         }
 966                         delete $params{'hash'};
 967                         delete $params{'hash_base'};
 968                 } elsif (defined $params{'hash'}) {
 969                         $href .= esc_url($params{'hash'});
 970                         delete $params{'hash'};
 971                 }
 972
 973                 # If the action was a snapshot, we can absorb the
 974                 # snapshot_format parameter too
 975                 if ($is_snapshot) {
 976                         my $fmt = $params{'snapshot_format'};
 977                         # snapshot_format should always be defined when href()
 978                         # is called, but just in case some code forgets, we
 979                         # fall back to the default
 980                         $fmt ||= $snapshot_fmts[0];
 981                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 982                         delete $params{'snapshot_format'};
 983                 }
 984         }
 985
 986         # now encode the parameters explicitly
 987         my @result = ();
 988         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 989                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 990                 if (defined $params{$name}) {
 991                         if (ref($params{$name}) eq "ARRAY") {
 992                                 foreach my $par (@{$params{$name}}) {
 993                                         push @result, $symbol . "=" . esc_param($par);
 994                                 }
 995                         } else {
 996                                 push @result, $symbol . "=" . esc_param($params{$name});
 997                         }
 998                 }
 999         }
1000         $href .= "?" . join(';', @result) if scalar @result;
1001
1002         return $href;
1003 }
1004
1005
1006 ## ======================================================================
1007 ## validation, quoting/unquoting and escaping
1008
1009 sub validate_action {
1010         my $input = shift || return undef;
1011         return undef unless exists $actions{$input};
1012         return $input;
1013 }
1014
1015 sub validate_project {
1016         my $input = shift || return undef;
1017         if (!validate_pathname($input) ||
1018                 !(-d "$projectroot/$input") ||
1019                 !check_export_ok("$projectroot/$input") ||
1020                 ($strict_export && !project_in_list($input))) {
1021                 return undef;
1022         } else {
1023                 return $input;
1024         }
1025 }
1026
1027 sub validate_pathname {
1028         my $input = shift || return undef;
1029
1030         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1031         # at the beginning, at the end, and between slashes.
1032         # also this catches doubled slashes
1033         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1034                 return undef;
1035         }
1036         # no null characters
1037         if ($input =~ m!\0!) {
1038                 return undef;
1039         }
1040         return $input;
1041 }
1042
1043 sub validate_refname {
1044         my $input = shift || return undef;
1045
1046         # textual hashes are O.K.
1047         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1048                 return $input;
1049         }
1050         # it must be correct pathname
1051         $input = validate_pathname($input)
1052                 or return undef;
1053         # restrictions on ref name according to git-check-ref-format
1054         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1055                 return undef;
1056         }
1057         return $input;
1058 }
1059
1060 # decode sequences of octets in utf8 into Perl's internal form,
1061 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1062 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1063 sub to_utf8 {
1064         my $str = shift;
1065         if (utf8::valid($str)) {
1066                 utf8::decode($str);
1067                 return $str;
1068         } else {
1069                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1070         }
1071 }
1072
1073 # quote unsafe chars, but keep the slash, even when it's not
1074 # correct, but quoted slashes look too horrible in bookmarks
1075 sub esc_param {
1076         my $str = shift;
1077         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1078         $str =~ s/\+/%2B/g;
1079         $str =~ s/ /\+/g;
1080         return $str;
1081 }
1082
1083 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1084 sub esc_url {
1085         my $str = shift;
1086         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1087         $str =~ s/\+/%2B/g;
1088         $str =~ s/ /\+/g;
1089         return $str;
1090 }
1091
1092 # replace invalid utf8 character with SUBSTITUTION sequence
1093 sub esc_html {
1094         my $str = shift;
1095         my %opts = @_;
1096
1097         $str = to_utf8($str);
1098         $str = $cgi->escapeHTML($str);
1099         if ($opts{'-nbsp'}) {
1100                 $str =~ s/ /&nbsp;/g;
1101         }
1102         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1103         return $str;
1104 }
1105
1106 # quote control characters and escape filename to HTML
1107 sub esc_path {
1108         my $str = shift;
1109         my %opts = @_;
1110
1111         $str = to_utf8($str);
1112         $str = $cgi->escapeHTML($str);
1113         if ($opts{'-nbsp'}) {
1114                 $str =~ s/ /&nbsp;/g;
1115         }
1116         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1117         return $str;
1118 }
1119
1120 # Make control characters "printable", using character escape codes (CEC)
1121 sub quot_cec {
1122         my $cntrl = shift;
1123         my %opts = @_;
1124         my %es = ( # character escape codes, aka escape sequences
1125                 "\t" => '\t',   # tab            (HT)
1126                 "\n" => '\n',   # line feed      (LF)
1127                 "\r" => '\r',   # carrige return (CR)
1128                 "\f" => '\f',   # form feed      (FF)
1129                 "\b" => '\b',   # backspace      (BS)
1130                 "\a" => '\a',   # alarm (bell)   (BEL)
1131                 "\e" => '\e',   # escape         (ESC)
1132                 "\013" => '\v', # vertical tab   (VT)
1133                 "\000" => '\0', # nul character  (NUL)
1134         );
1135         my $chr = ( (exists $es{$cntrl})
1136                     ? $es{$cntrl}
1137                     : sprintf('\%2x', ord($cntrl)) );
1138         if ($opts{-nohtml}) {
1139                 return $chr;
1140         } else {
1141                 return "<span class=\"cntrl\">$chr</span>";
1142         }
1143 }
1144
1145 # Alternatively use unicode control pictures codepoints,
1146 # Unicode "printable representation" (PR)
1147 sub quot_upr {
1148         my $cntrl = shift;
1149         my %opts = @_;
1150
1151         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1152         if ($opts{-nohtml}) {
1153                 return $chr;
1154         } else {
1155                 return "<span class=\"cntrl\">$chr</span>";
1156         }
1157 }
1158
1159 # git may return quoted and escaped filenames
1160 sub unquote {
1161         my $str = shift;
1162
1163         sub unq {
1164                 my $seq = shift;
1165                 my %es = ( # character escape codes, aka escape sequences
1166                         't' => "\t",   # tab            (HT, TAB)
1167                         'n' => "\n",   # newline        (NL)
1168                         'r' => "\r",   # return         (CR)
1169                         'f' => "\f",   # form feed      (FF)
1170                         'b' => "\b",   # backspace      (BS)
1171                         'a' => "\a",   # alarm (bell)   (BEL)
1172                         'e' => "\e",   # escape         (ESC)
1173                         'v' => "\013", # vertical tab   (VT)
1174                 );
1175
1176                 if ($seq =~ m/^[0-7]{1,3}$/) {
1177                         # octal char sequence
1178                         return chr(oct($seq));
1179                 } elsif (exists $es{$seq}) {
1180                         # C escape sequence, aka character escape code
1181                         return $es{$seq};
1182                 }
1183                 # quoted ordinary character
1184                 return $seq;
1185         }
1186
1187         if ($str =~ m/^"(.*)"$/) {
1188                 # needs unquoting
1189                 $str = $1;
1190                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1191         }
1192         return $str;
1193 }
1194
1195 # escape tabs (convert tabs to spaces)
1196 sub untabify {
1197         my $line = shift;
1198
1199         while ((my $pos = index($line, "\t")) != -1) {
1200                 if (my $count = (8 - ($pos % 8))) {
1201                         my $spaces = ' ' x $count;
1202                         $line =~ s/\t/$spaces/;
1203                 }
1204         }
1205
1206         return $line;
1207 }
1208
1209 sub project_in_list {
1210         my $project = shift;
1211         my @list = git_get_projects_list();
1212         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1213 }
1214
1215 ## ----------------------------------------------------------------------
1216 ## HTML aware string manipulation
1217
1218 # Try to chop given string on a word boundary between position
1219 # $len and $len+$add_len. If there is no word boundary there,
1220 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1221 # (marking chopped part) would be longer than given string.
1222 sub chop_str {
1223         my $str = shift;
1224         my $len = shift;
1225         my $add_len = shift || 10;
1226         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1227
1228         # Make sure perl knows it is utf8 encoded so we don't
1229         # cut in the middle of a utf8 multibyte char.
1230         $str = to_utf8($str);
1231
1232         # allow only $len chars, but don't cut a word if it would fit in $add_len
1233         # if it doesn't fit, cut it if it's still longer than the dots we would add
1234         # remove chopped character entities entirely
1235
1236         # when chopping in the middle, distribute $len into left and right part
1237         # return early if chopping wouldn't make string shorter
1238         if ($where eq 'center') {
1239                 return $str if ($len + 5 >= length($str)); # filler is length 5
1240                 $len = int($len/2);
1241         } else {
1242                 return $str if ($len + 4 >= length($str)); # filler is length 4
1243         }
1244
1245         # regexps: ending and beginning with word part up to $add_len
1246         my $endre = qr/.{$len}\w{0,$add_len}/;
1247         my $begre = qr/\w{0,$add_len}.{$len}/;
1248
1249         if ($where eq 'left') {
1250                 $str =~ m/^(.*?)($begre)$/;
1251                 my ($lead, $body) = ($1, $2);
1252                 if (length($lead) > 4) {
1253                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1254                         $lead = " ...";
1255                 }
1256                 return "$lead$body";
1257
1258         } elsif ($where eq 'center') {
1259                 $str =~ m/^($endre)(.*)$/;
1260                 my ($left, $str)  = ($1, $2);
1261                 $str =~ m/^(.*?)($begre)$/;
1262                 my ($mid, $right) = ($1, $2);
1263                 if (length($mid) > 5) {
1264                         $left  =~ s/&[^;]*$//;
1265                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1266                         $mid = " ... ";
1267                 }
1268                 return "$left$mid$right";
1269
1270         } else {
1271                 $str =~ m/^($endre)(.*)$/;
1272                 my $body = $1;
1273                 my $tail = $2;
1274                 if (length($tail) > 4) {
1275                         $body =~ s/&[^;]*$//;
1276                         $tail = "... ";
1277                 }
1278                 return "$body$tail";
1279         }
1280 }
1281
1282 # takes the same arguments as chop_str, but also wraps a <span> around the
1283 # result with a title attribute if it does get chopped. Additionally, the
1284 # string is HTML-escaped.
1285 sub chop_and_escape_str {
1286         my ($str) = @_;
1287
1288         my $chopped = chop_str(@_);
1289         if ($chopped eq $str) {
1290                 return esc_html($chopped);
1291         } else {
1292                 $str =~ s/[[:cntrl:]]/?/g;
1293                 return $cgi->span({-title=>$str}, esc_html($chopped));
1294         }
1295 }
1296
1297 ## ----------------------------------------------------------------------
1298 ## functions returning short strings
1299
1300 # CSS class for given age value (in seconds)
1301 sub age_class {
1302         my $age = shift;
1303
1304         if (!defined $age) {
1305                 return "noage";
1306         } elsif ($age < 60*60*2) {
1307                 return "age0";
1308         } elsif ($age < 60*60*24*2) {
1309                 return "age1";
1310         } else {
1311                 return "age2";
1312         }
1313 }
1314
1315 # convert age in seconds to "nn units ago" string
1316 sub age_string {
1317         my $age = shift;
1318         my $age_str;
1319
1320         if ($age > 60*60*24*365*2) {
1321                 $age_str = (int $age/60/60/24/365);
1322                 $age_str .= " years ago";
1323         } elsif ($age > 60*60*24*(365/12)*2) {
1324                 $age_str = int $age/60/60/24/(365/12);
1325                 $age_str .= " months ago";
1326         } elsif ($age > 60*60*24*7*2) {
1327                 $age_str = int $age/60/60/24/7;
1328                 $age_str .= " weeks ago";
1329         } elsif ($age > 60*60*24*2) {
1330                 $age_str = int $age/60/60/24;
1331                 $age_str .= " days ago";
1332         } elsif ($age > 60*60*2) {
1333                 $age_str = int $age/60/60;
1334                 $age_str .= " hours ago";
1335         } elsif ($age > 60*2) {
1336                 $age_str = int $age/60;
1337                 $age_str .= " min ago";
1338         } elsif ($age > 2) {
1339                 $age_str = int $age;
1340                 $age_str .= " sec ago";
1341         } else {
1342                 $age_str .= " right now";
1343         }
1344         return $age_str;
1345 }
1346
1347 use constant {
1348         S_IFINVALID => 0030000,
1349         S_IFGITLINK => 0160000,
1350 };
1351
1352 # submodule/subproject, a commit object reference
1353 sub S_ISGITLINK {
1354         my $mode = shift;
1355
1356         return (($mode & S_IFMT) == S_IFGITLINK)
1357 }
1358
1359 # convert file mode in octal to symbolic file mode string
1360 sub mode_str {
1361         my $mode = oct shift;
1362
1363         if (S_ISGITLINK($mode)) {
1364                 return 'm---------';
1365         } elsif (S_ISDIR($mode & S_IFMT)) {
1366                 return 'drwxr-xr-x';
1367         } elsif (S_ISLNK($mode)) {
1368                 return 'lrwxrwxrwx';
1369         } elsif (S_ISREG($mode)) {
1370                 # git cares only about the executable bit
1371                 if ($mode & S_IXUSR) {
1372                         return '-rwxr-xr-x';
1373                 } else {
1374                         return '-rw-r--r--';
1375                 };
1376         } else {
1377                 return '----------';
1378         }
1379 }
1380
1381 # convert file mode in octal to file type string
1382 sub file_type {
1383         my $mode = shift;
1384
1385         if ($mode !~ m/^[0-7]+$/) {
1386                 return $mode;
1387         } else {
1388                 $mode = oct $mode;
1389         }
1390
1391         if (S_ISGITLINK($mode)) {
1392                 return "submodule";
1393         } elsif (S_ISDIR($mode & S_IFMT)) {
1394                 return "directory";
1395         } elsif (S_ISLNK($mode)) {
1396                 return "symlink";
1397         } elsif (S_ISREG($mode)) {
1398                 return "file";
1399         } else {
1400                 return "unknown";
1401         }
1402 }
1403
1404 # convert file mode in octal to file type description string
1405 sub file_type_long {
1406         my $mode = shift;
1407
1408         if ($mode !~ m/^[0-7]+$/) {
1409                 return $mode;
1410         } else {
1411                 $mode = oct $mode;
1412         }
1413
1414         if (S_ISGITLINK($mode)) {
1415                 return "submodule";
1416         } elsif (S_ISDIR($mode & S_IFMT)) {
1417                 return "directory";
1418         } elsif (S_ISLNK($mode)) {
1419                 return "symlink";
1420         } elsif (S_ISREG($mode)) {
1421                 if ($mode & S_IXUSR) {
1422                         return "executable";
1423                 } else {
1424                         return "file";
1425                 };
1426         } else {
1427                 return "unknown";
1428         }
1429 }
1430
1431
1432 ## ----------------------------------------------------------------------
1433 ## functions returning short HTML fragments, or transforming HTML fragments
1434 ## which don't belong to other sections
1435
1436 # format line of commit message.
1437 sub format_log_line_html {
1438         my $line = shift;
1439
1440         $line = esc_html($line, -nbsp=>1);
1441         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1442                 $cgi->a({-href => href(action=>"object", hash=>$1),
1443                                         -class => "text"}, $1);
1444         }eg;
1445
1446         return $line;
1447 }
1448
1449 # format marker of refs pointing to given object
1450
1451 # the destination action is chosen based on object type and current context:
1452 # - for annotated tags, we choose the tag view unless it's the current view
1453 #   already, in which case we go to shortlog view
1454 # - for other refs, we keep the current view if we're in history, shortlog or
1455 #   log view, and select shortlog otherwise
1456 sub format_ref_marker {
1457         my ($refs, $id) = @_;
1458         my $markers = '';
1459
1460         if (defined $refs->{$id}) {
1461                 foreach my $ref (@{$refs->{$id}}) {
1462                         # this code exploits the fact that non-lightweight tags are the
1463                         # only indirect objects, and that they are the only objects for which
1464                         # we want to use tag instead of shortlog as action
1465                         my ($type, $name) = qw();
1466                         my $indirect = ($ref =~ s/\^\{\}$//);
1467                         # e.g. tags/v2.6.11 or heads/next
1468                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1469                                 $type = $1;
1470                                 $name = $2;
1471                         } else {
1472                                 $type = "ref";
1473                                 $name = $ref;
1474                         }
1475
1476                         my $class = $type;
1477                         $class .= " indirect" if $indirect;
1478
1479                         my $dest_action = "shortlog";
1480
1481                         if ($indirect) {
1482                                 $dest_action = "tag" unless $action eq "tag";
1483                         } elsif ($action =~ /^(history|(short)?log)$/) {
1484                                 $dest_action = $action;
1485                         }
1486
1487                         my $dest = "";
1488                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1489                         $dest .= $ref;
1490
1491                         my $link = $cgi->a({
1492                                 -href => href(
1493                                         action=>$dest_action,
1494                                         hash=>$dest
1495                                 )}, $name);
1496
1497                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1498                                 $link . "</span>";
1499                 }
1500         }
1501
1502         if ($markers) {
1503                 return ' <span class="refs">'. $markers . '</span>';
1504         } else {
1505                 return "";
1506         }
1507 }
1508
1509 # format, perhaps shortened and with markers, title line
1510 sub format_subject_html {
1511         my ($long, $short, $href, $extra) = @_;
1512         $extra = '' unless defined($extra);
1513
1514         if (length($short) < length($long)) {
1515                 $long =~ s/[[:cntrl:]]/?/g;
1516                 return $cgi->a({-href => $href, -class => "list subject",
1517                                 -title => to_utf8($long)},
1518                        esc_html($short) . $extra);
1519         } else {
1520                 return $cgi->a({-href => $href, -class => "list subject"},
1521                        esc_html($long)  . $extra);
1522         }
1523 }
1524
1525 # Rather than recomputing the url for an email multiple times, we cache it
1526 # after the first hit. This gives a visible benefit in views where the avatar
1527 # for the same email is used repeatedly (e.g. shortlog).
1528 # The cache is shared by all avatar engines (currently gravatar only), which
1529 # are free to use it as preferred. Since only one avatar engine is used for any
1530 # given page, there's no risk for cache conflicts.
1531 our %avatar_cache = ();
1532
1533 # Compute the picon url for a given email, by using the picon search service over at
1534 # http://www.cs.indiana.edu/picons/search.html
1535 sub picon_url {
1536         my $email = lc shift;
1537         if (!$avatar_cache{$email}) {
1538                 my ($user, $domain) = split('@', $email);
1539                 $avatar_cache{$email} =
1540                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1541                         "$domain/$user/" .
1542                         "users+domains+unknown/up/single";
1543         }
1544         return $avatar_cache{$email};
1545 }
1546
1547 # Compute the gravatar url for a given email, if it's not in the cache already.
1548 # Gravatar stores only the part of the URL before the size, since that's the
1549 # one computationally more expensive. This also allows reuse of the cache for
1550 # different sizes (for this particular engine).
1551 sub gravatar_url {
1552         my $email = lc shift;
1553         my $size = shift;
1554         $avatar_cache{$email} ||=
1555                 "http://www.gravatar.com/avatar/" .
1556                         Digest::MD5::md5_hex($email) . "?s=";
1557         return $avatar_cache{$email} . $size;
1558 }
1559
1560 # Insert an avatar for the given $email at the given $size if the feature
1561 # is enabled.
1562 sub git_get_avatar {
1563         my ($email, %opts) = @_;
1564         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1565         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1566         $opts{-size} ||= 'default';
1567         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1568         my $url = "";
1569         if ($git_avatar eq 'gravatar') {
1570                 $url = gravatar_url($email, $size);
1571         } elsif ($git_avatar eq 'picon') {
1572                 $url = picon_url($email);
1573         }
1574         # Other providers can be added by extending the if chain, defining $url
1575         # as needed. If no variant puts something in $url, we assume avatars
1576         # are completely disabled/unavailable.
1577         if ($url) {
1578                 return $pre_white .
1579                        "<img width=\"$size\" " .
1580                             "class=\"avatar\" " .
1581                             "src=\"$url\" " .
1582                             "alt=\"\" " .
1583                        "/>" . $post_white;
1584         } else {
1585                 return "";
1586         }
1587 }
1588
1589 # format the author name of the given commit with the given tag
1590 # the author name is chopped and escaped according to the other
1591 # optional parameters (see chop_str).
1592 sub format_author_html {
1593         my $tag = shift;
1594         my $co = shift;
1595         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1596         return "<$tag class=\"author\">" .
1597                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1598                $author . "</$tag>";
1599 }
1600
1601 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1602 sub format_git_diff_header_line {
1603         my $line = shift;
1604         my $diffinfo = shift;
1605         my ($from, $to) = @_;
1606
1607         if ($diffinfo->{'nparents'}) {
1608                 # combined diff
1609                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1610                 if ($to->{'href'}) {
1611                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1612                                          esc_path($to->{'file'}));
1613                 } else { # file was deleted (no href)
1614                         $line .= esc_path($to->{'file'});
1615                 }
1616         } else {
1617                 # "ordinary" diff
1618                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1619                 if ($from->{'href'}) {
1620                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1621                                          'a/' . esc_path($from->{'file'}));
1622                 } else { # file was added (no href)
1623                         $line .= 'a/' . esc_path($from->{'file'});
1624                 }
1625                 $line .= ' ';
1626                 if ($to->{'href'}) {
1627                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1628                                          'b/' . esc_path($to->{'file'}));
1629                 } else { # file was deleted
1630                         $line .= 'b/' . esc_path($to->{'file'});
1631                 }
1632         }
1633
1634         return "<div class=\"diff header\">$line</div>\n";
1635 }
1636
1637 # format extended diff header line, before patch itself
1638 sub format_extended_diff_header_line {
1639         my $line = shift;
1640         my $diffinfo = shift;
1641         my ($from, $to) = @_;
1642
1643         # match <path>
1644         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1645                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1646                                        esc_path($from->{'file'}));
1647         }
1648         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1649                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1650                                  esc_path($to->{'file'}));
1651         }
1652         # match single <mode>
1653         if ($line =~ m/\s(\d{6})$/) {
1654                 $line .= '<span class="info"> (' .
