gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git-scm.com/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)
 164         #       'disabled' => boolean (optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'txz' => {
 181                 'display' => 'tar.xz',
 182                 'type' => 'application/x-xz',
 183                 'suffix' => '.tar.xz',
 184                 'format' => 'tar',
 185                 'compressor' => ['xz'],
 186                 'disabled' => 1},
 187
 188         'zip' => {
 189                 'display' => 'zip',
 190                 'type' => 'application/x-zip',
 191                 'suffix' => '.zip',
 192                 'format' => 'zip'},
 193 );
 194
 195 # Aliases so we understand old gitweb.snapshot values in repository
 196 # configuration.
 197 our %known_snapshot_format_aliases = (
 198         'gzip'  => 'tgz',
 199         'bzip2' => 'tbz2',
 200         'xz'    => 'txz',
 201
 202         # backward compatibility: legacy gitweb config support
 203         'x-gzip' => undef, 'gz' => undef,
 204         'x-bzip2' => undef, 'bz2' => undef,
 205         'x-zip' => undef, '' => undef,
 206 );
 207
 208 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 209 # are changed, it may be appropriate to change these values too via
 210 # $GITWEB_CONFIG.
 211 our %avatar_size = (
 212         'default' => 16,
 213         'double'  => 32
 214 );
 215
 216 # You define site-wide feature defaults here; override them with
 217 # $GITWEB_CONFIG as necessary.
 218 our %feature = (
 219         # feature => {
 220         #       'sub' => feature-sub (subroutine),
 221         #       'override' => allow-override (boolean),
 222         #       'default' => [ default options...] (array reference)}
 223         #
 224         # if feature is overridable (it means that allow-override has true value),
 225         # then feature-sub will be called with default options as parameters;
 226         # return value of feature-sub indicates if to enable specified feature
 227         #
 228         # if there is no 'sub' key (no feature-sub), then feature cannot be
 229         # overriden
 230         #
 231         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 232         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 233         # is enabled
 234
 235         # Enable the 'blame' blob view, showing the last commit that modified
 236         # each line in the file. This can be very CPU-intensive.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'blame'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'blame'}{'override'} = 1;
 242         # and in project config gitweb.blame = 0|1;
 243         'blame' => {
 244                 'sub' => sub { feature_bool('blame', @_) },
 245                 'override' => 0,
 246                 'default' => [0]},
 247
 248         # Enable the 'snapshot' link, providing a compressed archive of any
 249         # tree. This can potentially generate high traffic if you have large
 250         # project.
 251
 252         # Value is a list of formats defined in %known_snapshot_formats that
 253         # you wish to offer.
 254         # To disable system wide have in $GITWEB_CONFIG
 255         # $feature{'snapshot'}{'default'} = [];
 256         # To have project specific config enable override in $GITWEB_CONFIG
 257         # $feature{'snapshot'}{'override'} = 1;
 258         # and in project config, a comma-separated list of formats or "none"
 259         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 260         'snapshot' => {
 261                 'sub' => \&feature_snapshot,
 262                 'override' => 0,
 263                 'default' => ['tgz']},
 264
 265         # Enable text search, which will list the commits which match author,
 266         # committer or commit text to a given string.  Enabled by default.
 267         # Project specific override is not supported.
 268         'search' => {
 269                 'override' => 0,
 270                 'default' => [1]},
 271
 272         # Enable grep search, which will list the files in currently selected
 273         # tree containing the given string. Enabled by default. This can be
 274         # potentially CPU-intensive, of course.
 275
 276         # To enable system wide have in $GITWEB_CONFIG
 277         # $feature{'grep'}{'default'} = [1];
 278         # To have project specific config enable override in $GITWEB_CONFIG
 279         # $feature{'grep'}{'override'} = 1;
 280         # and in project config gitweb.grep = 0|1;
 281         'grep' => {
 282                 'sub' => sub { feature_bool('grep', @_) },
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable the pickaxe search, which will list the commits that modified
 287         # a given string in a file. This can be practical and quite faster
 288         # alternative to 'blame', but still potentially CPU-intensive.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pickaxe'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'pickaxe'}{'override'} = 1;
 294         # and in project config gitweb.pickaxe = 0|1;
 295         'pickaxe' => {
 296                 'sub' => sub { feature_bool('pickaxe', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable showing size of blobs in a 'tree' view, in a separate
 301         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 302
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'show-sizes'}{'default'} = [0];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'show-sizes'}{'override'} = 1;
 307         # and in project config gitweb.showsizes = 0|1;
 308         'show-sizes' => {
 309                 'sub' => sub { feature_bool('showsizes', @_) },
 310                 'override' => 0,
 311                 'default' => [1]},
 312
 313         # Make gitweb use an alternative format of the URLs which can be
 314         # more readable and natural-looking: project name is embedded
 315         # directly in the path and the query string contains other
 316         # auxiliary information. All gitweb installations recognize
 317         # URL in either format; this configures in which formats gitweb
 318         # generates links.
 319
 320         # To enable system wide have in $GITWEB_CONFIG
 321         # $feature{'pathinfo'}{'default'} = [1];
 322         # Project specific override is not supported.
 323
 324         # Note that you will need to change the default location of CSS,
 325         # favicon, logo and possibly other files to an absolute URL. Also,
 326         # if gitweb.cgi serves as your indexfile, you will need to force
 327         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 328         'pathinfo' => {
 329                 'override' => 0,
 330                 'default' => [0]},
 331
 332         # Make gitweb consider projects in project root subdirectories
 333         # to be forks of existing projects. Given project $projname.git,
 334         # projects matching $projname/*.git will not be shown in the main
 335         # projects list, instead a '+' mark will be added to $projname
 336         # there and a 'forks' view will be enabled for the project, listing
 337         # all the forks. If project list is taken from a file, forks have
 338         # to be listed after the main project.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'forks'}{'default'} = [1];
 342         # Project specific override is not supported.
 343         'forks' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Insert custom links to the action bar of all project pages.
 348         # This enables you mainly to link to third-party scripts integrating
 349         # into gitweb; e.g. git-browser for graphical history representation
 350         # or custom web-based repository administration interface.
 351
 352         # The 'default' value consists of a list of triplets in the form
 353         # (label, link, position) where position is the label after which
 354         # to insert the link and link is a format string where %n expands
 355         # to the project name, %f to the project path within the filesystem,
 356         # %h to the current hash (h gitweb parameter) and %b to the current
 357         # hash base (hb gitweb parameter); %% expands to %.
 358
 359         # To enable system wide have in $GITWEB_CONFIG e.g.
 360         # $feature{'actions'}{'default'} = [('graphiclog',
 361         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 362         # Project specific override is not supported.
 363         'actions' => {
 364                 'override' => 0,
 365                 'default' => []},
 366
 367         # Allow gitweb scan project content tags described in ctags/
 368         # of project repository, and display the popular Web 2.0-ish
 369         # "tag cloud" near the project list. Note that this is something
 370         # COMPLETELY different from the normal Git tags.
 371
 372         # gitweb by itself can show existing tags, but it does not handle
 373         # tagging itself; you need an external application for that.
 374         # For an example script, check Girocco's cgi/tagproj.cgi.
 375         # You may want to install the HTML::TagCloud Perl module to get
 376         # a pretty tag cloud instead of just a list of tags.
 377
 378         # To enable system wide have in $GITWEB_CONFIG
 379         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 380         # Project specific override is not supported.
 381         'ctags' => {
 382                 'override' => 0,
 383                 'default' => [0]},
 384
 385         # The maximum number of patches in a patchset generated in patch
 386         # view. Set this to 0 or undef to disable patch view, or to a
 387         # negative number to remove any limit.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'patches'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'patches'}{'override'} = 1;
 393         # and in project config gitweb.patches = 0|n;
 394         # where n is the maximum number of patches allowed in a patchset.
 395         'patches' => {
 396                 'sub' => \&feature_patches,
 397                 'override' => 0,
 398                 'default' => [16]},
 399
 400         # Avatar support. When this feature is enabled, views such as
 401         # shortlog or commit will display an avatar associated with
 402         # the email of the committer(s) and/or author(s).
 403
 404         # Currently available providers are gravatar and picon.
 405         # If an unknown provider is specified, the feature is disabled.
 406
 407         # Gravatar depends on Digest::MD5.
 408         # Picon currently relies on the indiana.edu database.
 409
 410         # To enable system wide have in $GITWEB_CONFIG
 411         # $feature{'avatar'}{'default'} = ['<provider>'];
 412         # where <provider> is either gravatar or picon.
 413         # To have project specific config enable override in $GITWEB_CONFIG
 414         # $feature{'avatar'}{'override'} = 1;
 415         # and in project config gitweb.avatar = <provider>;
 416         'avatar' => {
 417                 'sub' => \&feature_avatar,
 418                 'override' => 0,
 419                 'default' => ['']},
 420 );
 421
 422 sub gitweb_get_feature {
 423         my ($name) = @_;
 424         return unless exists $feature{$name};
 425         my ($sub, $override, @defaults) = (
 426                 $feature{$name}{'sub'},
 427                 $feature{$name}{'override'},
 428                 @{$feature{$name}{'default'}});
 429         if (!$override) { return @defaults; }
 430         if (!defined $sub) {
 431                 warn "feature $name is not overridable";
 432                 return @defaults;
 433         }
 434         return $sub->(@defaults);
 435 }
 436
 437 # A wrapper to check if a given feature is enabled.
 438 # With this, you can say
 439 #
 440 #   my $bool_feat = gitweb_check_feature('bool_feat');
 441 #   gitweb_check_feature('bool_feat') or somecode;
 442 #
 443 # instead of
 444 #
 445 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 446 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 447 #
 448 sub gitweb_check_feature {
 449         return (gitweb_get_feature(@_))[0];
 450 }
 451
 452
 453 sub feature_bool {
 454         my $key = shift;
 455         my ($val) = git_get_project_config($key, '--bool');
 456
 457         if (!defined $val) {
 458                 return ($_[0]);
 459         } elsif ($val eq 'true') {
 460                 return (1);
 461         } elsif ($val eq 'false') {
 462                 return (0);
 463         }
 464 }
 465
 466 sub feature_snapshot {
 467         my (@fmts) = @_;
 468
 469         my ($val) = git_get_project_config('snapshot');
 470
 471         if ($val) {
 472                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 473         }
 474
 475         return @fmts;
 476 }
 477
 478 sub feature_patches {
 479         my @val = (git_get_project_config('patches', '--int'));
 480
 481         if (@val) {
 482                 return @val;
 483         }
 484
 485         return ($_[0]);
 486 }
 487
 488 sub feature_avatar {
 489         my @val = (git_get_project_config('avatar'));
 490
 491         return @val ? @val : @_;
 492 }
 493
 494 # checking HEAD file with -e is fragile if the repository was
 495 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 496 # and then pruned.
 497 sub check_head_link {
 498         my ($dir) = @_;
 499         my $headfile = "$dir/HEAD";
 500         return ((-e $headfile) ||
 501                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 502 }
 503
 504 sub check_export_ok {
 505         my ($dir) = @_;
 506         return (check_head_link($dir) &&
 507                 (!$export_ok || -e "$dir/$export_ok") &&
 508                 (!$export_auth_hook || $export_auth_hook->($dir)));
 509 }
 510
 511 # process alternate names for backward compatibility
 512 # filter out unsupported (unknown) snapshot formats
 513 sub filter_snapshot_fmts {
 514         my @fmts = @_;
 515
 516         @fmts = map {
 517                 exists $known_snapshot_format_aliases{$_} ?
 518                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 519         @fmts = grep {
 520                 exists $known_snapshot_formats{$_} &&
 521                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 522 }
 523
 524 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 525 if (-e $GITWEB_CONFIG) {
 526         do $GITWEB_CONFIG;
 527 } else {
 528         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 529         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 530 }
 531
 532 # version of the core git binary
 533 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 534
 535 $projects_list ||= $projectroot;
 536
 537 # ======================================================================
 538 # input validation and dispatch
 539
 540 # input parameters can be collected from a variety of sources (presently, CGI
 541 # and PATH_INFO), so we define an %input_params hash that collects them all
 542 # together during validation: this allows subsequent uses (e.g. href()) to be
 543 # agnostic of the parameter origin
 544
 545 our %input_params = ();
 546
 547 # input parameters are stored with the long parameter name as key. This will
 548 # also be used in the href subroutine to convert parameters to their CGI
 549 # equivalent, and since the href() usage is the most frequent one, we store
 550 # the name -> CGI key mapping here, instead of the reverse.
 551 #
 552 # XXX: Warning: If you touch this, check the search form for updating,
 553 # too.
 554
 555 our @cgi_param_mapping = (
 556         project => "p",
 557         action => "a",
 558         file_name => "f",
 559         file_parent => "fp",
 560         hash => "h",
 561         hash_parent => "hp",
 562         hash_base => "hb",
 563         hash_parent_base => "hpb",
 564         page => "pg",
 565         order => "o",
 566         searchtext => "s",
 567         searchtype => "st",
 568         snapshot_format => "sf",
 569         extra_options => "opt",
 570         search_use_regexp => "sr",
 571 );
 572 our %cgi_param_mapping = @cgi_param_mapping;
 573
 574 # we will also need to know the possible actions, for validation
 575 our %actions = (
 576         "blame" => \&git_blame,
 577         "blobdiff" => \&git_blobdiff,
 578         "blobdiff_plain" => \&git_blobdiff_plain,
 579         "blob" => \&git_blob,
 580         "blob_plain" => \&git_blob_plain,
 581         "commitdiff" => \&git_commitdiff,
 582         "commitdiff_plain" => \&git_commitdiff_plain,
 583         "commit" => \&git_commit,
 584         "forks" => \&git_forks,
 585         "heads" => \&git_heads,
 586         "history" => \&git_history,
 587         "log" => \&git_log,
 588         "patch" => \&git_patch,
 589         "patches" => \&git_patches,
 590         "rss" => \&git_rss,
 591         "atom" => \&git_atom,
 592         "search" => \&git_search,
 593         "search_help" => \&git_search_help,
 594         "shortlog" => \&git_shortlog,
 595         "summary" => \&git_summary,
 596         "tag" => \&git_tag,
 597         "tags" => \&git_tags,
 598         "tree" => \&git_tree,
 599         "snapshot" => \&git_snapshot,
 600         "object" => \&git_object,
 601         # those below don't need $project
 602         "opml" => \&git_opml,
 603         "project_list" => \&git_project_list,
 604         "project_index" => \&git_project_index,
 605 );
 606
 607 # finally, we have the hash of allowed extra_options for the commands that
 608 # allow them
 609 our %allowed_options = (
 610         "--no-merges" => [ qw(rss atom log shortlog history) ],
 611 );
 612
 613 # fill %input_params with the CGI parameters. All values except for 'opt'
 614 # should be single values, but opt can be an array. We should probably
 615 # build an array of parameters that can be multi-valued, but since for the time
 616 # being it's only this one, we just single it out
 617 while (my ($name, $symbol) = each %cgi_param_mapping) {
 618         if ($symbol eq 'opt') {
 619                 $input_params{$name} = [ $cgi->param($symbol) ];
 620         } else {
 621                 $input_params{$name} = $cgi->param($symbol);
 622         }
 623 }
 624
 625 # now read PATH_INFO and update the parameter list for missing parameters
 626 sub evaluate_path_info {
 627         return if defined $input_params{'project'};
 628         return if !$path_info;
 629         $path_info =~ s,^/+,,;
 630         return if !$path_info;
 631
 632         # find which part of PATH_INFO is project
 633         my $project = $path_info;
 634         $project =~ s,/+$,,;
 635         while ($project && !check_head_link("$projectroot/$project")) {
 636                 $project =~ s,/*[^/]*$,,;
 637         }
 638         return unless $project;
 639         $input_params{'project'} = $project;
 640
 641         # do not change any parameters if an action is given using the query string
 642         return if $input_params{'action'};
 643         $path_info =~ s,^\Q$project\E/*,,;
 644
 645         # next, check if we have an action
 646         my $action = $path_info;
 647         $action =~ s,/.*$,,;
 648         if (exists $actions{$action}) {
 649                 $path_info =~ s,^$action/*,,;
 650                 $input_params{'action'} = $action;
 651         }
 652
 653         # list of actions that want hash_base instead of hash, but can have no
 654         # pathname (f) parameter
 655         my @wants_base = (
 656                 'tree',
 657                 'history',
 658         );
 659
 660         # we want to catch
 661         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 662         my ($parentrefname, $parentpathname, $refname, $pathname) =
 663                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 664
 665         # first, analyze the 'current' part
 666         if (defined $pathname) {
 667                 # we got "branch:filename" or "branch:dir/"
 668                 # we could use git_get_type(branch:pathname), but:
 669                 # - it needs $git_dir
 670                 # - it does a git() call
 671                 # - the convention of terminating directories with a slash
 672                 #   makes it superfluous
 673                 # - embedding the action in the PATH_INFO would make it even
 674                 #   more superfluous
 675                 $pathname =~ s,^/+,,;
 676                 if (!$pathname || substr($pathname, -1) eq "/") {
 677                         $input_params{'action'} ||= "tree";
 678                         $pathname =~ s,/$,,;
 679                 } else {
 680                         # the default action depends on whether we had parent info
 681                         # or not
 682                         if ($parentrefname) {
 683                                 $input_params{'action'} ||= "blobdiff_plain";
 684                         } else {
 685                                 $input_params{'action'} ||= "blob_plain";
 686                         }
 687                 }
 688                 $input_params{'hash_base'} ||= $refname;
 689                 $input_params{'file_name'} ||= $pathname;
 690         } elsif (defined $refname) {
 691                 # we got "branch". In this case we have to choose if we have to
 692                 # set hash or hash_base.
 693                 #
 694                 # Most of the actions without a pathname only want hash to be
 695                 # set, except for the ones specified in @wants_base that want
 696                 # hash_base instead. It should also be noted that hand-crafted
 697                 # links having 'history' as an action and no pathname or hash
 698                 # set will fail, but that happens regardless of PATH_INFO.
 699                 $input_params{'action'} ||= "shortlog";
 700                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 701                         $input_params{'hash_base'} ||= $refname;
 702                 } else {
 703                         $input_params{'hash'} ||= $refname;
 704                 }
 705         }
 706
 707         # next, handle the 'parent' part, if present
 708         if (defined $parentrefname) {
 709                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 710                 # someproject/blobdiff/oldrev..newrev:/filename
 711                 if ($parentpathname) {
 712                         $parentpathname =~ s,^/+,,;
 713                         $parentpathname =~ s,/$,,;
 714                         $input_params{'file_parent'} ||= $parentpathname;
 715                 } else {
 716                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 717                 }
 718                 # we assume that hash_parent_base is wanted if a path was specified,
 719                 # or if the action wants hash_base instead of hash
 720                 if (defined $input_params{'file_parent'} ||
 721                         grep { $_ eq $input_params{'action'} } @wants_base) {
 722                         $input_params{'hash_parent_base'} ||= $parentrefname;
 723                 } else {
 724                         $input_params{'hash_parent'} ||= $parentrefname;
 725                 }
 726         }
 727
 728         # for the snapshot action, we allow URLs in the form
 729         # $project/snapshot/$hash.ext
 730         # where .ext determines the snapshot and gets removed from the
 731         # passed $refname to provide the $hash.
 732         #
 733         # To be able to tell that $refname includes the format extension, we
 734         # require the following two conditions to be satisfied:
 735         # - the hash input parameter MUST have been set from the $refname part
 736         #   of the URL (i.e. they must be equal)
 737         # - the snapshot format MUST NOT have been defined already (e.g. from
 738         #   CGI parameter sf)
 739         # It's also useless to try any matching unless $refname has a dot,
 740         # so we check for that too
 741         if (defined $input_params{'action'} &&
 742                 $input_params{'action'} eq 'snapshot' &&
 743                 defined $refname && index($refname, '.') != -1 &&
 744                 $refname eq $input_params{'hash'} &&
 745                 !defined $input_params{'snapshot_format'}) {
 746                 # We loop over the known snapshot formats, checking for
 747                 # extensions. Allowed extensions are both the defined suffix
 748                 # (which includes the initial dot already) and the snapshot
 749                 # format key itself, with a prepended dot
 750                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 751                         my $hash = $refname;
 752                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 753                                 next;
 754                         }
 755                         my $sfx = $1;
 756                         # a valid suffix was found, so set the snapshot format
 757                         # and reset the hash parameter
 758                         $input_params{'snapshot_format'} = $fmt;
 759                         $input_params{'hash'} = $hash;
 760                         # we also set the format suffix to the one requested
 761                         # in the URL: this way a request for e.g. .tgz returns
 762                         # a .tgz instead of a .tar.gz
 763                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 764                         last;
 765                 }
 766         }
 767 }
 768 evaluate_path_info();
 769
 770 our $action = $input_params{'action'};
 771 if (defined $action) {
 772         if (!validate_action($action)) {
 773                 die_error(400, "Invalid action parameter");
 774         }
 775 }
 776
 777 # parameters which are pathnames
 778 our $project = $input_params{'project'};
 779 if (defined $project) {
 780         if (!validate_project($project)) {
 781                 undef $project;
 782                 die_error(404, "No such project");
 783         }
 784 }
 785
 786 our $file_name = $input_params{'file_name'};
 787 if (defined $file_name) {
 788         if (!validate_pathname($file_name)) {
 789                 die_error(400, "Invalid file parameter");
 790         }
 791 }
 792
 793 our $file_parent = $input_params{'file_parent'};
 794 if (defined $file_parent) {
 795         if (!validate_pathname($file_parent)) {
 796                 die_error(400, "Invalid file parent parameter");
 797         }
 798 }
 799
 800 # parameters which are refnames
 801 our $hash = $input_params{'hash'};
 802 if (defined $hash) {
 803         if (!validate_refname($hash)) {
 804                 die_error(400, "Invalid hash parameter");
 805         }
 806 }
 807
 808 our $hash_parent = $input_params{'hash_parent'};
 809 if (defined $hash_parent) {
 810         if (!validate_refname($hash_parent)) {
 811                 die_error(400, "Invalid hash parent parameter");
 812         }
 813 }
 814
 815 our $hash_base = $input_params{'hash_base'};
 816 if (defined $hash_base) {
 817         if (!validate_refname($hash_base)) {
 818                 die_error(400, "Invalid hash base parameter");
 819         }
 820 }
 821
 822 our @extra_options = @{$input_params{'extra_options'}};
 823 # @extra_options is always defined, since it can only be (currently) set from
 824 # CGI, and $cgi->param() returns the empty array in array context if the param
 825 # is not set
 826 foreach my $opt (@extra_options) {
 827         if (not exists $allowed_options{$opt}) {
 828                 die_error(400, "Invalid option parameter");
 829         }
 830         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 831                 die_error(400, "Invalid option parameter for this action");
 832         }
 833 }
 834
 835 our $hash_parent_base = $input_params{'hash_parent_base'};
 836 if (defined $hash_parent_base) {
 837         if (!validate_refname($hash_parent_base)) {
 838                 die_error(400, "Invalid hash parent base parameter");
 839         }
 840 }
 841
 842 # other parameters
 843 our $page = $input_params{'page'};
 844 if (defined $page) {
 845         if ($page =~ m/[^0-9]/) {
 846                 die_error(400, "Invalid page parameter");
 847         }
 848 }
 849
 850 our $searchtype = $input_params{'searchtype'};
 851 if (defined $searchtype) {
 852         if ($searchtype =~ m/[^a-z]/) {
 853                 die_error(400, "Invalid searchtype parameter");
 854         }
 855 }
 856
 857 our $search_use_regexp = $input_params{'search_use_regexp'};
 858
 859 our $searchtext = $input_params{'searchtext'};
 860 our $search_regexp;
 861 if (defined $searchtext) {
 862         if (length($searchtext) < 2) {
 863                 die_error(403, "At least two characters are required for search parameter");
 864         }
 865         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 866 }
 867
 868 # path to the current git repository
 869 our $git_dir;
 870 $git_dir = "$projectroot/$project" if $project;
 871
 872 # list of supported snapshot formats
 873 our @snapshot_fmts = gitweb_get_feature('snapshot');
 874 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 875
 876 # check that the avatar feature is set to a known provider name,
 877 # and for each provider check if the dependencies are satisfied.
 878 # if the provider name is invalid or the dependencies are not met,
 879 # reset $git_avatar to the empty string.
 880 our ($git_avatar) = gitweb_get_feature('avatar');
 881 if ($git_avatar eq 'gravatar') {
 882         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 883 } elsif ($git_avatar eq 'picon') {
 884         # no dependencies
 885 } else {
 886         $git_avatar = '';
 887 }
 888
 889 # dispatch
 890 if (!defined $action) {
 891         if (defined $hash) {
 892                 $action = git_get_type($hash);
 893         } elsif (defined $hash_base && defined $file_name) {
 894                 $action = git_get_type("$hash_base:$file_name");
 895         } elsif (defined $project) {
 896                 $action = 'summary';
 897         } else {
 898                 $action = 'project_list';
 899         }
 900 }
 901 if (!defined($actions{$action})) {
 902         die_error(400, "Unknown action");
 903 }
 904 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 905     !$project) {
 906         die_error(400, "Project needed");
 907 }
 908 $actions{$action}->();
 909 exit;
 910
 911 ## ======================================================================
 912 ## action links
 913
 914 sub href {
 915         my %params = @_;
 916         # default is to use -absolute url() i.e. $my_uri
 917         my $href = $params{-full} ? $my_url : $my_uri;
 918
 919         $params{'project'} = $project unless exists $params{'project'};
 920
 921         if ($params{-replay}) {
 922                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 923                         if (!exists $params{$name}) {
 924                                 $params{$name} = $input_params{$name};
 925                         }
 926                 }
 927         }
 928
 929         my $use_pathinfo = gitweb_check_feature('pathinfo');
 930         if ($use_pathinfo and defined $params{'project'}) {
 931                 # try to put as many parameters as possible in PATH_INFO:
 932                 #   - project name
 933                 #   - action
 934                 #   - hash_parent or hash_parent_base:/file_parent
 935                 #   - hash or hash_base:/filename
 936                 #   - the snapshot_format as an appropriate suffix
 937
 938                 # When the script is the root DirectoryIndex for the domain,
 939                 # $href here would be something like http://gitweb.example.com/
 940                 # Thus, we strip any trailing / from $href, to spare us double
 941                 # slashes in the final URL
 942                 $href =~ s,/$,,;
 943
 944                 # Then add the project name, if present
 945                 $href .= "/".esc_url($params{'project'});
 946                 delete $params{'project'};
 947
 948                 # since we destructively absorb parameters, we keep this
 949                 # boolean that remembers if we're handling a snapshot
 950                 my $is_snapshot = $params{'action'} eq 'snapshot';
 951
 952                 # Summary just uses the project path URL, any other action is
 953                 # added to the URL
 954                 if (defined $params{'action'}) {
 955                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 956                         delete $params{'action'};
 957                 }
 958
 959                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 960                 # stripping nonexistent or useless pieces
 961                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 962                         || $params{'hash_parent'} || $params{'hash'});
 963                 if (defined $params{'hash_base'}) {
 964                         if (defined $params{'hash_parent_base'}) {
 965                                 $href .= esc_url($params{'hash_parent_base'});
 966                                 # skip the file_parent if it's the same as the file_name
 967                                 if (defined $params{'file_parent'}) {
 968                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 969                                                 delete $params{'file_parent'};
 970                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 971                                                 $href .= ":/".esc_url($params{'file_parent'});
 972                                                 delete $params{'file_parent'};
 973                                         }
 974                                 }
 975                                 $href .= "..";
 976                                 delete $params{'hash_parent'};
 977                                 delete $params{'hash_parent_base'};
 978                         } elsif (defined $params{'hash_parent'}) {
 979                                 $href .= esc_url($params{'hash_parent'}). "..";
 980                                 delete $params{'hash_parent'};
 981                         }
 982
 983                         $href .= esc_url($params{'hash_base'});
 984                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 985                                 $href .= ":/".esc_url($params{'file_name'});
 986                                 delete $params{'file_name'};
 987                         }
 988                         delete $params{'hash'};
 989                         delete $params{'hash_base'};
 990                 } elsif (defined $params{'hash'}) {
 991                         $href .= esc_url($params{'hash'});
 992                         delete $params{'hash'};
 993                 }
 994
 995                 # If the action was a snapshot, we can absorb the
 996                 # snapshot_format parameter too
 997                 if ($is_snapshot) {
 998                         my $fmt = $params{'snapshot_format'};
 999                         # snapshot_format should always be defined when href()
1000                         # is called, but just in case some code forgets, we
1001                         # fall back to the default
1002                         $fmt ||= $snapshot_fmts[0];
1003                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1004                         delete $params{'snapshot_format'};
1005                 }
1006         }
1007
1008         # now encode the parameters explicitly
1009         my @result = ();
1010         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1011                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1012                 if (defined $params{$name}) {
1013                         if (ref($params{$name}) eq "ARRAY") {
1014                                 foreach my $par (@{$params{$name}}) {
1015                                         push @result, $symbol . "=" . esc_param($par);
1016                                 }
1017                         } else {
1018                                 push @result, $symbol . "=" . esc_param($params{$name});
1019                         }
1020                 }
1021         }
1022         $href .= "?" . join(';', @result) if scalar @result;
1023
1024         return $href;
1025 }
1026
1027
1028 ## ======================================================================
1029 ## validation, quoting/unquoting and escaping
1030
1031 sub validate_action {
1032         my $input = shift || return undef;
1033         return undef unless exists $actions{$input};
1034         return $input;
1035 }
1036
1037 sub validate_project {
1038         my $input = shift || return undef;
1039         if (!validate_pathname($input) ||
1040                 !(-d "$projectroot/$input") ||
1041                 !check_export_ok("$projectroot/$input") ||
1042                 ($strict_export && !project_in_list($input))) {
1043                 return undef;
1044         } else {
1045                 return $input;
1046         }
1047 }
1048
1049 sub validate_pathname {
1050         my $input = shift || return undef;
1051
1052         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1053         # at the beginning, at the end, and between slashes.
1054         # also this catches doubled slashes
1055         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1056                 return undef;
1057         }
1058         # no null characters
1059         if ($input =~ m!\0!) {
1060                 return undef;
1061         }
1062         return $input;
1063 }
1064
1065 sub validate_refname {
1066         my $input = shift || return undef;
1067
1068         # textual hashes are O.K.
1069         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1070                 return $input;
1071         }
1072         # it must be correct pathname
1073         $input = validate_pathname($input)
1074                 or return undef;
1075         # restrictions on ref name according to git-check-ref-format
1076         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1077                 return undef;
1078         }
1079         return $input;
1080 }
1081
1082 # decode sequences of octets in utf8 into Perl's internal form,
1083 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1084 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1085 sub to_utf8 {
1086         my $str = shift;
1087         if (utf8::valid($str)) {
1088                 utf8::decode($str);
1089                 return $str;
1090         } else {
1091                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1092         }
1093 }
1094
1095 # quote unsafe chars, but keep the slash, even when it's not
1096 # correct, but quoted slashes look too horrible in bookmarks
1097 sub esc_param {
1098         my $str = shift;
1099         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1100         $str =~ s/ /\+/g;
1101         return $str;
1102 }
1103
1104 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1105 sub esc_url {
1106         my $str = shift;
1107         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1108         $str =~ s/\+/%2B/g;
1109         $str =~ s/ /\+/g;
1110         return $str;
1111 }
1112
1113 # replace invalid utf8 character with SUBSTITUTION sequence
1114 sub esc_html {
1115         my $str = shift;
1116         my %opts = @_;
1117
1118         $str = to_utf8($str);
1119         $str = $cgi->escapeHTML($str);
1120         if ($opts{'-nbsp'}) {
1121                 $str =~ s/ /&nbsp;/g;
1122         }
1123         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1124         return $str;
1125 }
1126
1127 # quote control characters and escape filename to HTML
1128 sub esc_path {
1129         my $str = shift;
1130         my %opts = @_;
1131
1132         $str = to_utf8($str);
1133         $str = $cgi->escapeHTML($str);
1134         if ($opts{'-nbsp'}) {
1135                 $str =~ s/ /&nbsp;/g;
1136         }
1137         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1138         return $str;
1139 }
1140
1141 # Make control characters "printable", using character escape codes (CEC)
1142 sub quot_cec {
1143         my $cntrl = shift;
1144         my %opts = @_;
1145         my %es = ( # character escape codes, aka escape sequences
1146                 "\t" => '\t',   # tab            (HT)
1147                 "\n" => '\n',   # line feed      (LF)
1148                 "\r" => '\r',   # carrige return (CR)
1149                 "\f" => '\f',   # form feed      (FF)
1150                 "\b" => '\b',   # backspace      (BS)
1151                 "\a" => '\a',   # alarm (bell)   (BEL)
1152                 "\e" => '\e',   # escape         (ESC)
1153                 "\013" => '\v', # vertical tab   (VT)
1154                 "\000" => '\0', # nul character  (NUL)
1155         );
1156         my $chr = ( (exists $es{$cntrl})
1157                     ? $es{$cntrl}
1158                     : sprintf('\%2x', ord($cntrl)) );
1159         if ($opts{-nohtml}) {
1160                 return $chr;
1161         } else {
1162                 return "<span class=\"cntrl\">$chr</span>";
1163         }
1164 }
1165
1166 # Alternatively use unicode control pictures codepoints,
1167 # Unicode "printable representation" (PR)
1168 sub quot_upr {
1169         my $cntrl = shift;
1170         my %opts = @_;
1171
1172         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1173         if ($opts{-nohtml}) {
1174                 return $chr;
1175         } else {
1176                 return "<span class=\"cntrl\">$chr</span>";
1177         }
1178 }
1179
1180 # git may return quoted and escaped filenames
1181 sub unquote {
1182         my $str = shift;
1183
1184         sub unq {
1185                 my $seq = shift;
1186                 my %es = ( # character escape codes, aka escape sequences
1187                         't' => "\t",   # tab            (HT, TAB)
1188                         'n' => "\n",   # newline        (NL)
1189                         'r' => "\r",   # return         (CR)
1190                         'f' => "\f",   # form feed      (FF)
1191                         'b' => "\b",   # backspace      (BS)
1192                         'a' => "\a",   # alarm (bell)   (BEL)
1193                         'e' => "\e",   # escape         (ESC)
1194                         'v' => "\013", # vertical tab   (VT)
1195                 );
1196
1197                 if ($seq =~ m/^[0-7]{1,3}$/) {
1198                         # octal char sequence
1199                         return chr(oct($seq));
1200                 } elsif (exists $es{$seq}) {
1201                         # C escape sequence, aka character escape code
1202                         return $es{$seq};
1203                 }
1204                 # quoted ordinary character
1205                 return $seq;
1206         }
1207
1208         if ($str =~ m/^"(.*)"$/) {
1209                 # needs unquoting
1210                 $str = $1;
1211                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1212         }
1213         return $str;
1214 }
1215
1216 # escape tabs (convert tabs to spaces)
1217 sub untabify {
1218         my $line = shift;
1219
1220         while ((my $pos = index($line, "\t")) != -1) {
1221                 if (my $count = (8 - ($pos % 8))) {
1222                         my $spaces = ' ' x $count;
1223                         $line =~ s/\t/$spaces/;
1224                 }
1225         }
1226
1227         return $line;
1228 }
1229
1230 sub project_in_list {
1231         my $project = shift;
1232         my @list = git_get_projects_list();
1233         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1234 }
1235
1236 ## ----------------------------------------------------------------------
1237 ## HTML aware string manipulation
1238
1239 # Try to chop given string on a word boundary between position
1240 # $len and $len+$add_len. If there is no word boundary there,
1241 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1242 # (marking chopped part) would be longer than given string.
1243 sub chop_str {
1244         my $str = shift;
1245         my $len = shift;
1246         my $add_len = shift || 10;
1247         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1248
1249         # Make sure perl knows it is utf8 encoded so we don't
1250         # cut in the middle of a utf8 multibyte char.
1251         $str = to_utf8($str);
1252
1253         # allow only $len chars, but don't cut a word if it would fit in $add_len
1254         # if it doesn't fit, cut it if it's still longer than the dots we would add
1255         # remove chopped character entities entirely
1256
1257         # when chopping in the middle, distribute $len into left and right part
1258         # return early if chopping wouldn't make string shorter
1259         if ($where eq 'center') {
1260                 return $str if ($len + 5 >= length($str)); # filler is length 5
1261                 $len = int($len/2);
1262         } else {
1263                 return $str if ($len + 4 >= length($str)); # filler is length 4
1264         }
1265
1266         # regexps: ending and beginning with word part up to $add_len
1267         my $endre = qr/.{$len}\w{0,$add_len}/;
1268         my $begre = qr/\w{0,$add_len}.{$len}/;
1269
1270         if ($where eq 'left') {
1271                 $str =~ m/^(.*?)($begre)$/;
1272                 my ($lead, $body) = ($1, $2);
1273                 if (length($lead) > 4) {
1274                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1275                         $lead = " ...";
1276                 }
1277                 return "$lead$body";
1278
1279         } elsif ($where eq 'center') {
1280                 $str =~ m/^($endre)(.*)$/;
1281                 my ($left, $str)  = ($1, $2);
1282                 $str =~ m/^(.*?)($begre)$/;
1283                 my ($mid, $right) = ($1, $2);
1284                 if (length($mid) > 5) {
1285                         $left  =~ s/&[^;]*$//;
1286                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1287                         $mid = " ... ";
1288                 }
1289                 return "$left$mid$right";
1290
1291         } else {
1292                 $str =~ m/^($endre)(.*)$/;
1293                 my $body = $1;
1294                 my $tail = $2;
1295                 if (length($tail) > 4) {
1296                         $body =~ s/&[^;]*$//;
1297                         $tail = "... ";
1298                 }
1299                 return "$body$tail";
1300         }
1301 }
1302
1303 # takes the same arguments as chop_str, but also wraps a <span> around the
1304 # result with a title attribute if it does get chopped. Additionally, the
1305 # string is HTML-escaped.
1306 sub chop_and_escape_str {
1307         my ($str) = @_;
1308
1309         my $chopped = chop_str(@_);
1310         if ($chopped eq $str) {
1311                 return esc_html($chopped);
1312         } else {
1313                 $str =~ s/[[:cntrl:]]/?/g;
1314                 return $cgi->span({-title=>$str}, esc_html($chopped));
1315         }
1316 }
1317
1318 ## ----------------------------------------------------------------------
1319 ## functions returning short strings
1320
1321 # CSS class for given age value (in seconds)
1322 sub age_class {
1323         my $age = shift;
1324
1325         if (!defined $age) {
1326                 return "noage";
1327         } elsif ($age < 60*60*2) {
1328                 return "age0";
1329         } elsif ($age < 60*60*24*2) {
1330                 return "age1";
1331         } else {
1332                 return "age2";
1333         }
1334 }
1335
1336 # convert age in seconds to "nn units ago" string
1337 sub age_string {
1338         my $age = shift;
1339         my $age_str;
1340
1341         if ($age > 60*60*24*365*2) {
1342                 $age_str = (int $age/60/60/24/365);
1343                 $age_str .= " years ago";
1344         } elsif ($age > 60*60*24*(365/12)*2) {
1345                 $age_str = int $age/60/60/24/(365/12);
1346                 $age_str .= " months ago";
1347         } elsif ($age > 60*60*24*7*2) {
1348                 $age_str = int $age/60/60/24/7;
1349                 $age_str .= " weeks ago";
1350         } elsif ($age > 60*60*24*2) {
1351                 $age_str = int $age/60/60/24;
1352                 $age_str .= " days ago";
1353         } elsif ($age > 60*60*2) {
1354                 $age_str = int $age/60/60;
1355                 $age_str .= " hours ago";
1356         } elsif ($age > 60*2) {
1357                 $age_str = int $age/60;
1358                 $age_str .= " min ago";
1359         } elsif ($age > 2) {
1360                 $age_str = int $age;
1361                 $age_str .= " sec ago";
1362         } else {
1363                 $age_str .= " right now";
1364         }
1365         return $age_str;
1366 }
1367
1368 use constant {
1369         S_IFINVALID => 0030000,
1370         S_IFGITLINK => 0160000,
1371 };
1372
1373 # submodule/subproject, a commit object reference
1374 sub S_ISGITLINK {
1375         my $mode = shift;
1376
1377         return (($mode & S_IFMT) == S_IFGITLINK)
1378 }
1379
1380 # convert file mode in octal to symbolic file mode string
1381 sub mode_str {
1382         my $mode = oct shift;
1383
1384         if (S_ISGITLINK($mode)) {
1385                 return 'm---------';
1386         } elsif (S_ISDIR($mode & S_IFMT)) {
1387                 return 'drwxr-xr-x';
1388         } elsif (S_ISLNK($mode)) {
1389                 return 'lrwxrwxrwx';
1390         } elsif (S_ISREG($mode)) {
1391                 # git cares only about the executable bit
1392                 if ($mode & S_IXUSR) {
1393                         return '-rwxr-xr-x';
1394                 } else {
1395                         return '-rw-r--r--';
1396                 };
1397         } else {
1398                 return '----------';
1399         }
1400 }
1401
1402 # convert file mode in octal to file type string
1403 sub file_type {
1404         my $mode = shift;
1405
1406         if ($mode !~ m/^[0-7]+$/) {
1407                 return $mode;
1408         } else {
1409                 $mode = oct $mode;
1410         }
1411
1412         if (S_ISGITLINK($mode)) {
1413                 return "submodule";
1414         } elsif (S_ISDIR($mode & S_IFMT)) {
1415                 return "directory";
1416         } elsif (S_ISLNK($mode)) {
1417                 return "symlink";
1418         } elsif (S_ISREG($mode)) {
1419                 return "file";
1420         } else {
1421                 return "unknown";
1422         }
1423 }
1424
1425 # convert file mode in octal to file type description string
1426 sub file_type_long {
1427         my $mode = shift;
1428
1429         if ($mode !~ m/^[0-7]+$/) {
1430                 return $mode;
1431         } else {
1432                 $mode = oct $mode;
1433         }
1434
1435         if (S_ISGITLINK($mode)) {
1436                 return "submodule";
1437         } elsif (S_ISDIR($mode & S_IFMT)) {
1438                 return "directory";
1439         } elsif (S_ISLNK($mode)) {
1440                 return "symlink";
1441         } elsif (S_ISREG($mode)) {
1442                 if ($mode & S_IXUSR) {
1443                         return "executable";
1444                 } else {
1445                         return "file";
1446                 };
1447         } else {
1448                 return "unknown";
1449         }
1450 }
1451
1452
1453 ## ----------------------------------------------------------------------
1454 ## functions returning short HTML fragments, or transforming HTML fragments
1455 ## which don't belong to other sections
1456
1457 # format line of commit message.
1458 sub format_log_line_html {
1459         my $line = shift;
1460
1461         $line = esc_html($line, -nbsp=>1);
1462         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1463                 $cgi->a({-href => href(action=>"object", hash=>$1),
1464                                         -class => "text"}, $1);
1465         }eg;
1466
1467         return $line;
1468 }
1469
1470 # format marker of refs pointing to given object
1471
1472 # the destination action is chosen based on object type and current context:
1473 # - for annotated tags, we choose the tag view unless it's the current view
1474 #   already, in which case we go to shortlog view
1475 # - for other refs, we keep the current view if we're in history, shortlog or
1476 #   log view, and select shortlog otherwise
1477 sub format_ref_marker {
1478         my ($refs, $id) = @_;
1479         my $markers = '';
1480
1481         if (defined $refs->{$id}) {
1482                 foreach my $ref (@{$refs->{$id}}) {
1483                         # this code exploits the fact that non-lightweight tags are the
1484                         # only indirect objects, and that they are the only objects for which
1485                         # we want to use tag instead of shortlog as action
1486                         my ($type, $name) = qw();
1487                         my $indirect = ($ref =~ s/\^\{\}$//);
1488                         # e.g. tags/v2.6.11 or heads/next
1489                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1490                                 $type = $1;
1491                                 $name = $2;
1492                         } else {
1493                                 $type = "ref";
1494                                 $name = $ref;
1495                         }
1496
1497                         my $class = $type;
1498                         $class .= " indirect" if $indirect;
1499
1500                         my $dest_action = "shortlog";
1501
1502                         if ($indirect) {
1503                                 $dest_action = "tag" unless $action eq "tag";
1504                         } elsif ($action =~ /^(history|(short)?log)$/) {
1505                                 $dest_action = $action;
1506                         }
1507
1508                         my $dest = "";
1509                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1510                         $dest .= $ref;
1511
1512                         my $link = $cgi->a({
1513                                 -href => href(
1514                                         action=>$dest_action,
1515                                         hash=>$dest
1516                                 )}, $name);
1517
1518                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1519                                 $link . "</span>";
1520                 }
1521         }
1522
1523         if ($markers) {
1524                 return ' <span class="refs">'. $markers . '</span>';
1525         } else {
1526                 return "";
1527         }
1528 }
1529
1530 # format, perhaps shortened and with markers, title line
1531 sub format_subject_html {
1532         my ($long, $short, $href, $extra) = @_;
1533         $extra = '' unless defined($extra);
1534
1535         if (length($short) < length($long)) {
1536                 $long =~ s/[[:cntrl:]]/?/g;
1537                 return $cgi->a({-href => $href, -class => "list subject",
1538                                 -title => to_utf8($long)},
1539                        esc_html($short)) . $extra;
1540         } else {
1541                 return $cgi->a({-href => $href, -class => "list subject"},
1542                        esc_html($long)) . $extra;
1543         }
1544 }
1545
1546 # Rather than recomputing the url for an email multiple times, we cache it
1547 # after the first hit. This gives a visible benefit in views where the avatar
1548 # for the same email is used repeatedly (e.g. shortlog).
1549 # The cache is shared by all avatar engines (currently gravatar only), which
1550 # are free to use it as preferred. Since only one avatar engine is used for any
1551 # given page, there's no risk for cache conflicts.
1552 our %avatar_cache = ();
1553
1554 # Compute the picon url for a given email, by using the picon search service over at
1555 # http://www.cs.indiana.edu/picons/search.html
1556 sub picon_url {
1557         my $email = lc shift;
1558         if (!$avatar_cache{$email}) {
1559                 my ($user, $domain) = split('@', $email);
1560                 $avatar_cache{$email} =
1561                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1562                         "$domain/$user/" .
1563                         "users+domains+unknown/up/single";
1564         }
1565         return $avatar_cache{$email};
1566 }
1567
1568 # Compute the gravatar url for a given email, if it's not in the cache already.
1569 # Gravatar stores only the part of the URL before the size, since that's the
1570 # one computationally more expensive. This also allows reuse of the cache for
1571 # different sizes (for this particular engine).
1572 sub gravatar_url {
1573         my $email = lc shift;
1574         my $size = shift;
1575         $avatar_cache{$email} ||=
1576                 "http://www.gravatar.com/avatar/" .
1577                         Digest::MD5::md5_hex($email) . "?s=";
1578         return $avatar_cache{$email} . $size;
1579 }
1580
1581 # Insert an avatar for the given $email at the given $size if the feature
1582 # is enabled.
1583 sub git_get_avatar {
1584         my ($email, %opts) = @_;
1585         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1586         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1587         $opts{-size} ||= 'default';
1588         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1589         my $url = "";
1590         if ($git_avatar eq 'gravatar') {
1591                 $url = gravatar_url($email, $size);
1592         } elsif ($git_avatar eq 'picon') {
1593                 $url = picon_url($email);
1594         }
1595         # Other providers can be added by extending the if chain, defining $url
1596         # as needed. If no variant puts something in $url, we assume avatars
1597         # are completely disabled/unavailable.
1598         if ($url) {
1599                 return $pre_white .
1600                        "<img width=\"$size\" " .
1601                             "class=\"avatar\" " .
1602                             "src=\"$url\" " .
1603                             "alt=\"\" " .
1604                        "/>" . $post_white;
1605         } else {
1606                 return "";
1607         }
1608 }
1609
1610 sub format_search_author {
1611         my ($author, $searchtype, $displaytext) = @_;
1612         my $have_search = gitweb_check_feature('search');
1613
1614         if ($have_search) {
1615                 my $performed = "";
1616                 if ($searchtype eq 'author') {
1617                         $performed = "authored";
1618                 } elsif ($searchtype eq 'committer') {
1619                         $performed = "committed";
1620                 }
1621
1622                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1623                                 searchtext=>$author,
1624                                 searchtype=>$searchtype), class=>"list",
1625                                 title=>"Search for commits $performed by $author"},
1626                                 $displaytext);
1627
1628         } else {
1629                 return $displaytext;
1630         }
1631 }
1632
1633 # format the author name of the given commit with the given tag
1634 # the author name is chopped and escaped according to the other
1635 # optional parameters (see chop_str).
1636 sub format_author_html {
1637         my $tag = shift;
1638         my $co = shift;
1639         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1640         return "<$tag class=\"author\">" .
1641                format_search_author($co->{'author_name'}, "author",
1642                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1643                        $author) .
1644                "</$tag>";
1645 }
1646
1647 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1648 sub format_git_diff_header_line {
1649         my $line = shift;
1650         my $diffinfo = shift;
1651         my ($from, $to) = @_;
1652
1653         if ($diffinfo->{'nparents'}) {
1654                 # combined diff
1655                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1656                 if ($to->{'href'}) {
1657                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1658                                          esc_path($to->{'file'}));
1659                 } else { # file was deleted (no href)
1660                         $line .= esc_path($to->{'file'});
1661                 }
1662         } else {
1663                 # "ordinary" diff
1664                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1665                 if ($from->{'href'}) {
1666                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1667                                          'a/' . esc_path($from->{'file'}));
1668                 } else { # file was added (no href)
1669                         $line .= 'a/' . esc_path($from->{'file'});
1670                 }
1671                 $line .= ' ';
1672                 if ($to->{'href'}) {
1673                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1674                                          'b/' . esc_path($to->{'file'}));
1675                 } else { # file was deleted
1676                         $line .= 'b/' . esc_path($to->{'file'});
1677                 }
1678         }
1679
1680         return "<div class=\"diff header\">$line</div>\n";
1681 }
1682
1683 # format extended diff header line, before patch itself
1684 sub format_extended_diff_header_line {
1685         my $line = shift;
1686         my $diffinfo = shift;
1687         my ($from, $to) = @_;
1688
1689         # match <path>
1690         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1691                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1692                                        esc_path($from->{'file'}));
1693         }
1694         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1695                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1696                                  esc_path($to->{'file'}));
1697         }
1698         # match single <mode>
1699         if ($line =~ m/\s(\d{6})$/) {
1700                 $line .= '<span class="info"> (' .