1655                          file_type_long($1) .
1656                          ')</span>';
1657         }
1658         # match <hash>
1659         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1660                 # can match only for combined diff
1661                 $line = 'index ';
1662                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1663                         if ($from->{'href'}[$i]) {
1664                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1665                                                   -class=>"hash"},
1666                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1667                         } else {
1668                                 $line .= '0' x 7;
1669                         }
1670                         # separator
1671                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1672                 }
1673                 $line .= '..';
1674                 if ($to->{'href'}) {
1675                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1676                                          substr($diffinfo->{'to_id'},0,7));
1677                 } else {
1678                         $line .= '0' x 7;
1679                 }
1680
1681         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1682                 # can match only for ordinary diff
1683                 my ($from_link, $to_link);
1684                 if ($from->{'href'}) {
1685                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1686                                              substr($diffinfo->{'from_id'},0,7));
1687                 } else {
1688                         $from_link = '0' x 7;
1689                 }
1690                 if ($to->{'href'}) {
1691                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1692                                            substr($diffinfo->{'to_id'},0,7));
1693                 } else {
1694                         $to_link = '0' x 7;
1695                 }
1696                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1697                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1698         }
1699
1700         return $line . "<br/>\n";
1701 }
1702
1703 # format from-file/to-file diff header
1704 sub format_diff_from_to_header {
1705         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1706         my $line;
1707         my $result = '';
1708
1709         $line = $from_line;
1710         #assert($line =~ m/^---/) if DEBUG;
1711         # no extra formatting for "^--- /dev/null"
1712         if (! $diffinfo->{'nparents'}) {
1713                 # ordinary (single parent) diff
1714                 if ($line =~ m!^--- "?a/!) {
1715                         if ($from->{'href'}) {
1716                                 $line = '--- a/' .
1717                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1718                                                 esc_path($from->{'file'}));
1719                         } else {
1720                                 $line = '--- a/' .
1721                                         esc_path($from->{'file'});
1722                         }
1723                 }
1724                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1725
1726         } else {
1727                 # combined diff (merge commit)
1728                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1729                         if ($from->{'href'}[$i]) {
1730                                 $line = '--- ' .
1731                                         $cgi->a({-href=>href(action=>"blobdiff",
1732                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1733                                                              hash_parent_base=>$parents[$i],
1734                                                              file_parent=>$from->{'file'}[$i],
1735                                                              hash=>$diffinfo->{'to_id'},
1736                                                              hash_base=>$hash,
1737                                                              file_name=>$to->{'file'}),
1738                                                  -class=>"path",
1739                                                  -title=>"diff" . ($i+1)},
1740                                                 $i+1) .
1741                                         '/' .
1742                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1743                                                 esc_path($from->{'file'}[$i]));
1744                         } else {
1745                                 $line = '--- /dev/null';
1746                         }
1747                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1748                 }
1749         }
1750
1751         $line = $to_line;
1752         #assert($line =~ m/^\+\+\+/) if DEBUG;
1753         # no extra formatting for "^+++ /dev/null"
1754         if ($line =~ m!^\+\+\+ "?b/!) {
1755                 if ($to->{'href'}) {
1756                         $line = '+++ b/' .
1757                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1758                                         esc_path($to->{'file'}));
1759                 } else {
1760                         $line = '+++ b/' .
1761                                 esc_path($to->{'file'});
1762                 }
1763         }
1764         $result .= qq!<div class="diff to_file">$line</div>\n!;
1765
1766         return $result;
1767 }
1768
1769 # create note for patch simplified by combined diff
1770 sub format_diff_cc_simplified {
1771         my ($diffinfo, @parents) = @_;
1772         my $result = '';
1773
1774         $result .= "<div class=\"diff header\">" .
1775                    "diff --cc ";
1776         if (!is_deleted($diffinfo)) {
1777                 $result .= $cgi->a({-href => href(action=>"blob",
1778                                                   hash_base=>$hash,
1779                                                   hash=>$diffinfo->{'to_id'},
1780                                                   file_name=>$diffinfo->{'to_file'}),
1781                                     -class => "path"},
1782                                    esc_path($diffinfo->{'to_file'}));
1783         } else {
1784                 $result .= esc_path($diffinfo->{'to_file'});
1785         }
1786         $result .= "</div>\n" . # class="diff header"
1787                    "<div class=\"diff nodifferences\">" .
1788                    "Simple merge" .
1789                    "</div>\n"; # class="diff nodifferences"
1790
1791         return $result;
1792 }
1793
1794 # format patch (diff) line (not to be used for diff headers)
1795 sub format_diff_line {
1796         my $line = shift;
1797         my ($from, $to) = @_;
1798         my $diff_class = "";
1799
1800         chomp $line;
1801
1802         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1803                 # combined diff
1804                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1805                 if ($line =~ m/^\@{3}/) {
1806                         $diff_class = " chunk_header";
1807                 } elsif ($line =~ m/^\\/) {
1808                         $diff_class = " incomplete";
1809                 } elsif ($prefix =~ tr/+/+/) {
1810                         $diff_class = " add";
1811                 } elsif ($prefix =~ tr/-/-/) {
1812                         $diff_class = " rem";
1813                 }
1814         } else {
1815                 # assume ordinary diff
1816                 my $char = substr($line, 0, 1);
1817                 if ($char eq '+') {
1818                         $diff_class = " add";
1819                 } elsif ($char eq '-') {
1820                         $diff_class = " rem";
1821                 } elsif ($char eq '@') {
1822                         $diff_class = " chunk_header";
1823                 } elsif ($char eq "\\") {
1824                         $diff_class = " incomplete";
1825                 }
1826         }
1827         $line = untabify($line);
1828         if ($from && $to && $line =~ m/^\@{2} /) {
1829                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1830                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1831
1832                 $from_lines = 0 unless defined $from_lines;
1833                 $to_lines   = 0 unless defined $to_lines;
1834
1835                 if ($from->{'href'}) {
1836                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1837                                              -class=>"list"}, $from_text);
1838                 }
1839                 if ($to->{'href'}) {
1840                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1841                                              -class=>"list"}, $to_text);
1842                 }
1843                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1844                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1845                 return "<div class=\"diff$diff_class\">$line</div>\n";
1846         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1847                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1848                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1849
1850                 @from_text = split(' ', $ranges);
1851                 for (my $i = 0; $i < @from_text; ++$i) {
1852                         ($from_start[$i], $from_nlines[$i]) =
1853                                 (split(',', substr($from_text[$i], 1)), 0);
1854                 }
1855
1856                 $to_text   = pop @from_text;
1857                 $to_start  = pop @from_start;
1858                 $to_nlines = pop @from_nlines;
1859
1860                 $line = "<span class=\"chunk_info\">$prefix ";
1861                 for (my $i = 0; $i < @from_text; ++$i) {
1862                         if ($from->{'href'}[$i]) {
1863                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1864                                                   -class=>"list"}, $from_text[$i]);
1865                         } else {
1866                                 $line .= $from_text[$i];
1867                         }
1868                         $line .= " ";
1869                 }
1870                 if ($to->{'href'}) {
1871                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1872                                           -class=>"list"}, $to_text);
1873                 } else {
1874                         $line .= $to_text;
1875                 }
1876                 $line .= " $prefix</span>" .
1877                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1878                 return "<div class=\"diff$diff_class\">$line</div>\n";
1879         }
1880         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1881 }
1882
1883 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1884 # linked.  Pass the hash of the tree/commit to snapshot.
1885 sub format_snapshot_links {
1886         my ($hash) = @_;
1887         my $num_fmts = @snapshot_fmts;
1888         if ($num_fmts > 1) {
1889                 # A parenthesized list of links bearing format names.
1890                 # e.g. "snapshot (_tar.gz_ _zip_)"
1891                 return "snapshot (" . join(' ', map
1892                         $cgi->a({
1893                                 -href => href(
1894                                         action=>"snapshot",
1895                                         hash=>$hash,
1896                                         snapshot_format=>$_
1897                                 )
1898                         }, $known_snapshot_formats{$_}{'display'})
1899                 , @snapshot_fmts) . ")";
1900         } elsif ($num_fmts == 1) {
1901                 # A single "snapshot" link whose tooltip bears the format name.
1902                 # i.e. "_snapshot_"
1903                 my ($fmt) = @snapshot_fmts;
1904                 return
1905                         $cgi->a({
1906                                 -href => href(
1907                                         action=>"snapshot",
1908                                         hash=>$hash,
1909                                         snapshot_format=>$fmt
1910                                 ),
1911                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1912                         }, "snapshot");
1913         } else { # $num_fmts == 0
1914                 return undef;
1915         }
1916 }
1917
1918 ## ......................................................................
1919 ## functions returning values to be passed, perhaps after some
1920 ## transformation, to other functions; e.g. returning arguments to href()
1921
1922 # returns hash to be passed to href to generate gitweb URL
1923 # in -title key it returns description of link
1924 sub get_feed_info {
1925         my $format = shift || 'Atom';
1926         my %res = (action => lc($format));
1927
1928         # feed links are possible only for project views
1929         return unless (defined $project);
1930         # some views should link to OPML, or to generic project feed,
1931         # or don't have specific feed yet (so they should use generic)
1932         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1933
1934         my $branch;
1935         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1936         # from tag links; this also makes possible to detect branch links
1937         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1938             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1939                 $branch = $1;
1940         }
1941         # find log type for feed description (title)
1942         my $type = 'log';
1943         if (defined $file_name) {
1944                 $type  = "history of $file_name";
1945                 $type .= "/" if ($action eq 'tree');
1946                 $type .= " on '$branch'" if (defined $branch);
1947         } else {
1948                 $type = "log of $branch" if (defined $branch);
1949         }
1950
1951         $res{-title} = $type;
1952         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1953         $res{'file_name'} = $file_name;
1954
1955         return %res;
1956 }
1957
1958 ## ----------------------------------------------------------------------
1959 ## git utility subroutines, invoking git commands
1960
1961 # returns path to the core git executable and the --git-dir parameter as list
1962 sub git_cmd {
1963         return $GIT, '--git-dir='.$git_dir;
1964 }
1965
1966 # quote the given arguments for passing them to the shell
1967 # quote_command("command", "arg 1", "arg with ' and ! characters")
1968 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1969 # Try to avoid using this function wherever possible.
1970 sub quote_command {
1971         return join(' ',
1972                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1973 }
1974
1975 # get HEAD ref of given project as hash
1976 sub git_get_head_hash {
1977         my $project = shift;
1978         my $o_git_dir = $git_dir;
1979         my $retval = undef;
1980         $git_dir = "$projectroot/$project";
1981         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1982                 my $head = <$fd>;
1983                 close $fd;
1984                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1985                         $retval = $1;
1986                 }
1987         }
1988         if (defined $o_git_dir) {
1989                 $git_dir = $o_git_dir;
1990         }
1991         return $retval;
1992 }
1993
1994 # get type of given object
1995 sub git_get_type {
1996         my $hash = shift;
1997
1998         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1999         my $type = <$fd>;
2000         close $fd or return;
2001         chomp $type;
2002         return $type;
2003 }
2004
2005 # repository configuration
2006 our $config_file = '';
2007 our %config;
2008
2009 # store multiple values for single key as anonymous array reference
2010 # single values stored directly in the hash, not as [ <value> ]
2011 sub hash_set_multi {
2012         my ($hash, $key, $value) = @_;
2013
2014         if (!exists $hash->{$key}) {
2015                 $hash->{$key} = $value;
2016         } elsif (!ref $hash->{$key}) {
2017                 $hash->{$key} = [ $hash->{$key}, $value ];
2018         } else {
2019                 push @{$hash->{$key}}, $value;
2020         }
2021 }
2022
2023 # return hash of git project configuration
2024 # optionally limited to some section, e.g. 'gitweb'
2025 sub git_parse_project_config {
2026         my $section_regexp = shift;
2027         my %config;
2028
2029         local $/ = "\0";
2030
2031         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2032                 or return;
2033
2034         while (my $keyval = <$fh>) {
2035                 chomp $keyval;
2036                 my ($key, $value) = split(/\n/, $keyval, 2);
2037
2038                 hash_set_multi(\%config, $key, $value)
2039                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2040         }
2041         close $fh;
2042
2043         return %config;
2044 }
2045
2046 # convert config value to boolean: 'true' or 'false'
2047 # no value, number > 0, 'true' and 'yes' values are true
2048 # rest of values are treated as false (never as error)
2049 sub config_to_bool {
2050         my $val = shift;
2051
2052         return 1 if !defined $val;             # section.key
2053
2054         # strip leading and trailing whitespace
2055         $val =~ s/^\s+//;
2056         $val =~ s/\s+$//;
2057
2058         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2059                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2060 }
2061
2062 # convert config value to simple decimal number
2063 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2064 # to be multiplied by 1024, 1048576, or 1073741824
2065 sub config_to_int {
2066         my $val = shift;
2067
2068         # strip leading and trailing whitespace
2069         $val =~ s/^\s+//;
2070         $val =~ s/\s+$//;
2071
2072         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2073                 $unit = lc($unit);
2074                 # unknown unit is treated as 1
2075                 return $num * ($unit eq 'g' ? 1073741824 :
2076                                $unit eq 'm' ?    1048576 :
2077                                $unit eq 'k' ?       1024 : 1);
2078         }
2079         return $val;
2080 }
2081
2082 # convert config value to array reference, if needed
2083 sub config_to_multi {
2084         my $val = shift;
2085
2086         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2087 }
2088
2089 sub git_get_project_config {
2090         my ($key, $type) = @_;
2091
2092         # key sanity check
2093         return unless ($key);
2094         $key =~ s/^gitweb\.//;
2095         return if ($key =~ m/\W/);
2096
2097         # type sanity check
2098         if (defined $type) {
2099                 $type =~ s/^--//;
2100                 $type = undef
2101                         unless ($type eq 'bool' || $type eq 'int');
2102         }
2103
2104         # get config
2105         if (!defined $config_file ||
2106             $config_file ne "$git_dir/config") {
2107                 %config = git_parse_project_config('gitweb');
2108                 $config_file = "$git_dir/config";
2109         }
2110
2111         # check if config variable (key) exists
2112         return unless exists $config{"gitweb.$key"};
2113
2114         # ensure given type
2115         if (!defined $type) {
2116                 return $config{"gitweb.$key"};
2117         } elsif ($type eq 'bool') {
2118                 # backward compatibility: 'git config --bool' returns true/false
2119                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2120         } elsif ($type eq 'int') {
2121                 return config_to_int($config{"gitweb.$key"});
2122         }
2123         return $config{"gitweb.$key"};
2124 }
2125
2126 # get hash of given path at given ref
2127 sub git_get_hash_by_path {
2128         my $base = shift;
2129         my $path = shift || return undef;
2130         my $type = shift;
2131
2132         $path =~ s,/+$,,;
2133
2134         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2135                 or die_error(500, "Open git-ls-tree failed");
2136         my $line = <$fd>;
2137         close $fd or return undef;
2138
2139         if (!defined $line) {
2140                 # there is no tree or hash given by $path at $base
2141                 return undef;
2142         }
2143
2144         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2145         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2146         if (defined $type && $type ne $2) {
2147                 # type doesn't match
2148                 return undef;
2149         }
2150         return $3;
2151 }
2152
2153 # get path of entry with given hash at given tree-ish (ref)
2154 # used to get 'from' filename for combined diff (merge commit) for renames
2155 sub git_get_path_by_hash {
2156         my $base = shift || return;
2157         my $hash = shift || return;
2158
2159         local $/ = "\0";
2160
2161         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2162                 or return undef;
2163         while (my $line = <$fd>) {
2164                 chomp $line;
2165
2166                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2167                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2168                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2169                         close $fd;
2170                         return $1;
2171                 }
2172         }
2173         close $fd;
2174         return undef;
2175 }
2176
2177 ## ......................................................................
2178 ## git utility functions, directly accessing git repository
2179
2180 sub git_get_project_description {
2181         my $path = shift;
2182
2183         $git_dir = "$projectroot/$path";
2184         open my $fd, '<', "$git_dir/description"
2185                 or return git_get_project_config('description');
2186         my $descr = <$fd>;
2187         close $fd;
2188         if (defined $descr) {
2189                 chomp $descr;
2190         }
2191         return $descr;
2192 }
2193
2194 sub git_get_project_ctags {
2195         my $path = shift;
2196         my $ctags = {};
2197
2198         $git_dir = "$projectroot/$path";
2199         opendir my $dh, "$git_dir/ctags"
2200                 or return $ctags;
2201         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2202                 open my $ct, '<', $_ or next;
2203                 my $val = <$ct>;
2204                 chomp $val;
2205                 close $ct;
2206                 my $ctag = $_; $ctag =~ s#.*/##;
2207                 $ctags->{$ctag} = $val;
2208         }
2209         closedir $dh;
2210         $ctags;
2211 }
2212
2213 sub git_populate_project_tagcloud {
2214         my $ctags = shift;
2215
2216         # First, merge different-cased tags; tags vote on casing
2217         my %ctags_lc;
2218         foreach (keys %$ctags) {
2219                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2220                 if (not $ctags_lc{lc $_}->{topcount}
2221                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2222                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2223                         $ctags_lc{lc $_}->{topname} = $_;
2224                 }
2225         }
2226
2227         my $cloud;
2228         if (eval { require HTML::TagCloud; 1; }) {
2229                 $cloud = HTML::TagCloud->new;
2230                 foreach (sort keys %ctags_lc) {
2231                         # Pad the title with spaces so that the cloud looks
2232                         # less crammed.
2233                         my $title = $ctags_lc{$_}->{topname};
2234                         $title =~ s/ /&nbsp;/g;
2235                         $title =~ s/^/&nbsp;/g;
2236                         $title =~ s/$/&nbsp;/g;
2237                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2238                 }
2239         } else {
2240                 $cloud = \%ctags_lc;
2241         }
2242         $cloud;
2243 }
2244
2245 sub git_show_project_tagcloud {
2246         my ($cloud, $count) = @_;
2247         print STDERR ref($cloud)."..\n";
2248         if (ref $cloud eq 'HTML::TagCloud') {
2249                 return $cloud->html_and_css($count);
2250         } else {
2251                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2252                 return '<p align="center">' . join (', ', map {
2253                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2254                 } splice(@tags, 0, $count)) . '</p>';
2255         }
2256 }
2257
2258 sub git_get_project_url_list {
2259         my $path = shift;
2260
2261         $git_dir = "$projectroot/$path";
2262         open my $fd, '<', "$git_dir/cloneurl"
2263                 or return wantarray ?
2264                 @{ config_to_multi(git_get_project_config('url')) } :
2265                    config_to_multi(git_get_project_config('url'));
2266         my @git_project_url_list = map { chomp; $_ } <$fd>;
2267         close $fd;
2268
2269         return wantarray ? @git_project_url_list : \@git_project_url_list;
2270 }
2271
2272 sub git_get_projects_list {
2273         my ($filter) = @_;
2274         my @list;
2275
2276         $filter ||= '';
2277         $filter =~ s/\.git$//;
2278
2279         my $check_forks = gitweb_check_feature('forks');
2280
2281         if (-d $projects_list) {
2282                 # search in directory
2283                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2284                 # remove the trailing "/"
2285                 $dir =~ s!/+$!!;
2286                 my $pfxlen = length("$dir");
2287                 my $pfxdepth = ($dir =~ tr!/!!);
2288
2289                 File::Find::find({
2290                         follow_fast => 1, # follow symbolic links
2291                         follow_skip => 2, # ignore duplicates
2292                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2293                         wanted => sub {
2294                                 # skip project-list toplevel, if we get it.
2295                                 return if (m!^[/.]$!);
2296                                 # only directories can be git repositories
2297                                 return unless (-d $_);
2298                                 # don't traverse too deep (Find is super slow on os x)
2299                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2300                                         $File::Find::prune = 1;
2301                                         return;
2302                                 }
2303
2304                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2305                                 # we check related file in $projectroot
2306                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2307                                 if (check_export_ok("$projectroot/$path")) {
2308                                         push @list, { path => $path };
2309                                         $File::Find::prune = 1;
2310                                 }
2311                         },
2312                 }, "$dir");
2313
2314         } elsif (-f $projects_list) {
2315                 # read from file(url-encoded):
2316                 # 'git%2Fgit.git Linus+Torvalds'
2317                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2318                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2319                 my %paths;
2320                 open my $fd, '<', $projects_list or return;
2321         PROJECT:
2322                 while (my $line = <$fd>) {
2323                         chomp $line;
2324                         my ($path, $owner) = split ' ', $line;
2325                         $path = unescape($path);
2326                         $owner = unescape($owner);
2327                         if (!defined $path) {
2328                                 next;
2329                         }
2330                         if ($filter ne '') {
2331                                 # looking for forks;
2332                                 my $pfx = substr($path, 0, length($filter));
2333                                 if ($pfx ne $filter) {
2334                                         next PROJECT;
2335                                 }
2336                                 my $sfx = substr($path, length($filter));
2337                                 if ($sfx !~ /^\/.*\.git$/) {
2338                                         next PROJECT;
2339                                 }
2340                         } elsif ($check_forks) {
2341                         PATH:
2342                                 foreach my $filter (keys %paths) {
2343                                         # looking for forks;
2344                                         my $pfx = substr($path, 0, length($filter));
2345                                         if ($pfx ne $filter) {
2346                                                 next PATH;
2347                                         }
2348                                         my $sfx = substr($path, length($filter));
2349                                         if ($sfx !~ /^\/.*\.git$/) {
2350                                                 next PATH;
2351                                         }
2352                                         # is a fork, don't include it in
2353                                         # the list
2354                                         next PROJECT;
2355                                 }
2356                         }
2357                         if (check_export_ok("$projectroot/$path")) {
2358                                 my $pr = {
2359                                         path => $path,
2360                                         owner => to_utf8($owner),
2361                                 };
2362                                 push @list, $pr;
2363                                 (my $forks_path = $path) =~ s/\.git$//;
2364                                 $paths{$forks_path}++;
2365                         }
2366                 }
2367                 close $fd;
2368         }
2369         return @list;
2370 }
2371
2372 our $gitweb_project_owner = undef;
2373 sub git_get_project_list_from_file {
2374
2375         return if (defined $gitweb_project_owner);
2376
2377         $gitweb_project_owner = {};
2378         # read from file (url-encoded):
2379         # 'git%2Fgit.git Linus+Torvalds'
2380         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2381         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2382         if (-f $projects_list) {
2383                 open(my $fd, '<', $projects_list);
2384                 while (my $line = <$fd>) {
2385                         chomp $line;
2386                         my ($pr, $ow) = split ' ', $line;
2387                         $pr = unescape($pr);
2388                         $ow = unescape($ow);
2389                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2390                 }
2391                 close $fd;
2392         }
2393 }
2394
2395 sub git_get_project_owner {
2396         my $project = shift;
2397         my $owner;
2398
2399         return undef unless $project;
2400         $git_dir = "$projectroot/$project";
2401
2402         if (!defined $gitweb_project_owner) {
2403                 git_get_project_list_from_file();
2404         }
2405
2406         if (exists $gitweb_project_owner->{$project}) {
2407                 $owner = $gitweb_project_owner->{$project};
2408         }
2409         if (!defined $owner){
2410                 $owner = git_get_project_config('owner');
2411         }
2412         if (!defined $owner) {
2413                 $owner = get_file_owner("$git_dir");
2414         }
2415
2416         return $owner;
2417 }
2418
2419 sub git_get_last_activity {
2420         my ($path) = @_;
2421         my $fd;
2422
2423         $git_dir = "$projectroot/$path";
2424         open($fd, "-|", git_cmd(), 'for-each-ref',
2425              '--format=%(committer)',
2426              '--sort=-committerdate',
2427              '--count=1',
2428              'refs/heads') or return;
2429         my $most_recent = <$fd>;
2430         close $fd or return;
2431         if (defined $most_recent &&
2432             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2433                 my $timestamp = $1;
2434                 my $age = time - $timestamp;
2435                 return ($age, age_string($age));
2436         }
2437         return (undef, undef);
2438 }
2439
2440 sub git_get_references {
2441         my $type = shift || "";
2442         my %refs;
2443         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2444         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2445         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2446                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2447                 or return;
2448
2449         while (my $line = <$fd>) {
2450                 chomp $line;
2451                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2452                         if (defined $refs{$1}) {
2453                                 push @{$refs{$1}}, $2;
2454                         } else {
2455                                 $refs{$1} = [ $2 ];
2456                         }
2457                 }
2458         }
2459         close $fd or return;
2460         return \%refs;
2461 }
2462
2463 sub git_get_rev_name_tags {
2464         my $hash = shift || return undef;
2465
2466         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2467                 or return;
2468         my $name_rev = <$fd>;
2469         close $fd;
2470
2471         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2472                 return $1;
2473         } else {
2474                 # catches also '$hash undefined' output
2475                 return undef;
2476         }
2477 }
2478
2479 ## ----------------------------------------------------------------------
2480 ## parse to hash functions
2481
2482 sub parse_date {
2483         my $epoch = shift;
2484         my $tz = shift || "-0000";
2485
2486         my %date;
2487         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2488         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2489         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2490         $date{'hour'} = $hour;
2491         $date{'minute'} = $min;
2492         $date{'mday'} = $mday;
2493         $date{'day'} = $days[$wday];
2494         $date{'month'} = $months[$mon];
2495         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2496                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2497         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2498                              $mday, $months[$mon], $hour ,$min;
2499         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2500                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2501
2502         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2503         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2504         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2505         $date{'hour_local'} = $hour;
2506         $date{'minute_local'} = $min;
2507         $date{'tz_local'} = $tz;
2508         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2509                                   1900+$year, $mon+1, $mday,
2510                                   $hour, $min, $sec, $tz);
2511         return %date;
2512 }
2513
2514 sub parse_tag {
2515         my $tag_id = shift;
2516         my %tag;
2517         my @comment;
2518
2519         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2520         $tag{'id'} = $tag_id;
2521         while (my $line = <$fd>) {
2522                 chomp $line;
2523                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2524                         $tag{'object'} = $1;
2525                 } elsif ($line =~ m/^type (.+)$/) {
2526                         $tag{'type'} = $1;
2527                 } elsif ($line =~ m/^tag (.+)$/) {
2528                         $tag{'name'} = $1;
2529                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2530                         $tag{'author'} = $1;
2531                         $tag{'author_epoch'} = $2;
2532                         $tag{'author_tz'} = $3;
2533                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2534                                 $tag{'author_name'}  = $1;
2535                                 $tag{'author_email'} = $2;
2536                         } else {
2537                                 $tag{'author_name'} = $tag{'author'};
2538                         }
2539                 } elsif ($line =~ m/--BEGIN/) {
2540                         push @comment, $line;
2541                         last;
2542                 } elsif ($line eq "") {
2543                         last;
2544                 }
2545         }
2546         push @comment, <$fd>;
2547         $tag{'comment'} = \@comment;
2548         close $fd or return;
2549         if (!defined $tag{'name'}) {
2550                 return
2551         };
2552         return %tag
2553 }
2554
2555 sub parse_commit_text {
2556         my ($commit_text, $withparents) = @_;
2557         my @commit_lines = split '\n', $commit_text;
2558         my %co;
2559
2560         pop @commit_lines; # Remove '\0'
2561
2562         if (! @commit_lines) {
2563                 return;
2564         }
2565
2566         my $header = shift @commit_lines;
2567         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2568                 return;
2569         }
2570         ($co{'id'}, my @parents) = split ' ', $header;
2571         while (my $line = shift @commit_lines) {
2572                 last if $line eq "\n";
2573                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2574                         $co{'tree'} = $1;
2575                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2576                         push @parents, $1;
2577                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2578                         $co{'author'} = $1;
2579                         $co{'author_epoch'} = $2;
2580                         $co{'author_tz'} = $3;
2581                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2582                                 $co{'author_name'}  = $1;
2583                                 $co{'author_email'} = $2;
2584                         } else {
2585                                 $co{'author_name'} = $co{'author'};
2586                         }
2587                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2588                         $co{'committer'} = $1;
2589                         $co{'committer_epoch'} = $2;
2590                         $co{'committer_tz'} = $3;
2591                         $co{'committer_name'} = $co{'committer'};
2592                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2593                                 $co{'committer_name'}  = $1;
2594                                 $co{'committer_email'} = $2;
2595                         } else {
2596                                 $co{'committer_name'} = $co{'committer'};
2597                         }
2598                 }
2599         }
2600         if (!defined $co{'tree'}) {
2601                 return;
2602         };
2603         $co{'parents'} = \@parents;
2604         $co{'parent'} = $parents[0];
2605
2606         foreach my $title (@commit_lines) {
2607                 $title =~ s/^    //;
2608                 if ($title ne "") {
2609                         $co{'title'} = chop_str($title, 80, 5);
2610                         # remove leading stuff of merges to make the interesting part visible
2611                         if (length($title) > 50) {
2612                                 $title =~ s/^Automatic //;
2613                                 $title =~ s/^merge (of|with) /Merge ... /i;
2614                                 if (length($title) > 50) {
2615                                         $title =~ s/(http|rsync):\/\///;
2616                                 }
2617                                 if (length($title) > 50) {
2618                                         $title =~ s/(master|www|rsync)\.//;
2619                                 }
2620                                 if (length($title) > 50) {
2621                                         $title =~ s/kernel.org:?//;
2622                                 }
2623                                 if (length($title) > 50) {
2624                                         $title =~ s/\/pub\/scm//;
2625                                 }
2626                         }
2627                         $co{'title_short'} = chop_str($title, 50, 5);
2628                         last;
2629                 }
2630         }
2631         if (! defined $co{'title'} || $co{'title'} eq "") {
2632                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2633         }
2634         # remove added spaces
2635         foreach my $line (@commit_lines) {
2636                 $line =~ s/^    //;
2637         }
2638         $co{'comment'} = \@commit_lines;
2639
2640         my $age = time - $co{'committer_epoch'};
2641         $co{'age'} = $age;
2642         $co{'age_string'} = age_string($age);
2643         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2644         if ($age > 60*60*24*7*2) {
2645                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2646                 $co{'age_string_age'} = $co{'age_string'};
2647         } else {
2648                 $co{'age_string_date'} = $co{'age_string'};
2649                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2650         }
2651         return %co;
2652 }
2653
2654 sub parse_commit {
2655         my ($commit_id) = @_;
2656         my %co;
2657
2658         local $/ = "\0";
2659
2660         open my $fd, "-|", git_cmd(), "rev-list",
2661                 "--parents",
2662                 "--header",
2663                 "--max-count=1",
2664                 $commit_id,
2665                 "--",
2666                 or die_error(500, "Open git-rev-list failed");
2667         %co = parse_commit_text(<$fd>, 1);
2668         close $fd;
2669
2670         return %co;
2671 }
2672
2673 sub parse_commits {
2674         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2675         my @cos;
2676
2677         $maxcount ||= 1;
2678         $skip ||= 0;
2679
2680         local $/ = "\0";
2681
2682         open my $fd, "-|", git_cmd(), "rev-list",
2683                 "--header",
2684                 @args,
2685                 ("--max-count=" . $maxcount),
2686                 ("--skip=" . $skip),
2687                 @extra_options,
2688                 $commit_id,
2689                 "--",
2690                 ($filename ? ($filename) : ())
2691                 or die_error(500, "Open git-rev-list failed");
2692         while (my $line = <$fd>) {
2693                 my %co = parse_commit_text($line);
2694                 push @cos, \%co;
2695         }
2696         close $fd;
2697
2698         return wantarray ? @cos : \@cos;
2699 }
2700
2701 # parse line of git-diff-tree "raw" output
2702 sub parse_difftree_raw_line {
2703         my $line = shift;
2704         my %res;
2705
2706         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2707         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2708         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2709                 $res{'from_mode'} = $1;
2710                 $res{'to_mode'} = $2;
2711                 $res{'from_id'} = $3;
2712                 $res{'to_id'} = $4;
2713                 $res{'status'} = $5;
2714                 $res{'similarity'} = $6;
2715                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2716                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2717                 } else {
2718                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2719                 }
2720         }
2721         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2722         # combined diff (for merge commit)
2723         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2724                 $res{'nparents'}  = length($1);
2725                 $res{'from_mode'} = [ split(' ', $2) ];
2726                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2727                 $res{'from_id'} = [ split(' ', $3) ];
2728                 $res{'to_id'} = pop @{$res{'from_id'}};
2729                 $res{'status'} = [ split('', $4) ];
2730                 $res{'to_file'} = unquote($5);
2731         }
2732         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2733         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2734                 $res{'commit'} = $1;
2735         }
2736
2737         return wantarray ? %res : \%res;
2738 }
2739
2740 # wrapper: return parsed line of git-diff-tree "raw" output
2741 # (the argument might be raw line, or parsed info)
2742 sub parsed_difftree_line {
2743         my $line_or_ref = shift;
2744
2745         if (ref($line_or_ref) eq "HASH") {
2746                 # pre-parsed (or generated by hand)
2747                 return $line_or_ref;
2748         } else {
2749                 return parse_difftree_raw_line($line_or_ref);
2750         }
2751 }
2752
2753 # parse line of git-ls-tree output
2754 sub parse_ls_tree_line {
2755         my $line = shift;
2756         my %opts = @_;
2757         my %res;
2758
2759         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2760         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2761
2762         $res{'mode'} = $1;
2763         $res{'type'} = $2;
2764         $res{'hash'} = $3;
2765         if ($opts{'-z'}) {
2766                 $res{'name'} = $4;
2767         } else {
2768                 $res{'name'} = unquote($4);
2769         }
2770
2771         return wantarray ? %res : \%res;
2772 }
2773
2774 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2775 sub parse_from_to_diffinfo {
2776         my ($diffinfo, $from, $to, @parents) = @_;
2777
2778         if ($diffinfo->{'nparents'}) {
2779                 # combined diff
2780                 $from->{'file'} = [];
2781                 $from->{'href'} = [];
2782                 fill_from_file_info($diffinfo, @parents)
2783                         unless exists $diffinfo->{'from_file'};
2784                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2785                         $from->{'file'}[$i] =
2786                                 defined $diffinfo->{'from_file'}[$i] ?
2787                                         $diffinfo->{'from_file'}[$i] :
2788                                         $diffinfo->{'to_file'};
2789                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2790                                 $from->{'href'}[$i] = href(action=>"blob",
2791                                                            hash_base=>$parents[$i],
2792                                                            hash=>$diffinfo->{'from_id'}[$i],
2793                                                            file_name=>$from->{'file'}[$i]);
2794                         } else {
2795                                 $from->{'href'}[$i] = undef;
2796                         }
2797                 }
2798         } else {
2799                 # ordinary (not combined) diff
2800                 $from->{'file'} = $diffinfo->{'from_file'};
2801                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2802                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2803                                                hash=>$diffinfo->{'from_id'},
2804                                                file_name=>$from->{'file'});
2805                 } else {
2806                         delete $from->{'href'};
2807                 }
2808         }
2809
2810         $to->{'file'} = $diffinfo->{'to_file'};
2811         if (!is_deleted($diffinfo)) { # file exists in result
2812                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2813                                      hash=>$diffinfo->{'to_id'},
2814                                      file_name=>$to->{'file'});
2815         } else {
2816                 delete $to->{'href'};
2817         }
2818 }
2819
2820 ## ......................................................................
2821 ## parse to array of hashes functions
2822
2823 sub git_get_heads_list {
2824         my $limit = shift;
2825         my @headslist;
2826
2827         open my $fd, '-|', git_cmd(), 'for-each-ref',
2828                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2829                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2830                 'refs/heads'
2831                 or return;
2832         while (my $line = <$fd>) {
2833                 my %ref_item;
2834
2835                 chomp $line;
2836                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2837                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2838                 my ($committer, $epoch, $tz) =
2839                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2840                 $ref_item{'fullname'}  = $name;
2841                 $name =~ s!^refs/heads/!!;
2842
2843                 $ref_item{'name'}  = $name;
2844                 $ref_item{'id'}    = $hash;
2845                 $ref_item{'title'} = $title || '(no commit message)';
2846                 $ref_item{'epoch'} = $epoch;
2847                 if ($epoch) {
2848                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2849                 } else {
2850                         $ref_item{'age'} = "unknown";
2851                 }
2852
2853                 push @headslist, \%ref_item;
2854         }
2855         close $fd;
2856
2857         return wantarray ? @headslist : \@headslist;
2858 }
2859
2860 sub git_get_tags_list {
2861         my $limit = shift;
2862         my @tagslist;
2863
2864         open my $fd, '-|', git_cmd(), 'for-each-ref',
2865                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2866                 '--format=%(objectname) %(objecttype) %(refname) '.
2867                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2868                 'refs/tags'
2869                 or return;
2870         while (my $line = <$fd>) {
2871                 my %ref_item;
2872
2873                 chomp $line;
2874                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2875                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2876                 my ($creator, $epoch, $tz) =
2877                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2878                 $ref_item{'fullname'} = $name;
2879                 $name =~ s!^refs/tags/!!;
2880
2881                 $ref_item{'type'} = $type;
2882                 $ref_item{'id'} = $id;
2883                 $ref_item{'name'} = $name;
2884                 if ($type eq "tag") {
2885                         $ref_item{'subject'} = $title;
2886                         $ref_item{'reftype'} = $reftype;
2887                         $ref_item{'refid'}   = $refid;
2888                 } else {
2889                         $ref_item{'reftype'} = $type;
2890                         $ref_item{'refid'}   = $id;
2891                 }
2892
2893                 if ($type eq "tag" || $type eq "commit") {
2894                         $ref_item{'epoch'} = $epoch;
2895                         if ($epoch) {
2896                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2897                         } else {
2898                                 $ref_item{'age'} = "unknown";
2899                         }
2900                 }
2901
2902                 push @tagslist, \%ref_item;
2903         }
2904         close $fd;
2905
2906         return wantarray ? @tagslist : \@tagslist;
2907 }
2908
2909 ## ----------------------------------------------------------------------
2910 ## filesystem-related functions
2911
2912 sub get_file_owner {
2913         my $path = shift;
2914
2915         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2916         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2917         if (!defined $gcos) {
2918                 return undef;
2919         }
2920         my $owner = $gcos;
2921         $owner =~ s/[,;].*$//;
2922         return to_utf8($owner);
2923 }
2924
2925 # assume that file exists
2926 sub insert_file {
2927         my $filename = shift;
2928
2929         open my $fd, '<', $filename;
2930         print map { to_utf8($_) } <$fd>;
2931         close $fd;
2932 }
2933
2934 ## ......................................................................
2935 ## mimetype related functions
2936
2937 sub mimetype_guess_file {
2938         my $filename = shift;
2939         my $mimemap = shift;
2940         -r $mimemap or return undef;
2941
2942         my %mimemap;
2943         open(my $mh, '<', $mimemap) or return undef;
2944         while (<$mh>) {
2945                 next if m/^#/; # skip comments
2946                 my ($mimetype, $exts) = split(/\t+/);
2947                 if (defined $exts) {
2948                         my @exts = split(/\s+/, $exts);
2949                         foreach my $ext (@exts) {
2950                                 $mimemap{$ext} = $mimetype;
2951                         }
2952                 }
2953         }
2954         close($mh);
2955
2956         $filename =~ /\.([^.]*)$/;
2957         return $mimemap{$1};
2958 }
2959
2960 sub mimetype_guess {
2961         my $filename = shift;
2962         my $mime;
2963         $filename =~ /\./ or return undef;
2964
2965         if ($mimetypes_file) {
2966                 my $file = $mimetypes_file;
2967                 if ($file !~ m!^/!) { # if it is relative path
2968                         # it is relative to project
2969                         $file = "$projectroot/$project/$file";
2970                 }
2971                 $mime = mimetype_guess_file($filename, $file);
2972         }
2973         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2974         return $mime;
2975 }
2976
2977 sub blob_mimetype {
2978         my $fd = shift;
2979         my $filename = shift;
2980
2981         if ($filename) {
2982                 my $mime = mimetype_guess($filename);
2983                 $mime and return $mime;
2984         }
2985
2986         # just in case
2987         return $default_blob_plain_mimetype unless $fd;
2988
2989         if (-T $fd) {
2990                 return 'text/plain';
2991         } elsif (! $filename) {
2992                 return 'application/octet-stream';
2993         } elsif ($filename =~ m/\.png$/i) {
2994                 return 'image/png';
2995         } elsif ($filename =~ m/\.gif$/i) {
2996                 return 'image/gif';
2997         } elsif ($filename =~ m/\.jpe?g$/i) {
2998                 return 'image/jpeg';
2999         } else {
3000                 return 'application/octet-stream';
3001         }
3002 }
3003
3004 sub blob_contenttype {
3005         my ($fd, $file_name, $type) = @_;
3006
3007         $type ||= blob_mimetype($fd, $file_name);
3008         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3009                 $type .= "; charset=$default_text_plain_charset";
3010         }
3011
3012         return $type;
3013 }
3014
3015 ## ======================================================================
3016 ## functions printing HTML: header, footer, error page
3017
3018 sub git_header_html {
3019         my $status = shift || "200 OK";
3020         my $expires = shift;
3021
3022         my $title = "$site_name";
3023         if (defined $project) {
3024                 $title .= " - " . to_utf8($project);
3025                 if (defined $action) {
3026                         $title .= "/$action";
3027                         if (defined $file_name) {
3028                                 $title .= " - " . esc_path($file_name);
3029                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3030                                         $title .= "/";
3031                                 }
3032                         }
3033                 }
3034         }
3035         my $content_type;
3036         # require explicit support from the UA if we are to send the page as
3037         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3038         # we have to do this because MSIE sometimes globs '*/*', pretending to
3039         # support xhtml+xml but choking when it gets what it asked for.