1701                          file_type_long($1) .
1702                          ')</span>';
1703         }
1704         # match <hash>
1705         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1706                 # can match only for combined diff
1707                 $line = 'index ';
1708                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1709                         if ($from->{'href'}[$i]) {
1710                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1711                                                   -class=>"hash"},
1712                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1713                         } else {
1714                                 $line .= '0' x 7;
1715                         }
1716                         # separator
1717                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1718                 }
1719                 $line .= '..';
1720                 if ($to->{'href'}) {
1721                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1722                                          substr($diffinfo->{'to_id'},0,7));
1723                 } else {
1724                         $line .= '0' x 7;
1725                 }
1726
1727         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1728                 # can match only for ordinary diff
1729                 my ($from_link, $to_link);
1730                 if ($from->{'href'}) {
1731                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1732                                              substr($diffinfo->{'from_id'},0,7));
1733                 } else {
1734                         $from_link = '0' x 7;
1735                 }
1736                 if ($to->{'href'}) {
1737                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1738                                            substr($diffinfo->{'to_id'},0,7));
1739                 } else {
1740                         $to_link = '0' x 7;
1741                 }
1742                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1743                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1744         }
1745
1746         return $line . "<br/>\n";
1747 }
1748
1749 # format from-file/to-file diff header
1750 sub format_diff_from_to_header {
1751         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1752         my $line;
1753         my $result = '';
1754
1755         $line = $from_line;
1756         #assert($line =~ m/^---/) if DEBUG;
1757         # no extra formatting for "^--- /dev/null"
1758         if (! $diffinfo->{'nparents'}) {
1759                 # ordinary (single parent) diff
1760                 if ($line =~ m!^--- "?a/!) {
1761                         if ($from->{'href'}) {
1762                                 $line = '--- a/' .
1763                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1764                                                 esc_path($from->{'file'}));
1765                         } else {
1766                                 $line = '--- a/' .
1767                                         esc_path($from->{'file'});
1768                         }
1769                 }
1770                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1771
1772         } else {
1773                 # combined diff (merge commit)
1774                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1775                         if ($from->{'href'}[$i]) {
1776                                 $line = '--- ' .
1777                                         $cgi->a({-href=>href(action=>"blobdiff",
1778                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1779                                                              hash_parent_base=>$parents[$i],
1780                                                              file_parent=>$from->{'file'}[$i],
1781                                                              hash=>$diffinfo->{'to_id'},
1782                                                              hash_base=>$hash,
1783                                                              file_name=>$to->{'file'}),
1784                                                  -class=>"path",
1785                                                  -title=>"diff" . ($i+1)},
1786                                                 $i+1) .
1787                                         '/' .
1788                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1789                                                 esc_path($from->{'file'}[$i]));
1790                         } else {
1791                                 $line = '--- /dev/null';
1792                         }
1793                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1794                 }
1795         }
1796
1797         $line = $to_line;
1798         #assert($line =~ m/^\+\+\+/) if DEBUG;
1799         # no extra formatting for "^+++ /dev/null"
1800         if ($line =~ m!^\+\+\+ "?b/!) {
1801                 if ($to->{'href'}) {
1802                         $line = '+++ b/' .
1803                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1804                                         esc_path($to->{'file'}));
1805                 } else {
1806                         $line = '+++ b/' .
1807                                 esc_path($to->{'file'});
1808                 }
1809         }
1810         $result .= qq!<div class="diff to_file">$line</div>\n!;
1811
1812         return $result;
1813 }
1814
1815 # create note for patch simplified by combined diff
1816 sub format_diff_cc_simplified {
1817         my ($diffinfo, @parents) = @_;
1818         my $result = '';
1819
1820         $result .= "<div class=\"diff header\">" .
1821                    "diff --cc ";
1822         if (!is_deleted($diffinfo)) {
1823                 $result .= $cgi->a({-href => href(action=>"blob",
1824                                                   hash_base=>$hash,
1825                                                   hash=>$diffinfo->{'to_id'},
1826                                                   file_name=>$diffinfo->{'to_file'}),
1827                                     -class => "path"},
1828                                    esc_path($diffinfo->{'to_file'}));
1829         } else {
1830                 $result .= esc_path($diffinfo->{'to_file'});
1831         }
1832         $result .= "</div>\n" . # class="diff header"
1833                    "<div class=\"diff nodifferences\">" .
1834                    "Simple merge" .
1835                    "</div>\n"; # class="diff nodifferences"
1836
1837         return $result;
1838 }
1839
1840 # format patch (diff) line (not to be used for diff headers)
1841 sub format_diff_line {
1842         my $line = shift;
1843         my ($from, $to) = @_;
1844         my $diff_class = "";
1845
1846         chomp $line;
1847
1848         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1849                 # combined diff
1850                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1851                 if ($line =~ m/^\@{3}/) {
1852                         $diff_class = " chunk_header";
1853                 } elsif ($line =~ m/^\\/) {
1854                         $diff_class = " incomplete";
1855                 } elsif ($prefix =~ tr/+/+/) {
1856                         $diff_class = " add";
1857                 } elsif ($prefix =~ tr/-/-/) {
1858                         $diff_class = " rem";
1859                 }
1860         } else {
1861                 # assume ordinary diff
1862                 my $char = substr($line, 0, 1);
1863                 if ($char eq '+') {
1864                         $diff_class = " add";
1865                 } elsif ($char eq '-') {
1866                         $diff_class = " rem";
1867                 } elsif ($char eq '@') {
1868                         $diff_class = " chunk_header";
1869                 } elsif ($char eq "\\") {
1870                         $diff_class = " incomplete";
1871                 }
1872         }
1873         $line = untabify($line);
1874         if ($from && $to && $line =~ m/^\@{2} /) {
1875                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1876                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1877
1878                 $from_lines = 0 unless defined $from_lines;
1879                 $to_lines   = 0 unless defined $to_lines;
1880
1881                 if ($from->{'href'}) {
1882                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1883                                              -class=>"list"}, $from_text);
1884                 }
1885                 if ($to->{'href'}) {
1886                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1887                                              -class=>"list"}, $to_text);
1888                 }
1889                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1890                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1891                 return "<div class=\"diff$diff_class\">$line</div>\n";
1892         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1893                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1894                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1895
1896                 @from_text = split(' ', $ranges);
1897                 for (my $i = 0; $i < @from_text; ++$i) {
1898                         ($from_start[$i], $from_nlines[$i]) =
1899                                 (split(',', substr($from_text[$i], 1)), 0);
1900                 }
1901
1902                 $to_text   = pop @from_text;
1903                 $to_start  = pop @from_start;
1904                 $to_nlines = pop @from_nlines;
1905
1906                 $line = "<span class=\"chunk_info\">$prefix ";
1907                 for (my $i = 0; $i < @from_text; ++$i) {
1908                         if ($from->{'href'}[$i]) {
1909                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1910                                                   -class=>"list"}, $from_text[$i]);
1911                         } else {
1912                                 $line .= $from_text[$i];
1913                         }
1914                         $line .= " ";
1915                 }
1916                 if ($to->{'href'}) {
1917                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1918                                           -class=>"list"}, $to_text);
1919                 } else {
1920                         $line .= $to_text;
1921                 }
1922                 $line .= " $prefix</span>" .
1923                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1924                 return "<div class=\"diff$diff_class\">$line</div>\n";
1925         }
1926         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1927 }
1928
1929 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1930 # linked.  Pass the hash of the tree/commit to snapshot.
1931 sub format_snapshot_links {
1932         my ($hash) = @_;
1933         my $num_fmts = @snapshot_fmts;
1934         if ($num_fmts > 1) {
1935                 # A parenthesized list of links bearing format names.
1936                 # e.g. "snapshot (_tar.gz_ _zip_)"
1937                 return "snapshot (" . join(' ', map
1938                         $cgi->a({
1939                                 -href => href(
1940                                         action=>"snapshot",
1941                                         hash=>$hash,
1942                                         snapshot_format=>$_
1943                                 )
1944                         }, $known_snapshot_formats{$_}{'display'})
1945                 , @snapshot_fmts) . ")";
1946         } elsif ($num_fmts == 1) {
1947                 # A single "snapshot" link whose tooltip bears the format name.
1948                 # i.e. "_snapshot_"
1949                 my ($fmt) = @snapshot_fmts;
1950                 return
1951                         $cgi->a({
1952                                 -href => href(
1953                                         action=>"snapshot",
1954                                         hash=>$hash,
1955                                         snapshot_format=>$fmt
1956                                 ),
1957                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1958                         }, "snapshot");
1959         } else { # $num_fmts == 0
1960                 return undef;
1961         }
1962 }
1963
1964 ## ......................................................................
1965 ## functions returning values to be passed, perhaps after some
1966 ## transformation, to other functions; e.g. returning arguments to href()
1967
1968 # returns hash to be passed to href to generate gitweb URL
1969 # in -title key it returns description of link
1970 sub get_feed_info {
1971         my $format = shift || 'Atom';
1972         my %res = (action => lc($format));
1973
1974         # feed links are possible only for project views
1975         return unless (defined $project);
1976         # some views should link to OPML, or to generic project feed,
1977         # or don't have specific feed yet (so they should use generic)
1978         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1979
1980         my $branch;
1981         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1982         # from tag links; this also makes possible to detect branch links
1983         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1984             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1985                 $branch = $1;
1986         }
1987         # find log type for feed description (title)
1988         my $type = 'log';
1989         if (defined $file_name) {
1990                 $type  = "history of $file_name";
1991                 $type .= "/" if ($action eq 'tree');
1992                 $type .= " on '$branch'" if (defined $branch);
1993         } else {
1994                 $type = "log of $branch" if (defined $branch);
1995         }
1996
1997         $res{-title} = $type;
1998         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1999         $res{'file_name'} = $file_name;
2000
2001         return %res;
2002 }
2003
2004 ## ----------------------------------------------------------------------
2005 ## git utility subroutines, invoking git commands
2006
2007 # returns path to the core git executable and the --git-dir parameter as list
2008 sub git_cmd {
2009         return $GIT, '--git-dir='.$git_dir;
2010 }
2011
2012 # quote the given arguments for passing them to the shell
2013 # quote_command("command", "arg 1", "arg with ' and ! characters")
2014 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2015 # Try to avoid using this function wherever possible.
2016 sub quote_command {
2017         return join(' ',
2018                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2019 }
2020
2021 # get HEAD ref of given project as hash
2022 sub git_get_head_hash {
2023         return git_get_full_hash(shift, 'HEAD');
2024 }
2025
2026 sub git_get_full_hash {
2027         return git_get_hash(@_);
2028 }
2029
2030 sub git_get_short_hash {
2031         return git_get_hash(@_, '--short=7');
2032 }
2033
2034 sub git_get_hash {
2035         my ($project, $hash, @options) = @_;
2036         my $o_git_dir = $git_dir;
2037         my $retval = undef;
2038         $git_dir = "$projectroot/$project";
2039         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2040             '--verify', '-q', @options, $hash) {
2041                 $retval = <$fd>;
2042                 chomp $retval if defined $retval;
2043                 close $fd;
2044         }
2045         if (defined $o_git_dir) {
2046                 $git_dir = $o_git_dir;
2047         }
2048         return $retval;
2049 }
2050
2051 # get type of given object
2052 sub git_get_type {
2053         my $hash = shift;
2054
2055         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2056         my $type = <$fd>;
2057         close $fd or return;
2058         chomp $type;
2059         return $type;
2060 }
2061
2062 # repository configuration
2063 our $config_file = '';
2064 our %config;
2065
2066 # store multiple values for single key as anonymous array reference
2067 # single values stored directly in the hash, not as [ <value> ]
2068 sub hash_set_multi {
2069         my ($hash, $key, $value) = @_;
2070
2071         if (!exists $hash->{$key}) {
2072                 $hash->{$key} = $value;
2073         } elsif (!ref $hash->{$key}) {
2074                 $hash->{$key} = [ $hash->{$key}, $value ];
2075         } else {
2076                 push @{$hash->{$key}}, $value;
2077         }
2078 }
2079
2080 # return hash of git project configuration
2081 # optionally limited to some section, e.g. 'gitweb'
2082 sub git_parse_project_config {
2083         my $section_regexp = shift;
2084         my %config;
2085
2086         local $/ = "\0";
2087
2088         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2089                 or return;
2090
2091         while (my $keyval = <$fh>) {
2092                 chomp $keyval;
2093                 my ($key, $value) = split(/\n/, $keyval, 2);
2094
2095                 hash_set_multi(\%config, $key, $value)
2096                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2097         }
2098         close $fh;
2099
2100         return %config;
2101 }
2102
2103 # convert config value to boolean: 'true' or 'false'
2104 # no value, number > 0, 'true' and 'yes' values are true
2105 # rest of values are treated as false (never as error)
2106 sub config_to_bool {
2107         my $val = shift;
2108
2109         return 1 if !defined $val;             # section.key
2110
2111         # strip leading and trailing whitespace
2112         $val =~ s/^\s+//;
2113         $val =~ s/\s+$//;
2114
2115         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2116                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2117 }
2118
2119 # convert config value to simple decimal number
2120 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2121 # to be multiplied by 1024, 1048576, or 1073741824
2122 sub config_to_int {
2123         my $val = shift;
2124
2125         # strip leading and trailing whitespace
2126         $val =~ s/^\s+//;
2127         $val =~ s/\s+$//;
2128
2129         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2130                 $unit = lc($unit);
2131                 # unknown unit is treated as 1
2132                 return $num * ($unit eq 'g' ? 1073741824 :
2133                                $unit eq 'm' ?    1048576 :
2134                                $unit eq 'k' ?       1024 : 1);
2135         }
2136         return $val;
2137 }
2138
2139 # convert config value to array reference, if needed
2140 sub config_to_multi {
2141         my $val = shift;
2142
2143         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2144 }
2145
2146 sub git_get_project_config {
2147         my ($key, $type) = @_;
2148
2149         # key sanity check
2150         return unless ($key);
2151         $key =~ s/^gitweb\.//;
2152         return if ($key =~ m/\W/);
2153
2154         # type sanity check
2155         if (defined $type) {
2156                 $type =~ s/^--//;
2157                 $type = undef
2158                         unless ($type eq 'bool' || $type eq 'int');
2159         }
2160
2161         # get config
2162         if (!defined $config_file ||
2163             $config_file ne "$git_dir/config") {
2164                 %config = git_parse_project_config('gitweb');
2165                 $config_file = "$git_dir/config";
2166         }
2167
2168         # check if config variable (key) exists
2169         return unless exists $config{"gitweb.$key"};
2170
2171         # ensure given type
2172         if (!defined $type) {
2173                 return $config{"gitweb.$key"};
2174         } elsif ($type eq 'bool') {
2175                 # backward compatibility: 'git config --bool' returns true/false
2176                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2177         } elsif ($type eq 'int') {
2178                 return config_to_int($config{"gitweb.$key"});
2179         }
2180         return $config{"gitweb.$key"};
2181 }
2182
2183 # get hash of given path at given ref
2184 sub git_get_hash_by_path {
2185         my $base = shift;
2186         my $path = shift || return undef;
2187         my $type = shift;
2188
2189         $path =~ s,/+$,,;
2190
2191         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2192                 or die_error(500, "Open git-ls-tree failed");
2193         my $line = <$fd>;
2194         close $fd or return undef;
2195
2196         if (!defined $line) {
2197                 # there is no tree or hash given by $path at $base
2198                 return undef;
2199         }
2200
2201         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2202         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2203         if (defined $type && $type ne $2) {
2204                 # type doesn't match
2205                 return undef;
2206         }
2207         return $3;
2208 }
2209
2210 # get path of entry with given hash at given tree-ish (ref)
2211 # used to get 'from' filename for combined diff (merge commit) for renames
2212 sub git_get_path_by_hash {
2213         my $base = shift || return;
2214         my $hash = shift || return;
2215
2216         local $/ = "\0";
2217
2218         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2219                 or return undef;
2220         while (my $line = <$fd>) {
2221                 chomp $line;
2222
2223                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2224                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2225                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2226                         close $fd;
2227                         return $1;
2228                 }
2229         }
2230         close $fd;
2231         return undef;
2232 }
2233
2234 ## ......................................................................
2235 ## git utility functions, directly accessing git repository
2236
2237 sub git_get_project_description {
2238         my $path = shift;
2239
2240         $git_dir = "$projectroot/$path";
2241         open my $fd, '<', "$git_dir/description"
2242                 or return git_get_project_config('description');
2243         my $descr = <$fd>;
2244         close $fd;
2245         if (defined $descr) {
2246                 chomp $descr;
2247         }
2248         return $descr;
2249 }
2250
2251 sub git_get_project_ctags {
2252         my $path = shift;
2253         my $ctags = {};
2254
2255         $git_dir = "$projectroot/$path";
2256         opendir my $dh, "$git_dir/ctags"
2257                 or return $ctags;
2258         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2259                 open my $ct, '<', $_ or next;
2260                 my $val = <$ct>;
2261                 chomp $val;
2262                 close $ct;
2263                 my $ctag = $_; $ctag =~ s#.*/##;
2264                 $ctags->{$ctag} = $val;
2265         }
2266         closedir $dh;
2267         $ctags;
2268 }
2269
2270 sub git_populate_project_tagcloud {
2271         my $ctags = shift;
2272
2273         # First, merge different-cased tags; tags vote on casing
2274         my %ctags_lc;
2275         foreach (keys %$ctags) {
2276                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2277                 if (not $ctags_lc{lc $_}->{topcount}
2278                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2279                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2280                         $ctags_lc{lc $_}->{topname} = $_;
2281                 }
2282         }
2283
2284         my $cloud;
2285         if (eval { require HTML::TagCloud; 1; }) {
2286                 $cloud = HTML::TagCloud->new;
2287                 foreach (sort keys %ctags_lc) {
2288                         # Pad the title with spaces so that the cloud looks
2289                         # less crammed.
2290                         my $title = $ctags_lc{$_}->{topname};
2291                         $title =~ s/ /&nbsp;/g;
2292                         $title =~ s/^/&nbsp;/g;
2293                         $title =~ s/$/&nbsp;/g;
2294                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2295                 }
2296         } else {
2297                 $cloud = \%ctags_lc;
2298         }
2299         $cloud;
2300 }
2301
2302 sub git_show_project_tagcloud {
2303         my ($cloud, $count) = @_;
2304         print STDERR ref($cloud)."..\n";
2305         if (ref $cloud eq 'HTML::TagCloud') {
2306                 return $cloud->html_and_css($count);
2307         } else {
2308                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2309                 return '<p align="center">' . join (', ', map {
2310                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2311                 } splice(@tags, 0, $count)) . '</p>';
2312         }
2313 }
2314
2315 sub git_get_project_url_list {
2316         my $path = shift;
2317
2318         $git_dir = "$projectroot/$path";
2319         open my $fd, '<', "$git_dir/cloneurl"
2320                 or return wantarray ?
2321                 @{ config_to_multi(git_get_project_config('url')) } :
2322                    config_to_multi(git_get_project_config('url'));
2323         my @git_project_url_list = map { chomp; $_ } <$fd>;
2324         close $fd;
2325
2326         return wantarray ? @git_project_url_list : \@git_project_url_list;
2327 }
2328
2329 sub git_get_projects_list {
2330         my ($filter) = @_;
2331         my @list;
2332
2333         $filter ||= '';
2334         $filter =~ s/\.git$//;
2335
2336         my $check_forks = gitweb_check_feature('forks');
2337
2338         if (-d $projects_list) {
2339                 # search in directory
2340                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2341                 # remove the trailing "/"
2342                 $dir =~ s!/+$!!;
2343                 my $pfxlen = length("$dir");
2344                 my $pfxdepth = ($dir =~ tr!/!!);
2345
2346                 File::Find::find({
2347                         follow_fast => 1, # follow symbolic links
2348                         follow_skip => 2, # ignore duplicates
2349                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2350                         wanted => sub {
2351                                 # skip project-list toplevel, if we get it.