3040         if (defined $cgi->http('HTTP_ACCEPT') &&
3041             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3042             $cgi->Accept('application/xhtml+xml') != 0) {
3043                 $content_type = 'application/xhtml+xml';
3044         } else {
3045                 $content_type = 'text/html';
3046         }
3047         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3048                            -status=> $status, -expires => $expires);
3049         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3050         print <<EOF;
3051 <?xml version="1.0" encoding="utf-8"?>
3052 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3053 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3054 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3055 <!-- git core binaries version $git_version -->
3056 <head>
3057 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3058 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3059 <meta name="robots" content="index, nofollow"/>
3060 <title>$title</title>
3061 EOF
3062         # the stylesheet, favicon etc urls won't work correctly with path_info
3063         # unless we set the appropriate base URL
3064         if ($ENV{'PATH_INFO'}) {
3065                 print "<base href=\"".esc_url($base_url)."\" />\n";
3066         }
3067         # print out each stylesheet that exist, providing backwards capability
3068         # for those people who defined $stylesheet in a config file
3069         if (defined $stylesheet) {
3070                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3071         } else {
3072                 foreach my $stylesheet (@stylesheets) {
3073                         next unless $stylesheet;
3074                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3075                 }
3076         }
3077         if (defined $project) {
3078                 my %href_params = get_feed_info();
3079                 if (!exists $href_params{'-title'}) {
3080                         $href_params{'-title'} = 'log';
3081                 }
3082
3083                 foreach my $format qw(RSS Atom) {
3084                         my $type = lc($format);
3085                         my %link_attr = (
3086                                 '-rel' => 'alternate',
3087                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3088                                 '-type' => "application/$type+xml"
3089                         );
3090
3091                         $href_params{'action'} = $type;
3092                         $link_attr{'-href'} = href(%href_params);
3093                         print "<link ".
3094                               "rel=\"$link_attr{'-rel'}\" ".
3095                               "title=\"$link_attr{'-title'}\" ".
3096                               "href=\"$link_attr{'-href'}\" ".
3097                               "type=\"$link_attr{'-type'}\" ".
3098                               "/>\n";
3099
3100                         $href_params{'extra_options'} = '--no-merges';
3101                         $link_attr{'-href'} = href(%href_params);
3102                         $link_attr{'-title'} .= ' (no merges)';
3103                         print "<link ".
3104                               "rel=\"$link_attr{'-rel'}\" ".
3105                               "title=\"$link_attr{'-title'}\" ".
3106                               "href=\"$link_attr{'-href'}\" ".
3107                               "type=\"$link_attr{'-type'}\" ".
3108                               "/>\n";
3109                 }
3110
3111         } else {
3112                 printf('<link rel="alternate" title="%s projects list" '.
3113                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3114                        $site_name, href(project=>undef, action=>"project_index"));
3115                 printf('<link rel="alternate" title="%s projects feeds" '.
3116                        'href="%s" type="text/x-opml" />'."\n",
3117                        $site_name, href(project=>undef, action=>"opml"));
3118         }
3119         if (defined $favicon) {
3120                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3121         }
3122
3123         print "</head>\n" .
3124               "<body>\n";
3125
3126         if (-f $site_header) {
3127                 insert_file($site_header);
3128         }
3129
3130         print "<div class=\"page_header\">\n" .
3131               $cgi->a({-href => esc_url($logo_url),
3132                        -title => $logo_label},
3133                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3134         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3135         if (defined $project) {
3136                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3137                 if (defined $action) {
3138                         print " / $action";
3139                 }
3140                 print "\n";
3141         }
3142         print "</div>\n";
3143
3144         my $have_search = gitweb_check_feature('search');
3145         if (defined $project && $have_search) {
3146                 if (!defined $searchtext) {
3147                         $searchtext = "";
3148                 }
3149                 my $search_hash;
3150                 if (defined $hash_base) {
3151                         $search_hash = $hash_base;
3152                 } elsif (defined $hash) {
3153                         $search_hash = $hash;
3154                 } else {
3155                         $search_hash = "HEAD";
3156                 }
3157                 my $action = $my_uri;
3158                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3159                 if ($use_pathinfo) {
3160                         $action .= "/".esc_url($project);
3161                 }
3162                 print $cgi->startform(-method => "get", -action => $action) .
3163                       "<div class=\"search\">\n" .
3164                       (!$use_pathinfo &&
3165                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3166                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3167                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3168                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3169                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3170                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3171                       " search:\n",
3172                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3173                       "<span title=\"Extended regular expression\">" .
3174                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3175                                      -checked => $search_use_regexp) .
3176                       "</span>" .
3177                       "</div>" .
3178                       $cgi->end_form() . "\n";
3179         }
3180 }
3181
3182 sub git_footer_html {
3183         my $feed_class = 'rss_logo';
3184
3185         print "<div class=\"page_footer\">\n";
3186         if (defined $project) {
3187                 my $descr = git_get_project_description($project);
3188                 if (defined $descr) {
3189                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3190                 }
3191
3192                 my %href_params = get_feed_info();
3193                 if (!%href_params) {
3194                         $feed_class .= ' generic';
3195                 }
3196                 $href_params{'-title'} ||= 'log';
3197
3198                 foreach my $format qw(RSS Atom) {
3199                         $href_params{'action'} = lc($format);
3200                         print $cgi->a({-href => href(%href_params),
3201                                       -title => "$href_params{'-title'} $format feed",
3202                                       -class => $feed_class}, $format)."\n";
3203                 }
3204
3205         } else {
3206                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3207                               -class => $feed_class}, "OPML") . " ";
3208                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3209                               -class => $feed_class}, "TXT") . "\n";
3210         }
3211         print "</div>\n"; # class="page_footer"
3212
3213         if (-f $site_footer) {
3214                 insert_file($site_footer);
3215         }
3216
3217         print "</body>\n" .
3218               "</html>";
3219 }
3220
3221 # die_error(<http_status_code>, <error_message>)
3222 # Example: die_error(404, 'Hash not found')
3223 # By convention, use the following status codes (as defined in RFC 2616):
3224 # 400: Invalid or missing CGI parameters, or
3225 #      requested object exists but has wrong type.
3226 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3227 #      this server or project.
3228 # 404: Requested object/revision/project doesn't exist.
3229 # 500: The server isn't configured properly, or
3230 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3231 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3232 sub die_error {
3233         my $status = shift || 500;
3234         my $error = shift || "Internal server error";
3235
3236         my %http_responses = (400 => '400 Bad Request',
3237                               403 => '403 Forbidden',
3238                               404 => '404 Not Found',
3239                               500 => '500 Internal Server Error');
3240         git_header_html($http_responses{$status});
3241         print <<EOF;
3242 <div class="page_body">
3243 <br /><br />
3244 $status - $error
3245 <br />
3246 </div>
3247 EOF
3248         git_footer_html();
3249         exit;
3250 }
3251
3252 ## ----------------------------------------------------------------------
3253 ## functions printing or outputting HTML: navigation
3254
3255 sub git_print_page_nav {
3256         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3257         $extra = '' if !defined $extra; # pager or formats
3258
3259         my @navs = qw(summary shortlog log commit commitdiff tree);
3260         if ($suppress) {
3261                 @navs = grep { $_ ne $suppress } @navs;
3262         }
3263
3264         my %arg = map { $_ => {action=>$_} } @navs;
3265         if (defined $head) {
3266                 for (qw(commit commitdiff)) {
3267                         $arg{$_}{'hash'} = $head;
3268                 }
3269                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3270                         for (qw(shortlog log)) {
3271                                 $arg{$_}{'hash'} = $head;
3272                         }
3273                 }
3274         }
3275
3276         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3277         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3278
3279         my @actions = gitweb_get_feature('actions');
3280         my %repl = (
3281                 '%' => '%',
3282                 'n' => $project,         # project name
3283                 'f' => $git_dir,         # project path within filesystem
3284                 'h' => $treehead || '',  # current hash ('h' parameter)
3285                 'b' => $treebase || '',  # hash base ('hb' parameter)
3286         );
3287         while (@actions) {
3288                 my ($label, $link, $pos) = splice(@actions,0,3);
3289                 # insert
3290                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3291                 # munch munch
3292                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3293                 $arg{$label}{'_href'} = $link;
3294         }
3295
3296         print "<div class=\"page_nav\">\n" .
3297                 (join " | ",
3298                  map { $_ eq $current ?
3299                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3300                  } @navs);
3301         print "<br/>\n$extra<br/>\n" .
3302               "</div>\n";
3303 }
3304
3305 sub format_paging_nav {
3306         my ($action, $hash, $head, $page, $has_next_link) = @_;
3307         my $paging_nav;
3308
3309
3310         if ($hash ne $head || $page) {
3311                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3312         } else {
3313                 $paging_nav .= "HEAD";
3314         }
3315
3316         if ($page > 0) {
3317                 $paging_nav .= " &sdot; " .
3318                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3319                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3320         } else {
3321                 $paging_nav .= " &sdot; prev";
3322         }
3323
3324         if ($has_next_link) {
3325                 $paging_nav .= " &sdot; " .
3326                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3327                                  -accesskey => "n", -title => "Alt-n"}, "next");
3328         } else {
3329                 $paging_nav .= " &sdot; next";
3330         }
3331
3332         return $paging_nav;
3333 }
3334
3335 ## ......................................................................
3336 ## functions printing or outputting HTML: div
3337
3338 sub git_print_header_div {
3339         my ($action, $title, $hash, $hash_base) = @_;
3340         my %args = ();
3341
3342         $args{'action'} = $action;
3343         $args{'hash'} = $hash if $hash;
3344         $args{'hash_base'} = $hash_base if $hash_base;
3345
3346         print "<div class=\"header\">\n" .
3347               $cgi->a({-href => href(%args), -class => "title"},
3348               $title ? $title : $action) .
3349               "\n</div>\n";
3350 }
3351
3352 sub print_local_time {
3353         my %date = @_;
3354         if ($date{'hour_local'} < 6) {
3355                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3356                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3357         } else {
3358                 printf(" (%02d:%02d %s)",
3359                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3360         }
3361 }
3362
3363 # Outputs the author name and date in long form
3364 sub git_print_authorship {
3365         my $co = shift;
3366         my %opts = @_;
3367         my $tag = $opts{-tag} || 'div';
3368
3369         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3370         print "<$tag class=\"author_date\">" .
3371               esc_html($co->{'author_name'}) .
3372               " [$ad{'rfc2822'}";
3373         print_local_time(%ad) if ($opts{-localtime});
3374         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3375                   . "</$tag>\n";
3376 }
3377
3378 # Outputs table rows containing the full author or committer information,
3379 # in the format expected for 'commit' view (& similia).
3380 # Parameters are a commit hash reference, followed by the list of people
3381 # to output information for. If the list is empty it defalts to both
3382 # author and committer.
3383 sub git_print_authorship_rows {
3384         my $co = shift;
3385         # too bad we can't use @people = @_ || ('author', 'committer')
3386         my @people = @_;
3387         @people = ('author', 'committer') unless @people;
3388         foreach my $who (@people) {
3389                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3390                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3391                       "<td rowspan=\"2\">" .
3392                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3393                       "</td></tr>\n" .
3394                       "<tr>" .
3395                       "<td></td><td> $wd{'rfc2822'}";
3396                 print_local_time(%wd);
3397                 print "</td>" .
3398                       "</tr>\n";
3399         }
3400 }
3401
3402 sub git_print_page_path {
3403         my $name = shift;
3404         my $type = shift;
3405         my $hb = shift;
3406
3407
3408         print "<div class=\"page_path\">";
3409         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3410                       -title => 'tree root'}, to_utf8("[$project]"));
3411         print " / ";
3412         if (defined $name) {
3413                 my @dirname = split '/', $name;
3414                 my $basename = pop @dirname;
3415                 my $fullname = '';
3416
3417                 foreach my $dir (@dirname) {
3418                         $fullname .= ($fullname ? '/' : '') . $dir;
3419                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3420                                                      hash_base=>$hb),
3421                                       -title => $fullname}, esc_path($dir));
3422                         print " / ";
3423                 }
3424                 if (defined $type && $type eq 'blob') {
3425                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3426                                                      hash_base=>$hb),
3427                                       -title => $name}, esc_path($basename));
3428                 } elsif (defined $type && $type eq 'tree') {
3429                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3430                                                      hash_base=>$hb),
3431                                       -title => $name}, esc_path($basename));
3432                         print " / ";
3433                 } else {
3434                         print esc_path($basename);
3435                 }
3436         }
3437         print "<br/></div>\n";
3438 }
3439
3440 sub git_print_log {
3441         my $log = shift;
3442         my %opts = @_;
3443
3444         if ($opts{'-remove_title'}) {
3445                 # remove title, i.e. first line of log
3446                 shift @$log;
3447         }
3448         # remove leading empty lines
3449         while (defined $log->[0] && $log->[0] eq "") {
3450                 shift @$log;
3451         }
3452
3453         # print log
3454         my $signoff = 0;
3455         my $empty = 0;
3456         foreach my $line (@$log) {
3457                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3458                         $signoff = 1;
3459                         $empty = 0;
3460                         if (! $opts{'-remove_signoff'}) {
3461                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3462                                 next;
3463                         } else {
3464                                 # remove signoff lines
3465                                 next;
3466                         }
3467                 } else {
3468                         $signoff = 0;
3469                 }
3470
3471                 # print only one empty line
3472                 # do not print empty line after signoff
3473                 if ($line eq "") {
3474                         next if ($empty || $signoff);
3475                         $empty = 1;
3476                 } else {
3477                         $empty = 0;
3478                 }
3479
3480                 print format_log_line_html($line) . "<br/>\n";
3481         }
3482
3483         if ($opts{'-final_empty_line'}) {
3484                 # end with single empty line
3485                 print "<br/>\n" unless $empty;
3486         }
3487 }
3488
3489 # return link target (what link points to)
3490 sub git_get_link_target {
3491         my $hash = shift;
3492         my $link_target;
3493
3494         # read link
3495         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3496                 or return;
3497         {
3498                 local $/ = undef;
3499                 $link_target = <$fd>;
3500         }
3501         close $fd
3502                 or return;
3503
3504         return $link_target;
3505 }
3506
3507 # given link target, and the directory (basedir) the link is in,
3508 # return target of link relative to top directory (top tree);
3509 # return undef if it is not possible (including absolute links).
3510 sub normalize_link_target {
3511         my ($link_target, $basedir) = @_;
3512
3513         # absolute symlinks (beginning with '/') cannot be normalized
3514         return if (substr($link_target, 0, 1) eq '/');
3515
3516         # normalize link target to path from top (root) tree (dir)
3517         my $path;
3518         if ($basedir) {
3519                 $path = $basedir . '/' . $link_target;
3520         } else {
3521                 # we are in top (root) tree (dir)
3522                 $path = $link_target;
3523         }
3524
3525         # remove //, /./, and /../
3526         my @path_parts;
3527         foreach my $part (split('/', $path)) {
3528                 # discard '.' and ''
3529                 next if (!$part || $part eq '.');
3530                 # handle '..'
3531                 if ($part eq '..') {
3532                         if (@path_parts) {
3533                                 pop @path_parts;
3534                         } else {
3535                                 # link leads outside repository (outside top dir)
3536                                 return;
3537                         }
3538                 } else {
3539                         push @path_parts, $part;
3540                 }
3541         }
3542         $path = join('/', @path_parts);
3543
3544         return $path;
3545 }
3546
3547 # print tree entry (row of git_tree), but without encompassing <tr> element
3548 sub git_print_tree_entry {
3549         my ($t, $basedir, $hash_base, $have_blame) = @_;
3550
3551         my %base_key = ();
3552         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3553
3554         # The format of a table row is: mode list link.  Where mode is
3555         # the mode of the entry, list is the name of the entry, an href,
3556         # and link is the action links of the entry.
3557
3558         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3559         if ($t->{'type'} eq "blob") {
3560                 print "<td class=\"list\">" .
3561                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3562                                                file_name=>"$basedir$t->{'name'}", %base_key),
3563                                 -class => "list"}, esc_path($t->{'name'}));
3564                 if (S_ISLNK(oct $t->{'mode'})) {
3565                         my $link_target = git_get_link_target($t->{'hash'});
3566                         if ($link_target) {
3567                                 my $norm_target = normalize_link_target($link_target, $basedir);
3568                                 if (defined $norm_target) {
3569                                         print " -> " .
3570                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3571                                                                      file_name=>$norm_target),
3572                                                        -title => $norm_target}, esc_path($link_target));
3573                                 } else {
3574                                         print " -> " . esc_path($link_target);
3575                                 }
3576                         }
3577                 }
3578                 print "</td>\n";
3579                 print "<td class=\"link\">";
3580                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3581                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3582                               "blob");
3583                 if ($have_blame) {
3584                         print " | " .
3585                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3586                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3587                                       "blame");
3588                 }
3589                 if (defined $hash_base) {
3590                         print " | " .
3591                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3592                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3593                                       "history");
3594                 }
3595                 print " | " .
3596                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3597                                                file_name=>"$basedir$t->{'name'}")},
3598                                 "raw");
3599                 print "</td>\n";
3600
3601         } elsif ($t->{'type'} eq "tree") {
3602                 print "<td class=\"list\">";
3603                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3604                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3605                               esc_path($t->{'name'}));
3606                 print "</td>\n";
3607                 print "<td class=\"link\">";
3608                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3609                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3610                               "tree");
3611                 if (defined $hash_base) {
3612                         print " | " .
3613                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3614                                                      file_name=>"$basedir$t->{'name'}")},
3615                                       "history");
3616                 }
3617                 print "</td>\n";
3618         } else {
3619                 # unknown object: we can only present history for it
3620                 # (this includes 'commit' object, i.e. submodule support)
3621                 print "<td class=\"list\">" .
3622                       esc_path($t->{'name'}) .
3623                       "</td>\n";
3624                 print "<td class=\"link\">";
3625                 if (defined $hash_base) {
3626                         print $cgi->a({-href => href(action=>"history",
3627                                                      hash_base=>$hash_base,
3628                                                      file_name=>"$basedir$t->{'name'}")},
3629                                       "history");
3630                 }
3631                 print "</td>\n";
3632         }
3633 }
3634
3635 ## ......................................................................
3636 ## functions printing large fragments of HTML
3637
3638 # get pre-image filenames for merge (combined) diff
3639 sub fill_from_file_info {
3640         my ($diff, @parents) = @_;
3641
3642         $diff->{'from_file'} = [ ];
3643         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3644         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3645                 if ($diff->{'status'}[$i] eq 'R' ||
3646                     $diff->{'status'}[$i] eq 'C') {
3647                         $diff->{'from_file'}[$i] =
3648                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3649                 }
3650         }
3651
3652         return $diff;
3653 }
3654
3655 # is current raw difftree line of file deletion
3656 sub is_deleted {
3657         my $diffinfo = shift;
3658
3659         return $diffinfo->{'to_id'} eq ('0' x 40);
3660 }
3661
3662 # does patch correspond to [previous] difftree raw line
3663 # $diffinfo  - hashref of parsed raw diff format
3664 # $patchinfo - hashref of parsed patch diff format
3665 #              (the same keys as in $diffinfo)
3666 sub is_patch_split {
3667         my ($diffinfo, $patchinfo) = @_;
3668
3669         return defined $diffinfo && defined $patchinfo
3670                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3671 }
3672
3673
3674 sub git_difftree_body {
3675         my ($difftree, $hash, @parents) = @_;
3676         my ($parent) = $parents[0];
3677         my $have_blame = gitweb_check_feature('blame');
3678         print "<div class=\"list_head\">\n";
3679         if ($#{$difftree} > 10) {
3680                 print(($#{$difftree} + 1) . " files changed:\n");
3681         }
3682         print "</div>\n";
3683
3684         print "<table class=\"" .
3685               (@parents > 1 ? "combined " : "") .
3686               "diff_tree\">\n";
3687
3688         # header only for combined diff in 'commitdiff' view
3689         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3690         if ($has_header) {
3691                 # table header
3692                 print "<thead><tr>\n" .
3693                        "<th></th><th></th>\n"; # filename, patchN link
3694                 for (my $i = 0; $i < @parents; $i++) {
3695                         my $par = $parents[$i];
3696                         print "<th>" .
3697                               $cgi->a({-href => href(action=>"commitdiff",
3698                                                      hash=>$hash, hash_parent=>$par),
3699                                        -title => 'commitdiff to parent number ' .
3700                                                   ($i+1) . ': ' . substr($par,0,7)},
3701                                       $i+1) .
3702                               "&nbsp;</th>\n";
3703                 }
3704                 print "</tr></thead>\n<tbody>\n";
3705         }
3706
3707         my $alternate = 1;
3708         my $patchno = 0;
3709         foreach my $line (@{$difftree}) {
3710                 my $diff = parsed_difftree_line($line);
3711
3712                 if ($alternate) {
3713                         print "<tr class=\"dark\">\n";
3714                 } else {
3715                         print "<tr class=\"light\">\n";
3716                 }
3717                 $alternate ^= 1;
3718
3719                 if (exists $diff->{'nparents'}) { # combined diff
3720
3721                         fill_from_file_info($diff, @parents)
3722                                 unless exists $diff->{'from_file'};
3723
3724                         if (!is_deleted($diff)) {
3725                                 # file exists in the result (child) commit
3726                                 print "<td>" .
3727                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3728                                                              file_name=>$diff->{'to_file'},
3729                                                              hash_base=>$hash),
3730                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3731                                       "</td>\n";
3732                         } else {
3733                                 print "<td>" .
3734                                       esc_path($diff->{'to_file'}) .
3735                                       "</td>\n";
3736                         }
3737
3738                         if ($action eq 'commitdiff') {
3739                                 # link to patch
3740                                 $patchno++;
3741                                 print "<td class=\"link\">" .
3742                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3743                                       " | " .
3744                                       "</td>\n";
3745                         }
3746
3747                         my $has_history = 0;
3748                         my $not_deleted = 0;
3749                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3750                                 my $hash_parent = $parents[$i];
3751                                 my $from_hash = $diff->{'from_id'}[$i];
3752                                 my $from_path = $diff->{'from_file'}[$i];
3753                                 my $status = $diff->{'status'}[$i];
3754
3755                                 $has_history ||= ($status ne 'A');
3756                                 $not_deleted ||= ($status ne 'D');
3757
3758                                 if ($status eq 'A') {
3759                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3760                                 } elsif ($status eq 'D') {
3761                                         print "<td class=\"link\">" .
3762                                               $cgi->a({-href => href(action=>"blob",
3763                                                                      hash_base=>$hash,
3764                                                                      hash=>$from_hash,
3765                                                                      file_name=>$from_path)},
3766                                                       "blob" . ($i+1)) .
3767                                               " | </td>\n";
3768                                 } else {
3769                                         if ($diff->{'to_id'} eq $from_hash) {
3770                                                 print "<td class=\"link nochange\">";
3771                                         } else {
3772                                                 print "<td class=\"link\">";
3773                                         }
3774                                         print $cgi->a({-href => href(action=>"blobdiff",
3775                                                                      hash=>$diff->{'to_id'},
3776                                                                      hash_parent=>$from_hash,
3777                                                                      hash_base=>$hash,
3778                                                                      hash_parent_base=>$hash_parent,
3779                                                                      file_name=>$diff->{'to_file'},
3780                                                                      file_parent=>$from_path)},
3781                                                       "diff" . ($i+1)) .
3782                                               " | </td>\n";
3783                                 }
3784                         }
3785
3786                         print "<td class=\"link\">";
3787                         if ($not_deleted) {
3788                                 print $cgi->a({-href => href(action=>"blob",
3789                                                              hash=>$diff->{'to_id'},
3790                                                              file_name=>$diff->{'to_file'},
3791                                                              hash_base=>$hash)},
3792                                               "blob");
3793                                 print " | " if ($has_history);
3794                         }
3795                         if ($has_history) {
3796                                 print $cgi->a({-href => href(action=>"history",
3797                                                              file_name=>$diff->{'to_file'},
3798                                                              hash_base=>$hash)},
3799                                               "history");
3800                         }
3801                         print "</td>\n";
3802
3803                         print "</tr>\n";
3804                         next; # instead of 'else' clause, to avoid extra indent
3805                 }
3806                 # else ordinary diff
3807
3808                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3809                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3810                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3811                         $to_mode_oct = oct $diff->{'to_mode'};
3812                         if (S_ISREG($to_mode_oct)) { # only for regular file
3813                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3814                         }
3815                         $to_file_type = file_type($diff->{'to_mode'});
3816                 }
3817                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3818                         $from_mode_oct = oct $diff->{'from_mode'};
3819                         if (S_ISREG($to_mode_oct)) { # only for regular file
3820                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3821                         }
3822                         $from_file_type = file_type($diff->{'from_mode'});
3823                 }
3824
3825                 if ($diff->{'status'} eq "A") { # created
3826                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3827                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3828                         $mode_chng   .= "]</span>";
3829                         print "<td>";
3830                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3831                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3832                                       -class => "list"}, esc_path($diff->{'file'}));
3833                         print "</td>\n";
3834                         print "<td>$mode_chng</td>\n";
3835                         print "<td class=\"link\">";
3836                         if ($action eq 'commitdiff') {
3837                                 # link to patch
3838                                 $patchno++;
3839                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3840                                 print " | ";
3841                         }
3842                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3843                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3844                                       "blob");
3845                         print "</td>\n";
3846
3847                 } elsif ($diff->{'status'} eq "D") { # deleted
3848                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3849                         print "<td>";
3850                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3851                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3852                                        -class => "list"}, esc_path($diff->{'file'}));
3853                         print "</td>\n";
3854                         print "<td>$mode_chng</td>\n";
3855                         print "<td class=\"link\">";
3856                         if ($action eq 'commitdiff') {
3857                                 # link to patch
3858                                 $patchno++;
3859                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3860                                 print " | ";
3861                         }
3862                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3863                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3864                                       "blob") . " | ";
3865                         if ($have_blame) {
3866                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3867                                                              file_name=>$diff->{'file'})},
3868                                               "blame") . " | ";
3869                         }
3870                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3871                                                      file_name=>$diff->{'file'})},
3872                                       "history");
3873                         print "</td>\n";
3874
3875                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3876                         my $mode_chnge = "";
3877                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3878                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3879                                 if ($from_file_type ne $to_file_type) {
3880                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3881                                 }
3882                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3883                                         if ($from_mode_str && $to_mode_str) {
3884                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3885                                         } elsif ($to_mode_str) {
3886                                                 $mode_chnge .= " mode: $to_mode_str";
3887                                         }
3888                                 }
3889                                 $mode_chnge .= "]</span>\n";
3890                         }
3891                         print "<td>";
3892                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3893                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3894                                       -class => "list"}, esc_path($diff->{'file'}));
3895                         print "</td>\n";
3896                         print "<td>$mode_chnge</td>\n";
3897                         print "<td class=\"link\">";
3898                         if ($action eq 'commitdiff') {
3899                                 # link to patch
3900                                 $patchno++;
3901                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3902                                       " | ";
3903                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3904                                 # "commit" view and modified file (not onlu mode changed)
3905                                 print $cgi->a({-href => href(action=>"blobdiff",
3906                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3907                                                              hash_base=>$hash, hash_parent_base=>$parent,
3908                                                              file_name=>$diff->{'file'})},
3909                                               "diff") .
3910                                       " | ";
3911                         }
3912                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3913                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3914                                        "blob") . " | ";
3915                         if ($have_blame) {
3916                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3917                                                              file_name=>$diff->{'file'})},
3918                                               "blame") . " | ";
3919                         }
3920                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3921                                                      file_name=>$diff->{'file'})},
3922                                       "history");
3923                         print "</td>\n";
3924
3925                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3926                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3927                         my $nstatus = $status_name{$diff->{'status'}};
3928                         my $mode_chng = "";
3929                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3930                                 # mode also for directories, so we cannot use $to_mode_str
3931                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3932                         }
3933                         print "<td>" .
3934                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3935                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3936                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3937                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3938                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3939                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3940                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3941                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3942                               "<td class=\"link\">";
3943                         if ($action eq 'commitdiff') {
3944                                 # link to patch
3945                                 $patchno++;
3946                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3947                                       " | ";
3948                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3949                                 # "commit" view and modified file (not only pure rename or copy)
3950                                 print $cgi->a({-href => href(action=>"blobdiff",
3951                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3952                                                              hash_base=>$hash, hash_parent_base=>$parent,
3953                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3954                                               "diff") .
3955                                       " | ";
3956                         }
3957                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3958                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3959                                       "blob") . " | ";
3960                         if ($have_blame) {
3961                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3962                                                              file_name=>$diff->{'to_file'})},
3963                                               "blame") . " | ";
3964                         }
3965                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3966                                                     file_name=>$diff->{'to_file'})},
3967                                       "history");
3968                         print "</td>\n";
3969
3970                 } # we should not encounter Unmerged (U) or Unknown (X) status
3971                 print "</tr>\n";
3972         }
3973         print "</tbody>" if $has_header;
3974         print "</table>\n";
3975 }
3976
3977 sub git_patchset_body {
3978         my ($fd, $difftree, $hash, @hash_parents) = @_;
3979         my ($hash_parent) = $hash_parents[0];
3980
3981         my $is_combined = (@hash_parents > 1);
3982         my $patch_idx = 0;
3983         my $patch_number = 0;
3984         my $patch_line;
3985         my $diffinfo;
3986         my $to_name;
3987         my (%from, %to);
3988
3989         print "<div class=\"patchset\">\n";
3990
3991         # skip to first patch
3992         while ($patch_line = <$fd>) {
3993                 chomp $patch_line;
3994
3995                 last if ($patch_line =~ m/^diff /);
3996         }
3997
3998  PATCH:
3999         while ($patch_line) {
4000
4001                 # parse "git diff" header line
4002                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4003                         # $1 is from_name, which we do not use
4004                         $to_name = unquote($2);
4005                         $to_name =~ s!^b/!!;
4006                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4007                         # $1 is 'cc' or 'combined', which we do not use
4008                         $to_name = unquote($2);
4009                 } else {
4010                         $to_name = undef;
4011                 }
4012
4013                 # check if current patch belong to current raw line
4014                 # and parse raw git-diff line if needed
4015                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4016                         # this is continuation of a split patch
4017                         print "<div class=\"patch cont\">\n";
4018                 } else {
4019                         # advance raw git-diff output if needed
4020                         $patch_idx++ if defined $diffinfo;
4021
4022                         # read and prepare patch information
4023                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4024
4025                         # compact combined diff output can have some patches skipped
4026                         # find which patch (using pathname of result) we are at now;
4027                         if ($is_combined) {
4028                                 while ($to_name ne $diffinfo->{'to_file'}) {
4029                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4030                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4031                                               "</div>\n";  # class="patch"
4032
4033                                         $patch_idx++;
4034                                         $patch_number++;
4035
4036                                         last if $patch_idx > $#$difftree;
4037                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4038                                 }
4039                         }
4040
4041                         # modifies %from, %to hashes
4042                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4043
4044                         # this is first patch for raw difftree line with $patch_idx index
4045                         # we index @$difftree array from 0, but number patches from 1
4046                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4047                 }
4048
4049                 # git diff header
4050                 #assert($patch_line =~ m/^diff /) if DEBUG;
4051                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4052                 $patch_number++;
4053                 # print "git diff" header
4054                 print format_git_diff_header_line($patch_line, $diffinfo,
4055                                                   \%from, \%to);
4056
4057                 # print extended diff header
4058                 print "<div class=\"diff extended_header\">\n";
4059         EXTENDED_HEADER:
4060                 while ($patch_line = <$fd>) {
4061                         chomp $patch_line;
4062
4063                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4064
4065                         print format_extended_diff_header_line($patch_line, $diffinfo,
4066                                                                \%from, \%to);
4067                 }
4068                 print "</div>\n"; # class="diff extended_header"
4069
4070                 # from-file/to-file diff header
4071                 if (! $patch_line) {
4072                         print "</div>\n"; # class="patch"
4073                         last PATCH;
4074                 }
4075                 next PATCH if ($patch_line =~ m/^diff /);
4076                 #assert($patch_line =~ m/^---/) if DEBUG;
4077
4078                 my $last_patch_line = $patch_line;
4079                 $patch_line = <$fd>;
4080                 chomp $patch_line;
4081                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4082
4083                 print format_diff_from_to_header($last_patch_line, $patch_line,
4084                                                  $diffinfo, \%from, \%to,
4085                                                  @hash_parents);
4086
4087                 # the patch itself
4088         LINE:
4089                 while ($patch_line = <$fd>) {
4090                         chomp $patch_line;
4091
4092                         next PATCH if ($patch_line =~ m/^diff /);
4093
4094                         print format_diff_line($patch_line, \%from, \%to);
4095                 }
4096
4097         } continue {
4098                 print "</div>\n"; # class="patch"
4099         }
4100
4101         # for compact combined (--cc) format, with chunk and patch simpliciaction
4102         # patchset might be empty, but there might be unprocessed raw lines
4103         for (++$patch_idx if $patch_number > 0;
4104              $patch_idx < @$difftree;
4105              ++$patch_idx) {
4106                 # read and prepare patch information
4107                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4108
4109                 # generate anchor for "patch" links in difftree / whatchanged part
4110                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4111                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4112                       "</div>\n";  # class="patch"
4113
4114                 $patch_number++;
4115         }
4116
4117         if ($patch_number == 0) {
4118                 if (@hash_parents > 1) {
4119                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4120                 } else {
4121                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4122                 }
4123         }
4124
4125         print "</div>\n"; # class="patchset"
4126 }
4127
4128 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4129
4130 # fills project list info (age, description, owner, forks) for each
4131 # project in the list, removing invalid projects from returned list
4132 # NOTE: modifies $projlist, but does not remove entries from it
4133 sub fill_project_list_info {
4134         my ($projlist, $check_forks) = @_;
4135         my @projects;
4136
4137         my $show_ctags = gitweb_check_feature('ctags');
4138  PROJECT:
4139         foreach my $pr (@$projlist) {
4140                 my (@activity) = git_get_last_activity($pr->{'path'});
4141                 unless (@activity) {
4142                         next PROJECT;
4143                 }
4144                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4145                 if (!defined $pr->{'descr'}) {
4146                         my $descr = git_get_project_description($pr->{'path'}) || "";
4147                         $descr = to_utf8($descr);
4148                         $pr->{'descr_long'} = $descr;
4149                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4150                 }
4151                 if (!defined $pr->{'owner'}) {
4152                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4153                 }
4154                 if ($check_forks) {
4155                         my $pname = $pr->{'path'};
4156                         if (($pname =~ s/\.git$//) &&
4157                             ($pname !~ /\/$/) &&
4158                             (-d "$projectroot/$pname")) {
4159                                 $pr->{'forks'} = "-d $projectroot/$pname";
4160                         } else {
4161                                 $pr->{'forks'} = 0;
4162                         }
4163                 }
4164                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4165                 push @projects, $pr;
4166         }
4167
4168         return @projects;
4169 }
4170
4171 # print 'sort by' <th> element, generating 'sort by $name' replay link
4172 # if that order is not selected
4173 sub print_sort_th {
4174         my ($name, $order, $header) = @_;
4175         $header ||= ucfirst($name);
4176
4177         if ($order eq $name) {
4178                 print "<th>$header</th>\n";
4179         } else {
4180                 print "<th>" .
4181                       $cgi->a({-href => href(-replay=>1, order=>$name),
4182                                -class => "header"}, $header) .
4183                       "</th>\n";
4184         }
4185 }
4186
4187 sub git_project_list_body {
4188         # actually uses global variable $project
4189         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4190
4191         my $check_forks = gitweb_check_feature('forks');
4192         my @projects = fill_project_list_info($projlist, $check_forks);
4193
4194         $order ||= $default_projects_order;
4195         $from = 0 unless defined $from;
4196         $to = $#projects if (!defined $to || $#projects < $to);
4197
4198         my %order_info = (
4199                 project => { key => 'path', type => 'str' },
4200                 descr => { key => 'descr_long', type => 'str' },
4201                 owner => { key => 'owner', type => 'str' },
4202                 age => { key => 'age', type => 'num' }
4203         );
4204         my $oi = $order_info{$order};
4205         if ($oi->{'type'} eq 'str') {
4206                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4207         } else {
4208                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4209         }
4210
4211         my $show_ctags = gitweb_check_feature('ctags');
4212         if ($show_ctags) {
4213                 my %ctags;
4214                 foreach my $p (@projects) {
4215                         foreach my $ct (keys %{$p->{'ctags'}}) {
4216                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4217                         }
4218                 }
4219                 my $cloud = git_populate_project_tagcloud(\%ctags);
4220                 print git_show_project_tagcloud($cloud, 64);
4221         }
4222
4223         print "<table class=\"project_list\">\n";
4224         unless ($no_header) {
4225                 print "<tr>\n";
4226                 if ($check_forks) {
4227                         print "<th></th>\n";
4228                 }
4229                 print_sort_th('project', $order, 'Project');
4230                 print_sort_th('descr', $order, 'Description');
4231                 print_sort_th('owner', $order, 'Owner');
4232                 print_sort_th('age', $order, 'Last Change');
4233                 print "<th></th>\n" . # for links
4234                       "</tr>\n";
4235         }
4236         my $alternate = 1;
4237         my $tagfilter = $cgi->param('by_tag');
4238         for (my $i = $from; $i <= $to; $i++) {
4239                 my $pr = $projects[$i];
4240
4241                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4242                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4243                         and not $pr->{'descr_long'} =~ /$searchtext/;
4244                 # Weed out forks or non-matching entries of search
4245                 if ($check_forks) {
4246                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4247                         $forkbase="^$forkbase" if $forkbase;
4248                         next if not $searchtext and not $tagfilter and $show_ctags
4249                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4250                 }
4251
4252                 if ($alternate) {
4253                         print "<tr class=\"dark\">\n";
4254                 } else {
4255                         print "<tr class=\"light\">\n";
4256                 }
4257                 $alternate ^= 1;
4258                 if ($check_forks) {
4259                         print "<td>";
4260                         if ($pr->{'forks'}) {
4261                                 print "<!-- $pr->{'forks'} -->\n";
4262                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4263                         }
4264                         print "</td>\n";
4265                 }
4266                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4267                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4268                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4269                                         -class => "list", -title => $pr->{'descr_long'}},
4270                                         esc_html($pr->{'descr'})) . "</td>\n" .
4271                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4272                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4273                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4274                       "<td class=\"link\">" .
4275                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4276                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4277                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4278                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4279                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4280                       "</td>\n" .
4281                       "</tr>\n";
4282         }
4283         if (defined $extra) {
4284                 print "<tr>\n";
4285                 if ($check_forks) {
4286                         print "<td></td>\n";
4287                 }
4288                 print "<td colspan=\"5\">$extra</td>\n" .
4289                       "</tr>\n";
4290         }
4291         print "</table>\n";
4292 }
4293
4294 sub git_shortlog_body {
4295         # uses global variable $project
4296         my ($commitlist, $from, $to, $refs, $extra) = @_;
4297
4298         $from = 0 unless defined $from;
4299         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4300
4301         print "<table class=\"shortlog\">\n";
4302         my $alternate = 1;
4303         for (my $i = $from; $i <= $to; $i++) {
4304                 my %co = %{$commitlist->[$i]};
4305                 my $commit = $co{'id'};
4306                 my $ref = format_ref_marker($refs, $commit);
4307                 if ($alternate) {
4308                         print "<tr class=\"dark\">\n";
4309                 } else {
4310                         print "<tr class=\"light\">\n";
4311                 }
4312                 $alternate ^= 1;
4313                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4314                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4315                       format_author_html('td', \%co, 10) . "<td>";
4316                 print format_subject_html($co{'title'}, $co{'title_short'},
4317                                           href(action=>"commit", hash=>$commit), $ref);
4318                 print "</td>\n" .
4319                       "<td class=\"link\">" .
4320                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4321                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4322                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4323                 my $snapshot_links = format_snapshot_links($commit);
4324                 if (defined $snapshot_links) {
4325                         print " | " . $snapshot_links;
4326                 }
4327                 print "</td>\n" .
4328                       "</tr>\n";
4329         }
4330         if (defined $extra) {
4331                 print "<tr>\n" .
4332                       "<td colspan=\"4\">$extra</td>\n" .
4333                       "</tr>\n";
4334         }
4335         print "</table>\n";
4336 }
4337
4338 sub git_history_body {
4339         # Warning: assumes constant type (blob or tree) during history
4340         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4341
4342         $from = 0 unless defined $from;
4343         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4344
4345         print "<table class=\"history\">\n";
4346         my $alternate = 1;
4347         for (my $i = $from; $i <= $to; $i++) {
4348                 my %co = %{$commitlist->[$i]};
4349                 if (!%co) {
4350                         next;
4351                 }
4352                 my $commit = $co{'id'};
4353
4354                 my $ref = format_ref_marker($refs, $commit);
4355
4356                 if ($alternate) {
4357                         print "<tr class=\"dark\">\n";
4358                 } else {
4359                         print "<tr class=\"light\">\n";
4360                 }
4361                 $alternate ^= 1;
4362                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4363         # shortlog:   format_author_html('td', \%co, 10)
4364                       format_author_html('td', \%co, 15, 3) . "<td>";
4365                 # originally git_history used chop_str($co{'title'}, 50)
4366                 print format_subject_html($co{'title'}, $co{'title_short'},
4367                                           href(action=>"commit", hash=>$commit), $ref);
4368                 print "</td>\n" .
4369                       "<td class=\"link\">" .
4370                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4371                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4372
4373                 if ($ftype eq 'blob') {
4374                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4375                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4376                         if (defined $blob_current && defined $blob_parent &&
4377                                         $blob_current ne $blob_parent) {
4378                                 print " | " .
4379                                         $cgi->a({-href => href(action=>"blobdiff",
4380                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4381                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4382                                                                file_name=>$file_name)},
4383                                                 "diff to current");
4384                         }
4385                 }
4386                 print "</td>\n" .
4387                       "</tr>\n";
4388         }
4389         if (defined $extra) {
4390                 print "<tr>\n" .
4391                       "<td colspan=\"4\">$extra</td>\n" .