2352                                 return if (m!^[/.]$!);
2353                                 # only directories can be git repositories
2354                                 return unless (-d $_);
2355                                 # don't traverse too deep (Find is super slow on os x)
2356                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2357                                         $File::Find::prune = 1;
2358                                         return;
2359                                 }
2360
2361                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2362                                 # we check related file in $projectroot
2363                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2364                                 if (check_export_ok("$projectroot/$path")) {
2365                                         push @list, { path => $path };
2366                                         $File::Find::prune = 1;
2367                                 }
2368                         },
2369                 }, "$dir");
2370
2371         } elsif (-f $projects_list) {
2372                 # read from file(url-encoded):
2373                 # 'git%2Fgit.git Linus+Torvalds'
2374                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2375                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2376                 my %paths;
2377                 open my $fd, '<', $projects_list or return;
2378         PROJECT:
2379                 while (my $line = <$fd>) {
2380                         chomp $line;
2381                         my ($path, $owner) = split ' ', $line;
2382                         $path = unescape($path);
2383                         $owner = unescape($owner);
2384                         if (!defined $path) {
2385                                 next;
2386                         }
2387                         if ($filter ne '') {
2388                                 # looking for forks;
2389                                 my $pfx = substr($path, 0, length($filter));
2390                                 if ($pfx ne $filter) {
2391                                         next PROJECT;
2392                                 }
2393                                 my $sfx = substr($path, length($filter));
2394                                 if ($sfx !~ /^\/.*\.git$/) {
2395                                         next PROJECT;
2396                                 }
2397                         } elsif ($check_forks) {
2398                         PATH:
2399                                 foreach my $filter (keys %paths) {
2400                                         # looking for forks;
2401                                         my $pfx = substr($path, 0, length($filter));
2402                                         if ($pfx ne $filter) {
2403                                                 next PATH;
2404                                         }
2405                                         my $sfx = substr($path, length($filter));
2406                                         if ($sfx !~ /^\/.*\.git$/) {
2407                                                 next PATH;
2408                                         }
2409                                         # is a fork, don't include it in
2410                                         # the list
2411                                         next PROJECT;
2412                                 }
2413                         }
2414                         if (check_export_ok("$projectroot/$path")) {
2415                                 my $pr = {
2416                                         path => $path,
2417                                         owner => to_utf8($owner),
2418                                 };
2419                                 push @list, $pr;
2420                                 (my $forks_path = $path) =~ s/\.git$//;
2421                                 $paths{$forks_path}++;
2422                         }
2423                 }
2424                 close $fd;
2425         }
2426         return @list;
2427 }
2428
2429 our $gitweb_project_owner = undef;
2430 sub git_get_project_list_from_file {
2431
2432         return if (defined $gitweb_project_owner);
2433
2434         $gitweb_project_owner = {};
2435         # read from file (url-encoded):
2436         # 'git%2Fgit.git Linus+Torvalds'
2437         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2438         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2439         if (-f $projects_list) {
2440                 open(my $fd, '<', $projects_list);
2441                 while (my $line = <$fd>) {
2442                         chomp $line;
2443                         my ($pr, $ow) = split ' ', $line;
2444                         $pr = unescape($pr);
2445                         $ow = unescape($ow);
2446                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2447                 }
2448                 close $fd;
2449         }
2450 }
2451
2452 sub git_get_project_owner {
2453         my $project = shift;
2454         my $owner;
2455
2456         return undef unless $project;
2457         $git_dir = "$projectroot/$project";
2458
2459         if (!defined $gitweb_project_owner) {
2460                 git_get_project_list_from_file();
2461         }
2462
2463         if (exists $gitweb_project_owner->{$project}) {
2464                 $owner = $gitweb_project_owner->{$project};
2465         }
2466         if (!defined $owner){
2467                 $owner = git_get_project_config('owner');
2468         }
2469         if (!defined $owner) {
2470                 $owner = get_file_owner("$git_dir");
2471         }
2472
2473         return $owner;
2474 }
2475
2476 sub git_get_last_activity {
2477         my ($path) = @_;
2478         my $fd;
2479
2480         $git_dir = "$projectroot/$path";
2481         open($fd, "-|", git_cmd(), 'for-each-ref',
2482              '--format=%(committer)',
2483              '--sort=-committerdate',
2484              '--count=1',
2485              'refs/heads') or return;
2486         my $most_recent = <$fd>;
2487         close $fd or return;
2488         if (defined $most_recent &&
2489             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2490                 my $timestamp = $1;
2491                 my $age = time - $timestamp;
2492                 return ($age, age_string($age));
2493         }
2494         return (undef, undef);
2495 }
2496
2497 sub git_get_references {
2498         my $type = shift || "";
2499         my %refs;
2500         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2501         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2502         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2503                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2504                 or return;
2505
2506         while (my $line = <$fd>) {
2507                 chomp $line;
2508                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2509                         if (defined $refs{$1}) {
2510                                 push @{$refs{$1}}, $2;
2511                         } else {
2512                                 $refs{$1} = [ $2 ];
2513                         }
2514                 }
2515         }
2516         close $fd or return;
2517         return \%refs;
2518 }
2519
2520 sub git_get_rev_name_tags {
2521         my $hash = shift || return undef;
2522
2523         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2524                 or return;
2525         my $name_rev = <$fd>;
2526         close $fd;
2527
2528         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2529                 return $1;
2530         } else {
2531                 # catches also '$hash undefined' output
2532                 return undef;
2533         }
2534 }
2535
2536 ## ----------------------------------------------------------------------
2537 ## parse to hash functions
2538
2539 sub parse_date {
2540         my $epoch = shift;
2541         my $tz = shift || "-0000";
2542
2543         my %date;
2544         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2545         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2546         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2547         $date{'hour'} = $hour;
2548         $date{'minute'} = $min;
2549         $date{'mday'} = $mday;
2550         $date{'day'} = $days[$wday];
2551         $date{'month'} = $months[$mon];
2552         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2553                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2554         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2555                              $mday, $months[$mon], $hour ,$min;
2556         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2557                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2558
2559         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2560         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2561         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2562         $date{'hour_local'} = $hour;
2563         $date{'minute_local'} = $min;
2564         $date{'tz_local'} = $tz;
2565         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2566                                   1900+$year, $mon+1, $mday,
2567                                   $hour, $min, $sec, $tz);
2568         return %date;
2569 }
2570
2571 sub parse_tag {
2572         my $tag_id = shift;
2573         my %tag;
2574         my @comment;
2575
2576         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2577         $tag{'id'} = $tag_id;
2578         while (my $line = <$fd>) {
2579                 chomp $line;
2580                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2581                         $tag{'object'} = $1;
2582                 } elsif ($line =~ m/^type (.+)$/) {
2583                         $tag{'type'} = $1;
2584                 } elsif ($line =~ m/^tag (.+)$/) {
2585                         $tag{'name'} = $1;
2586                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2587                         $tag{'author'} = $1;
2588                         $tag{'author_epoch'} = $2;
2589                         $tag{'author_tz'} = $3;
2590                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2591                                 $tag{'author_name'}  = $1;
2592                                 $tag{'author_email'} = $2;
2593                         } else {
2594                                 $tag{'author_name'} = $tag{'author'};
2595                         }
2596                 } elsif ($line =~ m/--BEGIN/) {
2597                         push @comment, $line;
2598                         last;
2599                 } elsif ($line eq "") {
2600                         last;
2601                 }
2602         }
2603         push @comment, <$fd>;
2604         $tag{'comment'} = \@comment;
2605         close $fd or return;
2606         if (!defined $tag{'name'}) {
2607                 return
2608         };
2609         return %tag
2610 }
2611
2612 sub parse_commit_text {
2613         my ($commit_text, $withparents) = @_;
2614         my @commit_lines = split '\n', $commit_text;
2615         my %co;
2616
2617         pop @commit_lines; # Remove '\0'
2618
2619         if (! @commit_lines) {
2620                 return;
2621         }
2622
2623         my $header = shift @commit_lines;
2624         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2625                 return;
2626         }
2627         ($co{'id'}, my @parents) = split ' ', $header;
2628         while (my $line = shift @commit_lines) {
2629                 last if $line eq "\n";
2630                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2631                         $co{'tree'} = $1;
2632                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2633                         push @parents, $1;
2634                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2635                         $co{'author'} = to_utf8($1);
2636                         $co{'author_epoch'} = $2;
2637                         $co{'author_tz'} = $3;
2638                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2639                                 $co{'author_name'}  = $1;
2640                                 $co{'author_email'} = $2;
2641                         } else {
2642                                 $co{'author_name'} = $co{'author'};
2643                         }
2644                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2645                         $co{'committer'} = to_utf8($1);
2646                         $co{'committer_epoch'} = $2;
2647                         $co{'committer_tz'} = $3;
2648                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2649                                 $co{'committer_name'}  = $1;
2650                                 $co{'committer_email'} = $2;
2651                         } else {
2652                                 $co{'committer_name'} = $co{'committer'};
2653                         }
2654                 }
2655         }
2656         if (!defined $co{'tree'}) {
2657                 return;
2658         };
2659         $co{'parents'} = \@parents;
2660         $co{'parent'} = $parents[0];
2661
2662         foreach my $title (@commit_lines) {
2663                 $title =~ s/^    //;
2664                 if ($title ne "") {
2665                         $co{'title'} = chop_str($title, 80, 5);
2666                         # remove leading stuff of merges to make the interesting part visible
2667                         if (length($title) > 50) {
2668                                 $title =~ s/^Automatic //;
2669                                 $title =~ s/^merge (of|with) /Merge ... /i;
2670                                 if (length($title) > 50) {
2671                                         $title =~ s/(http|rsync):\/\///;
2672                                 }
2673                                 if (length($title) > 50) {
2674                                         $title =~ s/(master|www|rsync)\.//;
2675                                 }
2676                                 if (length($title) > 50) {
2677                                         $title =~ s/kernel.org:?//;
2678                                 }
2679                                 if (length($title) > 50) {
2680                                         $title =~ s/\/pub\/scm//;
2681                                 }
2682                         }
2683                         $co{'title_short'} = chop_str($title, 50, 5);
2684                         last;
2685                 }
2686         }
2687         if (! defined $co{'title'} || $co{'title'} eq "") {
2688                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2689         }
2690         # remove added spaces
2691         foreach my $line (@commit_lines) {
2692                 $line =~ s/^    //;
2693         }
2694         $co{'comment'} = \@commit_lines;
2695
2696         my $age = time - $co{'committer_epoch'};
2697         $co{'age'} = $age;
2698         $co{'age_string'} = age_string($age);
2699         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2700         if ($age > 60*60*24*7*2) {
2701                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2702                 $co{'age_string_age'} = $co{'age_string'};
2703         } else {
2704                 $co{'age_string_date'} = $co{'age_string'};
2705                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2706         }
2707         return %co;
2708 }
2709
2710 sub parse_commit {
2711         my ($commit_id) = @_;
2712         my %co;
2713
2714         local $/ = "\0";
2715
2716         open my $fd, "-|", git_cmd(), "rev-list",
2717                 "--parents",
2718                 "--header",
2719                 "--max-count=1",
2720                 $commit_id,
2721                 "--",
2722                 or die_error(500, "Open git-rev-list failed");
2723         %co = parse_commit_text(<$fd>, 1);
2724         close $fd;
2725
2726         return %co;
2727 }
2728
2729 sub parse_commits {
2730         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2731         my @cos;
2732
2733         $maxcount ||= 1;
2734         $skip ||= 0;
2735
2736         local $/ = "\0";
2737
2738         open my $fd, "-|", git_cmd(), "rev-list",
2739                 "--header",
2740                 @args,
2741                 ("--max-count=" . $maxcount),
2742                 ("--skip=" . $skip),
2743                 @extra_options,
2744                 $commit_id,
2745                 "--",
2746                 ($filename ? ($filename) : ())
2747                 or die_error(500, "Open git-rev-list failed");
2748         while (my $line = <$fd>) {
2749                 my %co = parse_commit_text($line);
2750                 push @cos, \%co;
2751         }
2752         close $fd;
2753
2754         return wantarray ? @cos : \@cos;
2755 }
2756
2757 # parse line of git-diff-tree "raw" output
2758 sub parse_difftree_raw_line {
2759         my $line = shift;
2760         my %res;
2761
2762         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2763         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2764         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2765                 $res{'from_mode'} = $1;
2766                 $res{'to_mode'} = $2;
2767                 $res{'from_id'} = $3;
2768                 $res{'to_id'} = $4;
2769                 $res{'status'} = $5;
2770                 $res{'similarity'} = $6;
2771                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2772                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2773                 } else {
2774                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2775                 }
2776         }
2777         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2778         # combined diff (for merge commit)
2779         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2780                 $res{'nparents'}  = length($1);
2781                 $res{'from_mode'} = [ split(' ', $2) ];
2782                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2783                 $res{'from_id'} = [ split(' ', $3) ];
2784                 $res{'to_id'} = pop @{$res{'from_id'}};
2785                 $res{'status'} = [ split('', $4) ];
2786                 $res{'to_file'} = unquote($5);
2787         }
2788         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2789         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2790                 $res{'commit'} = $1;
2791         }
2792
2793         return wantarray ? %res : \%res;
2794 }
2795
2796 # wrapper: return parsed line of git-diff-tree "raw" output
2797 # (the argument might be raw line, or parsed info)
2798 sub parsed_difftree_line {
2799         my $line_or_ref = shift;
2800
2801         if (ref($line_or_ref) eq "HASH") {
2802                 # pre-parsed (or generated by hand)
2803                 return $line_or_ref;
2804         } else {
2805                 return parse_difftree_raw_line($line_or_ref);
2806         }
2807 }
2808
2809 # parse line of git-ls-tree output
2810 sub parse_ls_tree_line {
2811         my $line = shift;
2812         my %opts = @_;
2813         my %res;
2814
2815         if ($opts{'-l'}) {
2816                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2817                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2818
2819                 $res{'mode'} = $1;
2820                 $res{'type'} = $2;
2821                 $res{'hash'} = $3;
2822                 $res{'size'} = $4;
2823                 if ($opts{'-z'}) {
2824                         $res{'name'} = $5;
2825                 } else {
2826                         $res{'name'} = unquote($5);
2827                 }
2828         } else {
2829                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2830                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2831
2832                 $res{'mode'} = $1;
2833                 $res{'type'} = $2;
2834                 $res{'hash'} = $3;
2835                 if ($opts{'-z'}) {
2836                         $res{'name'} = $4;
2837                 } else {
2838                         $res{'name'} = unquote($4);
2839                 }
2840         }
2841
2842         return wantarray ? %res : \%res;
2843 }
2844
2845 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2846 sub parse_from_to_diffinfo {
2847         my ($diffinfo, $from, $to, @parents) = @_;
2848
2849         if ($diffinfo->{'nparents'}) {
2850                 # combined diff
2851                 $from->{'file'} = [];
2852                 $from->{'href'} = [];
2853                 fill_from_file_info($diffinfo, @parents)
2854                         unless exists $diffinfo->{'from_file'};
2855                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2856                         $from->{'file'}[$i] =
2857                                 defined $diffinfo->{'from_file'}[$i] ?
2858                                         $diffinfo->{'from_file'}[$i] :
2859                                         $diffinfo->{'to_file'};
2860                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2861                                 $from->{'href'}[$i] = href(action=>"blob",
2862                                                            hash_base=>$parents[$i],
2863                                                            hash=>$diffinfo->{'from_id'}[$i],
2864                                                            file_name=>$from->{'file'}[$i]);
2865                         } else {
2866                                 $from->{'href'}[$i] = undef;
2867                         }
2868                 }
2869         } else {
2870                 # ordinary (not combined) diff
2871                 $from->{'file'} = $diffinfo->{'from_file'};
2872                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2873                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2874                                                hash=>$diffinfo->{'from_id'},
2875                                                file_name=>$from->{'file'});
2876                 } else {
2877                         delete $from->{'href'};
2878                 }
2879         }
2880
2881         $to->{'file'} = $diffinfo->{'to_file'};
2882         if (!is_deleted($diffinfo)) { # file exists in result
2883                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2884                                      hash=>$diffinfo->{'to_id'},
2885                                      file_name=>$to->{'file'});
2886         } else {
2887                 delete $to->{'href'};
2888         }
2889 }
2890
2891 ## ......................................................................
2892 ## parse to array of hashes functions
2893
2894 sub git_get_heads_list {
2895         my $limit = shift;
2896         my @headslist;
2897
2898         open my $fd, '-|', git_cmd(), 'for-each-ref',
2899                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2900                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2901                 'refs/heads'
2902                 or return;
2903         while (my $line = <$fd>) {
2904                 my %ref_item;
2905
2906                 chomp $line;
2907                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2908                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2909                 my ($committer, $epoch, $tz) =
2910                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2911                 $ref_item{'fullname'}  = $name;
2912                 $name =~ s!^refs/heads/!!;
2913
2914                 $ref_item{'name'}  = $name;
2915                 $ref_item{'id'}    = $hash;
2916                 $ref_item{'title'} = $title || '(no commit message)';
2917                 $ref_item{'epoch'} = $epoch;
2918                 if ($epoch) {
2919                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2920                 } else {
2921                         $ref_item{'age'} = "unknown";
2922                 }
2923
2924                 push @headslist, \%ref_item;
2925         }
2926         close $fd;
2927
2928         return wantarray ? @headslist : \@headslist;
2929 }
2930
2931 sub git_get_tags_list {
2932         my $limit = shift;
2933         my @tagslist;
2934
2935         open my $fd, '-|', git_cmd(), 'for-each-ref',
2936                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2937                 '--format=%(objectname) %(objecttype) %(refname) '.
2938                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2939                 'refs/tags'
2940                 or return;
2941         while (my $line = <$fd>) {
2942                 my %ref_item;
2943
2944                 chomp $line;
2945                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2946                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2947                 my ($creator, $epoch, $tz) =
2948                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2949                 $ref_item{'fullname'} = $name;
2950                 $name =~ s!^refs/tags/!!;
2951
2952                 $ref_item{'type'} = $type;
2953                 $ref_item{'id'} = $id;
2954                 $ref_item{'name'} = $name;
2955                 if ($type eq "tag") {
2956                         $ref_item{'subject'} = $title;
2957                         $ref_item{'reftype'} = $reftype;
2958                         $ref_item{'refid'}   = $refid;
2959                 } else {
2960                         $ref_item{'reftype'} = $type;
2961                         $ref_item{'refid'}   = $id;
2962                 }
2963
2964                 if ($type eq "tag" || $type eq "commit") {
2965                         $ref_item{'epoch'} = $epoch;
2966                         if ($epoch) {
2967                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2968                         } else {
2969                                 $ref_item{'age'} = "unknown";
2970                         }
2971                 }
2972
2973                 push @tagslist, \%ref_item;
2974         }
2975         close $fd;
2976
2977         return wantarray ? @tagslist : \@tagslist;
2978 }
2979
2980 ## ----------------------------------------------------------------------
2981 ## filesystem-related functions
2982
2983 sub get_file_owner {
2984         my $path = shift;
2985
2986         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2987         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2988         if (!defined $gcos) {
2989                 return undef;
2990         }
2991         my $owner = $gcos;
2992         $owner =~ s/[,;].*$//;
2993         return to_utf8($owner);
2994 }
2995
2996 # assume that file exists
2997 sub insert_file {
2998         my $filename = shift;
2999
3000         open my $fd, '<', $filename;
3001         print map { to_utf8($_) } <$fd>;
3002         close $fd;
3003 }
3004
3005 ## ......................................................................
3006 ## mimetype related functions
3007
3008 sub mimetype_guess_file {
3009         my $filename = shift;
3010         my $mimemap = shift;
3011         -r $mimemap or return undef;
3012
3013         my %mimemap;
3014         open(my $mh, '<', $mimemap) or return undef;
3015         while (<$mh>) {
3016                 next if m/^#/; # skip comments
3017                 my ($mimetype, $exts) = split(/\t+/);
3018                 if (defined $exts) {
3019                         my @exts = split(/\s+/, $exts);
3020                         foreach my $ext (@exts) {
3021                                 $mimemap{$ext} = $mimetype;
3022                         }
3023                 }
3024         }
3025         close($mh);
3026
3027         $filename =~ /\.([^.]*)$/;
3028         return $mimemap{$1};
3029 }
3030
3031 sub mimetype_guess {
3032         my $filename = shift;
3033         my $mime;
3034         $filename =~ /\./ or return undef;
3035
3036         if ($mimetypes_file) {
3037                 my $file = $mimetypes_file;
3038                 if ($file !~ m!^/!) { # if it is relative path
3039                         # it is relative to project
3040                         $file = "$projectroot/$project/$file";
3041                 }
3042                 $mime = mimetype_guess_file($filename, $file);
3043         }
3044         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3045         return $mime;
3046 }
3047
3048 sub blob_mimetype {
3049         my $fd = shift;
3050         my $filename = shift;
3051
3052         if ($filename) {
3053                 my $mime = mimetype_guess($filename);
3054                 $mime and return $mime;
3055         }
3056
3057         # just in case
3058         return $default_blob_plain_mimetype unless $fd;
3059
3060         if (-T $fd) {
3061                 return 'text/plain';
3062         } elsif (! $filename) {
3063                 return 'application/octet-stream';
3064         } elsif ($filename =~ m/\.png$/i) {
3065                 return 'image/png';
3066         } elsif ($filename =~ m/\.gif$/i) {
3067                 return 'image/gif';
3068         } elsif ($filename =~ m/\.jpe?g$/i) {
3069                 return 'image/jpeg';
3070         } else {
3071                 return 'application/octet-stream';
3072         }
3073 }
3074
3075 sub blob_contenttype {
3076         my ($fd, $file_name, $type) = @_;
3077
3078         $type ||= blob_mimetype($fd, $file_name);
3079         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3080                 $type .= "; charset=$default_text_plain_charset";
3081         }
3082
3083         return $type;
3084 }
3085
3086 ## ======================================================================
3087 ## functions printing HTML: header, footer, error page
3088
3089 sub git_header_html {
3090         my $status = shift || "200 OK";
3091         my $expires = shift;
3092
3093         my $title = "$site_name";
3094         if (defined $project) {
3095                 $title .= " - " . to_utf8($project);
3096                 if (defined $action) {
3097                         $title .= "/$action";
3098                         if (defined $file_name) {
3099                                 $title .= " - " . esc_path($file_name);
3100                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3101                                         $title .= "/";
3102                                 }
3103                         }
3104                 }
3105         }
3106         my $content_type;
3107         # require explicit support from the UA if we are to send the page as
3108         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3109         # we have to do this because MSIE sometimes globs '*/*', pretending to
3110         # support xhtml+xml but choking when it gets what it asked for.
3111         if (defined $cgi->http('HTTP_ACCEPT') &&
3112             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3113             $cgi->Accept('application/xhtml+xml') != 0) {
3114                 $content_type = 'application/xhtml+xml';
3115         } else {
3116                 $content_type = 'text/html';
3117         }
3118         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3119                            -status=> $status, -expires => $expires);
3120         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3121         print <<EOF;
3122 <?xml version="1.0" encoding="utf-8"?>
3123 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3124 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3125 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3126 <!-- git core binaries version $git_version -->
3127 <head>
3128 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3129 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3130 <meta name="robots" content="index, nofollow"/>
3131 <title>$title</title>
3132 EOF
3133         # the stylesheet, favicon etc urls won't work correctly with path_info
3134         # unless we set the appropriate base URL
3135         if ($ENV{'PATH_INFO'}) {
3136                 print "<base href=\"".esc_url($base_url)."\" />\n";
3137         }
3138         # print out each stylesheet that exist, providing backwards capability
3139         # for those people who defined $stylesheet in a config file
3140         if (defined $stylesheet) {
3141                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3142         } else {
3143                 foreach my $stylesheet (@stylesheets) {
3144                         next unless $stylesheet;
3145                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3146                 }
3147         }
3148         if (defined $project) {
3149                 my %href_params = get_feed_info();
3150                 if (!exists $href_params{'-title'}) {
3151                         $href_params{'-title'} = 'log';
3152                 }
3153
3154                 foreach my $format qw(RSS Atom) {
3155                         my $type = lc($format);
3156                         my %link_attr = (
3157                                 '-rel' => 'alternate',
3158                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3159                                 '-type' => "application/$type+xml"
3160                         );
3161
3162                         $href_params{'action'} = $type;
3163                         $link_attr{'-href'} = href(%href_params);
3164                         print "<link ".
3165                               "rel=\"$link_attr{'-rel'}\" ".
3166                               "title=\"$link_attr{'-title'}\" ".
3167                               "href=\"$link_attr{'-href'}\" ".
3168                               "type=\"$link_attr{'-type'}\" ".
3169                               "/>\n";
3170
3171                         $href_params{'extra_options'} = '--no-merges';
3172                         $link_attr{'-href'} = href(%href_params);
3173                         $link_attr{'-title'} .= ' (no merges)';
3174                         print "<link ".
3175                               "rel=\"$link_attr{'-rel'}\" ".
3176                               "title=\"$link_attr{'-title'}\" ".
3177                               "href=\"$link_attr{'-href'}\" ".
3178                               "type=\"$link_attr{'-type'}\" ".
3179                               "/>\n";
3180                 }
3181
3182         } else {
3183                 printf('<link rel="alternate" title="%s projects list" '.
3184                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3185                        $site_name, href(project=>undef, action=>"project_index"));
3186                 printf('<link rel="alternate" title="%s projects feeds" '.
3187                        'href="%s" type="text/x-opml" />'."\n",
3188                        $site_name, href(project=>undef, action=>"opml"));
3189         }
3190         if (defined $favicon) {
3191                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3192         }
3193
3194         print "</head>\n" .
3195               "<body>\n";
3196
3197         if (-f $site_header) {
3198                 insert_file($site_header);
3199         }
3200
3201         print "<div class=\"page_header\">\n" .
3202               $cgi->a({-href => esc_url($logo_url),
3203                        -title => $logo_label},
3204                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3205         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3206         if (defined $project) {
3207                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3208                 if (defined $action) {
3209                         print " / $action";
3210                 }
3211                 print "\n";
3212         }
3213         print "</div>\n";
3214
3215         my $have_search = gitweb_check_feature('search');
3216         if (defined $project && $have_search) {
3217                 if (!defined $searchtext) {
3218                         $searchtext = "";
3219                 }
3220                 my $search_hash;
3221                 if (defined $hash_base) {
3222                         $search_hash = $hash_base;
3223                 } elsif (defined $hash) {
3224                         $search_hash = $hash;
3225                 } else {
3226                         $search_hash = "HEAD";
3227                 }
3228                 my $action = $my_uri;
3229                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3230                 if ($use_pathinfo) {
3231                         $action .= "/".esc_url($project);
3232                 }
3233                 print $cgi->startform(-method => "get", -action => $action) .
3234                       "<div class=\"search\">\n" .
3235                       (!$use_pathinfo &&
3236                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3237                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3238                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3239                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3240                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3241                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3242                       " search:\n",
3243                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3244                       "<span title=\"Extended regular expression\">" .
3245                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3246                                      -checked => $search_use_regexp) .
3247                       "</span>" .
3248                       "</div>" .
3249                       $cgi->end_form() . "\n";
3250         }
3251 }
3252
3253 sub git_footer_html {
3254         my $feed_class = 'rss_logo';
3255
3256         print "<div class=\"page_footer\">\n";
3257         if (defined $project) {
3258                 my $descr = git_get_project_description($project);
3259                 if (defined $descr) {
3260                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3261                 }
3262
3263                 my %href_params = get_feed_info();
3264                 if (!%href_params) {
3265                         $feed_class .= ' generic';
3266                 }
3267                 $href_params{'-title'} ||= 'log';
3268
3269                 foreach my $format qw(RSS Atom) {
3270                         $href_params{'action'} = lc($format);
3271                         print $cgi->a({-href => href(%href_params),
3272                                       -title => "$href_params{'-title'} $format feed",
3273                                       -class => $feed_class}, $format)."\n";
3274                 }
3275
3276         } else {
3277                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3278                               -class => $feed_class}, "OPML") . " ";
3279                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3280                               -class => $feed_class}, "TXT") . "\n";
3281         }
3282         print "</div>\n"; # class="page_footer"
3283
3284         if (-f $site_footer) {
3285                 insert_file($site_footer);
3286         }
3287
3288         print "</body>\n" .
3289               "</html>";
3290 }
3291
3292 # die_error(<http_status_code>, <error_message>)
3293 # Example: die_error(404, 'Hash not found')
3294 # By convention, use the following status codes (as defined in RFC 2616):
3295 # 400: Invalid or missing CGI parameters, or
3296 #      requested object exists but has wrong type.
3297 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3298 #      this server or project.
3299 # 404: Requested object/revision/project doesn't exist.
3300 # 500: The server isn't configured properly, or
3301 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3302 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3303 sub die_error {
3304         my $status = shift || 500;
3305         my $error = shift || "Internal server error";
3306
3307         my %http_responses = (400 => '400 Bad Request',
3308                               403 => '403 Forbidden',
3309                               404 => '404 Not Found',
3310                               500 => '500 Internal Server Error');
3311         git_header_html($http_responses{$status});
3312         print <<EOF;
3313 <div class="page_body">
3314 <br /><br />
3315 $status - $error
3316 <br />
3317 </div>
3318 EOF
3319         git_footer_html();
3320         exit;
3321 }
3322
3323 ## ----------------------------------------------------------------------
3324 ## functions printing or outputting HTML: navigation
3325
3326 sub git_print_page_nav {
3327         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3328         $extra = '' if !defined $extra; # pager or formats
3329
3330         my @navs = qw(summary shortlog log commit commitdiff tree);
3331         if ($suppress) {
3332                 @navs = grep { $_ ne $suppress } @navs;
3333         }
3334
3335         my %arg = map { $_ => {action=>$_} } @navs;
3336         if (defined $head) {
3337                 for (qw(commit commitdiff)) {
3338                         $arg{$_}{'hash'} = $head;
3339                 }
3340                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3341                         for (qw(shortlog log)) {
3342                                 $arg{$_}{'hash'} = $head;
3343                         }
3344                 }
3345         }
3346
3347         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3348         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3349
3350         my @actions = gitweb_get_feature('actions');
3351         my %repl = (
3352                 '%' => '%',
3353                 'n' => $project,         # project name
3354                 'f' => $git_dir,         # project path within filesystem
3355                 'h' => $treehead || '',  # current hash ('h' parameter)
3356                 'b' => $treebase || '',  # hash base ('hb' parameter)
3357         );
3358         while (@actions) {
3359                 my ($label, $link, $pos) = splice(@actions,0,3);
3360                 # insert
3361                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3362                 # munch munch
3363                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3364                 $arg{$label}{'_href'} = $link;
3365         }
3366
3367         print "<div class=\"page_nav\">\n" .
3368                 (join " | ",
3369                  map { $_ eq $current ?
3370                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3371                  } @navs);
3372         print "<br/>\n$extra<br/>\n" .
3373               "</div>\n";
3374 }
3375
3376 sub format_paging_nav {
3377         my ($action, $page, $has_next_link) = @_;
3378         my $paging_nav;
3379
3380
3381         if ($page > 0) {
3382                 $paging_nav .=
3383                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3384                         " &sdot; " .
3385                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3386                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3387         } else {
3388                 $paging_nav .= "first &sdot; prev";
3389         }
3390
3391         if ($has_next_link) {
3392                 $paging_nav .= " &sdot; " .
3393                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3394                                  -accesskey => "n", -title => "Alt-n"}, "next");
3395         } else {
3396                 $paging_nav .= " &sdot; next";
3397         }
3398
3399         return $paging_nav;
3400 }
3401
3402 ## ......................................................................
3403 ## functions printing or outputting HTML: div
3404
3405 sub git_print_header_div {
3406         my ($action, $title, $hash, $hash_base) = @_;
3407         my %args = ();
3408
3409         $args{'action'} = $action;
3410         $args{'hash'} = $hash if $hash;
3411         $args{'hash_base'} = $hash_base if $hash_base;
3412
3413         print "<div class=\"header\">\n" .
3414               $cgi->a({-href => href(%args), -class => "title"},
3415               $title ? $title : $action) .
3416               "\n</div>\n";
3417 }
3418
3419 sub print_local_time {
3420         my %date = @_;
3421         if ($date{'hour_local'} < 6) {
3422                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3423                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3424         } else {
3425                 printf(" (%02d:%02d %s)",
3426                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3427         }
3428 }
3429
3430 # Outputs the author name and date in long form
3431 sub git_print_authorship {
3432         my $co = shift;
3433         my %opts = @_;
3434         my $tag = $opts{-tag} || 'div';
3435         my $author = $co->{'author_name'};
3436
3437         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3438         print "<$tag class=\"author_date\">" .
3439               format_search_author($author, "author", esc_html($author)) .
3440               " [$ad{'rfc2822'}";
3441         print_local_time(%ad) if ($opts{-localtime});
3442         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3443                   . "</$tag>\n";
3444 }
3445
3446 # Outputs table rows containing the full author or committer information,
3447 # in the format expected for 'commit' view (& similia).
3448 # Parameters are a commit hash reference, followed by the list of people
3449 # to output information for. If the list is empty it defalts to both
3450 # author and committer.
3451 sub git_print_authorship_rows {
3452         my $co = shift;
3453         # too bad we can't use @people = @_ || ('author', 'committer')
3454         my @people = @_;
3455         @people = ('author', 'committer') unless @people;
3456         foreach my $who (@people) {
3457                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3458                 print "<tr><td>$who</td><td>" .
3459                       format_search_author($co->{"${who}_name"}, $who,
3460                                esc_html($co->{"${who}_name"})) . " " .
3461                       format_search_author($co->{"${who}_email"}, $who,
3462                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3463                       "</td><td rowspan=\"2\">" .
3464                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3465                       "</td></tr>\n" .
3466                       "<tr>" .
3467                       "<td></td><td> $wd{'rfc2822'}";
3468                 print_local_time(%wd);
3469                 print "</td>" .
3470                       "</tr>\n";
3471         }
3472 }
3473
3474 sub git_print_page_path {
3475         my $name = shift;
3476         my $type = shift;
3477         my $hb = shift;
3478
3479
3480         print "<div class=\"page_path\">";
3481         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3482                       -title => 'tree root'}, to_utf8("[$project]"));
3483         print " / ";
3484         if (defined $name) {
3485                 my @dirname = split '/', $name;
3486                 my $basename = pop @dirname;
3487                 my $fullname = '';
3488
3489                 foreach my $dir (@dirname) {
3490                         $fullname .= ($fullname ? '/' : '') . $dir;
3491                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3492                                                      hash_base=>$hb),
3493                                       -title => $fullname}, esc_path($dir));
3494                         print " / ";
3495                 }
3496                 if (defined $type && $type eq 'blob') {
3497                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3498                                                      hash_base=>$hb),
3499                                       -title => $name}, esc_path($basename));
3500                 } elsif (defined $type && $type eq 'tree') {
3501                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3502                                                      hash_base=>$hb),
3503                                       -title => $name}, esc_path($basename));
3504                         print " / ";
3505                 } else {
3506                         print esc_path($basename);
3507                 }
3508         }
3509         print "<br/></div>\n";
3510 }
3511
3512 sub git_print_log {
3513         my $log = shift;
3514         my %opts = @_;
3515
3516         if ($opts{'-remove_title'}) {
3517                 # remove title, i.e. first line of log
3518                 shift @$log;
3519         }
3520         # remove leading empty lines
3521         while (defined $log->[0] && $log->[0] eq "") {
3522                 shift @$log;
3523         }
3524
3525         # print log
3526         my $signoff = 0;
3527         my $empty = 0;
3528         foreach my $line (@$log) {
3529                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3530                         $signoff = 1;
3531                         $empty = 0;
3532                         if (! $opts{'-remove_signoff'}) {
3533                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3534                                 next;
3535                         } else {
3536                                 # remove signoff lines
3537                                 next;
3538                         }
3539                 } else {
3540                         $signoff = 0;
3541                 }
3542
3543                 # print only one empty line
3544                 # do not print empty line after signoff
3545                 if ($line eq "") {
3546                         next if ($empty || $signoff);
3547                         $empty = 1;
3548                 } else {
3549                         $empty = 0;
3550                 }
3551
3552                 print format_log_line_html($line) . "<br/>\n";
3553         }
3554
3555         if ($opts{'-final_empty_line'}) {
3556                 # end with single empty line
3557                 print "<br/>\n" unless $empty;
3558         }
3559 }
3560
3561 # return link target (what link points to)
3562 sub git_get_link_target {
3563         my $hash = shift;
3564         my $link_target;
3565
3566         # read link
3567         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3568                 or return;
3569         {
3570                 local $/ = undef;
3571                 $link_target = <$fd>;
3572         }
3573         close $fd
3574                 or return;
3575
3576         return $link_target;
3577 }
3578
3579 # given link target, and the directory (basedir) the link is in,
3580 # return target of link relative to top directory (top tree);
3581 # return undef if it is not possible (including absolute links).
3582 sub normalize_link_target {
3583         my ($link_target, $basedir) = @_;
3584
3585         # absolute symlinks (beginning with '/') cannot be normalized
3586         return if (substr($link_target, 0, 1) eq '/');
3587
3588         # normalize link target to path from top (root) tree (dir)
3589         my $path;
3590         if ($basedir) {
3591                 $path = $basedir . '/' . $link_target;
3592         } else {
3593                 # we are in top (root) tree (dir)
3594                 $path = $link_target;
3595         }
3596
3597         # remove //, /./, and /../
3598         my @path_parts;
3599         foreach my $part (split('/', $path)) {
3600                 # discard '.' and ''
3601                 next if (!$part || $part eq '.');
3602                 # handle '..'
3603                 if ($part eq '..') {
3604                         if (@path_parts) {
3605                                 pop @path_parts;
3606                         } else {
3607                                 # link leads outside repository (outside top dir)
3608                                 return;
3609                         }
3610                 } else {
3611                         push @path_parts, $part;
3612                 }
3613         }
3614         $path = join('/', @path_parts);
3615
3616         return $path;
3617 }
3618
3619 # print tree entry (row of git_tree), but without encompassing <tr> element
3620 sub git_print_tree_entry {
3621         my ($t, $basedir, $hash_base, $have_blame) = @_;
3622
3623         my %base_key = ();
3624         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3625
3626         # The format of a table row is: mode list link.  Where mode is
3627         # the mode of the entry, list is the name of the entry, an href,
3628         # and link is the action links of the entry.
3629
3630         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3631         if (exists $t->{'size'}) {
3632                 print "<td class=\"size\">$t->{'size'}</td>\n";
3633         }
3634         if ($t->{'type'} eq "blob") {
3635                 print "<td class=\"list\">" .
3636                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3637                                                file_name=>"$basedir$t->{'name'}", %base_key),
3638                                 -class => "list"}, esc_path($t->{'name'}));
3639                 if (S_ISLNK(oct $t->{'mode'})) {
3640                         my $link_target = git_get_link_target($t->{'hash'});
3641                         if ($link_target) {
3642                                 my $norm_target = normalize_link_target($link_target, $basedir);
3643                                 if (defined $norm_target) {
3644                                         print " -> " .
3645                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3646                                                                      file_name=>$norm_target),
3647                                                        -title => $norm_target}, esc_path($link_target));
3648                                 } else {
3649                                         print " -> " . esc_path($link_target);
3650                                 }
3651                         }
3652                 }
3653                 print "</td>\n";
3654                 print "<td class=\"link\">";
3655                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3656                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3657                               "blob");
3658                 if ($have_blame) {
3659                         print " | " .
3660                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3661                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3662                                       "blame");
3663                 }
3664                 if (defined $hash_base) {
3665                         print " | " .
3666                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3667                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3668                                       "history");
3669                 }
3670                 print " | " .
3671                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3672                                                file_name=>"$basedir$t->{'name'}")},
3673                                 "raw");
3674                 print "</td>\n";
3675
3676         } elsif ($t->{'type'} eq "tree") {
3677                 print "<td class=\"list\">";
3678                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3679                                              file_name=>"$basedir$t->{'name'}",
3680                                              %base_key)},
3681                               esc_path($t->{'name'}));
3682                 print "</td>\n";
3683                 print "<td class=\"link\">";
3684                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3685                                              file_name=>"$basedir$t->{'name'}",
3686                                              %base_key)},
3687                               "tree");
3688                 if (defined $hash_base) {
3689                         print " | " .
3690                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3691                                                      file_name=>"$basedir$t->{'name'}")},
3692                                       "history");
3693                 }
3694                 print "</td>\n";
3695         } else {
3696                 # unknown object: we can only present history for it
3697                 # (this includes 'commit' object, i.e. submodule support)
3698                 print "<td class=\"list\">" .
3699                       esc_path($t->{'name'}) .
3700                       "</td>\n";
3701                 print "<td class=\"link\">";
3702                 if (defined $hash_base) {
3703                         print $cgi->a({-href => href(action=>"history",
3704                                                      hash_base=>$hash_base,
3705                                                      file_name=>"$basedir$t->{'name'}")},
3706                                       "history");
3707                 }
3708                 print "</td>\n";
3709         }
3710 }
3711
3712 ## ......................................................................
3713 ## functions printing large fragments of HTML
3714
3715 # get pre-image filenames for merge (combined) diff
3716 sub fill_from_file_info {
3717         my ($diff, @parents) = @_;
3718
3719         $diff->{'from_file'} = [ ];
3720         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3721         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3722                 if ($diff->{'status'}[$i] eq 'R' ||
3723                     $diff->{'status'}[$i] eq 'C') {
3724                         $diff->{'from_file'}[$i] =
3725                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3726                 }
3727         }
3728
3729         return $diff;
3730 }
3731
3732 # is current raw difftree line of file deletion
3733 sub is_deleted {
3734         my $diffinfo = shift;
3735
3736         return $diffinfo->{'to_id'} eq ('0' x 40);
3737 }
3738
3739 # does patch correspond to [previous] difftree raw line
3740 # $diffinfo  - hashref of parsed raw diff format
3741 # $patchinfo - hashref of parsed patch diff format
3742 #              (the same keys as in $diffinfo)
3743 sub is_patch_split {
3744         my ($diffinfo, $patchinfo) = @_;
3745
3746         return defined $diffinfo && defined $patchinfo
3747                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3748 }
3749
3750
3751 sub git_difftree_body {
3752         my ($difftree, $hash, @parents) = @_;
3753         my ($parent) = $parents[0];
3754         my $have_blame = gitweb_check_feature('blame');
3755         print "<div class=\"list_head\">\n";
3756         if ($#{$difftree} > 10) {
3757                 print(($#{$difftree} + 1) . " files changed:\n");
3758         }
3759         print "</div>\n";
3760
3761         print "<table class=\"" .
3762               (@parents > 1 ? "combined " : "") .
3763               "diff_tree\">\n";
3764
3765         # header only for combined diff in 'commitdiff' view
3766         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3767         if ($has_header) {
3768                 # table header
3769                 print "<thead><tr>\n" .
3770                        "<th></th><th></th>\n"; # filename, patchN link
3771                 for (my $i = 0; $i < @parents; $i++) {
3772                         my $par = $parents[$i];
3773                         print "<th>" .
3774                               $cgi->a({-href => href(action=>"commitdiff",
3775                                                      hash=>$hash, hash_parent=>$par),
3776                                        -title => 'commitdiff to parent number ' .
3777                                                   ($i+1) . ': ' . substr($par,0,7)},
3778                                       $i+1) .
3779                               "&nbsp;</th>\n";
3780                 }
3781                 print "</tr></thead>\n<tbody>\n";
3782         }
3783
3784         my $alternate = 1;
3785         my $patchno = 0;
3786         foreach my $line (@{$difftree}) {
3787                 my $diff = parsed_difftree_line($line);
3788
3789                 if ($alternate) {
3790                         print "<tr class=\"dark\">\n";
3791                 } else {
3792                         print "<tr class=\"light\">\n";
3793                 }
3794                 $alternate ^= 1;
3795
3796                 if (exists $diff->{'nparents'}) { # combined diff
3797
3798                         fill_from_file_info($diff, @parents)
3799                                 unless exists $diff->{'from_file'};
3800
3801                         if (!is_deleted($diff)) {
3802                                 # file exists in the result (child) commit
3803                                 print "<td>" .
3804                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3805                                                              file_name=>$diff->{'to_file'},
3806                                                              hash_base=>$hash),
3807                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3808                                       "</td>\n";
3809                         } else {
3810                                 print "<td>" .
3811                                       esc_path($diff->{'to_file'}) .
3812                                       "</td>\n";
3813                         }
3814
3815                         if ($action eq 'commitdiff') {
3816                                 # link to patch
3817                                 $patchno++;
3818                                 print "<td class=\"link\">" .
3819                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3820                                       " | " .
3821                                       "</td>\n";
3822                         }
3823
3824                         my $has_history = 0;
3825                         my $not_deleted = 0;
3826                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3827                                 my $hash_parent = $parents[$i];
3828                                 my $from_hash = $diff->{'from_id'}[$i];
3829                                 my $from_path = $diff->{'from_file'}[$i];
3830                                 my $status = $diff->{'status'}[$i];
3831
3832                                 $has_history ||= ($status ne 'A');
3833                                 $not_deleted ||= ($status ne 'D');
3834
3835                                 if ($status eq 'A') {
3836                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3837                                 } elsif ($status eq 'D') {
3838                                         print "<td class=\"link\">" .
3839                                               $cgi->a({-href => href(action=>"blob",
3840                                                                      hash_base=>$hash,
3841                                                                      hash=>$from_hash,
3842                                                                      file_name=>$from_path)},
3843                                                       "blob" . ($i+1)) .
3844                                               " | </td>\n";
3845                                 } else {
3846                                         if ($diff->{'to_id'} eq $from_hash) {
3847                                                 print "<td class=\"link nochange\">";
3848                                         } else {
3849                                                 print "<td class=\"link\">";
3850                                         }
3851                                         print $cgi->a({-href => href(action=>"blobdiff",
3852                                                                      hash=>$diff->{'to_id'},
3853                                                                      hash_parent=>$from_hash,
3854                                                                      hash_base=>$hash,
3855                                                                      hash_parent_base=>$hash_parent,
3856                                                                      file_name=>$diff->{'to_file'},
3857                                                                      file_parent=>$from_path)},
3858                                                       "diff" . ($i+1)) .
3859                                               " | </td>\n";
3860                                 }
3861                         }
3862
3863                         print "<td class=\"link\">";
3864                         if ($not_deleted) {
3865                                 print $cgi->a({-href => href(action=>"blob",
3866                                                              hash=>$diff->{'to_id'},
3867                                                              file_name=>$diff->{'to_file'},
3868                                                              hash_base=>$hash)},
3869                                               "blob");
3870                                 print " | " if ($has_history);
3871                         }
3872                         if ($has_history) {
3873                                 print $cgi->a({-href => href(action=>"history",
3874                                                              file_name=>$diff->{'to_file'},
3875                                                              hash_base=>$hash)},
3876                                               "history");
3877                         }
3878                         print "</td>\n";
3879
3880                         print "</tr>\n";
3881                         next; # instead of 'else' clause, to avoid extra indent
3882                 }
3883                 # else ordinary diff
3884
3885                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3886                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3887                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3888                         $to_mode_oct = oct $diff->{'to_mode'};
3889                         if (S_ISREG($to_mode_oct)) { # only for regular file
3890                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3891                         }
3892                         $to_file_type = file_type($diff->{'to_mode'});
3893                 }
3894                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3895                         $from_mode_oct = oct $diff->{'from_mode'};
3896                         if (S_ISREG($to_mode_oct)) { # only for regular file
3897                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3898                         }
3899                         $from_file_type = file_type($diff->{'from_mode'});
3900                 }
3901
3902                 if ($diff->{'status'} eq "A") { # created
3903                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3904                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3905                         $mode_chng   .= "]</span>";
3906                         print "<td>";
3907                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3908                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3909                                       -class => "list"}, esc_path($diff->{'file'}));
3910                         print "</td>\n";
3911                         print "<td>$mode_chng</td>\n";
3912                         print "<td class=\"link\">";
3913                         if ($action eq 'commitdiff') {
3914                                 # link to patch
3915                                 $patchno++;
3916                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3917                                 print " | ";
3918                         }
3919                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3920                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3921                                       "blob");
3922                         print "</td>\n";
3923
3924                 } elsif ($diff->{'status'} eq "D") { # deleted
3925                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3926                         print "<td>";
3927                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3928                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3929                                        -class => "list"}, esc_path($diff->{'file'}));
3930                         print "</td>\n";
3931                         print "<td>$mode_chng</td>\n";
3932                         print "<td class=\"link\">";
3933                         if ($action eq 'commitdiff') {
3934                                 # link to patch
3935                                 $patchno++;
3936                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3937                                 print " | ";
3938                         }
3939                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3940                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3941                                       "blob") . " | ";
3942                         if ($have_blame) {
3943                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3944                                                              file_name=>$diff->{'file'})},
3945                                               "blame") . " | ";
3946                         }
3947                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3948                                                      file_name=>$diff->{'file'})},
3949                                       "history");
3950                         print "</td>\n";
3951
3952                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3953                         my $mode_chnge = "";
3954                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3955                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3956                                 if ($from_file_type ne $to_file_type) {
3957                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3958                                 }
3959                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3960                                         if ($from_mode_str && $to_mode_str) {
3961                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3962                                         } elsif ($to_mode_str) {
3963                                                 $mode_chnge .= " mode: $to_mode_str";
3964                                         }
3965                                 }
3966                                 $mode_chnge .= "]</span>\n";
3967                         }
3968                         print "<td>";
3969                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3970                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3971                                       -class => "list"}, esc_path($diff->{'file'}));
3972                         print "</td>\n";
3973                         print "<td>$mode_chnge</td>\n";
3974                         print "<td class=\"link\">";
3975                         if ($action eq 'commitdiff') {
3976                                 # link to patch
3977                                 $patchno++;
3978                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3979                                       " | ";
3980                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3981                                 # "commit" view and modified file (not onlu mode changed)
3982                                 print $cgi->a({-href => href(action=>"blobdiff",
3983                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3984                                                              hash_base=>$hash, hash_parent_base=>$parent,
3985                                                              file_name=>$diff->{'file'})},
3986                                               "diff") .
3987                                       " | ";
3988                         }
3989                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3990                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3991                                        "blob") . " | ";
3992                         if ($have_blame) {
3993                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3994                                                              file_name=>$diff->{'file'})},
3995                                               "blame") . " | ";
3996                         }
3997                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3998                                                      file_name=>$diff->{'file'})},
3999                                       "history");
4000                         print "</td>\n";
4001
4002                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4003                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4004                         my $nstatus = $status_name{$diff->{'status'}};
4005                         my $mode_chng = "";
4006                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4007                                 # mode also for directories, so we cannot use $to_mode_str
4008                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4009                         }
4010                         print "<td>" .
4011                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4012                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4013                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4014                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4015                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4016                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4017                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4018                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4019                               "<td class=\"link\">";
4020                         if ($action eq 'commitdiff') {
4021                                 # link to patch
4022                                 $patchno++;
4023                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4024                                       " | ";
4025                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4026                                 # "commit" view and modified file (not only pure rename or copy)
4027                                 print $cgi->a({-href => href(action=>"blobdiff",
4028                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4029                                                              hash_base=>$hash, hash_parent_base=>$parent,
4030                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4031                                               "diff") .
4032                                       " | ";
4033                         }
4034                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4035                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4036                                       "blob") . " | ";
4037                         if ($have_blame) {
4038                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4039                                                              file_name=>$diff->{'to_file'})},
4040                                               "blame") . " | ";
4041                         }
4042                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4043                                                     file_name=>$diff->{'to_file'})},
4044                                       "history");
4045                         print "</td>\n";
4046
4047                 } # we should not encounter Unmerged (U) or Unknown (X) status
4048                 print "</tr>\n";
4049         }
4050         print "</tbody>" if $has_header;
4051         print "</table>\n";
4052 }
4053
4054 sub git_patchset_body {
4055         my ($fd, $difftree, $hash, @hash_parents) = @_;
4056         my ($hash_parent) = $hash_parents[0];
4057
4058         my $is_combined = (@hash_parents > 1);
4059         my $patch_idx = 0;
4060         my $patch_number = 0;
4061         my $patch_line;
4062         my $diffinfo;
4063         my $to_name;
4064         my (%from, %to);
4065
4066         print "<div class=\"patchset\">\n";
4067
4068         # skip to first patch
4069         while ($patch_line = <$fd>) {
4070                 chomp $patch_line;
4071
4072                 last if ($patch_line =~ m/^diff /);
4073         }
4074
4075  PATCH:
4076         while ($patch_line) {
4077
4078                 # parse "git diff" header line
4079                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4080                         # $1 is from_name, which we do not use
4081                         $to_name = unquote($2);
4082                         $to_name =~ s!^b/!!;
4083                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4084                         # $1 is 'cc' or 'combined', which we do not use
4085                         $to_name = unquote($2);
4086                 } else {
4087                         $to_name = undef;
4088                 }
4089
4090                 # check if current patch belong to current raw line
4091                 # and parse raw git-diff line if needed
4092                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4093                         # this is continuation of a split patch
4094                         print "<div class=\"patch cont\">\n";
4095                 } else {
4096                         # advance raw git-diff output if needed
4097                         $patch_idx++ if defined $diffinfo;
4098
4099                         # read and prepare patch information
4100                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4101
4102                         # compact combined diff output can have some patches skipped
4103                         # find which patch (using pathname of result) we are at now;
4104                         if ($is_combined) {
4105                                 while ($to_name ne $diffinfo->{'to_file'}) {
4106                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4107                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4108                                               "</div>\n";  # class="patch"
4109
4110                                         $patch_idx++;
4111                                         $patch_number++;
4112
4113                                         last if $patch_idx > $#$difftree;
4114                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4115                                 }
4116                         }
4117
4118                         # modifies %from, %to hashes
4119                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4120
4121                         # this is first patch for raw difftree line with $patch_idx index
4122                         # we index @$difftree array from 0, but number patches from 1
4123                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4124                 }
4125
4126                 # git diff header
4127                 #assert($patch_line =~ m/^diff /) if DEBUG;
4128                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4129                 $patch_number++;
4130                 # print "git diff" header
4131                 print format_git_diff_header_line($patch_line, $diffinfo,
4132                                                   \%from, \%to);
4133
4134                 # print extended diff header
4135                 print "<div class=\"diff extended_header\">\n";
4136         EXTENDED_HEADER:
4137                 while ($patch_line = <$fd>) {
4138                         chomp $patch_line;
4139
4140                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4141
4142                         print format_extended_diff_header_line($patch_line, $diffinfo,
4143                                                                \%from, \%to);
4144                 }
4145                 print "</div>\n"; # class="diff extended_header"
4146
4147                 # from-file/to-file diff header
4148                 if (! $patch_line) {
4149                         print "</div>\n"; # class="patch"
4150                         last PATCH;
4151                 }
4152                 next PATCH if ($patch_line =~ m/^diff /);
4153                 #assert($patch_line =~ m/^---/) if DEBUG;
4154
4155                 my $last_patch_line = $patch_line;
4156                 $patch_line = <$fd>;
4157                 chomp $patch_line;
4158                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4159
4160                 print format_diff_from_to_header($last_patch_line, $patch_line,
4161                                                  $diffinfo, \%from, \%to,
4162                                                  @hash_parents);
4163
4164                 # the patch itself
4165         LINE:
4166                 while ($patch_line = <$fd>) {
4167                         chomp $patch_line;
4168
4169                         next PATCH if ($patch_line =~ m/^diff /);
4170
4171                         print format_diff_line($patch_line, \%from, \%to);
4172                 }
4173
4174         } continue {
4175                 print "</div>\n"; # class="patch"
4176         }
4177
4178         # for compact combined (--cc) format, with chunk and patch simpliciaction
4179         # patchset might be empty, but there might be unprocessed raw lines
4180         for (++$patch_idx if $patch_number > 0;
4181              $patch_idx < @$difftree;
4182              ++$patch_idx) {
4183                 # read and prepare patch information
4184                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4185
4186                 # generate anchor for "patch" links in difftree / whatchanged part
4187                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4188                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4189                       "</div>\n";  # class="patch"
4190
4191                 $patch_number++;
4192         }
4193
4194         if ($patch_number == 0) {
4195                 if (@hash_parents > 1) {
4196                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4197                 } else {
4198                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4199                 }
4200         }
4201
4202         print "</div>\n"; # class="patchset"
4203 }
4204
4205 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4206
4207 # fills project list info (age, description, owner, forks) for each
4208 # project in the list, removing invalid projects from returned list
4209 # NOTE: modifies $projlist, but does not remove entries from it
4210 sub fill_project_list_info {
4211         my ($projlist, $check_forks) = @_;
4212         my @projects;
4213
4214         my $show_ctags = gitweb_check_feature('ctags');
4215  PROJECT:
4216         foreach my $pr (@$projlist) {
4217                 my (@activity) = git_get_last_activity($pr->{'path'});
4218                 unless (@activity) {
4219                         next PROJECT;
4220                 }
4221                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4222                 if (!defined $pr->{'descr'}) {
4223                         my $descr = git_get_project_description($pr->{'path'}) || "";
4224                         $descr = to_utf8($descr);
4225                         $pr->{'descr_long'} = $descr;
4226                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4227                 }
4228                 if (!defined $pr->{'owner'}) {
4229                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4230                 }
4231                 if ($check_forks) {
4232                         my $pname = $pr->{'path'};
4233                         if (($pname =~ s/\.git$//) &&
4234                             ($pname !~ /\/$/) &&
4235                             (-d "$projectroot/$pname")) {
4236                                 $pr->{'forks'} = "-d $projectroot/$pname";
4237                         } else {
4238                                 $pr->{'forks'} = 0;
4239                         }
4240                 }
4241                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4242                 push @projects, $pr;
4243         }
4244
4245         return @projects;
4246 }
4247
4248 # print 'sort by' <th> element, generating 'sort by $name' replay link
4249 # if that order is not selected
4250 sub print_sort_th {
4251         my ($name, $order, $header) = @_;
4252         $header ||= ucfirst($name);
4253
4254         if ($order eq $name) {
4255                 print "<th>$header</th>\n";
4256         } else {
4257                 print "<th>" .