4392                       "</tr>\n";
4393         }
4394         print "</table>\n";
4395 }
4396
4397 sub git_tags_body {
4398         # uses global variable $project
4399         my ($taglist, $from, $to, $extra) = @_;
4400         $from = 0 unless defined $from;
4401         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4402
4403         print "<table class=\"tags\">\n";
4404         my $alternate = 1;
4405         for (my $i = $from; $i <= $to; $i++) {
4406                 my $entry = $taglist->[$i];
4407                 my %tag = %$entry;
4408                 my $comment = $tag{'subject'};
4409                 my $comment_short;
4410                 if (defined $comment) {
4411                         $comment_short = chop_str($comment, 30, 5);
4412                 }
4413                 if ($alternate) {
4414                         print "<tr class=\"dark\">\n";
4415                 } else {
4416                         print "<tr class=\"light\">\n";
4417                 }
4418                 $alternate ^= 1;
4419                 if (defined $tag{'age'}) {
4420                         print "<td><i>$tag{'age'}</i></td>\n";
4421                 } else {
4422                         print "<td></td>\n";
4423                 }
4424                 print "<td>" .
4425                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4426                                -class => "list name"}, esc_html($tag{'name'})) .
4427                       "</td>\n" .
4428                       "<td>";
4429                 if (defined $comment) {
4430                         print format_subject_html($comment, $comment_short,
4431                                                   href(action=>"tag", hash=>$tag{'id'}));
4432                 }
4433                 print "</td>\n" .
4434                       "<td class=\"selflink\">";
4435                 if ($tag{'type'} eq "tag") {
4436                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4437                 } else {
4438                         print "&nbsp;";
4439                 }
4440                 print "</td>\n" .
4441                       "<td class=\"link\">" . " | " .
4442                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4443                 if ($tag{'reftype'} eq "commit") {
4444                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4445                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4446                 } elsif ($tag{'reftype'} eq "blob") {
4447                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4448                 }
4449                 print "</td>\n" .
4450                       "</tr>";
4451         }
4452         if (defined $extra) {
4453                 print "<tr>\n" .
4454                       "<td colspan=\"5\">$extra</td>\n" .
4455                       "</tr>\n";
4456         }
4457         print "</table>\n";
4458 }
4459
4460 sub git_heads_body {
4461         # uses global variable $project
4462         my ($headlist, $head, $from, $to, $extra) = @_;
4463         $from = 0 unless defined $from;
4464         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4465
4466         print "<table class=\"heads\">\n";
4467         my $alternate = 1;
4468         for (my $i = $from; $i <= $to; $i++) {
4469                 my $entry = $headlist->[$i];
4470                 my %ref = %$entry;
4471                 my $curr = $ref{'id'} eq $head;
4472                 if ($alternate) {
4473                         print "<tr class=\"dark\">\n";
4474                 } else {
4475                         print "<tr class=\"light\">\n";
4476                 }
4477                 $alternate ^= 1;
4478                 print "<td><i>$ref{'age'}</i></td>\n" .
4479                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4480                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4481                                -class => "list name"},esc_html($ref{'name'})) .
4482                       "</td>\n" .
4483                       "<td class=\"link\">" .
4484                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4485                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4486                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4487                       "</td>\n" .
4488                       "</tr>";
4489         }
4490         if (defined $extra) {
4491                 print "<tr>\n" .
4492                       "<td colspan=\"3\">$extra</td>\n" .
4493                       "</tr>\n";
4494         }
4495         print "</table>\n";
4496 }
4497
4498 sub git_search_grep_body {
4499         my ($commitlist, $from, $to, $extra) = @_;
4500         $from = 0 unless defined $from;
4501         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4502
4503         print "<table class=\"commit_search\">\n";
4504         my $alternate = 1;
4505         for (my $i = $from; $i <= $to; $i++) {
4506                 my %co = %{$commitlist->[$i]};
4507                 if (!%co) {
4508                         next;
4509                 }
4510                 my $commit = $co{'id'};
4511                 if ($alternate) {
4512                         print "<tr class=\"dark\">\n";
4513                 } else {
4514                         print "<tr class=\"light\">\n";
4515                 }
4516                 $alternate ^= 1;
4517                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4518                       format_author_html('td', \%co, 15, 5) .
4519                       "<td>" .
4520                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4521                                -class => "list subject"},
4522                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4523                 my $comment = $co{'comment'};
4524                 foreach my $line (@$comment) {
4525                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4526                                 my ($lead, $match, $trail) = ($1, $2, $3);
4527                                 $match = chop_str($match, 70, 5, 'center');
4528                                 my $contextlen = int((80 - length($match))/2);
4529                                 $contextlen = 30 if ($contextlen > 30);
4530                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4531                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4532
4533                                 $lead  = esc_html($lead);
4534                                 $match = esc_html($match);
4535                                 $trail = esc_html($trail);
4536
4537                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4538                         }
4539                 }
4540                 print "</td>\n" .
4541                       "<td class=\"link\">" .
4542                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4543                       " | " .
4544                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4545                       " | " .
4546                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4547                 print "</td>\n" .
4548                       "</tr>\n";
4549         }
4550         if (defined $extra) {
4551                 print "<tr>\n" .
4552                       "<td colspan=\"3\">$extra</td>\n" .
4553                       "</tr>\n";
4554         }
4555         print "</table>\n";
4556 }
4557
4558 ## ======================================================================
4559 ## ======================================================================
4560 ## actions
4561
4562 sub git_project_list {
4563         my $order = $input_params{'order'};
4564         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4565                 die_error(400, "Unknown order parameter");
4566         }
4567
4568         my @list = git_get_projects_list();
4569         if (!@list) {
4570                 die_error(404, "No projects found");
4571         }
4572
4573         git_header_html();
4574         if (-f $home_text) {
4575                 print "<div class=\"index_include\">\n";
4576                 insert_file($home_text);
4577                 print "</div>\n";
4578         }
4579         print $cgi->startform(-method => "get") .
4580               "<p class=\"projsearch\">Search:\n" .
4581               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4582               "</p>" .
4583               $cgi->end_form() . "\n";
4584         git_project_list_body(\@list, $order);
4585         git_footer_html();
4586 }
4587
4588 sub git_forks {
4589         my $order = $input_params{'order'};
4590         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4591                 die_error(400, "Unknown order parameter");
4592         }
4593
4594         my @list = git_get_projects_list($project);
4595         if (!@list) {
4596                 die_error(404, "No forks found");
4597         }
4598
4599         git_header_html();
4600         git_print_page_nav('','');
4601         git_print_header_div('summary', "$project forks");
4602         git_project_list_body(\@list, $order);
4603         git_footer_html();
4604 }
4605
4606 sub git_project_index {
4607         my @projects = git_get_projects_list($project);
4608
4609         print $cgi->header(
4610                 -type => 'text/plain',
4611                 -charset => 'utf-8',
4612                 -content_disposition => 'inline; filename="index.aux"');
4613
4614         foreach my $pr (@projects) {
4615                 if (!exists $pr->{'owner'}) {
4616                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4617                 }
4618
4619                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4620                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4621                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4622                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4623                 $path  =~ s/ /\+/g;
4624                 $owner =~ s/ /\+/g;
4625
4626                 print "$path $owner\n";
4627         }
4628 }
4629
4630 sub git_summary {
4631         my $descr = git_get_project_description($project) || "none";
4632         my %co = parse_commit("HEAD");
4633         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4634         my $head = $co{'id'};
4635
4636         my $owner = git_get_project_owner($project);
4637
4638         my $refs = git_get_references();
4639         # These get_*_list functions return one more to allow us to see if
4640         # there are more ...
4641         my @taglist  = git_get_tags_list(16);
4642         my @headlist = git_get_heads_list(16);
4643         my @forklist;
4644         my $check_forks = gitweb_check_feature('forks');
4645
4646         if ($check_forks) {
4647                 @forklist = git_get_projects_list($project);
4648         }
4649
4650         git_header_html();
4651         git_print_page_nav('summary','', $head);
4652
4653         print "<div class=\"title\">&nbsp;</div>\n";
4654         print "<table class=\"projects_list\">\n" .
4655               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4656               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4657         if (defined $cd{'rfc2822'}) {
4658                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4659         }
4660
4661         # use per project git URL list in $projectroot/$project/cloneurl
4662         # or make project git URL from git base URL and project name
4663         my $url_tag = "URL";
4664         my @url_list = git_get_project_url_list($project);
4665         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4666         foreach my $git_url (@url_list) {
4667                 next unless $git_url;
4668                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4669                 $url_tag = "";
4670         }
4671
4672         # Tag cloud
4673         my $show_ctags = gitweb_check_feature('ctags');
4674         if ($show_ctags) {
4675                 my $ctags = git_get_project_ctags($project);
4676                 my $cloud = git_populate_project_tagcloud($ctags);
4677                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4678                 print "</td>\n<td>" unless %$ctags;
4679                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4680                 print "</td>\n<td>" if %$ctags;
4681                 print git_show_project_tagcloud($cloud, 48);
4682                 print "</td></tr>";
4683         }
4684
4685         print "</table>\n";
4686
4687         # If XSS prevention is on, we don't include README.html.
4688         # TODO: Allow a readme in some safe format.
4689         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4690                 print "<div class=\"title\">readme</div>\n" .
4691                       "<div class=\"readme\">\n";
4692                 insert_file("$projectroot/$project/README.html");
4693                 print "\n</div>\n"; # class="readme"
4694         }
4695
4696         # we need to request one more than 16 (0..15) to check if
4697         # those 16 are all
4698         my @commitlist = $head ? parse_commits($head, 17) : ();
4699         if (@commitlist) {
4700                 git_print_header_div('shortlog');
4701                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4702                                   $#commitlist <=  15 ? undef :
4703                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4704         }
4705
4706         if (@taglist) {
4707                 git_print_header_div('tags');
4708                 git_tags_body(\@taglist, 0, 15,
4709                               $#taglist <=  15 ? undef :
4710                               $cgi->a({-href => href(action=>"tags")}, "..."));
4711         }
4712
4713         if (@headlist) {
4714                 git_print_header_div('heads');
4715                 git_heads_body(\@headlist, $head, 0, 15,
4716                                $#headlist <= 15 ? undef :
4717                                $cgi->a({-href => href(action=>"heads")}, "..."));
4718         }
4719
4720         if (@forklist) {
4721                 git_print_header_div('forks');
4722                 git_project_list_body(\@forklist, 'age', 0, 15,
4723                                       $#forklist <= 15 ? undef :
4724                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4725                                       'no_header');
4726         }
4727
4728         git_footer_html();
4729 }
4730
4731 sub git_tag {
4732         my $head = git_get_head_hash($project);
4733         git_header_html();
4734         git_print_page_nav('','', $head,undef,$head);
4735         my %tag = parse_tag($hash);
4736
4737         if (! %tag) {
4738                 die_error(404, "Unknown tag object");
4739         }
4740
4741         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4742         print "<div class=\"title_text\">\n" .
4743               "<table class=\"object_header\">\n" .
4744               "<tr>\n" .
4745               "<td>object</td>\n" .
4746               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4747                                $tag{'object'}) . "</td>\n" .
4748               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4749                                               $tag{'type'}) . "</td>\n" .
4750               "</tr>\n";
4751         if (defined($tag{'author'})) {
4752                 git_print_authorship_rows(\%tag, 'author');
4753         }
4754         print "</table>\n\n" .
4755               "</div>\n";
4756         print "<div class=\"page_body\">";
4757         my $comment = $tag{'comment'};
4758         foreach my $line (@$comment) {
4759                 chomp $line;
4760                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4761         }
4762         print "</div>\n";
4763         git_footer_html();
4764 }
4765
4766 sub git_blame {
4767         # permissions
4768         gitweb_check_feature('blame')
4769                 or die_error(403, "Blame view not allowed");
4770
4771         # error checking
4772         die_error(400, "No file name given") unless $file_name;
4773         $hash_base ||= git_get_head_hash($project);
4774         die_error(404, "Couldn't find base commit") unless $hash_base;
4775         my %co = parse_commit($hash_base)
4776                 or die_error(404, "Commit not found");
4777         my $ftype = "blob";
4778         if (!defined $hash) {
4779                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4780                         or die_error(404, "Error looking up file");
4781         } else {
4782                 $ftype = git_get_type($hash);
4783                 if ($ftype !~ "blob") {
4784                         die_error(400, "Object is not a blob");
4785                 }
4786         }
4787
4788         # run git-blame --porcelain
4789         open my $fd, "-|", git_cmd(), "blame", '-p',
4790                 $hash_base, '--', $file_name
4791                 or die_error(500, "Open git-blame failed");
4792
4793         # page header
4794         git_header_html();
4795         my $formats_nav =
4796                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4797                         "blob") .
4798                 " | " .
4799                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4800                         "history") .
4801                 " | " .
4802                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4803                         "HEAD");
4804         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4805         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4806         git_print_page_path($file_name, $ftype, $hash_base);
4807
4808         # page body
4809         my @rev_color = qw(light2 dark2);
4810         my $num_colors = scalar(@rev_color);
4811         my $current_color = 0;
4812         my %metainfo = ();
4813
4814         print <<HTML;
4815 <div class="page_body">
4816 <table class="blame">
4817 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4818 HTML
4819  LINE:
4820         while (my $line = <$fd>) {
4821                 chomp $line;
4822                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4823                 # no <lines in group> for subsequent lines in group of lines
4824                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4825                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4826                 if (!exists $metainfo{$full_rev}) {
4827                         $metainfo{$full_rev} = {};
4828                 }
4829                 my $meta = $metainfo{$full_rev};
4830                 my $data;
4831                 while ($data = <$fd>) {
4832                         chomp $data;
4833                         last if ($data =~ s/^\t//); # contents of line
4834                         if ($data =~ /^(\S+) (.*)$/) {
4835                                 $meta->{$1} = $2;
4836                         }
4837                 }
4838                 my $short_rev = substr($full_rev, 0, 8);
4839                 my $author = $meta->{'author'};
4840                 my %date =
4841                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4842                 my $date = $date{'iso-tz'};
4843                 if ($group_size) {
4844                         $current_color = ($current_color + 1) % $num_colors;
4845                 }
4846                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4847                 if ($group_size) {
4848                         print "<td class=\"sha1\"";
4849                         print " title=\"". esc_html($author) . ", $date\"";
4850                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4851                         print ">";
4852                         print $cgi->a({-href => href(action=>"commit",
4853                                                      hash=>$full_rev,
4854                                                      file_name=>$file_name)},
4855                                       esc_html($short_rev));
4856                         print "</td>\n";
4857                 }
4858                 my $parent_commit;
4859                 if (!exists $meta->{'parent'}) {
4860                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4861                                 or die_error(500, "Open git-rev-parse failed");
4862                         $parent_commit = <$dd>;
4863                         close $dd;
4864                         chomp($parent_commit);
4865                         $meta->{'parent'} = $parent_commit;
4866                 } else {
4867                         $parent_commit = $meta->{'parent'};
4868                 }
4869                 my $blamed = href(action => 'blame',
4870                                   file_name => $meta->{'filename'},
4871                                   hash_base => $parent_commit);
4872                 print "<td class=\"linenr\">";
4873                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4874                                 -class => "linenr" },
4875                               esc_html($lineno));
4876                 print "</td>";
4877                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4878                 print "</tr>\n";
4879         }
4880         print "</table>\n";
4881         print "</div>";
4882         close $fd
4883                 or print "Reading blob failed\n";
4884
4885         # page footer
4886         git_footer_html();
4887 }
4888
4889 sub git_tags {
4890         my $head = git_get_head_hash($project);
4891         git_header_html();
4892         git_print_page_nav('','', $head,undef,$head);
4893         git_print_header_div('summary', $project);
4894
4895         my @tagslist = git_get_tags_list();
4896         if (@tagslist) {
4897                 git_tags_body(\@tagslist);
4898         }
4899         git_footer_html();
4900 }
4901
4902 sub git_heads {
4903         my $head = git_get_head_hash($project);
4904         git_header_html();
4905         git_print_page_nav('','', $head,undef,$head);
4906         git_print_header_div('summary', $project);
4907
4908         my @headslist = git_get_heads_list();
4909         if (@headslist) {
4910                 git_heads_body(\@headslist, $head);
4911         }
4912         git_footer_html();
4913 }
4914
4915 sub git_blob_plain {
4916         my $type = shift;
4917         my $expires;
4918
4919         if (!defined $hash) {
4920                 if (defined $file_name) {
4921                         my $base = $hash_base || git_get_head_hash($project);
4922                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4923                                 or die_error(404, "Cannot find file");
4924                 } else {
4925                         die_error(400, "No file name defined");
4926                 }
4927         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4928                 # blobs defined by non-textual hash id's can be cached
4929                 $expires = "+1d";
4930         }
4931
4932         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4933                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4934
4935         # content-type (can include charset)
4936         $type = blob_contenttype($fd, $file_name, $type);
4937
4938         # "save as" filename, even when no $file_name is given
4939         my $save_as = "$hash";
4940         if (defined $file_name) {
4941                 $save_as = $file_name;
4942         } elsif ($type =~ m/^text\//) {
4943                 $save_as .= '.txt';
4944         }
4945
4946         # With XSS prevention on, blobs of all types except a few known safe
4947         # ones are served with "Content-Disposition: attachment" to make sure
4948         # they don't run in our security domain.  For certain image types,
4949         # blob view writes an <img> tag referring to blob_plain view, and we
4950         # want to be sure not to break that by serving the image as an
4951         # attachment (though Firefox 3 doesn't seem to care).
4952         my $sandbox = $prevent_xss &&
4953                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4954
4955         print $cgi->header(
4956                 -type => $type,
4957                 -expires => $expires,
4958                 -content_disposition =>
4959                         ($sandbox ? 'attachment' : 'inline')
4960                         . '; filename="' . $save_as . '"');
4961         local $/ = undef;
4962         binmode STDOUT, ':raw';
4963         print <$fd>;
4964         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4965         close $fd;
4966 }
4967
4968 sub git_blob {
4969         my $expires;
4970
4971         if (!defined $hash) {
4972                 if (defined $file_name) {
4973                         my $base = $hash_base || git_get_head_hash($project);
4974                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4975                                 or die_error(404, "Cannot find file");
4976                 } else {
4977                         die_error(400, "No file name defined");
4978                 }
4979         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4980                 # blobs defined by non-textual hash id's can be cached
4981                 $expires = "+1d";
4982         }
4983
4984         my $have_blame = gitweb_check_feature('blame');
4985         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4986                 or die_error(500, "Couldn't cat $file_name, $hash");
4987         my $mimetype = blob_mimetype($fd, $file_name);
4988         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4989                 close $fd;
4990                 return git_blob_plain($mimetype);
4991         }
4992         # we can have blame only for text/* mimetype
4993         $have_blame &&= ($mimetype =~ m!^text/!);
4994
4995         git_header_html(undef, $expires);
4996         my $formats_nav = '';
4997         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4998                 if (defined $file_name) {
4999                         if ($have_blame) {
5000                                 $formats_nav .=
5001                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5002                                                 "blame") .
5003                                         " | ";
5004                         }
5005                         $formats_nav .=
5006                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5007                                         "history") .
5008                                 " | " .
5009                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5010                                         "raw") .
5011                                 " | " .
5012                                 $cgi->a({-href => href(action=>"blob",
5013                                                        hash_base=>"HEAD", file_name=>$file_name)},
5014                                         "HEAD");
5015                 } else {
5016                         $formats_nav .=
5017                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5018                                         "raw");
5019                 }
5020                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5021                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5022         } else {
5023                 print "<div class=\"page_nav\">\n" .
5024                       "<br/><br/></div>\n" .
5025                       "<div class=\"title\">$hash</div>\n";
5026         }
5027         git_print_page_path($file_name, "blob", $hash_base);
5028         print "<div class=\"page_body\">\n";
5029         if ($mimetype =~ m!^image/!) {
5030                 print qq!<img type="$mimetype"!;
5031                 if ($file_name) {
5032                         print qq! alt="$file_name" title="$file_name"!;
5033                 }
5034                 print qq! src="! .
5035                       href(action=>"blob_plain", hash=>$hash,
5036                            hash_base=>$hash_base, file_name=>$file_name) .
5037                       qq!" />\n!;
5038         } else {
5039                 my $nr;
5040                 while (my $line = <$fd>) {
5041                         chomp $line;
5042                         $nr++;
5043                         $line = untabify($line);
5044                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5045                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5046                 }
5047         }
5048         close $fd
5049                 or print "Reading blob failed.\n";
5050         print "</div>";
5051         git_footer_html();
5052 }
5053
5054 sub git_tree {
5055         if (!defined $hash_base) {
5056                 $hash_base = "HEAD";
5057         }
5058         if (!defined $hash) {
5059                 if (defined $file_name) {
5060                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5061                 } else {
5062                         $hash = $hash_base;
5063                 }
5064         }
5065         die_error(404, "No such tree") unless defined($hash);
5066
5067         my @entries = ();
5068         {
5069                 local $/ = "\0";
5070                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5071                         or die_error(500, "Open git-ls-tree failed");
5072                 @entries = map { chomp; $_ } <$fd>;
5073                 close $fd
5074                         or die_error(404, "Reading tree failed");
5075         }
5076
5077         my $refs = git_get_references();
5078         my $ref = format_ref_marker($refs, $hash_base);
5079         git_header_html();
5080         my $basedir = '';
5081         my $have_blame = gitweb_check_feature('blame');
5082         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5083                 my @views_nav = ();
5084                 if (defined $file_name) {
5085                         push @views_nav,
5086                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5087                                         "history"),
5088                                 $cgi->a({-href => href(action=>"tree",
5089                                                        hash_base=>"HEAD", file_name=>$file_name)},
5090                                         "HEAD"),
5091                 }
5092                 my $snapshot_links = format_snapshot_links($hash);
5093                 if (defined $snapshot_links) {
5094                         # FIXME: Should be available when we have no hash base as well.