4258                       $cgi->a({-href => href(-replay=>1, order=>$name),
4259                                -class => "header"}, $header) .
4260                       "</th>\n";
4261         }
4262 }
4263
4264 sub git_project_list_body {
4265         # actually uses global variable $project
4266         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4267
4268         my $check_forks = gitweb_check_feature('forks');
4269         my @projects = fill_project_list_info($projlist, $check_forks);
4270
4271         $order ||= $default_projects_order;
4272         $from = 0 unless defined $from;
4273         $to = $#projects if (!defined $to || $#projects < $to);
4274
4275         my %order_info = (
4276                 project => { key => 'path', type => 'str' },
4277                 descr => { key => 'descr_long', type => 'str' },
4278                 owner => { key => 'owner', type => 'str' },
4279                 age => { key => 'age', type => 'num' }
4280         );
4281         my $oi = $order_info{$order};
4282         if ($oi->{'type'} eq 'str') {
4283                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4284         } else {
4285                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4286         }
4287
4288         my $show_ctags = gitweb_check_feature('ctags');
4289         if ($show_ctags) {
4290                 my %ctags;
4291                 foreach my $p (@projects) {
4292                         foreach my $ct (keys %{$p->{'ctags'}}) {
4293                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4294                         }
4295                 }
4296                 my $cloud = git_populate_project_tagcloud(\%ctags);
4297                 print git_show_project_tagcloud($cloud, 64);
4298         }
4299
4300         print "<table class=\"project_list\">\n";
4301         unless ($no_header) {
4302                 print "<tr>\n";
4303                 if ($check_forks) {
4304                         print "<th></th>\n";
4305                 }
4306                 print_sort_th('project', $order, 'Project');
4307                 print_sort_th('descr', $order, 'Description');
4308                 print_sort_th('owner', $order, 'Owner');
4309                 print_sort_th('age', $order, 'Last Change');
4310                 print "<th></th>\n" . # for links
4311                       "</tr>\n";
4312         }
4313         my $alternate = 1;
4314         my $tagfilter = $cgi->param('by_tag');
4315         for (my $i = $from; $i <= $to; $i++) {
4316                 my $pr = $projects[$i];
4317
4318                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4319                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4320                         and not $pr->{'descr_long'} =~ /$searchtext/;
4321                 # Weed out forks or non-matching entries of search
4322                 if ($check_forks) {
4323                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4324                         $forkbase="^$forkbase" if $forkbase;
4325                         next if not $searchtext and not $tagfilter and $show_ctags
4326                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4327                 }
4328
4329                 if ($alternate) {
4330                         print "<tr class=\"dark\">\n";
4331                 } else {
4332                         print "<tr class=\"light\">\n";
4333                 }
4334                 $alternate ^= 1;
4335                 if ($check_forks) {
4336                         print "<td>";
4337                         if ($pr->{'forks'}) {
4338                                 print "<!-- $pr->{'forks'} -->\n";
4339                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4340                         }
4341                         print "</td>\n";
4342                 }
4343                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4344                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4345                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4346                                         -class => "list", -title => $pr->{'descr_long'}},
4347                                         esc_html($pr->{'descr'})) . "</td>\n" .
4348                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4349                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4350                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4351                       "<td class=\"link\">" .
4352                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4353                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4354                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4355                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4356                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4357                       "</td>\n" .
4358                       "</tr>\n";
4359         }
4360         if (defined $extra) {
4361                 print "<tr>\n";
4362                 if ($check_forks) {
4363                         print "<td></td>\n";
4364                 }
4365                 print "<td colspan=\"5\">$extra</td>\n" .
4366                       "</tr>\n";
4367         }
4368         print "</table>\n";
4369 }
4370
4371 sub git_log_body {
4372         # uses global variable $project
4373         my ($commitlist, $from, $to, $refs, $extra) = @_;
4374
4375         $from = 0 unless defined $from;
4376         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4377
4378         for (my $i = 0; $i <= $to; $i++) {
4379                 my %co = %{$commitlist->[$i]};
4380                 next if !%co;
4381                 my $commit = $co{'id'};
4382                 my $ref = format_ref_marker($refs, $commit);
4383                 my %ad = parse_date($co{'author_epoch'});
4384                 git_print_header_div('commit',
4385                                "<span class=\"age\">$co{'age_string'}</span>" .
4386                                esc_html($co{'title'}) . $ref,
4387                                $commit);
4388                 print "<div class=\"title_text\">\n" .
4389                       "<div class=\"log_link\">\n" .
4390                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4391                       " | " .
4392                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4393                       " | " .
4394                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4395                       "<br/>\n" .
4396                       "</div>\n";
4397                       git_print_authorship(\%co, -tag => 'span');
4398                       print "<br/>\n</div>\n";
4399
4400                 print "<div class=\"log_body\">\n";
4401                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4402                 print "</div>\n";
4403         }
4404         if ($extra) {
4405                 print "<div class=\"page_nav\">\n";
4406                 print "$extra\n";
4407                 print "</div>\n";
4408         }
4409 }
4410
4411 sub git_shortlog_body {
4412         # uses global variable $project
4413         my ($commitlist, $from, $to, $refs, $extra) = @_;
4414
4415         $from = 0 unless defined $from;
4416         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4417
4418         print "<table class=\"shortlog\">\n";
4419         my $alternate = 1;
4420         for (my $i = $from; $i <= $to; $i++) {
4421                 my %co = %{$commitlist->[$i]};
4422                 my $commit = $co{'id'};
4423                 my $ref = format_ref_marker($refs, $commit);
4424                 if ($alternate) {
4425                         print "<tr class=\"dark\">\n";
4426                 } else {
4427                         print "<tr class=\"light\">\n";
4428                 }
4429                 $alternate ^= 1;
4430                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4431                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4432                       format_author_html('td', \%co, 10) . "<td>";
4433                 print format_subject_html($co{'title'}, $co{'title_short'},
4434                                           href(action=>"commit", hash=>$commit), $ref);
4435                 print "</td>\n" .
4436                       "<td class=\"link\">" .
4437                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4438                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4439                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4440                 my $snapshot_links = format_snapshot_links($commit);
4441                 if (defined $snapshot_links) {
4442                         print " | " . $snapshot_links;
4443                 }
4444                 print "</td>\n" .
4445                       "</tr>\n";
4446         }
4447         if (defined $extra) {
4448                 print "<tr>\n" .
4449                       "<td colspan=\"4\">$extra</td>\n" .
4450                       "</tr>\n";
4451         }
4452         print "</table>\n";
4453 }
4454
4455 sub git_history_body {
4456         # Warning: assumes constant type (blob or tree) during history
4457         my ($commitlist, $from, $to, $refs, $extra,
4458             $file_name, $file_hash, $ftype) = @_;
4459
4460         $from = 0 unless defined $from;
4461         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4462
4463         print "<table class=\"history\">\n";
4464         my $alternate = 1;
4465         for (my $i = $from; $i <= $to; $i++) {
4466                 my %co = %{$commitlist->[$i]};
4467                 if (!%co) {
4468                         next;
4469                 }
4470                 my $commit = $co{'id'};
4471
4472                 my $ref = format_ref_marker($refs, $commit);
4473
4474                 if ($alternate) {
4475                         print "<tr class=\"dark\">\n";
4476                 } else {
4477                         print "<tr class=\"light\">\n";
4478                 }
4479                 $alternate ^= 1;
4480                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4481         # shortlog:   format_author_html('td', \%co, 10)
4482                       format_author_html('td', \%co, 15, 3) . "<td>";
4483                 # originally git_history used chop_str($co{'title'}, 50)
4484                 print format_subject_html($co{'title'}, $co{'title_short'},
4485                                           href(action=>"commit", hash=>$commit), $ref);
4486                 print "</td>\n" .
4487                       "<td class=\"link\">" .
4488                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4489                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4490
4491                 if ($ftype eq 'blob') {
4492                         my $blob_current = $file_hash;
4493                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4494                         if (defined $blob_current && defined $blob_parent &&
4495                                         $blob_current ne $blob_parent) {
4496                                 print " | " .
4497                                         $cgi->a({-href => href(action=>"blobdiff",
4498                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4499                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4500                                                                file_name=>$file_name)},
4501                                                 "diff to current");
4502                         }
4503                 }
4504                 print "</td>\n" .
4505                       "</tr>\n";
4506         }
4507         if (defined $extra) {
4508                 print "<tr>\n" .
4509                       "<td colspan=\"4\">$extra</td>\n" .
4510                       "</tr>\n";
4511         }
4512         print "</table>\n";
4513 }
4514
4515 sub git_tags_body {
4516         # uses global variable $project
4517         my ($taglist, $from, $to, $extra) = @_;
4518         $from = 0 unless defined $from;
4519         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4520
4521         print "<table class=\"tags\">\n";
4522         my $alternate = 1;
4523         for (my $i = $from; $i <= $to; $i++) {
4524                 my $entry = $taglist->[$i];
4525                 my %tag = %$entry;
4526                 my $comment = $tag{'subject'};
4527                 my $comment_short;
4528                 if (defined $comment) {
4529                         $comment_short = chop_str($comment, 30, 5);
4530                 }
4531                 if ($alternate) {
4532                         print "<tr class=\"dark\">\n";
4533                 } else {
4534                         print "<tr class=\"light\">\n";
4535                 }
4536                 $alternate ^= 1;
4537                 if (defined $tag{'age'}) {
4538                         print "<td><i>$tag{'age'}</i></td>\n";
4539                 } else {
4540                         print "<td></td>\n";
4541                 }
4542                 print "<td>" .
4543                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4544                                -class => "list name"}, esc_html($tag{'name'})) .
4545                       "</td>\n" .
4546                       "<td>";
4547                 if (defined $comment) {
4548                         print format_subject_html($comment, $comment_short,
4549                                                   href(action=>"tag", hash=>$tag{'id'}));
4550                 }
4551                 print "</td>\n" .
4552                       "<td class=\"selflink\">";
4553                 if ($tag{'type'} eq "tag") {
4554                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4555                 } else {
4556                         print "&nbsp;";
4557                 }
4558                 print "</td>\n" .
4559                       "<td class=\"link\">" . " | " .
4560                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4561                 if ($tag{'reftype'} eq "commit") {
4562                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4563                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4564                 } elsif ($tag{'reftype'} eq "blob") {
4565                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4566                 }
4567                 print "</td>\n" .
4568                       "</tr>";
4569         }
4570         if (defined $extra) {
4571                 print "<tr>\n" .
4572                       "<td colspan=\"5\">$extra</td>\n" .
4573                       "</tr>\n";
4574         }
4575         print "</table>\n";
4576 }
4577
4578 sub git_heads_body {
4579         # uses global variable $project
4580         my ($headlist, $head, $from, $to, $extra) = @_;
4581         $from = 0 unless defined $from;
4582         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4583
4584         print "<table class=\"heads\">\n";
4585         my $alternate = 1;
4586         for (my $i = $from; $i <= $to; $i++) {
4587                 my $entry = $headlist->[$i];
4588                 my %ref = %$entry;
4589                 my $curr = $ref{'id'} eq $head;
4590                 if ($alternate) {
4591                         print "<tr class=\"dark\">\n";
4592                 } else {
4593                         print "<tr class=\"light\">\n";
4594                 }
4595                 $alternate ^= 1;
4596                 print "<td><i>$ref{'age'}</i></td>\n" .
4597                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4598                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4599                                -class => "list name"},esc_html($ref{'name'})) .
4600                       "</td>\n" .
4601                       "<td class=\"link\">" .
4602                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4603                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4604                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4605                       "</td>\n" .
4606                       "</tr>";
4607         }
4608         if (defined $extra) {
4609                 print "<tr>\n" .
4610                       "<td colspan=\"3\">$extra</td>\n" .
4611                       "</tr>\n";
4612         }
4613         print "</table>\n";
4614 }
4615
4616 sub git_search_grep_body {
4617         my ($commitlist, $from, $to, $extra) = @_;
4618         $from = 0 unless defined $from;
4619         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4620
4621         print "<table class=\"commit_search\">\n";
4622         my $alternate = 1;
4623         for (my $i = $from; $i <= $to; $i++) {
4624                 my %co = %{$commitlist->[$i]};
4625                 if (!%co) {
4626                         next;
4627                 }
4628                 my $commit = $co{'id'};
4629                 if ($alternate) {
4630                         print "<tr class=\"dark\">\n";
4631                 } else {
4632                         print "<tr class=\"light\">\n";
4633                 }
4634                 $alternate ^= 1;
4635                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4636                       format_author_html('td', \%co, 15, 5) .
4637                       "<td>" .
4638                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4639                                -class => "list subject"},
4640                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4641                 my $comment = $co{'comment'};
4642                 foreach my $line (@$comment) {
4643                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4644                                 my ($lead, $match, $trail) = ($1, $2, $3);
4645                                 $match = chop_str($match, 70, 5, 'center');
4646                                 my $contextlen = int((80 - length($match))/2);
4647                                 $contextlen = 30 if ($contextlen > 30);
4648                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4649                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4650
4651                                 $lead  = esc_html($lead);
4652                                 $match = esc_html($match);
4653                                 $trail = esc_html($trail);
4654
4655                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4656                         }
4657                 }
4658                 print "</td>\n" .
4659                       "<td class=\"link\">" .
4660                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4661                       " | " .
4662                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4663                       " | " .
4664                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4665                 print "</td>\n" .
4666                       "</tr>\n";
4667         }
4668         if (defined $extra) {
4669                 print "<tr>\n" .
4670                       "<td colspan=\"3\">$extra</td>\n" .
4671                       "</tr>\n";
4672         }
4673         print "</table>\n";
4674 }
4675
4676 ## ======================================================================
4677 ## ======================================================================
4678 ## actions
4679
4680 sub git_project_list {
4681         my $order = $input_params{'order'};
4682         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4683                 die_error(400, "Unknown order parameter");
4684         }
4685
4686         my @list = git_get_projects_list();
4687         if (!@list) {
4688                 die_error(404, "No projects found");
4689         }
4690
4691         git_header_html();
4692         if (-f $home_text) {
4693                 print "<div class=\"index_include\">\n";
4694                 insert_file($home_text);
4695                 print "</div>\n";
4696         }
4697         print $cgi->startform(-method => "get") .
4698               "<p class=\"projsearch\">Search:\n" .
4699               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4700               "</p>" .
4701               $cgi->end_form() . "\n";
4702         git_project_list_body(\@list, $order);
4703         git_footer_html();
4704 }
4705
4706 sub git_forks {
4707         my $order = $input_params{'order'};
4708         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4709                 die_error(400, "Unknown order parameter");
4710         }
4711
4712         my @list = git_get_projects_list($project);
4713         if (!@list) {
4714                 die_error(404, "No forks found");
4715         }
4716
4717         git_header_html();
4718         git_print_page_nav('','');
4719         git_print_header_div('summary', "$project forks");
4720         git_project_list_body(\@list, $order);
4721         git_footer_html();
4722 }
4723
4724 sub git_project_index {
4725         my @projects = git_get_projects_list($project);
4726
4727         print $cgi->header(
4728                 -type => 'text/plain',
4729                 -charset => 'utf-8',
4730                 -content_disposition => 'inline; filename="index.aux"');
4731
4732         foreach my $pr (@projects) {
4733                 if (!exists $pr->{'owner'}) {
4734                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4735                 }
4736
4737                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4738                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4739                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4740                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4741                 $path  =~ s/ /\+/g;
4742                 $owner =~ s/ /\+/g;
4743
4744                 print "$path $owner\n";
4745         }
4746 }
4747
4748 sub git_summary {
4749         my $descr = git_get_project_description($project) || "none";
4750         my %co = parse_commit("HEAD");
4751         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4752         my $head = $co{'id'};
4753
4754         my $owner = git_get_project_owner($project);
4755
4756         my $refs = git_get_references();
4757         # These get_*_list functions return one more to allow us to see if
4758         # there are more ...
4759         my @taglist  = git_get_tags_list(16);
4760         my @headlist = git_get_heads_list(16);
4761         my @forklist;
4762         my $check_forks = gitweb_check_feature('forks');
4763
4764         if ($check_forks) {
4765                 @forklist = git_get_projects_list($project);
4766         }
4767
4768         git_header_html();
4769         git_print_page_nav('summary','', $head);
4770
4771         print "<div class=\"title\">&nbsp;</div>\n";
4772         print "<table class=\"projects_list\">\n" .
4773               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4774               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4775         if (defined $cd{'rfc2822'}) {
4776                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4777         }
4778
4779         # use per project git URL list in $projectroot/$project/cloneurl
4780         # or make project git URL from git base URL and project name
4781         my $url_tag = "URL";
4782         my @url_list = git_get_project_url_list($project);
4783         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4784         foreach my $git_url (@url_list) {
4785                 next unless $git_url;
4786                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4787                 $url_tag = "";
4788         }
4789
4790         # Tag cloud
4791         my $show_ctags = gitweb_check_feature('ctags');
4792         if ($show_ctags) {
4793                 my $ctags = git_get_project_ctags($project);
4794                 my $cloud = git_populate_project_tagcloud($ctags);
4795                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4796                 print "</td>\n<td>" unless %$ctags;
4797                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4798                 print "</td>\n<td>" if %$ctags;
4799                 print git_show_project_tagcloud($cloud, 48);
4800                 print "</td></tr>";
4801         }
4802
4803         print "</table>\n";
4804
4805         # If XSS prevention is on, we don't include README.html.
4806         # TODO: Allow a readme in some safe format.
4807         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4808                 print "<div class=\"title\">readme</div>\n" .
4809                       "<div class=\"readme\">\n";
4810                 insert_file("$projectroot/$project/README.html");
4811                 print "\n</div>\n"; # class="readme"
4812         }
4813
4814         # we need to request one more than 16 (0..15) to check if
4815         # those 16 are all
4816         my @commitlist = $head ? parse_commits($head, 17) : ();
4817         if (@commitlist) {
4818                 git_print_header_div('shortlog');
4819                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4820                                   $#commitlist <=  15 ? undef :
4821                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4822         }
4823
4824         if (@taglist) {
4825                 git_print_header_div('tags');
4826                 git_tags_body(\@taglist, 0, 15,
4827                               $#taglist <=  15 ? undef :
4828                               $cgi->a({-href => href(action=>"tags")}, "..."));
4829         }
4830
4831         if (@headlist) {
4832                 git_print_header_div('heads');
4833                 git_heads_body(\@headlist, $head, 0, 15,
4834                                $#headlist <= 15 ? undef :
4835                                $cgi->a({-href => href(action=>"heads")}, "..."));
4836         }
4837
4838         if (@forklist) {
4839                 git_print_header_div('forks');
4840                 git_project_list_body(\@forklist, 'age', 0, 15,
4841                                       $#forklist <= 15 ? undef :
4842                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4843                                       'no_header');
4844         }
4845
4846         git_footer_html();
4847 }
4848
4849 sub git_tag {
4850         my $head = git_get_head_hash($project);
4851         git_header_html();
4852         git_print_page_nav('','', $head,undef,$head);
4853         my %tag = parse_tag($hash);
4854
4855         if (! %tag) {
4856                 die_error(404, "Unknown tag object");
4857         }
4858
4859         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4860         print "<div class=\"title_text\">\n" .
4861               "<table class=\"object_header\">\n" .
4862               "<tr>\n" .
4863               "<td>object</td>\n" .
4864               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4865                                $tag{'object'}) . "</td>\n" .
4866               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4867                                               $tag{'type'}) . "</td>\n" .
4868               "</tr>\n";
4869         if (defined($tag{'author'})) {
4870                 git_print_authorship_rows(\%tag, 'author');
4871         }
4872         print "</table>\n\n" .
4873               "</div>\n";
4874         print "<div class=\"page_body\">";
4875         my $comment = $tag{'comment'};
4876         foreach my $line (@$comment) {
4877                 chomp $line;
4878                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4879         }
4880         print "</div>\n";
4881         git_footer_html();
4882 }
4883
4884 sub git_blame {
4885         # permissions
4886         gitweb_check_feature('blame')
4887                 or die_error(403, "Blame view not allowed");
4888
4889         # error checking
4890         die_error(400, "No file name given") unless $file_name;
4891         $hash_base ||= git_get_head_hash($project);
4892         die_error(404, "Couldn't find base commit") unless $hash_base;
4893         my %co = parse_commit($hash_base)
4894                 or die_error(404, "Commit not found");
4895         my $ftype = "blob";
4896         if (!defined $hash) {
4897                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4898                         or die_error(404, "Error looking up file");
4899         } else {
4900                 $ftype = git_get_type($hash);
4901                 if ($ftype !~ "blob") {
4902                         die_error(400, "Object is not a blob");
4903                 }
4904         }
4905
4906         # run git-blame --porcelain
4907         open my $fd, "-|", git_cmd(), "blame", '-p',
4908                 $hash_base, '--', $file_name
4909                 or die_error(500, "Open git-blame failed");
4910
4911         # page header
4912         git_header_html();
4913         my $formats_nav =
4914                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4915                         "blob") .
4916                 " | " .
4917                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4918                         "history") .
4919                 " | " .
4920                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4921                         "HEAD");
4922         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4923         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4924         git_print_page_path($file_name, $ftype, $hash_base);
4925
4926         # page body
4927         my @rev_color = qw(light dark);
4928         my $num_colors = scalar(@rev_color);
4929         my $current_color = 0;
4930         my %metainfo = ();
4931
4932         print <<HTML;
4933 <div class="page_body">
4934 <table class="blame">
4935 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4936 HTML
4937  LINE:
4938         while (my $line = <$fd>) {
4939                 chomp $line;
4940                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4941                 # no <lines in group> for subsequent lines in group of lines
4942                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4943                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4944                 if (!exists $metainfo{$full_rev}) {
4945                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4946                 }
4947                 my $meta = $metainfo{$full_rev};
4948                 my $data;
4949                 while ($data = <$fd>) {
4950                         chomp $data;
4951                         last if ($data =~ s/^\t//); # contents of line
4952                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4953                                 $meta->{$1} = $2 unless exists $meta->{$1};
4954                         }
4955                         if ($data =~ /^previous /) {
4956                                 $meta->{'nprevious'}++;
4957                         }
4958                 }
4959                 my $short_rev = substr($full_rev, 0, 8);
4960                 my $author = $meta->{'author'};
4961                 my %date =
4962                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4963                 my $date = $date{'iso-tz'};
4964                 if ($group_size) {
4965                         $current_color = ($current_color + 1) % $num_colors;
4966                 }
4967                 my $tr_class = $rev_color[$current_color];
4968                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4969                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4970                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4971                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4972                 if ($group_size) {
4973                         print "<td class=\"sha1\"";
4974                         print " title=\"". esc_html($author) . ", $date\"";
4975                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4976                         print ">";
4977                         print $cgi->a({-href => href(action=>"commit",
4978                                                      hash=>$full_rev,
4979                                                      file_name=>$file_name)},
4980                                       esc_html($short_rev));
4981                         if ($group_size >= 2) {
4982                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4983                                 if (@author_initials) {
4984                                         print "<br />" .
4985                                               esc_html(join('', @author_initials));
4986                                         #           or join('.', ...)
4987                                 }
4988                         }
4989                         print "</td>\n";
4990                 }
4991                 # 'previous' <sha1 of parent commit> <filename at commit>
4992                 if (exists $meta->{'previous'} &&
4993                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4994                         $meta->{'parent'} = $1;
4995                         $meta->{'file_parent'} = unquote($2);
4996                 }
4997                 my $linenr_commit =
4998                         exists($meta->{'parent'}) ?
4999                         $meta->{'parent'} : $full_rev;
5000                 my $linenr_filename =
5001                         exists($meta->{'file_parent'}) ?
5002                         $meta->{'file_parent'} : unquote($meta->{'filename'});
5003                 my $blamed = href(action => 'blame',
5004                                   file_name => $linenr_filename,
5005                                   hash_base => $linenr_commit);
5006                 print "<td class=\"linenr\">";
5007                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
5008                                 -class => "linenr" },
5009                               esc_html($lineno));
5010                 print "</td>";
5011                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5012                 print "</tr>\n";
5013         }
5014         print "</table>\n";
5015         print "</div>";
5016         close $fd
5017                 or print "Reading blob failed\n";
5018
5019         # page footer
5020         git_footer_html();
5021 }
5022
5023 sub git_tags {
5024         my $head = git_get_head_hash($project);
5025         git_header_html();
5026         git_print_page_nav('','', $head,undef,$head);
5027         git_print_header_div('summary', $project);
5028
5029         my @tagslist = git_get_tags_list();
5030         if (@tagslist) {
5031                 git_tags_body(\@tagslist);
5032         }
5033         git_footer_html();
5034 }
5035
5036 sub git_heads {
5037         my $head = git_get_head_hash($project);
5038         git_header_html();
5039         git_print_page_nav('','', $head,undef,$head);
5040         git_print_header_div('summary', $project);
5041
5042         my @headslist = git_get_heads_list();
5043         if (@headslist) {
5044                 git_heads_body(\@headslist, $head);
5045         }
5046         git_footer_html();
5047 }
5048
5049 sub git_blob_plain {
5050         my $type = shift;
5051         my $expires;
5052
5053         if (!defined $hash) {
5054                 if (defined $file_name) {
5055                         my $base = $hash_base || git_get_head_hash($project);
5056                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5057                                 or die_error(404, "Cannot find file");
5058                 } else {
5059                         die_error(400, "No file name defined");
5060                 }
5061         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5062                 # blobs defined by non-textual hash id's can be cached
5063                 $expires = "+1d";
5064         }
5065
5066         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5067                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5068
5069         # content-type (can include charset)
5070         $type = blob_contenttype($fd, $file_name, $type);
5071
5072         # "save as" filename, even when no $file_name is given
5073         my $save_as = "$hash";
5074         if (defined $file_name) {
5075                 $save_as = $file_name;
5076         } elsif ($type =~ m/^text\//) {
5077                 $save_as .= '.txt';
5078         }
5079
5080         # With XSS prevention on, blobs of all types except a few known safe
5081         # ones are served with "Content-Disposition: attachment" to make sure
5082         # they don't run in our security domain.  For certain image types,
5083         # blob view writes an <img> tag referring to blob_plain view, and we
5084         # want to be sure not to break that by serving the image as an
5085         # attachment (though Firefox 3 doesn't seem to care).
5086         my $sandbox = $prevent_xss &&
5087                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5088
5089         print $cgi->header(
5090                 -type => $type,
5091                 -expires => $expires,
5092                 -content_disposition =>
5093                         ($sandbox ? 'attachment' : 'inline')
5094                         . '; filename="' . $save_as . '"');
5095         local $/ = undef;
5096         binmode STDOUT, ':raw';
5097         print <$fd>;
5098         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5099         close $fd;
5100 }
5101
5102 sub git_blob {
5103         my $expires;
5104
5105         if (!defined $hash) {
5106                 if (defined $file_name) {
5107                         my $base = $hash_base || git_get_head_hash($project);
5108                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5109                                 or die_error(404, "Cannot find file");
5110                 } else {
5111                         die_error(400, "No file name defined");
5112                 }
5113         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5114                 # blobs defined by non-textual hash id's can be cached
5115                 $expires = "+1d";
5116         }
5117
5118         my $have_blame = gitweb_check_feature('blame');
5119         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5120                 or die_error(500, "Couldn't cat $file_name, $hash");
5121         my $mimetype = blob_mimetype($fd, $file_name);
5122         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5123                 close $fd;
5124                 return git_blob_plain($mimetype);
5125         }
5126         # we can have blame only for text/* mimetype
5127         $have_blame &&= ($mimetype =~ m!^text/!);
5128
5129         git_header_html(undef, $expires);
5130         my $formats_nav = '';
5131         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5132                 if (defined $file_name) {
5133                         if ($have_blame) {
5134                                 $formats_nav .=
5135                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5136                                                 "blame") .
5137                                         " | ";
5138                         }
5139                         $formats_nav .=
5140                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5141                                         "history") .
5142                                 " | " .
5143                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5144                                         "raw") .
5145                                 " | " .
5146                                 $cgi->a({-href => href(action=>"blob",
5147                                                        hash_base=>"HEAD", file_name=>$file_name)},
5148                                         "HEAD");
5149                 } else {
5150                         $formats_nav .=
5151                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5152                                         "raw");
5153                 }
5154                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5155                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5156         } else {
5157                 print "<div class=\"page_nav\">\n" .
5158                       "<br/><br/></div>\n" .
5159                       "<div class=\"title\">$hash</div>\n";
5160         }
5161         git_print_page_path($file_name, "blob", $hash_base);
5162         print "<div class=\"page_body\">\n";
5163         if ($mimetype =~ m!^image/!) {
5164                 print qq!<img type="$mimetype"!;
5165                 if ($file_name) {
5166                         print qq! alt="$file_name" title="$file_name"!;
5167                 }
5168                 print qq! src="! .
5169                       href(action=>"blob_plain", hash=>$hash,
5170                            hash_base=>$hash_base, file_name=>$file_name) .
5171                       qq!" />\n!;
5172         } else {
5173                 my $nr;
5174                 while (my $line = <$fd>) {
5175                         chomp $line;
5176                         $nr++;
5177                         $line = untabify($line);
5178                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5179                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5180                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5181                 }
5182         }
5183         close $fd
5184                 or print "Reading blob failed.\n";
5185         print "</div>";
5186         git_footer_html();
5187 }
5188
5189 sub git_tree {
5190         if (!defined $hash_base) {
5191                 $hash_base = "HEAD";
5192         }
5193         if (!defined $hash) {
5194                 if (defined $file_name) {
5195                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5196                 } else {
5197                         $hash = $hash_base;
5198                 }
5199         }
5200         die_error(404, "No such tree") unless defined($hash);
5201
5202         my $show_sizes = gitweb_check_feature('show-sizes');
5203         my $have_blame = gitweb_check_feature('blame');
5204
5205         my @entries = ();
5206         {
5207                 local $/ = "\0";
5208                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5209                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5210                         or die_error(500, "Open git-ls-tree failed");
5211                 @entries = map { chomp; $_ } <$fd>;
5212                 close $fd
5213                         or die_error(404, "Reading tree failed");
5214         }
5215
5216         my $refs = git_get_references();
5217         my $ref = format_ref_marker($refs, $hash_base);
5218         git_header_html();
5219         my $basedir = '';
5220         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5221                 my @views_nav = ();
5222                 if (defined $file_name) {
5223                         push @views_nav,
5224                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5225                                         "history"),
5226                                 $cgi->a({-href => href(action=>"tree",
5227                                                        hash_base=>"HEAD", file_name=>$file_name)},
5228                                         "HEAD"),
5229                 }
5230                 my $snapshot_links = format_snapshot_links($hash);
5231                 if (defined $snapshot_links) {
5232                         # FIXME: Should be available when we have no hash base as well.
5233                         push @views_nav, $snapshot_links;
5234                 }
5235                 git_print_page_nav('tree','', $hash_base, undef, undef,
5236                                    join(' | ', @views_nav));
5237                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5238         } else {
5239                 undef $hash_base;
5240                 print "<div class=\"page_nav\">\n";
5241                 print "<br/><br/></div>\n";
5242                 print "<div class=\"title\">$hash</div>\n";
5243         }
5244         if (defined $file_name) {
5245                 $basedir = $file_name;
5246                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5247                         $basedir .= '/';
5248                 }
5249                 git_print_page_path($file_name, 'tree', $hash_base);
5250         }
5251         print "<div class=\"page_body\">\n";
5252         print "<table class=\"tree\">\n";
5253         my $alternate = 1;
5254         # '..' (top directory) link if possible
5255         if (defined $hash_base &&
5256             defined $file_name && $file_name =~ m![^/]+$!) {
5257                 if ($alternate) {
5258                         print "<tr class=\"dark\">\n";
5259                 } else {
5260                         print "<tr class=\"light\">\n";
5261                 }
5262                 $alternate ^= 1;
5263
5264                 my $up = $file_name;
5265                 $up =~ s!/?[^/]+$!!;
5266                 undef $up unless $up;
5267                 # based on git_print_tree_entry
5268                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5269                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5270                 print '<td class="list">';
5271                 print $cgi->a({-href => href(action=>"tree",
5272                                              hash_base=>$hash_base,
5273                                              file_name=>$up)},
5274                               "..");
5275                 print "</td>\n";
5276                 print "<td class=\"link\"></td>\n";
5277
5278                 print "</tr>\n";
5279         }
5280         foreach my $line (@entries) {
5281                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5282
5283                 if ($alternate) {
5284                         print "<tr class=\"dark\">\n";
5285                 } else {
5286                         print "<tr class=\"light\">\n";
5287                 }
5288                 $alternate ^= 1;
5289
5290                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5291
5292                 print "</tr>\n";
5293         }
5294         print "</table>\n" .
5295               "</div>";
5296         git_footer_html();
5297 }
5298
5299 sub snapshot_name {
5300         my ($project, $hash) = @_;
5301
5302         # path/to/project.git  -> project
5303         # path/to/project/.git -> project
5304         my $name = to_utf8($project);
5305         $name =~ s,([^/])/*\.git$,$1,;
5306         $name = basename($name);
5307         # sanitize name
5308         $name =~ s/[[:cntrl:]]/?/g;
5309
5310         my $ver = $hash;
5311         if ($hash =~ /^[0-9a-fA-F]+$/) {
5312                 # shorten SHA-1 hash
5313                 my $full_hash = git_get_full_hash($project, $hash);
5314                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5315                         $ver = git_get_short_hash($project, $hash);
5316                 }
5317         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5318                 # tags don't need shortened SHA-1 hash
5319                 $ver = $1;
5320         } else {
5321                 # branches and other need shortened SHA-1 hash
5322                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5323                         $ver = $1;
5324                 }
5325                 $ver .= '-' . git_get_short_hash($project, $hash);
5326         }
5327         # in case of hierarchical branch names
5328         $ver =~ s!/!.!g;
5329
5330         # name = project-version_string
5331         $name = "$name-$ver";
5332
5333         return wantarray ? ($name, $name) : $name;
5334 }
5335
5336 sub git_snapshot {
5337         my $format = $input_params{'snapshot_format'};
5338         if (!@snapshot_fmts) {
5339                 die_error(403, "Snapshots not allowed");
5340         }
5341         # default to first supported snapshot format
5342         $format ||= $snapshot_fmts[0];
5343         if ($format !~ m/^[a-z0-9]+$/) {
5344                 die_error(400, "Invalid snapshot format parameter");
5345         } elsif (!exists($known_snapshot_formats{$format})) {
5346                 die_error(400, "Unknown snapshot format");
5347         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5348                 die_error(403, "Snapshot format not allowed");
5349         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5350                 die_error(403, "Unsupported snapshot format");
5351         }
5352
5353         my $type = git_get_type("$hash^{}");
5354         if (!$type) {
5355                 die_error(404, 'Object does not exist');
5356         }  elsif ($type eq 'blob') {
5357                 die_error(400, 'Object is not a tree-ish');
5358         }
5359
5360         my ($name, $prefix) = snapshot_name($project, $hash);
5361         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5362         my $cmd = quote_command(
5363                 git_cmd(), 'archive',
5364                 "--format=$known_snapshot_formats{$format}{'format'}",
5365                 "--prefix=$prefix/", $hash);
5366         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5367                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5368         }
5369
5370         $filename =~ s/(["\\])/\\$1/g;
5371         print $cgi->header(
5372                 -type => $known_snapshot_formats{$format}{'type'},
5373                 -content_disposition => 'inline; filename="' . $filename . '"',
5374                 -status => '200 OK');
5375
5376         open my $fd, "-|", $cmd
5377                 or die_error(500, "Execute git-archive failed");
5378         binmode STDOUT, ':raw';
5379         print <$fd>;
5380         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5381         close $fd;
5382 }
5383
5384 sub git_log_generic {
5385         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5386
5387         my $head = git_get_head_hash($project);
5388         if (!defined $base) {
5389                 $base = $head;
5390         }
5391         if (!defined $page) {
5392                 $page = 0;
5393         }
5394         my $refs = git_get_references();
5395
5396         my $commit_hash = $base;
5397         if (defined $parent) {
5398                 $commit_hash = "$parent..$base";
5399         }
5400         my @commitlist =
5401                 parse_commits($commit_hash, 101, (100 * $page),
5402                               defined $file_name ? ($file_name, "--full-history") : ());
5403
5404         my $ftype;
5405         if (!defined $file_hash && defined $file_name) {
5406                 # some commits could have deleted file in question,
5407                 # and not have it in tree, but one of them has to have it
5408                 for (my $i = 0; $i < @commitlist; $i++) {
5409                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5410                         last if defined $file_hash;
5411                 }
5412         }
5413         if (defined $file_hash) {
5414                 $ftype = git_get_type($file_hash);
5415         }
5416         if (defined $file_name && !defined $ftype) {
5417                 die_error(500, "Unknown type of object");
5418         }
5419         my %co;
5420         if (defined $file_name) {
5421                 %co = parse_commit($base)
5422                         or die_error(404, "Unknown commit object");
5423         }
5424
5425
5426         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5427         my $next_link = '';
5428         if ($#commitlist >= 100) {
5429                 $next_link =
5430                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5431                                  -accesskey => "n", -title => "Alt-n"}, "next");
5432         }
5433         my $patch_max = gitweb_get_feature('patches');
5434         if ($patch_max && !defined $file_name) {
5435                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5436                         $paging_nav .= " &sdot; " .
5437                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5438                                         "patches");
5439                 }
5440         }
5441
5442         git_header_html();
5443         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5444         if (defined $file_name) {
5445                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5446         } else {
5447                 git_print_header_div('summary', $project)
5448         }
5449         git_print_page_path($file_name, $ftype, $hash_base)
5450                 if (defined $file_name);
5451
5452         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5453                      $file_name, $file_hash, $ftype);
5454
5455         git_footer_html();
5456 }
5457
5458 sub git_log {
5459         git_log_generic('log', \&git_log_body,
5460                         $hash, $hash_parent);
5461 }
5462
5463 sub git_commit {
5464         $hash ||= $hash_base || "HEAD";
5465         my %co = parse_commit($hash)
5466             or die_error(404, "Unknown commit object");
5467
5468         my $parent  = $co{'parent'};
5469         my $parents = $co{'parents'}; # listref
5470
5471         # we need to prepare $formats_nav before any parameter munging
5472         my $formats_nav;
5473         if (!defined $parent) {
5474                 # --root commitdiff
5475                 $formats_nav .= '(initial)';
5476         } elsif (@$parents == 1) {
5477                 # single parent commit
5478                 $formats_nav .=
5479                         '(parent: ' .
5480                         $cgi->a({-href => href(action=>"commit",
5481                                                hash=>$parent)},
5482                                 esc_html(substr($parent, 0, 7))) .
5483                         ')';
5484         } else {
5485                 # merge commit
5486                 $formats_nav .=
5487                         '(merge: ' .
5488                         join(' ', map {
5489                                 $cgi->a({-href => href(action=>"commit",
5490                                                        hash=>$_)},
5491                                         esc_html(substr($_, 0, 7)));
5492                         } @$parents ) .
5493                         ')';
5494         }
5495         if (gitweb_check_feature('patches') && @$parents <= 1) {
5496                 $formats_nav .= " | " .
5497                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5498                                 "patch");
5499         }
5500
5501         if (!defined $parent) {
5502                 $parent = "--root";
5503         }
5504         my @difftree;
5505         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5506                 @diff_opts,
5507                 (@$parents <= 1 ? $parent : '-c'),
5508                 $hash, "--"
5509                 or die_error(500, "Open git-diff-tree failed");
5510         @difftree = map { chomp; $_ } <$fd>;
5511         close $fd or die_error(404, "Reading git-diff-tree failed");
5512
5513         # non-textual hash id's can be cached
5514         my $expires;
5515         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5516                 $expires = "+1d";
5517         }
5518         my $refs = git_get_references();
5519         my $ref = format_ref_marker($refs, $co{'id'});
5520
5521         git_header_html(undef, $expires);
5522         git_print_page_nav('commit', '',
5523                            $hash, $co{'tree'}, $hash,
5524                            $formats_nav);
5525
5526         if (defined $co{'parent'}) {
5527                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5528         } else {
5529                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5530         }
5531         print "<div class=\"title_text\">\n" .
5532               "<table class=\"object_header\">\n";
5533         git_print_authorship_rows(\%co);
5534         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5535         print "<tr>" .
5536               "<td>tree</td>" .
5537               "<td class=\"sha1\">" .
5538               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5539                        class => "list"}, $co{'tree'}) .
5540               "</td>" .
5541               "<td class=\"link\">" .
5542               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5543                       "tree");
5544         my $snapshot_links = format_snapshot_links($hash);
5545         if (defined $snapshot_links) {
5546                 print " | " . $snapshot_links;
5547         }
5548         print "</td>" .
5549               "</tr>\n";
5550
5551         foreach my $par (@$parents) {
5552                 print "<tr>" .
5553                       "<td>parent</td>" .
5554                       "<td class=\"sha1\">" .
5555                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5556                                class => "list"}, $par) .
5557                       "</td>" .
5558                       "<td class=\"link\">" .
5559                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5560                       " | " .
5561                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5562                       "</td>" .
5563                       "</tr>\n";
5564         }
5565         print "</table>".
5566               "</div>\n";
5567
5568         print "<div class=\"page_body\">\n";
5569         git_print_log($co{'comment'});
5570         print "</div>\n";
5571
5572         git_difftree_body(\@difftree, $hash, @$parents);
5573
5574         git_footer_html();
5575 }
5576
5577 sub git_object {
5578         # object is defined by:
5579         # - hash or hash_base alone
5580         # - hash_base and file_name
5581         my $type;
5582
5583         # - hash or hash_base alone
5584         if ($hash || ($hash_base && !defined $file_name)) {
5585                 my $object_id = $hash || $hash_base;
5586
5587                 open my $fd, "-|", quote_command(
5588                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5589                         or die_error(404, "Object does not exist");
5590                 $type = <$fd>;
5591                 chomp $type;
5592                 close $fd
5593                         or die_error(404, "Object does not exist");
5594
5595         # - hash_base and file_name
5596         } elsif ($hash_base && defined $file_name) {
5597                 $file_name =~ s,/+$,,;
5598
5599                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5600                         or die_error(404, "Base object does not exist");
5601
5602                 # here errors should not hapen
5603                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5604                         or die_error(500, "Open git-ls-tree failed");
5605                 my $line = <$fd>;
5606                 close $fd;
5607
5608                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5609                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5610                         die_error(404, "File or directory for given base does not exist");
5611                 }
5612                 $type = $2;
5613                 $hash = $3;
5614         } else {
5615                 die_error(400, "Not enough information to find object");
5616         }
5617
5618         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5619                                           hash=>$hash, hash_base=>$hash_base,
5620                                           file_name=>$file_name),
5621                              -status => '302 Found');
5622 }
5623
5624 sub git_blobdiff {
5625         my $format = shift || 'html';
5626
5627         my $fd;
5628         my @difftree;
5629         my %diffinfo;
5630         my $expires;
5631
5632         # preparing $fd and %diffinfo for git_patchset_body
5633         # new style URI
5634         if (defined $hash_base && defined $hash_parent_base) {
5635                 if (defined $file_name) {
5636                         # read raw output
5637                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5638                                 $hash_parent_base, $hash_base,
5639                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5640                                 or die_error(500, "Open git-diff-tree failed");
5641                         @difftree = map { chomp; $_ } <$fd>;
5642                         close $fd
5643                                 or die_error(404, "Reading git-diff-tree failed");
5644                         @difftree
5645                                 or die_error(404, "Blob diff not found");
5646
5647                 } elsif (defined $hash &&
5648                          $hash =~ /[0-9a-fA-F]{40}/) {
5649                         # try to find filename from $hash
5650
5651                         # read filtered raw output
5652                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5653                                 $hash_parent_base, $hash_base, "--"
5654                                 or die_error(500, "Open git-diff-tree failed");
5655                         @difftree =
5656                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5657                                 # $hash == to_id
5658                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5659                                 map { chomp; $_ } <$fd>;
5660                         close $fd
5661                                 or die_error(404, "Reading git-diff-tree failed");
5662                         @difftree
5663                                 or die_error(404, "Blob diff not found");
5664
5665                 } else {
5666                         die_error(400, "Missing one of the blob diff parameters");
5667                 }
5668
5669                 if (@difftree > 1) {
5670                         die_error(400, "Ambiguous blob diff specification");
5671                 }
5672
5673                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5674                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5675                 $file_name   ||= $diffinfo{'to_file'};
5676
5677                 $hash_parent ||= $diffinfo{'from_id'};
5678                 $hash        ||= $diffinfo{'to_id'};
5679
5680                 # non-textual hash id's can be cached
5681                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5682                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5683                         $expires = '+1d';
5684                 }
5685
5686                 # open patch output
5687                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5688                         '-p', ($format eq 'html' ? "--full-index" : ()),
5689                         $hash_parent_base, $hash_base,
5690                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5691                         or die_error(500, "Open git-diff-tree failed");
5692         }
5693
5694         # old/legacy style URI -- not generated anymore since 1.4.3.
5695         if (!%diffinfo) {
5696                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5697         }
5698
5699         # header
5700         if ($format eq 'html') {
5701                 my $formats_nav =
5702                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5703                                 "raw");
5704                 git_header_html(undef, $expires);
5705                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5706                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5707                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5708                 } else {
5709                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5710                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5711                 }
5712                 if (defined $file_name) {
5713                         git_print_page_path($file_name, "blob", $hash_base);
5714                 } else {
5715                         print "<div class=\"page_path\"></div>\n";
5716                 }
5717
5718         } elsif ($format eq 'plain') {
5719                 print $cgi->header(
5720                         -type => 'text/plain',
5721                         -charset => 'utf-8',
5722                         -expires => $expires,
5723                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5724
5725                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5726
5727         } else {
5728                 die_error(400, "Unknown blobdiff format");
5729         }
5730
5731         # patch
5732         if ($format eq 'html') {
5733                 print "<div class=\"page_body\">\n";
5734
5735                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5736                 close $fd;
5737
5738                 print "</div>\n"; # class="page_body"
5739                 git_footer_html();
5740
5741         } else {
5742                 while (my $line = <$fd>) {
5743                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5744                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5745
5746                         print $line;
5747
5748                         last if $line =~ m!^\+\+\+!;
5749                 }
5750                 local $/ = undef;
5751                 print <$fd>;
5752                 close $fd;
5753         }
5754 }
5755
5756 sub git_blobdiff_plain {
5757         git_blobdiff('plain');
5758 }
5759
5760 sub git_commitdiff {
5761         my %params = @_;
5762         my $format = $params{-format} || 'html';
5763
5764         my ($patch_max) = gitweb_get_feature('patches');
5765         if ($format eq 'patch') {
5766                 die_error(403, "Patch view not allowed") unless $patch_max;
5767         }
5768
5769         $hash ||= $hash_base || "HEAD";
5770         my %co = parse_commit($hash)
5771             or die_error(404, "Unknown commit object");
5772
5773         # choose format for commitdiff for merge
5774         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5775                 $hash_parent = '--cc';
5776         }
5777         # we need to prepare $formats_nav before almost any parameter munging
5778         my $formats_nav;
5779         if ($format eq 'html') {
5780                 $formats_nav =
5781                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5782                                 "raw");
5783                 if ($patch_max && @{$co{'parents'}} <= 1) {
5784                         $formats_nav .= " | " .