5095                         push @views_nav, $snapshot_links;
5096                 }
5097                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5098                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5099         } else {
5100                 undef $hash_base;
5101                 print "<div class=\"page_nav\">\n";
5102                 print "<br/><br/></div>\n";
5103                 print "<div class=\"title\">$hash</div>\n";
5104         }
5105         if (defined $file_name) {
5106                 $basedir = $file_name;
5107                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5108                         $basedir .= '/';
5109                 }
5110                 git_print_page_path($file_name, 'tree', $hash_base);
5111         }
5112         print "<div class=\"page_body\">\n";
5113         print "<table class=\"tree\">\n";
5114         my $alternate = 1;
5115         # '..' (top directory) link if possible
5116         if (defined $hash_base &&
5117             defined $file_name && $file_name =~ m![^/]+$!) {
5118                 if ($alternate) {
5119                         print "<tr class=\"dark\">\n";
5120                 } else {
5121                         print "<tr class=\"light\">\n";
5122                 }
5123                 $alternate ^= 1;
5124
5125                 my $up = $file_name;
5126                 $up =~ s!/?[^/]+$!!;
5127                 undef $up unless $up;
5128                 # based on git_print_tree_entry
5129                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5130                 print '<td class="list">';
5131                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5132                                              file_name=>$up)},
5133                               "..");
5134                 print "</td>\n";
5135                 print "<td class=\"link\"></td>\n";
5136
5137                 print "</tr>\n";
5138         }
5139         foreach my $line (@entries) {
5140                 my %t = parse_ls_tree_line($line, -z => 1);
5141
5142                 if ($alternate) {
5143                         print "<tr class=\"dark\">\n";
5144                 } else {
5145                         print "<tr class=\"light\">\n";
5146                 }
5147                 $alternate ^= 1;
5148
5149                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5150
5151                 print "</tr>\n";
5152         }
5153         print "</table>\n" .
5154               "</div>";
5155         git_footer_html();
5156 }
5157
5158 sub git_snapshot {
5159         my $format = $input_params{'snapshot_format'};
5160         if (!@snapshot_fmts) {
5161                 die_error(403, "Snapshots not allowed");
5162         }
5163         # default to first supported snapshot format
5164         $format ||= $snapshot_fmts[0];
5165         if ($format !~ m/^[a-z0-9]+$/) {
5166                 die_error(400, "Invalid snapshot format parameter");
5167         } elsif (!exists($known_snapshot_formats{$format})) {
5168                 die_error(400, "Unknown snapshot format");
5169         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5170                 die_error(403, "Unsupported snapshot format");
5171         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5172                 die_error(403, "Snapshot format not allowed");
5173         }
5174
5175         if (!defined $hash) {
5176                 $hash = git_get_head_hash($project);
5177         }
5178
5179         my $name = $project;
5180         $name =~ s,([^/])/*\.git$,$1,;
5181         $name = basename($name);
5182         my $filename = to_utf8($name);
5183         $name =~ s/\047/\047\\\047\047/g;
5184         my $cmd;
5185         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5186         $cmd = quote_command(
5187                 git_cmd(), 'archive',
5188                 "--format=$known_snapshot_formats{$format}{'format'}",
5189                 "--prefix=$name/", $hash);
5190         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5191                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5192         }
5193
5194         print $cgi->header(
5195                 -type => $known_snapshot_formats{$format}{'type'},
5196                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5197                 -status => '200 OK');
5198
5199         open my $fd, "-|", $cmd
5200                 or die_error(500, "Execute git-archive failed");
5201         binmode STDOUT, ':raw';
5202         print <$fd>;
5203         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5204         close $fd;
5205 }
5206
5207 sub git_log {
5208         my $head = git_get_head_hash($project);
5209         if (!defined $hash) {
5210                 $hash = $head;
5211         }
5212         if (!defined $page) {
5213                 $page = 0;
5214         }
5215         my $refs = git_get_references();
5216
5217         my @commitlist = parse_commits($hash, 101, (100 * $page));
5218
5219         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5220
5221         my ($patch_max) = gitweb_get_feature('patches');
5222         if ($patch_max) {
5223                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5224                         $paging_nav .= " &sdot; " .
5225                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5226                                         "patches");
5227                 }
5228         }
5229
5230         git_header_html();
5231         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5232
5233         if (!@commitlist) {
5234                 my %co = parse_commit($hash);
5235
5236                 git_print_header_div('summary', $project);
5237                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5238         }
5239         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5240         for (my $i = 0; $i <= $to; $i++) {
5241                 my %co = %{$commitlist[$i]};
5242                 next if !%co;
5243                 my $commit = $co{'id'};
5244                 my $ref = format_ref_marker($refs, $commit);
5245                 my %ad = parse_date($co{'author_epoch'});
5246                 git_print_header_div('commit',
5247                                "<span class=\"age\">$co{'age_string'}</span>" .
5248                                esc_html($co{'title'}) . $ref,
5249                                $commit);
5250                 print "<div class=\"title_text\">\n" .
5251                       "<div class=\"log_link\">\n" .
5252                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5253                       " | " .
5254                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5255                       " | " .
5256                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5257                       "<br/>\n" .
5258                       "</div>\n";
5259                       git_print_authorship(\%co, -tag => 'span');
5260                       print "<br/>\n</div>\n";
5261
5262                 print "<div class=\"log_body\">\n";
5263                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5264                 print "</div>\n";
5265         }
5266         if ($#commitlist >= 100) {
5267                 print "<div class=\"page_nav\">\n";
5268                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5269                                -accesskey => "n", -title => "Alt-n"}, "next");
5270                 print "</div>\n";
5271         }
5272         git_footer_html();
5273 }
5274
5275 sub git_commit {
5276         $hash ||= $hash_base || "HEAD";
5277         my %co = parse_commit($hash)
5278             or die_error(404, "Unknown commit object");
5279
5280         my $parent  = $co{'parent'};
5281         my $parents = $co{'parents'}; # listref
5282
5283         # we need to prepare $formats_nav before any parameter munging
5284         my $formats_nav;
5285         if (!defined $parent) {
5286                 # --root commitdiff
5287                 $formats_nav .= '(initial)';
5288         } elsif (@$parents == 1) {
5289                 # single parent commit
5290                 $formats_nav .=
5291                         '(parent: ' .
5292                         $cgi->a({-href => href(action=>"commit",
5293                                                hash=>$parent)},
5294                                 esc_html(substr($parent, 0, 7))) .
5295                         ')';
5296         } else {
5297                 # merge commit
5298                 $formats_nav .=
5299                         '(merge: ' .
5300                         join(' ', map {
5301                                 $cgi->a({-href => href(action=>"commit",
5302                                                        hash=>$_)},
5303                                         esc_html(substr($_, 0, 7)));
5304                         } @$parents ) .
5305                         ')';
5306         }
5307         if (gitweb_check_feature('patches')) {
5308                 $formats_nav .= " | " .
5309                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5310                                 "patch");
5311         }
5312
5313         if (!defined $parent) {
5314                 $parent = "--root";
5315         }
5316         my @difftree;
5317         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5318                 @diff_opts,
5319                 (@$parents <= 1 ? $parent : '-c'),
5320                 $hash, "--"
5321                 or die_error(500, "Open git-diff-tree failed");
5322         @difftree = map { chomp; $_ } <$fd>;
5323         close $fd or die_error(404, "Reading git-diff-tree failed");
5324
5325         # non-textual hash id's can be cached
5326         my $expires;
5327         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5328                 $expires = "+1d";
5329         }
5330         my $refs = git_get_references();
5331         my $ref = format_ref_marker($refs, $co{'id'});
5332
5333         git_header_html(undef, $expires);
5334         git_print_page_nav('commit', '',
5335                            $hash, $co{'tree'}, $hash,
5336                            $formats_nav);
5337
5338         if (defined $co{'parent'}) {
5339                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5340         } else {
5341                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5342         }
5343         print "<div class=\"title_text\">\n" .
5344               "<table class=\"object_header\">\n";
5345         git_print_authorship_rows(\%co);
5346         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5347         print "<tr>" .
5348               "<td>tree</td>" .
5349               "<td class=\"sha1\">" .
5350               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5351                        class => "list"}, $co{'tree'}) .
5352               "</td>" .
5353               "<td class=\"link\">" .
5354               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5355                       "tree");
5356         my $snapshot_links = format_snapshot_links($hash);
5357         if (defined $snapshot_links) {
5358                 print " | " . $snapshot_links;
5359         }
5360         print "</td>" .
5361               "</tr>\n";
5362
5363         foreach my $par (@$parents) {
5364                 print "<tr>" .
5365                       "<td>parent</td>" .
5366                       "<td class=\"sha1\">" .
5367                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5368                                class => "list"}, $par) .
5369                       "</td>" .
5370                       "<td class=\"link\">" .
5371                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5372                       " | " .
5373                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5374                       "</td>" .
5375                       "</tr>\n";
5376         }
5377         print "</table>".
5378               "</div>\n";
5379
5380         print "<div class=\"page_body\">\n";
5381         git_print_log($co{'comment'});
5382         print "</div>\n";
5383
5384         git_difftree_body(\@difftree, $hash, @$parents);
5385
5386         git_footer_html();
5387 }
5388
5389 sub git_object {
5390         # object is defined by:
5391         # - hash or hash_base alone
5392         # - hash_base and file_name
5393         my $type;
5394
5395         # - hash or hash_base alone
5396         if ($hash || ($hash_base && !defined $file_name)) {
5397                 my $object_id = $hash || $hash_base;
5398
5399                 open my $fd, "-|", quote_command(
5400                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5401                         or die_error(404, "Object does not exist");
5402                 $type = <$fd>;
5403                 chomp $type;
5404                 close $fd
5405                         or die_error(404, "Object does not exist");
5406
5407         # - hash_base and file_name
5408         } elsif ($hash_base && defined $file_name) {
5409                 $file_name =~ s,/+$,,;
5410
5411                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5412                         or die_error(404, "Base object does not exist");
5413
5414                 # here errors should not hapen
5415                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5416                         or die_error(500, "Open git-ls-tree failed");
5417                 my $line = <$fd>;
5418                 close $fd;
5419
5420                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5421                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5422                         die_error(404, "File or directory for given base does not exist");
5423                 }
5424                 $type = $2;
5425                 $hash = $3;
5426         } else {
5427                 die_error(400, "Not enough information to find object");
5428         }
5429
5430         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5431                                           hash=>$hash, hash_base=>$hash_base,
5432                                           file_name=>$file_name),
5433                              -status => '302 Found');
5434 }
5435
5436 sub git_blobdiff {
5437         my $format = shift || 'html';
5438
5439         my $fd;
5440         my @difftree;
5441         my %diffinfo;
5442         my $expires;
5443
5444         # preparing $fd and %diffinfo for git_patchset_body
5445         # new style URI
5446         if (defined $hash_base && defined $hash_parent_base) {
5447                 if (defined $file_name) {
5448                         # read raw output
5449                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5450                                 $hash_parent_base, $hash_base,
5451                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5452                                 or die_error(500, "Open git-diff-tree failed");
5453                         @difftree = map { chomp; $_ } <$fd>;
5454                         close $fd
5455                                 or die_error(404, "Reading git-diff-tree failed");
5456                         @difftree
5457                                 or die_error(404, "Blob diff not found");
5458
5459                 } elsif (defined $hash &&
5460                          $hash =~ /[0-9a-fA-F]{40}/) {
5461                         # try to find filename from $hash
5462
5463                         # read filtered raw output
5464                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5465                                 $hash_parent_base, $hash_base, "--"
5466                                 or die_error(500, "Open git-diff-tree failed");
5467                         @difftree =
5468                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5469                                 # $hash == to_id
5470                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5471                                 map { chomp; $_ } <$fd>;
5472                         close $fd
5473                                 or die_error(404, "Reading git-diff-tree failed");
5474                         @difftree
5475                                 or die_error(404, "Blob diff not found");
5476
5477                 } else {
5478                         die_error(400, "Missing one of the blob diff parameters");
5479                 }
5480
5481                 if (@difftree > 1) {
5482                         die_error(400, "Ambiguous blob diff specification");
5483                 }
5484
5485                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5486                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5487                 $file_name   ||= $diffinfo{'to_file'};
5488
5489                 $hash_parent ||= $diffinfo{'from_id'};
5490                 $hash        ||= $diffinfo{'to_id'};
5491
5492                 # non-textual hash id's can be cached
5493                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5494                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5495                         $expires = '+1d';
5496                 }
5497
5498                 # open patch output
5499                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5500                         '-p', ($format eq 'html' ? "--full-index" : ()),
5501                         $hash_parent_base, $hash_base,
5502                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5503                         or die_error(500, "Open git-diff-tree failed");
5504         }
5505
5506         # old/legacy style URI -- not generated anymore since 1.4.3.
5507         if (!%diffinfo) {
5508                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5509         }
5510
5511         # header
5512         if ($format eq 'html') {
5513                 my $formats_nav =
5514                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5515                                 "raw");
5516                 git_header_html(undef, $expires);
5517                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5518                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5519                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5520                 } else {
5521                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5522                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5523                 }
5524                 if (defined $file_name) {
5525                         git_print_page_path($file_name, "blob", $hash_base);
5526                 } else {
5527                         print "<div class=\"page_path\"></div>\n";
5528                 }
5529
5530         } elsif ($format eq 'plain') {
5531                 print $cgi->header(
5532                         -type => 'text/plain',
5533                         -charset => 'utf-8',
5534                         -expires => $expires,
5535                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5536
5537                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5538
5539         } else {
5540                 die_error(400, "Unknown blobdiff format");
5541         }
5542
5543         # patch
5544         if ($format eq 'html') {
5545                 print "<div class=\"page_body\">\n";
5546
5547                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5548                 close $fd;
5549
5550                 print "</div>\n"; # class="page_body"
5551                 git_footer_html();
5552
5553         } else {
5554                 while (my $line = <$fd>) {
5555                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5556                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5557
5558                         print $line;
5559
5560                         last if $line =~ m!^\+\+\+!;
5561                 }
5562                 local $/ = undef;
5563                 print <$fd>;
5564                 close $fd;
5565         }
5566 }
5567
5568 sub git_blobdiff_plain {
5569         git_blobdiff('plain');
5570 }
5571
5572 sub git_commitdiff {
5573         my %params = @_;
5574         my $format = $params{-format} || 'html';
5575
5576         my ($patch_max) = gitweb_get_feature('patches');
5577         if ($format eq 'patch') {
5578                 die_error(403, "Patch view not allowed") unless $patch_max;
5579         }
5580
5581         $hash ||= $hash_base || "HEAD";
5582         my %co = parse_commit($hash)
5583             or die_error(404, "Unknown commit object");
5584
5585         # choose format for commitdiff for merge
5586         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5587                 $hash_parent = '--cc';
5588         }
5589         # we need to prepare $formats_nav before almost any parameter munging
5590         my $formats_nav;
5591         if ($format eq 'html') {
5592                 $formats_nav =
5593                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5594                                 "raw");
5595                 if ($patch_max) {
5596                         $formats_nav .= " | " .
5597                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5598                                         "patch");
5599                 }
5600
5601                 if (defined $hash_parent &&
5602                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5603                         # commitdiff with two commits given
5604                         my $hash_parent_short = $hash_parent;
5605                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5606                                 $hash_parent_short = substr($hash_parent, 0, 7);
5607                         }
5608                         $formats_nav .=
5609                                 ' (from';
5610                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5611                                 if ($co{'parents'}[$i] eq $hash_parent) {
5612                                         $formats_nav .= ' parent ' . ($i+1);
5613                                         last;
5614                                 }
5615                         }
5616                         $formats_nav .= ': ' .
5617                                 $cgi->a({-href => href(action=>"commitdiff",
5618                                                        hash=>$hash_parent)},
5619                                         esc_html($hash_parent_short)) .
5620                                 ')';
5621                 } elsif (!$co{'parent'}) {
5622                         # --root commitdiff
5623                         $formats_nav .= ' (initial)';
5624                 } elsif (scalar @{$co{'parents'}} == 1) {
5625                         # single parent commit
5626                         $formats_nav .=
5627                                 ' (parent: ' .
5628                                 $cgi->a({-href => href(action=>"commitdiff",
5629                                                        hash=>$co{'parent'})},
5630                                         esc_html(substr($co{'parent'}, 0, 7))) .
5631                                 ')';
5632                 } else {
5633                         # merge commit
5634                         if ($hash_parent eq '--cc') {
5635                                 $formats_nav .= ' | ' .
5636                                         $cgi->a({-href => href(action=>"commitdiff",
5637                                                                hash=>$hash, hash_parent=>'-c')},
5638                                                 'combined');
5639                         } else { # $hash_parent eq '-c'
5640                                 $formats_nav .= ' | ' .
5641                                         $cgi->a({-href => href(action=>"commitdiff",
5642                                                                hash=>$hash, hash_parent=>'--cc')},
5643                                                 'compact');
5644                         }
5645                         $formats_nav .=
5646                                 ' (merge: ' .
5647                                 join(' ', map {
5648                                         $cgi->a({-href => href(action=>"commitdiff",
5649                                                                hash=>$_)},
5650                                                 esc_html(substr($_, 0, 7)));
5651                                 } @{$co{'parents'}} ) .
5652                                 ')';
5653                 }
5654         }
5655
5656         my $hash_parent_param = $hash_parent;
5657         if (!defined $hash_parent_param) {
5658                 # --cc for multiple parents, --root for parentless
5659                 $hash_parent_param =
5660                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5661         }
5662
5663         # read commitdiff
5664         my $fd;
5665         my @difftree;
5666         if ($format eq 'html') {
5667                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5668                         "--no-commit-id", "--patch-with-raw", "--full-index",
5669                         $hash_parent_param, $hash, "--"
5670                         or die_error(500, "Open git-diff-tree failed");
5671
5672                 while (my $line = <$fd>) {
5673                         chomp $line;
5674                         # empty line ends raw part of diff-tree output
5675                         last unless $line;
5676                         push @difftree, scalar parse_difftree_raw_line($line);
5677                 }
5678
5679         } elsif ($format eq 'plain') {
5680                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5681                         '-p', $hash_parent_param, $hash, "--"
5682                         or die_error(500, "Open git-diff-tree failed");
5683         } elsif ($format eq 'patch') {
5684                 # For commit ranges, we limit the output to the number of
5685                 # patches specified in the 'patches' feature.
5686                 # For single commits, we limit the output to a single patch,
5687                 # diverging from the git-format-patch default.
5688                 my @commit_spec = ();
5689                 if ($hash_parent) {
5690                         if ($patch_max > 0) {
5691                                 push @commit_spec, "-$patch_max";
5692                         }
5693                         push @commit_spec, '-n', "$hash_parent..$hash";
5694                 } else {
5695                         if ($params{-single}) {
5696                                 push @commit_spec, '-1';
5697                         } else {
5698                                 if ($patch_max > 0) {
5699                                         push @commit_spec, "-$patch_max";
5700                                 }
5701                                 push @commit_spec, "-n";
5702                         }
5703                         push @commit_spec, '--root', $hash;
5704                 }
5705                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5706                         '--stdout', @commit_spec
5707                         or die_error(500, "Open git-format-patch failed");
5708         } else {
5709                 die_error(400, "Unknown commitdiff format");
5710         }
5711
5712         # non-textual hash id's can be cached
5713         my $expires;
5714         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5715                 $expires = "+1d";
5716         }
5717
5718         # write commit message
5719         if ($format eq 'html') {
5720                 my $refs = git_get_references();
5721                 my $ref = format_ref_marker($refs, $co{'id'});
5722
5723                 git_header_html(undef, $expires);
5724                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5725                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5726                 print "<div class=\"title_text\">\n" .
5727                       "<table class=\"object_header\">\n";
5728                 git_print_authorship_rows(\%co);
5729                 print "</table>".