5785                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5786                                         "patch");
5787                 }
5788
5789                 if (defined $hash_parent &&
5790                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5791                         # commitdiff with two commits given
5792                         my $hash_parent_short = $hash_parent;
5793                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5794                                 $hash_parent_short = substr($hash_parent, 0, 7);
5795                         }
5796                         $formats_nav .=
5797                                 ' (from';
5798                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5799                                 if ($co{'parents'}[$i] eq $hash_parent) {
5800                                         $formats_nav .= ' parent ' . ($i+1);
5801                                         last;
5802                                 }
5803                         }
5804                         $formats_nav .= ': ' .
5805                                 $cgi->a({-href => href(action=>"commitdiff",
5806                                                        hash=>$hash_parent)},
5807                                         esc_html($hash_parent_short)) .
5808                                 ')';
5809                 } elsif (!$co{'parent'}) {
5810                         # --root commitdiff
5811                         $formats_nav .= ' (initial)';
5812                 } elsif (scalar @{$co{'parents'}} == 1) {
5813                         # single parent commit
5814                         $formats_nav .=
5815                                 ' (parent: ' .
5816                                 $cgi->a({-href => href(action=>"commitdiff",
5817                                                        hash=>$co{'parent'})},
5818                                         esc_html(substr($co{'parent'}, 0, 7))) .
5819                                 ')';
5820                 } else {
5821                         # merge commit
5822                         if ($hash_parent eq '--cc') {
5823                                 $formats_nav .= ' | ' .
5824                                         $cgi->a({-href => href(action=>"commitdiff",
5825                                                                hash=>$hash, hash_parent=>'-c')},
5826                                                 'combined');
5827                         } else { # $hash_parent eq '-c'
5828                                 $formats_nav .= ' | ' .
5829                                         $cgi->a({-href => href(action=>"commitdiff",
5830                                                                hash=>$hash, hash_parent=>'--cc')},
5831                                                 'compact');
5832                         }
5833                         $formats_nav .=
5834                                 ' (merge: ' .
5835                                 join(' ', map {
5836                                         $cgi->a({-href => href(action=>"commitdiff",
5837                                                                hash=>$_)},
5838                                                 esc_html(substr($_, 0, 7)));
5839                                 } @{$co{'parents'}} ) .
5840                                 ')';
5841                 }
5842         }
5843
5844         my $hash_parent_param = $hash_parent;
5845         if (!defined $hash_parent_param) {
5846                 # --cc for multiple parents, --root for parentless
5847                 $hash_parent_param =
5848                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5849         }
5850
5851         # read commitdiff
5852         my $fd;
5853         my @difftree;
5854         if ($format eq 'html') {
5855                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5856                         "--no-commit-id", "--patch-with-raw", "--full-index",
5857                         $hash_parent_param, $hash, "--"
5858                         or die_error(500, "Open git-diff-tree failed");
5859
5860                 while (my $line = <$fd>) {
5861                         chomp $line;
5862                         # empty line ends raw part of diff-tree output
5863                         last unless $line;
5864                         push @difftree, scalar parse_difftree_raw_line($line);
5865                 }
5866
5867         } elsif ($format eq 'plain') {
5868                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5869                         '-p', $hash_parent_param, $hash, "--"
5870                         or die_error(500, "Open git-diff-tree failed");
5871         } elsif ($format eq 'patch') {
5872                 # For commit ranges, we limit the output to the number of
5873                 # patches specified in the 'patches' feature.
5874                 # For single commits, we limit the output to a single patch,
5875                 # diverging from the git-format-patch default.
5876                 my @commit_spec = ();
5877                 if ($hash_parent) {
5878                         if ($patch_max > 0) {
5879                                 push @commit_spec, "-$patch_max";
5880                         }
5881                         push @commit_spec, '-n', "$hash_parent..$hash";
5882                 } else {
5883                         if ($params{-single}) {
5884                                 push @commit_spec, '-1';
5885                         } else {
5886                                 if ($patch_max > 0) {
5887                                         push @commit_spec, "-$patch_max";
5888                                 }
5889                                 push @commit_spec, "-n";
5890                         }
5891                         push @commit_spec, '--root', $hash;
5892                 }
5893                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5894                         '--stdout', @commit_spec
5895                         or die_error(500, "Open git-format-patch failed");
5896         } else {
5897                 die_error(400, "Unknown commitdiff format");
5898         }
5899
5900         # non-textual hash id's can be cached
5901         my $expires;
5902         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5903                 $expires = "+1d";
5904         }
5905
5906         # write commit message
5907         if ($format eq 'html') {
5908                 my $refs = git_get_references();
5909                 my $ref = format_ref_marker($refs, $co{'id'});
5910
5911                 git_header_html(undef, $expires);
5912                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5913                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5914                 print "<div class=\"title_text\">\n" .
5915                       "<table class=\"object_header\">\n";
5916                 git_print_authorship_rows(\%co);
5917                 print "</table>".
5918                       "</div>\n";
5919                 print "<div class=\"page_body\">\n";
5920                 if (@{$co{'comment'}} > 1) {
5921                         print "<div class=\"log\">\n";
5922                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5923                         print "</div>\n"; # class="log"
5924                 }
5925
5926         } elsif ($format eq 'plain') {
5927                 my $refs = git_get_references("tags");
5928                 my $tagname = git_get_rev_name_tags($hash);
5929                 my $filename = basename($project) . "-$hash.patch";
5930
5931                 print $cgi->header(
5932                         -type => 'text/plain',
5933                         -charset => 'utf-8',
5934                         -expires => $expires,
5935                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5936                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5937                 print "From: " . to_utf8($co{'author'}) . "\n";
5938                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5939                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5940
5941                 print "X-Git-Tag: $tagname\n" if $tagname;
5942                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5943
5944                 foreach my $line (@{$co{'comment'}}) {
5945                         print to_utf8($line) . "\n";
5946                 }
5947                 print "---\n\n";
5948         } elsif ($format eq 'patch') {
5949                 my $filename = basename($project) . "-$hash.patch";
5950
5951                 print $cgi->header(
5952                         -type => 'text/plain',
5953                         -charset => 'utf-8',
5954                         -expires => $expires,
5955                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5956         }
5957
5958         # write patch
5959         if ($format eq 'html') {
5960                 my $use_parents = !defined $hash_parent ||
5961                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5962                 git_difftree_body(\@difftree, $hash,
5963                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5964                 print "<br/>\n";
5965
5966                 git_patchset_body($fd, \@difftree, $hash,
5967                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5968                 close $fd;
5969                 print "</div>\n"; # class="page_body"
5970                 git_footer_html();
5971
5972         } elsif ($format eq 'plain') {
5973                 local $/ = undef;
5974                 print <$fd>;
5975                 close $fd
5976                         or print "Reading git-diff-tree failed\n";
5977         } elsif ($format eq 'patch') {
5978                 local $/ = undef;
5979                 print <$fd>;
5980                 close $fd
5981                         or print "Reading git-format-patch failed\n";
5982         }
5983 }
5984
5985 sub git_commitdiff_plain {
5986         git_commitdiff(-format => 'plain');
5987 }
5988
5989 # format-patch-style patches
5990 sub git_patch {
5991         git_commitdiff(-format => 'patch', -single => 1);
5992 }
5993
5994 sub git_patches {
5995         git_commitdiff(-format => 'patch');
5996 }
5997
5998 sub git_history {
5999         git_log_generic('history', \&git_history_body,
6000                         $hash_base, $hash_parent_base,
6001                         $file_name, $hash);
6002 }
6003
6004 sub git_search {
6005         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6006         if (!defined $searchtext) {
6007                 die_error(400, "Text field is empty");
6008         }
6009         if (!defined $hash) {
6010                 $hash = git_get_head_hash($project);
6011         }
6012         my %co = parse_commit($hash);
6013         if (!%co) {
6014                 die_error(404, "Unknown commit object");
6015         }
6016         if (!defined $page) {
6017                 $page = 0;
6018         }
6019
6020         $searchtype ||= 'commit';
6021         if ($searchtype eq 'pickaxe') {
6022                 # pickaxe may take all resources of your box and run for several minutes
6023                 # with every query - so decide by yourself how public you make this feature
6024                 gitweb_check_feature('pickaxe')
6025                     or die_error(403, "Pickaxe is disabled");
6026         }
6027         if ($searchtype eq 'grep') {
6028                 gitweb_check_feature('grep')
6029                     or die_error(403, "Grep is disabled");
6030         }
6031
6032         git_header_html();
6033
6034         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6035                 my $greptype;
6036                 if ($searchtype eq 'commit') {
6037                         $greptype = "--grep=";
6038                 } elsif ($searchtype eq 'author') {
6039                         $greptype = "--author=";
6040                 } elsif ($searchtype eq 'committer') {
6041                         $greptype = "--committer=";
6042                 }
6043                 $greptype .= $searchtext;
6044                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6045                                                $greptype, '--regexp-ignore-case',
6046                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6047
6048                 my $paging_nav = '';
6049                 if ($page > 0) {
6050                         $paging_nav .=
6051                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6052                                                        searchtext=>$searchtext,
6053                                                        searchtype=>$searchtype)},
6054                                         "first");
6055                         $paging_nav .= " &sdot; " .
6056                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6057                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6058                 } else {
6059                         $paging_nav .= "first";
6060                         $paging_nav .= " &sdot; prev";
6061                 }
6062                 my $next_link = '';
6063                 if ($#commitlist >= 100) {
6064                         $next_link =
6065                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6066                                          -accesskey => "n", -title => "Alt-n"}, "next");
6067                         $paging_nav .= " &sdot; $next_link";
6068                 } else {
6069                         $paging_nav .= " &sdot; next";
6070                 }
6071
6072                 if ($#commitlist >= 100) {
6073                 }
6074
6075                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6076                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6077                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6078         }
6079
6080         if ($searchtype eq 'pickaxe') {
6081                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6082                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6083
6084                 print "<table class=\"pickaxe search\">\n";
6085                 my $alternate = 1;
6086                 local $/ = "\n";
6087                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6088                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6089                         ($search_use_regexp ? '--pickaxe-regex' : ());
6090                 undef %co;
6091                 my @files;
6092                 while (my $line = <$fd>) {
6093                         chomp $line;
6094                         next unless $line;
6095
6096                         my %set = parse_difftree_raw_line($line);
6097                         if (defined $set{'commit'}) {
6098                                 # finish previous commit
6099                                 if (%co) {
6100                                         print "</td>\n" .
6101                                               "<td class=\"link\">" .
6102                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6103                                               " | " .
6104                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6105                                         print "</td>\n" .
6106                                               "</tr>\n";
6107                                 }
6108
6109                                 if ($alternate) {
6110                                         print "<tr class=\"dark\">\n";
6111                                 } else {
6112                                         print "<tr class=\"light\">\n";
6113                                 }
6114                                 $alternate ^= 1;
6115                                 %co = parse_commit($set{'commit'});
6116                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6117                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6118                                       "<td><i>$author</i></td>\n" .
6119                                       "<td>" .
6120                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6121                                               -class => "list subject"},
6122                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6123                         } elsif (defined $set{'to_id'}) {
6124                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6125
6126                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6127                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6128                                               -class => "list"},
6129                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6130                                       "<br/>\n";
6131                         }
6132                 }
6133                 close $fd;
6134
6135                 # finish last commit (warning: repetition!)
6136                 if (%co) {
6137                         print "</td>\n" .
6138                               "<td class=\"link\">" .
6139                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6140                               " | " .
6141                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6142                         print "</td>\n" .
6143                               "</tr>\n";
6144                 }
6145
6146                 print "</table>\n";
6147         }
6148
6149         if ($searchtype eq 'grep') {
6150                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6151                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6152
6153                 print "<table class=\"grep_search\">\n";
6154                 my $alternate = 1;
6155                 my $matches = 0;
6156                 local $/ = "\n";
6157                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6158                         $search_use_regexp ? ('-E', '-i') : '-F',
6159                         $searchtext, $co{'tree'};
6160                 my $lastfile = '';
6161                 while (my $line = <$fd>) {
6162                         chomp $line;
6163                         my ($file, $lno, $ltext, $binary);
6164                         last if ($matches++ > 1000);
6165                         if ($line =~ /^Binary file (.+) matches$/) {
6166                                 $file = $1;
6167                                 $binary = 1;
6168                         } else {
6169                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6170                         }
6171                         if ($file ne $lastfile) {
6172                                 $lastfile and print "</td></tr>\n";
6173                                 if ($alternate++) {
6174                                         print "<tr class=\"dark\">\n";
6175                                 } else {
6176                                         print "<tr class=\"light\">\n";
6177                                 }
6178                                 print "<td class=\"list\">".
6179                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6180                                                                file_name=>"$file"),
6181                                                 -class => "list"}, esc_path($file));
6182                                 print "</td><td>\n";
6183                                 $lastfile = $file;
6184                         }
6185                         if ($binary) {
6186                                 print "<div class=\"binary\">Binary file</div>\n";
6187                         } else {
6188                                 $ltext = untabify($ltext);
6189                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6190                                         $ltext = esc_html($1, -nbsp=>1);
6191                                         $ltext .= '<span class="match">';
6192                                         $ltext .= esc_html($2, -nbsp=>1);
6193                                         $ltext .= '</span>';
6194                                         $ltext .= esc_html($3, -nbsp=>1);
6195                                 } else {
6196                                         $ltext = esc_html($ltext, -nbsp=>1);
6197                                 }
6198                                 print "<div class=\"pre\">" .
6199                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6200                                                                file_name=>"$file").'#l'.$lno,
6201                                                 -class => "linenr"}, sprintf('%4i', $lno))
6202                                         . ' ' .  $ltext . "</div>\n";
6203                         }
6204                 }
6205                 if ($lastfile) {
6206                         print "</td></tr>\n";
6207                         if ($matches > 1000) {
6208                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6209                         }
6210                 } else {
6211                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6212                 }
6213                 close $fd;
6214
6215                 print "</table>\n";
6216         }
6217         git_footer_html();
6218 }
6219
6220 sub git_search_help {
6221         git_header_html();
6222         git_print_page_nav('','', $hash,$hash,$hash);
6223         print <<EOT;
6224 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6225 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6226 the pattern entered is recognized as the POSIX extended
6227 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6228 insensitive).</p>
6229 <dl>
6230 <dt><b>commit</b></dt>
6231 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6232 EOT
6233         my $have_grep = gitweb_check_feature('grep');
6234         if ($have_grep) {
6235                 print <<EOT;
6236 <dt><b>grep</b></dt>
6237 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6238     a different one) are searched for the given pattern. On large trees, this search can take
6239 a while and put some strain on the server, so please use it with some consideration. Note that
6240 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6241 case-sensitive.</dd>
6242 EOT
6243         }
6244         print <<EOT;
6245 <dt><b>author</b></dt>
6246 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6247 <dt><b>committer</b></dt>
6248 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6249 EOT
6250         my $have_pickaxe = gitweb_check_feature('pickaxe');
6251         if ($have_pickaxe) {
6252                 print <<EOT;
6253 <dt><b>pickaxe</b></dt>
6254 <dd>All commits that caused the string to appear or disappear from any file (changes that
6255 added, removed or "modified" the string) will be listed. This search can take a while and
6256 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6257 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6258 EOT
6259         }
6260         print "</dl>\n";
6261         git_footer_html();
6262 }
6263
6264 sub git_shortlog {
6265         git_log_generic('shortlog', \&git_shortlog_body,
6266                         $hash, $hash_parent);
6267 }
6268
6269 ## ......................................................................
6270 ## feeds (RSS, Atom; OPML)
6271
6272 sub git_feed {
6273         my $format = shift || 'atom';
6274         my $have_blame = gitweb_check_feature('blame');
6275
6276         # Atom: http://www.atomenabled.org/developers/syndication/
6277         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6278         if ($format ne 'rss' && $format ne 'atom') {
6279                 die_error(400, "Unknown web feed format");
6280         }
6281
6282         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6283         my $head = $hash || 'HEAD';
6284         my @commitlist = parse_commits($head, 150, 0, $file_name);
6285
6286         my %latest_commit;
6287         my %latest_date;
6288         my $content_type = "application/$format+xml";
6289         if (defined $cgi->http('HTTP_ACCEPT') &&
6290                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6291                 # browser (feed reader) prefers text/xml
6292                 $content_type = 'text/xml';
6293         }
6294         if (defined($commitlist[0])) {
6295                 %latest_commit = %{$commitlist[0]};
6296                 my $latest_epoch = $latest_commit{'committer_epoch'};
6297                 %latest_date   = parse_date($latest_epoch);
6298                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6299                 if (defined $if_modified) {
6300                         my $since;
6301                         if (eval { require HTTP::Date; 1; }) {
6302                                 $since = HTTP::Date::str2time($if_modified);
6303                         } elsif (eval { require Time::ParseDate; 1; }) {
6304                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6305                         }
6306                         if (defined $since && $latest_epoch <= $since) {
6307                                 print $cgi->header(
6308                                         -type => $content_type,
6309                                         -charset => 'utf-8',
6310                                         -last_modified => $latest_date{'rfc2822'},
6311                                         -status => '304 Not Modified');
6312                                 return;
6313                         }
6314                 }
6315                 print $cgi->header(
6316                         -type => $content_type,
6317                         -charset => 'utf-8',
6318                         -last_modified => $latest_date{'rfc2822'});
6319         } else {
6320                 print $cgi->header(
6321                         -type => $content_type,
6322                         -charset => 'utf-8');
6323         }
6324
6325         # Optimization: skip generating the body if client asks only
6326         # for Last-Modified date.
6327         return if ($cgi->request_method() eq 'HEAD');
6328
6329         # header variables
6330         my $title = "$site_name - $project/$action";
6331         my $feed_type = 'log';
6332         if (defined $hash) {
6333                 $title .= " - '$hash'";
6334                 $feed_type = 'branch log';
6335                 if (defined $file_name) {
6336                         $title .= " :: $file_name";
6337                         $feed_type = 'history';
6338                 }
6339         } elsif (defined $file_name) {
6340                 $title .= " - $file_name";
6341                 $feed_type = 'history';
6342         }
6343         $title .= " $feed_type";
6344         my $descr = git_get_project_description($project);
6345         if (defined $descr) {
6346                 $descr = esc_html($descr);
6347         } else {
6348                 $descr = "$project " .
6349                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6350                          " feed";
6351         }
6352         my $owner = git_get_project_owner($project);
6353         $owner = esc_html($owner);
6354
6355         #header
6356         my $alt_url;
6357         if (defined $file_name) {
6358                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6359         } elsif (defined $hash) {
6360                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6361         } else {
6362                 $alt_url = href(-full=>1, action=>"summary");
6363         }
6364         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6365         if ($format eq 'rss') {
6366                 print <<XML;
6367 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6368 <channel>
6369 XML
6370                 print "<title>$title</title>\n" .
6371                       "<link>$alt_url</link>\n" .
6372                       "<description>$descr</description>\n" .
6373                       "<language>en</language>\n" .
6374                       # project owner is responsible for 'editorial' content
6375                       "<managingEditor>$owner</managingEditor>\n";
6376                 if (defined $logo || defined $favicon) {
6377                         # prefer the logo to the favicon, since RSS
6378                         # doesn't allow both
6379                         my $img = esc_url($logo || $favicon);
6380                         print "<image>\n" .
6381                               "<url>$img</url>\n" .
6382                               "<title>$title</title>\n" .
6383                               "<link>$alt_url</link>\n" .
6384                               "</image>\n";
6385                 }
6386                 if (%latest_date) {
6387                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6388                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6389                 }
6390                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6391         } elsif ($format eq 'atom') {
6392                 print <<XML;
6393 <feed xmlns="http://www.w3.org/2005/Atom">
6394 XML
6395                 print "<title>$title</title>\n" .
6396                       "<subtitle>$descr</subtitle>\n" .
6397                       '<link rel="alternate" type="text/html" href="' .
6398                       $alt_url . '" />' . "\n" .
6399                       '<link rel="self" type="' . $content_type . '" href="' .
6400                       $cgi->self_url() . '" />' . "\n" .
6401                       "<id>" . href(-full=>1) . "</id>\n" .
6402                       # use project owner for feed author
6403                       "<author><name>$owner</name></author>\n";
6404                 if (defined $favicon) {
6405                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6406                 }
6407                 if (defined $logo_url) {
6408                         # not twice as wide as tall: 72 x 27 pixels
6409                         print "<logo>" . esc_url($logo) . "</logo>\n";
6410                 }
6411                 if (! %latest_date) {
6412                         # dummy date to keep the feed valid until commits trickle in:
6413                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6414                 } else {
6415                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6416                 }
6417                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6418         }
6419
6420         # contents
6421         for (my $i = 0; $i <= $#commitlist; $i++) {
6422                 my %co = %{$commitlist[$i]};
6423                 my $commit = $co{'id'};
6424                 # we read 150, we always show 30 and the ones more recent than 48 hours
6425                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6426                         last;
6427                 }
6428                 my %cd = parse_date($co{'author_epoch'});
6429
6430                 # get list of changed files
6431                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6432                         $co{'parent'} || "--root",
6433                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6434                         or next;
6435                 my @difftree = map { chomp; $_ } <$fd>;
6436                 close $fd
6437                         or next;
6438
6439                 # print element (entry, item)
6440                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6441                 if ($format eq 'rss') {
6442                         print "<item>\n" .
6443                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6444                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6445                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6446                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6447                               "<link>$co_url</link>\n" .
6448                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6449                               "<content:encoded>" .
6450                               "<![CDATA[\n";
6451                 } elsif ($format eq 'atom') {
6452                         print "<entry>\n" .
6453                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6454                               "<updated>$cd{'iso-8601'}</updated>\n" .
6455                               "<author>\n" .
6456                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6457                         if ($co{'author_email'}) {
6458                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6459                         }
6460                         print "</author>\n" .
6461                               # use committer for contributor
6462                               "<contributor>\n" .
6463                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6464                         if ($co{'committer_email'}) {
6465                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6466                         }
6467                         print "</contributor>\n" .
6468                               "<published>$cd{'iso-8601'}</published>\n" .
6469                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6470                               "<id>$co_url</id>\n" .
6471                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6472                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6473                 }
6474                 my $comment = $co{'comment'};
6475                 print "<pre>\n";
6476                 foreach my $line (@$comment) {
6477                         $line = esc_html($line);
6478                         print "$line\n";
6479                 }
6480                 print "</pre><ul>\n";
6481                 foreach my $difftree_line (@difftree) {
6482                         my %difftree = parse_difftree_raw_line($difftree_line);
6483                         next if !$difftree{'from_id'};
6484
6485                         my $file = $difftree{'file'} || $difftree{'to_file'};
6486
6487                         print "<li>" .
6488                               "[" .
6489                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6490                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6491                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6492                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6493                                       -title => "diff"}, 'D');
6494                         if ($have_blame) {
6495                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6496                                                              file_name=>$file, hash_base=>$commit),
6497                                               -title => "blame"}, 'B');
6498                         }
6499                         # if this is not a feed of a file history
6500                         if (!defined $file_name || $file_name ne $file) {
6501                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6502                                                              file_name=>$file, hash=>$commit),
6503                                               -title => "history"}, 'H');
6504                         }
6505                         $file = esc_path($file);
6506                         print "] ".
6507                               "$file</li>\n";
6508                 }
6509                 if ($format eq 'rss') {
6510                         print "</ul>]]>\n" .
6511                               "</content:encoded>\n" .
6512                               "</item>\n";
6513                 } elsif ($format eq 'atom') {
6514                         print "</ul>\n</div>\n" .
6515                               "</content>\n" .
6516                               "</entry>\n";
6517                 }
6518         }
6519
6520         # end of feed
6521         if ($format eq 'rss') {
6522                 print "</channel>\n</rss>\n";
6523         } elsif ($format eq 'atom') {
6524                 print "</feed>\n";
6525         }
6526 }
6527
6528 sub git_rss {
6529         git_feed('rss');
6530 }
6531
6532 sub git_atom {
6533         git_feed('atom');
6534 }
6535
6536 sub git_opml {
6537         my @list = git_get_projects_list();
6538
6539         print $cgi->header(
6540                 -type => 'text/xml',
6541                 -charset => 'utf-8',
6542                 -content_disposition => 'inline; filename="opml.xml"');
6543
6544         print <<XML;
6545 <?xml version="1.0" encoding="utf-8"?>
6546 <opml version="1.0">
6547 <head>
6548   <title>$site_name OPML Export</title>
6549 </head>
6550 <body>
6551 <outline text="git RSS feeds">
6552 XML
6553
6554         foreach my $pr (@list) {
6555                 my %proj = %$pr;
6556                 my $head = git_get_head_hash($proj{'path'});
6557                 if (!defined $head) {
6558                         next;
6559                 }
6560                 $git_dir = "$projectroot/$proj{'path'}";
6561                 my %co = parse_commit($head);
6562                 if (!%co) {
6563                         next;
6564                 }
6565
6566                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6567                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6568                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6569                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6570         }
6571         print <<XML;
6572 </outline>
6573 </body>
6574 </opml>
6575 XML
6576 }