5730                       "</div>\n";
5731                 print "<div class=\"page_body\">\n";
5732                 if (@{$co{'comment'}} > 1) {
5733                         print "<div class=\"log\">\n";
5734                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5735                         print "</div>\n"; # class="log"
5736                 }
5737
5738         } elsif ($format eq 'plain') {
5739                 my $refs = git_get_references("tags");
5740                 my $tagname = git_get_rev_name_tags($hash);
5741                 my $filename = basename($project) . "-$hash.patch";
5742
5743                 print $cgi->header(
5744                         -type => 'text/plain',
5745                         -charset => 'utf-8',
5746                         -expires => $expires,
5747                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5748                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5749                 print "From: " . to_utf8($co{'author'}) . "\n";
5750                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5751                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5752
5753                 print "X-Git-Tag: $tagname\n" if $tagname;
5754                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5755
5756                 foreach my $line (@{$co{'comment'}}) {
5757                         print to_utf8($line) . "\n";
5758                 }
5759                 print "---\n\n";
5760         } elsif ($format eq 'patch') {
5761                 my $filename = basename($project) . "-$hash.patch";
5762
5763                 print $cgi->header(
5764                         -type => 'text/plain',
5765                         -charset => 'utf-8',
5766                         -expires => $expires,
5767                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5768         }
5769
5770         # write patch
5771         if ($format eq 'html') {
5772                 my $use_parents = !defined $hash_parent ||
5773                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5774                 git_difftree_body(\@difftree, $hash,
5775                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5776                 print "<br/>\n";
5777
5778                 git_patchset_body($fd, \@difftree, $hash,
5779                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5780                 close $fd;
5781                 print "</div>\n"; # class="page_body"
5782                 git_footer_html();
5783
5784         } elsif ($format eq 'plain') {
5785                 local $/ = undef;
5786                 print <$fd>;
5787                 close $fd
5788                         or print "Reading git-diff-tree failed\n";
5789         } elsif ($format eq 'patch') {
5790                 local $/ = undef;
5791                 print <$fd>;
5792                 close $fd
5793                         or print "Reading git-format-patch failed\n";
5794         }
5795 }
5796
5797 sub git_commitdiff_plain {
5798         git_commitdiff(-format => 'plain');
5799 }
5800
5801 # format-patch-style patches
5802 sub git_patch {
5803         git_commitdiff(-format => 'patch', -single=> 1);
5804 }
5805
5806 sub git_patches {
5807         git_commitdiff(-format => 'patch');
5808 }
5809
5810 sub git_history {
5811         if (!defined $hash_base) {
5812                 $hash_base = git_get_head_hash($project);
5813         }
5814         if (!defined $page) {
5815                 $page = 0;
5816         }
5817         my $ftype;
5818         my %co = parse_commit($hash_base)
5819             or die_error(404, "Unknown commit object");
5820
5821         my $refs = git_get_references();
5822         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5823
5824         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5825                                        $file_name, "--full-history")
5826             or die_error(404, "No such file or directory on given branch");
5827
5828         if (!defined $hash && defined $file_name) {
5829                 # some commits could have deleted file in question,
5830                 # and not have it in tree, but one of them has to have it
5831                 for (my $i = 0; $i <= @commitlist; $i++) {
5832                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5833                         last if defined $hash;
5834                 }
5835         }
5836         if (defined $hash) {
5837                 $ftype = git_get_type($hash);
5838         }
5839         if (!defined $ftype) {
5840                 die_error(500, "Unknown type of object");
5841         }
5842
5843         my $paging_nav = '';
5844         if ($page > 0) {
5845                 $paging_nav .=
5846                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5847                                                file_name=>$file_name)},
5848                                 "first");
5849                 $paging_nav .= " &sdot; " .
5850                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5851                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5852         } else {
5853                 $paging_nav .= "first";
5854                 $paging_nav .= " &sdot; prev";
5855         }
5856         my $next_link = '';
5857         if ($#commitlist >= 100) {
5858                 $next_link =
5859                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5860                                  -accesskey => "n", -title => "Alt-n"}, "next");
5861                 $paging_nav .= " &sdot; $next_link";
5862         } else {
5863                 $paging_nav .= " &sdot; next";
5864         }
5865
5866         git_header_html();
5867         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5868         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5869         git_print_page_path($file_name, $ftype, $hash_base);
5870
5871         git_history_body(\@commitlist, 0, 99,
5872                          $refs, $hash_base, $ftype, $next_link);
5873
5874         git_footer_html();
5875 }
5876
5877 sub git_search {
5878         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5879         if (!defined $searchtext) {
5880                 die_error(400, "Text field is empty");
5881         }
5882         if (!defined $hash) {
5883                 $hash = git_get_head_hash($project);
5884         }
5885         my %co = parse_commit($hash);
5886         if (!%co) {
5887                 die_error(404, "Unknown commit object");
5888         }
5889         if (!defined $page) {
5890                 $page = 0;
5891         }
5892
5893         $searchtype ||= 'commit';
5894         if ($searchtype eq 'pickaxe') {
5895                 # pickaxe may take all resources of your box and run for several minutes
5896                 # with every query - so decide by yourself how public you make this feature
5897                 gitweb_check_feature('pickaxe')
5898                     or die_error(403, "Pickaxe is disabled");
5899         }
5900         if ($searchtype eq 'grep') {
5901                 gitweb_check_feature('grep')
5902                     or die_error(403, "Grep is disabled");
5903         }
5904
5905         git_header_html();
5906
5907         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5908                 my $greptype;
5909                 if ($searchtype eq 'commit') {
5910                         $greptype = "--grep=";
5911                 } elsif ($searchtype eq 'author') {
5912                         $greptype = "--author=";
5913                 } elsif ($searchtype eq 'committer') {
5914                         $greptype = "--committer=";
5915                 }
5916                 $greptype .= $searchtext;
5917                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5918                                                $greptype, '--regexp-ignore-case',
5919                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5920
5921                 my $paging_nav = '';
5922                 if ($page > 0) {
5923                         $paging_nav .=
5924                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5925                                                        searchtext=>$searchtext,
5926                                                        searchtype=>$searchtype)},
5927                                         "first");
5928                         $paging_nav .= " &sdot; " .
5929                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5930                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5931                 } else {
5932                         $paging_nav .= "first";
5933                         $paging_nav .= " &sdot; prev";
5934                 }
5935                 my $next_link = '';
5936                 if ($#commitlist >= 100) {
5937                         $next_link =
5938                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5939                                          -accesskey => "n", -title => "Alt-n"}, "next");
5940                         $paging_nav .= " &sdot; $next_link";
5941                 } else {
5942                         $paging_nav .= " &sdot; next";
5943                 }
5944
5945                 if ($#commitlist >= 100) {
5946                 }
5947
5948                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5949                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5950                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5951         }
5952
5953         if ($searchtype eq 'pickaxe') {
5954                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5955                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5956
5957                 print "<table class=\"pickaxe search\">\n";
5958                 my $alternate = 1;
5959                 local $/ = "\n";
5960                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5961                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5962                         ($search_use_regexp ? '--pickaxe-regex' : ());
5963                 undef %co;
5964                 my @files;
5965                 while (my $line = <$fd>) {
5966                         chomp $line;
5967                         next unless $line;
5968
5969                         my %set = parse_difftree_raw_line($line);
5970                         if (defined $set{'commit'}) {
5971                                 # finish previous commit
5972                                 if (%co) {
5973                                         print "</td>\n" .
5974                                               "<td class=\"link\">" .
5975                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5976                                               " | " .
5977                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5978                                         print "</td>\n" .
5979                                               "</tr>\n";
5980                                 }
5981
5982                                 if ($alternate) {
5983                                         print "<tr class=\"dark\">\n";
5984                                 } else {
5985                                         print "<tr class=\"light\">\n";
5986                                 }
5987                                 $alternate ^= 1;
5988                                 %co = parse_commit($set{'commit'});
5989                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5990                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5991                                       "<td><i>$author</i></td>\n" .
5992                                       "<td>" .
5993                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5994                                               -class => "list subject"},
5995                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5996                         } elsif (defined $set{'to_id'}) {
5997                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5998
5999                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6000                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6001                                               -class => "list"},
6002                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6003                                       "<br/>\n";
6004                         }
6005                 }
6006                 close $fd;
6007
6008                 # finish last commit (warning: repetition!)
6009                 if (%co) {
6010                         print "</td>\n" .
6011                               "<td class=\"link\">" .
6012                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6013                               " | " .
6014                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6015                         print "</td>\n" .
6016                               "</tr>\n";
6017                 }
6018
6019                 print "</table>\n";
6020         }
6021
6022         if ($searchtype eq 'grep') {
6023                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6024                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6025
6026                 print "<table class=\"grep_search\">\n";
6027                 my $alternate = 1;
6028                 my $matches = 0;
6029                 local $/ = "\n";
6030                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6031                         $search_use_regexp ? ('-E', '-i') : '-F',
6032                         $searchtext, $co{'tree'};
6033                 my $lastfile = '';
6034                 while (my $line = <$fd>) {
6035                         chomp $line;
6036                         my ($file, $lno, $ltext, $binary);
6037                         last if ($matches++ > 1000);
6038                         if ($line =~ /^Binary file (.+) matches$/) {
6039                                 $file = $1;
6040                                 $binary = 1;
6041                         } else {
6042                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6043                         }
6044                         if ($file ne $lastfile) {
6045                                 $lastfile and print "</td></tr>\n";
6046                                 if ($alternate++) {
6047                                         print "<tr class=\"dark\">\n";
6048                                 } else {
6049                                         print "<tr class=\"light\">\n";
6050                                 }
6051                                 print "<td class=\"list\">".
6052                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6053                                                                file_name=>"$file"),
6054                                                 -class => "list"}, esc_path($file));
6055                                 print "</td><td>\n";
6056                                 $lastfile = $file;
6057                         }
6058                         if ($binary) {
6059                                 print "<div class=\"binary\">Binary file</div>\n";
6060                         } else {
6061                                 $ltext = untabify($ltext);
6062                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6063                                         $ltext = esc_html($1, -nbsp=>1);
6064                                         $ltext .= '<span class="match">';
6065                                         $ltext .= esc_html($2, -nbsp=>1);
6066                                         $ltext .= '</span>';
6067                                         $ltext .= esc_html($3, -nbsp=>1);
6068                                 } else {
6069                                         $ltext = esc_html($ltext, -nbsp=>1);
6070                                 }
6071                                 print "<div class=\"pre\">" .
6072                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6073                                                                file_name=>"$file").'#l'.$lno,
6074                                                 -class => "linenr"}, sprintf('%4i', $lno))
6075                                         . ' ' .  $ltext . "</div>\n";
6076                         }
6077                 }
6078                 if ($lastfile) {
6079                         print "</td></tr>\n";
6080                         if ($matches > 1000) {
6081                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6082                         }
6083                 } else {
6084                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6085                 }
6086                 close $fd;
6087
6088                 print "</table>\n";
6089         }
6090         git_footer_html();
6091 }
6092
6093 sub git_search_help {
6094         git_header_html();
6095         git_print_page_nav('','', $hash,$hash,$hash);
6096         print <<EOT;
6097 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6098 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6099 the pattern entered is recognized as the POSIX extended
6100 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6101 insensitive).</p>
6102 <dl>
6103 <dt><b>commit</b></dt>
6104 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6105 EOT
6106         my $have_grep = gitweb_check_feature('grep');
6107         if ($have_grep) {
6108                 print <<EOT;
6109 <dt><b>grep</b></dt>
6110 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6111     a different one) are searched for the given pattern. On large trees, this search can take
6112 a while and put some strain on the server, so please use it with some consideration. Note that
6113 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6114 case-sensitive.</dd>
6115 EOT
6116         }
6117         print <<EOT;
6118 <dt><b>author</b></dt>
6119 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6120 <dt><b>committer</b></dt>
6121 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6122 EOT
6123         my $have_pickaxe = gitweb_check_feature('pickaxe');
6124         if ($have_pickaxe) {
6125                 print <<EOT;
6126 <dt><b>pickaxe</b></dt>
6127 <dd>All commits that caused the string to appear or disappear from any file (changes that
6128 added, removed or "modified" the string) will be listed. This search can take a while and
6129 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6130 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6131 EOT
6132         }
6133         print "</dl>\n";
6134         git_footer_html();
6135 }
6136
6137 sub git_shortlog {
6138         my $head = git_get_head_hash($project);
6139         if (!defined $hash) {
6140                 $hash = $head;
6141         }
6142         if (!defined $page) {
6143                 $page = 0;
6144         }
6145         my $refs = git_get_references();
6146
6147         my $commit_hash = $hash;
6148         if (defined $hash_parent) {
6149                 $commit_hash = "$hash_parent..$hash";
6150         }
6151         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6152
6153         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6154         my $next_link = '';
6155         if ($#commitlist >= 100) {
6156                 $next_link =
6157                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6158                                  -accesskey => "n", -title => "Alt-n"}, "next");
6159         }
6160         my $patch_max = gitweb_check_feature('patches');
6161         if ($patch_max) {
6162                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6163                         $paging_nav .= " &sdot; " .
6164                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6165                                         "patches");
6166                 }
6167         }
6168
6169         git_header_html();
6170         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6171         git_print_header_div('summary', $project);
6172
6173         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6174
6175         git_footer_html();
6176 }
6177
6178 ## ......................................................................
6179 ## feeds (RSS, Atom; OPML)
6180
6181 sub git_feed {
6182         my $format = shift || 'atom';
6183         my $have_blame = gitweb_check_feature('blame');
6184
6185         # Atom: http://www.atomenabled.org/developers/syndication/
6186         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6187         if ($format ne 'rss' && $format ne 'atom') {
6188                 die_error(400, "Unknown web feed format");
6189         }
6190
6191         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6192         my $head = $hash || 'HEAD';
6193         my @commitlist = parse_commits($head, 150, 0, $file_name);
6194
6195         my %latest_commit;
6196         my %latest_date;
6197         my $content_type = "application/$format+xml";
6198         if (defined $cgi->http('HTTP_ACCEPT') &&
6199                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6200                 # browser (feed reader) prefers text/xml
6201                 $content_type = 'text/xml';
6202         }
6203         if (defined($commitlist[0])) {
6204                 %latest_commit = %{$commitlist[0]};
6205                 my $latest_epoch = $latest_commit{'committer_epoch'};
6206                 %latest_date   = parse_date($latest_epoch);
6207                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6208                 if (defined $if_modified) {
6209                         my $since;
6210                         if (eval { require HTTP::Date; 1; }) {
6211                                 $since = HTTP::Date::str2time($if_modified);
6212                         } elsif (eval { require Time::ParseDate; 1; }) {
6213                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6214                         }
6215                         if (defined $since && $latest_epoch <= $since) {
6216                                 print $cgi->header(
6217                                         -type => $content_type,
6218                                         -charset => 'utf-8',
6219                                         -last_modified => $latest_date{'rfc2822'},
6220                                         -status => '304 Not Modified');
6221                                 return;
6222                         }
6223                 }
6224                 print $cgi->header(
6225                         -type => $content_type,
6226                         -charset => 'utf-8',
6227                         -last_modified => $latest_date{'rfc2822'});
6228         } else {
6229                 print $cgi->header(
6230                         -type => $content_type,
6231                         -charset => 'utf-8');
6232         }
6233
6234         # Optimization: skip generating the body if client asks only
6235         # for Last-Modified date.
6236         return if ($cgi->request_method() eq 'HEAD');
6237
6238         # header variables
6239         my $title = "$site_name - $project/$action";
6240         my $feed_type = 'log';
6241         if (defined $hash) {
6242                 $title .= " - '$hash'";
6243                 $feed_type = 'branch log';
6244                 if (defined $file_name) {
6245                         $title .= " :: $file_name";
6246                         $feed_type = 'history';
6247                 }
6248         } elsif (defined $file_name) {
6249                 $title .= " - $file_name";
6250                 $feed_type = 'history';
6251         }
6252         $title .= " $feed_type";
6253         my $descr = git_get_project_description($project);
6254         if (defined $descr) {
6255                 $descr = esc_html($descr);
6256         } else {
6257                 $descr = "$project " .
6258                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6259                          " feed";
6260         }
6261         my $owner = git_get_project_owner($project);
6262         $owner = esc_html($owner);
6263
6264         #header
6265         my $alt_url;
6266         if (defined $file_name) {
6267                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6268         } elsif (defined $hash) {
6269                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6270         } else {
6271                 $alt_url = href(-full=>1, action=>"summary");
6272         }
6273         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6274         if ($format eq 'rss') {
6275                 print <<XML;
6276 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6277 <channel>
6278 XML
6279                 print "<title>$title</title>\n" .
6280                       "<link>$alt_url</link>\n" .
6281                       "<description>$descr</description>\n" .
6282                       "<language>en</language>\n" .
6283                       # project owner is responsible for 'editorial' content
6284                       "<managingEditor>$owner</managingEditor>\n";
6285                 if (defined $logo || defined $favicon) {
6286                         # prefer the logo to the favicon, since RSS
6287                         # doesn't allow both
6288                         my $img = esc_url($logo || $favicon);
6289                         print "<image>\n" .
6290                               "<url>$img</url>\n" .
6291                               "<title>$title</title>\n" .
6292                               "<link>$alt_url</link>\n" .
6293                               "</image>\n";
6294                 }
6295                 if (%latest_date) {
6296                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6297                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6298                 }
6299                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6300         } elsif ($format eq 'atom') {
6301                 print <<XML;
6302 <feed xmlns="http://www.w3.org/2005/Atom">
6303 XML
6304                 print "<title>$title</title>\n" .
6305                       "<subtitle>$descr</subtitle>\n" .
6306                       '<link rel="alternate" type="text/html" href="' .
6307                       $alt_url . '" />' . "\n" .
6308                       '<link rel="self" type="' . $content_type . '" href="' .
6309                       $cgi->self_url() . '" />' . "\n" .
6310                       "<id>" . href(-full=>1) . "</id>\n" .
6311                       # use project owner for feed author
6312                       "<author><name>$owner</name></author>\n";
6313                 if (defined $favicon) {
6314                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6315                 }
6316                 if (defined $logo_url) {
6317                         # not twice as wide as tall: 72 x 27 pixels
6318                         print "<logo>" . esc_url($logo) . "</logo>\n";
6319                 }
6320                 if (! %latest_date) {
6321                         # dummy date to keep the feed valid until commits trickle in:
6322                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6323                 } else {
6324                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6325                 }
6326                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6327         }
6328
6329         # contents
6330         for (my $i = 0; $i <= $#commitlist; $i++) {
6331                 my %co = %{$commitlist[$i]};
6332                 my $commit = $co{'id'};
6333                 # we read 150, we always show 30 and the ones more recent than 48 hours
6334                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6335                         last;
6336                 }
6337                 my %cd = parse_date($co{'author_epoch'});
6338
6339                 # get list of changed files
6340                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6341                         $co{'parent'} || "--root",
6342                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6343                         or next;
6344                 my @difftree = map { chomp; $_ } <$fd>;
6345                 close $fd
6346                         or next;
6347
6348                 # print element (entry, item)
6349                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6350                 if ($format eq 'rss') {
6351                         print "<item>\n" .
6352                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6353                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6354                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6355                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6356                               "<link>$co_url</link>\n" .
6357                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6358                               "<content:encoded>" .
6359                               "<![CDATA[\n";
6360                 } elsif ($format eq 'atom') {
6361                         print "<entry>\n" .
6362                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6363                               "<updated>$cd{'iso-8601'}</updated>\n" .
6364                               "<author>\n" .
6365                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6366                         if ($co{'author_email'}) {
6367                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6368                         }
6369                         print "</author>\n" .
6370                               # use committer for contributor
6371                               "<contributor>\n" .
6372                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6373                         if ($co{'committer_email'}) {
6374                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6375                         }
6376                         print "</contributor>\n" .
6377                               "<published>$cd{'iso-8601'}</published>\n" .
6378                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6379                               "<id>$co_url</id>\n" .
6380                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6381                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6382                 }
6383                 my $comment = $co{'comment'};
6384                 print "<pre>\n";
6385                 foreach my $line (@$comment) {
6386                         $line = esc_html($line);
6387                         print "$line\n";
6388                 }
6389                 print "</pre><ul>\n";
6390                 foreach my $difftree_line (@difftree) {
6391                         my %difftree = parse_difftree_raw_line($difftree_line);
6392                         next if !$difftree{'from_id'};
6393
6394                         my $file = $difftree{'file'} || $difftree{'to_file'};
6395
6396                         print "<li>" .
6397                               "[" .
6398                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6399                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6400                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6401                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6402                                       -title => "diff"}, 'D');
6403                         if ($have_blame) {
6404                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6405                                                              file_name=>$file, hash_base=>$commit),
6406                                               -title => "blame"}, 'B');
6407                         }
6408                         # if this is not a feed of a file history
6409                         if (!defined $file_name || $file_name ne $file) {
6410                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6411                                                              file_name=>$file, hash=>$commit),
6412                                               -title => "history"}, 'H');
6413                         }
6414                         $file = esc_path($file);
6415                         print "] ".
6416                               "$file</li>\n";
6417                 }
6418                 if ($format eq 'rss') {
6419                         print "</ul>]]>\n" .
6420                               "</content:encoded>\n" .
6421                               "</item>\n";
6422                 } elsif ($format eq 'atom') {
6423                         print "</ul>\n</div>\n" .
6424                               "</content>\n" .
6425                               "</entry>\n";
6426                 }
6427         }
6428
6429         # end of feed
6430         if ($format eq 'rss') {
6431                 print "</channel>\n</rss>\n";
6432         } elsif ($format eq 'atom') {
6433                 print "</feed>\n";
6434         }
6435 }
6436
6437 sub git_rss {
6438         git_feed('rss');
6439 }
6440
6441 sub git_atom {
6442         git_feed('atom');
6443 }
6444
6445 sub git_opml {
6446         my @list = git_get_projects_list();
6447
6448         print $cgi->header(
6449                 -type => 'text/xml',
6450                 -charset => 'utf-8',
6451                 -content_disposition => 'inline; filename="opml.xml"');
6452
6453         print <<XML;
6454 <?xml version="1.0" encoding="utf-8"?>
6455 <opml version="1.0">
6456 <head>
6457   <title>$site_name OPML Export</title>
6458 </head>
6459 <body>
6460 <outline text="git RSS feeds">
6461 XML
6462
6463         foreach my $pr (@list) {
6464                 my %proj = %$pr;
6465                 my $head = git_get_head_hash($proj{'path'});
6466                 if (!defined $head) {
6467                         next;
6468                 }
6469                 $git_dir = "$projectroot/$proj{'path'}";
6470                 my %co = parse_commit($head);
6471                 if (!%co) {
6472                         next;
6473                 }
6474
6475                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6476                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6477                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6478                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6479         }
6480         print <<XML;
6481 </outline>
6482 </body>
6483 </opml>
6484 XML
6485 }